1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2009 Nokia Corporation
4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
7 #define DSS_SUBSYS_NAME "DSI"
9 #include <linux/kernel.h>
10 #include <linux/mfd/syscon.h>
11 #include <linux/regmap.h>
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/err.h>
16 #include <linux/interrupt.h>
17 #include <linux/irq.h>
18 #include <linux/delay.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/mutex.h>
21 #include <linux/module.h>
22 #include <linux/semaphore.h>
23 #include <linux/seq_file.h>
24 #include <linux/platform_device.h>
25 #include <linux/regulator/consumer.h>
26 #include <linux/wait.h>
27 #include <linux/workqueue.h>
28 #include <linux/sched.h>
29 #include <linux/slab.h>
30 #include <linux/debugfs.h>
31 #include <linux/pm_runtime.h>
33 #include <linux/of_graph.h>
34 #include <linux/of_platform.h>
35 #include <linux/component.h>
36 #include <linux/sys_soc.h>
38 #include <drm/drm_bridge.h>
39 #include <drm/drm_mipi_dsi.h>
40 #include <drm/drm_panel.h>
41 #include <video/mipi_display.h>
46 #define DSI_CATCH_MISSING_TE
50 #define REG_GET(dsi, idx, start, end) \
51 FLD_GET(dsi_read_reg(dsi, idx), start, end)
53 #define REG_FLD_MOD(dsi, idx, val, start, end) \
54 dsi_write_reg(dsi, idx, FLD_MOD(dsi_read_reg(dsi, idx), val, start, end))
56 static int dsi_init_dispc(struct dsi_data *dsi);
57 static void dsi_uninit_dispc(struct dsi_data *dsi);
59 static int dsi_vc_send_null(struct dsi_data *dsi, int vc, int channel);
61 static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi, int vc,
62 const struct mipi_dsi_msg *msg);
64 #ifdef DSI_PERF_MEASURE
66 module_param(dsi_perf, bool, 0644);
69 /* Note: for some reason video mode seems to work only if VC_VIDEO is 0 */
73 #define drm_bridge_to_dsi(bridge) \
74 container_of(bridge, struct dsi_data, bridge)
76 static inline struct dsi_data *to_dsi_data(struct omap_dss_device *dssdev)
78 return dev_get_drvdata(dssdev->dev);
81 static inline struct dsi_data *host_to_omap(struct mipi_dsi_host *host)
83 return container_of(host, struct dsi_data, host);
86 static inline void dsi_write_reg(struct dsi_data *dsi,
87 const struct dsi_reg idx, u32 val)
92 case DSI_PROTO: base = dsi->proto_base; break;
93 case DSI_PHY: base = dsi->phy_base; break;
94 case DSI_PLL: base = dsi->pll_base; break;
98 __raw_writel(val, base + idx.idx);
101 static inline u32 dsi_read_reg(struct dsi_data *dsi, const struct dsi_reg idx)
106 case DSI_PROTO: base = dsi->proto_base; break;
107 case DSI_PHY: base = dsi->phy_base; break;
108 case DSI_PLL: base = dsi->pll_base; break;
112 return __raw_readl(base + idx.idx);
115 static void dsi_bus_lock(struct dsi_data *dsi)
117 down(&dsi->bus_lock);
120 static void dsi_bus_unlock(struct dsi_data *dsi)
125 static bool dsi_bus_is_locked(struct dsi_data *dsi)
127 return dsi->bus_lock.count == 0;
130 static void dsi_completion_handler(void *data, u32 mask)
132 complete((struct completion *)data);
135 static inline bool wait_for_bit_change(struct dsi_data *dsi,
136 const struct dsi_reg idx,
137 int bitnum, int value)
139 unsigned long timeout;
143 /* first busyloop to see if the bit changes right away */
146 if (REG_GET(dsi, idx, bitnum, bitnum) == value)
150 /* then loop for 500ms, sleeping for 1ms in between */
151 timeout = jiffies + msecs_to_jiffies(500);
152 while (time_before(jiffies, timeout)) {
153 if (REG_GET(dsi, idx, bitnum, bitnum) == value)
156 wait = ns_to_ktime(1000 * 1000);
157 set_current_state(TASK_UNINTERRUPTIBLE);
158 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
164 #ifdef DSI_PERF_MEASURE
165 static void dsi_perf_mark_setup(struct dsi_data *dsi)
167 dsi->perf_setup_time = ktime_get();
170 static void dsi_perf_mark_start(struct dsi_data *dsi)
172 dsi->perf_start_time = ktime_get();
175 static void dsi_perf_show(struct dsi_data *dsi, const char *name)
177 ktime_t t, setup_time, trans_time;
179 u32 setup_us, trans_us, total_us;
186 setup_time = ktime_sub(dsi->perf_start_time, dsi->perf_setup_time);
187 setup_us = (u32)ktime_to_us(setup_time);
191 trans_time = ktime_sub(t, dsi->perf_start_time);
192 trans_us = (u32)ktime_to_us(trans_time);
196 total_us = setup_us + trans_us;
198 total_bytes = dsi->update_bytes;
200 pr_info("DSI(%s): %u us + %u us = %u us (%uHz), %u bytes, %u kbytes/sec\n",
205 1000 * 1000 / total_us,
207 total_bytes * 1000 / total_us);
210 static inline void dsi_perf_mark_setup(struct dsi_data *dsi)
214 static inline void dsi_perf_mark_start(struct dsi_data *dsi)
218 static inline void dsi_perf_show(struct dsi_data *dsi, const char *name)
223 static int verbose_irq;
225 static void print_irq_status(u32 status)
230 if (!verbose_irq && (status & ~DSI_IRQ_CHANNEL_MASK) == 0)
233 #define PIS(x) (status & DSI_IRQ_##x) ? (#x " ") : ""
235 pr_debug("DSI IRQ: 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
237 verbose_irq ? PIS(VC0) : "",
238 verbose_irq ? PIS(VC1) : "",
239 verbose_irq ? PIS(VC2) : "",
240 verbose_irq ? PIS(VC3) : "",
257 static void print_irq_status_vc(int vc, u32 status)
262 if (!verbose_irq && (status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
265 #define PIS(x) (status & DSI_VC_IRQ_##x) ? (#x " ") : ""
267 pr_debug("DSI VC(%d) IRQ 0x%x: %s%s%s%s%s%s%s%s%s\n",
273 verbose_irq ? PIS(PACKET_SENT) : "",
278 PIS(PP_BUSY_CHANGE));
282 static void print_irq_status_cio(u32 status)
287 #define PIS(x) (status & DSI_CIO_IRQ_##x) ? (#x " ") : ""
289 pr_debug("DSI CIO IRQ 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
303 PIS(ERRCONTENTIONLP0_1),
304 PIS(ERRCONTENTIONLP1_1),
305 PIS(ERRCONTENTIONLP0_2),
306 PIS(ERRCONTENTIONLP1_2),
307 PIS(ERRCONTENTIONLP0_3),
308 PIS(ERRCONTENTIONLP1_3),
309 PIS(ULPSACTIVENOT_ALL0),
310 PIS(ULPSACTIVENOT_ALL1));
314 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
315 static void dsi_collect_irq_stats(struct dsi_data *dsi, u32 irqstatus,
316 u32 *vcstatus, u32 ciostatus)
320 spin_lock(&dsi->irq_stats_lock);
322 dsi->irq_stats.irq_count++;
323 dss_collect_irq_stats(irqstatus, dsi->irq_stats.dsi_irqs);
325 for (i = 0; i < 4; ++i)
326 dss_collect_irq_stats(vcstatus[i], dsi->irq_stats.vc_irqs[i]);
328 dss_collect_irq_stats(ciostatus, dsi->irq_stats.cio_irqs);
330 spin_unlock(&dsi->irq_stats_lock);
333 #define dsi_collect_irq_stats(dsi, irqstatus, vcstatus, ciostatus)
336 static int debug_irq;
338 static void dsi_handle_irq_errors(struct dsi_data *dsi, u32 irqstatus,
339 u32 *vcstatus, u32 ciostatus)
343 if (irqstatus & DSI_IRQ_ERROR_MASK) {
344 DSSERR("DSI error, irqstatus %x\n", irqstatus);
345 print_irq_status(irqstatus);
346 spin_lock(&dsi->errors_lock);
347 dsi->errors |= irqstatus & DSI_IRQ_ERROR_MASK;
348 spin_unlock(&dsi->errors_lock);
349 } else if (debug_irq) {
350 print_irq_status(irqstatus);
353 for (i = 0; i < 4; ++i) {
354 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
355 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
357 print_irq_status_vc(i, vcstatus[i]);
358 } else if (debug_irq) {
359 print_irq_status_vc(i, vcstatus[i]);
363 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
364 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
365 print_irq_status_cio(ciostatus);
366 } else if (debug_irq) {
367 print_irq_status_cio(ciostatus);
371 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
372 unsigned int isr_array_size, u32 irqstatus)
374 struct dsi_isr_data *isr_data;
377 for (i = 0; i < isr_array_size; i++) {
378 isr_data = &isr_array[i];
379 if (isr_data->isr && isr_data->mask & irqstatus)
380 isr_data->isr(isr_data->arg, irqstatus);
384 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
385 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
389 dsi_call_isrs(isr_tables->isr_table,
390 ARRAY_SIZE(isr_tables->isr_table),
393 for (i = 0; i < 4; ++i) {
394 if (vcstatus[i] == 0)
396 dsi_call_isrs(isr_tables->isr_table_vc[i],
397 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
402 dsi_call_isrs(isr_tables->isr_table_cio,
403 ARRAY_SIZE(isr_tables->isr_table_cio),
407 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
409 struct dsi_data *dsi = arg;
410 u32 irqstatus, vcstatus[4], ciostatus;
413 if (!dsi->is_enabled)
416 spin_lock(&dsi->irq_lock);
418 irqstatus = dsi_read_reg(dsi, DSI_IRQSTATUS);
420 /* IRQ is not for us */
422 spin_unlock(&dsi->irq_lock);
426 dsi_write_reg(dsi, DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
427 /* flush posted write */
428 dsi_read_reg(dsi, DSI_IRQSTATUS);
430 for (i = 0; i < 4; ++i) {
431 if ((irqstatus & (1 << i)) == 0) {
436 vcstatus[i] = dsi_read_reg(dsi, DSI_VC_IRQSTATUS(i));
438 dsi_write_reg(dsi, DSI_VC_IRQSTATUS(i), vcstatus[i]);
439 /* flush posted write */
440 dsi_read_reg(dsi, DSI_VC_IRQSTATUS(i));
443 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
444 ciostatus = dsi_read_reg(dsi, DSI_COMPLEXIO_IRQ_STATUS);
446 dsi_write_reg(dsi, DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
447 /* flush posted write */
448 dsi_read_reg(dsi, DSI_COMPLEXIO_IRQ_STATUS);
453 #ifdef DSI_CATCH_MISSING_TE
454 if (irqstatus & DSI_IRQ_TE_TRIGGER)
455 del_timer(&dsi->te_timer);
458 /* make a copy and unlock, so that isrs can unregister
460 memcpy(&dsi->isr_tables_copy, &dsi->isr_tables,
461 sizeof(dsi->isr_tables));
463 spin_unlock(&dsi->irq_lock);
465 dsi_handle_isrs(&dsi->isr_tables_copy, irqstatus, vcstatus, ciostatus);
467 dsi_handle_irq_errors(dsi, irqstatus, vcstatus, ciostatus);
469 dsi_collect_irq_stats(dsi, irqstatus, vcstatus, ciostatus);
474 /* dsi->irq_lock has to be locked by the caller */
475 static void _omap_dsi_configure_irqs(struct dsi_data *dsi,
476 struct dsi_isr_data *isr_array,
477 unsigned int isr_array_size,
479 const struct dsi_reg enable_reg,
480 const struct dsi_reg status_reg)
482 struct dsi_isr_data *isr_data;
489 for (i = 0; i < isr_array_size; i++) {
490 isr_data = &isr_array[i];
492 if (isr_data->isr == NULL)
495 mask |= isr_data->mask;
498 old_mask = dsi_read_reg(dsi, enable_reg);
499 /* clear the irqstatus for newly enabled irqs */
500 dsi_write_reg(dsi, status_reg, (mask ^ old_mask) & mask);
501 dsi_write_reg(dsi, enable_reg, mask);
503 /* flush posted writes */
504 dsi_read_reg(dsi, enable_reg);
505 dsi_read_reg(dsi, status_reg);
508 /* dsi->irq_lock has to be locked by the caller */
509 static void _omap_dsi_set_irqs(struct dsi_data *dsi)
511 u32 mask = DSI_IRQ_ERROR_MASK;
512 #ifdef DSI_CATCH_MISSING_TE
513 mask |= DSI_IRQ_TE_TRIGGER;
515 _omap_dsi_configure_irqs(dsi, dsi->isr_tables.isr_table,
516 ARRAY_SIZE(dsi->isr_tables.isr_table), mask,
517 DSI_IRQENABLE, DSI_IRQSTATUS);
520 /* dsi->irq_lock has to be locked by the caller */
521 static void _omap_dsi_set_irqs_vc(struct dsi_data *dsi, int vc)
523 _omap_dsi_configure_irqs(dsi, dsi->isr_tables.isr_table_vc[vc],
524 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]),
525 DSI_VC_IRQ_ERROR_MASK,
526 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
529 /* dsi->irq_lock has to be locked by the caller */
530 static void _omap_dsi_set_irqs_cio(struct dsi_data *dsi)
532 _omap_dsi_configure_irqs(dsi, dsi->isr_tables.isr_table_cio,
533 ARRAY_SIZE(dsi->isr_tables.isr_table_cio),
534 DSI_CIO_IRQ_ERROR_MASK,
535 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
538 static void _dsi_initialize_irq(struct dsi_data *dsi)
543 spin_lock_irqsave(&dsi->irq_lock, flags);
545 memset(&dsi->isr_tables, 0, sizeof(dsi->isr_tables));
547 _omap_dsi_set_irqs(dsi);
548 for (vc = 0; vc < 4; ++vc)
549 _omap_dsi_set_irqs_vc(dsi, vc);
550 _omap_dsi_set_irqs_cio(dsi);
552 spin_unlock_irqrestore(&dsi->irq_lock, flags);
555 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
556 struct dsi_isr_data *isr_array, unsigned int isr_array_size)
558 struct dsi_isr_data *isr_data;
564 /* check for duplicate entry and find a free slot */
566 for (i = 0; i < isr_array_size; i++) {
567 isr_data = &isr_array[i];
569 if (isr_data->isr == isr && isr_data->arg == arg &&
570 isr_data->mask == mask) {
574 if (isr_data->isr == NULL && free_idx == -1)
581 isr_data = &isr_array[free_idx];
584 isr_data->mask = mask;
589 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
590 struct dsi_isr_data *isr_array, unsigned int isr_array_size)
592 struct dsi_isr_data *isr_data;
595 for (i = 0; i < isr_array_size; i++) {
596 isr_data = &isr_array[i];
597 if (isr_data->isr != isr || isr_data->arg != arg ||
598 isr_data->mask != mask)
601 isr_data->isr = NULL;
602 isr_data->arg = NULL;
611 static int dsi_register_isr(struct dsi_data *dsi, omap_dsi_isr_t isr,
617 spin_lock_irqsave(&dsi->irq_lock, flags);
619 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table,
620 ARRAY_SIZE(dsi->isr_tables.isr_table));
623 _omap_dsi_set_irqs(dsi);
625 spin_unlock_irqrestore(&dsi->irq_lock, flags);
630 static int dsi_unregister_isr(struct dsi_data *dsi, omap_dsi_isr_t isr,
636 spin_lock_irqsave(&dsi->irq_lock, flags);
638 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table,
639 ARRAY_SIZE(dsi->isr_tables.isr_table));
642 _omap_dsi_set_irqs(dsi);
644 spin_unlock_irqrestore(&dsi->irq_lock, flags);
649 static int dsi_register_isr_vc(struct dsi_data *dsi, int vc,
650 omap_dsi_isr_t isr, void *arg, u32 mask)
655 spin_lock_irqsave(&dsi->irq_lock, flags);
657 r = _dsi_register_isr(isr, arg, mask,
658 dsi->isr_tables.isr_table_vc[vc],
659 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]));
662 _omap_dsi_set_irqs_vc(dsi, vc);
664 spin_unlock_irqrestore(&dsi->irq_lock, flags);
669 static int dsi_unregister_isr_vc(struct dsi_data *dsi, int vc,
670 omap_dsi_isr_t isr, void *arg, u32 mask)
675 spin_lock_irqsave(&dsi->irq_lock, flags);
677 r = _dsi_unregister_isr(isr, arg, mask,
678 dsi->isr_tables.isr_table_vc[vc],
679 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]));
682 _omap_dsi_set_irqs_vc(dsi, vc);
684 spin_unlock_irqrestore(&dsi->irq_lock, flags);
689 static u32 dsi_get_errors(struct dsi_data *dsi)
694 spin_lock_irqsave(&dsi->errors_lock, flags);
697 spin_unlock_irqrestore(&dsi->errors_lock, flags);
701 static int dsi_runtime_get(struct dsi_data *dsi)
705 DSSDBG("dsi_runtime_get\n");
707 r = pm_runtime_get_sync(dsi->dev);
708 if (WARN_ON(r < 0)) {
709 pm_runtime_put_noidle(dsi->dev);
715 static void dsi_runtime_put(struct dsi_data *dsi)
719 DSSDBG("dsi_runtime_put\n");
721 r = pm_runtime_put_sync(dsi->dev);
722 WARN_ON(r < 0 && r != -ENOSYS);
725 static void _dsi_print_reset_status(struct dsi_data *dsi)
729 /* A dummy read using the SCP interface to any DSIPHY register is
730 * required after DSIPHY reset to complete the reset of the DSI complex
732 dsi_read_reg(dsi, DSI_DSIPHY_CFG5);
734 if (dsi->data->quirks & DSI_QUIRK_REVERSE_TXCLKESC) {
744 #define DSI_FLD_GET(fld, start, end)\
745 FLD_GET(dsi_read_reg(dsi, DSI_##fld), start, end)
747 pr_debug("DSI resets: PLL (%d) CIO (%d) PHY (%x%x%x, %d, %d, %d)\n",
748 DSI_FLD_GET(PLL_STATUS, 0, 0),
749 DSI_FLD_GET(COMPLEXIO_CFG1, 29, 29),
750 DSI_FLD_GET(DSIPHY_CFG5, b0, b0),
751 DSI_FLD_GET(DSIPHY_CFG5, b1, b1),
752 DSI_FLD_GET(DSIPHY_CFG5, b2, b2),
753 DSI_FLD_GET(DSIPHY_CFG5, 29, 29),
754 DSI_FLD_GET(DSIPHY_CFG5, 30, 30),
755 DSI_FLD_GET(DSIPHY_CFG5, 31, 31));
760 static inline int dsi_if_enable(struct dsi_data *dsi, bool enable)
762 DSSDBG("dsi_if_enable(%d)\n", enable);
764 enable = enable ? 1 : 0;
765 REG_FLD_MOD(dsi, DSI_CTRL, enable, 0, 0); /* IF_EN */
767 if (!wait_for_bit_change(dsi, DSI_CTRL, 0, enable)) {
768 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
775 static unsigned long dsi_get_pll_hsdiv_dispc_rate(struct dsi_data *dsi)
777 return dsi->pll.cinfo.clkout[HSDIV_DISPC];
780 static unsigned long dsi_get_pll_hsdiv_dsi_rate(struct dsi_data *dsi)
782 return dsi->pll.cinfo.clkout[HSDIV_DSI];
785 static unsigned long dsi_get_txbyteclkhs(struct dsi_data *dsi)
787 return dsi->pll.cinfo.clkdco / 16;
790 static unsigned long dsi_fclk_rate(struct dsi_data *dsi)
793 enum dss_clk_source source;
795 source = dss_get_dsi_clk_source(dsi->dss, dsi->module_id);
796 if (source == DSS_CLK_SRC_FCK) {
797 /* DSI FCLK source is DSS_CLK_FCK */
798 r = clk_get_rate(dsi->dss_clk);
800 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
801 r = dsi_get_pll_hsdiv_dsi_rate(dsi);
807 static int dsi_lp_clock_calc(unsigned long dsi_fclk,
808 unsigned long lp_clk_min, unsigned long lp_clk_max,
809 struct dsi_lp_clock_info *lp_cinfo)
811 unsigned int lp_clk_div;
812 unsigned long lp_clk;
814 lp_clk_div = DIV_ROUND_UP(dsi_fclk, lp_clk_max * 2);
815 lp_clk = dsi_fclk / 2 / lp_clk_div;
817 if (lp_clk < lp_clk_min || lp_clk > lp_clk_max)
820 lp_cinfo->lp_clk_div = lp_clk_div;
821 lp_cinfo->lp_clk = lp_clk;
826 static int dsi_set_lp_clk_divisor(struct dsi_data *dsi)
828 unsigned long dsi_fclk;
829 unsigned int lp_clk_div;
830 unsigned long lp_clk;
831 unsigned int lpdiv_max = dsi->data->max_pll_lpdiv;
834 lp_clk_div = dsi->user_lp_cinfo.lp_clk_div;
836 if (lp_clk_div == 0 || lp_clk_div > lpdiv_max)
839 dsi_fclk = dsi_fclk_rate(dsi);
841 lp_clk = dsi_fclk / 2 / lp_clk_div;
843 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
844 dsi->current_lp_cinfo.lp_clk = lp_clk;
845 dsi->current_lp_cinfo.lp_clk_div = lp_clk_div;
848 REG_FLD_MOD(dsi, DSI_CLK_CTRL, lp_clk_div, 12, 0);
850 /* LP_RX_SYNCHRO_ENABLE */
851 REG_FLD_MOD(dsi, DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0, 21, 21);
856 static void dsi_enable_scp_clk(struct dsi_data *dsi)
858 if (dsi->scp_clk_refcount++ == 0)
859 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */
862 static void dsi_disable_scp_clk(struct dsi_data *dsi)
864 WARN_ON(dsi->scp_clk_refcount == 0);
865 if (--dsi->scp_clk_refcount == 0)
866 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */
869 enum dsi_pll_power_state {
870 DSI_PLL_POWER_OFF = 0x0,
871 DSI_PLL_POWER_ON_HSCLK = 0x1,
872 DSI_PLL_POWER_ON_ALL = 0x2,
873 DSI_PLL_POWER_ON_DIV = 0x3,
876 static int dsi_pll_power(struct dsi_data *dsi, enum dsi_pll_power_state state)
880 /* DSI-PLL power command 0x3 is not working */
881 if ((dsi->data->quirks & DSI_QUIRK_PLL_PWR_BUG) &&
882 state == DSI_PLL_POWER_ON_DIV)
883 state = DSI_PLL_POWER_ON_ALL;
886 REG_FLD_MOD(dsi, DSI_CLK_CTRL, state, 31, 30);
889 while (FLD_GET(dsi_read_reg(dsi, DSI_CLK_CTRL), 29, 28) != state) {
891 DSSERR("Failed to set DSI PLL power mode to %d\n",
902 static void dsi_pll_calc_dsi_fck(struct dsi_data *dsi,
903 struct dss_pll_clock_info *cinfo)
905 unsigned long max_dsi_fck;
907 max_dsi_fck = dsi->data->max_fck_freq;
909 cinfo->mX[HSDIV_DSI] = DIV_ROUND_UP(cinfo->clkdco, max_dsi_fck);
910 cinfo->clkout[HSDIV_DSI] = cinfo->clkdco / cinfo->mX[HSDIV_DSI];
913 static int dsi_pll_enable(struct dss_pll *pll)
915 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
918 DSSDBG("PLL init\n");
920 r = dsi_runtime_get(dsi);
925 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4.
927 dsi_enable_scp_clk(dsi);
929 r = regulator_enable(dsi->vdds_dsi_reg);
933 /* XXX PLL does not come out of reset without this... */
934 dispc_pck_free_enable(dsi->dss->dispc, 1);
936 if (!wait_for_bit_change(dsi, DSI_PLL_STATUS, 0, 1)) {
937 DSSERR("PLL not coming out of reset.\n");
939 dispc_pck_free_enable(dsi->dss->dispc, 0);
943 /* XXX ... but if left on, we get problems when planes do not
944 * fill the whole display. No idea about this */
945 dispc_pck_free_enable(dsi->dss->dispc, 0);
947 r = dsi_pll_power(dsi, DSI_PLL_POWER_ON_ALL);
952 DSSDBG("PLL init done\n");
956 regulator_disable(dsi->vdds_dsi_reg);
958 dsi_disable_scp_clk(dsi);
959 dsi_runtime_put(dsi);
963 static void dsi_pll_disable(struct dss_pll *pll)
965 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll);
967 dsi_pll_power(dsi, DSI_PLL_POWER_OFF);
969 regulator_disable(dsi->vdds_dsi_reg);
971 dsi_disable_scp_clk(dsi);
972 dsi_runtime_put(dsi);
974 DSSDBG("PLL disable done\n");
977 static int dsi_dump_dsi_clocks(struct seq_file *s, void *p)
979 struct dsi_data *dsi = s->private;
980 struct dss_pll_clock_info *cinfo = &dsi->pll.cinfo;
981 enum dss_clk_source dispc_clk_src, dsi_clk_src;
982 int dsi_module = dsi->module_id;
983 struct dss_pll *pll = &dsi->pll;
985 dispc_clk_src = dss_get_dispc_clk_source(dsi->dss);
986 dsi_clk_src = dss_get_dsi_clk_source(dsi->dss, dsi_module);
988 if (dsi_runtime_get(dsi))
991 seq_printf(s, "- DSI%d PLL -\n", dsi_module + 1);
993 seq_printf(s, "dsi pll clkin\t%lu\n", clk_get_rate(pll->clkin));
995 seq_printf(s, "Fint\t\t%-16lun %u\n", cinfo->fint, cinfo->n);
997 seq_printf(s, "CLKIN4DDR\t%-16lum %u\n",
998 cinfo->clkdco, cinfo->m);
1000 seq_printf(s, "DSI_PLL_HSDIV_DISPC (%s)\t%-16lum_dispc %u\t(%s)\n",
1001 dss_get_clk_source_name(dsi_module == 0 ?
1002 DSS_CLK_SRC_PLL1_1 :
1003 DSS_CLK_SRC_PLL2_1),
1004 cinfo->clkout[HSDIV_DISPC],
1005 cinfo->mX[HSDIV_DISPC],
1006 dispc_clk_src == DSS_CLK_SRC_FCK ?
1009 seq_printf(s, "DSI_PLL_HSDIV_DSI (%s)\t%-16lum_dsi %u\t(%s)\n",
1010 dss_get_clk_source_name(dsi_module == 0 ?
1011 DSS_CLK_SRC_PLL1_2 :
1012 DSS_CLK_SRC_PLL2_2),
1013 cinfo->clkout[HSDIV_DSI],
1014 cinfo->mX[HSDIV_DSI],
1015 dsi_clk_src == DSS_CLK_SRC_FCK ?
1018 seq_printf(s, "- DSI%d -\n", dsi_module + 1);
1020 seq_printf(s, "dsi fclk source = %s\n",
1021 dss_get_clk_source_name(dsi_clk_src));
1023 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate(dsi));
1025 seq_printf(s, "DDR_CLK\t\t%lu\n",
1028 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs(dsi));
1030 seq_printf(s, "LP_CLK\t\t%lu\n", dsi->current_lp_cinfo.lp_clk);
1032 dsi_runtime_put(dsi);
1037 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1038 static int dsi_dump_dsi_irqs(struct seq_file *s, void *p)
1040 struct dsi_data *dsi = s->private;
1041 unsigned long flags;
1042 struct dsi_irq_stats stats;
1044 spin_lock_irqsave(&dsi->irq_stats_lock, flags);
1046 stats = dsi->irq_stats;
1047 memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats));
1048 dsi->irq_stats.last_reset = jiffies;
1050 spin_unlock_irqrestore(&dsi->irq_stats_lock, flags);
1052 seq_printf(s, "period %u ms\n",
1053 jiffies_to_msecs(jiffies - stats.last_reset));
1055 seq_printf(s, "irqs %d\n", stats.irq_count);
1057 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1059 seq_printf(s, "-- DSI%d interrupts --\n", dsi->module_id + 1);
1075 PIS(LDO_POWER_GOOD);
1080 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1081 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1082 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1083 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1084 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1086 seq_printf(s, "-- VC interrupts --\n");
1095 PIS(PP_BUSY_CHANGE);
1099 seq_printf(s, "%-20s %10d\n", #x, \
1100 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1102 seq_printf(s, "-- CIO interrupts --\n");
1115 PIS(ERRCONTENTIONLP0_1);
1116 PIS(ERRCONTENTIONLP1_1);
1117 PIS(ERRCONTENTIONLP0_2);
1118 PIS(ERRCONTENTIONLP1_2);
1119 PIS(ERRCONTENTIONLP0_3);
1120 PIS(ERRCONTENTIONLP1_3);
1121 PIS(ULPSACTIVENOT_ALL0);
1122 PIS(ULPSACTIVENOT_ALL1);
1129 static int dsi_dump_dsi_regs(struct seq_file *s, void *p)
1131 struct dsi_data *dsi = s->private;
1133 if (dsi_runtime_get(dsi))
1135 dsi_enable_scp_clk(dsi);
1137 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(dsi, r))
1138 DUMPREG(DSI_REVISION);
1139 DUMPREG(DSI_SYSCONFIG);
1140 DUMPREG(DSI_SYSSTATUS);
1141 DUMPREG(DSI_IRQSTATUS);
1142 DUMPREG(DSI_IRQENABLE);
1144 DUMPREG(DSI_COMPLEXIO_CFG1);
1145 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1146 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1147 DUMPREG(DSI_CLK_CTRL);
1148 DUMPREG(DSI_TIMING1);
1149 DUMPREG(DSI_TIMING2);
1150 DUMPREG(DSI_VM_TIMING1);
1151 DUMPREG(DSI_VM_TIMING2);
1152 DUMPREG(DSI_VM_TIMING3);
1153 DUMPREG(DSI_CLK_TIMING);
1154 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1155 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1156 DUMPREG(DSI_COMPLEXIO_CFG2);
1157 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1158 DUMPREG(DSI_VM_TIMING4);
1159 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1160 DUMPREG(DSI_VM_TIMING5);
1161 DUMPREG(DSI_VM_TIMING6);
1162 DUMPREG(DSI_VM_TIMING7);
1163 DUMPREG(DSI_STOPCLK_TIMING);
1165 DUMPREG(DSI_VC_CTRL(0));
1166 DUMPREG(DSI_VC_TE(0));
1167 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1168 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1169 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1170 DUMPREG(DSI_VC_IRQSTATUS(0));
1171 DUMPREG(DSI_VC_IRQENABLE(0));
1173 DUMPREG(DSI_VC_CTRL(1));
1174 DUMPREG(DSI_VC_TE(1));
1175 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1176 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1177 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1178 DUMPREG(DSI_VC_IRQSTATUS(1));
1179 DUMPREG(DSI_VC_IRQENABLE(1));
1181 DUMPREG(DSI_VC_CTRL(2));
1182 DUMPREG(DSI_VC_TE(2));
1183 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1184 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1185 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1186 DUMPREG(DSI_VC_IRQSTATUS(2));
1187 DUMPREG(DSI_VC_IRQENABLE(2));
1189 DUMPREG(DSI_VC_CTRL(3));
1190 DUMPREG(DSI_VC_TE(3));
1191 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1192 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1193 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1194 DUMPREG(DSI_VC_IRQSTATUS(3));
1195 DUMPREG(DSI_VC_IRQENABLE(3));
1197 DUMPREG(DSI_DSIPHY_CFG0);
1198 DUMPREG(DSI_DSIPHY_CFG1);
1199 DUMPREG(DSI_DSIPHY_CFG2);
1200 DUMPREG(DSI_DSIPHY_CFG5);
1202 DUMPREG(DSI_PLL_CONTROL);
1203 DUMPREG(DSI_PLL_STATUS);
1204 DUMPREG(DSI_PLL_GO);
1205 DUMPREG(DSI_PLL_CONFIGURATION1);
1206 DUMPREG(DSI_PLL_CONFIGURATION2);
1209 dsi_disable_scp_clk(dsi);
1210 dsi_runtime_put(dsi);
1215 enum dsi_cio_power_state {
1216 DSI_COMPLEXIO_POWER_OFF = 0x0,
1217 DSI_COMPLEXIO_POWER_ON = 0x1,
1218 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1221 static int dsi_cio_power(struct dsi_data *dsi, enum dsi_cio_power_state state)
1226 REG_FLD_MOD(dsi, DSI_COMPLEXIO_CFG1, state, 28, 27);
1229 while (FLD_GET(dsi_read_reg(dsi, DSI_COMPLEXIO_CFG1),
1232 DSSERR("failed to set complexio power state to "
1242 static unsigned int dsi_get_line_buf_size(struct dsi_data *dsi)
1246 /* line buffer on OMAP3 is 1024 x 24bits */
1247 /* XXX: for some reason using full buffer size causes
1248 * considerable TX slowdown with update sizes that fill the
1250 if (!(dsi->data->quirks & DSI_QUIRK_GNQ))
1253 val = REG_GET(dsi, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */
1257 return 512 * 3; /* 512x24 bits */
1259 return 682 * 3; /* 682x24 bits */
1261 return 853 * 3; /* 853x24 bits */
1263 return 1024 * 3; /* 1024x24 bits */
1265 return 1194 * 3; /* 1194x24 bits */
1267 return 1365 * 3; /* 1365x24 bits */
1269 return 1920 * 3; /* 1920x24 bits */
1276 static int dsi_set_lane_config(struct dsi_data *dsi)
1278 static const u8 offsets[] = { 0, 4, 8, 12, 16 };
1279 static const enum dsi_lane_function functions[] = {
1289 r = dsi_read_reg(dsi, DSI_COMPLEXIO_CFG1);
1291 for (i = 0; i < dsi->num_lanes_used; ++i) {
1292 unsigned int offset = offsets[i];
1293 unsigned int polarity, lane_number;
1296 for (t = 0; t < dsi->num_lanes_supported; ++t)
1297 if (dsi->lanes[t].function == functions[i])
1300 if (t == dsi->num_lanes_supported)
1304 polarity = dsi->lanes[t].polarity;
1306 r = FLD_MOD(r, lane_number + 1, offset + 2, offset);
1307 r = FLD_MOD(r, polarity, offset + 3, offset + 3);
1310 /* clear the unused lanes */
1311 for (; i < dsi->num_lanes_supported; ++i) {
1312 unsigned int offset = offsets[i];
1314 r = FLD_MOD(r, 0, offset + 2, offset);
1315 r = FLD_MOD(r, 0, offset + 3, offset + 3);
1318 dsi_write_reg(dsi, DSI_COMPLEXIO_CFG1, r);
1323 static inline unsigned int ns2ddr(struct dsi_data *dsi, unsigned int ns)
1325 /* convert time in ns to ddr ticks, rounding up */
1326 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1328 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1331 static inline unsigned int ddr2ns(struct dsi_data *dsi, unsigned int ddr)
1333 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4;
1335 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1338 static void dsi_cio_timings(struct dsi_data *dsi)
1341 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1342 u32 tlpx_half, tclk_trail, tclk_zero;
1345 /* calculate timings */
1347 /* 1 * DDR_CLK = 2 * UI */
1349 /* min 40ns + 4*UI max 85ns + 6*UI */
1350 ths_prepare = ns2ddr(dsi, 70) + 2;
1352 /* min 145ns + 10*UI */
1353 ths_prepare_ths_zero = ns2ddr(dsi, 175) + 2;
1355 /* min max(8*UI, 60ns+4*UI) */
1356 ths_trail = ns2ddr(dsi, 60) + 5;
1359 ths_exit = ns2ddr(dsi, 145);
1362 tlpx_half = ns2ddr(dsi, 25);
1365 tclk_trail = ns2ddr(dsi, 60) + 2;
1367 /* min 38ns, max 95ns */
1368 tclk_prepare = ns2ddr(dsi, 65);
1370 /* min tclk-prepare + tclk-zero = 300ns */
1371 tclk_zero = ns2ddr(dsi, 260);
1373 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1374 ths_prepare, ddr2ns(dsi, ths_prepare),
1375 ths_prepare_ths_zero, ddr2ns(dsi, ths_prepare_ths_zero));
1376 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1377 ths_trail, ddr2ns(dsi, ths_trail),
1378 ths_exit, ddr2ns(dsi, ths_exit));
1380 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1381 "tclk_zero %u (%uns)\n",
1382 tlpx_half, ddr2ns(dsi, tlpx_half),
1383 tclk_trail, ddr2ns(dsi, tclk_trail),
1384 tclk_zero, ddr2ns(dsi, tclk_zero));
1385 DSSDBG("tclk_prepare %u (%uns)\n",
1386 tclk_prepare, ddr2ns(dsi, tclk_prepare));
1388 /* program timings */
1390 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG0);
1391 r = FLD_MOD(r, ths_prepare, 31, 24);
1392 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1393 r = FLD_MOD(r, ths_trail, 15, 8);
1394 r = FLD_MOD(r, ths_exit, 7, 0);
1395 dsi_write_reg(dsi, DSI_DSIPHY_CFG0, r);
1397 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG1);
1398 r = FLD_MOD(r, tlpx_half, 20, 16);
1399 r = FLD_MOD(r, tclk_trail, 15, 8);
1400 r = FLD_MOD(r, tclk_zero, 7, 0);
1402 if (dsi->data->quirks & DSI_QUIRK_PHY_DCC) {
1403 r = FLD_MOD(r, 0, 21, 21); /* DCCEN = disable */
1404 r = FLD_MOD(r, 1, 22, 22); /* CLKINP_DIVBY2EN = enable */
1405 r = FLD_MOD(r, 1, 23, 23); /* CLKINP_SEL = enable */
1408 dsi_write_reg(dsi, DSI_DSIPHY_CFG1, r);
1410 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG2);
1411 r = FLD_MOD(r, tclk_prepare, 7, 0);
1412 dsi_write_reg(dsi, DSI_DSIPHY_CFG2, r);
1415 static int dsi_cio_wait_tx_clk_esc_reset(struct dsi_data *dsi)
1418 bool in_use[DSI_MAX_NR_LANES];
1419 static const u8 offsets_old[] = { 28, 27, 26 };
1420 static const u8 offsets_new[] = { 24, 25, 26, 27, 28 };
1423 if (dsi->data->quirks & DSI_QUIRK_REVERSE_TXCLKESC)
1424 offsets = offsets_old;
1426 offsets = offsets_new;
1428 for (i = 0; i < dsi->num_lanes_supported; ++i)
1429 in_use[i] = dsi->lanes[i].function != DSI_LANE_UNUSED;
1436 l = dsi_read_reg(dsi, DSI_DSIPHY_CFG5);
1439 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1440 if (!in_use[i] || (l & (1 << offsets[i])))
1444 if (ok == dsi->num_lanes_supported)
1448 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1449 if (!in_use[i] || (l & (1 << offsets[i])))
1452 DSSERR("CIO TXCLKESC%d domain not coming " \
1453 "out of reset\n", i);
1462 /* return bitmask of enabled lanes, lane0 being the lsb */
1463 static unsigned int dsi_get_lane_mask(struct dsi_data *dsi)
1465 unsigned int mask = 0;
1468 for (i = 0; i < dsi->num_lanes_supported; ++i) {
1469 if (dsi->lanes[i].function != DSI_LANE_UNUSED)
1476 /* OMAP4 CONTROL_DSIPHY */
1477 #define OMAP4_DSIPHY_SYSCON_OFFSET 0x78
1479 #define OMAP4_DSI2_LANEENABLE_SHIFT 29
1480 #define OMAP4_DSI2_LANEENABLE_MASK (0x7 << 29)
1481 #define OMAP4_DSI1_LANEENABLE_SHIFT 24
1482 #define OMAP4_DSI1_LANEENABLE_MASK (0x1f << 24)
1483 #define OMAP4_DSI1_PIPD_SHIFT 19
1484 #define OMAP4_DSI1_PIPD_MASK (0x1f << 19)
1485 #define OMAP4_DSI2_PIPD_SHIFT 14
1486 #define OMAP4_DSI2_PIPD_MASK (0x1f << 14)
1488 static int dsi_omap4_mux_pads(struct dsi_data *dsi, unsigned int lanes)
1490 u32 enable_mask, enable_shift;
1491 u32 pipd_mask, pipd_shift;
1493 if (dsi->module_id == 0) {
1494 enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
1495 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
1496 pipd_mask = OMAP4_DSI1_PIPD_MASK;
1497 pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
1498 } else if (dsi->module_id == 1) {
1499 enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
1500 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
1501 pipd_mask = OMAP4_DSI2_PIPD_MASK;
1502 pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
1507 return regmap_update_bits(dsi->syscon, OMAP4_DSIPHY_SYSCON_OFFSET,
1508 enable_mask | pipd_mask,
1509 (lanes << enable_shift) | (lanes << pipd_shift));
1512 /* OMAP5 CONTROL_DSIPHY */
1514 #define OMAP5_DSIPHY_SYSCON_OFFSET 0x74
1516 #define OMAP5_DSI1_LANEENABLE_SHIFT 24
1517 #define OMAP5_DSI2_LANEENABLE_SHIFT 19
1518 #define OMAP5_DSI_LANEENABLE_MASK 0x1f
1520 static int dsi_omap5_mux_pads(struct dsi_data *dsi, unsigned int lanes)
1524 if (dsi->module_id == 0)
1525 enable_shift = OMAP5_DSI1_LANEENABLE_SHIFT;
1526 else if (dsi->module_id == 1)
1527 enable_shift = OMAP5_DSI2_LANEENABLE_SHIFT;
1531 return regmap_update_bits(dsi->syscon, OMAP5_DSIPHY_SYSCON_OFFSET,
1532 OMAP5_DSI_LANEENABLE_MASK << enable_shift,
1533 lanes << enable_shift);
1536 static int dsi_enable_pads(struct dsi_data *dsi, unsigned int lane_mask)
1538 if (dsi->data->model == DSI_MODEL_OMAP4)
1539 return dsi_omap4_mux_pads(dsi, lane_mask);
1540 if (dsi->data->model == DSI_MODEL_OMAP5)
1541 return dsi_omap5_mux_pads(dsi, lane_mask);
1545 static void dsi_disable_pads(struct dsi_data *dsi)
1547 if (dsi->data->model == DSI_MODEL_OMAP4)
1548 dsi_omap4_mux_pads(dsi, 0);
1549 else if (dsi->data->model == DSI_MODEL_OMAP5)
1550 dsi_omap5_mux_pads(dsi, 0);
1553 static int dsi_cio_init(struct dsi_data *dsi)
1558 DSSDBG("DSI CIO init starts");
1560 r = dsi_enable_pads(dsi, dsi_get_lane_mask(dsi));
1564 dsi_enable_scp_clk(dsi);
1566 /* A dummy read using the SCP interface to any DSIPHY register is
1567 * required after DSIPHY reset to complete the reset of the DSI complex
1569 dsi_read_reg(dsi, DSI_DSIPHY_CFG5);
1571 if (!wait_for_bit_change(dsi, DSI_DSIPHY_CFG5, 30, 1)) {
1572 DSSERR("CIO SCP Clock domain not coming out of reset.\n");
1574 goto err_scp_clk_dom;
1577 r = dsi_set_lane_config(dsi);
1579 goto err_scp_clk_dom;
1581 /* set TX STOP MODE timer to maximum for this operation */
1582 l = dsi_read_reg(dsi, DSI_TIMING1);
1583 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
1584 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
1585 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
1586 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
1587 dsi_write_reg(dsi, DSI_TIMING1, l);
1589 r = dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_ON);
1593 if (!wait_for_bit_change(dsi, DSI_COMPLEXIO_CFG1, 29, 1)) {
1594 DSSERR("CIO PWR clock domain not coming out of reset.\n");
1596 goto err_cio_pwr_dom;
1599 dsi_if_enable(dsi, true);
1600 dsi_if_enable(dsi, false);
1601 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1603 r = dsi_cio_wait_tx_clk_esc_reset(dsi);
1605 goto err_tx_clk_esc_rst;
1607 /* FORCE_TX_STOP_MODE_IO */
1608 REG_FLD_MOD(dsi, DSI_TIMING1, 0, 15, 15);
1610 dsi_cio_timings(dsi);
1612 /* DDR_CLK_ALWAYS_ON */
1613 REG_FLD_MOD(dsi, DSI_CLK_CTRL,
1614 !(dsi->dsidev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS),
1617 DSSDBG("CIO init done\n");
1622 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 20, 20); /* LP_CLK_ENABLE */
1624 dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_OFF);
1627 dsi_disable_scp_clk(dsi);
1628 dsi_disable_pads(dsi);
1632 static void dsi_cio_uninit(struct dsi_data *dsi)
1634 /* DDR_CLK_ALWAYS_ON */
1635 REG_FLD_MOD(dsi, DSI_CLK_CTRL, 0, 13, 13);
1637 dsi_cio_power(dsi, DSI_COMPLEXIO_POWER_OFF);
1638 dsi_disable_scp_clk(dsi);
1639 dsi_disable_pads(dsi);
1642 static void dsi_config_tx_fifo(struct dsi_data *dsi,
1643 enum fifo_size size1, enum fifo_size size2,
1644 enum fifo_size size3, enum fifo_size size4)
1650 dsi->vc[0].tx_fifo_size = size1;
1651 dsi->vc[1].tx_fifo_size = size2;
1652 dsi->vc[2].tx_fifo_size = size3;
1653 dsi->vc[3].tx_fifo_size = size4;
1655 for (i = 0; i < 4; i++) {
1657 int size = dsi->vc[i].tx_fifo_size;
1659 if (add + size > 4) {
1660 DSSERR("Illegal FIFO configuration\n");
1665 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1667 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
1671 dsi_write_reg(dsi, DSI_TX_FIFO_VC_SIZE, r);
1674 static void dsi_config_rx_fifo(struct dsi_data *dsi,
1675 enum fifo_size size1, enum fifo_size size2,
1676 enum fifo_size size3, enum fifo_size size4)
1682 dsi->vc[0].rx_fifo_size = size1;
1683 dsi->vc[1].rx_fifo_size = size2;
1684 dsi->vc[2].rx_fifo_size = size3;
1685 dsi->vc[3].rx_fifo_size = size4;
1687 for (i = 0; i < 4; i++) {
1689 int size = dsi->vc[i].rx_fifo_size;
1691 if (add + size > 4) {
1692 DSSERR("Illegal FIFO configuration\n");
1697 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1699 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
1703 dsi_write_reg(dsi, DSI_RX_FIFO_VC_SIZE, r);
1706 static int dsi_force_tx_stop_mode_io(struct dsi_data *dsi)
1710 r = dsi_read_reg(dsi, DSI_TIMING1);
1711 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
1712 dsi_write_reg(dsi, DSI_TIMING1, r);
1714 if (!wait_for_bit_change(dsi, DSI_TIMING1, 15, 0)) {
1715 DSSERR("TX_STOP bit not going down\n");
1722 static bool dsi_vc_is_enabled(struct dsi_data *dsi, int vc)
1724 return REG_GET(dsi, DSI_VC_CTRL(vc), 0, 0);
1727 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
1729 struct dsi_packet_sent_handler_data *vp_data =
1730 (struct dsi_packet_sent_handler_data *) data;
1731 struct dsi_data *dsi = vp_data->dsi;
1732 const int vc = dsi->update_vc;
1733 u8 bit = dsi->te_enabled ? 30 : 31;
1735 if (REG_GET(dsi, DSI_VC_TE(vc), bit, bit) == 0)
1736 complete(vp_data->completion);
1739 static int dsi_sync_vc_vp(struct dsi_data *dsi, int vc)
1741 DECLARE_COMPLETION_ONSTACK(completion);
1742 struct dsi_packet_sent_handler_data vp_data = {
1744 .completion = &completion
1749 bit = dsi->te_enabled ? 30 : 31;
1751 r = dsi_register_isr_vc(dsi, vc, dsi_packet_sent_handler_vp,
1752 &vp_data, DSI_VC_IRQ_PACKET_SENT);
1756 /* Wait for completion only if TE_EN/TE_START is still set */
1757 if (REG_GET(dsi, DSI_VC_TE(vc), bit, bit)) {
1758 if (wait_for_completion_timeout(&completion,
1759 msecs_to_jiffies(10)) == 0) {
1760 DSSERR("Failed to complete previous frame transfer\n");
1766 dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_vp,
1767 &vp_data, DSI_VC_IRQ_PACKET_SENT);
1771 dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_vp,
1772 &vp_data, DSI_VC_IRQ_PACKET_SENT);
1777 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
1779 struct dsi_packet_sent_handler_data *l4_data =
1780 (struct dsi_packet_sent_handler_data *) data;
1781 struct dsi_data *dsi = l4_data->dsi;
1782 const int vc = dsi->update_vc;
1784 if (REG_GET(dsi, DSI_VC_CTRL(vc), 5, 5) == 0)
1785 complete(l4_data->completion);
1788 static int dsi_sync_vc_l4(struct dsi_data *dsi, int vc)
1790 DECLARE_COMPLETION_ONSTACK(completion);
1791 struct dsi_packet_sent_handler_data l4_data = {
1793 .completion = &completion
1797 r = dsi_register_isr_vc(dsi, vc, dsi_packet_sent_handler_l4,
1798 &l4_data, DSI_VC_IRQ_PACKET_SENT);
1802 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
1803 if (REG_GET(dsi, DSI_VC_CTRL(vc), 5, 5)) {
1804 if (wait_for_completion_timeout(&completion,
1805 msecs_to_jiffies(10)) == 0) {
1806 DSSERR("Failed to complete previous l4 transfer\n");
1812 dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_l4,
1813 &l4_data, DSI_VC_IRQ_PACKET_SENT);
1817 dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_l4,
1818 &l4_data, DSI_VC_IRQ_PACKET_SENT);
1823 static int dsi_sync_vc(struct dsi_data *dsi, int vc)
1825 WARN_ON(!dsi_bus_is_locked(dsi));
1827 WARN_ON(in_interrupt());
1829 if (!dsi_vc_is_enabled(dsi, vc))
1832 switch (dsi->vc[vc].source) {
1833 case DSI_VC_SOURCE_VP:
1834 return dsi_sync_vc_vp(dsi, vc);
1835 case DSI_VC_SOURCE_L4:
1836 return dsi_sync_vc_l4(dsi, vc);
1843 static int dsi_vc_enable(struct dsi_data *dsi, int vc, bool enable)
1845 DSSDBG("dsi_vc_enable vc %d, enable %d\n",
1848 enable = enable ? 1 : 0;
1850 REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), enable, 0, 0);
1852 if (!wait_for_bit_change(dsi, DSI_VC_CTRL(vc), 0, enable)) {
1853 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
1860 static void dsi_vc_initial_config(struct dsi_data *dsi, int vc)
1864 DSSDBG("Initial config of VC %d", vc);
1866 r = dsi_read_reg(dsi, DSI_VC_CTRL(vc));
1868 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
1869 DSSERR("VC(%d) busy when trying to configure it!\n",
1872 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
1873 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
1874 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
1875 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
1876 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
1877 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
1878 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
1879 if (dsi->data->quirks & DSI_QUIRK_VC_OCP_WIDTH)
1880 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
1882 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
1883 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
1885 dsi_write_reg(dsi, DSI_VC_CTRL(vc), r);
1887 dsi->vc[vc].source = DSI_VC_SOURCE_L4;
1890 static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int vc,
1893 struct dsi_data *dsi = to_dsi_data(dssdev);
1895 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", vc, enable);
1897 if (REG_GET(dsi, DSI_VC_CTRL(vc), 9, 9) == enable)
1900 WARN_ON(!dsi_bus_is_locked(dsi));
1902 dsi_vc_enable(dsi, vc, 0);
1903 dsi_if_enable(dsi, 0);
1905 REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), enable, 9, 9);
1907 dsi_vc_enable(dsi, vc, 1);
1908 dsi_if_enable(dsi, 1);
1910 dsi_force_tx_stop_mode_io(dsi);
1913 static void dsi_vc_flush_long_data(struct dsi_data *dsi, int vc)
1915 while (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
1917 val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc));
1918 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
1922 (val >> 24) & 0xff);
1926 static void dsi_show_rx_ack_with_err(u16 err)
1928 DSSERR("\tACK with ERROR (%#x):\n", err);
1930 DSSERR("\t\tSoT Error\n");
1932 DSSERR("\t\tSoT Sync Error\n");
1934 DSSERR("\t\tEoT Sync Error\n");
1936 DSSERR("\t\tEscape Mode Entry Command Error\n");
1938 DSSERR("\t\tLP Transmit Sync Error\n");
1940 DSSERR("\t\tHS Receive Timeout Error\n");
1942 DSSERR("\t\tFalse Control Error\n");
1944 DSSERR("\t\t(reserved7)\n");
1946 DSSERR("\t\tECC Error, single-bit (corrected)\n");
1948 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
1949 if (err & (1 << 10))
1950 DSSERR("\t\tChecksum Error\n");
1951 if (err & (1 << 11))
1952 DSSERR("\t\tData type not recognized\n");
1953 if (err & (1 << 12))
1954 DSSERR("\t\tInvalid VC ID\n");
1955 if (err & (1 << 13))
1956 DSSERR("\t\tInvalid Transmission Length\n");
1957 if (err & (1 << 14))
1958 DSSERR("\t\t(reserved14)\n");
1959 if (err & (1 << 15))
1960 DSSERR("\t\tDSI Protocol Violation\n");
1963 static u16 dsi_vc_flush_receive_data(struct dsi_data *dsi, int vc)
1965 /* RX_FIFO_NOT_EMPTY */
1966 while (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
1969 val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc));
1970 DSSERR("\trawval %#08x\n", val);
1971 dt = FLD_GET(val, 5, 0);
1972 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
1973 u16 err = FLD_GET(val, 23, 8);
1974 dsi_show_rx_ack_with_err(err);
1975 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE) {
1976 DSSERR("\tDCS short response, 1 byte: %#x\n",
1977 FLD_GET(val, 23, 8));
1978 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE) {
1979 DSSERR("\tDCS short response, 2 byte: %#x\n",
1980 FLD_GET(val, 23, 8));
1981 } else if (dt == MIPI_DSI_RX_DCS_LONG_READ_RESPONSE) {
1982 DSSERR("\tDCS long response, len %d\n",
1983 FLD_GET(val, 23, 8));
1984 dsi_vc_flush_long_data(dsi, vc);
1986 DSSERR("\tunknown datatype 0x%02x\n", dt);
1992 static int dsi_vc_send_bta(struct dsi_data *dsi, int vc)
1994 if (dsi->debug_write || dsi->debug_read)
1995 DSSDBG("dsi_vc_send_bta %d\n", vc);
1997 WARN_ON(!dsi_bus_is_locked(dsi));
1999 /* RX_FIFO_NOT_EMPTY */
2000 if (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
2001 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2002 dsi_vc_flush_receive_data(dsi, vc);
2005 REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 1, 6, 6); /* BTA_EN */
2007 /* flush posted write */
2008 dsi_read_reg(dsi, DSI_VC_CTRL(vc));
2013 static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int vc)
2015 struct dsi_data *dsi = to_dsi_data(dssdev);
2016 DECLARE_COMPLETION_ONSTACK(completion);
2020 r = dsi_register_isr_vc(dsi, vc, dsi_completion_handler,
2021 &completion, DSI_VC_IRQ_BTA);
2025 r = dsi_register_isr(dsi, dsi_completion_handler, &completion,
2026 DSI_IRQ_ERROR_MASK);
2030 r = dsi_vc_send_bta(dsi, vc);
2034 if (wait_for_completion_timeout(&completion,
2035 msecs_to_jiffies(500)) == 0) {
2036 DSSERR("Failed to receive BTA\n");
2041 err = dsi_get_errors(dsi);
2043 DSSERR("Error while sending BTA: %x\n", err);
2048 dsi_unregister_isr(dsi, dsi_completion_handler, &completion,
2049 DSI_IRQ_ERROR_MASK);
2051 dsi_unregister_isr_vc(dsi, vc, dsi_completion_handler,
2052 &completion, DSI_VC_IRQ_BTA);
2057 static inline void dsi_vc_write_long_header(struct dsi_data *dsi, int vc,
2058 int channel, u8 data_type, u16 len,
2064 WARN_ON(!dsi_bus_is_locked(dsi));
2066 data_id = data_type | channel << 6;
2068 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2069 FLD_VAL(ecc, 31, 24);
2071 dsi_write_reg(dsi, DSI_VC_LONG_PACKET_HEADER(vc), val);
2074 static inline void dsi_vc_write_long_payload(struct dsi_data *dsi, int vc,
2075 u8 b1, u8 b2, u8 b3, u8 b4)
2079 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2081 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2082 b1, b2, b3, b4, val); */
2084 dsi_write_reg(dsi, DSI_VC_LONG_PACKET_PAYLOAD(vc), val);
2087 static int dsi_vc_send_long(struct dsi_data *dsi, int vc,
2088 const struct mipi_dsi_msg *msg)
2096 if (dsi->debug_write)
2097 DSSDBG("dsi_vc_send_long, %d bytes\n", msg->tx_len);
2100 if (dsi->vc[vc].tx_fifo_size * 32 * 4 < msg->tx_len + 4) {
2101 DSSERR("unable to send long packet: packet too long.\n");
2105 dsi_vc_write_long_header(dsi, vc, msg->channel, msg->type, msg->tx_len, 0);
2108 for (i = 0; i < msg->tx_len >> 2; i++) {
2109 if (dsi->debug_write)
2110 DSSDBG("\tsending full packet %d\n", i);
2117 dsi_vc_write_long_payload(dsi, vc, b1, b2, b3, b4);
2120 i = msg->tx_len % 4;
2122 b1 = 0; b2 = 0; b3 = 0;
2124 if (dsi->debug_write)
2125 DSSDBG("\tsending remainder bytes %d\n", i);
2142 dsi_vc_write_long_payload(dsi, vc, b1, b2, b3, 0);
2148 static int dsi_vc_send_short(struct dsi_data *dsi, int vc,
2149 const struct mipi_dsi_msg *msg)
2151 struct mipi_dsi_packet pkt;
2154 r = mipi_dsi_create_packet(&pkt, msg);
2158 WARN_ON(!dsi_bus_is_locked(dsi));
2160 if (dsi->debug_write)
2161 DSSDBG("dsi_vc_send_short(vc%d, dt %#x, b1 %#x, b2 %#x)\n",
2162 vc, msg->type, pkt.header[1], pkt.header[2]);
2164 if (FLD_GET(dsi_read_reg(dsi, DSI_VC_CTRL(vc)), 16, 16)) {
2165 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2169 r = pkt.header[3] << 24 | pkt.header[2] << 16 | pkt.header[1] << 8 |
2172 dsi_write_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc), r);
2177 static int dsi_vc_send_null(struct dsi_data *dsi, int vc, int channel)
2179 const struct mipi_dsi_msg msg = {
2181 .type = MIPI_DSI_NULL_PACKET,
2184 return dsi_vc_send_long(dsi, vc, &msg);
2187 static int dsi_vc_write_common(struct omap_dss_device *dssdev, int vc,
2188 const struct mipi_dsi_msg *msg)
2190 struct dsi_data *dsi = to_dsi_data(dssdev);
2193 if (mipi_dsi_packet_format_is_short(msg->type))
2194 r = dsi_vc_send_short(dsi, vc, msg);
2196 r = dsi_vc_send_long(dsi, vc, msg);
2202 * TODO: we do not always have to do the BTA sync, for example
2203 * we can improve performance by setting the update window
2204 * information without sending BTA sync between the commands.
2205 * In that case we can return early.
2208 r = dsi_vc_send_bta_sync(dssdev, vc);
2210 DSSERR("bta sync failed\n");
2214 /* RX_FIFO_NOT_EMPTY */
2215 if (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
2216 DSSERR("rx fifo not empty after write, dumping data:\n");
2217 dsi_vc_flush_receive_data(dsi, vc);
2224 static int dsi_vc_read_rx_fifo(struct dsi_data *dsi, int vc, u8 *buf,
2225 int buflen, enum dss_dsi_content_type type)
2231 /* RX_FIFO_NOT_EMPTY */
2232 if (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20) == 0) {
2233 DSSERR("RX fifo empty when trying to read.\n");
2238 val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc));
2239 if (dsi->debug_read)
2240 DSSDBG("\theader: %08x\n", val);
2241 dt = FLD_GET(val, 5, 0);
2242 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
2243 u16 err = FLD_GET(val, 23, 8);
2244 dsi_show_rx_ack_with_err(err);
2248 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2249 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE :
2250 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE)) {
2251 u8 data = FLD_GET(val, 15, 8);
2252 if (dsi->debug_read)
2253 DSSDBG("\t%s short response, 1 byte: %02x\n",
2254 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2265 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2266 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE :
2267 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE)) {
2268 u16 data = FLD_GET(val, 23, 8);
2269 if (dsi->debug_read)
2270 DSSDBG("\t%s short response, 2 byte: %04x\n",
2271 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2279 buf[0] = data & 0xff;
2280 buf[1] = (data >> 8) & 0xff;
2283 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ?
2284 MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE :
2285 MIPI_DSI_RX_DCS_LONG_READ_RESPONSE)) {
2287 int len = FLD_GET(val, 23, 8);
2288 if (dsi->debug_read)
2289 DSSDBG("\t%s long response, len %d\n",
2290 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" :
2298 /* two byte checksum ends the packet, not included in len */
2299 for (w = 0; w < len + 2;) {
2301 val = dsi_read_reg(dsi,
2302 DSI_VC_SHORT_PACKET_HEADER(vc));
2303 if (dsi->debug_read)
2304 DSSDBG("\t\t%02x %02x %02x %02x\n",
2308 (val >> 24) & 0xff);
2310 for (b = 0; b < 4; ++b) {
2312 buf[w] = (val >> (b * 8)) & 0xff;
2313 /* we discard the 2 byte checksum */
2320 DSSERR("\tunknown datatype 0x%02x\n", dt);
2326 DSSERR("dsi_vc_read_rx_fifo(vc %d type %s) failed\n", vc,
2327 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : "DCS");
2332 static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int vc,
2333 const struct mipi_dsi_msg *msg)
2335 struct dsi_data *dsi = to_dsi_data(dssdev);
2336 u8 cmd = ((u8 *)msg->tx_buf)[0];
2339 if (dsi->debug_read)
2340 DSSDBG("%s(vc %d, cmd %x)\n", __func__, vc, cmd);
2342 r = dsi_vc_send_short(dsi, vc, msg);
2346 r = dsi_vc_send_bta_sync(dssdev, vc);
2350 r = dsi_vc_read_rx_fifo(dsi, vc, msg->rx_buf, msg->rx_len,
2351 DSS_DSI_CONTENT_DCS);
2355 if (r != msg->rx_len) {
2362 DSSERR("%s(vc %d, cmd 0x%02x) failed\n", __func__, vc, cmd);
2366 static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int vc,
2367 const struct mipi_dsi_msg *msg)
2369 struct dsi_data *dsi = to_dsi_data(dssdev);
2372 r = dsi_vc_send_short(dsi, vc, msg);
2376 r = dsi_vc_send_bta_sync(dssdev, vc);
2380 r = dsi_vc_read_rx_fifo(dsi, vc, msg->rx_buf, msg->rx_len,
2381 DSS_DSI_CONTENT_GENERIC);
2385 if (r != msg->rx_len) {
2392 DSSERR("%s(vc %d, reqlen %d) failed\n", __func__, vc, msg->tx_len);
2396 static void dsi_set_lp_rx_timeout(struct dsi_data *dsi, unsigned int ticks,
2400 unsigned long total_ticks;
2403 BUG_ON(ticks > 0x1fff);
2405 /* ticks in DSI_FCK */
2406 fck = dsi_fclk_rate(dsi);
2408 r = dsi_read_reg(dsi, DSI_TIMING2);
2409 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2410 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2411 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2412 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2413 dsi_write_reg(dsi, DSI_TIMING2, r);
2415 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2417 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2419 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2420 (total_ticks * 1000) / (fck / 1000 / 1000));
2423 static void dsi_set_ta_timeout(struct dsi_data *dsi, unsigned int ticks,
2427 unsigned long total_ticks;
2430 BUG_ON(ticks > 0x1fff);
2432 /* ticks in DSI_FCK */
2433 fck = dsi_fclk_rate(dsi);
2435 r = dsi_read_reg(dsi, DSI_TIMING1);
2436 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2437 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2438 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2439 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2440 dsi_write_reg(dsi, DSI_TIMING1, r);
2442 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2444 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2446 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2447 (total_ticks * 1000) / (fck / 1000 / 1000));
2450 static void dsi_set_stop_state_counter(struct dsi_data *dsi, unsigned int ticks,
2454 unsigned long total_ticks;
2457 BUG_ON(ticks > 0x1fff);
2459 /* ticks in DSI_FCK */
2460 fck = dsi_fclk_rate(dsi);
2462 r = dsi_read_reg(dsi, DSI_TIMING1);
2463 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2464 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
2465 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
2466 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
2467 dsi_write_reg(dsi, DSI_TIMING1, r);
2469 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2471 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
2473 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2474 (total_ticks * 1000) / (fck / 1000 / 1000));
2477 static void dsi_set_hs_tx_timeout(struct dsi_data *dsi, unsigned int ticks,
2481 unsigned long total_ticks;
2484 BUG_ON(ticks > 0x1fff);
2486 /* ticks in TxByteClkHS */
2487 fck = dsi_get_txbyteclkhs(dsi);
2489 r = dsi_read_reg(dsi, DSI_TIMING2);
2490 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
2491 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
2492 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
2493 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
2494 dsi_write_reg(dsi, DSI_TIMING2, r);
2496 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2498 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2500 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2501 (total_ticks * 1000) / (fck / 1000 / 1000));
2504 static void dsi_config_vp_num_line_buffers(struct dsi_data *dsi)
2506 int num_line_buffers;
2508 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
2509 int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
2510 const struct videomode *vm = &dsi->vm;
2512 * Don't use line buffers if width is greater than the video
2513 * port's line buffer size
2515 if (dsi->line_buffer_size <= vm->hactive * bpp / 8)
2516 num_line_buffers = 0;
2518 num_line_buffers = 2;
2520 /* Use maximum number of line buffers in command mode */
2521 num_line_buffers = 2;
2525 REG_FLD_MOD(dsi, DSI_CTRL, num_line_buffers, 13, 12);
2528 static void dsi_config_vp_sync_events(struct dsi_data *dsi)
2533 if (dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE)
2538 r = dsi_read_reg(dsi, DSI_CTRL);
2539 r = FLD_MOD(r, 1, 9, 9); /* VP_DE_POL */
2540 r = FLD_MOD(r, 1, 10, 10); /* VP_HSYNC_POL */
2541 r = FLD_MOD(r, 1, 11, 11); /* VP_VSYNC_POL */
2542 r = FLD_MOD(r, 1, 15, 15); /* VP_VSYNC_START */
2543 r = FLD_MOD(r, sync_end, 16, 16); /* VP_VSYNC_END */
2544 r = FLD_MOD(r, 1, 17, 17); /* VP_HSYNC_START */
2545 r = FLD_MOD(r, sync_end, 18, 18); /* VP_HSYNC_END */
2546 dsi_write_reg(dsi, DSI_CTRL, r);
2549 static void dsi_config_blanking_modes(struct dsi_data *dsi)
2551 int blanking_mode = dsi->vm_timings.blanking_mode;
2552 int hfp_blanking_mode = dsi->vm_timings.hfp_blanking_mode;
2553 int hbp_blanking_mode = dsi->vm_timings.hbp_blanking_mode;
2554 int hsa_blanking_mode = dsi->vm_timings.hsa_blanking_mode;
2558 * 0 = TX FIFO packets sent or LPS in corresponding blanking periods
2559 * 1 = Long blanking packets are sent in corresponding blanking periods
2561 r = dsi_read_reg(dsi, DSI_CTRL);
2562 r = FLD_MOD(r, blanking_mode, 20, 20); /* BLANKING_MODE */
2563 r = FLD_MOD(r, hfp_blanking_mode, 21, 21); /* HFP_BLANKING */
2564 r = FLD_MOD(r, hbp_blanking_mode, 22, 22); /* HBP_BLANKING */
2565 r = FLD_MOD(r, hsa_blanking_mode, 23, 23); /* HSA_BLANKING */
2566 dsi_write_reg(dsi, DSI_CTRL, r);
2570 * According to section 'HS Command Mode Interleaving' in OMAP TRM, Scenario 3
2571 * results in maximum transition time for data and clock lanes to enter and
2572 * exit HS mode. Hence, this is the scenario where the least amount of command
2573 * mode data can be interleaved. We program the minimum amount of TXBYTECLKHS
2574 * clock cycles that can be used to interleave command mode data in HS so that
2575 * all scenarios are satisfied.
2577 static int dsi_compute_interleave_hs(int blank, bool ddr_alwon, int enter_hs,
2578 int exit_hs, int exiths_clk, int ddr_pre, int ddr_post)
2583 * If DDR_CLK_ALWAYS_ON is set, we need to consider HS mode transition
2584 * time of data lanes only, if it isn't set, we need to consider HS
2585 * transition time of both data and clock lanes. HS transition time
2586 * of Scenario 3 is considered.
2589 transition = enter_hs + exit_hs + max(enter_hs, 2) + 1;
2592 trans1 = ddr_pre + enter_hs + exit_hs + max(enter_hs, 2) + 1;
2593 trans2 = ddr_pre + enter_hs + exiths_clk + ddr_post + ddr_pre +
2595 transition = max(trans1, trans2);
2598 return blank > transition ? blank - transition : 0;
2602 * According to section 'LP Command Mode Interleaving' in OMAP TRM, Scenario 1
2603 * results in maximum transition time for data lanes to enter and exit LP mode.
2604 * Hence, this is the scenario where the least amount of command mode data can
2605 * be interleaved. We program the minimum amount of bytes that can be
2606 * interleaved in LP so that all scenarios are satisfied.
2608 static int dsi_compute_interleave_lp(int blank, int enter_hs, int exit_hs,
2609 int lp_clk_div, int tdsi_fclk)
2611 int trans_lp; /* time required for a LP transition, in TXBYTECLKHS */
2612 int tlp_avail; /* time left for interleaving commands, in CLKIN4DDR */
2613 int ttxclkesc; /* period of LP transmit escape clock, in CLKIN4DDR */
2614 int thsbyte_clk = 16; /* Period of TXBYTECLKHS clock, in CLKIN4DDR */
2615 int lp_inter; /* cmd mode data that can be interleaved, in bytes */
2617 /* maximum LP transition time according to Scenario 1 */
2618 trans_lp = exit_hs + max(enter_hs, 2) + 1;
2620 /* CLKIN4DDR = 16 * TXBYTECLKHS */
2621 tlp_avail = thsbyte_clk * (blank - trans_lp);
2623 ttxclkesc = tdsi_fclk * lp_clk_div;
2625 lp_inter = ((tlp_avail - 8 * thsbyte_clk - 5 * tdsi_fclk) / ttxclkesc -
2628 return max(lp_inter, 0);
2631 static void dsi_config_cmd_mode_interleaving(struct dsi_data *dsi)
2634 int hfp_blanking_mode, hbp_blanking_mode, hsa_blanking_mode;
2635 int hsa, hfp, hbp, width_bytes, bllp, lp_clk_div;
2636 int ddr_clk_pre, ddr_clk_post, enter_hs_mode_lat, exit_hs_mode_lat;
2637 int tclk_trail, ths_exit, exiths_clk;
2639 const struct videomode *vm = &dsi->vm;
2640 int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
2641 int ndl = dsi->num_lanes_used - 1;
2642 int dsi_fclk_hsdiv = dsi->user_dsi_cinfo.mX[HSDIV_DSI] + 1;
2643 int hsa_interleave_hs = 0, hsa_interleave_lp = 0;
2644 int hfp_interleave_hs = 0, hfp_interleave_lp = 0;
2645 int hbp_interleave_hs = 0, hbp_interleave_lp = 0;
2646 int bl_interleave_hs = 0, bl_interleave_lp = 0;
2649 r = dsi_read_reg(dsi, DSI_CTRL);
2650 blanking_mode = FLD_GET(r, 20, 20);
2651 hfp_blanking_mode = FLD_GET(r, 21, 21);
2652 hbp_blanking_mode = FLD_GET(r, 22, 22);
2653 hsa_blanking_mode = FLD_GET(r, 23, 23);
2655 r = dsi_read_reg(dsi, DSI_VM_TIMING1);
2656 hbp = FLD_GET(r, 11, 0);
2657 hfp = FLD_GET(r, 23, 12);
2658 hsa = FLD_GET(r, 31, 24);
2660 r = dsi_read_reg(dsi, DSI_CLK_TIMING);
2661 ddr_clk_post = FLD_GET(r, 7, 0);
2662 ddr_clk_pre = FLD_GET(r, 15, 8);
2664 r = dsi_read_reg(dsi, DSI_VM_TIMING7);
2665 exit_hs_mode_lat = FLD_GET(r, 15, 0);
2666 enter_hs_mode_lat = FLD_GET(r, 31, 16);
2668 r = dsi_read_reg(dsi, DSI_CLK_CTRL);
2669 lp_clk_div = FLD_GET(r, 12, 0);
2670 ddr_alwon = FLD_GET(r, 13, 13);
2672 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG0);
2673 ths_exit = FLD_GET(r, 7, 0);
2675 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG1);
2676 tclk_trail = FLD_GET(r, 15, 8);
2678 exiths_clk = ths_exit + tclk_trail;
2680 width_bytes = DIV_ROUND_UP(vm->hactive * bpp, 8);
2681 bllp = hbp + hfp + hsa + DIV_ROUND_UP(width_bytes + 6, ndl);
2683 if (!hsa_blanking_mode) {
2684 hsa_interleave_hs = dsi_compute_interleave_hs(hsa, ddr_alwon,
2685 enter_hs_mode_lat, exit_hs_mode_lat,
2686 exiths_clk, ddr_clk_pre, ddr_clk_post);
2687 hsa_interleave_lp = dsi_compute_interleave_lp(hsa,
2688 enter_hs_mode_lat, exit_hs_mode_lat,
2689 lp_clk_div, dsi_fclk_hsdiv);
2692 if (!hfp_blanking_mode) {
2693 hfp_interleave_hs = dsi_compute_interleave_hs(hfp, ddr_alwon,
2694 enter_hs_mode_lat, exit_hs_mode_lat,
2695 exiths_clk, ddr_clk_pre, ddr_clk_post);
2696 hfp_interleave_lp = dsi_compute_interleave_lp(hfp,
2697 enter_hs_mode_lat, exit_hs_mode_lat,
2698 lp_clk_div, dsi_fclk_hsdiv);
2701 if (!hbp_blanking_mode) {
2702 hbp_interleave_hs = dsi_compute_interleave_hs(hbp, ddr_alwon,
2703 enter_hs_mode_lat, exit_hs_mode_lat,
2704 exiths_clk, ddr_clk_pre, ddr_clk_post);
2706 hbp_interleave_lp = dsi_compute_interleave_lp(hbp,
2707 enter_hs_mode_lat, exit_hs_mode_lat,
2708 lp_clk_div, dsi_fclk_hsdiv);
2711 if (!blanking_mode) {
2712 bl_interleave_hs = dsi_compute_interleave_hs(bllp, ddr_alwon,
2713 enter_hs_mode_lat, exit_hs_mode_lat,
2714 exiths_clk, ddr_clk_pre, ddr_clk_post);
2716 bl_interleave_lp = dsi_compute_interleave_lp(bllp,
2717 enter_hs_mode_lat, exit_hs_mode_lat,
2718 lp_clk_div, dsi_fclk_hsdiv);
2721 DSSDBG("DSI HS interleaving(TXBYTECLKHS) HSA %d, HFP %d, HBP %d, BLLP %d\n",
2722 hsa_interleave_hs, hfp_interleave_hs, hbp_interleave_hs,
2725 DSSDBG("DSI LP interleaving(bytes) HSA %d, HFP %d, HBP %d, BLLP %d\n",
2726 hsa_interleave_lp, hfp_interleave_lp, hbp_interleave_lp,
2729 r = dsi_read_reg(dsi, DSI_VM_TIMING4);
2730 r = FLD_MOD(r, hsa_interleave_hs, 23, 16);
2731 r = FLD_MOD(r, hfp_interleave_hs, 15, 8);
2732 r = FLD_MOD(r, hbp_interleave_hs, 7, 0);
2733 dsi_write_reg(dsi, DSI_VM_TIMING4, r);
2735 r = dsi_read_reg(dsi, DSI_VM_TIMING5);
2736 r = FLD_MOD(r, hsa_interleave_lp, 23, 16);
2737 r = FLD_MOD(r, hfp_interleave_lp, 15, 8);
2738 r = FLD_MOD(r, hbp_interleave_lp, 7, 0);
2739 dsi_write_reg(dsi, DSI_VM_TIMING5, r);
2741 r = dsi_read_reg(dsi, DSI_VM_TIMING6);
2742 r = FLD_MOD(r, bl_interleave_hs, 31, 15);
2743 r = FLD_MOD(r, bl_interleave_lp, 16, 0);
2744 dsi_write_reg(dsi, DSI_VM_TIMING6, r);
2747 static int dsi_proto_config(struct dsi_data *dsi)
2752 dsi_config_tx_fifo(dsi, DSI_FIFO_SIZE_32,
2757 dsi_config_rx_fifo(dsi, DSI_FIFO_SIZE_32,
2762 /* XXX what values for the timeouts? */
2763 dsi_set_stop_state_counter(dsi, 0x1000, false, false);
2764 dsi_set_ta_timeout(dsi, 0x1fff, true, true);
2765 dsi_set_lp_rx_timeout(dsi, 0x1fff, true, true);
2766 dsi_set_hs_tx_timeout(dsi, 0x1fff, true, true);
2768 switch (mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt)) {
2783 r = dsi_read_reg(dsi, DSI_CTRL);
2784 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
2785 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
2786 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
2787 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
2788 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
2789 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
2790 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
2791 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
2792 if (!(dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC)) {
2793 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
2794 /* DCS_CMD_CODE, 1=start, 0=continue */
2795 r = FLD_MOD(r, 0, 25, 25);
2798 dsi_write_reg(dsi, DSI_CTRL, r);
2800 dsi_config_vp_num_line_buffers(dsi);
2802 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
2803 dsi_config_vp_sync_events(dsi);
2804 dsi_config_blanking_modes(dsi);
2805 dsi_config_cmd_mode_interleaving(dsi);
2808 dsi_vc_initial_config(dsi, 0);
2809 dsi_vc_initial_config(dsi, 1);
2810 dsi_vc_initial_config(dsi, 2);
2811 dsi_vc_initial_config(dsi, 3);
2816 static void dsi_proto_timings(struct dsi_data *dsi)
2818 unsigned int tlpx, tclk_zero, tclk_prepare;
2819 unsigned int tclk_pre, tclk_post;
2820 unsigned int ths_prepare, ths_prepare_ths_zero, ths_zero;
2821 unsigned int ths_trail, ths_exit;
2822 unsigned int ddr_clk_pre, ddr_clk_post;
2823 unsigned int enter_hs_mode_lat, exit_hs_mode_lat;
2824 unsigned int ths_eot;
2825 int ndl = dsi->num_lanes_used - 1;
2828 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG0);
2829 ths_prepare = FLD_GET(r, 31, 24);
2830 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
2831 ths_zero = ths_prepare_ths_zero - ths_prepare;
2832 ths_trail = FLD_GET(r, 15, 8);
2833 ths_exit = FLD_GET(r, 7, 0);
2835 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG1);
2836 tlpx = FLD_GET(r, 20, 16) * 2;
2837 tclk_zero = FLD_GET(r, 7, 0);
2839 r = dsi_read_reg(dsi, DSI_DSIPHY_CFG2);
2840 tclk_prepare = FLD_GET(r, 7, 0);
2844 /* min 60ns + 52*UI */
2845 tclk_post = ns2ddr(dsi, 60) + 26;
2847 ths_eot = DIV_ROUND_UP(4, ndl);
2849 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
2851 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
2853 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
2854 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
2856 r = dsi_read_reg(dsi, DSI_CLK_TIMING);
2857 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
2858 r = FLD_MOD(r, ddr_clk_post, 7, 0);
2859 dsi_write_reg(dsi, DSI_CLK_TIMING, r);
2861 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
2865 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
2866 DIV_ROUND_UP(ths_prepare, 4) +
2867 DIV_ROUND_UP(ths_zero + 3, 4);
2869 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
2871 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
2872 FLD_VAL(exit_hs_mode_lat, 15, 0);
2873 dsi_write_reg(dsi, DSI_VM_TIMING7, r);
2875 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
2876 enter_hs_mode_lat, exit_hs_mode_lat);
2878 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
2879 /* TODO: Implement a video mode check_timings function */
2880 int hsa = dsi->vm_timings.hsa;
2881 int hfp = dsi->vm_timings.hfp;
2882 int hbp = dsi->vm_timings.hbp;
2883 int vsa = dsi->vm_timings.vsa;
2884 int vfp = dsi->vm_timings.vfp;
2885 int vbp = dsi->vm_timings.vbp;
2886 int window_sync = dsi->vm_timings.window_sync;
2888 const struct videomode *vm = &dsi->vm;
2889 int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
2890 int tl, t_he, width_bytes;
2892 hsync_end = dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE;
2894 ((hsa == 0 && ndl == 3) ? 1 : DIV_ROUND_UP(4, ndl)) : 0;
2896 width_bytes = DIV_ROUND_UP(vm->hactive * bpp, 8);
2898 /* TL = t_HS + HSA + t_HE + HFP + ceil((WC + 6) / NDL) + HBP */
2899 tl = DIV_ROUND_UP(4, ndl) + (hsync_end ? hsa : 0) + t_he + hfp +
2900 DIV_ROUND_UP(width_bytes + 6, ndl) + hbp;
2902 DSSDBG("HBP: %d, HFP: %d, HSA: %d, TL: %d TXBYTECLKHS\n", hbp,
2903 hfp, hsync_end ? hsa : 0, tl);
2904 DSSDBG("VBP: %d, VFP: %d, VSA: %d, VACT: %d lines\n", vbp, vfp,
2907 r = dsi_read_reg(dsi, DSI_VM_TIMING1);
2908 r = FLD_MOD(r, hbp, 11, 0); /* HBP */
2909 r = FLD_MOD(r, hfp, 23, 12); /* HFP */
2910 r = FLD_MOD(r, hsync_end ? hsa : 0, 31, 24); /* HSA */
2911 dsi_write_reg(dsi, DSI_VM_TIMING1, r);
2913 r = dsi_read_reg(dsi, DSI_VM_TIMING2);
2914 r = FLD_MOD(r, vbp, 7, 0); /* VBP */
2915 r = FLD_MOD(r, vfp, 15, 8); /* VFP */
2916 r = FLD_MOD(r, vsa, 23, 16); /* VSA */
2917 r = FLD_MOD(r, window_sync, 27, 24); /* WINDOW_SYNC */
2918 dsi_write_reg(dsi, DSI_VM_TIMING2, r);
2920 r = dsi_read_reg(dsi, DSI_VM_TIMING3);
2921 r = FLD_MOD(r, vm->vactive, 14, 0); /* VACT */
2922 r = FLD_MOD(r, tl, 31, 16); /* TL */
2923 dsi_write_reg(dsi, DSI_VM_TIMING3, r);
2927 static int dsi_configure_pins(struct dsi_data *dsi,
2928 int num_pins, const u32 *pins)
2930 struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
2934 static const enum dsi_lane_function functions[] = {
2942 if (num_pins < 4 || num_pins > dsi->num_lanes_supported * 2
2943 || num_pins % 2 != 0)
2946 for (i = 0; i < DSI_MAX_NR_LANES; ++i)
2947 lanes[i].function = DSI_LANE_UNUSED;
2951 for (i = 0; i < num_pins; i += 2) {
2958 if (dx >= dsi->num_lanes_supported * 2)
2961 if (dy >= dsi->num_lanes_supported * 2)
2976 lanes[lane].function = functions[i / 2];
2977 lanes[lane].polarity = pol;
2981 memcpy(dsi->lanes, lanes, sizeof(dsi->lanes));
2982 dsi->num_lanes_used = num_lanes;
2987 static int dsi_enable_video_mode(struct dsi_data *dsi, int vc)
2989 int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
2993 switch (dsi->pix_fmt) {
2994 case MIPI_DSI_FMT_RGB888:
2995 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
2997 case MIPI_DSI_FMT_RGB666:
2998 data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
3000 case MIPI_DSI_FMT_RGB666_PACKED:
3001 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
3003 case MIPI_DSI_FMT_RGB565:
3004 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
3010 dsi_if_enable(dsi, false);
3011 dsi_vc_enable(dsi, vc, false);
3013 /* MODE, 1 = video mode */
3014 REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 1, 4, 4);
3016 word_count = DIV_ROUND_UP(dsi->vm.hactive * bpp, 8);
3018 dsi_vc_write_long_header(dsi, vc, dsi->dsidev->channel, data_type,
3021 dsi_vc_enable(dsi, vc, true);
3022 dsi_if_enable(dsi, true);
3027 static void dsi_disable_video_mode(struct dsi_data *dsi, int vc)
3029 dsi_if_enable(dsi, false);
3030 dsi_vc_enable(dsi, vc, false);
3032 /* MODE, 0 = command mode */
3033 REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 0, 4, 4);
3035 dsi_vc_enable(dsi, vc, true);
3036 dsi_if_enable(dsi, true);
3039 static void dsi_enable_video_output(struct omap_dss_device *dssdev, int vc)
3041 struct dsi_data *dsi = to_dsi_data(dssdev);
3044 r = dsi_init_dispc(dsi);
3046 dev_err(dsi->dev, "failed to init dispc!\n");
3050 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3051 r = dsi_enable_video_mode(dsi, vc);
3053 goto err_video_mode;
3056 r = dss_mgr_enable(&dsi->output);
3058 goto err_mgr_enable;
3063 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
3064 dsi_if_enable(dsi, false);
3065 dsi_vc_enable(dsi, vc, false);
3068 dsi_uninit_dispc(dsi);
3069 dev_err(dsi->dev, "failed to enable DSI encoder!\n");
3073 static void dsi_disable_video_output(struct omap_dss_device *dssdev, int vc)
3075 struct dsi_data *dsi = to_dsi_data(dssdev);
3077 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE)
3078 dsi_disable_video_mode(dsi, vc);
3080 dss_mgr_disable(&dsi->output);
3082 dsi_uninit_dispc(dsi);
3085 static void dsi_update_screen_dispc(struct dsi_data *dsi)
3087 unsigned int bytespp;
3088 unsigned int bytespl;
3089 unsigned int bytespf;
3090 unsigned int total_len;
3091 unsigned int packet_payload;
3092 unsigned int packet_len;
3095 const unsigned vc = dsi->update_vc;
3096 const unsigned int line_buf_size = dsi->line_buffer_size;
3097 u16 w = dsi->vm.hactive;
3098 u16 h = dsi->vm.vactive;
3100 DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h);
3102 bytespp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) / 8;
3103 bytespl = w * bytespp;
3104 bytespf = bytespl * h;
3106 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3107 * number of lines in a packet. See errata about VP_CLK_RATIO */
3109 if (bytespf < line_buf_size)
3110 packet_payload = bytespf;
3112 packet_payload = (line_buf_size) / bytespl * bytespl;
3114 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3115 total_len = (bytespf / packet_payload) * packet_len;
3117 if (bytespf % packet_payload)
3118 total_len += (bytespf % packet_payload) + 1;
3120 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3121 dsi_write_reg(dsi, DSI_VC_TE(vc), l);
3123 dsi_vc_write_long_header(dsi, vc, dsi->dsidev->channel, MIPI_DSI_DCS_LONG_WRITE,
3126 if (dsi->te_enabled)
3127 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3129 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3130 dsi_write_reg(dsi, DSI_VC_TE(vc), l);
3132 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3133 * because DSS interrupts are not capable of waking up the CPU and the
3134 * framedone interrupt could be delayed for quite a long time. I think
3135 * the same goes for any DSS interrupts, but for some reason I have not
3136 * seen the problem anywhere else than here.
3138 dispc_disable_sidle(dsi->dss->dispc);
3140 dsi_perf_mark_start(dsi);
3142 r = schedule_delayed_work(&dsi->framedone_timeout_work,
3143 msecs_to_jiffies(250));
3146 dss_mgr_start_update(&dsi->output);
3148 if (dsi->te_enabled) {
3149 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3150 * for TE is longer than the timer allows */
3151 REG_FLD_MOD(dsi, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3153 dsi_vc_send_bta(dsi, vc);
3155 #ifdef DSI_CATCH_MISSING_TE
3156 mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250));
3161 #ifdef DSI_CATCH_MISSING_TE
3162 static void dsi_te_timeout(struct timer_list *unused)
3164 DSSERR("TE not received for 250ms!\n");
3168 static void dsi_handle_framedone(struct dsi_data *dsi, int error)
3170 /* SIDLEMODE back to smart-idle */
3171 dispc_enable_sidle(dsi->dss->dispc);
3173 if (dsi->te_enabled) {
3174 /* enable LP_RX_TO again after the TE */
3175 REG_FLD_MOD(dsi, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
3178 dsi_bus_unlock(dsi);
3181 dsi_perf_show(dsi, "DISPC");
3184 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
3186 struct dsi_data *dsi = container_of(work, struct dsi_data,
3187 framedone_timeout_work.work);
3188 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
3189 * 250ms which would conflict with this timeout work. What should be
3190 * done is first cancel the transfer on the HW, and then cancel the
3191 * possibly scheduled framedone work. However, cancelling the transfer
3192 * on the HW is buggy, and would probably require resetting the whole
3195 DSSERR("Framedone not received for 250ms!\n");
3197 dsi_handle_framedone(dsi, -ETIMEDOUT);
3200 static void dsi_framedone_irq_callback(void *data)
3202 struct dsi_data *dsi = data;
3204 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
3205 * turns itself off. However, DSI still has the pixels in its buffers,
3206 * and is sending the data.
3209 cancel_delayed_work(&dsi->framedone_timeout_work);
3211 DSSDBG("Framedone received!\n");
3213 dsi_handle_framedone(dsi, 0);
3216 static int _dsi_update(struct dsi_data *dsi)
3218 dsi_perf_mark_setup(dsi);
3220 #ifdef DSI_PERF_MEASURE
3221 dsi->update_bytes = dsi->vm.hactive * dsi->vm.vactive *
3222 mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) / 8;
3224 dsi_update_screen_dispc(dsi);
3229 static int _dsi_send_nop(struct dsi_data *dsi, int vc, int channel)
3231 const u8 payload[] = { MIPI_DCS_NOP };
3232 const struct mipi_dsi_msg msg = {
3234 .type = MIPI_DSI_DCS_SHORT_WRITE,
3239 WARN_ON(!dsi_bus_is_locked(dsi));
3241 return _omap_dsi_host_transfer(dsi, vc, &msg);
3244 static int dsi_update_channel(struct omap_dss_device *dssdev, int vc)
3246 struct dsi_data *dsi = to_dsi_data(dssdev);
3251 if (!dsi->video_enabled) {
3256 if (dsi->vm.hactive == 0 || dsi->vm.vactive == 0) {
3261 DSSDBG("dsi_update_channel: %d", vc);
3264 * Send NOP between the frames. If we don't send something here, the
3265 * updates stop working. This is probably related to DSI spec stating
3266 * that the DSI host should transition to LP at least once per frame.
3268 r = _dsi_send_nop(dsi, VC_CMD, dsi->dsidev->channel);
3270 DSSWARN("failed to send nop between frames: %d\n", r);
3274 dsi->update_vc = vc;
3276 if (dsi->te_enabled && dsi->te_gpio) {
3277 schedule_delayed_work(&dsi->te_timeout_work,
3278 msecs_to_jiffies(250));
3279 atomic_set(&dsi->do_ext_te_update, 1);
3287 dsi_bus_unlock(dsi);
3291 static int dsi_update_all(struct omap_dss_device *dssdev)
3293 return dsi_update_channel(dssdev, VC_VIDEO);
3298 static int dsi_configure_dispc_clocks(struct dsi_data *dsi)
3300 struct dispc_clock_info dispc_cinfo;
3304 fck = dsi_get_pll_hsdiv_dispc_rate(dsi);
3306 dispc_cinfo.lck_div = dsi->user_dispc_cinfo.lck_div;
3307 dispc_cinfo.pck_div = dsi->user_dispc_cinfo.pck_div;
3309 r = dispc_calc_clock_rates(dsi->dss->dispc, fck, &dispc_cinfo);
3311 DSSERR("Failed to calc dispc clocks\n");
3315 dsi->mgr_config.clock_info = dispc_cinfo;
3320 static int dsi_init_dispc(struct dsi_data *dsi)
3322 enum omap_channel dispc_channel = dsi->output.dispc_channel;
3325 dss_select_lcd_clk_source(dsi->dss, dispc_channel, dsi->module_id == 0 ?
3326 DSS_CLK_SRC_PLL1_1 :
3327 DSS_CLK_SRC_PLL2_1);
3329 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) {
3330 r = dss_mgr_register_framedone_handler(&dsi->output,
3331 dsi_framedone_irq_callback, dsi);
3333 DSSERR("can't register FRAMEDONE handler\n");
3337 dsi->mgr_config.stallmode = true;
3338 dsi->mgr_config.fifohandcheck = true;
3340 dsi->mgr_config.stallmode = false;
3341 dsi->mgr_config.fifohandcheck = false;
3344 r = dsi_configure_dispc_clocks(dsi);
3348 dsi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
3349 dsi->mgr_config.video_port_width =
3350 mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
3351 dsi->mgr_config.lcden_sig_polarity = 0;
3353 dss_mgr_set_lcd_config(&dsi->output, &dsi->mgr_config);
3357 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
3358 dss_mgr_unregister_framedone_handler(&dsi->output,
3359 dsi_framedone_irq_callback, dsi);
3361 dss_select_lcd_clk_source(dsi->dss, dispc_channel, DSS_CLK_SRC_FCK);
3365 static void dsi_uninit_dispc(struct dsi_data *dsi)
3367 enum omap_channel dispc_channel = dsi->output.dispc_channel;
3369 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE)
3370 dss_mgr_unregister_framedone_handler(&dsi->output,
3371 dsi_framedone_irq_callback, dsi);
3373 dss_select_lcd_clk_source(dsi->dss, dispc_channel, DSS_CLK_SRC_FCK);
3376 static int dsi_configure_dsi_clocks(struct dsi_data *dsi)
3378 struct dss_pll_clock_info cinfo;
3381 cinfo = dsi->user_dsi_cinfo;
3383 r = dss_pll_set_config(&dsi->pll, &cinfo);
3385 DSSERR("Failed to set dsi clocks\n");
3392 static void dsi_setup_dsi_vcs(struct dsi_data *dsi)
3394 /* Setup VC_CMD for LP and cpu transfers */
3395 REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_CMD), 0, 9, 9); /* LP */
3397 REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_CMD), 0, 1, 1); /* SOURCE_L4 */
3398 dsi->vc[VC_CMD].source = DSI_VC_SOURCE_L4;
3400 /* Setup VC_VIDEO for HS and dispc transfers */
3401 REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_VIDEO), 1, 9, 9); /* HS */
3403 REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_VIDEO), 1, 1, 1); /* SOURCE_VP */
3404 dsi->vc[VC_VIDEO].source = DSI_VC_SOURCE_VP;
3406 if ((dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC) &&
3407 !(dsi->dsidev->mode_flags & MIPI_DSI_MODE_VIDEO))
3408 REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_VIDEO), 1, 30, 30); /* DCS_CMD_ENABLE */
3410 dsi_vc_enable(dsi, VC_CMD, 1);
3411 dsi_vc_enable(dsi, VC_VIDEO, 1);
3413 dsi_if_enable(dsi, 1);
3415 dsi_force_tx_stop_mode_io(dsi);
3417 /* start the DDR clock by sending a NULL packet */
3418 if (!(dsi->dsidev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
3419 dsi_vc_send_null(dsi, VC_CMD, dsi->dsidev->channel);
3422 static int dsi_init_dsi(struct dsi_data *dsi)
3426 r = dss_pll_enable(&dsi->pll);
3430 r = dsi_configure_dsi_clocks(dsi);
3434 dss_select_dsi_clk_source(dsi->dss, dsi->module_id,
3435 dsi->module_id == 0 ?
3436 DSS_CLK_SRC_PLL1_2 : DSS_CLK_SRC_PLL2_2);
3440 if (!dsi->vdds_dsi_enabled) {
3441 r = regulator_enable(dsi->vdds_dsi_reg);
3445 dsi->vdds_dsi_enabled = true;
3448 r = dsi_cio_init(dsi);
3452 _dsi_print_reset_status(dsi);
3454 dsi_proto_timings(dsi);
3455 dsi_set_lp_clk_divisor(dsi);
3458 _dsi_print_reset_status(dsi);
3460 r = dsi_proto_config(dsi);
3464 dsi_setup_dsi_vcs(dsi);
3468 dsi_cio_uninit(dsi);
3470 regulator_disable(dsi->vdds_dsi_reg);
3471 dsi->vdds_dsi_enabled = false;
3473 dss_select_dsi_clk_source(dsi->dss, dsi->module_id, DSS_CLK_SRC_FCK);
3475 dss_pll_disable(&dsi->pll);
3480 static void dsi_uninit_dsi(struct dsi_data *dsi)
3482 /* disable interface */
3483 dsi_if_enable(dsi, 0);
3484 dsi_vc_enable(dsi, 0, 0);
3485 dsi_vc_enable(dsi, 1, 0);
3486 dsi_vc_enable(dsi, 2, 0);
3487 dsi_vc_enable(dsi, 3, 0);
3489 dss_select_dsi_clk_source(dsi->dss, dsi->module_id, DSS_CLK_SRC_FCK);
3490 dsi_cio_uninit(dsi);
3491 dss_pll_disable(&dsi->pll);
3493 regulator_disable(dsi->vdds_dsi_reg);
3494 dsi->vdds_dsi_enabled = false;
3497 static void dsi_enable(struct dsi_data *dsi)
3501 WARN_ON(!dsi_bus_is_locked(dsi));
3503 if (WARN_ON(dsi->iface_enabled))
3506 mutex_lock(&dsi->lock);
3508 r = dsi_runtime_get(dsi);
3512 _dsi_initialize_irq(dsi);
3514 r = dsi_init_dsi(dsi);
3518 dsi->iface_enabled = true;
3520 mutex_unlock(&dsi->lock);
3525 dsi_runtime_put(dsi);
3527 mutex_unlock(&dsi->lock);
3528 DSSDBG("dsi_enable FAILED\n");
3531 static void dsi_disable(struct dsi_data *dsi)
3533 WARN_ON(!dsi_bus_is_locked(dsi));
3535 if (WARN_ON(!dsi->iface_enabled))
3538 mutex_lock(&dsi->lock);
3540 dsi_sync_vc(dsi, 0);
3541 dsi_sync_vc(dsi, 1);
3542 dsi_sync_vc(dsi, 2);
3543 dsi_sync_vc(dsi, 3);
3545 dsi_uninit_dsi(dsi);
3547 dsi_runtime_put(dsi);
3549 dsi->iface_enabled = false;
3551 mutex_unlock(&dsi->lock);
3554 static int dsi_enable_te(struct dsi_data *dsi, bool enable)
3556 dsi->te_enabled = enable;
3560 enable_irq(dsi->te_irq);
3562 disable_irq(dsi->te_irq);
3568 #ifdef PRINT_VERBOSE_VM_TIMINGS
3569 static void print_dsi_vm(const char *str,
3570 const struct omap_dss_dsi_videomode_timings *t)
3572 unsigned long byteclk = t->hsclk / 4;
3573 int bl, wc, pps, tot;
3575 wc = DIV_ROUND_UP(t->hact * t->bitspp, 8);
3576 pps = DIV_ROUND_UP(wc + 6, t->ndl); /* pixel packet size */
3577 bl = t->hss + t->hsa + t->hse + t->hbp + t->hfp;
3580 #define TO_DSI_T(x) ((u32)div64_u64((u64)x * 1000000000llu, byteclk))
3582 pr_debug("%s bck %lu, %u/%u/%u/%u/%u/%u = %u+%u = %u, "
3583 "%u/%u/%u/%u/%u/%u = %u + %u = %u\n",
3586 t->hss, t->hsa, t->hse, t->hbp, pps, t->hfp,
3602 static void print_dispc_vm(const char *str, const struct videomode *vm)
3604 unsigned long pck = vm->pixelclock;
3608 bl = vm->hsync_len + vm->hback_porch + vm->hfront_porch;
3611 #define TO_DISPC_T(x) ((u32)div64_u64((u64)x * 1000000000llu, pck))
3613 pr_debug("%s pck %lu, %u/%u/%u/%u = %u+%u = %u, "
3614 "%u/%u/%u/%u = %u + %u = %u\n",
3617 vm->hsync_len, vm->hback_porch, hact, vm->hfront_porch,
3619 TO_DISPC_T(vm->hsync_len),
3620 TO_DISPC_T(vm->hback_porch),
3622 TO_DISPC_T(vm->hfront_porch),
3629 /* note: this is not quite accurate */
3630 static void print_dsi_dispc_vm(const char *str,
3631 const struct omap_dss_dsi_videomode_timings *t)
3633 struct videomode vm = { 0 };
3634 unsigned long byteclk = t->hsclk / 4;
3637 int dsi_hact, dsi_htot;
3639 dsi_tput = (u64)byteclk * t->ndl * 8;
3640 pck = (u32)div64_u64(dsi_tput, t->bitspp);
3641 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(t->hact * t->bitspp, 8) + 6, t->ndl);
3642 dsi_htot = t->hss + t->hsa + t->hse + t->hbp + dsi_hact + t->hfp;
3644 vm.pixelclock = pck;
3645 vm.hsync_len = div64_u64((u64)(t->hsa + t->hse) * pck, byteclk);
3646 vm.hback_porch = div64_u64((u64)t->hbp * pck, byteclk);
3647 vm.hfront_porch = div64_u64((u64)t->hfp * pck, byteclk);
3648 vm.hactive = t->hact;
3650 print_dispc_vm(str, &vm);
3652 #endif /* PRINT_VERBOSE_VM_TIMINGS */
3654 static bool dsi_cm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
3655 unsigned long pck, void *data)
3657 struct dsi_clk_calc_ctx *ctx = data;
3658 struct videomode *vm = &ctx->vm;
3660 ctx->dispc_cinfo.lck_div = lckd;
3661 ctx->dispc_cinfo.pck_div = pckd;
3662 ctx->dispc_cinfo.lck = lck;
3663 ctx->dispc_cinfo.pck = pck;
3665 *vm = *ctx->config->vm;
3666 vm->pixelclock = pck;
3667 vm->hactive = ctx->config->vm->hactive;
3668 vm->vactive = ctx->config->vm->vactive;
3669 vm->hsync_len = vm->hfront_porch = vm->hback_porch = vm->vsync_len = 1;
3670 vm->vfront_porch = vm->vback_porch = 0;
3675 static bool dsi_cm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
3678 struct dsi_clk_calc_ctx *ctx = data;
3680 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
3681 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
3683 return dispc_div_calc(ctx->dsi->dss->dispc, dispc,
3684 ctx->req_pck_min, ctx->req_pck_max,
3685 dsi_cm_calc_dispc_cb, ctx);
3688 static bool dsi_cm_calc_pll_cb(int n, int m, unsigned long fint,
3689 unsigned long clkdco, void *data)
3691 struct dsi_clk_calc_ctx *ctx = data;
3692 struct dsi_data *dsi = ctx->dsi;
3694 ctx->dsi_cinfo.n = n;
3695 ctx->dsi_cinfo.m = m;
3696 ctx->dsi_cinfo.fint = fint;
3697 ctx->dsi_cinfo.clkdco = clkdco;
3699 return dss_pll_hsdiv_calc_a(ctx->pll, clkdco, ctx->req_pck_min,
3700 dsi->data->max_fck_freq,
3701 dsi_cm_calc_hsdiv_cb, ctx);
3704 static bool dsi_cm_calc(struct dsi_data *dsi,
3705 const struct omap_dss_dsi_config *cfg,
3706 struct dsi_clk_calc_ctx *ctx)
3708 unsigned long clkin;
3710 unsigned long pll_min, pll_max;
3711 unsigned long pck, txbyteclk;
3713 clkin = clk_get_rate(dsi->pll.clkin);
3714 bitspp = mipi_dsi_pixel_format_to_bpp(cfg->pixel_format);
3715 ndl = dsi->num_lanes_used - 1;
3718 * Here we should calculate minimum txbyteclk to be able to send the
3719 * frame in time, and also to handle TE. That's not very simple, though,
3720 * especially as we go to LP between each pixel packet due to HW
3721 * "feature". So let's just estimate very roughly and multiply by 1.5.
3723 pck = cfg->vm->pixelclock;
3725 txbyteclk = pck * bitspp / 8 / ndl;
3727 memset(ctx, 0, sizeof(*ctx));
3729 ctx->pll = &dsi->pll;
3731 ctx->req_pck_min = pck;
3732 ctx->req_pck_nom = pck;
3733 ctx->req_pck_max = pck * 3 / 2;
3735 pll_min = max(cfg->hs_clk_min * 4, txbyteclk * 4 * 4);
3736 pll_max = cfg->hs_clk_max * 4;
3738 return dss_pll_calc_a(ctx->pll, clkin,
3740 dsi_cm_calc_pll_cb, ctx);
3743 static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx)
3745 struct dsi_data *dsi = ctx->dsi;
3746 const struct omap_dss_dsi_config *cfg = ctx->config;
3747 int bitspp = mipi_dsi_pixel_format_to_bpp(cfg->pixel_format);
3748 int ndl = dsi->num_lanes_used - 1;
3749 unsigned long hsclk = ctx->dsi_cinfo.clkdco / 4;
3750 unsigned long byteclk = hsclk / 4;
3752 unsigned long dispc_pck, req_pck_min, req_pck_nom, req_pck_max;
3754 int panel_htot, panel_hbl; /* pixels */
3755 int dispc_htot, dispc_hbl; /* pixels */
3756 int dsi_htot, dsi_hact, dsi_hbl, hss, hse; /* byteclks */
3758 const struct videomode *req_vm;
3759 struct videomode *dispc_vm;
3760 struct omap_dss_dsi_videomode_timings *dsi_vm;
3761 u64 dsi_tput, dispc_tput;
3763 dsi_tput = (u64)byteclk * ndl * 8;
3766 req_pck_min = ctx->req_pck_min;
3767 req_pck_max = ctx->req_pck_max;
3768 req_pck_nom = ctx->req_pck_nom;
3770 dispc_pck = ctx->dispc_cinfo.pck;
3771 dispc_tput = (u64)dispc_pck * bitspp;
3773 xres = req_vm->hactive;
3775 panel_hbl = req_vm->hfront_porch + req_vm->hback_porch +
3777 panel_htot = xres + panel_hbl;
3779 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(xres * bitspp, 8) + 6, ndl);
3782 * When there are no line buffers, DISPC and DSI must have the
3783 * same tput. Otherwise DISPC tput needs to be higher than DSI's.
3785 if (dsi->line_buffer_size < xres * bitspp / 8) {
3786 if (dispc_tput != dsi_tput)
3789 if (dispc_tput < dsi_tput)
3793 /* DSI tput must be over the min requirement */
3794 if (dsi_tput < (u64)bitspp * req_pck_min)
3797 /* When non-burst mode, DSI tput must be below max requirement. */
3798 if (cfg->trans_mode != OMAP_DSS_DSI_BURST_MODE) {
3799 if (dsi_tput > (u64)bitspp * req_pck_max)
3803 hss = DIV_ROUND_UP(4, ndl);
3805 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
3806 if (ndl == 3 && req_vm->hsync_len == 0)
3809 hse = DIV_ROUND_UP(4, ndl);
3814 /* DSI htot to match the panel's nominal pck */
3815 dsi_htot = div64_u64((u64)panel_htot * byteclk, req_pck_nom);
3817 /* fail if there would be no time for blanking */
3818 if (dsi_htot < hss + hse + dsi_hact)
3821 /* total DSI blanking needed to achieve panel's TL */
3822 dsi_hbl = dsi_htot - dsi_hact;
3824 /* DISPC htot to match the DSI TL */
3825 dispc_htot = div64_u64((u64)dsi_htot * dispc_pck, byteclk);
3827 /* verify that the DSI and DISPC TLs are the same */
3828 if ((u64)dsi_htot * dispc_pck != (u64)dispc_htot * byteclk)
3831 dispc_hbl = dispc_htot - xres;
3833 /* setup DSI videomode */
3835 dsi_vm = &ctx->dsi_vm;
3836 memset(dsi_vm, 0, sizeof(*dsi_vm));
3838 dsi_vm->hsclk = hsclk;
3841 dsi_vm->bitspp = bitspp;
3843 if (cfg->trans_mode != OMAP_DSS_DSI_PULSE_MODE) {
3845 } else if (ndl == 3 && req_vm->hsync_len == 0) {
3848 hsa = div64_u64((u64)req_vm->hsync_len * byteclk, req_pck_nom);
3849 hsa = max(hsa - hse, 1);
3852 hbp = div64_u64((u64)req_vm->hback_porch * byteclk, req_pck_nom);
3855 hfp = dsi_hbl - (hss + hsa + hse + hbp);
3858 /* we need to take cycles from hbp */
3861 hbp = max(hbp - t, 1);
3862 hfp = dsi_hbl - (hss + hsa + hse + hbp);
3864 if (hfp < 1 && hsa > 0) {
3865 /* we need to take cycles from hsa */
3867 hsa = max(hsa - t, 1);
3868 hfp = dsi_hbl - (hss + hsa + hse + hbp);
3879 dsi_vm->hact = xres;
3882 dsi_vm->vsa = req_vm->vsync_len;
3883 dsi_vm->vbp = req_vm->vback_porch;
3884 dsi_vm->vact = req_vm->vactive;
3885 dsi_vm->vfp = req_vm->vfront_porch;
3887 dsi_vm->trans_mode = cfg->trans_mode;
3889 dsi_vm->blanking_mode = 0;
3890 dsi_vm->hsa_blanking_mode = 1;
3891 dsi_vm->hfp_blanking_mode = 1;
3892 dsi_vm->hbp_blanking_mode = 1;
3894 dsi_vm->window_sync = 4;
3896 /* setup DISPC videomode */
3898 dispc_vm = &ctx->vm;
3899 *dispc_vm = *req_vm;
3900 dispc_vm->pixelclock = dispc_pck;
3902 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) {
3903 hsa = div64_u64((u64)req_vm->hsync_len * dispc_pck,
3910 hbp = div64_u64((u64)req_vm->hback_porch * dispc_pck, req_pck_nom);
3913 hfp = dispc_hbl - hsa - hbp;
3916 /* we need to take cycles from hbp */
3919 hbp = max(hbp - t, 1);
3920 hfp = dispc_hbl - hsa - hbp;
3923 /* we need to take cycles from hsa */
3925 hsa = max(hsa - t, 1);
3926 hfp = dispc_hbl - hsa - hbp;
3933 dispc_vm->hfront_porch = hfp;
3934 dispc_vm->hsync_len = hsa;
3935 dispc_vm->hback_porch = hbp;
3941 static bool dsi_vm_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
3942 unsigned long pck, void *data)
3944 struct dsi_clk_calc_ctx *ctx = data;
3946 ctx->dispc_cinfo.lck_div = lckd;
3947 ctx->dispc_cinfo.pck_div = pckd;
3948 ctx->dispc_cinfo.lck = lck;
3949 ctx->dispc_cinfo.pck = pck;
3951 if (dsi_vm_calc_blanking(ctx) == false)
3954 #ifdef PRINT_VERBOSE_VM_TIMINGS
3955 print_dispc_vm("dispc", &ctx->vm);
3956 print_dsi_vm("dsi ", &ctx->dsi_vm);
3957 print_dispc_vm("req ", ctx->config->vm);
3958 print_dsi_dispc_vm("act ", &ctx->dsi_vm);
3964 static bool dsi_vm_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
3967 struct dsi_clk_calc_ctx *ctx = data;
3968 unsigned long pck_max;
3970 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc;
3971 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc;
3974 * In burst mode we can let the dispc pck be arbitrarily high, but it
3975 * limits our scaling abilities. So for now, don't aim too high.
3978 if (ctx->config->trans_mode == OMAP_DSS_DSI_BURST_MODE)
3979 pck_max = ctx->req_pck_max + 10000000;
3981 pck_max = ctx->req_pck_max;
3983 return dispc_div_calc(ctx->dsi->dss->dispc, dispc,
3984 ctx->req_pck_min, pck_max,
3985 dsi_vm_calc_dispc_cb, ctx);
3988 static bool dsi_vm_calc_pll_cb(int n, int m, unsigned long fint,
3989 unsigned long clkdco, void *data)
3991 struct dsi_clk_calc_ctx *ctx = data;
3992 struct dsi_data *dsi = ctx->dsi;
3994 ctx->dsi_cinfo.n = n;
3995 ctx->dsi_cinfo.m = m;
3996 ctx->dsi_cinfo.fint = fint;
3997 ctx->dsi_cinfo.clkdco = clkdco;
3999 return dss_pll_hsdiv_calc_a(ctx->pll, clkdco, ctx->req_pck_min,
4000 dsi->data->max_fck_freq,
4001 dsi_vm_calc_hsdiv_cb, ctx);
4004 static bool dsi_vm_calc(struct dsi_data *dsi,
4005 const struct omap_dss_dsi_config *cfg,
4006 struct dsi_clk_calc_ctx *ctx)
4008 const struct videomode *vm = cfg->vm;
4009 unsigned long clkin;
4010 unsigned long pll_min;
4011 unsigned long pll_max;
4012 int ndl = dsi->num_lanes_used - 1;
4013 int bitspp = mipi_dsi_pixel_format_to_bpp(cfg->pixel_format);
4014 unsigned long byteclk_min;
4016 clkin = clk_get_rate(dsi->pll.clkin);
4018 memset(ctx, 0, sizeof(*ctx));
4020 ctx->pll = &dsi->pll;
4023 /* these limits should come from the panel driver */
4024 ctx->req_pck_min = vm->pixelclock - 1000;
4025 ctx->req_pck_nom = vm->pixelclock;
4026 ctx->req_pck_max = vm->pixelclock + 1000;
4028 byteclk_min = div64_u64((u64)ctx->req_pck_min * bitspp, ndl * 8);
4029 pll_min = max(cfg->hs_clk_min * 4, byteclk_min * 4 * 4);
4031 if (cfg->trans_mode == OMAP_DSS_DSI_BURST_MODE) {
4032 pll_max = cfg->hs_clk_max * 4;
4034 unsigned long byteclk_max;
4035 byteclk_max = div64_u64((u64)ctx->req_pck_max * bitspp,
4038 pll_max = byteclk_max * 4 * 4;
4041 return dss_pll_calc_a(ctx->pll, clkin,
4043 dsi_vm_calc_pll_cb, ctx);
4046 static bool dsi_is_video_mode(struct omap_dss_device *dssdev)
4048 struct dsi_data *dsi = to_dsi_data(dssdev);
4050 return dsi->mode == OMAP_DSS_DSI_VIDEO_MODE;
4053 static int __dsi_calc_config(struct dsi_data *dsi,
4054 const struct drm_display_mode *mode,
4055 struct dsi_clk_calc_ctx *ctx)
4057 struct omap_dss_dsi_config cfg = dsi->config;
4058 struct videomode vm;
4062 drm_display_mode_to_videomode(mode, &vm);
4065 cfg.mode = dsi->mode;
4066 cfg.pixel_format = dsi->pix_fmt;
4068 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE)
4069 ok = dsi_vm_calc(dsi, &cfg, ctx);
4071 ok = dsi_cm_calc(dsi, &cfg, ctx);
4076 dsi_pll_calc_dsi_fck(dsi, &ctx->dsi_cinfo);
4078 r = dsi_lp_clock_calc(ctx->dsi_cinfo.clkout[HSDIV_DSI],
4079 cfg.lp_clk_min, cfg.lp_clk_max, &ctx->lp_cinfo);
4086 static int dsi_set_config(struct omap_dss_device *dssdev,
4087 const struct drm_display_mode *mode)
4089 struct dsi_data *dsi = to_dsi_data(dssdev);
4090 struct dsi_clk_calc_ctx ctx;
4093 mutex_lock(&dsi->lock);
4095 r = __dsi_calc_config(dsi, mode, &ctx);
4097 DSSERR("failed to find suitable DSI clock settings\n");
4101 dsi->user_lp_cinfo = ctx.lp_cinfo;
4102 dsi->user_dsi_cinfo = ctx.dsi_cinfo;
4103 dsi->user_dispc_cinfo = ctx.dispc_cinfo;
4108 * override interlace, logic level and edge related parameters in
4109 * videomode with default values
4111 dsi->vm.flags &= ~DISPLAY_FLAGS_INTERLACED;
4112 dsi->vm.flags &= ~DISPLAY_FLAGS_HSYNC_LOW;
4113 dsi->vm.flags |= DISPLAY_FLAGS_HSYNC_HIGH;
4114 dsi->vm.flags &= ~DISPLAY_FLAGS_VSYNC_LOW;
4115 dsi->vm.flags |= DISPLAY_FLAGS_VSYNC_HIGH;
4117 * HACK: These flags should be handled through the omap_dss_device bus
4118 * flags, but this will only be possible when the DSI encoder will be
4119 * converted to the omapdrm-managed encoder model.
4121 dsi->vm.flags &= ~DISPLAY_FLAGS_PIXDATA_NEGEDGE;
4122 dsi->vm.flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
4123 dsi->vm.flags &= ~DISPLAY_FLAGS_DE_LOW;
4124 dsi->vm.flags |= DISPLAY_FLAGS_DE_HIGH;
4125 dsi->vm.flags &= ~DISPLAY_FLAGS_SYNC_POSEDGE;
4126 dsi->vm.flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
4128 dss_mgr_set_timings(&dsi->output, &dsi->vm);
4130 dsi->vm_timings = ctx.dsi_vm;
4132 mutex_unlock(&dsi->lock);
4136 mutex_unlock(&dsi->lock);
4142 * Return a hardcoded dispc channel for the DSI output. This should work for
4143 * current use cases, but this can be later expanded to either resolve
4144 * the channel in some more dynamic manner, or get the channel as a user
4147 static enum omap_channel dsi_get_dispc_channel(struct dsi_data *dsi)
4149 switch (dsi->data->model) {
4150 case DSI_MODEL_OMAP3:
4151 return OMAP_DSS_CHANNEL_LCD;
4153 case DSI_MODEL_OMAP4:
4154 switch (dsi->module_id) {
4156 return OMAP_DSS_CHANNEL_LCD;
4158 return OMAP_DSS_CHANNEL_LCD2;
4160 DSSWARN("unsupported module id\n");
4161 return OMAP_DSS_CHANNEL_LCD;
4164 case DSI_MODEL_OMAP5:
4165 switch (dsi->module_id) {
4167 return OMAP_DSS_CHANNEL_LCD;
4169 return OMAP_DSS_CHANNEL_LCD3;
4171 DSSWARN("unsupported module id\n");
4172 return OMAP_DSS_CHANNEL_LCD;
4176 DSSWARN("unsupported DSS version\n");
4177 return OMAP_DSS_CHANNEL_LCD;
4181 static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi, int vc,
4182 const struct mipi_dsi_msg *msg)
4184 struct omap_dss_device *dssdev = &dsi->output;
4187 dsi_vc_enable_hs(dssdev, vc, !(msg->flags & MIPI_DSI_MSG_USE_LPM));
4189 switch (msg->type) {
4190 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
4191 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
4192 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
4193 case MIPI_DSI_GENERIC_LONG_WRITE:
4194 case MIPI_DSI_DCS_SHORT_WRITE:
4195 case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
4196 case MIPI_DSI_DCS_LONG_WRITE:
4197 case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
4198 case MIPI_DSI_NULL_PACKET:
4199 r = dsi_vc_write_common(dssdev, vc, msg);
4201 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
4202 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
4203 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
4204 r = dsi_vc_generic_read(dssdev, vc, msg);
4206 case MIPI_DSI_DCS_READ:
4207 r = dsi_vc_dcs_read(dssdev, vc, msg);
4217 if (msg->type == MIPI_DSI_DCS_SHORT_WRITE ||
4218 msg->type == MIPI_DSI_DCS_SHORT_WRITE_PARAM) {
4219 u8 cmd = ((u8 *)msg->tx_buf)[0];
4221 if (cmd == MIPI_DCS_SET_TEAR_OFF)
4222 dsi_enable_te(dsi, false);
4223 else if (cmd == MIPI_DCS_SET_TEAR_ON)
4224 dsi_enable_te(dsi, true);
4230 static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host,
4231 const struct mipi_dsi_msg *msg)
4233 struct dsi_data *dsi = host_to_omap(host);
4239 if (!dsi->iface_enabled) {
4241 schedule_delayed_work(&dsi->dsi_disable_work, msecs_to_jiffies(2000));
4244 r = _omap_dsi_host_transfer(dsi, vc, msg);
4246 dsi_bus_unlock(dsi);
4251 static int dsi_get_clocks(struct dsi_data *dsi)
4255 clk = devm_clk_get(dsi->dev, "fck");
4257 DSSERR("can't get fck\n");
4258 return PTR_ERR(clk);
4266 static const struct omapdss_dsi_ops dsi_ops = {
4267 .update = dsi_update_all,
4268 .is_video_mode = dsi_is_video_mode,
4271 static irqreturn_t omap_dsi_te_irq_handler(int irq, void *dev_id)
4273 struct dsi_data *dsi = (struct dsi_data *)dev_id;
4276 old = atomic_cmpxchg(&dsi->do_ext_te_update, 1, 0);
4278 cancel_delayed_work(&dsi->te_timeout_work);
4285 static void omap_dsi_te_timeout_work_callback(struct work_struct *work)
4287 struct dsi_data *dsi =
4288 container_of(work, struct dsi_data, te_timeout_work.work);
4291 old = atomic_cmpxchg(&dsi->do_ext_te_update, 1, 0);
4293 dev_err(dsi->dev, "TE not received for 250ms!\n");
4298 static int omap_dsi_register_te_irq(struct dsi_data *dsi,
4299 struct mipi_dsi_device *client)
4304 dsi->te_gpio = gpiod_get(&client->dev, "te-gpios", GPIOD_IN);
4305 if (IS_ERR(dsi->te_gpio)) {
4306 err = PTR_ERR(dsi->te_gpio);
4308 if (err == -ENOENT) {
4309 dsi->te_gpio = NULL;
4313 dev_err(dsi->dev, "Could not get TE gpio: %d\n", err);
4317 te_irq = gpiod_to_irq(dsi->te_gpio);
4319 gpiod_put(dsi->te_gpio);
4320 dsi->te_gpio = NULL;
4324 dsi->te_irq = te_irq;
4326 irq_set_status_flags(te_irq, IRQ_NOAUTOEN);
4328 err = request_threaded_irq(te_irq, NULL, omap_dsi_te_irq_handler,
4329 IRQF_TRIGGER_RISING, "TE", dsi);
4331 dev_err(dsi->dev, "request irq failed with %d\n", err);
4332 gpiod_put(dsi->te_gpio);
4333 dsi->te_gpio = NULL;
4337 INIT_DEFERRABLE_WORK(&dsi->te_timeout_work,
4338 omap_dsi_te_timeout_work_callback);
4340 dev_dbg(dsi->dev, "Using GPIO TE\n");
4345 static void omap_dsi_unregister_te_irq(struct dsi_data *dsi)
4348 free_irq(dsi->te_irq, dsi);
4349 cancel_delayed_work(&dsi->te_timeout_work);
4350 gpiod_put(dsi->te_gpio);
4351 dsi->te_gpio = NULL;
4355 static int omap_dsi_host_attach(struct mipi_dsi_host *host,
4356 struct mipi_dsi_device *client)
4358 struct dsi_data *dsi = host_to_omap(host);
4362 DSSERR("dsi client already attached\n");
4366 if (mipi_dsi_pixel_format_to_bpp(client->format) < 0) {
4367 DSSERR("invalid pixel format\n");
4371 atomic_set(&dsi->do_ext_te_update, 0);
4373 if (client->mode_flags & MIPI_DSI_MODE_VIDEO) {
4374 dsi->mode = OMAP_DSS_DSI_VIDEO_MODE;
4376 r = omap_dsi_register_te_irq(dsi, client);
4380 dsi->mode = OMAP_DSS_DSI_CMD_MODE;
4383 dsi->dsidev = client;
4384 dsi->pix_fmt = client->format;
4386 dsi->config.hs_clk_min = 150000000; // TODO: get from client?
4387 dsi->config.hs_clk_max = client->hs_rate;
4388 dsi->config.lp_clk_min = 7000000; // TODO: get from client?
4389 dsi->config.lp_clk_max = client->lp_rate;
4391 if (client->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
4392 dsi->config.trans_mode = OMAP_DSS_DSI_BURST_MODE;
4393 else if (client->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
4394 dsi->config.trans_mode = OMAP_DSS_DSI_PULSE_MODE;
4396 dsi->config.trans_mode = OMAP_DSS_DSI_EVENT_MODE;
4401 static int omap_dsi_host_detach(struct mipi_dsi_host *host,
4402 struct mipi_dsi_device *client)
4404 struct dsi_data *dsi = host_to_omap(host);
4406 if (WARN_ON(dsi->dsidev != client))
4409 cancel_delayed_work_sync(&dsi->dsi_disable_work);
4413 if (dsi->iface_enabled)
4416 dsi_bus_unlock(dsi);
4418 omap_dsi_unregister_te_irq(dsi);
4423 static const struct mipi_dsi_host_ops omap_dsi_host_ops = {
4424 .attach = omap_dsi_host_attach,
4425 .detach = omap_dsi_host_detach,
4426 .transfer = omap_dsi_host_transfer,
4429 /* -----------------------------------------------------------------------------
4433 static const struct dss_pll_ops dsi_pll_ops = {
4434 .enable = dsi_pll_enable,
4435 .disable = dsi_pll_disable,
4436 .set_config = dss_pll_write_config_type_a,
4439 static const struct dss_pll_hw dss_omap3_dsi_pll_hw = {
4440 .type = DSS_PLL_TYPE_A,
4442 .n_max = (1 << 7) - 1,
4443 .m_max = (1 << 11) - 1,
4444 .mX_max = (1 << 4) - 1,
4446 .fint_max = 2100000,
4447 .clkdco_low = 1000000000,
4448 .clkdco_max = 1800000000,
4460 .has_stopmode = true,
4461 .has_freqsel = true,
4462 .has_selfreqdco = false,
4463 .has_refsel = false,
4466 static const struct dss_pll_hw dss_omap4_dsi_pll_hw = {
4467 .type = DSS_PLL_TYPE_A,
4469 .n_max = (1 << 8) - 1,
4470 .m_max = (1 << 12) - 1,
4471 .mX_max = (1 << 5) - 1,
4473 .fint_max = 2500000,
4474 .clkdco_low = 1000000000,
4475 .clkdco_max = 1800000000,
4487 .has_stopmode = true,
4488 .has_freqsel = false,
4489 .has_selfreqdco = false,
4490 .has_refsel = false,
4493 static const struct dss_pll_hw dss_omap5_dsi_pll_hw = {
4494 .type = DSS_PLL_TYPE_A,
4496 .n_max = (1 << 8) - 1,
4497 .m_max = (1 << 12) - 1,
4498 .mX_max = (1 << 5) - 1,
4500 .fint_max = 52000000,
4501 .clkdco_low = 1000000000,
4502 .clkdco_max = 1800000000,
4514 .has_stopmode = true,
4515 .has_freqsel = false,
4516 .has_selfreqdco = true,
4520 static int dsi_init_pll_data(struct dss_device *dss, struct dsi_data *dsi)
4522 struct dss_pll *pll = &dsi->pll;
4526 clk = devm_clk_get(dsi->dev, "sys_clk");
4528 DSSERR("can't get sys_clk\n");
4529 return PTR_ERR(clk);
4532 pll->name = dsi->module_id == 0 ? "dsi0" : "dsi1";
4533 pll->id = dsi->module_id == 0 ? DSS_PLL_DSI1 : DSS_PLL_DSI2;
4535 pll->base = dsi->pll_base;
4536 pll->hw = dsi->data->pll_hw;
4537 pll->ops = &dsi_pll_ops;
4539 r = dss_pll_register(dss, pll);
4546 /* -----------------------------------------------------------------------------
4547 * Component Bind & Unbind
4550 static int dsi_bind(struct device *dev, struct device *master, void *data)
4552 struct dss_device *dss = dss_get_device(master);
4553 struct dsi_data *dsi = dev_get_drvdata(dev);
4560 dsi_init_pll_data(dss, dsi);
4562 r = dsi_runtime_get(dsi);
4566 rev = dsi_read_reg(dsi, DSI_REVISION);
4567 dev_dbg(dev, "OMAP DSI rev %d.%d\n",
4568 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
4570 dsi->line_buffer_size = dsi_get_line_buf_size(dsi);
4572 dsi_runtime_put(dsi);
4574 snprintf(name, sizeof(name), "dsi%u_regs", dsi->module_id + 1);
4575 dsi->debugfs.regs = dss_debugfs_create_file(dss, name,
4576 dsi_dump_dsi_regs, dsi);
4577 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
4578 snprintf(name, sizeof(name), "dsi%u_irqs", dsi->module_id + 1);
4579 dsi->debugfs.irqs = dss_debugfs_create_file(dss, name,
4580 dsi_dump_dsi_irqs, dsi);
4582 snprintf(name, sizeof(name), "dsi%u_clks", dsi->module_id + 1);
4583 dsi->debugfs.clks = dss_debugfs_create_file(dss, name,
4584 dsi_dump_dsi_clocks, dsi);
4589 static void dsi_unbind(struct device *dev, struct device *master, void *data)
4591 struct dsi_data *dsi = dev_get_drvdata(dev);
4593 dss_debugfs_remove_file(dsi->debugfs.clks);
4594 dss_debugfs_remove_file(dsi->debugfs.irqs);
4595 dss_debugfs_remove_file(dsi->debugfs.regs);
4597 WARN_ON(dsi->scp_clk_refcount > 0);
4599 dss_pll_unregister(&dsi->pll);
4602 static const struct component_ops dsi_component_ops = {
4604 .unbind = dsi_unbind,
4607 /* -----------------------------------------------------------------------------
4608 * DRM Bridge Operations
4611 static int dsi_bridge_attach(struct drm_bridge *bridge,
4612 enum drm_bridge_attach_flags flags)
4614 struct dsi_data *dsi = drm_bridge_to_dsi(bridge);
4616 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
4619 return drm_bridge_attach(bridge->encoder, dsi->output.next_bridge,
4623 static enum drm_mode_status
4624 dsi_bridge_mode_valid(struct drm_bridge *bridge,
4625 const struct drm_display_info *info,
4626 const struct drm_display_mode *mode)
4628 struct dsi_data *dsi = drm_bridge_to_dsi(bridge);
4629 struct dsi_clk_calc_ctx ctx;
4632 mutex_lock(&dsi->lock);
4633 r = __dsi_calc_config(dsi, mode, &ctx);
4634 mutex_unlock(&dsi->lock);
4636 return r ? MODE_CLOCK_RANGE : MODE_OK;
4639 static void dsi_bridge_mode_set(struct drm_bridge *bridge,
4640 const struct drm_display_mode *mode,
4641 const struct drm_display_mode *adjusted_mode)
4643 struct dsi_data *dsi = drm_bridge_to_dsi(bridge);
4645 dsi_set_config(&dsi->output, adjusted_mode);
4648 static void dsi_bridge_enable(struct drm_bridge *bridge)
4650 struct dsi_data *dsi = drm_bridge_to_dsi(bridge);
4651 struct omap_dss_device *dssdev = &dsi->output;
4653 cancel_delayed_work_sync(&dsi->dsi_disable_work);
4657 if (!dsi->iface_enabled)
4660 dsi_enable_video_output(dssdev, VC_VIDEO);
4662 dsi->video_enabled = true;
4664 dsi_bus_unlock(dsi);
4667 static void dsi_bridge_disable(struct drm_bridge *bridge)
4669 struct dsi_data *dsi = drm_bridge_to_dsi(bridge);
4670 struct omap_dss_device *dssdev = &dsi->output;
4672 cancel_delayed_work_sync(&dsi->dsi_disable_work);
4676 dsi->video_enabled = false;
4678 dsi_disable_video_output(dssdev, VC_VIDEO);
4682 dsi_bus_unlock(dsi);
4685 static const struct drm_bridge_funcs dsi_bridge_funcs = {
4686 .attach = dsi_bridge_attach,
4687 .mode_valid = dsi_bridge_mode_valid,
4688 .mode_set = dsi_bridge_mode_set,
4689 .enable = dsi_bridge_enable,
4690 .disable = dsi_bridge_disable,
4693 static void dsi_bridge_init(struct dsi_data *dsi)
4695 dsi->bridge.funcs = &dsi_bridge_funcs;
4696 dsi->bridge.of_node = dsi->host.dev->of_node;
4697 dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
4699 drm_bridge_add(&dsi->bridge);
4702 static void dsi_bridge_cleanup(struct dsi_data *dsi)
4704 drm_bridge_remove(&dsi->bridge);
4707 /* -----------------------------------------------------------------------------
4708 * Probe & Remove, Suspend & Resume
4711 static int dsi_init_output(struct dsi_data *dsi)
4713 struct omap_dss_device *out = &dsi->output;
4716 dsi_bridge_init(dsi);
4718 out->dev = dsi->dev;
4719 out->id = dsi->module_id == 0 ?
4720 OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
4722 out->type = OMAP_DISPLAY_TYPE_DSI;
4723 out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
4724 out->dispc_channel = dsi_get_dispc_channel(dsi);
4725 out->dsi_ops = &dsi_ops;
4727 out->bus_flags = DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE
4728 | DRM_BUS_FLAG_DE_HIGH
4729 | DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE;
4731 r = omapdss_device_init_output(out, &dsi->bridge);
4733 dsi_bridge_cleanup(dsi);
4737 omapdss_device_register(out);
4742 static void dsi_uninit_output(struct dsi_data *dsi)
4744 struct omap_dss_device *out = &dsi->output;
4746 omapdss_device_unregister(out);
4747 omapdss_device_cleanup_output(out);
4748 dsi_bridge_cleanup(dsi);
4751 static int dsi_probe_of(struct dsi_data *dsi)
4753 struct device_node *node = dsi->dev->of_node;
4754 struct property *prop;
4758 struct device_node *ep;
4760 ep = of_graph_get_endpoint_by_regs(node, 0, 0);
4764 prop = of_find_property(ep, "lanes", &len);
4766 dev_err(dsi->dev, "failed to find lane data\n");
4771 num_pins = len / sizeof(u32);
4773 if (num_pins < 4 || num_pins % 2 != 0 ||
4774 num_pins > dsi->num_lanes_supported * 2) {
4775 dev_err(dsi->dev, "bad number of lanes\n");
4780 r = of_property_read_u32_array(ep, "lanes", lane_arr, num_pins);
4782 dev_err(dsi->dev, "failed to read lane data\n");
4786 r = dsi_configure_pins(dsi, num_pins, lane_arr);
4788 dev_err(dsi->dev, "failed to configure pins");
4801 static const struct dsi_of_data dsi_of_data_omap34xx = {
4802 .model = DSI_MODEL_OMAP3,
4803 .pll_hw = &dss_omap3_dsi_pll_hw,
4804 .modules = (const struct dsi_module_id_data[]) {
4805 { .address = 0x4804fc00, .id = 0, },
4808 .max_fck_freq = 173000000,
4809 .max_pll_lpdiv = (1 << 13) - 1,
4810 .quirks = DSI_QUIRK_REVERSE_TXCLKESC,
4813 static const struct dsi_of_data dsi_of_data_omap36xx = {
4814 .model = DSI_MODEL_OMAP3,
4815 .pll_hw = &dss_omap3_dsi_pll_hw,
4816 .modules = (const struct dsi_module_id_data[]) {
4817 { .address = 0x4804fc00, .id = 0, },
4820 .max_fck_freq = 173000000,
4821 .max_pll_lpdiv = (1 << 13) - 1,
4822 .quirks = DSI_QUIRK_PLL_PWR_BUG,
4825 static const struct dsi_of_data dsi_of_data_omap4 = {
4826 .model = DSI_MODEL_OMAP4,
4827 .pll_hw = &dss_omap4_dsi_pll_hw,
4828 .modules = (const struct dsi_module_id_data[]) {
4829 { .address = 0x58004000, .id = 0, },
4830 { .address = 0x58005000, .id = 1, },
4833 .max_fck_freq = 170000000,
4834 .max_pll_lpdiv = (1 << 13) - 1,
4835 .quirks = DSI_QUIRK_DCS_CMD_CONFIG_VC | DSI_QUIRK_VC_OCP_WIDTH
4839 static const struct dsi_of_data dsi_of_data_omap5 = {
4840 .model = DSI_MODEL_OMAP5,
4841 .pll_hw = &dss_omap5_dsi_pll_hw,
4842 .modules = (const struct dsi_module_id_data[]) {
4843 { .address = 0x58004000, .id = 0, },
4844 { .address = 0x58009000, .id = 1, },
4847 .max_fck_freq = 209250000,
4848 .max_pll_lpdiv = (1 << 13) - 1,
4849 .quirks = DSI_QUIRK_DCS_CMD_CONFIG_VC | DSI_QUIRK_VC_OCP_WIDTH
4850 | DSI_QUIRK_GNQ | DSI_QUIRK_PHY_DCC,
4853 static const struct of_device_id dsi_of_match[] = {
4854 { .compatible = "ti,omap3-dsi", .data = &dsi_of_data_omap36xx, },
4855 { .compatible = "ti,omap4-dsi", .data = &dsi_of_data_omap4, },
4856 { .compatible = "ti,omap5-dsi", .data = &dsi_of_data_omap5, },
4860 static const struct soc_device_attribute dsi_soc_devices[] = {
4861 { .machine = "OMAP3[45]*", .data = &dsi_of_data_omap34xx },
4862 { .machine = "AM35*", .data = &dsi_of_data_omap34xx },
4866 static void omap_dsi_disable_work_callback(struct work_struct *work)
4868 struct dsi_data *dsi = container_of(work, struct dsi_data, dsi_disable_work.work);
4872 if (dsi->iface_enabled && !dsi->video_enabled)
4875 dsi_bus_unlock(dsi);
4878 static int dsi_probe(struct platform_device *pdev)
4880 const struct soc_device_attribute *soc;
4881 const struct dsi_module_id_data *d;
4882 struct device *dev = &pdev->dev;
4883 struct dsi_data *dsi;
4884 struct resource *dsi_mem;
4885 struct resource *res;
4889 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
4894 dev_set_drvdata(dev, dsi);
4896 spin_lock_init(&dsi->irq_lock);
4897 spin_lock_init(&dsi->errors_lock);
4900 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
4901 spin_lock_init(&dsi->irq_stats_lock);
4902 dsi->irq_stats.last_reset = jiffies;
4905 mutex_init(&dsi->lock);
4906 sema_init(&dsi->bus_lock, 1);
4908 INIT_DEFERRABLE_WORK(&dsi->framedone_timeout_work,
4909 dsi_framedone_timeout_work_callback);
4911 INIT_DEFERRABLE_WORK(&dsi->dsi_disable_work, omap_dsi_disable_work_callback);
4913 #ifdef DSI_CATCH_MISSING_TE
4914 timer_setup(&dsi->te_timer, dsi_te_timeout, 0);
4917 dsi_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "proto");
4918 dsi->proto_base = devm_ioremap_resource(dev, dsi_mem);
4919 if (IS_ERR(dsi->proto_base))
4920 return PTR_ERR(dsi->proto_base);
4922 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
4923 dsi->phy_base = devm_ioremap_resource(dev, res);
4924 if (IS_ERR(dsi->phy_base))
4925 return PTR_ERR(dsi->phy_base);
4927 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll");
4928 dsi->pll_base = devm_ioremap_resource(dev, res);
4929 if (IS_ERR(dsi->pll_base))
4930 return PTR_ERR(dsi->pll_base);
4932 dsi->irq = platform_get_irq(pdev, 0);
4934 DSSERR("platform_get_irq failed\n");
4938 r = devm_request_irq(dev, dsi->irq, omap_dsi_irq_handler,
4939 IRQF_SHARED, dev_name(dev), dsi);
4941 DSSERR("request_irq failed\n");
4945 dsi->vdds_dsi_reg = devm_regulator_get(dev, "vdd");
4946 if (IS_ERR(dsi->vdds_dsi_reg)) {
4947 if (PTR_ERR(dsi->vdds_dsi_reg) != -EPROBE_DEFER)
4948 DSSERR("can't get DSI VDD regulator\n");
4949 return PTR_ERR(dsi->vdds_dsi_reg);
4952 soc = soc_device_match(dsi_soc_devices);
4954 dsi->data = soc->data;
4956 dsi->data = of_match_node(dsi_of_match, dev->of_node)->data;
4958 d = dsi->data->modules;
4959 while (d->address != 0 && d->address != dsi_mem->start)
4962 if (d->address == 0) {
4963 DSSERR("unsupported DSI module\n");
4967 dsi->module_id = d->id;
4969 if (dsi->data->model == DSI_MODEL_OMAP4 ||
4970 dsi->data->model == DSI_MODEL_OMAP5) {
4971 struct device_node *np;
4974 * The OMAP4/5 display DT bindings don't reference the padconf
4975 * syscon. Our only option to retrieve it is to find it by name.
4977 np = of_find_node_by_name(NULL,
4978 dsi->data->model == DSI_MODEL_OMAP4 ?
4979 "omap4_padconf_global" : "omap5_padconf_global");
4983 dsi->syscon = syscon_node_to_regmap(np);
4987 /* DSI VCs initialization */
4988 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++)
4989 dsi->vc[i].source = DSI_VC_SOURCE_L4;
4991 r = dsi_get_clocks(dsi);
4995 pm_runtime_enable(dev);
4997 /* DSI on OMAP3 doesn't have register DSI_GNQ, set number
4998 * of data to 3 by default */
4999 if (dsi->data->quirks & DSI_QUIRK_GNQ) {
5000 dsi_runtime_get(dsi);
5002 dsi->num_lanes_supported = 1 + REG_GET(dsi, DSI_GNQ, 11, 9);
5003 dsi_runtime_put(dsi);
5005 dsi->num_lanes_supported = 3;
5008 dsi->host.ops = &omap_dsi_host_ops;
5009 dsi->host.dev = &pdev->dev;
5011 r = dsi_probe_of(dsi);
5013 DSSERR("Invalid DSI DT data\n");
5014 goto err_pm_disable;
5017 r = mipi_dsi_host_register(&dsi->host);
5019 dev_err(&pdev->dev, "failed to register DSI host: %d\n", r);
5020 goto err_pm_disable;
5023 r = dsi_init_output(dsi);
5025 goto err_dsi_host_unregister;
5027 r = component_add(&pdev->dev, &dsi_component_ops);
5029 goto err_uninit_output;
5034 dsi_uninit_output(dsi);
5035 err_dsi_host_unregister:
5036 mipi_dsi_host_unregister(&dsi->host);
5038 pm_runtime_disable(dev);
5042 static int dsi_remove(struct platform_device *pdev)
5044 struct dsi_data *dsi = platform_get_drvdata(pdev);
5046 component_del(&pdev->dev, &dsi_component_ops);
5048 dsi_uninit_output(dsi);
5050 mipi_dsi_host_unregister(&dsi->host);
5052 pm_runtime_disable(&pdev->dev);
5054 if (dsi->vdds_dsi_reg != NULL && dsi->vdds_dsi_enabled) {
5055 regulator_disable(dsi->vdds_dsi_reg);
5056 dsi->vdds_dsi_enabled = false;
5062 static int dsi_runtime_suspend(struct device *dev)
5064 struct dsi_data *dsi = dev_get_drvdata(dev);
5066 dsi->is_enabled = false;
5067 /* ensure the irq handler sees the is_enabled value */
5069 /* wait for current handler to finish before turning the DSI off */
5070 synchronize_irq(dsi->irq);
5075 static int dsi_runtime_resume(struct device *dev)
5077 struct dsi_data *dsi = dev_get_drvdata(dev);
5079 dsi->is_enabled = true;
5080 /* ensure the irq handler sees the is_enabled value */
5086 static const struct dev_pm_ops dsi_pm_ops = {
5087 .runtime_suspend = dsi_runtime_suspend,
5088 .runtime_resume = dsi_runtime_resume,
5089 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
5092 struct platform_driver omap_dsihw_driver = {
5094 .remove = dsi_remove,
5096 .name = "omapdss_dsi",
5098 .of_match_table = dsi_of_match,
5099 .suppress_bind_attrs = true,