1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
7 #include <linux/delay.h>
8 #include <linux/dma-mapping.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/interrupt.h>
12 #include <linux/mfd/syscon.h>
14 #include <linux/of_graph.h>
15 #include <linux/of_irq.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_opp.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/consumer.h>
20 #include <linux/spinlock.h>
22 #include <video/mipi_display.h>
24 #include <drm/display/drm_dsc_helper.h>
25 #include <drm/drm_of.h>
31 #include "msm_dsc_helper.h"
34 #include "phy/dsi_phy.h"
36 #define DSI_RESET_TOGGLE_DELAY_MS 20
38 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc);
40 static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
48 * From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
49 * makes all other registers 4-byte shifted down.
51 * In order to identify between DSI6G(v3) and beyond, and DSIv2 and
52 * older, we read the DSI_VERSION register without any shift(offset
53 * 0x1f0). In the case of DSIv2, this hast to be a non-zero value. In
54 * the case of DSI6G, this has to be zero (the offset points to a
55 * scratch register which we never touch)
58 ver = msm_readl(base + REG_DSI_VERSION);
60 /* older dsi host, there is no register shift */
61 ver = FIELD(ver, DSI_VERSION_MAJOR);
62 if (ver <= MSM_DSI_VER_MAJOR_V2) {
72 * newer host, offset 0 has 6G_HW_VERSION, the rest of the
73 * registers are shifted down, read DSI_VERSION again with
76 ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
77 ver = FIELD(ver, DSI_VERSION_MAJOR);
78 if (ver == MSM_DSI_VER_MAJOR_6G) {
81 *minor = msm_readl(base + REG_DSI_6G_HW_VERSION);
89 #define DSI_ERR_STATE_ACK 0x0000
90 #define DSI_ERR_STATE_TIMEOUT 0x0001
91 #define DSI_ERR_STATE_DLN0_PHY 0x0002
92 #define DSI_ERR_STATE_FIFO 0x0004
93 #define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
94 #define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
95 #define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
97 #define DSI_CLK_CTRL_ENABLE_CLKS \
98 (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
99 DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
100 DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
101 DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
103 struct msm_dsi_host {
104 struct mipi_dsi_host base;
106 struct platform_device *pdev;
107 struct drm_device *dev;
111 void __iomem *ctrl_base;
112 phys_addr_t ctrl_size;
113 struct regulator_bulk_data *supplies;
116 struct clk_bulk_data bus_clks[DSI_BUS_CLK_MAX];
118 struct clk *byte_clk;
120 struct clk *pixel_clk;
121 struct clk *byte_intf_clk;
123 unsigned long byte_clk_rate;
124 unsigned long byte_intf_clk_rate;
125 unsigned long pixel_clk_rate;
126 unsigned long esc_clk_rate;
128 /* DSI v2 specific clocks */
131 unsigned long src_clk_rate;
133 struct gpio_desc *disp_en_gpio;
134 struct gpio_desc *te_gpio;
136 const struct msm_dsi_cfg_handler *cfg_hnd;
138 struct completion dma_comp;
139 struct completion video_comp;
140 struct mutex dev_mutex;
141 struct mutex cmd_mutex;
142 spinlock_t intr_lock; /* Protect interrupt ctrl register */
145 struct work_struct err_work;
146 struct workqueue_struct *workqueue;
148 /* DSI 6G TX buffer*/
149 struct drm_gem_object *tx_gem_obj;
150 struct msm_gem_address_space *aspace;
152 /* DSI v2 TX buffer */
154 dma_addr_t tx_buf_paddr;
162 struct drm_display_mode *mode;
163 struct drm_dsc_config *dsc;
165 /* connected device info */
166 unsigned int channel;
168 enum mipi_dsi_pixel_format format;
169 unsigned long mode_flags;
171 /* lane data parsed via DT */
178 u32 dma_cmd_ctrl_restore;
186 static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
189 case MIPI_DSI_FMT_RGB565: return 16;
190 case MIPI_DSI_FMT_RGB666_PACKED: return 18;
191 case MIPI_DSI_FMT_RGB666:
192 case MIPI_DSI_FMT_RGB888:
197 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
199 return msm_readl(msm_host->ctrl_base + reg);
201 static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
203 msm_writel(data, msm_host->ctrl_base + reg);
206 static const struct msm_dsi_cfg_handler *dsi_get_config(
207 struct msm_dsi_host *msm_host)
209 const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
210 struct device *dev = &msm_host->pdev->dev;
213 u32 major = 0, minor = 0;
215 ahb_clk = msm_clk_get(msm_host->pdev, "iface");
216 if (IS_ERR(ahb_clk)) {
217 pr_err("%s: cannot get interface clock\n", __func__);
221 pm_runtime_get_sync(dev);
223 ret = clk_prepare_enable(ahb_clk);
225 pr_err("%s: unable to enable ahb_clk\n", __func__);
229 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
231 pr_err("%s: Invalid version\n", __func__);
235 cfg_hnd = msm_dsi_cfg_get(major, minor);
237 DBG("%s: Version %x:%x\n", __func__, major, minor);
240 clk_disable_unprepare(ahb_clk);
242 pm_runtime_put_sync(dev);
247 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
249 return container_of(host, struct msm_dsi_host, base);
252 int dsi_clk_init_v2(struct msm_dsi_host *msm_host)
254 struct platform_device *pdev = msm_host->pdev;
257 msm_host->src_clk = msm_clk_get(pdev, "src");
259 if (IS_ERR(msm_host->src_clk)) {
260 ret = PTR_ERR(msm_host->src_clk);
261 pr_err("%s: can't find src clock. ret=%d\n",
263 msm_host->src_clk = NULL;
270 int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host)
272 struct platform_device *pdev = msm_host->pdev;
275 msm_host->byte_intf_clk = msm_clk_get(pdev, "byte_intf");
276 if (IS_ERR(msm_host->byte_intf_clk)) {
277 ret = PTR_ERR(msm_host->byte_intf_clk);
278 pr_err("%s: can't find byte_intf clock. ret=%d\n",
285 static int dsi_clk_init(struct msm_dsi_host *msm_host)
287 struct platform_device *pdev = msm_host->pdev;
288 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
289 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
293 for (i = 0; i < cfg->num_bus_clks; i++)
294 msm_host->bus_clks[i].id = cfg->bus_clk_names[i];
295 msm_host->num_bus_clks = cfg->num_bus_clks;
297 ret = devm_clk_bulk_get(&pdev->dev, msm_host->num_bus_clks, msm_host->bus_clks);
299 dev_err(&pdev->dev, "Unable to get clocks, ret = %d\n", ret);
303 /* get link and source clocks */
304 msm_host->byte_clk = msm_clk_get(pdev, "byte");
305 if (IS_ERR(msm_host->byte_clk)) {
306 ret = PTR_ERR(msm_host->byte_clk);
307 pr_err("%s: can't find dsi_byte clock. ret=%d\n",
309 msm_host->byte_clk = NULL;
313 msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
314 if (IS_ERR(msm_host->pixel_clk)) {
315 ret = PTR_ERR(msm_host->pixel_clk);
316 pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
318 msm_host->pixel_clk = NULL;
322 msm_host->esc_clk = msm_clk_get(pdev, "core");
323 if (IS_ERR(msm_host->esc_clk)) {
324 ret = PTR_ERR(msm_host->esc_clk);
325 pr_err("%s: can't find dsi_esc clock. ret=%d\n",
327 msm_host->esc_clk = NULL;
331 if (cfg_hnd->ops->clk_init_ver)
332 ret = cfg_hnd->ops->clk_init_ver(msm_host);
337 int msm_dsi_runtime_suspend(struct device *dev)
339 struct platform_device *pdev = to_platform_device(dev);
340 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
341 struct mipi_dsi_host *host = msm_dsi->host;
342 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
344 if (!msm_host->cfg_hnd)
347 clk_bulk_disable_unprepare(msm_host->num_bus_clks, msm_host->bus_clks);
352 int msm_dsi_runtime_resume(struct device *dev)
354 struct platform_device *pdev = to_platform_device(dev);
355 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
356 struct mipi_dsi_host *host = msm_dsi->host;
357 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
359 if (!msm_host->cfg_hnd)
362 return clk_bulk_prepare_enable(msm_host->num_bus_clks, msm_host->bus_clks);
365 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
369 DBG("Set clk rates: pclk=%d, byteclk=%lu",
370 msm_host->mode->clock, msm_host->byte_clk_rate);
372 ret = dev_pm_opp_set_rate(&msm_host->pdev->dev,
373 msm_host->byte_clk_rate);
375 pr_err("%s: dev_pm_opp_set_rate failed %d\n", __func__, ret);
379 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
381 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
385 if (msm_host->byte_intf_clk) {
386 ret = clk_set_rate(msm_host->byte_intf_clk, msm_host->byte_intf_clk_rate);
388 pr_err("%s: Failed to set rate byte intf clk, %d\n",
398 int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
402 ret = clk_prepare_enable(msm_host->esc_clk);
404 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
408 ret = clk_prepare_enable(msm_host->byte_clk);
410 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
414 ret = clk_prepare_enable(msm_host->pixel_clk);
416 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
420 ret = clk_prepare_enable(msm_host->byte_intf_clk);
422 pr_err("%s: Failed to enable byte intf clk\n",
424 goto byte_intf_clk_err;
430 clk_disable_unprepare(msm_host->pixel_clk);
432 clk_disable_unprepare(msm_host->byte_clk);
434 clk_disable_unprepare(msm_host->esc_clk);
439 int dsi_link_clk_set_rate_v2(struct msm_dsi_host *msm_host)
443 DBG("Set clk rates: pclk=%d, byteclk=%lu, esc_clk=%lu, dsi_src_clk=%lu",
444 msm_host->mode->clock, msm_host->byte_clk_rate,
445 msm_host->esc_clk_rate, msm_host->src_clk_rate);
447 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
449 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
453 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
455 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
459 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
461 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
465 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
467 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
474 int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
478 ret = clk_prepare_enable(msm_host->byte_clk);
480 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
484 ret = clk_prepare_enable(msm_host->esc_clk);
486 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
490 ret = clk_prepare_enable(msm_host->src_clk);
492 pr_err("%s: Failed to enable dsi src clk\n", __func__);
496 ret = clk_prepare_enable(msm_host->pixel_clk);
498 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
505 clk_disable_unprepare(msm_host->src_clk);
507 clk_disable_unprepare(msm_host->esc_clk);
509 clk_disable_unprepare(msm_host->byte_clk);
514 void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host)
516 /* Drop the performance state vote */
517 dev_pm_opp_set_rate(&msm_host->pdev->dev, 0);
518 clk_disable_unprepare(msm_host->esc_clk);
519 clk_disable_unprepare(msm_host->pixel_clk);
520 clk_disable_unprepare(msm_host->byte_intf_clk);
521 clk_disable_unprepare(msm_host->byte_clk);
524 void dsi_link_clk_disable_v2(struct msm_dsi_host *msm_host)
526 clk_disable_unprepare(msm_host->pixel_clk);
527 clk_disable_unprepare(msm_host->src_clk);
528 clk_disable_unprepare(msm_host->esc_clk);
529 clk_disable_unprepare(msm_host->byte_clk);
532 static unsigned long dsi_adjust_pclk_for_compression(const struct drm_display_mode *mode,
533 const struct drm_dsc_config *dsc)
535 int new_hdisplay = DIV_ROUND_UP(mode->hdisplay * drm_dsc_get_bpp_int(dsc),
536 dsc->bits_per_component * 3);
538 int new_htotal = mode->htotal - mode->hdisplay + new_hdisplay;
540 return new_htotal * mode->vtotal * drm_mode_vrefresh(mode);
543 static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode,
544 const struct drm_dsc_config *dsc, bool is_bonded_dsi)
546 unsigned long pclk_rate;
548 pclk_rate = mode->clock * 1000;
551 pclk_rate = dsi_adjust_pclk_for_compression(mode, dsc);
554 * For bonded DSI mode, the current DRM mode has the complete width of the
555 * panel. Since, the complete panel is driven by two DSI controllers,
556 * the clock rates have to be split between the two dsi controllers.
557 * Adjust the byte and pixel clock rates for each dsi host accordingly.
565 unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_dsi,
566 const struct drm_display_mode *mode)
568 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
569 u8 lanes = msm_host->lanes;
570 u32 bpp = dsi_get_bpp(msm_host->format);
571 unsigned long pclk_rate = dsi_get_pclk_rate(mode, msm_host->dsc, is_bonded_dsi);
572 unsigned long pclk_bpp;
575 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
579 /* CPHY "byte_clk" is in units of 16 bits */
580 if (msm_host->cphy_mode)
581 pclk_bpp = mult_frac(pclk_rate, bpp, 16 * lanes);
583 pclk_bpp = mult_frac(pclk_rate, bpp, 8 * lanes);
588 static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
590 msm_host->pixel_clk_rate = dsi_get_pclk_rate(msm_host->mode, msm_host->dsc, is_bonded_dsi);
591 msm_host->byte_clk_rate = dsi_byte_clk_get_rate(&msm_host->base, is_bonded_dsi,
594 DBG("pclk=%lu, bclk=%lu", msm_host->pixel_clk_rate,
595 msm_host->byte_clk_rate);
599 int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
601 if (!msm_host->mode) {
602 pr_err("%s: mode not set\n", __func__);
606 dsi_calc_pclk(msm_host, is_bonded_dsi);
607 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
611 int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
613 u32 bpp = dsi_get_bpp(msm_host->format);
614 unsigned int esc_mhz, esc_div;
615 unsigned long byte_mhz;
617 dsi_calc_pclk(msm_host, is_bonded_dsi);
619 msm_host->src_clk_rate = mult_frac(msm_host->pixel_clk_rate, bpp, 8);
622 * esc clock is byte clock followed by a 4 bit divider,
623 * we need to find an escape clock frequency within the
624 * mipi DSI spec range within the maximum divider limit
625 * We iterate here between an escape clock frequencey
626 * between 20 Mhz to 5 Mhz and pick up the first one
627 * that can be supported by our divider
630 byte_mhz = msm_host->byte_clk_rate / 1000000;
632 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
633 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
636 * TODO: Ideally, we shouldn't know what sort of divider
637 * is available in mmss_cc, we're just assuming that
638 * it'll always be a 4 bit divider. Need to come up with
641 if (esc_div >= 1 && esc_div <= 16)
648 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
650 DBG("esc=%lu, src=%lu", msm_host->esc_clk_rate,
651 msm_host->src_clk_rate);
656 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
661 spin_lock_irqsave(&msm_host->intr_lock, flags);
662 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
669 DBG("intr=%x enable=%d", intr, enable);
671 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
672 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
675 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
677 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
679 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
680 return NON_BURST_SYNCH_PULSE;
682 return NON_BURST_SYNCH_EVENT;
685 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
686 const enum mipi_dsi_pixel_format mipi_fmt)
689 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
690 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
691 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
692 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
693 default: return VID_DST_FORMAT_RGB888;
697 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
698 const enum mipi_dsi_pixel_format mipi_fmt)
701 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
702 case MIPI_DSI_FMT_RGB666_PACKED:
703 case MIPI_DSI_FMT_RGB666: return CMD_DST_FORMAT_RGB666;
704 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
705 default: return CMD_DST_FORMAT_RGB888;
709 static void dsi_ctrl_disable(struct msm_dsi_host *msm_host)
711 dsi_write(msm_host, REG_DSI_CTRL, 0);
714 static void dsi_ctrl_enable(struct msm_dsi_host *msm_host,
715 struct msm_dsi_phy_shared_timings *phy_shared_timings, struct msm_dsi_phy *phy)
717 u32 flags = msm_host->mode_flags;
718 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
719 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
720 u32 data = 0, lane_ctrl = 0;
722 if (flags & MIPI_DSI_MODE_VIDEO) {
723 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
724 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
725 if (flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
726 data |= DSI_VID_CFG0_HFP_POWER_STOP;
727 if (flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
728 data |= DSI_VID_CFG0_HBP_POWER_STOP;
729 if (flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
730 data |= DSI_VID_CFG0_HSA_POWER_STOP;
731 /* Always set low power stop mode for BLLP
732 * to let command engine send packets
734 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
735 DSI_VID_CFG0_BLLP_POWER_STOP;
736 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
737 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
738 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
739 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
741 /* Do not swap RGB colors */
742 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
743 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
745 /* Do not swap RGB colors */
746 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
747 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
748 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
750 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
751 DSI_CMD_CFG1_WR_MEM_CONTINUE(
752 MIPI_DCS_WRITE_MEMORY_CONTINUE);
753 /* Always insert DCS command */
754 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
755 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
757 if (msm_host->cfg_hnd->major == MSM_DSI_VER_MAJOR_6G &&
758 msm_host->cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_3) {
759 data = dsi_read(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2);
760 data |= DSI_CMD_MODE_MDP_CTRL2_BURST_MODE;
761 dsi_write(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2, data);
765 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
766 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
767 DSI_CMD_DMA_CTRL_LOW_POWER);
770 /* Always assume dedicated TE pin */
771 data |= DSI_TRIG_CTRL_TE;
772 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
773 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
774 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
775 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
776 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
777 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
778 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
780 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(phy_shared_timings->clk_post) |
781 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(phy_shared_timings->clk_pre);
782 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
784 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
785 (cfg_hnd->minor > MSM_DSI_6G_VER_MINOR_V1_0) &&
786 phy_shared_timings->clk_pre_inc_by_2)
787 dsi_write(msm_host, REG_DSI_T_CLK_PRE_EXTEND,
788 DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK);
791 if (!(flags & MIPI_DSI_MODE_NO_EOT_PACKET))
792 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
793 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
795 /* allow only ack-err-status to generate interrupt */
796 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
798 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
800 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
802 data = DSI_CTRL_CLK_EN;
804 DBG("lane number=%d", msm_host->lanes);
805 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
807 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
808 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
810 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) {
811 lane_ctrl = dsi_read(msm_host, REG_DSI_LANE_CTRL);
813 if (msm_dsi_phy_set_continuous_clock(phy, true))
814 lane_ctrl &= ~DSI_LANE_CTRL_HS_REQ_SEL_PHY;
816 dsi_write(msm_host, REG_DSI_LANE_CTRL,
817 lane_ctrl | DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
820 data |= DSI_CTRL_ENABLE;
822 dsi_write(msm_host, REG_DSI_CTRL, data);
824 if (msm_host->cphy_mode)
825 dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
828 static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mode, u32 hdisplay)
830 struct drm_dsc_config *dsc = msm_host->dsc;
831 u32 reg, reg_ctrl, reg_ctrl2;
832 u32 slice_per_intf, total_bytes_per_intf;
836 /* first calculate dsc parameters and then program
837 * compress mode registers
839 slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
841 total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
843 eol_byte_num = total_bytes_per_intf % 3;
846 * Typically, pkt_per_line = slice_per_intf * slice_per_pkt.
848 * Since the current driver only supports slice_per_pkt = 1,
849 * pkt_per_line will be equal to slice per intf for now.
851 pkt_per_line = slice_per_intf;
853 if (is_cmd_mode) /* packet data type */
854 reg = DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_LONG_WRITE);
856 reg = DSI_VIDEO_COMPRESSION_MODE_CTRL_DATATYPE(MIPI_DSI_COMPRESSED_PIXEL_STREAM);
858 /* DSI_VIDEO_COMPRESSION_MODE & DSI_COMMAND_COMPRESSION_MODE
859 * registers have similar offsets, so for below common code use
860 * DSI_VIDEO_COMPRESSION_MODE_XXXX for setting bits
862 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_PKT_PER_LINE(pkt_per_line >> 1);
863 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EOL_BYTE_NUM(eol_byte_num);
864 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EN;
867 reg_ctrl = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL);
868 reg_ctrl2 = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2);
873 reg_ctrl2 &= ~DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH__MASK;
874 reg_ctrl2 |= DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH(dsc->slice_chunk_size);
876 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
877 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
879 dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
883 static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
885 struct drm_display_mode *mode = msm_host->mode;
886 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
887 u32 h_total = mode->htotal;
888 u32 v_total = mode->vtotal;
889 u32 hs_end = mode->hsync_end - mode->hsync_start;
890 u32 vs_end = mode->vsync_end - mode->vsync_start;
891 u32 ha_start = h_total - mode->hsync_start;
892 u32 ha_end = ha_start + mode->hdisplay;
893 u32 va_start = v_total - mode->vsync_start;
894 u32 va_end = va_start + mode->vdisplay;
895 u32 hdisplay = mode->hdisplay;
902 * For bonded DSI mode, the current DRM mode has
903 * the complete width of the panel. Since, the complete
904 * panel is driven by two DSI controllers, the horizontal
905 * timings have to be split between the two dsi controllers.
906 * Adjust the DSI host timing values accordingly.
917 struct drm_dsc_config *dsc = msm_host->dsc;
919 /* update dsc params with timing params */
920 if (!dsc || !mode->hdisplay || !mode->vdisplay) {
921 pr_err("DSI: invalid input: pic_width: %d pic_height: %d\n",
922 mode->hdisplay, mode->vdisplay);
926 dsc->pic_width = mode->hdisplay;
927 dsc->pic_height = mode->vdisplay;
928 DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);
930 /* we do the calculations for dsc parameters here so that
931 * panel can use these parameters
933 ret = dsi_populate_dsc_params(msm_host, dsc);
937 /* Divide the display by 3 but keep back/font porch and
941 hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3);
943 ha_end = ha_start + hdisplay;
946 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
948 dsi_update_dsc_timing(msm_host, false, mode->hdisplay);
950 dsi_write(msm_host, REG_DSI_ACTIVE_H,
951 DSI_ACTIVE_H_START(ha_start) |
952 DSI_ACTIVE_H_END(ha_end));
953 dsi_write(msm_host, REG_DSI_ACTIVE_V,
954 DSI_ACTIVE_V_START(va_start) |
955 DSI_ACTIVE_V_END(va_end));
956 dsi_write(msm_host, REG_DSI_TOTAL,
957 DSI_TOTAL_H_TOTAL(h_total - 1) |
958 DSI_TOTAL_V_TOTAL(v_total - 1));
960 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
961 DSI_ACTIVE_HSYNC_START(hs_start) |
962 DSI_ACTIVE_HSYNC_END(hs_end));
963 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
964 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
965 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
966 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
967 } else { /* command mode */
969 dsi_update_dsc_timing(msm_host, true, mode->hdisplay);
971 /* image data and 1 byte write_memory_start cmd */
973 wc = hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
976 * When DSC is enabled, WC = slice_chunk_size * slice_per_pkt + 1.
977 * Currently, the driver only supports default value of slice_per_pkt = 1
979 * TODO: Expand mipi_dsi_device struct to hold slice_per_pkt info
980 * and adjust DSC math to account for slice_per_pkt.
982 wc = msm_host->dsc->slice_chunk_size + 1;
984 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_CTRL,
985 DSI_CMD_MDP_STREAM0_CTRL_WORD_COUNT(wc) |
986 DSI_CMD_MDP_STREAM0_CTRL_VIRTUAL_CHANNEL(
988 DSI_CMD_MDP_STREAM0_CTRL_DATA_TYPE(
989 MIPI_DSI_DCS_LONG_WRITE));
991 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL,
992 DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) |
993 DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay));
997 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
1001 ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1003 if (ctrl & DSI_CTRL_ENABLE) {
1004 dsi_write(msm_host, REG_DSI_CTRL, ctrl & ~DSI_CTRL_ENABLE);
1006 * dsi controller need to be disabled before
1012 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1013 wmb(); /* clocks need to be enabled before reset */
1015 /* dsi controller can only be reset while clocks are running */
1016 dsi_write(msm_host, REG_DSI_RESET, 1);
1017 msleep(DSI_RESET_TOGGLE_DELAY_MS); /* make sure reset happen */
1018 dsi_write(msm_host, REG_DSI_RESET, 0);
1019 wmb(); /* controller out of reset */
1021 if (ctrl & DSI_CTRL_ENABLE) {
1022 dsi_write(msm_host, REG_DSI_CTRL, ctrl);
1023 wmb(); /* make sure dsi controller enabled again */
1027 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
1028 bool video_mode, bool enable)
1032 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1035 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
1036 DSI_CTRL_CMD_MODE_EN);
1037 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
1038 DSI_IRQ_MASK_VIDEO_DONE, 0);
1041 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
1042 } else { /* command mode */
1043 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
1044 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
1046 dsi_ctrl |= DSI_CTRL_ENABLE;
1049 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
1052 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
1056 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
1059 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
1061 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
1063 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
1066 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
1069 struct device *dev = &msm_host->pdev->dev;
1071 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
1073 reinit_completion(&msm_host->video_comp);
1075 ret = wait_for_completion_timeout(&msm_host->video_comp,
1076 msecs_to_jiffies(70));
1079 DRM_DEV_ERROR(dev, "wait for video done timed out\n");
1081 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
1084 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
1088 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
1091 data = dsi_read(msm_host, REG_DSI_STATUS0);
1093 /* if video mode engine is not busy, its because
1094 * either timing engine was not turned on or the
1095 * DSI controller has finished transmitting the video
1096 * data already, so no need to wait in those cases
1098 if (!(data & DSI_STATUS0_VIDEO_MODE_ENGINE_BUSY))
1101 if (msm_host->power_on && msm_host->enabled) {
1102 dsi_wait4video_done(msm_host);
1103 /* delay 4 ms to skip BLLP */
1104 usleep_range(2000, 4000);
1108 int dsi_tx_buf_alloc_6g(struct msm_dsi_host *msm_host, int size)
1110 struct drm_device *dev = msm_host->dev;
1111 struct msm_drm_private *priv = dev->dev_private;
1115 msm_host->aspace = msm_gem_address_space_get(priv->kms->aspace);
1117 data = msm_gem_kernel_new(dev, size, MSM_BO_WC,
1119 &msm_host->tx_gem_obj, &iova);
1122 msm_host->tx_gem_obj = NULL;
1123 return PTR_ERR(data);
1126 msm_gem_object_set_name(msm_host->tx_gem_obj, "tx_gem");
1128 msm_host->tx_size = msm_host->tx_gem_obj->size;
1133 int dsi_tx_buf_alloc_v2(struct msm_dsi_host *msm_host, int size)
1135 struct drm_device *dev = msm_host->dev;
1137 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1138 &msm_host->tx_buf_paddr, GFP_KERNEL);
1139 if (!msm_host->tx_buf)
1142 msm_host->tx_size = size;
1147 void msm_dsi_tx_buf_free(struct mipi_dsi_host *host)
1149 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1150 struct drm_device *dev = msm_host->dev;
1153 * This is possible if we're tearing down before we've had a chance to
1154 * fully initialize. A very real possibility if our probe is deferred,
1155 * in which case we'll hit msm_dsi_host_destroy() without having run
1156 * through the dsi_tx_buf_alloc().
1161 if (msm_host->tx_gem_obj) {
1162 msm_gem_kernel_put(msm_host->tx_gem_obj, msm_host->aspace);
1163 msm_gem_address_space_put(msm_host->aspace);
1164 msm_host->tx_gem_obj = NULL;
1165 msm_host->aspace = NULL;
1168 if (msm_host->tx_buf)
1169 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1170 msm_host->tx_buf_paddr);
1173 void *dsi_tx_buf_get_6g(struct msm_dsi_host *msm_host)
1175 return msm_gem_get_vaddr(msm_host->tx_gem_obj);
1178 void *dsi_tx_buf_get_v2(struct msm_dsi_host *msm_host)
1180 return msm_host->tx_buf;
1183 void dsi_tx_buf_put_6g(struct msm_dsi_host *msm_host)
1185 msm_gem_put_vaddr(msm_host->tx_gem_obj);
1189 * prepare cmd buffer to be txed
1191 static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1192 const struct mipi_dsi_msg *msg)
1194 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1195 struct mipi_dsi_packet packet;
1200 ret = mipi_dsi_create_packet(&packet, msg);
1202 pr_err("%s: create packet failed, %d\n", __func__, ret);
1205 len = (packet.size + 3) & (~0x3);
1207 if (len > msm_host->tx_size) {
1208 pr_err("%s: packet size is too big\n", __func__);
1212 data = cfg_hnd->ops->tx_buf_get(msm_host);
1214 ret = PTR_ERR(data);
1215 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1219 /* MSM specific command format in memory */
1220 data[0] = packet.header[1];
1221 data[1] = packet.header[2];
1222 data[2] = packet.header[0];
1223 data[3] = BIT(7); /* Last packet */
1224 if (mipi_dsi_packet_format_is_long(msg->type))
1226 if (msg->rx_buf && msg->rx_len)
1230 if (packet.payload && packet.payload_length)
1231 memcpy(data + 4, packet.payload, packet.payload_length);
1233 /* Append 0xff to the end */
1234 if (packet.size < len)
1235 memset(data + packet.size, 0xff, len - packet.size);
1237 if (cfg_hnd->ops->tx_buf_put)
1238 cfg_hnd->ops->tx_buf_put(msm_host);
1244 * dsi_short_read1_resp: 1 parameter
1246 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1248 u8 *data = msg->rx_buf;
1249 if (data && (msg->rx_len >= 1)) {
1250 *data = buf[1]; /* strip out dcs type */
1253 pr_err("%s: read data does not match with rx_buf len %zu\n",
1254 __func__, msg->rx_len);
1260 * dsi_short_read2_resp: 2 parameter
1262 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1264 u8 *data = msg->rx_buf;
1265 if (data && (msg->rx_len >= 2)) {
1266 data[0] = buf[1]; /* strip out dcs type */
1270 pr_err("%s: read data does not match with rx_buf len %zu\n",
1271 __func__, msg->rx_len);
1276 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1278 /* strip out 4 byte dcs header */
1279 if (msg->rx_buf && msg->rx_len)
1280 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1285 int dsi_dma_base_get_6g(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1287 struct drm_device *dev = msm_host->dev;
1288 struct msm_drm_private *priv = dev->dev_private;
1293 return msm_gem_get_and_pin_iova(msm_host->tx_gem_obj,
1294 priv->kms->aspace, dma_base);
1297 int dsi_dma_base_get_v2(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1302 *dma_base = msm_host->tx_buf_paddr;
1306 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1308 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1313 ret = cfg_hnd->ops->dma_base_get(msm_host, &dma_base);
1315 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1319 reinit_completion(&msm_host->dma_comp);
1321 dsi_wait4video_eng_busy(msm_host);
1323 triggered = msm_dsi_manager_cmd_xfer_trigger(
1324 msm_host->id, dma_base, len);
1326 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1327 msecs_to_jiffies(200));
1339 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1340 u8 *buf, int rx_byte, int pkt_size)
1346 int repeated_bytes = 0;
1347 int buf_offset = buf - msm_host->rx_buf;
1350 cnt = (rx_byte + 3) >> 2;
1352 cnt = 4; /* 4 x 32 bits registers only */
1357 read_cnt = pkt_size + 6;
1360 * In case of multiple reads from the panel, after the first read, there
1361 * is possibility that there are some bytes in the payload repeating in
1362 * the RDBK_DATA registers. Since we read all the parameters from the
1363 * panel right from the first byte for every pass. We need to skip the
1364 * repeating bytes and then append the new parameters to the rx buffer.
1366 if (read_cnt > 16) {
1368 /* Any data more than 16 bytes will be shifted out.
1369 * The temp read buffer should already contain these bytes.
1370 * The remaining bytes in read buffer are the repeated bytes.
1372 bytes_shifted = read_cnt - 16;
1373 repeated_bytes = buf_offset - bytes_shifted;
1376 for (i = cnt - 1; i >= 0; i--) {
1377 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1378 *temp++ = ntohl(data); /* to host byte order */
1379 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1382 for (i = repeated_bytes; i < 16; i++)
1388 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1389 const struct mipi_dsi_msg *msg)
1392 int bllp_len = msm_host->mode->hdisplay *
1393 dsi_get_bpp(msm_host->format) / 8;
1395 len = dsi_cmd_dma_add(msm_host, msg);
1397 pr_err("%s: failed to add cmd type = 0x%x\n",
1398 __func__, msg->type);
1402 /* for video mode, do not send cmds more than
1403 * one pixel line, since it only transmit it
1406 /* TODO: if the command is sent in LP mode, the bit rate is only
1407 * half of esc clk rate. In this case, if the video is already
1408 * actively streaming, we need to check more carefully if the
1409 * command can be fit into one BLLP.
1411 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1412 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1417 ret = dsi_cmd_dma_tx(msm_host, len);
1419 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d, ret=%d\n",
1420 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len, ret);
1422 } else if (ret < len) {
1423 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, ret=%d len=%d\n",
1424 __func__, msg->type, (*(u8 *)(msg->tx_buf)), ret, len);
1431 static void dsi_err_worker(struct work_struct *work)
1433 struct msm_dsi_host *msm_host =
1434 container_of(work, struct msm_dsi_host, err_work);
1435 u32 status = msm_host->err_work_state;
1437 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1438 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1439 dsi_sw_reset(msm_host);
1441 /* It is safe to clear here because error irq is disabled. */
1442 msm_host->err_work_state = 0;
1444 /* enable dsi error interrupt */
1445 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1448 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1452 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1455 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1456 /* Writing of an extra 0 needed to clear error bits */
1457 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1458 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1462 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1466 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1469 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1470 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1474 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1478 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1480 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1481 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1482 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1483 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1484 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1485 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1486 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1490 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1494 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1496 /* fifo underflow, overflow */
1498 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1499 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1500 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1501 msm_host->err_work_state |=
1502 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1506 static void dsi_status(struct msm_dsi_host *msm_host)
1510 status = dsi_read(msm_host, REG_DSI_STATUS0);
1512 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1513 dsi_write(msm_host, REG_DSI_STATUS0, status);
1514 msm_host->err_work_state |=
1515 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1519 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1523 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1525 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1526 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1527 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1531 static void dsi_error(struct msm_dsi_host *msm_host)
1533 /* disable dsi error interrupt */
1534 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1536 dsi_clk_status(msm_host);
1537 dsi_fifo_status(msm_host);
1538 dsi_ack_err_status(msm_host);
1539 dsi_timeout_status(msm_host);
1540 dsi_status(msm_host);
1541 dsi_dln0_phy_err(msm_host);
1543 queue_work(msm_host->workqueue, &msm_host->err_work);
1546 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1548 struct msm_dsi_host *msm_host = ptr;
1550 unsigned long flags;
1552 if (!msm_host->ctrl_base)
1555 spin_lock_irqsave(&msm_host->intr_lock, flags);
1556 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1557 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1558 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1560 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1562 if (isr & DSI_IRQ_ERROR)
1563 dsi_error(msm_host);
1565 if (isr & DSI_IRQ_VIDEO_DONE)
1566 complete(&msm_host->video_comp);
1568 if (isr & DSI_IRQ_CMD_DMA_DONE)
1569 complete(&msm_host->dma_comp);
1574 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1575 struct device *panel_device)
1577 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1580 if (IS_ERR(msm_host->disp_en_gpio)) {
1581 DBG("cannot get disp-enable-gpios %ld",
1582 PTR_ERR(msm_host->disp_en_gpio));
1583 return PTR_ERR(msm_host->disp_en_gpio);
1586 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1588 if (IS_ERR(msm_host->te_gpio)) {
1589 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1590 return PTR_ERR(msm_host->te_gpio);
1596 static int dsi_host_attach(struct mipi_dsi_host *host,
1597 struct mipi_dsi_device *dsi)
1599 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1602 if (dsi->lanes > msm_host->num_data_lanes)
1605 msm_host->channel = dsi->channel;
1606 msm_host->lanes = dsi->lanes;
1607 msm_host->format = dsi->format;
1608 msm_host->mode_flags = dsi->mode_flags;
1610 msm_host->dsc = dsi->dsc;
1612 /* Some gpios defined in panel DT need to be controlled by host */
1613 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1617 ret = dsi_dev_attach(msm_host->pdev);
1621 DBG("id=%d", msm_host->id);
1626 static int dsi_host_detach(struct mipi_dsi_host *host,
1627 struct mipi_dsi_device *dsi)
1629 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1631 dsi_dev_detach(msm_host->pdev);
1633 DBG("id=%d", msm_host->id);
1638 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1639 const struct mipi_dsi_msg *msg)
1641 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1644 if (!msg || !msm_host->power_on)
1647 mutex_lock(&msm_host->cmd_mutex);
1648 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1649 mutex_unlock(&msm_host->cmd_mutex);
1654 static const struct mipi_dsi_host_ops dsi_host_ops = {
1655 .attach = dsi_host_attach,
1656 .detach = dsi_host_detach,
1657 .transfer = dsi_host_transfer,
1661 * List of supported physical to logical lane mappings.
1662 * For example, the 2nd entry represents the following mapping:
1664 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1666 static const int supported_data_lane_swaps[][4] = {
1677 static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1678 struct device_node *ep)
1680 struct device *dev = &msm_host->pdev->dev;
1681 struct property *prop;
1683 int ret, i, len, num_lanes;
1685 prop = of_find_property(ep, "data-lanes", &len);
1688 "failed to find data lane mapping, using default\n");
1689 /* Set the number of date lanes to 4 by default. */
1690 msm_host->num_data_lanes = 4;
1694 num_lanes = drm_of_get_data_lanes_count(ep, 1, 4);
1695 if (num_lanes < 0) {
1696 DRM_DEV_ERROR(dev, "bad number of data lanes\n");
1700 msm_host->num_data_lanes = num_lanes;
1702 ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
1705 DRM_DEV_ERROR(dev, "failed to read lane data\n");
1710 * compare DT specified physical-logical lane mappings with the ones
1711 * supported by hardware
1713 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1714 const int *swap = supported_data_lane_swaps[i];
1718 * the data-lanes array we get from DT has a logical->physical
1719 * mapping. The "data lane swap" register field represents
1720 * supported configurations in a physical->logical mapping.
1721 * Translate the DT mapping to what we understand and find a
1722 * configuration that works.
1724 for (j = 0; j < num_lanes; j++) {
1725 if (lane_map[j] < 0 || lane_map[j] > 3)
1726 DRM_DEV_ERROR(dev, "bad physical lane entry %u\n",
1729 if (swap[lane_map[j]] != j)
1733 if (j == num_lanes) {
1734 msm_host->dlane_swap = i;
1742 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc)
1746 if (dsc->bits_per_pixel & 0xf) {
1747 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support fractional bits_per_pixel\n");
1751 if (dsc->bits_per_component != 8) {
1752 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support bits_per_component != 8 yet\n");
1756 dsc->simple_422 = 0;
1757 dsc->convert_rgb = 1;
1758 dsc->vbr_enable = 0;
1760 drm_dsc_set_const_params(dsc);
1761 drm_dsc_set_rc_buf_thresh(dsc);
1763 /* handle only bpp = bpc = 8, pre-SCR panels */
1764 ret = drm_dsc_setup_rc_params(dsc, DRM_DSC_1_1_PRE_SCR);
1766 DRM_DEV_ERROR(&msm_host->pdev->dev, "could not find DSC RC parameters\n");
1770 dsc->initial_scale_value = drm_dsc_initial_scale_value(dsc);
1771 dsc->line_buf_depth = dsc->bits_per_component + 1;
1773 return drm_dsc_compute_rc_parameters(dsc);
1776 static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1778 struct device *dev = &msm_host->pdev->dev;
1779 struct device_node *np = dev->of_node;
1780 struct device_node *endpoint;
1784 * Get the endpoint of the output port of the DSI host. In our case,
1785 * this is mapped to port number with reg = 1. Don't return an error if
1786 * the remote endpoint isn't defined. It's possible that there is
1787 * nothing connected to the dsi output.
1789 endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
1791 DRM_DEV_DEBUG(dev, "%s: no endpoint\n", __func__);
1795 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1797 DRM_DEV_ERROR(dev, "%s: invalid lane configuration %d\n",
1803 if (of_property_read_bool(np, "syscon-sfpb")) {
1804 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1806 if (IS_ERR(msm_host->sfpb)) {
1807 DRM_DEV_ERROR(dev, "%s: failed to get sfpb regmap\n",
1809 ret = PTR_ERR(msm_host->sfpb);
1814 of_node_put(endpoint);
1819 static int dsi_host_get_id(struct msm_dsi_host *msm_host)
1821 struct platform_device *pdev = msm_host->pdev;
1822 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
1823 struct resource *res;
1826 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
1830 for (i = 0; i < VARIANTS_MAX; i++)
1831 for (j = 0; j < DSI_MAX; j++)
1832 if (cfg->io_start[i][j] == res->start)
1838 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1840 struct msm_dsi_host *msm_host = NULL;
1841 struct platform_device *pdev = msm_dsi->pdev;
1842 const struct msm_dsi_config *cfg;
1845 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1850 msm_host->pdev = pdev;
1851 msm_dsi->host = &msm_host->base;
1853 ret = dsi_host_parse_dt(msm_host);
1855 pr_err("%s: failed to parse dt\n", __func__);
1859 msm_host->ctrl_base = msm_ioremap_size(pdev, "dsi_ctrl", &msm_host->ctrl_size);
1860 if (IS_ERR(msm_host->ctrl_base)) {
1861 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1862 return PTR_ERR(msm_host->ctrl_base);
1865 pm_runtime_enable(&pdev->dev);
1867 msm_host->cfg_hnd = dsi_get_config(msm_host);
1868 if (!msm_host->cfg_hnd) {
1869 pr_err("%s: get config failed\n", __func__);
1872 cfg = msm_host->cfg_hnd->cfg;
1874 msm_host->id = dsi_host_get_id(msm_host);
1875 if (msm_host->id < 0) {
1876 pr_err("%s: unable to identify DSI host index\n", __func__);
1877 return msm_host->id;
1880 /* fixup base address by io offset */
1881 msm_host->ctrl_base += cfg->io_offset;
1883 ret = devm_regulator_bulk_get_const(&pdev->dev, cfg->num_regulators,
1884 cfg->regulator_data,
1885 &msm_host->supplies);
1889 ret = dsi_clk_init(msm_host);
1891 pr_err("%s: unable to initialize dsi clks\n", __func__);
1895 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1896 if (!msm_host->rx_buf) {
1897 pr_err("%s: alloc rx temp buf failed\n", __func__);
1901 ret = devm_pm_opp_set_clkname(&pdev->dev, "byte");
1904 /* OPP table is optional */
1905 ret = devm_pm_opp_of_add_table(&pdev->dev);
1906 if (ret && ret != -ENODEV) {
1907 dev_err(&pdev->dev, "invalid OPP table in device tree\n");
1911 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1912 if (!msm_host->irq) {
1913 dev_err(&pdev->dev, "failed to get irq\n");
1917 /* do not autoenable, will be enabled later */
1918 ret = devm_request_irq(&pdev->dev, msm_host->irq, dsi_host_irq,
1919 IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
1920 "dsi_isr", msm_host);
1922 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1923 msm_host->irq, ret);
1927 init_completion(&msm_host->dma_comp);
1928 init_completion(&msm_host->video_comp);
1929 mutex_init(&msm_host->dev_mutex);
1930 mutex_init(&msm_host->cmd_mutex);
1931 spin_lock_init(&msm_host->intr_lock);
1933 /* setup workqueue */
1934 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1935 if (!msm_host->workqueue)
1938 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1940 msm_dsi->id = msm_host->id;
1942 DBG("Dsi Host %d initialized", msm_host->id);
1946 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1948 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1951 if (msm_host->workqueue) {
1952 destroy_workqueue(msm_host->workqueue);
1953 msm_host->workqueue = NULL;
1956 mutex_destroy(&msm_host->cmd_mutex);
1957 mutex_destroy(&msm_host->dev_mutex);
1959 pm_runtime_disable(&msm_host->pdev->dev);
1962 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
1963 struct drm_device *dev)
1965 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1966 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1969 msm_host->dev = dev;
1971 ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
1973 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
1980 int msm_dsi_host_register(struct mipi_dsi_host *host)
1982 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1985 /* Register mipi dsi host */
1986 if (!msm_host->registered) {
1987 host->dev = &msm_host->pdev->dev;
1988 host->ops = &dsi_host_ops;
1989 ret = mipi_dsi_host_register(host);
1993 msm_host->registered = true;
1999 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
2001 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2003 if (msm_host->registered) {
2004 mipi_dsi_host_unregister(host);
2007 msm_host->registered = false;
2011 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
2012 const struct mipi_dsi_msg *msg)
2014 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2015 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2017 /* TODO: make sure dsi_cmd_mdp is idle.
2018 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
2019 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
2020 * How to handle the old versions? Wait for mdp cmd done?
2024 * mdss interrupt is generated in mdp core clock domain
2025 * mdp clock need to be enabled to receive dsi interrupt
2027 pm_runtime_get_sync(&msm_host->pdev->dev);
2028 cfg_hnd->ops->link_clk_set_rate(msm_host);
2029 cfg_hnd->ops->link_clk_enable(msm_host);
2031 /* TODO: vote for bus bandwidth */
2033 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2034 dsi_set_tx_power_mode(0, msm_host);
2036 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
2037 dsi_write(msm_host, REG_DSI_CTRL,
2038 msm_host->dma_cmd_ctrl_restore |
2039 DSI_CTRL_CMD_MODE_EN |
2041 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
2046 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
2047 const struct mipi_dsi_msg *msg)
2049 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2050 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2052 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
2053 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
2055 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2056 dsi_set_tx_power_mode(1, msm_host);
2058 /* TODO: unvote for bus bandwidth */
2060 cfg_hnd->ops->link_clk_disable(msm_host);
2061 pm_runtime_put(&msm_host->pdev->dev);
2064 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
2065 const struct mipi_dsi_msg *msg)
2067 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2069 return dsi_cmds2buf_tx(msm_host, msg);
2072 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
2073 const struct mipi_dsi_msg *msg)
2075 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2076 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2077 int data_byte, rx_byte, dlen, end;
2078 int short_response, diff, pkt_size, ret = 0;
2080 int rlen = msg->rx_len;
2089 data_byte = 10; /* first read */
2090 if (rlen < data_byte)
2093 pkt_size = data_byte;
2094 rx_byte = data_byte + 6; /* 4 header + 2 crc */
2097 buf = msm_host->rx_buf;
2100 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
2101 struct mipi_dsi_msg max_pkt_size_msg = {
2102 .channel = msg->channel,
2103 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
2108 DBG("rlen=%d pkt_size=%d rx_byte=%d",
2109 rlen, pkt_size, rx_byte);
2111 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
2113 pr_err("%s: Set max pkt size failed, %d\n",
2118 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
2119 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
2120 /* Clear the RDBK_DATA registers */
2121 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
2122 DSI_RDBK_DATA_CTRL_CLR);
2123 wmb(); /* make sure the RDBK registers are cleared */
2124 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
2125 wmb(); /* release cleared status before transfer */
2128 ret = dsi_cmds2buf_tx(msm_host, msg);
2130 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
2132 } else if (ret < msg->tx_len) {
2133 pr_err("%s: Read cmd Tx failed, too short: %d\n", __func__, ret);
2138 * once cmd_dma_done interrupt received,
2139 * return data from client is ready and stored
2140 * at RDBK_DATA register already
2141 * since rx fifo is 16 bytes, dcs header is kept at first loop,
2142 * after that dcs header lost during shift into registers
2144 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
2152 if (rlen <= data_byte) {
2153 diff = data_byte - rlen;
2161 dlen -= 2; /* 2 crc */
2163 buf += dlen; /* next start position */
2164 data_byte = 14; /* NOT first read */
2165 if (rlen < data_byte)
2168 pkt_size += data_byte;
2169 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
2174 * For single Long read, if the requested rlen < 10,
2175 * we need to shift the start position of rx
2176 * data buffer to skip the bytes which are not
2179 if (pkt_size < 10 && !short_response)
2180 buf = msm_host->rx_buf + (10 - rlen);
2182 buf = msm_host->rx_buf;
2186 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2187 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2190 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2191 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2192 ret = dsi_short_read1_resp(buf, msg);
2194 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2195 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2196 ret = dsi_short_read2_resp(buf, msg);
2198 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2199 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2200 ret = dsi_long_read_resp(buf, msg);
2203 pr_warn("%s:Invalid response cmd\n", __func__);
2210 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2213 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2215 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2216 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2217 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2219 /* Make sure trigger happens */
2223 void msm_dsi_host_set_phy_mode(struct mipi_dsi_host *host,
2224 struct msm_dsi_phy *src_phy)
2226 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2228 msm_host->cphy_mode = src_phy->cphy_mode;
2231 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
2233 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2236 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
2237 /* Make sure fully reset */
2240 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
2244 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
2245 struct msm_dsi_phy_clk_request *clk_req,
2248 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2249 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2252 ret = cfg_hnd->ops->calc_clk_rate(msm_host, is_bonded_dsi);
2254 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2258 /* CPHY transmits 16 bits over 7 clock cycles
2259 * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
2260 * so multiply by 7 to get the "bitclk rate"
2262 if (msm_host->cphy_mode)
2263 clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
2265 clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
2266 clk_req->escclk_rate = msm_host->esc_clk_rate;
2269 void msm_dsi_host_enable_irq(struct mipi_dsi_host *host)
2271 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2273 enable_irq(msm_host->irq);
2276 void msm_dsi_host_disable_irq(struct mipi_dsi_host *host)
2278 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2280 disable_irq(msm_host->irq);
2283 int msm_dsi_host_enable(struct mipi_dsi_host *host)
2285 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2287 dsi_op_mode_config(msm_host,
2288 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2290 /* TODO: clock should be turned off for command mode,
2291 * and only turned on before MDP START.
2292 * This part of code should be enabled once mdp driver support it.
2294 /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
2295 * dsi_link_clk_disable(msm_host);
2296 * pm_runtime_put(&msm_host->pdev->dev);
2299 msm_host->enabled = true;
2303 int msm_dsi_host_disable(struct mipi_dsi_host *host)
2305 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2307 msm_host->enabled = false;
2308 dsi_op_mode_config(msm_host,
2309 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2311 /* Since we have disabled INTF, the video engine won't stop so that
2312 * the cmd engine will be blocked.
2313 * Reset to disable video engine so that we can send off cmd.
2315 dsi_sw_reset(msm_host);
2320 static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2322 enum sfpb_ahb_arb_master_port_en en;
2324 if (!msm_host->sfpb)
2327 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2329 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2330 SFPB_GPREG_MASTER_PORT_EN__MASK,
2331 SFPB_GPREG_MASTER_PORT_EN(en));
2334 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
2335 struct msm_dsi_phy_shared_timings *phy_shared_timings,
2336 bool is_bonded_dsi, struct msm_dsi_phy *phy)
2338 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2339 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2342 mutex_lock(&msm_host->dev_mutex);
2343 if (msm_host->power_on) {
2344 DBG("dsi host already on");
2348 msm_host->byte_intf_clk_rate = msm_host->byte_clk_rate;
2349 if (phy_shared_timings->byte_intf_clk_div_2)
2350 msm_host->byte_intf_clk_rate /= 2;
2352 msm_dsi_sfpb_config(msm_host, true);
2354 ret = regulator_bulk_enable(msm_host->cfg_hnd->cfg->num_regulators,
2355 msm_host->supplies);
2357 pr_err("%s:Failed to enable vregs.ret=%d\n",
2362 pm_runtime_get_sync(&msm_host->pdev->dev);
2363 ret = cfg_hnd->ops->link_clk_set_rate(msm_host);
2365 ret = cfg_hnd->ops->link_clk_enable(msm_host);
2367 pr_err("%s: failed to enable link clocks. ret=%d\n",
2369 goto fail_disable_reg;
2372 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2374 pr_err("%s: failed to set pinctrl default state, %d\n",
2376 goto fail_disable_clk;
2379 dsi_timing_setup(msm_host, is_bonded_dsi);
2380 dsi_sw_reset(msm_host);
2381 dsi_ctrl_enable(msm_host, phy_shared_timings, phy);
2383 if (msm_host->disp_en_gpio)
2384 gpiod_set_value(msm_host->disp_en_gpio, 1);
2386 msm_host->power_on = true;
2387 mutex_unlock(&msm_host->dev_mutex);
2392 cfg_hnd->ops->link_clk_disable(msm_host);
2393 pm_runtime_put(&msm_host->pdev->dev);
2395 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2396 msm_host->supplies);
2398 mutex_unlock(&msm_host->dev_mutex);
2402 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2404 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2405 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2407 mutex_lock(&msm_host->dev_mutex);
2408 if (!msm_host->power_on) {
2409 DBG("dsi host already off");
2413 dsi_ctrl_disable(msm_host);
2415 if (msm_host->disp_en_gpio)
2416 gpiod_set_value(msm_host->disp_en_gpio, 0);
2418 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2420 cfg_hnd->ops->link_clk_disable(msm_host);
2421 pm_runtime_put(&msm_host->pdev->dev);
2423 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2424 msm_host->supplies);
2426 msm_dsi_sfpb_config(msm_host, false);
2430 msm_host->power_on = false;
2433 mutex_unlock(&msm_host->dev_mutex);
2437 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2438 const struct drm_display_mode *mode)
2440 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2442 if (msm_host->mode) {
2443 drm_mode_destroy(msm_host->dev, msm_host->mode);
2444 msm_host->mode = NULL;
2447 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2448 if (!msm_host->mode) {
2449 pr_err("%s: cannot duplicate mode\n", __func__);
2456 enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
2457 const struct drm_display_mode *mode)
2459 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2460 struct drm_dsc_config *dsc = msm_host->dsc;
2461 int pic_width = mode->hdisplay;
2462 int pic_height = mode->vdisplay;
2467 if (pic_width % dsc->slice_width) {
2468 pr_err("DSI: pic_width %d has to be multiple of slice %d\n",
2469 pic_width, dsc->slice_width);
2470 return MODE_H_ILLEGAL;
2473 if (pic_height % dsc->slice_height) {
2474 pr_err("DSI: pic_height %d has to be multiple of slice %d\n",
2475 pic_height, dsc->slice_height);
2476 return MODE_V_ILLEGAL;
2482 unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
2484 return to_msm_dsi_host(host)->mode_flags;
2487 void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
2489 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2491 pm_runtime_get_sync(&msm_host->pdev->dev);
2493 msm_disp_snapshot_add_block(disp_state, msm_host->ctrl_size,
2494 msm_host->ctrl_base, "dsi%d_ctrl", msm_host->id);
2496 pm_runtime_put_sync(&msm_host->pdev->dev);
2499 static void msm_dsi_host_video_test_pattern_setup(struct msm_dsi_host *msm_host)
2503 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2505 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_VIDEO_INIT_VAL, 0xff);
2506 /* draw checkered rectangle pattern */
2507 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL,
2508 DSI_TPG_MAIN_CONTROL_CHECKERED_RECTANGLE_PATTERN);
2509 /* use 24-bit RGB test pttern */
2510 dsi_write(msm_host, REG_DSI_TPG_VIDEO_CONFIG,
2511 DSI_TPG_VIDEO_CONFIG_BPP(VIDEO_CONFIG_24BPP) |
2512 DSI_TPG_VIDEO_CONFIG_RGB);
2514 reg |= DSI_TEST_PATTERN_GEN_CTRL_VIDEO_PATTERN_SEL(VID_MDSS_GENERAL_PATTERN);
2515 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2517 DBG("Video test pattern setup done\n");
2520 static void msm_dsi_host_cmd_test_pattern_setup(struct msm_dsi_host *msm_host)
2524 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2526 /* initial value for test pattern */
2527 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_MDP_INIT_VAL0, 0xff);
2529 reg |= DSI_TEST_PATTERN_GEN_CTRL_CMD_MDP_STREAM0_PATTERN_SEL(CMD_MDP_MDSS_GENERAL_PATTERN);
2531 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2532 /* draw checkered rectangle pattern */
2533 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL2,
2534 DSI_TPG_MAIN_CONTROL2_CMD_MDP0_CHECKERED_RECTANGLE_PATTERN);
2536 DBG("Cmd test pattern setup done\n");
2539 void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host)
2541 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2542 bool is_video_mode = !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO);
2546 msm_dsi_host_video_test_pattern_setup(msm_host);
2548 msm_dsi_host_cmd_test_pattern_setup(msm_host);
2550 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2551 /* enable the test pattern generator */
2552 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, (reg | DSI_TEST_PATTERN_GEN_CTRL_EN));
2554 /* for command mode need to trigger one frame from tpg */
2556 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER,
2557 DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER_SW_TRIGGER);
2560 struct drm_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host)
2562 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2564 return msm_host->dsc;