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>
13 #include <linux/of_device.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>
33 #include "phy/dsi_phy.h"
35 #define DSI_RESET_TOGGLE_DELAY_MS 20
37 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc);
39 static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
47 * From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
48 * makes all other registers 4-byte shifted down.
50 * In order to identify between DSI6G(v3) and beyond, and DSIv2 and
51 * older, we read the DSI_VERSION register without any shift(offset
52 * 0x1f0). In the case of DSIv2, this hast to be a non-zero value. In
53 * the case of DSI6G, this has to be zero (the offset points to a
54 * scratch register which we never touch)
57 ver = msm_readl(base + REG_DSI_VERSION);
59 /* older dsi host, there is no register shift */
60 ver = FIELD(ver, DSI_VERSION_MAJOR);
61 if (ver <= MSM_DSI_VER_MAJOR_V2) {
71 * newer host, offset 0 has 6G_HW_VERSION, the rest of the
72 * registers are shifted down, read DSI_VERSION again with
75 ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
76 ver = FIELD(ver, DSI_VERSION_MAJOR);
77 if (ver == MSM_DSI_VER_MAJOR_6G) {
80 *minor = msm_readl(base + REG_DSI_6G_HW_VERSION);
88 #define DSI_ERR_STATE_ACK 0x0000
89 #define DSI_ERR_STATE_TIMEOUT 0x0001
90 #define DSI_ERR_STATE_DLN0_PHY 0x0002
91 #define DSI_ERR_STATE_FIFO 0x0004
92 #define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
93 #define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
94 #define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
96 #define DSI_CLK_CTRL_ENABLE_CLKS \
97 (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
98 DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
99 DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
100 DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
102 struct msm_dsi_host {
103 struct mipi_dsi_host base;
105 struct platform_device *pdev;
106 struct drm_device *dev;
110 void __iomem *ctrl_base;
111 phys_addr_t ctrl_size;
112 struct regulator_bulk_data *supplies;
115 struct clk_bulk_data bus_clks[DSI_BUS_CLK_MAX];
117 struct clk *byte_clk;
119 struct clk *pixel_clk;
120 struct clk *byte_clk_src;
121 struct clk *pixel_clk_src;
122 struct clk *byte_intf_clk;
124 unsigned long byte_clk_rate;
125 unsigned long pixel_clk_rate;
126 unsigned long esc_clk_rate;
128 /* DSI v2 specific clocks */
130 struct clk *esc_clk_src;
131 struct clk *dsi_clk_src;
133 unsigned long src_clk_rate;
135 struct gpio_desc *disp_en_gpio;
136 struct gpio_desc *te_gpio;
138 const struct msm_dsi_cfg_handler *cfg_hnd;
140 struct completion dma_comp;
141 struct completion video_comp;
142 struct mutex dev_mutex;
143 struct mutex cmd_mutex;
144 spinlock_t intr_lock; /* Protect interrupt ctrl register */
147 struct work_struct err_work;
148 struct workqueue_struct *workqueue;
150 /* DSI 6G TX buffer*/
151 struct drm_gem_object *tx_gem_obj;
152 struct msm_gem_address_space *aspace;
154 /* DSI v2 TX buffer */
156 dma_addr_t tx_buf_paddr;
164 struct drm_display_mode *mode;
165 struct drm_dsc_config *dsc;
167 /* connected device info */
168 unsigned int channel;
170 enum mipi_dsi_pixel_format format;
171 unsigned long mode_flags;
173 /* lane data parsed via DT */
180 u32 dma_cmd_ctrl_restore;
188 static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
191 case MIPI_DSI_FMT_RGB565: return 16;
192 case MIPI_DSI_FMT_RGB666_PACKED: return 18;
193 case MIPI_DSI_FMT_RGB666:
194 case MIPI_DSI_FMT_RGB888:
199 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
201 return msm_readl(msm_host->ctrl_base + reg);
203 static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
205 msm_writel(data, msm_host->ctrl_base + reg);
208 static const struct msm_dsi_cfg_handler *dsi_get_config(
209 struct msm_dsi_host *msm_host)
211 const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
212 struct device *dev = &msm_host->pdev->dev;
215 u32 major = 0, minor = 0;
217 cfg_hnd = device_get_match_data(dev);
221 ahb_clk = msm_clk_get(msm_host->pdev, "iface");
222 if (IS_ERR(ahb_clk)) {
223 pr_err("%s: cannot get interface clock\n", __func__);
227 pm_runtime_get_sync(dev);
229 ret = clk_prepare_enable(ahb_clk);
231 pr_err("%s: unable to enable ahb_clk\n", __func__);
235 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
237 pr_err("%s: Invalid version\n", __func__);
241 cfg_hnd = msm_dsi_cfg_get(major, minor);
243 DBG("%s: Version %x:%x\n", __func__, major, minor);
246 clk_disable_unprepare(ahb_clk);
248 pm_runtime_put_sync(dev);
253 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
255 return container_of(host, struct msm_dsi_host, base);
258 int dsi_clk_init_v2(struct msm_dsi_host *msm_host)
260 struct platform_device *pdev = msm_host->pdev;
263 msm_host->src_clk = msm_clk_get(pdev, "src");
265 if (IS_ERR(msm_host->src_clk)) {
266 ret = PTR_ERR(msm_host->src_clk);
267 pr_err("%s: can't find src clock. ret=%d\n",
269 msm_host->src_clk = NULL;
273 msm_host->esc_clk_src = clk_get_parent(msm_host->esc_clk);
274 if (!msm_host->esc_clk_src) {
276 pr_err("%s: can't get esc clock parent. ret=%d\n",
281 msm_host->dsi_clk_src = clk_get_parent(msm_host->src_clk);
282 if (!msm_host->dsi_clk_src) {
284 pr_err("%s: can't get src clock parent. ret=%d\n",
291 int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host)
293 struct platform_device *pdev = msm_host->pdev;
296 msm_host->byte_intf_clk = msm_clk_get(pdev, "byte_intf");
297 if (IS_ERR(msm_host->byte_intf_clk)) {
298 ret = PTR_ERR(msm_host->byte_intf_clk);
299 pr_err("%s: can't find byte_intf clock. ret=%d\n",
306 static int dsi_clk_init(struct msm_dsi_host *msm_host)
308 struct platform_device *pdev = msm_host->pdev;
309 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
310 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
314 for (i = 0; i < cfg->num_bus_clks; i++)
315 msm_host->bus_clks[i].id = cfg->bus_clk_names[i];
316 msm_host->num_bus_clks = cfg->num_bus_clks;
318 ret = devm_clk_bulk_get(&pdev->dev, msm_host->num_bus_clks, msm_host->bus_clks);
320 dev_err(&pdev->dev, "Unable to get clocks, ret = %d\n", ret);
324 /* get link and source clocks */
325 msm_host->byte_clk = msm_clk_get(pdev, "byte");
326 if (IS_ERR(msm_host->byte_clk)) {
327 ret = PTR_ERR(msm_host->byte_clk);
328 pr_err("%s: can't find dsi_byte clock. ret=%d\n",
330 msm_host->byte_clk = NULL;
334 msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
335 if (IS_ERR(msm_host->pixel_clk)) {
336 ret = PTR_ERR(msm_host->pixel_clk);
337 pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
339 msm_host->pixel_clk = NULL;
343 msm_host->esc_clk = msm_clk_get(pdev, "core");
344 if (IS_ERR(msm_host->esc_clk)) {
345 ret = PTR_ERR(msm_host->esc_clk);
346 pr_err("%s: can't find dsi_esc clock. ret=%d\n",
348 msm_host->esc_clk = NULL;
352 msm_host->byte_clk_src = clk_get_parent(msm_host->byte_clk);
353 if (IS_ERR(msm_host->byte_clk_src)) {
354 ret = PTR_ERR(msm_host->byte_clk_src);
355 pr_err("%s: can't find byte_clk clock. ret=%d\n", __func__, ret);
359 msm_host->pixel_clk_src = clk_get_parent(msm_host->pixel_clk);
360 if (IS_ERR(msm_host->pixel_clk_src)) {
361 ret = PTR_ERR(msm_host->pixel_clk_src);
362 pr_err("%s: can't find pixel_clk clock. ret=%d\n", __func__, ret);
366 if (cfg_hnd->ops->clk_init_ver)
367 ret = cfg_hnd->ops->clk_init_ver(msm_host);
372 int msm_dsi_runtime_suspend(struct device *dev)
374 struct platform_device *pdev = to_platform_device(dev);
375 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
376 struct mipi_dsi_host *host = msm_dsi->host;
377 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
379 if (!msm_host->cfg_hnd)
382 clk_bulk_disable_unprepare(msm_host->num_bus_clks, msm_host->bus_clks);
387 int msm_dsi_runtime_resume(struct device *dev)
389 struct platform_device *pdev = to_platform_device(dev);
390 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
391 struct mipi_dsi_host *host = msm_dsi->host;
392 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
394 if (!msm_host->cfg_hnd)
397 return clk_bulk_prepare_enable(msm_host->num_bus_clks, msm_host->bus_clks);
400 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
402 unsigned long byte_intf_rate;
405 DBG("Set clk rates: pclk=%d, byteclk=%lu",
406 msm_host->mode->clock, msm_host->byte_clk_rate);
408 ret = dev_pm_opp_set_rate(&msm_host->pdev->dev,
409 msm_host->byte_clk_rate);
411 pr_err("%s: dev_pm_opp_set_rate failed %d\n", __func__, ret);
415 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
417 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
421 if (msm_host->byte_intf_clk) {
422 /* For CPHY, byte_intf_clk is same as byte_clk */
423 if (msm_host->cphy_mode)
424 byte_intf_rate = msm_host->byte_clk_rate;
426 byte_intf_rate = msm_host->byte_clk_rate / 2;
428 ret = clk_set_rate(msm_host->byte_intf_clk, byte_intf_rate);
430 pr_err("%s: Failed to set rate byte intf clk, %d\n",
440 int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
444 ret = clk_prepare_enable(msm_host->esc_clk);
446 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
450 ret = clk_prepare_enable(msm_host->byte_clk);
452 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
456 ret = clk_prepare_enable(msm_host->pixel_clk);
458 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
462 ret = clk_prepare_enable(msm_host->byte_intf_clk);
464 pr_err("%s: Failed to enable byte intf clk\n",
466 goto byte_intf_clk_err;
472 clk_disable_unprepare(msm_host->pixel_clk);
474 clk_disable_unprepare(msm_host->byte_clk);
476 clk_disable_unprepare(msm_host->esc_clk);
481 int dsi_link_clk_set_rate_v2(struct msm_dsi_host *msm_host)
485 DBG("Set clk rates: pclk=%d, byteclk=%lu, esc_clk=%lu, dsi_src_clk=%lu",
486 msm_host->mode->clock, msm_host->byte_clk_rate,
487 msm_host->esc_clk_rate, msm_host->src_clk_rate);
489 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
491 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
495 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
497 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
501 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
503 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
507 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
509 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
516 int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
520 ret = clk_prepare_enable(msm_host->byte_clk);
522 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
526 ret = clk_prepare_enable(msm_host->esc_clk);
528 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
532 ret = clk_prepare_enable(msm_host->src_clk);
534 pr_err("%s: Failed to enable dsi src clk\n", __func__);
538 ret = clk_prepare_enable(msm_host->pixel_clk);
540 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
547 clk_disable_unprepare(msm_host->src_clk);
549 clk_disable_unprepare(msm_host->esc_clk);
551 clk_disable_unprepare(msm_host->byte_clk);
556 void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host)
558 /* Drop the performance state vote */
559 dev_pm_opp_set_rate(&msm_host->pdev->dev, 0);
560 clk_disable_unprepare(msm_host->esc_clk);
561 clk_disable_unprepare(msm_host->pixel_clk);
562 clk_disable_unprepare(msm_host->byte_intf_clk);
563 clk_disable_unprepare(msm_host->byte_clk);
566 void dsi_link_clk_disable_v2(struct msm_dsi_host *msm_host)
568 clk_disable_unprepare(msm_host->pixel_clk);
569 clk_disable_unprepare(msm_host->src_clk);
570 clk_disable_unprepare(msm_host->esc_clk);
571 clk_disable_unprepare(msm_host->byte_clk);
574 static unsigned long dsi_get_pclk_rate(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
576 struct drm_display_mode *mode = msm_host->mode;
577 unsigned long pclk_rate;
579 pclk_rate = mode->clock * 1000;
582 * For bonded DSI mode, the current DRM mode has the complete width of the
583 * panel. Since, the complete panel is driven by two DSI controllers,
584 * the clock rates have to be split between the two dsi controllers.
585 * Adjust the byte and pixel clock rates for each dsi host accordingly.
593 static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
595 u8 lanes = msm_host->lanes;
596 u32 bpp = dsi_get_bpp(msm_host->format);
597 unsigned long pclk_rate = dsi_get_pclk_rate(msm_host, is_bonded_dsi);
598 u64 pclk_bpp = (u64)pclk_rate * bpp;
601 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
605 /* CPHY "byte_clk" is in units of 16 bits */
606 if (msm_host->cphy_mode)
607 do_div(pclk_bpp, (16 * lanes));
609 do_div(pclk_bpp, (8 * lanes));
611 msm_host->pixel_clk_rate = pclk_rate;
612 msm_host->byte_clk_rate = pclk_bpp;
614 DBG("pclk=%lu, bclk=%lu", msm_host->pixel_clk_rate,
615 msm_host->byte_clk_rate);
619 int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
621 if (!msm_host->mode) {
622 pr_err("%s: mode not set\n", __func__);
626 dsi_calc_pclk(msm_host, is_bonded_dsi);
627 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
631 int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
633 u32 bpp = dsi_get_bpp(msm_host->format);
635 unsigned int esc_mhz, esc_div;
636 unsigned long byte_mhz;
638 dsi_calc_pclk(msm_host, is_bonded_dsi);
640 pclk_bpp = (u64)dsi_get_pclk_rate(msm_host, is_bonded_dsi) * bpp;
642 msm_host->src_clk_rate = pclk_bpp;
645 * esc clock is byte clock followed by a 4 bit divider,
646 * we need to find an escape clock frequency within the
647 * mipi DSI spec range within the maximum divider limit
648 * We iterate here between an escape clock frequencey
649 * between 20 Mhz to 5 Mhz and pick up the first one
650 * that can be supported by our divider
653 byte_mhz = msm_host->byte_clk_rate / 1000000;
655 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
656 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
659 * TODO: Ideally, we shouldn't know what sort of divider
660 * is available in mmss_cc, we're just assuming that
661 * it'll always be a 4 bit divider. Need to come up with
664 if (esc_div >= 1 && esc_div <= 16)
671 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
673 DBG("esc=%lu, src=%lu", msm_host->esc_clk_rate,
674 msm_host->src_clk_rate);
679 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
684 spin_lock_irqsave(&msm_host->intr_lock, flags);
685 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
692 DBG("intr=%x enable=%d", intr, enable);
694 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
695 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
698 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
700 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
702 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
703 return NON_BURST_SYNCH_PULSE;
705 return NON_BURST_SYNCH_EVENT;
708 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
709 const enum mipi_dsi_pixel_format mipi_fmt)
712 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
713 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
714 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
715 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
716 default: return VID_DST_FORMAT_RGB888;
720 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
721 const enum mipi_dsi_pixel_format mipi_fmt)
724 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
725 case MIPI_DSI_FMT_RGB666_PACKED:
726 case MIPI_DSI_FMT_RGB666: return CMD_DST_FORMAT_RGB666;
727 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
728 default: return CMD_DST_FORMAT_RGB888;
732 static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
733 struct msm_dsi_phy_shared_timings *phy_shared_timings, struct msm_dsi_phy *phy)
735 u32 flags = msm_host->mode_flags;
736 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
737 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
738 u32 data = 0, lane_ctrl = 0;
741 dsi_write(msm_host, REG_DSI_CTRL, 0);
745 if (flags & MIPI_DSI_MODE_VIDEO) {
746 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
747 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
748 if (flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
749 data |= DSI_VID_CFG0_HFP_POWER_STOP;
750 if (flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
751 data |= DSI_VID_CFG0_HBP_POWER_STOP;
752 if (flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
753 data |= DSI_VID_CFG0_HSA_POWER_STOP;
754 /* Always set low power stop mode for BLLP
755 * to let command engine send packets
757 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
758 DSI_VID_CFG0_BLLP_POWER_STOP;
759 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
760 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
761 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
762 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
764 /* Do not swap RGB colors */
765 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
766 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
768 /* Do not swap RGB colors */
769 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
770 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
771 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
773 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
774 DSI_CMD_CFG1_WR_MEM_CONTINUE(
775 MIPI_DCS_WRITE_MEMORY_CONTINUE);
776 /* Always insert DCS command */
777 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
778 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
781 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
782 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
783 DSI_CMD_DMA_CTRL_LOW_POWER);
786 /* Always assume dedicated TE pin */
787 data |= DSI_TRIG_CTRL_TE;
788 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
789 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
790 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
791 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
792 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
793 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
794 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
796 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(phy_shared_timings->clk_post) |
797 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(phy_shared_timings->clk_pre);
798 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
800 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
801 (cfg_hnd->minor > MSM_DSI_6G_VER_MINOR_V1_0) &&
802 phy_shared_timings->clk_pre_inc_by_2)
803 dsi_write(msm_host, REG_DSI_T_CLK_PRE_EXTEND,
804 DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK);
807 if (!(flags & MIPI_DSI_MODE_NO_EOT_PACKET))
808 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
809 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
811 /* allow only ack-err-status to generate interrupt */
812 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
814 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
816 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
818 data = DSI_CTRL_CLK_EN;
820 DBG("lane number=%d", msm_host->lanes);
821 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
823 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
824 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
826 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) {
827 lane_ctrl = dsi_read(msm_host, REG_DSI_LANE_CTRL);
829 if (msm_dsi_phy_set_continuous_clock(phy, enable))
830 lane_ctrl &= ~DSI_LANE_CTRL_HS_REQ_SEL_PHY;
832 dsi_write(msm_host, REG_DSI_LANE_CTRL,
833 lane_ctrl | DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
836 data |= DSI_CTRL_ENABLE;
838 dsi_write(msm_host, REG_DSI_CTRL, data);
840 if (msm_host->cphy_mode)
841 dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
844 static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mode, u32 hdisplay)
846 struct drm_dsc_config *dsc = msm_host->dsc;
847 u32 reg, reg_ctrl, reg_ctrl2;
848 u32 slice_per_intf, total_bytes_per_intf;
852 /* first calculate dsc parameters and then program
853 * compress mode registers
855 slice_per_intf = DIV_ROUND_UP(hdisplay, dsc->slice_width);
857 total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
859 eol_byte_num = total_bytes_per_intf % 3;
862 * Typically, pkt_per_line = slice_per_intf * slice_per_pkt.
864 * Since the current driver only supports slice_per_pkt = 1,
865 * pkt_per_line will be equal to slice per intf for now.
867 pkt_per_line = slice_per_intf;
869 if (is_cmd_mode) /* packet data type */
870 reg = DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_LONG_WRITE);
872 reg = DSI_VIDEO_COMPRESSION_MODE_CTRL_DATATYPE(MIPI_DSI_COMPRESSED_PIXEL_STREAM);
874 /* DSI_VIDEO_COMPRESSION_MODE & DSI_COMMAND_COMPRESSION_MODE
875 * registers have similar offsets, so for below common code use
876 * DSI_VIDEO_COMPRESSION_MODE_XXXX for setting bits
878 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_PKT_PER_LINE(pkt_per_line >> 1);
879 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EOL_BYTE_NUM(eol_byte_num);
880 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EN;
883 reg_ctrl = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL);
884 reg_ctrl2 = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2);
889 reg_ctrl2 &= ~DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH__MASK;
890 reg_ctrl2 |= DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH(dsc->slice_chunk_size);
892 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
893 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
895 dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
899 static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
901 struct drm_display_mode *mode = msm_host->mode;
902 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
903 u32 h_total = mode->htotal;
904 u32 v_total = mode->vtotal;
905 u32 hs_end = mode->hsync_end - mode->hsync_start;
906 u32 vs_end = mode->vsync_end - mode->vsync_start;
907 u32 ha_start = h_total - mode->hsync_start;
908 u32 ha_end = ha_start + mode->hdisplay;
909 u32 va_start = v_total - mode->vsync_start;
910 u32 va_end = va_start + mode->vdisplay;
911 u32 hdisplay = mode->hdisplay;
918 * For bonded DSI mode, the current DRM mode has
919 * the complete width of the panel. Since, the complete
920 * panel is driven by two DSI controllers, the horizontal
921 * timings have to be split between the two dsi controllers.
922 * Adjust the DSI host timing values accordingly.
933 struct drm_dsc_config *dsc = msm_host->dsc;
935 /* update dsc params with timing params */
936 if (!dsc || !mode->hdisplay || !mode->vdisplay) {
937 pr_err("DSI: invalid input: pic_width: %d pic_height: %d\n",
938 mode->hdisplay, mode->vdisplay);
942 dsc->pic_width = mode->hdisplay;
943 dsc->pic_height = mode->vdisplay;
944 DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);
946 /* we do the calculations for dsc parameters here so that
947 * panel can use these parameters
949 ret = dsi_populate_dsc_params(msm_host, dsc);
953 /* Divide the display by 3 but keep back/font porch and
959 ha_end = ha_start + hdisplay;
962 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
964 dsi_update_dsc_timing(msm_host, false, mode->hdisplay);
966 dsi_write(msm_host, REG_DSI_ACTIVE_H,
967 DSI_ACTIVE_H_START(ha_start) |
968 DSI_ACTIVE_H_END(ha_end));
969 dsi_write(msm_host, REG_DSI_ACTIVE_V,
970 DSI_ACTIVE_V_START(va_start) |
971 DSI_ACTIVE_V_END(va_end));
972 dsi_write(msm_host, REG_DSI_TOTAL,
973 DSI_TOTAL_H_TOTAL(h_total - 1) |
974 DSI_TOTAL_V_TOTAL(v_total - 1));
976 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
977 DSI_ACTIVE_HSYNC_START(hs_start) |
978 DSI_ACTIVE_HSYNC_END(hs_end));
979 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
980 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
981 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
982 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
983 } else { /* command mode */
985 dsi_update_dsc_timing(msm_host, true, mode->hdisplay);
987 /* image data and 1 byte write_memory_start cmd */
989 wc = hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
992 * When DSC is enabled, WC = slice_chunk_size * slice_per_pkt + 1.
993 * Currently, the driver only supports default value of slice_per_pkt = 1
995 * TODO: Expand mipi_dsi_device struct to hold slice_per_pkt info
996 * and adjust DSC math to account for slice_per_pkt.
998 wc = msm_host->dsc->slice_chunk_size + 1;
1000 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_CTRL,
1001 DSI_CMD_MDP_STREAM0_CTRL_WORD_COUNT(wc) |
1002 DSI_CMD_MDP_STREAM0_CTRL_VIRTUAL_CHANNEL(
1003 msm_host->channel) |
1004 DSI_CMD_MDP_STREAM0_CTRL_DATA_TYPE(
1005 MIPI_DSI_DCS_LONG_WRITE));
1007 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL,
1008 DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) |
1009 DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay));
1013 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
1017 ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1019 if (ctrl & DSI_CTRL_ENABLE) {
1020 dsi_write(msm_host, REG_DSI_CTRL, ctrl & ~DSI_CTRL_ENABLE);
1022 * dsi controller need to be disabled before
1028 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1029 wmb(); /* clocks need to be enabled before reset */
1031 /* dsi controller can only be reset while clocks are running */
1032 dsi_write(msm_host, REG_DSI_RESET, 1);
1033 msleep(DSI_RESET_TOGGLE_DELAY_MS); /* make sure reset happen */
1034 dsi_write(msm_host, REG_DSI_RESET, 0);
1035 wmb(); /* controller out of reset */
1037 if (ctrl & DSI_CTRL_ENABLE) {
1038 dsi_write(msm_host, REG_DSI_CTRL, ctrl);
1039 wmb(); /* make sure dsi controller enabled again */
1043 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
1044 bool video_mode, bool enable)
1048 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1051 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
1052 DSI_CTRL_CMD_MODE_EN);
1053 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
1054 DSI_IRQ_MASK_VIDEO_DONE, 0);
1057 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
1058 } else { /* command mode */
1059 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
1060 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
1062 dsi_ctrl |= DSI_CTRL_ENABLE;
1065 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
1068 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
1072 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
1075 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
1077 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
1079 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
1082 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
1085 struct device *dev = &msm_host->pdev->dev;
1087 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
1089 reinit_completion(&msm_host->video_comp);
1091 ret = wait_for_completion_timeout(&msm_host->video_comp,
1092 msecs_to_jiffies(70));
1095 DRM_DEV_ERROR(dev, "wait for video done timed out\n");
1097 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
1100 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
1104 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
1107 data = dsi_read(msm_host, REG_DSI_STATUS0);
1109 /* if video mode engine is not busy, its because
1110 * either timing engine was not turned on or the
1111 * DSI controller has finished transmitting the video
1112 * data already, so no need to wait in those cases
1114 if (!(data & DSI_STATUS0_VIDEO_MODE_ENGINE_BUSY))
1117 if (msm_host->power_on && msm_host->enabled) {
1118 dsi_wait4video_done(msm_host);
1119 /* delay 4 ms to skip BLLP */
1120 usleep_range(2000, 4000);
1124 int dsi_tx_buf_alloc_6g(struct msm_dsi_host *msm_host, int size)
1126 struct drm_device *dev = msm_host->dev;
1127 struct msm_drm_private *priv = dev->dev_private;
1131 msm_host->aspace = msm_gem_address_space_get(priv->kms->aspace);
1133 data = msm_gem_kernel_new(dev, size, MSM_BO_WC,
1135 &msm_host->tx_gem_obj, &iova);
1138 msm_host->tx_gem_obj = NULL;
1139 return PTR_ERR(data);
1142 msm_gem_object_set_name(msm_host->tx_gem_obj, "tx_gem");
1144 msm_host->tx_size = msm_host->tx_gem_obj->size;
1149 int dsi_tx_buf_alloc_v2(struct msm_dsi_host *msm_host, int size)
1151 struct drm_device *dev = msm_host->dev;
1153 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1154 &msm_host->tx_buf_paddr, GFP_KERNEL);
1155 if (!msm_host->tx_buf)
1158 msm_host->tx_size = size;
1163 void msm_dsi_tx_buf_free(struct mipi_dsi_host *host)
1165 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1166 struct drm_device *dev = msm_host->dev;
1169 * This is possible if we're tearing down before we've had a chance to
1170 * fully initialize. A very real possibility if our probe is deferred,
1171 * in which case we'll hit msm_dsi_host_destroy() without having run
1172 * through the dsi_tx_buf_alloc().
1177 if (msm_host->tx_gem_obj) {
1178 msm_gem_kernel_put(msm_host->tx_gem_obj, msm_host->aspace);
1179 msm_gem_address_space_put(msm_host->aspace);
1180 msm_host->tx_gem_obj = NULL;
1181 msm_host->aspace = NULL;
1184 if (msm_host->tx_buf)
1185 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1186 msm_host->tx_buf_paddr);
1189 void *dsi_tx_buf_get_6g(struct msm_dsi_host *msm_host)
1191 return msm_gem_get_vaddr(msm_host->tx_gem_obj);
1194 void *dsi_tx_buf_get_v2(struct msm_dsi_host *msm_host)
1196 return msm_host->tx_buf;
1199 void dsi_tx_buf_put_6g(struct msm_dsi_host *msm_host)
1201 msm_gem_put_vaddr(msm_host->tx_gem_obj);
1205 * prepare cmd buffer to be txed
1207 static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1208 const struct mipi_dsi_msg *msg)
1210 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1211 struct mipi_dsi_packet packet;
1216 ret = mipi_dsi_create_packet(&packet, msg);
1218 pr_err("%s: create packet failed, %d\n", __func__, ret);
1221 len = (packet.size + 3) & (~0x3);
1223 if (len > msm_host->tx_size) {
1224 pr_err("%s: packet size is too big\n", __func__);
1228 data = cfg_hnd->ops->tx_buf_get(msm_host);
1230 ret = PTR_ERR(data);
1231 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1235 /* MSM specific command format in memory */
1236 data[0] = packet.header[1];
1237 data[1] = packet.header[2];
1238 data[2] = packet.header[0];
1239 data[3] = BIT(7); /* Last packet */
1240 if (mipi_dsi_packet_format_is_long(msg->type))
1242 if (msg->rx_buf && msg->rx_len)
1246 if (packet.payload && packet.payload_length)
1247 memcpy(data + 4, packet.payload, packet.payload_length);
1249 /* Append 0xff to the end */
1250 if (packet.size < len)
1251 memset(data + packet.size, 0xff, len - packet.size);
1253 if (cfg_hnd->ops->tx_buf_put)
1254 cfg_hnd->ops->tx_buf_put(msm_host);
1260 * dsi_short_read1_resp: 1 parameter
1262 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1264 u8 *data = msg->rx_buf;
1265 if (data && (msg->rx_len >= 1)) {
1266 *data = buf[1]; /* strip out dcs type */
1269 pr_err("%s: read data does not match with rx_buf len %zu\n",
1270 __func__, msg->rx_len);
1276 * dsi_short_read2_resp: 2 parameter
1278 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1280 u8 *data = msg->rx_buf;
1281 if (data && (msg->rx_len >= 2)) {
1282 data[0] = buf[1]; /* strip out dcs type */
1286 pr_err("%s: read data does not match with rx_buf len %zu\n",
1287 __func__, msg->rx_len);
1292 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1294 /* strip out 4 byte dcs header */
1295 if (msg->rx_buf && msg->rx_len)
1296 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1301 int dsi_dma_base_get_6g(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1303 struct drm_device *dev = msm_host->dev;
1304 struct msm_drm_private *priv = dev->dev_private;
1309 return msm_gem_get_and_pin_iova(msm_host->tx_gem_obj,
1310 priv->kms->aspace, dma_base);
1313 int dsi_dma_base_get_v2(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1318 *dma_base = msm_host->tx_buf_paddr;
1322 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1324 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1329 ret = cfg_hnd->ops->dma_base_get(msm_host, &dma_base);
1331 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1335 reinit_completion(&msm_host->dma_comp);
1337 dsi_wait4video_eng_busy(msm_host);
1339 triggered = msm_dsi_manager_cmd_xfer_trigger(
1340 msm_host->id, dma_base, len);
1342 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1343 msecs_to_jiffies(200));
1355 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1356 u8 *buf, int rx_byte, int pkt_size)
1362 int repeated_bytes = 0;
1363 int buf_offset = buf - msm_host->rx_buf;
1366 cnt = (rx_byte + 3) >> 2;
1368 cnt = 4; /* 4 x 32 bits registers only */
1373 read_cnt = pkt_size + 6;
1376 * In case of multiple reads from the panel, after the first read, there
1377 * is possibility that there are some bytes in the payload repeating in
1378 * the RDBK_DATA registers. Since we read all the parameters from the
1379 * panel right from the first byte for every pass. We need to skip the
1380 * repeating bytes and then append the new parameters to the rx buffer.
1382 if (read_cnt > 16) {
1384 /* Any data more than 16 bytes will be shifted out.
1385 * The temp read buffer should already contain these bytes.
1386 * The remaining bytes in read buffer are the repeated bytes.
1388 bytes_shifted = read_cnt - 16;
1389 repeated_bytes = buf_offset - bytes_shifted;
1392 for (i = cnt - 1; i >= 0; i--) {
1393 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1394 *temp++ = ntohl(data); /* to host byte order */
1395 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1398 for (i = repeated_bytes; i < 16; i++)
1404 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1405 const struct mipi_dsi_msg *msg)
1408 int bllp_len = msm_host->mode->hdisplay *
1409 dsi_get_bpp(msm_host->format) / 8;
1411 len = dsi_cmd_dma_add(msm_host, msg);
1413 pr_err("%s: failed to add cmd type = 0x%x\n",
1414 __func__, msg->type);
1418 /* for video mode, do not send cmds more than
1419 * one pixel line, since it only transmit it
1422 /* TODO: if the command is sent in LP mode, the bit rate is only
1423 * half of esc clk rate. In this case, if the video is already
1424 * actively streaming, we need to check more carefully if the
1425 * command can be fit into one BLLP.
1427 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1428 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1433 ret = dsi_cmd_dma_tx(msm_host, len);
1435 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d, ret=%d\n",
1436 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len, ret);
1438 } else if (ret < len) {
1439 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, ret=%d len=%d\n",
1440 __func__, msg->type, (*(u8 *)(msg->tx_buf)), ret, len);
1447 static void dsi_err_worker(struct work_struct *work)
1449 struct msm_dsi_host *msm_host =
1450 container_of(work, struct msm_dsi_host, err_work);
1451 u32 status = msm_host->err_work_state;
1453 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1454 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1455 dsi_sw_reset(msm_host);
1457 /* It is safe to clear here because error irq is disabled. */
1458 msm_host->err_work_state = 0;
1460 /* enable dsi error interrupt */
1461 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1464 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1468 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1471 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1472 /* Writing of an extra 0 needed to clear error bits */
1473 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1474 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1478 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1482 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1485 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1486 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1490 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1494 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1496 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1497 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1498 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1499 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1500 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1501 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1502 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1506 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1510 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1512 /* fifo underflow, overflow */
1514 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1515 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1516 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1517 msm_host->err_work_state |=
1518 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1522 static void dsi_status(struct msm_dsi_host *msm_host)
1526 status = dsi_read(msm_host, REG_DSI_STATUS0);
1528 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1529 dsi_write(msm_host, REG_DSI_STATUS0, status);
1530 msm_host->err_work_state |=
1531 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1535 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1539 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1541 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1542 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1543 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1547 static void dsi_error(struct msm_dsi_host *msm_host)
1549 /* disable dsi error interrupt */
1550 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1552 dsi_clk_status(msm_host);
1553 dsi_fifo_status(msm_host);
1554 dsi_ack_err_status(msm_host);
1555 dsi_timeout_status(msm_host);
1556 dsi_status(msm_host);
1557 dsi_dln0_phy_err(msm_host);
1559 queue_work(msm_host->workqueue, &msm_host->err_work);
1562 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1564 struct msm_dsi_host *msm_host = ptr;
1566 unsigned long flags;
1568 if (!msm_host->ctrl_base)
1571 spin_lock_irqsave(&msm_host->intr_lock, flags);
1572 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1573 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1574 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1576 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1578 if (isr & DSI_IRQ_ERROR)
1579 dsi_error(msm_host);
1581 if (isr & DSI_IRQ_VIDEO_DONE)
1582 complete(&msm_host->video_comp);
1584 if (isr & DSI_IRQ_CMD_DMA_DONE)
1585 complete(&msm_host->dma_comp);
1590 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1591 struct device *panel_device)
1593 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1596 if (IS_ERR(msm_host->disp_en_gpio)) {
1597 DBG("cannot get disp-enable-gpios %ld",
1598 PTR_ERR(msm_host->disp_en_gpio));
1599 return PTR_ERR(msm_host->disp_en_gpio);
1602 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1604 if (IS_ERR(msm_host->te_gpio)) {
1605 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1606 return PTR_ERR(msm_host->te_gpio);
1612 static int dsi_host_attach(struct mipi_dsi_host *host,
1613 struct mipi_dsi_device *dsi)
1615 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1618 if (dsi->lanes > msm_host->num_data_lanes)
1621 msm_host->channel = dsi->channel;
1622 msm_host->lanes = dsi->lanes;
1623 msm_host->format = dsi->format;
1624 msm_host->mode_flags = dsi->mode_flags;
1626 msm_host->dsc = dsi->dsc;
1628 /* Some gpios defined in panel DT need to be controlled by host */
1629 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1633 ret = dsi_dev_attach(msm_host->pdev);
1637 DBG("id=%d", msm_host->id);
1642 static int dsi_host_detach(struct mipi_dsi_host *host,
1643 struct mipi_dsi_device *dsi)
1645 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1647 dsi_dev_detach(msm_host->pdev);
1649 DBG("id=%d", msm_host->id);
1654 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1655 const struct mipi_dsi_msg *msg)
1657 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1660 if (!msg || !msm_host->power_on)
1663 mutex_lock(&msm_host->cmd_mutex);
1664 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1665 mutex_unlock(&msm_host->cmd_mutex);
1670 static const struct mipi_dsi_host_ops dsi_host_ops = {
1671 .attach = dsi_host_attach,
1672 .detach = dsi_host_detach,
1673 .transfer = dsi_host_transfer,
1677 * List of supported physical to logical lane mappings.
1678 * For example, the 2nd entry represents the following mapping:
1680 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1682 static const int supported_data_lane_swaps[][4] = {
1693 static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1694 struct device_node *ep)
1696 struct device *dev = &msm_host->pdev->dev;
1697 struct property *prop;
1699 int ret, i, len, num_lanes;
1701 prop = of_find_property(ep, "data-lanes", &len);
1704 "failed to find data lane mapping, using default\n");
1705 /* Set the number of date lanes to 4 by default. */
1706 msm_host->num_data_lanes = 4;
1710 num_lanes = drm_of_get_data_lanes_count(ep, 1, 4);
1711 if (num_lanes < 0) {
1712 DRM_DEV_ERROR(dev, "bad number of data lanes\n");
1716 msm_host->num_data_lanes = num_lanes;
1718 ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
1721 DRM_DEV_ERROR(dev, "failed to read lane data\n");
1726 * compare DT specified physical-logical lane mappings with the ones
1727 * supported by hardware
1729 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1730 const int *swap = supported_data_lane_swaps[i];
1734 * the data-lanes array we get from DT has a logical->physical
1735 * mapping. The "data lane swap" register field represents
1736 * supported configurations in a physical->logical mapping.
1737 * Translate the DT mapping to what we understand and find a
1738 * configuration that works.
1740 for (j = 0; j < num_lanes; j++) {
1741 if (lane_map[j] < 0 || lane_map[j] > 3)
1742 DRM_DEV_ERROR(dev, "bad physical lane entry %u\n",
1745 if (swap[lane_map[j]] != j)
1749 if (j == num_lanes) {
1750 msm_host->dlane_swap = i;
1758 static u32 dsi_dsc_rc_buf_thresh[DSC_NUM_BUF_RANGES - 1] = {
1759 0x0e, 0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62,
1760 0x69, 0x70, 0x77, 0x79, 0x7b, 0x7d, 0x7e
1763 /* only 8bpc, 8bpp added */
1764 static char min_qp[DSC_NUM_BUF_RANGES] = {
1765 0, 0, 1, 1, 3, 3, 3, 3, 3, 3, 5, 5, 5, 7, 13
1768 static char max_qp[DSC_NUM_BUF_RANGES] = {
1769 4, 4, 5, 6, 7, 7, 7, 8, 9, 10, 11, 12, 13, 13, 15
1772 static char bpg_offset[DSC_NUM_BUF_RANGES] = {
1773 2, 0, 0, -2, -4, -6, -8, -8, -8, -10, -10, -12, -12, -12, -12
1776 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc)
1779 u16 bpp = dsc->bits_per_pixel >> 4;
1781 if (dsc->bits_per_pixel & 0xf) {
1782 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support fractional bits_per_pixel\n");
1786 if (dsc->bits_per_component != 8) {
1787 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support bits_per_component != 8 yet\n");
1791 dsc->rc_model_size = 8192;
1792 dsc->first_line_bpg_offset = 12;
1793 dsc->rc_edge_factor = 6;
1794 dsc->rc_tgt_offset_high = 3;
1795 dsc->rc_tgt_offset_low = 3;
1796 dsc->simple_422 = 0;
1797 dsc->convert_rgb = 1;
1798 dsc->vbr_enable = 0;
1800 /* handle only bpp = bpc = 8 */
1801 for (i = 0; i < DSC_NUM_BUF_RANGES - 1 ; i++)
1802 dsc->rc_buf_thresh[i] = dsi_dsc_rc_buf_thresh[i];
1804 for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
1805 dsc->rc_range_params[i].range_min_qp = min_qp[i];
1806 dsc->rc_range_params[i].range_max_qp = max_qp[i];
1808 * Range BPG Offset contains two's-complement signed values that fill
1809 * 8 bits, yet the registers and DCS PPS field are only 6 bits wide.
1811 dsc->rc_range_params[i].range_bpg_offset = bpg_offset[i] & DSC_RANGE_BPG_OFFSET_MASK;
1814 dsc->initial_offset = 6144; /* Not bpp 12 */
1816 dsc->initial_offset = 2048; /* bpp = 12 */
1818 if (dsc->bits_per_component <= 10)
1819 dsc->mux_word_size = DSC_MUX_WORD_SIZE_8_10_BPC;
1821 dsc->mux_word_size = DSC_MUX_WORD_SIZE_12_BPC;
1823 dsc->initial_xmit_delay = 512;
1824 dsc->initial_scale_value = 32;
1825 dsc->first_line_bpg_offset = 12;
1826 dsc->line_buf_depth = dsc->bits_per_component + 1;
1829 dsc->flatness_min_qp = 3;
1830 dsc->flatness_max_qp = 12;
1831 dsc->rc_quant_incr_limit0 = 11;
1832 dsc->rc_quant_incr_limit1 = 11;
1834 return drm_dsc_compute_rc_parameters(dsc);
1837 static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1839 struct device *dev = &msm_host->pdev->dev;
1840 struct device_node *np = dev->of_node;
1841 struct device_node *endpoint;
1845 * Get the endpoint of the output port of the DSI host. In our case,
1846 * this is mapped to port number with reg = 1. Don't return an error if
1847 * the remote endpoint isn't defined. It's possible that there is
1848 * nothing connected to the dsi output.
1850 endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
1852 DRM_DEV_DEBUG(dev, "%s: no endpoint\n", __func__);
1856 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1858 DRM_DEV_ERROR(dev, "%s: invalid lane configuration %d\n",
1864 if (of_property_read_bool(np, "syscon-sfpb")) {
1865 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1867 if (IS_ERR(msm_host->sfpb)) {
1868 DRM_DEV_ERROR(dev, "%s: failed to get sfpb regmap\n",
1870 ret = PTR_ERR(msm_host->sfpb);
1875 of_node_put(endpoint);
1880 static int dsi_host_get_id(struct msm_dsi_host *msm_host)
1882 struct platform_device *pdev = msm_host->pdev;
1883 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
1884 struct resource *res;
1887 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
1891 for (i = 0; i < cfg->num_dsi; i++) {
1892 if (cfg->io_start[i] == res->start)
1899 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1901 struct msm_dsi_host *msm_host = NULL;
1902 struct platform_device *pdev = msm_dsi->pdev;
1903 const struct msm_dsi_config *cfg;
1906 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1912 msm_host->pdev = pdev;
1913 msm_dsi->host = &msm_host->base;
1915 ret = dsi_host_parse_dt(msm_host);
1917 pr_err("%s: failed to parse dt\n", __func__);
1921 msm_host->ctrl_base = msm_ioremap_size(pdev, "dsi_ctrl", &msm_host->ctrl_size);
1922 if (IS_ERR(msm_host->ctrl_base)) {
1923 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1924 ret = PTR_ERR(msm_host->ctrl_base);
1928 pm_runtime_enable(&pdev->dev);
1930 msm_host->cfg_hnd = dsi_get_config(msm_host);
1931 if (!msm_host->cfg_hnd) {
1933 pr_err("%s: get config failed\n", __func__);
1936 cfg = msm_host->cfg_hnd->cfg;
1938 msm_host->id = dsi_host_get_id(msm_host);
1939 if (msm_host->id < 0) {
1941 pr_err("%s: unable to identify DSI host index\n", __func__);
1945 /* fixup base address by io offset */
1946 msm_host->ctrl_base += cfg->io_offset;
1948 ret = devm_regulator_bulk_get_const(&pdev->dev, cfg->num_regulators,
1949 cfg->regulator_data,
1950 &msm_host->supplies);
1954 ret = dsi_clk_init(msm_host);
1956 pr_err("%s: unable to initialize dsi clks\n", __func__);
1960 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1961 if (!msm_host->rx_buf) {
1963 pr_err("%s: alloc rx temp buf failed\n", __func__);
1967 ret = devm_pm_opp_set_clkname(&pdev->dev, "byte");
1970 /* OPP table is optional */
1971 ret = devm_pm_opp_of_add_table(&pdev->dev);
1972 if (ret && ret != -ENODEV) {
1973 dev_err(&pdev->dev, "invalid OPP table in device tree\n");
1977 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1978 if (!msm_host->irq) {
1979 dev_err(&pdev->dev, "failed to get irq\n");
1983 /* do not autoenable, will be enabled later */
1984 ret = devm_request_irq(&pdev->dev, msm_host->irq, dsi_host_irq,
1985 IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
1986 "dsi_isr", msm_host);
1988 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1989 msm_host->irq, ret);
1993 init_completion(&msm_host->dma_comp);
1994 init_completion(&msm_host->video_comp);
1995 mutex_init(&msm_host->dev_mutex);
1996 mutex_init(&msm_host->cmd_mutex);
1997 spin_lock_init(&msm_host->intr_lock);
1999 /* setup workqueue */
2000 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
2001 if (!msm_host->workqueue)
2004 INIT_WORK(&msm_host->err_work, dsi_err_worker);
2006 msm_dsi->id = msm_host->id;
2008 DBG("Dsi Host %d initialized", msm_host->id);
2015 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
2017 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2020 if (msm_host->workqueue) {
2021 destroy_workqueue(msm_host->workqueue);
2022 msm_host->workqueue = NULL;
2025 mutex_destroy(&msm_host->cmd_mutex);
2026 mutex_destroy(&msm_host->dev_mutex);
2028 pm_runtime_disable(&msm_host->pdev->dev);
2031 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
2032 struct drm_device *dev)
2034 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2035 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2038 msm_host->dev = dev;
2040 ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
2042 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
2049 int msm_dsi_host_register(struct mipi_dsi_host *host)
2051 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2054 /* Register mipi dsi host */
2055 if (!msm_host->registered) {
2056 host->dev = &msm_host->pdev->dev;
2057 host->ops = &dsi_host_ops;
2058 ret = mipi_dsi_host_register(host);
2062 msm_host->registered = true;
2068 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
2070 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2072 if (msm_host->registered) {
2073 mipi_dsi_host_unregister(host);
2076 msm_host->registered = false;
2080 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
2081 const struct mipi_dsi_msg *msg)
2083 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2084 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2086 /* TODO: make sure dsi_cmd_mdp is idle.
2087 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
2088 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
2089 * How to handle the old versions? Wait for mdp cmd done?
2093 * mdss interrupt is generated in mdp core clock domain
2094 * mdp clock need to be enabled to receive dsi interrupt
2096 pm_runtime_get_sync(&msm_host->pdev->dev);
2097 cfg_hnd->ops->link_clk_set_rate(msm_host);
2098 cfg_hnd->ops->link_clk_enable(msm_host);
2100 /* TODO: vote for bus bandwidth */
2102 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2103 dsi_set_tx_power_mode(0, msm_host);
2105 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
2106 dsi_write(msm_host, REG_DSI_CTRL,
2107 msm_host->dma_cmd_ctrl_restore |
2108 DSI_CTRL_CMD_MODE_EN |
2110 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
2115 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
2116 const struct mipi_dsi_msg *msg)
2118 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2119 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2121 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
2122 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
2124 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2125 dsi_set_tx_power_mode(1, msm_host);
2127 /* TODO: unvote for bus bandwidth */
2129 cfg_hnd->ops->link_clk_disable(msm_host);
2130 pm_runtime_put(&msm_host->pdev->dev);
2133 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
2134 const struct mipi_dsi_msg *msg)
2136 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2138 return dsi_cmds2buf_tx(msm_host, msg);
2141 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
2142 const struct mipi_dsi_msg *msg)
2144 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2145 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2146 int data_byte, rx_byte, dlen, end;
2147 int short_response, diff, pkt_size, ret = 0;
2149 int rlen = msg->rx_len;
2158 data_byte = 10; /* first read */
2159 if (rlen < data_byte)
2162 pkt_size = data_byte;
2163 rx_byte = data_byte + 6; /* 4 header + 2 crc */
2166 buf = msm_host->rx_buf;
2169 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
2170 struct mipi_dsi_msg max_pkt_size_msg = {
2171 .channel = msg->channel,
2172 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
2177 DBG("rlen=%d pkt_size=%d rx_byte=%d",
2178 rlen, pkt_size, rx_byte);
2180 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
2182 pr_err("%s: Set max pkt size failed, %d\n",
2187 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
2188 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
2189 /* Clear the RDBK_DATA registers */
2190 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
2191 DSI_RDBK_DATA_CTRL_CLR);
2192 wmb(); /* make sure the RDBK registers are cleared */
2193 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
2194 wmb(); /* release cleared status before transfer */
2197 ret = dsi_cmds2buf_tx(msm_host, msg);
2199 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
2201 } else if (ret < msg->tx_len) {
2202 pr_err("%s: Read cmd Tx failed, too short: %d\n", __func__, ret);
2207 * once cmd_dma_done interrupt received,
2208 * return data from client is ready and stored
2209 * at RDBK_DATA register already
2210 * since rx fifo is 16 bytes, dcs header is kept at first loop,
2211 * after that dcs header lost during shift into registers
2213 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
2221 if (rlen <= data_byte) {
2222 diff = data_byte - rlen;
2230 dlen -= 2; /* 2 crc */
2232 buf += dlen; /* next start position */
2233 data_byte = 14; /* NOT first read */
2234 if (rlen < data_byte)
2237 pkt_size += data_byte;
2238 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
2243 * For single Long read, if the requested rlen < 10,
2244 * we need to shift the start position of rx
2245 * data buffer to skip the bytes which are not
2248 if (pkt_size < 10 && !short_response)
2249 buf = msm_host->rx_buf + (10 - rlen);
2251 buf = msm_host->rx_buf;
2255 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2256 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2259 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2260 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2261 ret = dsi_short_read1_resp(buf, msg);
2263 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2264 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2265 ret = dsi_short_read2_resp(buf, msg);
2267 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2268 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2269 ret = dsi_long_read_resp(buf, msg);
2272 pr_warn("%s:Invalid response cmd\n", __func__);
2279 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2282 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2284 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2285 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2286 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2288 /* Make sure trigger happens */
2292 void msm_dsi_host_set_phy_mode(struct mipi_dsi_host *host,
2293 struct msm_dsi_phy *src_phy)
2295 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2297 msm_host->cphy_mode = src_phy->cphy_mode;
2300 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
2302 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2305 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
2306 /* Make sure fully reset */
2309 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
2313 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
2314 struct msm_dsi_phy_clk_request *clk_req,
2317 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2318 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2321 ret = cfg_hnd->ops->calc_clk_rate(msm_host, is_bonded_dsi);
2323 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2327 /* CPHY transmits 16 bits over 7 clock cycles
2328 * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
2329 * so multiply by 7 to get the "bitclk rate"
2331 if (msm_host->cphy_mode)
2332 clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
2334 clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
2335 clk_req->escclk_rate = msm_host->esc_clk_rate;
2338 void msm_dsi_host_enable_irq(struct mipi_dsi_host *host)
2340 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2342 enable_irq(msm_host->irq);
2345 void msm_dsi_host_disable_irq(struct mipi_dsi_host *host)
2347 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2349 disable_irq(msm_host->irq);
2352 int msm_dsi_host_enable(struct mipi_dsi_host *host)
2354 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2356 dsi_op_mode_config(msm_host,
2357 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2359 /* TODO: clock should be turned off for command mode,
2360 * and only turned on before MDP START.
2361 * This part of code should be enabled once mdp driver support it.
2363 /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
2364 * dsi_link_clk_disable(msm_host);
2365 * pm_runtime_put(&msm_host->pdev->dev);
2368 msm_host->enabled = true;
2372 int msm_dsi_host_disable(struct mipi_dsi_host *host)
2374 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2376 msm_host->enabled = false;
2377 dsi_op_mode_config(msm_host,
2378 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2380 /* Since we have disabled INTF, the video engine won't stop so that
2381 * the cmd engine will be blocked.
2382 * Reset to disable video engine so that we can send off cmd.
2384 dsi_sw_reset(msm_host);
2389 static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2391 enum sfpb_ahb_arb_master_port_en en;
2393 if (!msm_host->sfpb)
2396 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2398 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2399 SFPB_GPREG_MASTER_PORT_EN__MASK,
2400 SFPB_GPREG_MASTER_PORT_EN(en));
2403 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
2404 struct msm_dsi_phy_shared_timings *phy_shared_timings,
2405 bool is_bonded_dsi, struct msm_dsi_phy *phy)
2407 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2408 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2411 mutex_lock(&msm_host->dev_mutex);
2412 if (msm_host->power_on) {
2413 DBG("dsi host already on");
2417 msm_dsi_sfpb_config(msm_host, true);
2419 ret = regulator_bulk_enable(msm_host->cfg_hnd->cfg->num_regulators,
2420 msm_host->supplies);
2422 pr_err("%s:Failed to enable vregs.ret=%d\n",
2427 pm_runtime_get_sync(&msm_host->pdev->dev);
2428 ret = cfg_hnd->ops->link_clk_set_rate(msm_host);
2430 ret = cfg_hnd->ops->link_clk_enable(msm_host);
2432 pr_err("%s: failed to enable link clocks. ret=%d\n",
2434 goto fail_disable_reg;
2437 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2439 pr_err("%s: failed to set pinctrl default state, %d\n",
2441 goto fail_disable_clk;
2444 dsi_timing_setup(msm_host, is_bonded_dsi);
2445 dsi_sw_reset(msm_host);
2446 dsi_ctrl_config(msm_host, true, phy_shared_timings, phy);
2448 if (msm_host->disp_en_gpio)
2449 gpiod_set_value(msm_host->disp_en_gpio, 1);
2451 msm_host->power_on = true;
2452 mutex_unlock(&msm_host->dev_mutex);
2457 cfg_hnd->ops->link_clk_disable(msm_host);
2458 pm_runtime_put(&msm_host->pdev->dev);
2460 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2461 msm_host->supplies);
2463 mutex_unlock(&msm_host->dev_mutex);
2467 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2469 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2470 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2472 mutex_lock(&msm_host->dev_mutex);
2473 if (!msm_host->power_on) {
2474 DBG("dsi host already off");
2478 dsi_ctrl_config(msm_host, false, NULL, NULL);
2480 if (msm_host->disp_en_gpio)
2481 gpiod_set_value(msm_host->disp_en_gpio, 0);
2483 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2485 cfg_hnd->ops->link_clk_disable(msm_host);
2486 pm_runtime_put(&msm_host->pdev->dev);
2488 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2489 msm_host->supplies);
2491 msm_dsi_sfpb_config(msm_host, false);
2495 msm_host->power_on = false;
2498 mutex_unlock(&msm_host->dev_mutex);
2502 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2503 const struct drm_display_mode *mode)
2505 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2507 if (msm_host->mode) {
2508 drm_mode_destroy(msm_host->dev, msm_host->mode);
2509 msm_host->mode = NULL;
2512 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2513 if (!msm_host->mode) {
2514 pr_err("%s: cannot duplicate mode\n", __func__);
2521 enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
2522 const struct drm_display_mode *mode)
2524 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2525 struct drm_dsc_config *dsc = msm_host->dsc;
2526 int pic_width = mode->hdisplay;
2527 int pic_height = mode->vdisplay;
2532 if (pic_width % dsc->slice_width) {
2533 pr_err("DSI: pic_width %d has to be multiple of slice %d\n",
2534 pic_width, dsc->slice_width);
2535 return MODE_H_ILLEGAL;
2538 if (pic_height % dsc->slice_height) {
2539 pr_err("DSI: pic_height %d has to be multiple of slice %d\n",
2540 pic_height, dsc->slice_height);
2541 return MODE_V_ILLEGAL;
2547 unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
2549 return to_msm_dsi_host(host)->mode_flags;
2552 void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
2554 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2556 pm_runtime_get_sync(&msm_host->pdev->dev);
2558 msm_disp_snapshot_add_block(disp_state, msm_host->ctrl_size,
2559 msm_host->ctrl_base, "dsi%d_ctrl", msm_host->id);
2561 pm_runtime_put_sync(&msm_host->pdev->dev);
2564 static void msm_dsi_host_video_test_pattern_setup(struct msm_dsi_host *msm_host)
2568 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2570 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_VIDEO_INIT_VAL, 0xff);
2571 /* draw checkered rectangle pattern */
2572 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL,
2573 DSI_TPG_MAIN_CONTROL_CHECKERED_RECTANGLE_PATTERN);
2574 /* use 24-bit RGB test pttern */
2575 dsi_write(msm_host, REG_DSI_TPG_VIDEO_CONFIG,
2576 DSI_TPG_VIDEO_CONFIG_BPP(VIDEO_CONFIG_24BPP) |
2577 DSI_TPG_VIDEO_CONFIG_RGB);
2579 reg |= DSI_TEST_PATTERN_GEN_CTRL_VIDEO_PATTERN_SEL(VID_MDSS_GENERAL_PATTERN);
2580 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2582 DBG("Video test pattern setup done\n");
2585 static void msm_dsi_host_cmd_test_pattern_setup(struct msm_dsi_host *msm_host)
2589 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2591 /* initial value for test pattern */
2592 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_MDP_INIT_VAL0, 0xff);
2594 reg |= DSI_TEST_PATTERN_GEN_CTRL_CMD_MDP_STREAM0_PATTERN_SEL(CMD_MDP_MDSS_GENERAL_PATTERN);
2596 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2597 /* draw checkered rectangle pattern */
2598 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL2,
2599 DSI_TPG_MAIN_CONTROL2_CMD_MDP0_CHECKERED_RECTANGLE_PATTERN);
2601 DBG("Cmd test pattern setup done\n");
2604 void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host)
2606 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2607 bool is_video_mode = !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO);
2611 msm_dsi_host_video_test_pattern_setup(msm_host);
2613 msm_dsi_host_cmd_test_pattern_setup(msm_host);
2615 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2616 /* enable the test pattern generator */
2617 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, (reg | DSI_TEST_PATTERN_GEN_CTRL_EN));
2619 /* for command mode need to trigger one frame from tpg */
2621 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER,
2622 DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER_SW_TRIGGER);
2625 struct drm_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host)
2627 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2629 return msm_host->dsc;