2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/gpio/consumer.h>
19 #include <linux/interrupt.h>
20 #include <linux/of_device.h>
21 #include <linux/of_gpio.h>
22 #include <linux/of_irq.h>
23 #include <linux/pinctrl/consumer.h>
24 #include <linux/of_graph.h>
25 #include <linux/regulator/consumer.h>
26 #include <linux/spinlock.h>
27 #include <linux/mfd/syscon.h>
28 #include <linux/regmap.h>
29 #include <video/mipi_display.h>
37 static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
45 * From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
46 * makes all other registers 4-byte shifted down.
48 * In order to identify between DSI6G(v3) and beyond, and DSIv2 and
49 * older, we read the DSI_VERSION register without any shift(offset
50 * 0x1f0). In the case of DSIv2, this hast to be a non-zero value. In
51 * the case of DSI6G, this has to be zero (the offset points to a
52 * scratch register which we never touch)
55 ver = msm_readl(base + REG_DSI_VERSION);
57 /* older dsi host, there is no register shift */
58 ver = FIELD(ver, DSI_VERSION_MAJOR);
59 if (ver <= MSM_DSI_VER_MAJOR_V2) {
69 * newer host, offset 0 has 6G_HW_VERSION, the rest of the
70 * registers are shifted down, read DSI_VERSION again with
73 ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
74 ver = FIELD(ver, DSI_VERSION_MAJOR);
75 if (ver == MSM_DSI_VER_MAJOR_6G) {
78 *minor = msm_readl(base + REG_DSI_6G_HW_VERSION);
86 #define DSI_ERR_STATE_ACK 0x0000
87 #define DSI_ERR_STATE_TIMEOUT 0x0001
88 #define DSI_ERR_STATE_DLN0_PHY 0x0002
89 #define DSI_ERR_STATE_FIFO 0x0004
90 #define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
91 #define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
92 #define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
94 #define DSI_CLK_CTRL_ENABLE_CLKS \
95 (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
96 DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
97 DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
98 DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
100 struct msm_dsi_host {
101 struct mipi_dsi_host base;
103 struct platform_device *pdev;
104 struct drm_device *dev;
108 void __iomem *ctrl_base;
109 struct regulator_bulk_data supplies[DSI_DEV_REGULATOR_MAX];
111 struct clk *bus_clks[DSI_BUS_CLK_MAX];
113 struct clk *byte_clk;
115 struct clk *pixel_clk;
116 struct clk *byte_clk_src;
117 struct clk *pixel_clk_src;
118 struct clk *byte_intf_clk;
123 /* DSI v2 specific clocks */
125 struct clk *esc_clk_src;
126 struct clk *dsi_clk_src;
130 struct gpio_desc *disp_en_gpio;
131 struct gpio_desc *te_gpio;
133 const struct msm_dsi_cfg_handler *cfg_hnd;
135 struct completion dma_comp;
136 struct completion video_comp;
137 struct mutex dev_mutex;
138 struct mutex cmd_mutex;
139 spinlock_t intr_lock; /* Protect interrupt ctrl register */
142 struct work_struct err_work;
143 struct work_struct hpd_work;
144 struct workqueue_struct *workqueue;
146 /* DSI 6G TX buffer*/
147 struct drm_gem_object *tx_gem_obj;
149 /* DSI v2 TX buffer */
151 dma_addr_t tx_buf_paddr;
159 struct drm_display_mode *mode;
161 /* connected device info */
162 struct device_node *device_node;
163 unsigned int channel;
165 enum mipi_dsi_pixel_format format;
166 unsigned long mode_flags;
168 /* lane data parsed via DT */
172 u32 dma_cmd_ctrl_restore;
179 static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
182 case MIPI_DSI_FMT_RGB565: return 16;
183 case MIPI_DSI_FMT_RGB666_PACKED: return 18;
184 case MIPI_DSI_FMT_RGB666:
185 case MIPI_DSI_FMT_RGB888:
190 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
192 return msm_readl(msm_host->ctrl_base + reg);
194 static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
196 msm_writel(data, msm_host->ctrl_base + reg);
199 static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
200 static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
202 static const struct msm_dsi_cfg_handler *dsi_get_config(
203 struct msm_dsi_host *msm_host)
205 const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
206 struct device *dev = &msm_host->pdev->dev;
207 struct regulator *gdsc_reg;
210 u32 major = 0, minor = 0;
212 gdsc_reg = regulator_get(dev, "gdsc");
213 if (IS_ERR(gdsc_reg)) {
214 pr_err("%s: cannot get gdsc\n", __func__);
218 ahb_clk = msm_clk_get(msm_host->pdev, "iface");
219 if (IS_ERR(ahb_clk)) {
220 pr_err("%s: cannot get interface clock\n", __func__);
224 pm_runtime_get_sync(dev);
226 ret = regulator_enable(gdsc_reg);
228 pr_err("%s: unable to enable gdsc\n", __func__);
232 ret = clk_prepare_enable(ahb_clk);
234 pr_err("%s: unable to enable ahb_clk\n", __func__);
238 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
240 pr_err("%s: Invalid version\n", __func__);
244 cfg_hnd = msm_dsi_cfg_get(major, minor);
246 DBG("%s: Version %x:%x\n", __func__, major, minor);
249 clk_disable_unprepare(ahb_clk);
251 regulator_disable(gdsc_reg);
252 pm_runtime_put_sync(dev);
254 regulator_put(gdsc_reg);
259 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
261 return container_of(host, struct msm_dsi_host, base);
264 static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
266 struct regulator_bulk_data *s = msm_host->supplies;
267 const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
268 int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
272 for (i = num - 1; i >= 0; i--)
273 if (regs[i].disable_load >= 0)
274 regulator_set_load(s[i].consumer,
275 regs[i].disable_load);
277 regulator_bulk_disable(num, s);
280 static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
282 struct regulator_bulk_data *s = msm_host->supplies;
283 const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
284 int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
288 for (i = 0; i < num; i++) {
289 if (regs[i].enable_load >= 0) {
290 ret = regulator_set_load(s[i].consumer,
291 regs[i].enable_load);
293 pr_err("regulator %d set op mode failed, %d\n",
300 ret = regulator_bulk_enable(num, s);
302 pr_err("regulator enable failed, %d\n", ret);
309 for (i--; i >= 0; i--)
310 regulator_set_load(s[i].consumer, regs[i].disable_load);
314 static int dsi_regulator_init(struct msm_dsi_host *msm_host)
316 struct regulator_bulk_data *s = msm_host->supplies;
317 const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
318 int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
321 for (i = 0; i < num; i++)
322 s[i].supply = regs[i].name;
324 ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s);
326 pr_err("%s: failed to init regulator, ret=%d\n",
334 static int dsi_clk_init(struct msm_dsi_host *msm_host)
336 struct platform_device *pdev = msm_host->pdev;
337 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
338 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
342 for (i = 0; i < cfg->num_bus_clks; i++) {
343 msm_host->bus_clks[i] = msm_clk_get(pdev,
344 cfg->bus_clk_names[i]);
345 if (IS_ERR(msm_host->bus_clks[i])) {
346 ret = PTR_ERR(msm_host->bus_clks[i]);
347 pr_err("%s: Unable to get %s clock, ret = %d\n",
348 __func__, cfg->bus_clk_names[i], ret);
353 /* get link and source clocks */
354 msm_host->byte_clk = msm_clk_get(pdev, "byte");
355 if (IS_ERR(msm_host->byte_clk)) {
356 ret = PTR_ERR(msm_host->byte_clk);
357 pr_err("%s: can't find dsi_byte clock. ret=%d\n",
359 msm_host->byte_clk = NULL;
363 msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
364 if (IS_ERR(msm_host->pixel_clk)) {
365 ret = PTR_ERR(msm_host->pixel_clk);
366 pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
368 msm_host->pixel_clk = NULL;
372 msm_host->esc_clk = msm_clk_get(pdev, "core");
373 if (IS_ERR(msm_host->esc_clk)) {
374 ret = PTR_ERR(msm_host->esc_clk);
375 pr_err("%s: can't find dsi_esc clock. ret=%d\n",
377 msm_host->esc_clk = NULL;
381 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G &&
382 cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V2_2_1) {
383 msm_host->byte_intf_clk = msm_clk_get(pdev, "byte_intf");
384 if (IS_ERR(msm_host->byte_intf_clk)) {
385 ret = PTR_ERR(msm_host->byte_intf_clk);
386 pr_err("%s: can't find byte_intf clock. ret=%d\n",
391 msm_host->byte_intf_clk = NULL;
394 msm_host->byte_clk_src = clk_get_parent(msm_host->byte_clk);
395 if (!msm_host->byte_clk_src) {
397 pr_err("%s: can't find byte_clk clock. ret=%d\n", __func__, ret);
401 msm_host->pixel_clk_src = clk_get_parent(msm_host->pixel_clk);
402 if (!msm_host->pixel_clk_src) {
404 pr_err("%s: can't find pixel_clk clock. ret=%d\n", __func__, ret);
408 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
409 msm_host->src_clk = msm_clk_get(pdev, "src");
410 if (IS_ERR(msm_host->src_clk)) {
411 ret = PTR_ERR(msm_host->src_clk);
412 pr_err("%s: can't find src clock. ret=%d\n",
414 msm_host->src_clk = NULL;
418 msm_host->esc_clk_src = clk_get_parent(msm_host->esc_clk);
419 if (!msm_host->esc_clk_src) {
421 pr_err("%s: can't get esc clock parent. ret=%d\n",
426 msm_host->dsi_clk_src = clk_get_parent(msm_host->src_clk);
427 if (!msm_host->dsi_clk_src) {
429 pr_err("%s: can't get src clock parent. ret=%d\n",
437 static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
439 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
442 DBG("id=%d", msm_host->id);
444 for (i = 0; i < cfg->num_bus_clks; i++) {
445 ret = clk_prepare_enable(msm_host->bus_clks[i]);
447 pr_err("%s: failed to enable bus clock %d ret %d\n",
456 clk_disable_unprepare(msm_host->bus_clks[i]);
461 static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
463 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
468 for (i = cfg->num_bus_clks - 1; i >= 0; i--)
469 clk_disable_unprepare(msm_host->bus_clks[i]);
472 int msm_dsi_runtime_suspend(struct device *dev)
474 struct platform_device *pdev = to_platform_device(dev);
475 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
476 struct mipi_dsi_host *host = msm_dsi->host;
477 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
479 if (!msm_host->cfg_hnd)
482 dsi_bus_clk_disable(msm_host);
487 int msm_dsi_runtime_resume(struct device *dev)
489 struct platform_device *pdev = to_platform_device(dev);
490 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
491 struct mipi_dsi_host *host = msm_dsi->host;
492 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
494 if (!msm_host->cfg_hnd)
497 return dsi_bus_clk_enable(msm_host);
500 static int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
504 DBG("Set clk rates: pclk=%d, byteclk=%d",
505 msm_host->mode->clock, msm_host->byte_clk_rate);
507 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
509 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
513 ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
515 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
519 if (msm_host->byte_intf_clk) {
520 ret = clk_set_rate(msm_host->byte_intf_clk,
521 msm_host->byte_clk_rate / 2);
523 pr_err("%s: Failed to set rate byte intf clk, %d\n",
529 ret = clk_prepare_enable(msm_host->esc_clk);
531 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
535 ret = clk_prepare_enable(msm_host->byte_clk);
537 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
541 ret = clk_prepare_enable(msm_host->pixel_clk);
543 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
547 if (msm_host->byte_intf_clk) {
548 ret = clk_prepare_enable(msm_host->byte_intf_clk);
550 pr_err("%s: Failed to enable byte intf clk\n",
552 goto byte_intf_clk_err;
559 clk_disable_unprepare(msm_host->pixel_clk);
561 clk_disable_unprepare(msm_host->byte_clk);
563 clk_disable_unprepare(msm_host->esc_clk);
568 static int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
572 DBG("Set clk rates: pclk=%d, byteclk=%d, esc_clk=%d, dsi_src_clk=%d",
573 msm_host->mode->clock, msm_host->byte_clk_rate,
574 msm_host->esc_clk_rate, msm_host->src_clk_rate);
576 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
578 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
582 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
584 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
588 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
590 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
594 ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
596 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
600 ret = clk_prepare_enable(msm_host->byte_clk);
602 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
606 ret = clk_prepare_enable(msm_host->esc_clk);
608 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
612 ret = clk_prepare_enable(msm_host->src_clk);
614 pr_err("%s: Failed to enable dsi src clk\n", __func__);
618 ret = clk_prepare_enable(msm_host->pixel_clk);
620 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
627 clk_disable_unprepare(msm_host->src_clk);
629 clk_disable_unprepare(msm_host->esc_clk);
631 clk_disable_unprepare(msm_host->byte_clk);
636 static int dsi_link_clk_enable(struct msm_dsi_host *msm_host)
638 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
640 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G)
641 return dsi_link_clk_enable_6g(msm_host);
643 return dsi_link_clk_enable_v2(msm_host);
646 static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
648 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
650 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
651 clk_disable_unprepare(msm_host->esc_clk);
652 clk_disable_unprepare(msm_host->pixel_clk);
653 if (msm_host->byte_intf_clk)
654 clk_disable_unprepare(msm_host->byte_intf_clk);
655 clk_disable_unprepare(msm_host->byte_clk);
657 clk_disable_unprepare(msm_host->pixel_clk);
658 clk_disable_unprepare(msm_host->src_clk);
659 clk_disable_unprepare(msm_host->esc_clk);
660 clk_disable_unprepare(msm_host->byte_clk);
664 static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
666 struct drm_display_mode *mode = msm_host->mode;
667 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
668 u8 lanes = msm_host->lanes;
669 u32 bpp = dsi_get_bpp(msm_host->format);
673 pr_err("%s: mode not set\n", __func__);
677 pclk_rate = mode->clock * 1000;
679 msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
681 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
682 msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
685 DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
687 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
689 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
690 unsigned int esc_mhz, esc_div;
691 unsigned long byte_mhz;
693 msm_host->src_clk_rate = (pclk_rate * bpp) / 8;
696 * esc clock is byte clock followed by a 4 bit divider,
697 * we need to find an escape clock frequency within the
698 * mipi DSI spec range within the maximum divider limit
699 * We iterate here between an escape clock frequencey
700 * between 20 Mhz to 5 Mhz and pick up the first one
701 * that can be supported by our divider
704 byte_mhz = msm_host->byte_clk_rate / 1000000;
706 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
707 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
710 * TODO: Ideally, we shouldn't know what sort of divider
711 * is available in mmss_cc, we're just assuming that
712 * it'll always be a 4 bit divider. Need to come up with
715 if (esc_div >= 1 && esc_div <= 16)
722 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
724 DBG("esc=%d, src=%d", msm_host->esc_clk_rate,
725 msm_host->src_clk_rate);
731 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
736 spin_lock_irqsave(&msm_host->intr_lock, flags);
737 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
744 DBG("intr=%x enable=%d", intr, enable);
746 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
747 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
750 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
752 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
754 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
755 return NON_BURST_SYNCH_PULSE;
757 return NON_BURST_SYNCH_EVENT;
760 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
761 const enum mipi_dsi_pixel_format mipi_fmt)
764 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
765 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
766 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
767 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
768 default: return VID_DST_FORMAT_RGB888;
772 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
773 const enum mipi_dsi_pixel_format mipi_fmt)
776 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
777 case MIPI_DSI_FMT_RGB666_PACKED:
778 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666;
779 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
780 default: return CMD_DST_FORMAT_RGB888;
784 static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
785 struct msm_dsi_phy_shared_timings *phy_shared_timings)
787 u32 flags = msm_host->mode_flags;
788 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
789 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
793 dsi_write(msm_host, REG_DSI_CTRL, 0);
797 if (flags & MIPI_DSI_MODE_VIDEO) {
798 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
799 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
800 if (flags & MIPI_DSI_MODE_VIDEO_HFP)
801 data |= DSI_VID_CFG0_HFP_POWER_STOP;
802 if (flags & MIPI_DSI_MODE_VIDEO_HBP)
803 data |= DSI_VID_CFG0_HBP_POWER_STOP;
804 if (flags & MIPI_DSI_MODE_VIDEO_HSA)
805 data |= DSI_VID_CFG0_HSA_POWER_STOP;
806 /* Always set low power stop mode for BLLP
807 * to let command engine send packets
809 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
810 DSI_VID_CFG0_BLLP_POWER_STOP;
811 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
812 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
813 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
814 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
816 /* Do not swap RGB colors */
817 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
818 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
820 /* Do not swap RGB colors */
821 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
822 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
823 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
825 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
826 DSI_CMD_CFG1_WR_MEM_CONTINUE(
827 MIPI_DCS_WRITE_MEMORY_CONTINUE);
828 /* Always insert DCS command */
829 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
830 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
833 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
834 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
835 DSI_CMD_DMA_CTRL_LOW_POWER);
838 /* Always assume dedicated TE pin */
839 data |= DSI_TRIG_CTRL_TE;
840 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
841 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
842 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
843 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
844 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
845 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
846 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
848 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(phy_shared_timings->clk_post) |
849 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(phy_shared_timings->clk_pre);
850 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
852 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
853 (cfg_hnd->minor > MSM_DSI_6G_VER_MINOR_V1_0) &&
854 phy_shared_timings->clk_pre_inc_by_2)
855 dsi_write(msm_host, REG_DSI_T_CLK_PRE_EXTEND,
856 DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK);
859 if (!(flags & MIPI_DSI_MODE_EOT_PACKET))
860 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
861 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
863 /* allow only ack-err-status to generate interrupt */
864 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
866 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
868 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
870 data = DSI_CTRL_CLK_EN;
872 DBG("lane number=%d", msm_host->lanes);
873 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
875 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
876 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
878 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
879 dsi_write(msm_host, REG_DSI_LANE_CTRL,
880 DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
882 data |= DSI_CTRL_ENABLE;
884 dsi_write(msm_host, REG_DSI_CTRL, data);
887 static void dsi_timing_setup(struct msm_dsi_host *msm_host)
889 struct drm_display_mode *mode = msm_host->mode;
890 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
891 u32 h_total = mode->htotal;
892 u32 v_total = mode->vtotal;
893 u32 hs_end = mode->hsync_end - mode->hsync_start;
894 u32 vs_end = mode->vsync_end - mode->vsync_start;
895 u32 ha_start = h_total - mode->hsync_start;
896 u32 ha_end = ha_start + mode->hdisplay;
897 u32 va_start = v_total - mode->vsync_start;
898 u32 va_end = va_start + mode->vdisplay;
903 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
904 dsi_write(msm_host, REG_DSI_ACTIVE_H,
905 DSI_ACTIVE_H_START(ha_start) |
906 DSI_ACTIVE_H_END(ha_end));
907 dsi_write(msm_host, REG_DSI_ACTIVE_V,
908 DSI_ACTIVE_V_START(va_start) |
909 DSI_ACTIVE_V_END(va_end));
910 dsi_write(msm_host, REG_DSI_TOTAL,
911 DSI_TOTAL_H_TOTAL(h_total - 1) |
912 DSI_TOTAL_V_TOTAL(v_total - 1));
914 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
915 DSI_ACTIVE_HSYNC_START(hs_start) |
916 DSI_ACTIVE_HSYNC_END(hs_end));
917 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
918 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
919 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
920 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
921 } else { /* command mode */
922 /* image data and 1 byte write_memory_start cmd */
923 wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
925 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL,
926 DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) |
927 DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL(
929 DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE(
930 MIPI_DSI_DCS_LONG_WRITE));
932 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL,
933 DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) |
934 DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay));
938 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
940 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
941 wmb(); /* clocks need to be enabled before reset */
943 dsi_write(msm_host, REG_DSI_RESET, 1);
944 wmb(); /* make sure reset happen */
945 dsi_write(msm_host, REG_DSI_RESET, 0);
948 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
949 bool video_mode, bool enable)
953 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
956 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
957 DSI_CTRL_CMD_MODE_EN);
958 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
959 DSI_IRQ_MASK_VIDEO_DONE, 0);
962 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
963 } else { /* command mode */
964 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
965 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
967 dsi_ctrl |= DSI_CTRL_ENABLE;
970 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
973 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
977 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
980 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
982 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
984 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
987 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
989 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
991 reinit_completion(&msm_host->video_comp);
993 wait_for_completion_timeout(&msm_host->video_comp,
994 msecs_to_jiffies(70));
996 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
999 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
1001 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
1004 if (msm_host->power_on) {
1005 dsi_wait4video_done(msm_host);
1006 /* delay 4 ms to skip BLLP */
1007 usleep_range(2000, 4000);
1012 static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
1014 struct drm_device *dev = msm_host->dev;
1015 struct msm_drm_private *priv = dev->dev_private;
1016 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1020 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
1021 msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED);
1022 if (IS_ERR(msm_host->tx_gem_obj)) {
1023 ret = PTR_ERR(msm_host->tx_gem_obj);
1024 pr_err("%s: failed to allocate gem, %d\n",
1026 msm_host->tx_gem_obj = NULL;
1030 ret = msm_gem_get_iova(msm_host->tx_gem_obj,
1031 priv->kms->aspace, &iova);
1032 mutex_unlock(&dev->struct_mutex);
1034 pr_err("%s: failed to get iova, %d\n", __func__, ret);
1039 pr_err("%s: buf NOT 8 bytes aligned\n", __func__);
1043 msm_host->tx_size = msm_host->tx_gem_obj->size;
1045 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1046 &msm_host->tx_buf_paddr, GFP_KERNEL);
1047 if (!msm_host->tx_buf) {
1049 pr_err("%s: failed to allocate tx buf, %d\n",
1054 msm_host->tx_size = size;
1060 static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
1062 struct drm_device *dev = msm_host->dev;
1064 if (msm_host->tx_gem_obj) {
1065 msm_gem_put_iova(msm_host->tx_gem_obj, 0);
1066 drm_gem_object_put_unlocked(msm_host->tx_gem_obj);
1067 msm_host->tx_gem_obj = NULL;
1070 if (msm_host->tx_buf)
1071 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1072 msm_host->tx_buf_paddr);
1076 * prepare cmd buffer to be txed
1078 static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1079 const struct mipi_dsi_msg *msg)
1081 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1082 struct mipi_dsi_packet packet;
1087 ret = mipi_dsi_create_packet(&packet, msg);
1089 pr_err("%s: create packet failed, %d\n", __func__, ret);
1092 len = (packet.size + 3) & (~0x3);
1094 if (len > msm_host->tx_size) {
1095 pr_err("%s: packet size is too big\n", __func__);
1099 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
1100 data = msm_gem_get_vaddr(msm_host->tx_gem_obj);
1102 ret = PTR_ERR(data);
1103 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1107 data = msm_host->tx_buf;
1110 /* MSM specific command format in memory */
1111 data[0] = packet.header[1];
1112 data[1] = packet.header[2];
1113 data[2] = packet.header[0];
1114 data[3] = BIT(7); /* Last packet */
1115 if (mipi_dsi_packet_format_is_long(msg->type))
1117 if (msg->rx_buf && msg->rx_len)
1121 if (packet.payload && packet.payload_length)
1122 memcpy(data + 4, packet.payload, packet.payload_length);
1124 /* Append 0xff to the end */
1125 if (packet.size < len)
1126 memset(data + packet.size, 0xff, len - packet.size);
1128 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G)
1129 msm_gem_put_vaddr(msm_host->tx_gem_obj);
1135 * dsi_short_read1_resp: 1 parameter
1137 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1139 u8 *data = msg->rx_buf;
1140 if (data && (msg->rx_len >= 1)) {
1141 *data = buf[1]; /* strip out dcs type */
1144 pr_err("%s: read data does not match with rx_buf len %zu\n",
1145 __func__, msg->rx_len);
1151 * dsi_short_read2_resp: 2 parameter
1153 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1155 u8 *data = msg->rx_buf;
1156 if (data && (msg->rx_len >= 2)) {
1157 data[0] = buf[1]; /* strip out dcs type */
1161 pr_err("%s: read data does not match with rx_buf len %zu\n",
1162 __func__, msg->rx_len);
1167 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1169 /* strip out 4 byte dcs header */
1170 if (msg->rx_buf && msg->rx_len)
1171 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1176 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1178 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1179 struct drm_device *dev = msm_host->dev;
1180 struct msm_drm_private *priv = dev->dev_private;
1185 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
1186 ret = msm_gem_get_iova(msm_host->tx_gem_obj,
1187 priv->kms->aspace, &dma_base);
1189 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1193 dma_base = msm_host->tx_buf_paddr;
1196 reinit_completion(&msm_host->dma_comp);
1198 dsi_wait4video_eng_busy(msm_host);
1200 triggered = msm_dsi_manager_cmd_xfer_trigger(
1201 msm_host->id, dma_base, len);
1203 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1204 msecs_to_jiffies(200));
1216 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1217 u8 *buf, int rx_byte, int pkt_size)
1219 u32 *lp, *temp, data;
1223 int repeated_bytes = 0;
1224 int buf_offset = buf - msm_host->rx_buf;
1228 cnt = (rx_byte + 3) >> 2;
1230 cnt = 4; /* 4 x 32 bits registers only */
1235 read_cnt = pkt_size + 6;
1238 * In case of multiple reads from the panel, after the first read, there
1239 * is possibility that there are some bytes in the payload repeating in
1240 * the RDBK_DATA registers. Since we read all the parameters from the
1241 * panel right from the first byte for every pass. We need to skip the
1242 * repeating bytes and then append the new parameters to the rx buffer.
1244 if (read_cnt > 16) {
1246 /* Any data more than 16 bytes will be shifted out.
1247 * The temp read buffer should already contain these bytes.
1248 * The remaining bytes in read buffer are the repeated bytes.
1250 bytes_shifted = read_cnt - 16;
1251 repeated_bytes = buf_offset - bytes_shifted;
1254 for (i = cnt - 1; i >= 0; i--) {
1255 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1256 *temp++ = ntohl(data); /* to host byte order */
1257 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1260 for (i = repeated_bytes; i < 16; i++)
1266 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1267 const struct mipi_dsi_msg *msg)
1270 int bllp_len = msm_host->mode->hdisplay *
1271 dsi_get_bpp(msm_host->format) / 8;
1273 len = dsi_cmd_dma_add(msm_host, msg);
1275 pr_err("%s: failed to add cmd type = 0x%x\n",
1276 __func__, msg->type);
1280 /* for video mode, do not send cmds more than
1281 * one pixel line, since it only transmit it
1284 /* TODO: if the command is sent in LP mode, the bit rate is only
1285 * half of esc clk rate. In this case, if the video is already
1286 * actively streaming, we need to check more carefully if the
1287 * command can be fit into one BLLP.
1289 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1290 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1295 ret = dsi_cmd_dma_tx(msm_host, len);
1297 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n",
1298 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len);
1305 static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host)
1309 data0 = dsi_read(msm_host, REG_DSI_CTRL);
1311 data1 &= ~DSI_CTRL_ENABLE;
1312 dsi_write(msm_host, REG_DSI_CTRL, data1);
1314 * dsi controller need to be disabled before
1319 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1320 wmb(); /* make sure clocks enabled */
1322 /* dsi controller can only be reset while clocks are running */
1323 dsi_write(msm_host, REG_DSI_RESET, 1);
1324 wmb(); /* make sure reset happen */
1325 dsi_write(msm_host, REG_DSI_RESET, 0);
1326 wmb(); /* controller out of reset */
1327 dsi_write(msm_host, REG_DSI_CTRL, data0);
1328 wmb(); /* make sure dsi controller enabled again */
1331 static void dsi_hpd_worker(struct work_struct *work)
1333 struct msm_dsi_host *msm_host =
1334 container_of(work, struct msm_dsi_host, hpd_work);
1336 drm_helper_hpd_irq_event(msm_host->dev);
1339 static void dsi_err_worker(struct work_struct *work)
1341 struct msm_dsi_host *msm_host =
1342 container_of(work, struct msm_dsi_host, err_work);
1343 u32 status = msm_host->err_work_state;
1345 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1346 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1347 dsi_sw_reset_restore(msm_host);
1349 /* It is safe to clear here because error irq is disabled. */
1350 msm_host->err_work_state = 0;
1352 /* enable dsi error interrupt */
1353 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1356 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1360 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1363 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1364 /* Writing of an extra 0 needed to clear error bits */
1365 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1366 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1370 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1374 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1377 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1378 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1382 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1386 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1388 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1389 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1390 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1391 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1392 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1393 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1394 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1398 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1402 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1404 /* fifo underflow, overflow */
1406 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1407 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1408 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1409 msm_host->err_work_state |=
1410 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1414 static void dsi_status(struct msm_dsi_host *msm_host)
1418 status = dsi_read(msm_host, REG_DSI_STATUS0);
1420 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1421 dsi_write(msm_host, REG_DSI_STATUS0, status);
1422 msm_host->err_work_state |=
1423 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1427 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1431 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1433 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1434 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1435 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1439 static void dsi_error(struct msm_dsi_host *msm_host)
1441 /* disable dsi error interrupt */
1442 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1444 dsi_clk_status(msm_host);
1445 dsi_fifo_status(msm_host);
1446 dsi_ack_err_status(msm_host);
1447 dsi_timeout_status(msm_host);
1448 dsi_status(msm_host);
1449 dsi_dln0_phy_err(msm_host);
1451 queue_work(msm_host->workqueue, &msm_host->err_work);
1454 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1456 struct msm_dsi_host *msm_host = ptr;
1458 unsigned long flags;
1460 if (!msm_host->ctrl_base)
1463 spin_lock_irqsave(&msm_host->intr_lock, flags);
1464 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1465 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1466 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1468 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1470 if (isr & DSI_IRQ_ERROR)
1471 dsi_error(msm_host);
1473 if (isr & DSI_IRQ_VIDEO_DONE)
1474 complete(&msm_host->video_comp);
1476 if (isr & DSI_IRQ_CMD_DMA_DONE)
1477 complete(&msm_host->dma_comp);
1482 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1483 struct device *panel_device)
1485 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1488 if (IS_ERR(msm_host->disp_en_gpio)) {
1489 DBG("cannot get disp-enable-gpios %ld",
1490 PTR_ERR(msm_host->disp_en_gpio));
1491 return PTR_ERR(msm_host->disp_en_gpio);
1494 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1496 if (IS_ERR(msm_host->te_gpio)) {
1497 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1498 return PTR_ERR(msm_host->te_gpio);
1504 static int dsi_host_attach(struct mipi_dsi_host *host,
1505 struct mipi_dsi_device *dsi)
1507 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1510 if (dsi->lanes > msm_host->num_data_lanes)
1513 msm_host->channel = dsi->channel;
1514 msm_host->lanes = dsi->lanes;
1515 msm_host->format = dsi->format;
1516 msm_host->mode_flags = dsi->mode_flags;
1518 msm_dsi_manager_attach_dsi_device(msm_host->id, dsi->mode_flags);
1520 /* Some gpios defined in panel DT need to be controlled by host */
1521 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1525 DBG("id=%d", msm_host->id);
1527 queue_work(msm_host->workqueue, &msm_host->hpd_work);
1532 static int dsi_host_detach(struct mipi_dsi_host *host,
1533 struct mipi_dsi_device *dsi)
1535 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1537 msm_host->device_node = NULL;
1539 DBG("id=%d", msm_host->id);
1541 queue_work(msm_host->workqueue, &msm_host->hpd_work);
1546 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1547 const struct mipi_dsi_msg *msg)
1549 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1552 if (!msg || !msm_host->power_on)
1555 mutex_lock(&msm_host->cmd_mutex);
1556 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1557 mutex_unlock(&msm_host->cmd_mutex);
1562 static struct mipi_dsi_host_ops dsi_host_ops = {
1563 .attach = dsi_host_attach,
1564 .detach = dsi_host_detach,
1565 .transfer = dsi_host_transfer,
1569 * List of supported physical to logical lane mappings.
1570 * For example, the 2nd entry represents the following mapping:
1572 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1574 static const int supported_data_lane_swaps[][4] = {
1585 static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1586 struct device_node *ep)
1588 struct device *dev = &msm_host->pdev->dev;
1589 struct property *prop;
1591 int ret, i, len, num_lanes;
1593 prop = of_find_property(ep, "data-lanes", &len);
1596 "failed to find data lane mapping, using default\n");
1600 num_lanes = len / sizeof(u32);
1602 if (num_lanes < 1 || num_lanes > 4) {
1603 dev_err(dev, "bad number of data lanes\n");
1607 msm_host->num_data_lanes = num_lanes;
1609 ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
1612 dev_err(dev, "failed to read lane data\n");
1617 * compare DT specified physical-logical lane mappings with the ones
1618 * supported by hardware
1620 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1621 const int *swap = supported_data_lane_swaps[i];
1625 * the data-lanes array we get from DT has a logical->physical
1626 * mapping. The "data lane swap" register field represents
1627 * supported configurations in a physical->logical mapping.
1628 * Translate the DT mapping to what we understand and find a
1629 * configuration that works.
1631 for (j = 0; j < num_lanes; j++) {
1632 if (lane_map[j] < 0 || lane_map[j] > 3)
1633 dev_err(dev, "bad physical lane entry %u\n",
1636 if (swap[lane_map[j]] != j)
1640 if (j == num_lanes) {
1641 msm_host->dlane_swap = i;
1649 static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1651 struct device *dev = &msm_host->pdev->dev;
1652 struct device_node *np = dev->of_node;
1653 struct device_node *endpoint, *device_node;
1657 * Get the endpoint of the output port of the DSI host. In our case,
1658 * this is mapped to port number with reg = 1. Don't return an error if
1659 * the remote endpoint isn't defined. It's possible that there is
1660 * nothing connected to the dsi output.
1662 endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
1664 dev_dbg(dev, "%s: no endpoint\n", __func__);
1668 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1670 dev_err(dev, "%s: invalid lane configuration %d\n",
1675 /* Get panel node from the output port's endpoint data */
1676 device_node = of_graph_get_remote_node(np, 1, 0);
1678 dev_dbg(dev, "%s: no valid device\n", __func__);
1682 msm_host->device_node = device_node;
1684 if (of_property_read_bool(np, "syscon-sfpb")) {
1685 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1687 if (IS_ERR(msm_host->sfpb)) {
1688 dev_err(dev, "%s: failed to get sfpb regmap\n",
1690 ret = PTR_ERR(msm_host->sfpb);
1694 of_node_put(device_node);
1697 of_node_put(endpoint);
1702 static int dsi_host_get_id(struct msm_dsi_host *msm_host)
1704 struct platform_device *pdev = msm_host->pdev;
1705 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
1706 struct resource *res;
1709 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
1713 for (i = 0; i < cfg->num_dsi; i++) {
1714 if (cfg->io_start[i] == res->start)
1721 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1723 struct msm_dsi_host *msm_host = NULL;
1724 struct platform_device *pdev = msm_dsi->pdev;
1727 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1729 pr_err("%s: FAILED: cannot alloc dsi host\n",
1735 msm_host->pdev = pdev;
1736 msm_dsi->host = &msm_host->base;
1738 ret = dsi_host_parse_dt(msm_host);
1740 pr_err("%s: failed to parse dt\n", __func__);
1744 msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
1745 if (IS_ERR(msm_host->ctrl_base)) {
1746 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1747 ret = PTR_ERR(msm_host->ctrl_base);
1751 pm_runtime_enable(&pdev->dev);
1753 msm_host->cfg_hnd = dsi_get_config(msm_host);
1754 if (!msm_host->cfg_hnd) {
1756 pr_err("%s: get config failed\n", __func__);
1760 msm_host->id = dsi_host_get_id(msm_host);
1761 if (msm_host->id < 0) {
1763 pr_err("%s: unable to identify DSI host index\n", __func__);
1767 /* fixup base address by io offset */
1768 msm_host->ctrl_base += msm_host->cfg_hnd->cfg->io_offset;
1770 ret = dsi_regulator_init(msm_host);
1772 pr_err("%s: regulator init failed\n", __func__);
1776 ret = dsi_clk_init(msm_host);
1778 pr_err("%s: unable to initialize dsi clks\n", __func__);
1782 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1783 if (!msm_host->rx_buf) {
1785 pr_err("%s: alloc rx temp buf failed\n", __func__);
1789 init_completion(&msm_host->dma_comp);
1790 init_completion(&msm_host->video_comp);
1791 mutex_init(&msm_host->dev_mutex);
1792 mutex_init(&msm_host->cmd_mutex);
1793 spin_lock_init(&msm_host->intr_lock);
1795 /* setup workqueue */
1796 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1797 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1798 INIT_WORK(&msm_host->hpd_work, dsi_hpd_worker);
1800 msm_dsi->id = msm_host->id;
1802 DBG("Dsi Host %d initialized", msm_host->id);
1809 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1811 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1814 dsi_tx_buf_free(msm_host);
1815 if (msm_host->workqueue) {
1816 flush_workqueue(msm_host->workqueue);
1817 destroy_workqueue(msm_host->workqueue);
1818 msm_host->workqueue = NULL;
1821 mutex_destroy(&msm_host->cmd_mutex);
1822 mutex_destroy(&msm_host->dev_mutex);
1824 pm_runtime_disable(&msm_host->pdev->dev);
1827 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
1828 struct drm_device *dev)
1830 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1831 struct platform_device *pdev = msm_host->pdev;
1834 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1835 if (msm_host->irq < 0) {
1836 ret = msm_host->irq;
1837 dev_err(dev->dev, "failed to get irq: %d\n", ret);
1841 ret = devm_request_irq(&pdev->dev, msm_host->irq,
1842 dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
1843 "dsi_isr", msm_host);
1845 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1846 msm_host->irq, ret);
1850 msm_host->dev = dev;
1851 ret = dsi_tx_buf_alloc(msm_host, SZ_4K);
1853 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
1860 int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
1862 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1865 /* Register mipi dsi host */
1866 if (!msm_host->registered) {
1867 host->dev = &msm_host->pdev->dev;
1868 host->ops = &dsi_host_ops;
1869 ret = mipi_dsi_host_register(host);
1873 msm_host->registered = true;
1875 /* If the panel driver has not been probed after host register,
1876 * we should defer the host's probe.
1877 * It makes sure panel is connected when fbcon detects
1878 * connector status and gets the proper display mode to
1879 * create framebuffer.
1880 * Don't try to defer if there is nothing connected to the dsi
1883 if (check_defer && msm_host->device_node) {
1884 if (!of_drm_find_panel(msm_host->device_node))
1885 if (!of_drm_find_bridge(msm_host->device_node))
1886 return -EPROBE_DEFER;
1893 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
1895 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1897 if (msm_host->registered) {
1898 mipi_dsi_host_unregister(host);
1901 msm_host->registered = false;
1905 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
1906 const struct mipi_dsi_msg *msg)
1908 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1910 /* TODO: make sure dsi_cmd_mdp is idle.
1911 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
1912 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
1913 * How to handle the old versions? Wait for mdp cmd done?
1917 * mdss interrupt is generated in mdp core clock domain
1918 * mdp clock need to be enabled to receive dsi interrupt
1920 pm_runtime_get_sync(&msm_host->pdev->dev);
1921 dsi_link_clk_enable(msm_host);
1923 /* TODO: vote for bus bandwidth */
1925 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
1926 dsi_set_tx_power_mode(0, msm_host);
1928 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
1929 dsi_write(msm_host, REG_DSI_CTRL,
1930 msm_host->dma_cmd_ctrl_restore |
1931 DSI_CTRL_CMD_MODE_EN |
1933 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
1938 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
1939 const struct mipi_dsi_msg *msg)
1941 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1943 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
1944 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
1946 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
1947 dsi_set_tx_power_mode(1, msm_host);
1949 /* TODO: unvote for bus bandwidth */
1951 dsi_link_clk_disable(msm_host);
1952 pm_runtime_put_autosuspend(&msm_host->pdev->dev);
1955 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
1956 const struct mipi_dsi_msg *msg)
1958 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1960 return dsi_cmds2buf_tx(msm_host, msg);
1963 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
1964 const struct mipi_dsi_msg *msg)
1966 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1967 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1968 int data_byte, rx_byte, dlen, end;
1969 int short_response, diff, pkt_size, ret = 0;
1971 int rlen = msg->rx_len;
1980 data_byte = 10; /* first read */
1981 if (rlen < data_byte)
1984 pkt_size = data_byte;
1985 rx_byte = data_byte + 6; /* 4 header + 2 crc */
1988 buf = msm_host->rx_buf;
1991 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
1992 struct mipi_dsi_msg max_pkt_size_msg = {
1993 .channel = msg->channel,
1994 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
1999 DBG("rlen=%d pkt_size=%d rx_byte=%d",
2000 rlen, pkt_size, rx_byte);
2002 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
2004 pr_err("%s: Set max pkt size failed, %d\n",
2009 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
2010 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
2011 /* Clear the RDBK_DATA registers */
2012 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
2013 DSI_RDBK_DATA_CTRL_CLR);
2014 wmb(); /* make sure the RDBK registers are cleared */
2015 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
2016 wmb(); /* release cleared status before transfer */
2019 ret = dsi_cmds2buf_tx(msm_host, msg);
2020 if (ret < msg->tx_len) {
2021 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
2026 * once cmd_dma_done interrupt received,
2027 * return data from client is ready and stored
2028 * at RDBK_DATA register already
2029 * since rx fifo is 16 bytes, dcs header is kept at first loop,
2030 * after that dcs header lost during shift into registers
2032 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
2040 if (rlen <= data_byte) {
2041 diff = data_byte - rlen;
2049 dlen -= 2; /* 2 crc */
2051 buf += dlen; /* next start position */
2052 data_byte = 14; /* NOT first read */
2053 if (rlen < data_byte)
2056 pkt_size += data_byte;
2057 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
2062 * For single Long read, if the requested rlen < 10,
2063 * we need to shift the start position of rx
2064 * data buffer to skip the bytes which are not
2067 if (pkt_size < 10 && !short_response)
2068 buf = msm_host->rx_buf + (10 - rlen);
2070 buf = msm_host->rx_buf;
2074 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2075 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2078 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2079 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2080 ret = dsi_short_read1_resp(buf, msg);
2082 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2083 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2084 ret = dsi_short_read2_resp(buf, msg);
2086 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2087 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2088 ret = dsi_long_read_resp(buf, msg);
2091 pr_warn("%s:Invalid response cmd\n", __func__);
2098 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2101 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2103 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2104 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2105 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2107 /* Make sure trigger happens */
2111 int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
2112 struct msm_dsi_pll *src_pll)
2114 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2115 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2116 struct clk *byte_clk_provider, *pixel_clk_provider;
2119 ret = msm_dsi_pll_get_clk_provider(src_pll,
2120 &byte_clk_provider, &pixel_clk_provider);
2122 pr_info("%s: can't get provider from pll, don't set parent\n",
2127 ret = clk_set_parent(msm_host->byte_clk_src, byte_clk_provider);
2129 pr_err("%s: can't set parent to byte_clk_src. ret=%d\n",
2134 ret = clk_set_parent(msm_host->pixel_clk_src, pixel_clk_provider);
2136 pr_err("%s: can't set parent to pixel_clk_src. ret=%d\n",
2141 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
2142 ret = clk_set_parent(msm_host->dsi_clk_src, pixel_clk_provider);
2144 pr_err("%s: can't set parent to dsi_clk_src. ret=%d\n",
2149 ret = clk_set_parent(msm_host->esc_clk_src, byte_clk_provider);
2151 pr_err("%s: can't set parent to esc_clk_src. ret=%d\n",
2161 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
2163 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2166 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
2167 /* Make sure fully reset */
2170 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
2174 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
2175 struct msm_dsi_phy_clk_request *clk_req)
2177 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2180 ret = dsi_calc_clk_rate(msm_host);
2182 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2186 clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
2187 clk_req->escclk_rate = msm_host->esc_clk_rate;
2190 int msm_dsi_host_enable(struct mipi_dsi_host *host)
2192 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2194 dsi_op_mode_config(msm_host,
2195 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2197 /* TODO: clock should be turned off for command mode,
2198 * and only turned on before MDP START.
2199 * This part of code should be enabled once mdp driver support it.
2201 /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
2202 * dsi_link_clk_disable(msm_host);
2203 * pm_runtime_put_autosuspend(&msm_host->pdev->dev);
2210 int msm_dsi_host_disable(struct mipi_dsi_host *host)
2212 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2214 dsi_op_mode_config(msm_host,
2215 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2217 /* Since we have disabled INTF, the video engine won't stop so that
2218 * the cmd engine will be blocked.
2219 * Reset to disable video engine so that we can send off cmd.
2221 dsi_sw_reset(msm_host);
2226 static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2228 enum sfpb_ahb_arb_master_port_en en;
2230 if (!msm_host->sfpb)
2233 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2235 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2236 SFPB_GPREG_MASTER_PORT_EN__MASK,
2237 SFPB_GPREG_MASTER_PORT_EN(en));
2240 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
2241 struct msm_dsi_phy_shared_timings *phy_shared_timings)
2243 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2246 mutex_lock(&msm_host->dev_mutex);
2247 if (msm_host->power_on) {
2248 DBG("dsi host already on");
2252 msm_dsi_sfpb_config(msm_host, true);
2254 ret = dsi_host_regulator_enable(msm_host);
2256 pr_err("%s:Failed to enable vregs.ret=%d\n",
2261 pm_runtime_get_sync(&msm_host->pdev->dev);
2262 ret = dsi_link_clk_enable(msm_host);
2264 pr_err("%s: failed to enable link clocks. ret=%d\n",
2266 goto fail_disable_reg;
2269 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2271 pr_err("%s: failed to set pinctrl default state, %d\n",
2273 goto fail_disable_clk;
2276 dsi_timing_setup(msm_host);
2277 dsi_sw_reset(msm_host);
2278 dsi_ctrl_config(msm_host, true, phy_shared_timings);
2280 if (msm_host->disp_en_gpio)
2281 gpiod_set_value(msm_host->disp_en_gpio, 1);
2283 msm_host->power_on = true;
2284 mutex_unlock(&msm_host->dev_mutex);
2289 dsi_link_clk_disable(msm_host);
2290 pm_runtime_put_autosuspend(&msm_host->pdev->dev);
2292 dsi_host_regulator_disable(msm_host);
2294 mutex_unlock(&msm_host->dev_mutex);
2298 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2300 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2302 mutex_lock(&msm_host->dev_mutex);
2303 if (!msm_host->power_on) {
2304 DBG("dsi host already off");
2308 dsi_ctrl_config(msm_host, false, NULL);
2310 if (msm_host->disp_en_gpio)
2311 gpiod_set_value(msm_host->disp_en_gpio, 0);
2313 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2315 dsi_link_clk_disable(msm_host);
2316 pm_runtime_put_autosuspend(&msm_host->pdev->dev);
2318 dsi_host_regulator_disable(msm_host);
2320 msm_dsi_sfpb_config(msm_host, false);
2324 msm_host->power_on = false;
2327 mutex_unlock(&msm_host->dev_mutex);
2331 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2332 struct drm_display_mode *mode)
2334 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2336 if (msm_host->mode) {
2337 drm_mode_destroy(msm_host->dev, msm_host->mode);
2338 msm_host->mode = NULL;
2341 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2342 if (!msm_host->mode) {
2343 pr_err("%s: cannot duplicate mode\n", __func__);
2350 struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
2351 unsigned long *panel_flags)
2353 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2354 struct drm_panel *panel;
2356 panel = of_drm_find_panel(msm_host->device_node);
2358 *panel_flags = msm_host->mode_flags;
2363 struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host)
2365 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2367 return of_drm_find_bridge(msm_host->device_node);