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 byte_intf_clk_rate;
126 unsigned long pixel_clk_rate;
127 unsigned long esc_clk_rate;
129 /* DSI v2 specific clocks */
131 struct clk *esc_clk_src;
132 struct clk *dsi_clk_src;
134 unsigned long src_clk_rate;
136 struct gpio_desc *disp_en_gpio;
137 struct gpio_desc *te_gpio;
139 const struct msm_dsi_cfg_handler *cfg_hnd;
141 struct completion dma_comp;
142 struct completion video_comp;
143 struct mutex dev_mutex;
144 struct mutex cmd_mutex;
145 spinlock_t intr_lock; /* Protect interrupt ctrl register */
148 struct work_struct err_work;
149 struct workqueue_struct *workqueue;
151 /* DSI 6G TX buffer*/
152 struct drm_gem_object *tx_gem_obj;
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 ahb_clk = msm_clk_get(msm_host->pdev, "iface");
218 if (IS_ERR(ahb_clk)) {
219 pr_err("%s: cannot get interface clock\n", __func__);
223 pm_runtime_get_sync(dev);
225 ret = clk_prepare_enable(ahb_clk);
227 pr_err("%s: unable to enable ahb_clk\n", __func__);
231 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
233 pr_err("%s: Invalid version\n", __func__);
237 cfg_hnd = msm_dsi_cfg_get(major, minor);
239 DBG("%s: Version %x:%x\n", __func__, major, minor);
242 clk_disable_unprepare(ahb_clk);
244 pm_runtime_put_sync(dev);
249 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
251 return container_of(host, struct msm_dsi_host, base);
254 int dsi_clk_init_v2(struct msm_dsi_host *msm_host)
256 struct platform_device *pdev = msm_host->pdev;
259 msm_host->src_clk = msm_clk_get(pdev, "src");
261 if (IS_ERR(msm_host->src_clk)) {
262 ret = PTR_ERR(msm_host->src_clk);
263 pr_err("%s: can't find src clock. ret=%d\n",
265 msm_host->src_clk = NULL;
269 msm_host->esc_clk_src = clk_get_parent(msm_host->esc_clk);
270 if (!msm_host->esc_clk_src) {
272 pr_err("%s: can't get esc clock parent. ret=%d\n",
277 msm_host->dsi_clk_src = clk_get_parent(msm_host->src_clk);
278 if (!msm_host->dsi_clk_src) {
280 pr_err("%s: can't get src clock parent. ret=%d\n",
287 int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host)
289 struct platform_device *pdev = msm_host->pdev;
292 msm_host->byte_intf_clk = msm_clk_get(pdev, "byte_intf");
293 if (IS_ERR(msm_host->byte_intf_clk)) {
294 ret = PTR_ERR(msm_host->byte_intf_clk);
295 pr_err("%s: can't find byte_intf clock. ret=%d\n",
302 static int dsi_clk_init(struct msm_dsi_host *msm_host)
304 struct platform_device *pdev = msm_host->pdev;
305 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
306 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
310 for (i = 0; i < cfg->num_bus_clks; i++)
311 msm_host->bus_clks[i].id = cfg->bus_clk_names[i];
312 msm_host->num_bus_clks = cfg->num_bus_clks;
314 ret = devm_clk_bulk_get(&pdev->dev, msm_host->num_bus_clks, msm_host->bus_clks);
316 dev_err(&pdev->dev, "Unable to get clocks, ret = %d\n", ret);
320 /* get link and source clocks */
321 msm_host->byte_clk = msm_clk_get(pdev, "byte");
322 if (IS_ERR(msm_host->byte_clk)) {
323 ret = PTR_ERR(msm_host->byte_clk);
324 pr_err("%s: can't find dsi_byte clock. ret=%d\n",
326 msm_host->byte_clk = NULL;
330 msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
331 if (IS_ERR(msm_host->pixel_clk)) {
332 ret = PTR_ERR(msm_host->pixel_clk);
333 pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
335 msm_host->pixel_clk = NULL;
339 msm_host->esc_clk = msm_clk_get(pdev, "core");
340 if (IS_ERR(msm_host->esc_clk)) {
341 ret = PTR_ERR(msm_host->esc_clk);
342 pr_err("%s: can't find dsi_esc clock. ret=%d\n",
344 msm_host->esc_clk = NULL;
348 msm_host->byte_clk_src = clk_get_parent(msm_host->byte_clk);
349 if (IS_ERR(msm_host->byte_clk_src)) {
350 ret = PTR_ERR(msm_host->byte_clk_src);
351 pr_err("%s: can't find byte_clk clock. ret=%d\n", __func__, ret);
355 msm_host->pixel_clk_src = clk_get_parent(msm_host->pixel_clk);
356 if (IS_ERR(msm_host->pixel_clk_src)) {
357 ret = PTR_ERR(msm_host->pixel_clk_src);
358 pr_err("%s: can't find pixel_clk clock. ret=%d\n", __func__, ret);
362 if (cfg_hnd->ops->clk_init_ver)
363 ret = cfg_hnd->ops->clk_init_ver(msm_host);
368 int msm_dsi_runtime_suspend(struct device *dev)
370 struct platform_device *pdev = to_platform_device(dev);
371 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
372 struct mipi_dsi_host *host = msm_dsi->host;
373 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
375 if (!msm_host->cfg_hnd)
378 clk_bulk_disable_unprepare(msm_host->num_bus_clks, msm_host->bus_clks);
383 int msm_dsi_runtime_resume(struct device *dev)
385 struct platform_device *pdev = to_platform_device(dev);
386 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
387 struct mipi_dsi_host *host = msm_dsi->host;
388 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
390 if (!msm_host->cfg_hnd)
393 return clk_bulk_prepare_enable(msm_host->num_bus_clks, msm_host->bus_clks);
396 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
400 DBG("Set clk rates: pclk=%d, byteclk=%lu",
401 msm_host->mode->clock, msm_host->byte_clk_rate);
403 ret = dev_pm_opp_set_rate(&msm_host->pdev->dev,
404 msm_host->byte_clk_rate);
406 pr_err("%s: dev_pm_opp_set_rate failed %d\n", __func__, ret);
410 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
412 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
416 if (msm_host->byte_intf_clk) {
417 ret = clk_set_rate(msm_host->byte_intf_clk, msm_host->byte_intf_clk_rate);
419 pr_err("%s: Failed to set rate byte intf clk, %d\n",
429 int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
433 ret = clk_prepare_enable(msm_host->esc_clk);
435 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
439 ret = clk_prepare_enable(msm_host->byte_clk);
441 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
445 ret = clk_prepare_enable(msm_host->pixel_clk);
447 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
451 ret = clk_prepare_enable(msm_host->byte_intf_clk);
453 pr_err("%s: Failed to enable byte intf clk\n",
455 goto byte_intf_clk_err;
461 clk_disable_unprepare(msm_host->pixel_clk);
463 clk_disable_unprepare(msm_host->byte_clk);
465 clk_disable_unprepare(msm_host->esc_clk);
470 int dsi_link_clk_set_rate_v2(struct msm_dsi_host *msm_host)
474 DBG("Set clk rates: pclk=%d, byteclk=%lu, esc_clk=%lu, dsi_src_clk=%lu",
475 msm_host->mode->clock, msm_host->byte_clk_rate,
476 msm_host->esc_clk_rate, msm_host->src_clk_rate);
478 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
480 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
484 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
486 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
490 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
492 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
496 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
498 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
505 int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
509 ret = clk_prepare_enable(msm_host->byte_clk);
511 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
515 ret = clk_prepare_enable(msm_host->esc_clk);
517 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
521 ret = clk_prepare_enable(msm_host->src_clk);
523 pr_err("%s: Failed to enable dsi src clk\n", __func__);
527 ret = clk_prepare_enable(msm_host->pixel_clk);
529 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
536 clk_disable_unprepare(msm_host->src_clk);
538 clk_disable_unprepare(msm_host->esc_clk);
540 clk_disable_unprepare(msm_host->byte_clk);
545 void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host)
547 /* Drop the performance state vote */
548 dev_pm_opp_set_rate(&msm_host->pdev->dev, 0);
549 clk_disable_unprepare(msm_host->esc_clk);
550 clk_disable_unprepare(msm_host->pixel_clk);
551 clk_disable_unprepare(msm_host->byte_intf_clk);
552 clk_disable_unprepare(msm_host->byte_clk);
555 void dsi_link_clk_disable_v2(struct msm_dsi_host *msm_host)
557 clk_disable_unprepare(msm_host->pixel_clk);
558 clk_disable_unprepare(msm_host->src_clk);
559 clk_disable_unprepare(msm_host->esc_clk);
560 clk_disable_unprepare(msm_host->byte_clk);
563 static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode, bool is_bonded_dsi)
565 unsigned long pclk_rate;
567 pclk_rate = mode->clock * 1000;
570 * For bonded DSI mode, the current DRM mode has the complete width of the
571 * panel. Since, the complete panel is driven by two DSI controllers,
572 * the clock rates have to be split between the two dsi controllers.
573 * Adjust the byte and pixel clock rates for each dsi host accordingly.
581 unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_dsi,
582 const struct drm_display_mode *mode)
584 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
585 u8 lanes = msm_host->lanes;
586 u32 bpp = dsi_get_bpp(msm_host->format);
587 unsigned long pclk_rate = dsi_get_pclk_rate(mode, is_bonded_dsi);
588 u64 pclk_bpp = (u64)pclk_rate * bpp;
591 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
595 /* CPHY "byte_clk" is in units of 16 bits */
596 if (msm_host->cphy_mode)
597 do_div(pclk_bpp, (16 * lanes));
599 do_div(pclk_bpp, (8 * lanes));
604 static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
606 msm_host->pixel_clk_rate = dsi_get_pclk_rate(msm_host->mode, is_bonded_dsi);
607 msm_host->byte_clk_rate = dsi_byte_clk_get_rate(&msm_host->base, is_bonded_dsi,
610 DBG("pclk=%lu, bclk=%lu", msm_host->pixel_clk_rate,
611 msm_host->byte_clk_rate);
615 int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
617 if (!msm_host->mode) {
618 pr_err("%s: mode not set\n", __func__);
622 dsi_calc_pclk(msm_host, is_bonded_dsi);
623 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
627 int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
629 u32 bpp = dsi_get_bpp(msm_host->format);
631 unsigned int esc_mhz, esc_div;
632 unsigned long byte_mhz;
634 dsi_calc_pclk(msm_host, is_bonded_dsi);
636 pclk_bpp = (u64)dsi_get_pclk_rate(msm_host->mode, is_bonded_dsi) * bpp;
638 msm_host->src_clk_rate = pclk_bpp;
641 * esc clock is byte clock followed by a 4 bit divider,
642 * we need to find an escape clock frequency within the
643 * mipi DSI spec range within the maximum divider limit
644 * We iterate here between an escape clock frequencey
645 * between 20 Mhz to 5 Mhz and pick up the first one
646 * that can be supported by our divider
649 byte_mhz = msm_host->byte_clk_rate / 1000000;
651 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
652 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
655 * TODO: Ideally, we shouldn't know what sort of divider
656 * is available in mmss_cc, we're just assuming that
657 * it'll always be a 4 bit divider. Need to come up with
660 if (esc_div >= 1 && esc_div <= 16)
667 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
669 DBG("esc=%lu, src=%lu", msm_host->esc_clk_rate,
670 msm_host->src_clk_rate);
675 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
680 spin_lock_irqsave(&msm_host->intr_lock, flags);
681 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
688 DBG("intr=%x enable=%d", intr, enable);
690 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
691 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
694 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
696 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
698 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
699 return NON_BURST_SYNCH_PULSE;
701 return NON_BURST_SYNCH_EVENT;
704 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
705 const enum mipi_dsi_pixel_format mipi_fmt)
708 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
709 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
710 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
711 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
712 default: return VID_DST_FORMAT_RGB888;
716 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
717 const enum mipi_dsi_pixel_format mipi_fmt)
720 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
721 case MIPI_DSI_FMT_RGB666_PACKED:
722 case MIPI_DSI_FMT_RGB666: return CMD_DST_FORMAT_RGB666;
723 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
724 default: return CMD_DST_FORMAT_RGB888;
728 static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
729 struct msm_dsi_phy_shared_timings *phy_shared_timings, struct msm_dsi_phy *phy)
731 u32 flags = msm_host->mode_flags;
732 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
733 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
734 u32 data = 0, lane_ctrl = 0;
737 dsi_write(msm_host, REG_DSI_CTRL, 0);
741 if (flags & MIPI_DSI_MODE_VIDEO) {
742 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
743 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
744 if (flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
745 data |= DSI_VID_CFG0_HFP_POWER_STOP;
746 if (flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
747 data |= DSI_VID_CFG0_HBP_POWER_STOP;
748 if (flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
749 data |= DSI_VID_CFG0_HSA_POWER_STOP;
750 /* Always set low power stop mode for BLLP
751 * to let command engine send packets
753 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
754 DSI_VID_CFG0_BLLP_POWER_STOP;
755 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
756 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
757 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
758 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
760 /* Do not swap RGB colors */
761 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
762 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
764 /* Do not swap RGB colors */
765 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
766 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
767 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
769 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
770 DSI_CMD_CFG1_WR_MEM_CONTINUE(
771 MIPI_DCS_WRITE_MEMORY_CONTINUE);
772 /* Always insert DCS command */
773 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
774 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
777 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
778 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
779 DSI_CMD_DMA_CTRL_LOW_POWER);
782 /* Always assume dedicated TE pin */
783 data |= DSI_TRIG_CTRL_TE;
784 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
785 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
786 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
787 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
788 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
789 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
790 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
792 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(phy_shared_timings->clk_post) |
793 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(phy_shared_timings->clk_pre);
794 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
796 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
797 (cfg_hnd->minor > MSM_DSI_6G_VER_MINOR_V1_0) &&
798 phy_shared_timings->clk_pre_inc_by_2)
799 dsi_write(msm_host, REG_DSI_T_CLK_PRE_EXTEND,
800 DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK);
803 if (!(flags & MIPI_DSI_MODE_NO_EOT_PACKET))
804 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
805 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
807 /* allow only ack-err-status to generate interrupt */
808 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
810 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
812 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
814 data = DSI_CTRL_CLK_EN;
816 DBG("lane number=%d", msm_host->lanes);
817 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
819 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
820 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
822 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) {
823 lane_ctrl = dsi_read(msm_host, REG_DSI_LANE_CTRL);
825 if (msm_dsi_phy_set_continuous_clock(phy, enable))
826 lane_ctrl &= ~DSI_LANE_CTRL_HS_REQ_SEL_PHY;
828 dsi_write(msm_host, REG_DSI_LANE_CTRL,
829 lane_ctrl | DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
832 data |= DSI_CTRL_ENABLE;
834 dsi_write(msm_host, REG_DSI_CTRL, data);
836 if (msm_host->cphy_mode)
837 dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
840 static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mode, u32 hdisplay)
842 struct drm_dsc_config *dsc = msm_host->dsc;
843 u32 reg, reg_ctrl, reg_ctrl2;
844 u32 slice_per_intf, total_bytes_per_intf;
848 /* first calculate dsc parameters and then program
849 * compress mode registers
851 slice_per_intf = DIV_ROUND_UP(hdisplay, dsc->slice_width);
854 * If slice_count is greater than slice_per_intf
855 * then default to 1. This can happen during partial
858 if (dsc->slice_count > slice_per_intf)
859 dsc->slice_count = 1;
861 total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
863 eol_byte_num = total_bytes_per_intf % 3;
864 pkt_per_line = slice_per_intf / dsc->slice_count;
866 if (is_cmd_mode) /* packet data type */
867 reg = DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_LONG_WRITE);
869 reg = DSI_VIDEO_COMPRESSION_MODE_CTRL_DATATYPE(MIPI_DSI_COMPRESSED_PIXEL_STREAM);
871 /* DSI_VIDEO_COMPRESSION_MODE & DSI_COMMAND_COMPRESSION_MODE
872 * registers have similar offsets, so for below common code use
873 * DSI_VIDEO_COMPRESSION_MODE_XXXX for setting bits
875 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_PKT_PER_LINE(pkt_per_line >> 1);
876 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EOL_BYTE_NUM(eol_byte_num);
877 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EN;
880 reg_ctrl = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL);
881 reg_ctrl2 = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2);
886 reg_ctrl2 &= ~DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH__MASK;
887 reg_ctrl2 |= DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH(dsc->slice_chunk_size);
889 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
890 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
892 dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
896 static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
898 struct drm_display_mode *mode = msm_host->mode;
899 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
900 u32 h_total = mode->htotal;
901 u32 v_total = mode->vtotal;
902 u32 hs_end = mode->hsync_end - mode->hsync_start;
903 u32 vs_end = mode->vsync_end - mode->vsync_start;
904 u32 ha_start = h_total - mode->hsync_start;
905 u32 ha_end = ha_start + mode->hdisplay;
906 u32 va_start = v_total - mode->vsync_start;
907 u32 va_end = va_start + mode->vdisplay;
908 u32 hdisplay = mode->hdisplay;
915 * For bonded DSI mode, the current DRM mode has
916 * the complete width of the panel. Since, the complete
917 * panel is driven by two DSI controllers, the horizontal
918 * timings have to be split between the two dsi controllers.
919 * Adjust the DSI host timing values accordingly.
930 struct drm_dsc_config *dsc = msm_host->dsc;
932 /* update dsc params with timing params */
933 if (!dsc || !mode->hdisplay || !mode->vdisplay) {
934 pr_err("DSI: invalid input: pic_width: %d pic_height: %d\n",
935 mode->hdisplay, mode->vdisplay);
939 dsc->pic_width = mode->hdisplay;
940 dsc->pic_height = mode->vdisplay;
941 DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);
943 /* we do the calculations for dsc parameters here so that
944 * panel can use these parameters
946 ret = dsi_populate_dsc_params(msm_host, dsc);
950 /* Divide the display by 3 but keep back/font porch and
956 ha_end = ha_start + hdisplay;
959 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
961 dsi_update_dsc_timing(msm_host, false, mode->hdisplay);
963 dsi_write(msm_host, REG_DSI_ACTIVE_H,
964 DSI_ACTIVE_H_START(ha_start) |
965 DSI_ACTIVE_H_END(ha_end));
966 dsi_write(msm_host, REG_DSI_ACTIVE_V,
967 DSI_ACTIVE_V_START(va_start) |
968 DSI_ACTIVE_V_END(va_end));
969 dsi_write(msm_host, REG_DSI_TOTAL,
970 DSI_TOTAL_H_TOTAL(h_total - 1) |
971 DSI_TOTAL_V_TOTAL(v_total - 1));
973 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
974 DSI_ACTIVE_HSYNC_START(hs_start) |
975 DSI_ACTIVE_HSYNC_END(hs_end));
976 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
977 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
978 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
979 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
980 } else { /* command mode */
982 dsi_update_dsc_timing(msm_host, true, mode->hdisplay);
984 /* image data and 1 byte write_memory_start cmd */
986 wc = hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
988 wc = msm_host->dsc->slice_chunk_size * msm_host->dsc->slice_count + 1;
990 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_CTRL,
991 DSI_CMD_MDP_STREAM0_CTRL_WORD_COUNT(wc) |
992 DSI_CMD_MDP_STREAM0_CTRL_VIRTUAL_CHANNEL(
994 DSI_CMD_MDP_STREAM0_CTRL_DATA_TYPE(
995 MIPI_DSI_DCS_LONG_WRITE));
997 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL,
998 DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) |
999 DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay));
1003 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
1007 ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1009 if (ctrl & DSI_CTRL_ENABLE) {
1010 dsi_write(msm_host, REG_DSI_CTRL, ctrl & ~DSI_CTRL_ENABLE);
1012 * dsi controller need to be disabled before
1018 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1019 wmb(); /* clocks need to be enabled before reset */
1021 /* dsi controller can only be reset while clocks are running */
1022 dsi_write(msm_host, REG_DSI_RESET, 1);
1023 msleep(DSI_RESET_TOGGLE_DELAY_MS); /* make sure reset happen */
1024 dsi_write(msm_host, REG_DSI_RESET, 0);
1025 wmb(); /* controller out of reset */
1027 if (ctrl & DSI_CTRL_ENABLE) {
1028 dsi_write(msm_host, REG_DSI_CTRL, ctrl);
1029 wmb(); /* make sure dsi controller enabled again */
1033 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
1034 bool video_mode, bool enable)
1038 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1041 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
1042 DSI_CTRL_CMD_MODE_EN);
1043 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
1044 DSI_IRQ_MASK_VIDEO_DONE, 0);
1047 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
1048 } else { /* command mode */
1049 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
1050 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
1052 dsi_ctrl |= DSI_CTRL_ENABLE;
1055 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
1058 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
1062 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
1065 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
1067 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
1069 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
1072 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
1075 struct device *dev = &msm_host->pdev->dev;
1077 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
1079 reinit_completion(&msm_host->video_comp);
1081 ret = wait_for_completion_timeout(&msm_host->video_comp,
1082 msecs_to_jiffies(70));
1085 DRM_DEV_ERROR(dev, "wait for video done timed out\n");
1087 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
1090 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
1092 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
1095 if (msm_host->power_on && msm_host->enabled) {
1096 dsi_wait4video_done(msm_host);
1097 /* delay 4 ms to skip BLLP */
1098 usleep_range(2000, 4000);
1102 int dsi_tx_buf_alloc_6g(struct msm_dsi_host *msm_host, int size)
1104 struct drm_device *dev = msm_host->dev;
1105 struct msm_drm_private *priv = dev->dev_private;
1109 data = msm_gem_kernel_new(dev, size, MSM_BO_WC,
1111 &msm_host->tx_gem_obj, &iova);
1114 msm_host->tx_gem_obj = NULL;
1115 return PTR_ERR(data);
1118 msm_gem_object_set_name(msm_host->tx_gem_obj, "tx_gem");
1120 msm_host->tx_size = msm_host->tx_gem_obj->size;
1125 int dsi_tx_buf_alloc_v2(struct msm_dsi_host *msm_host, int size)
1127 struct drm_device *dev = msm_host->dev;
1129 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1130 &msm_host->tx_buf_paddr, GFP_KERNEL);
1131 if (!msm_host->tx_buf)
1134 msm_host->tx_size = size;
1139 static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
1141 struct drm_device *dev = msm_host->dev;
1142 struct msm_drm_private *priv;
1145 * This is possible if we're tearing down before we've had a chance to
1146 * fully initialize. A very real possibility if our probe is deferred,
1147 * in which case we'll hit msm_dsi_host_destroy() without having run
1148 * through the dsi_tx_buf_alloc().
1153 priv = dev->dev_private;
1154 if (msm_host->tx_gem_obj) {
1155 msm_gem_unpin_iova(msm_host->tx_gem_obj, priv->kms->aspace);
1156 drm_gem_object_put(msm_host->tx_gem_obj);
1157 msm_host->tx_gem_obj = NULL;
1160 if (msm_host->tx_buf)
1161 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1162 msm_host->tx_buf_paddr);
1165 void *dsi_tx_buf_get_6g(struct msm_dsi_host *msm_host)
1167 return msm_gem_get_vaddr(msm_host->tx_gem_obj);
1170 void *dsi_tx_buf_get_v2(struct msm_dsi_host *msm_host)
1172 return msm_host->tx_buf;
1175 void dsi_tx_buf_put_6g(struct msm_dsi_host *msm_host)
1177 msm_gem_put_vaddr(msm_host->tx_gem_obj);
1181 * prepare cmd buffer to be txed
1183 static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1184 const struct mipi_dsi_msg *msg)
1186 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1187 struct mipi_dsi_packet packet;
1192 ret = mipi_dsi_create_packet(&packet, msg);
1194 pr_err("%s: create packet failed, %d\n", __func__, ret);
1197 len = (packet.size + 3) & (~0x3);
1199 if (len > msm_host->tx_size) {
1200 pr_err("%s: packet size is too big\n", __func__);
1204 data = cfg_hnd->ops->tx_buf_get(msm_host);
1206 ret = PTR_ERR(data);
1207 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1211 /* MSM specific command format in memory */
1212 data[0] = packet.header[1];
1213 data[1] = packet.header[2];
1214 data[2] = packet.header[0];
1215 data[3] = BIT(7); /* Last packet */
1216 if (mipi_dsi_packet_format_is_long(msg->type))
1218 if (msg->rx_buf && msg->rx_len)
1222 if (packet.payload && packet.payload_length)
1223 memcpy(data + 4, packet.payload, packet.payload_length);
1225 /* Append 0xff to the end */
1226 if (packet.size < len)
1227 memset(data + packet.size, 0xff, len - packet.size);
1229 if (cfg_hnd->ops->tx_buf_put)
1230 cfg_hnd->ops->tx_buf_put(msm_host);
1236 * dsi_short_read1_resp: 1 parameter
1238 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1240 u8 *data = msg->rx_buf;
1241 if (data && (msg->rx_len >= 1)) {
1242 *data = buf[1]; /* strip out dcs type */
1245 pr_err("%s: read data does not match with rx_buf len %zu\n",
1246 __func__, msg->rx_len);
1252 * dsi_short_read2_resp: 2 parameter
1254 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1256 u8 *data = msg->rx_buf;
1257 if (data && (msg->rx_len >= 2)) {
1258 data[0] = buf[1]; /* strip out dcs type */
1262 pr_err("%s: read data does not match with rx_buf len %zu\n",
1263 __func__, msg->rx_len);
1268 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1270 /* strip out 4 byte dcs header */
1271 if (msg->rx_buf && msg->rx_len)
1272 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1277 int dsi_dma_base_get_6g(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1279 struct drm_device *dev = msm_host->dev;
1280 struct msm_drm_private *priv = dev->dev_private;
1285 return msm_gem_get_and_pin_iova(msm_host->tx_gem_obj,
1286 priv->kms->aspace, dma_base);
1289 int dsi_dma_base_get_v2(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1294 *dma_base = msm_host->tx_buf_paddr;
1298 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1300 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1305 ret = cfg_hnd->ops->dma_base_get(msm_host, &dma_base);
1307 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1311 reinit_completion(&msm_host->dma_comp);
1313 dsi_wait4video_eng_busy(msm_host);
1315 triggered = msm_dsi_manager_cmd_xfer_trigger(
1316 msm_host->id, dma_base, len);
1318 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1319 msecs_to_jiffies(200));
1331 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1332 u8 *buf, int rx_byte, int pkt_size)
1338 int repeated_bytes = 0;
1339 int buf_offset = buf - msm_host->rx_buf;
1342 cnt = (rx_byte + 3) >> 2;
1344 cnt = 4; /* 4 x 32 bits registers only */
1349 read_cnt = pkt_size + 6;
1352 * In case of multiple reads from the panel, after the first read, there
1353 * is possibility that there are some bytes in the payload repeating in
1354 * the RDBK_DATA registers. Since we read all the parameters from the
1355 * panel right from the first byte for every pass. We need to skip the
1356 * repeating bytes and then append the new parameters to the rx buffer.
1358 if (read_cnt > 16) {
1360 /* Any data more than 16 bytes will be shifted out.
1361 * The temp read buffer should already contain these bytes.
1362 * The remaining bytes in read buffer are the repeated bytes.
1364 bytes_shifted = read_cnt - 16;
1365 repeated_bytes = buf_offset - bytes_shifted;
1368 for (i = cnt - 1; i >= 0; i--) {
1369 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1370 *temp++ = ntohl(data); /* to host byte order */
1371 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1374 for (i = repeated_bytes; i < 16; i++)
1380 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1381 const struct mipi_dsi_msg *msg)
1384 int bllp_len = msm_host->mode->hdisplay *
1385 dsi_get_bpp(msm_host->format) / 8;
1387 len = dsi_cmd_dma_add(msm_host, msg);
1389 pr_err("%s: failed to add cmd type = 0x%x\n",
1390 __func__, msg->type);
1394 /* for video mode, do not send cmds more than
1395 * one pixel line, since it only transmit it
1398 /* TODO: if the command is sent in LP mode, the bit rate is only
1399 * half of esc clk rate. In this case, if the video is already
1400 * actively streaming, we need to check more carefully if the
1401 * command can be fit into one BLLP.
1403 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1404 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1409 ret = dsi_cmd_dma_tx(msm_host, len);
1411 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d, ret=%d\n",
1412 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len, ret);
1414 } else if (ret < len) {
1415 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, ret=%d len=%d\n",
1416 __func__, msg->type, (*(u8 *)(msg->tx_buf)), ret, len);
1423 static void dsi_err_worker(struct work_struct *work)
1425 struct msm_dsi_host *msm_host =
1426 container_of(work, struct msm_dsi_host, err_work);
1427 u32 status = msm_host->err_work_state;
1429 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1430 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1431 dsi_sw_reset(msm_host);
1433 /* It is safe to clear here because error irq is disabled. */
1434 msm_host->err_work_state = 0;
1436 /* enable dsi error interrupt */
1437 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1440 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1444 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1447 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1448 /* Writing of an extra 0 needed to clear error bits */
1449 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1450 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1454 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1458 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1461 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1462 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1466 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1470 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1472 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1473 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1474 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1475 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1476 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1477 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1478 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1482 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1486 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1488 /* fifo underflow, overflow */
1490 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1491 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1492 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1493 msm_host->err_work_state |=
1494 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1498 static void dsi_status(struct msm_dsi_host *msm_host)
1502 status = dsi_read(msm_host, REG_DSI_STATUS0);
1504 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1505 dsi_write(msm_host, REG_DSI_STATUS0, status);
1506 msm_host->err_work_state |=
1507 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1511 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1515 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1517 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1518 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1519 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1523 static void dsi_error(struct msm_dsi_host *msm_host)
1525 /* disable dsi error interrupt */
1526 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1528 dsi_clk_status(msm_host);
1529 dsi_fifo_status(msm_host);
1530 dsi_ack_err_status(msm_host);
1531 dsi_timeout_status(msm_host);
1532 dsi_status(msm_host);
1533 dsi_dln0_phy_err(msm_host);
1535 queue_work(msm_host->workqueue, &msm_host->err_work);
1538 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1540 struct msm_dsi_host *msm_host = ptr;
1542 unsigned long flags;
1544 if (!msm_host->ctrl_base)
1547 spin_lock_irqsave(&msm_host->intr_lock, flags);
1548 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1549 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1550 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1552 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1554 if (isr & DSI_IRQ_ERROR)
1555 dsi_error(msm_host);
1557 if (isr & DSI_IRQ_VIDEO_DONE)
1558 complete(&msm_host->video_comp);
1560 if (isr & DSI_IRQ_CMD_DMA_DONE)
1561 complete(&msm_host->dma_comp);
1566 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1567 struct device *panel_device)
1569 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1572 if (IS_ERR(msm_host->disp_en_gpio)) {
1573 DBG("cannot get disp-enable-gpios %ld",
1574 PTR_ERR(msm_host->disp_en_gpio));
1575 return PTR_ERR(msm_host->disp_en_gpio);
1578 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1580 if (IS_ERR(msm_host->te_gpio)) {
1581 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1582 return PTR_ERR(msm_host->te_gpio);
1588 static int dsi_host_attach(struct mipi_dsi_host *host,
1589 struct mipi_dsi_device *dsi)
1591 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1594 if (dsi->lanes > msm_host->num_data_lanes)
1597 msm_host->channel = dsi->channel;
1598 msm_host->lanes = dsi->lanes;
1599 msm_host->format = dsi->format;
1600 msm_host->mode_flags = dsi->mode_flags;
1602 msm_host->dsc = dsi->dsc;
1604 /* Some gpios defined in panel DT need to be controlled by host */
1605 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1609 ret = dsi_dev_attach(msm_host->pdev);
1613 DBG("id=%d", msm_host->id);
1618 static int dsi_host_detach(struct mipi_dsi_host *host,
1619 struct mipi_dsi_device *dsi)
1621 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1623 dsi_dev_detach(msm_host->pdev);
1625 DBG("id=%d", msm_host->id);
1630 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1631 const struct mipi_dsi_msg *msg)
1633 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1636 if (!msg || !msm_host->power_on)
1639 mutex_lock(&msm_host->cmd_mutex);
1640 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1641 mutex_unlock(&msm_host->cmd_mutex);
1646 static const struct mipi_dsi_host_ops dsi_host_ops = {
1647 .attach = dsi_host_attach,
1648 .detach = dsi_host_detach,
1649 .transfer = dsi_host_transfer,
1653 * List of supported physical to logical lane mappings.
1654 * For example, the 2nd entry represents the following mapping:
1656 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1658 static const int supported_data_lane_swaps[][4] = {
1669 static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1670 struct device_node *ep)
1672 struct device *dev = &msm_host->pdev->dev;
1673 struct property *prop;
1675 int ret, i, len, num_lanes;
1677 prop = of_find_property(ep, "data-lanes", &len);
1680 "failed to find data lane mapping, using default\n");
1681 /* Set the number of date lanes to 4 by default. */
1682 msm_host->num_data_lanes = 4;
1686 num_lanes = drm_of_get_data_lanes_count(ep, 1, 4);
1687 if (num_lanes < 0) {
1688 DRM_DEV_ERROR(dev, "bad number of data lanes\n");
1692 msm_host->num_data_lanes = num_lanes;
1694 ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
1697 DRM_DEV_ERROR(dev, "failed to read lane data\n");
1702 * compare DT specified physical-logical lane mappings with the ones
1703 * supported by hardware
1705 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1706 const int *swap = supported_data_lane_swaps[i];
1710 * the data-lanes array we get from DT has a logical->physical
1711 * mapping. The "data lane swap" register field represents
1712 * supported configurations in a physical->logical mapping.
1713 * Translate the DT mapping to what we understand and find a
1714 * configuration that works.
1716 for (j = 0; j < num_lanes; j++) {
1717 if (lane_map[j] < 0 || lane_map[j] > 3)
1718 DRM_DEV_ERROR(dev, "bad physical lane entry %u\n",
1721 if (swap[lane_map[j]] != j)
1725 if (j == num_lanes) {
1726 msm_host->dlane_swap = i;
1734 static u32 dsi_dsc_rc_buf_thresh[DSC_NUM_BUF_RANGES - 1] = {
1735 0x0e, 0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62,
1736 0x69, 0x70, 0x77, 0x79, 0x7b, 0x7d, 0x7e
1739 /* only 8bpc, 8bpp added */
1740 static char min_qp[DSC_NUM_BUF_RANGES] = {
1741 0, 0, 1, 1, 3, 3, 3, 3, 3, 3, 5, 5, 5, 7, 13
1744 static char max_qp[DSC_NUM_BUF_RANGES] = {
1745 4, 4, 5, 6, 7, 7, 7, 8, 9, 10, 11, 12, 13, 13, 15
1748 static char bpg_offset[DSC_NUM_BUF_RANGES] = {
1749 2, 0, 0, -2, -4, -6, -8, -8, -8, -10, -10, -12, -12, -12, -12
1752 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc)
1755 u16 bpp = dsc->bits_per_pixel >> 4;
1757 if (dsc->bits_per_pixel & 0xf) {
1758 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support fractional bits_per_pixel\n");
1762 if (dsc->bits_per_component != 8) {
1763 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support bits_per_component != 8 yet\n");
1767 dsc->rc_model_size = 8192;
1768 dsc->first_line_bpg_offset = 12;
1769 dsc->rc_edge_factor = 6;
1770 dsc->rc_tgt_offset_high = 3;
1771 dsc->rc_tgt_offset_low = 3;
1772 dsc->simple_422 = 0;
1773 dsc->convert_rgb = 1;
1774 dsc->vbr_enable = 0;
1776 /* handle only bpp = bpc = 8 */
1777 for (i = 0; i < DSC_NUM_BUF_RANGES - 1 ; i++)
1778 dsc->rc_buf_thresh[i] = dsi_dsc_rc_buf_thresh[i];
1780 for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
1781 dsc->rc_range_params[i].range_min_qp = min_qp[i];
1782 dsc->rc_range_params[i].range_max_qp = max_qp[i];
1784 * Range BPG Offset contains two's-complement signed values that fill
1785 * 8 bits, yet the registers and DCS PPS field are only 6 bits wide.
1787 dsc->rc_range_params[i].range_bpg_offset = bpg_offset[i] & DSC_RANGE_BPG_OFFSET_MASK;
1790 dsc->initial_offset = 6144; /* Not bpp 12 */
1792 dsc->initial_offset = 2048; /* bpp = 12 */
1794 if (dsc->bits_per_component <= 10)
1795 dsc->mux_word_size = DSC_MUX_WORD_SIZE_8_10_BPC;
1797 dsc->mux_word_size = DSC_MUX_WORD_SIZE_12_BPC;
1799 dsc->initial_xmit_delay = 512;
1800 dsc->initial_scale_value = 32;
1801 dsc->first_line_bpg_offset = 12;
1802 dsc->line_buf_depth = dsc->bits_per_component + 1;
1805 dsc->flatness_min_qp = 3;
1806 dsc->flatness_max_qp = 12;
1807 dsc->rc_quant_incr_limit0 = 11;
1808 dsc->rc_quant_incr_limit1 = 11;
1810 return drm_dsc_compute_rc_parameters(dsc);
1813 static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1815 struct device *dev = &msm_host->pdev->dev;
1816 struct device_node *np = dev->of_node;
1817 struct device_node *endpoint;
1821 * Get the endpoint of the output port of the DSI host. In our case,
1822 * this is mapped to port number with reg = 1. Don't return an error if
1823 * the remote endpoint isn't defined. It's possible that there is
1824 * nothing connected to the dsi output.
1826 endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
1828 DRM_DEV_DEBUG(dev, "%s: no endpoint\n", __func__);
1832 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1834 DRM_DEV_ERROR(dev, "%s: invalid lane configuration %d\n",
1840 if (of_property_read_bool(np, "syscon-sfpb")) {
1841 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1843 if (IS_ERR(msm_host->sfpb)) {
1844 DRM_DEV_ERROR(dev, "%s: failed to get sfpb regmap\n",
1846 ret = PTR_ERR(msm_host->sfpb);
1851 of_node_put(endpoint);
1856 static int dsi_host_get_id(struct msm_dsi_host *msm_host)
1858 struct platform_device *pdev = msm_host->pdev;
1859 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
1860 struct resource *res;
1863 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
1867 for (i = 0; i < VARIANTS_MAX; i++)
1868 for (j = 0; j < DSI_MAX; j++)
1869 if (cfg->io_start[i][j] == res->start)
1875 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1877 struct msm_dsi_host *msm_host = NULL;
1878 struct platform_device *pdev = msm_dsi->pdev;
1879 const struct msm_dsi_config *cfg;
1882 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1887 msm_host->pdev = pdev;
1888 msm_dsi->host = &msm_host->base;
1890 ret = dsi_host_parse_dt(msm_host);
1892 pr_err("%s: failed to parse dt\n", __func__);
1896 msm_host->ctrl_base = msm_ioremap_size(pdev, "dsi_ctrl", &msm_host->ctrl_size);
1897 if (IS_ERR(msm_host->ctrl_base)) {
1898 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1899 return PTR_ERR(msm_host->ctrl_base);
1902 pm_runtime_enable(&pdev->dev);
1904 msm_host->cfg_hnd = dsi_get_config(msm_host);
1905 if (!msm_host->cfg_hnd) {
1906 pr_err("%s: get config failed\n", __func__);
1909 cfg = msm_host->cfg_hnd->cfg;
1911 msm_host->id = dsi_host_get_id(msm_host);
1912 if (msm_host->id < 0) {
1913 pr_err("%s: unable to identify DSI host index\n", __func__);
1914 return msm_host->id;
1917 /* fixup base address by io offset */
1918 msm_host->ctrl_base += cfg->io_offset;
1920 ret = devm_regulator_bulk_get_const(&pdev->dev, cfg->num_regulators,
1921 cfg->regulator_data,
1922 &msm_host->supplies);
1926 ret = dsi_clk_init(msm_host);
1928 pr_err("%s: unable to initialize dsi clks\n", __func__);
1932 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1933 if (!msm_host->rx_buf) {
1934 pr_err("%s: alloc rx temp buf failed\n", __func__);
1938 ret = devm_pm_opp_set_clkname(&pdev->dev, "byte");
1941 /* OPP table is optional */
1942 ret = devm_pm_opp_of_add_table(&pdev->dev);
1943 if (ret && ret != -ENODEV) {
1944 dev_err(&pdev->dev, "invalid OPP table in device tree\n");
1948 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1949 if (msm_host->irq < 0) {
1950 ret = msm_host->irq;
1951 dev_err(&pdev->dev, "failed to get irq: %d\n", ret);
1955 /* do not autoenable, will be enabled later */
1956 ret = devm_request_irq(&pdev->dev, msm_host->irq, dsi_host_irq,
1957 IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
1958 "dsi_isr", msm_host);
1960 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1961 msm_host->irq, ret);
1965 init_completion(&msm_host->dma_comp);
1966 init_completion(&msm_host->video_comp);
1967 mutex_init(&msm_host->dev_mutex);
1968 mutex_init(&msm_host->cmd_mutex);
1969 spin_lock_init(&msm_host->intr_lock);
1971 /* setup workqueue */
1972 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1973 if (!msm_host->workqueue)
1976 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1978 msm_dsi->id = msm_host->id;
1980 DBG("Dsi Host %d initialized", msm_host->id);
1984 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1986 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1989 dsi_tx_buf_free(msm_host);
1990 if (msm_host->workqueue) {
1991 destroy_workqueue(msm_host->workqueue);
1992 msm_host->workqueue = NULL;
1995 mutex_destroy(&msm_host->cmd_mutex);
1996 mutex_destroy(&msm_host->dev_mutex);
1998 pm_runtime_disable(&msm_host->pdev->dev);
2001 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
2002 struct drm_device *dev)
2004 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2005 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2008 msm_host->dev = dev;
2010 ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
2012 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
2019 int msm_dsi_host_register(struct mipi_dsi_host *host)
2021 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2024 /* Register mipi dsi host */
2025 if (!msm_host->registered) {
2026 host->dev = &msm_host->pdev->dev;
2027 host->ops = &dsi_host_ops;
2028 ret = mipi_dsi_host_register(host);
2032 msm_host->registered = true;
2038 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
2040 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2042 if (msm_host->registered) {
2043 mipi_dsi_host_unregister(host);
2046 msm_host->registered = false;
2050 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
2051 const struct mipi_dsi_msg *msg)
2053 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2054 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2056 /* TODO: make sure dsi_cmd_mdp is idle.
2057 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
2058 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
2059 * How to handle the old versions? Wait for mdp cmd done?
2063 * mdss interrupt is generated in mdp core clock domain
2064 * mdp clock need to be enabled to receive dsi interrupt
2066 pm_runtime_get_sync(&msm_host->pdev->dev);
2067 cfg_hnd->ops->link_clk_set_rate(msm_host);
2068 cfg_hnd->ops->link_clk_enable(msm_host);
2070 /* TODO: vote for bus bandwidth */
2072 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2073 dsi_set_tx_power_mode(0, msm_host);
2075 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
2076 dsi_write(msm_host, REG_DSI_CTRL,
2077 msm_host->dma_cmd_ctrl_restore |
2078 DSI_CTRL_CMD_MODE_EN |
2080 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
2085 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
2086 const struct mipi_dsi_msg *msg)
2088 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2089 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2091 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
2092 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
2094 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2095 dsi_set_tx_power_mode(1, msm_host);
2097 /* TODO: unvote for bus bandwidth */
2099 cfg_hnd->ops->link_clk_disable(msm_host);
2100 pm_runtime_put(&msm_host->pdev->dev);
2103 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
2104 const struct mipi_dsi_msg *msg)
2106 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2108 return dsi_cmds2buf_tx(msm_host, msg);
2111 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
2112 const struct mipi_dsi_msg *msg)
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 int data_byte, rx_byte, dlen, end;
2117 int short_response, diff, pkt_size, ret = 0;
2119 int rlen = msg->rx_len;
2128 data_byte = 10; /* first read */
2129 if (rlen < data_byte)
2132 pkt_size = data_byte;
2133 rx_byte = data_byte + 6; /* 4 header + 2 crc */
2136 buf = msm_host->rx_buf;
2139 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
2140 struct mipi_dsi_msg max_pkt_size_msg = {
2141 .channel = msg->channel,
2142 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
2147 DBG("rlen=%d pkt_size=%d rx_byte=%d",
2148 rlen, pkt_size, rx_byte);
2150 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
2152 pr_err("%s: Set max pkt size failed, %d\n",
2157 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
2158 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
2159 /* Clear the RDBK_DATA registers */
2160 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
2161 DSI_RDBK_DATA_CTRL_CLR);
2162 wmb(); /* make sure the RDBK registers are cleared */
2163 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
2164 wmb(); /* release cleared status before transfer */
2167 ret = dsi_cmds2buf_tx(msm_host, msg);
2169 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
2171 } else if (ret < msg->tx_len) {
2172 pr_err("%s: Read cmd Tx failed, too short: %d\n", __func__, ret);
2177 * once cmd_dma_done interrupt received,
2178 * return data from client is ready and stored
2179 * at RDBK_DATA register already
2180 * since rx fifo is 16 bytes, dcs header is kept at first loop,
2181 * after that dcs header lost during shift into registers
2183 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
2191 if (rlen <= data_byte) {
2192 diff = data_byte - rlen;
2200 dlen -= 2; /* 2 crc */
2202 buf += dlen; /* next start position */
2203 data_byte = 14; /* NOT first read */
2204 if (rlen < data_byte)
2207 pkt_size += data_byte;
2208 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
2213 * For single Long read, if the requested rlen < 10,
2214 * we need to shift the start position of rx
2215 * data buffer to skip the bytes which are not
2218 if (pkt_size < 10 && !short_response)
2219 buf = msm_host->rx_buf + (10 - rlen);
2221 buf = msm_host->rx_buf;
2225 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2226 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2229 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2230 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2231 ret = dsi_short_read1_resp(buf, msg);
2233 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2234 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2235 ret = dsi_short_read2_resp(buf, msg);
2237 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2238 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2239 ret = dsi_long_read_resp(buf, msg);
2242 pr_warn("%s:Invalid response cmd\n", __func__);
2249 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2252 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2254 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2255 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2256 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2258 /* Make sure trigger happens */
2262 void msm_dsi_host_set_phy_mode(struct mipi_dsi_host *host,
2263 struct msm_dsi_phy *src_phy)
2265 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2267 msm_host->cphy_mode = src_phy->cphy_mode;
2270 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
2272 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2275 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
2276 /* Make sure fully reset */
2279 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
2283 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
2284 struct msm_dsi_phy_clk_request *clk_req,
2287 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2288 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2291 ret = cfg_hnd->ops->calc_clk_rate(msm_host, is_bonded_dsi);
2293 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2297 /* CPHY transmits 16 bits over 7 clock cycles
2298 * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
2299 * so multiply by 7 to get the "bitclk rate"
2301 if (msm_host->cphy_mode)
2302 clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
2304 clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
2305 clk_req->escclk_rate = msm_host->esc_clk_rate;
2308 void msm_dsi_host_enable_irq(struct mipi_dsi_host *host)
2310 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2312 enable_irq(msm_host->irq);
2315 void msm_dsi_host_disable_irq(struct mipi_dsi_host *host)
2317 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2319 disable_irq(msm_host->irq);
2322 int msm_dsi_host_enable(struct mipi_dsi_host *host)
2324 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2326 dsi_op_mode_config(msm_host,
2327 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2329 /* TODO: clock should be turned off for command mode,
2330 * and only turned on before MDP START.
2331 * This part of code should be enabled once mdp driver support it.
2333 /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
2334 * dsi_link_clk_disable(msm_host);
2335 * pm_runtime_put(&msm_host->pdev->dev);
2338 msm_host->enabled = true;
2342 int msm_dsi_host_disable(struct mipi_dsi_host *host)
2344 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2346 msm_host->enabled = false;
2347 dsi_op_mode_config(msm_host,
2348 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2350 /* Since we have disabled INTF, the video engine won't stop so that
2351 * the cmd engine will be blocked.
2352 * Reset to disable video engine so that we can send off cmd.
2354 dsi_sw_reset(msm_host);
2359 static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2361 enum sfpb_ahb_arb_master_port_en en;
2363 if (!msm_host->sfpb)
2366 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2368 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2369 SFPB_GPREG_MASTER_PORT_EN__MASK,
2370 SFPB_GPREG_MASTER_PORT_EN(en));
2373 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
2374 struct msm_dsi_phy_shared_timings *phy_shared_timings,
2375 bool is_bonded_dsi, struct msm_dsi_phy *phy)
2377 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2378 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2381 mutex_lock(&msm_host->dev_mutex);
2382 if (msm_host->power_on) {
2383 DBG("dsi host already on");
2387 msm_host->byte_intf_clk_rate = msm_host->byte_clk_rate;
2388 if (phy_shared_timings->byte_intf_clk_div_2)
2389 msm_host->byte_intf_clk_rate /= 2;
2391 msm_dsi_sfpb_config(msm_host, true);
2393 ret = regulator_bulk_enable(msm_host->cfg_hnd->cfg->num_regulators,
2394 msm_host->supplies);
2396 pr_err("%s:Failed to enable vregs.ret=%d\n",
2401 pm_runtime_get_sync(&msm_host->pdev->dev);
2402 ret = cfg_hnd->ops->link_clk_set_rate(msm_host);
2404 ret = cfg_hnd->ops->link_clk_enable(msm_host);
2406 pr_err("%s: failed to enable link clocks. ret=%d\n",
2408 goto fail_disable_reg;
2411 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2413 pr_err("%s: failed to set pinctrl default state, %d\n",
2415 goto fail_disable_clk;
2418 dsi_timing_setup(msm_host, is_bonded_dsi);
2419 dsi_sw_reset(msm_host);
2420 dsi_ctrl_config(msm_host, true, phy_shared_timings, phy);
2422 if (msm_host->disp_en_gpio)
2423 gpiod_set_value(msm_host->disp_en_gpio, 1);
2425 msm_host->power_on = true;
2426 mutex_unlock(&msm_host->dev_mutex);
2431 cfg_hnd->ops->link_clk_disable(msm_host);
2432 pm_runtime_put(&msm_host->pdev->dev);
2434 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2435 msm_host->supplies);
2437 mutex_unlock(&msm_host->dev_mutex);
2441 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2443 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2444 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2446 mutex_lock(&msm_host->dev_mutex);
2447 if (!msm_host->power_on) {
2448 DBG("dsi host already off");
2452 dsi_ctrl_config(msm_host, false, NULL, NULL);
2454 if (msm_host->disp_en_gpio)
2455 gpiod_set_value(msm_host->disp_en_gpio, 0);
2457 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2459 cfg_hnd->ops->link_clk_disable(msm_host);
2460 pm_runtime_put(&msm_host->pdev->dev);
2462 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2463 msm_host->supplies);
2465 msm_dsi_sfpb_config(msm_host, false);
2469 msm_host->power_on = false;
2472 mutex_unlock(&msm_host->dev_mutex);
2476 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2477 const struct drm_display_mode *mode)
2479 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2481 if (msm_host->mode) {
2482 drm_mode_destroy(msm_host->dev, msm_host->mode);
2483 msm_host->mode = NULL;
2486 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2487 if (!msm_host->mode) {
2488 pr_err("%s: cannot duplicate mode\n", __func__);
2495 enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
2496 const struct drm_display_mode *mode)
2498 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2499 struct drm_dsc_config *dsc = msm_host->dsc;
2500 int pic_width = mode->hdisplay;
2501 int pic_height = mode->vdisplay;
2506 if (pic_width % dsc->slice_width) {
2507 pr_err("DSI: pic_width %d has to be multiple of slice %d\n",
2508 pic_width, dsc->slice_width);
2509 return MODE_H_ILLEGAL;
2512 if (pic_height % dsc->slice_height) {
2513 pr_err("DSI: pic_height %d has to be multiple of slice %d\n",
2514 pic_height, dsc->slice_height);
2515 return MODE_V_ILLEGAL;
2521 unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
2523 return to_msm_dsi_host(host)->mode_flags;
2526 void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
2528 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2530 pm_runtime_get_sync(&msm_host->pdev->dev);
2532 msm_disp_snapshot_add_block(disp_state, msm_host->ctrl_size,
2533 msm_host->ctrl_base, "dsi%d_ctrl", msm_host->id);
2535 pm_runtime_put_sync(&msm_host->pdev->dev);
2538 static void msm_dsi_host_video_test_pattern_setup(struct msm_dsi_host *msm_host)
2542 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2544 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_VIDEO_INIT_VAL, 0xff);
2545 /* draw checkered rectangle pattern */
2546 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL,
2547 DSI_TPG_MAIN_CONTROL_CHECKERED_RECTANGLE_PATTERN);
2548 /* use 24-bit RGB test pttern */
2549 dsi_write(msm_host, REG_DSI_TPG_VIDEO_CONFIG,
2550 DSI_TPG_VIDEO_CONFIG_BPP(VIDEO_CONFIG_24BPP) |
2551 DSI_TPG_VIDEO_CONFIG_RGB);
2553 reg |= DSI_TEST_PATTERN_GEN_CTRL_VIDEO_PATTERN_SEL(VID_MDSS_GENERAL_PATTERN);
2554 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2556 DBG("Video test pattern setup done\n");
2559 static void msm_dsi_host_cmd_test_pattern_setup(struct msm_dsi_host *msm_host)
2563 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2565 /* initial value for test pattern */
2566 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_MDP_INIT_VAL0, 0xff);
2568 reg |= DSI_TEST_PATTERN_GEN_CTRL_CMD_MDP_STREAM0_PATTERN_SEL(CMD_MDP_MDSS_GENERAL_PATTERN);
2570 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2571 /* draw checkered rectangle pattern */
2572 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL2,
2573 DSI_TPG_MAIN_CONTROL2_CMD_MDP0_CHECKERED_RECTANGLE_PATTERN);
2575 DBG("Cmd test pattern setup done\n");
2578 void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host)
2580 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2581 bool is_video_mode = !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO);
2585 msm_dsi_host_video_test_pattern_setup(msm_host);
2587 msm_dsi_host_cmd_test_pattern_setup(msm_host);
2589 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2590 /* enable the test pattern generator */
2591 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, (reg | DSI_TEST_PATTERN_GEN_CTRL_EN));
2593 /* for command mode need to trigger one frame from tpg */
2595 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER,
2596 DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER_SW_TRIGGER);
2599 struct drm_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host)
2601 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2603 return msm_host->dsc;