1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
7 #include <linux/delay.h>
8 #include <linux/dma-mapping.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/interrupt.h>
12 #include <linux/mfd/syscon.h>
14 #include <linux/of_graph.h>
15 #include <linux/of_irq.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_opp.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/consumer.h>
20 #include <linux/spinlock.h>
22 #include <video/mipi_display.h>
24 #include <drm/display/drm_dsc_helper.h>
25 #include <drm/drm_of.h>
31 #include "msm_dsc_helper.h"
34 #include "phy/dsi_phy.h"
36 #define DSI_RESET_TOGGLE_DELAY_MS 20
38 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc);
40 static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
48 * From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
49 * makes all other registers 4-byte shifted down.
51 * In order to identify between DSI6G(v3) and beyond, and DSIv2 and
52 * older, we read the DSI_VERSION register without any shift(offset
53 * 0x1f0). In the case of DSIv2, this hast to be a non-zero value. In
54 * the case of DSI6G, this has to be zero (the offset points to a
55 * scratch register which we never touch)
58 ver = msm_readl(base + REG_DSI_VERSION);
60 /* older dsi host, there is no register shift */
61 ver = FIELD(ver, DSI_VERSION_MAJOR);
62 if (ver <= MSM_DSI_VER_MAJOR_V2) {
72 * newer host, offset 0 has 6G_HW_VERSION, the rest of the
73 * registers are shifted down, read DSI_VERSION again with
76 ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
77 ver = FIELD(ver, DSI_VERSION_MAJOR);
78 if (ver == MSM_DSI_VER_MAJOR_6G) {
81 *minor = msm_readl(base + REG_DSI_6G_HW_VERSION);
89 #define DSI_ERR_STATE_ACK 0x0000
90 #define DSI_ERR_STATE_TIMEOUT 0x0001
91 #define DSI_ERR_STATE_DLN0_PHY 0x0002
92 #define DSI_ERR_STATE_FIFO 0x0004
93 #define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
94 #define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
95 #define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
97 #define DSI_CLK_CTRL_ENABLE_CLKS \
98 (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
99 DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
100 DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
101 DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
103 struct msm_dsi_host {
104 struct mipi_dsi_host base;
106 struct platform_device *pdev;
107 struct drm_device *dev;
111 void __iomem *ctrl_base;
112 phys_addr_t ctrl_size;
113 struct regulator_bulk_data *supplies;
116 struct clk_bulk_data bus_clks[DSI_BUS_CLK_MAX];
118 struct clk *byte_clk;
120 struct clk *pixel_clk;
121 struct clk *byte_intf_clk;
123 unsigned long byte_clk_rate;
124 unsigned long byte_intf_clk_rate;
125 unsigned long pixel_clk_rate;
126 unsigned long esc_clk_rate;
128 /* DSI v2 specific clocks */
131 unsigned long src_clk_rate;
133 struct gpio_desc *disp_en_gpio;
134 struct gpio_desc *te_gpio;
136 const struct msm_dsi_cfg_handler *cfg_hnd;
138 struct completion dma_comp;
139 struct completion video_comp;
140 struct mutex dev_mutex;
141 struct mutex cmd_mutex;
142 spinlock_t intr_lock; /* Protect interrupt ctrl register */
145 struct work_struct err_work;
146 struct workqueue_struct *workqueue;
148 /* DSI 6G TX buffer*/
149 struct drm_gem_object *tx_gem_obj;
150 struct msm_gem_address_space *aspace;
152 /* DSI v2 TX buffer */
154 dma_addr_t tx_buf_paddr;
162 struct drm_display_mode *mode;
163 struct drm_dsc_config *dsc;
165 /* connected device info */
166 unsigned int channel;
168 enum mipi_dsi_pixel_format format;
169 unsigned long mode_flags;
171 /* lane data parsed via DT */
178 u32 dma_cmd_ctrl_restore;
186 static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
189 case MIPI_DSI_FMT_RGB565: return 16;
190 case MIPI_DSI_FMT_RGB666_PACKED: return 18;
191 case MIPI_DSI_FMT_RGB666:
192 case MIPI_DSI_FMT_RGB888:
197 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
199 return msm_readl(msm_host->ctrl_base + reg);
201 static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
203 msm_writel(data, msm_host->ctrl_base + reg);
206 static const struct msm_dsi_cfg_handler *dsi_get_config(
207 struct msm_dsi_host *msm_host)
209 const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
210 struct device *dev = &msm_host->pdev->dev;
213 u32 major = 0, minor = 0;
215 ahb_clk = msm_clk_get(msm_host->pdev, "iface");
216 if (IS_ERR(ahb_clk)) {
217 pr_err("%s: cannot get interface clock\n", __func__);
221 pm_runtime_get_sync(dev);
223 ret = clk_prepare_enable(ahb_clk);
225 pr_err("%s: unable to enable ahb_clk\n", __func__);
229 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
231 pr_err("%s: Invalid version\n", __func__);
235 cfg_hnd = msm_dsi_cfg_get(major, minor);
237 DBG("%s: Version %x:%x\n", __func__, major, minor);
240 clk_disable_unprepare(ahb_clk);
242 pm_runtime_put_sync(dev);
247 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
249 return container_of(host, struct msm_dsi_host, base);
252 int dsi_clk_init_v2(struct msm_dsi_host *msm_host)
254 struct platform_device *pdev = msm_host->pdev;
257 msm_host->src_clk = msm_clk_get(pdev, "src");
259 if (IS_ERR(msm_host->src_clk)) {
260 ret = PTR_ERR(msm_host->src_clk);
261 pr_err("%s: can't find src clock. ret=%d\n",
263 msm_host->src_clk = NULL;
270 int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host)
272 struct platform_device *pdev = msm_host->pdev;
275 msm_host->byte_intf_clk = msm_clk_get(pdev, "byte_intf");
276 if (IS_ERR(msm_host->byte_intf_clk)) {
277 ret = PTR_ERR(msm_host->byte_intf_clk);
278 pr_err("%s: can't find byte_intf clock. ret=%d\n",
285 static int dsi_clk_init(struct msm_dsi_host *msm_host)
287 struct platform_device *pdev = msm_host->pdev;
288 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
289 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
293 for (i = 0; i < cfg->num_bus_clks; i++)
294 msm_host->bus_clks[i].id = cfg->bus_clk_names[i];
295 msm_host->num_bus_clks = cfg->num_bus_clks;
297 ret = devm_clk_bulk_get(&pdev->dev, msm_host->num_bus_clks, msm_host->bus_clks);
299 dev_err(&pdev->dev, "Unable to get clocks, ret = %d\n", ret);
303 /* get link and source clocks */
304 msm_host->byte_clk = msm_clk_get(pdev, "byte");
305 if (IS_ERR(msm_host->byte_clk)) {
306 ret = PTR_ERR(msm_host->byte_clk);
307 pr_err("%s: can't find dsi_byte clock. ret=%d\n",
309 msm_host->byte_clk = NULL;
313 msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
314 if (IS_ERR(msm_host->pixel_clk)) {
315 ret = PTR_ERR(msm_host->pixel_clk);
316 pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
318 msm_host->pixel_clk = NULL;
322 msm_host->esc_clk = msm_clk_get(pdev, "core");
323 if (IS_ERR(msm_host->esc_clk)) {
324 ret = PTR_ERR(msm_host->esc_clk);
325 pr_err("%s: can't find dsi_esc clock. ret=%d\n",
327 msm_host->esc_clk = NULL;
331 if (cfg_hnd->ops->clk_init_ver)
332 ret = cfg_hnd->ops->clk_init_ver(msm_host);
337 int msm_dsi_runtime_suspend(struct device *dev)
339 struct platform_device *pdev = to_platform_device(dev);
340 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
341 struct mipi_dsi_host *host = msm_dsi->host;
342 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
344 if (!msm_host->cfg_hnd)
347 clk_bulk_disable_unprepare(msm_host->num_bus_clks, msm_host->bus_clks);
352 int msm_dsi_runtime_resume(struct device *dev)
354 struct platform_device *pdev = to_platform_device(dev);
355 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
356 struct mipi_dsi_host *host = msm_dsi->host;
357 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
359 if (!msm_host->cfg_hnd)
362 return clk_bulk_prepare_enable(msm_host->num_bus_clks, msm_host->bus_clks);
365 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
369 DBG("Set clk rates: pclk=%d, byteclk=%lu",
370 msm_host->mode->clock, msm_host->byte_clk_rate);
372 ret = dev_pm_opp_set_rate(&msm_host->pdev->dev,
373 msm_host->byte_clk_rate);
375 pr_err("%s: dev_pm_opp_set_rate failed %d\n", __func__, ret);
379 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
381 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
385 if (msm_host->byte_intf_clk) {
386 ret = clk_set_rate(msm_host->byte_intf_clk, msm_host->byte_intf_clk_rate);
388 pr_err("%s: Failed to set rate byte intf clk, %d\n",
398 int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
402 ret = clk_prepare_enable(msm_host->esc_clk);
404 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
408 ret = clk_prepare_enable(msm_host->byte_clk);
410 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
414 ret = clk_prepare_enable(msm_host->pixel_clk);
416 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
420 ret = clk_prepare_enable(msm_host->byte_intf_clk);
422 pr_err("%s: Failed to enable byte intf clk\n",
424 goto byte_intf_clk_err;
430 clk_disable_unprepare(msm_host->pixel_clk);
432 clk_disable_unprepare(msm_host->byte_clk);
434 clk_disable_unprepare(msm_host->esc_clk);
439 int dsi_link_clk_set_rate_v2(struct msm_dsi_host *msm_host)
443 DBG("Set clk rates: pclk=%d, byteclk=%lu, esc_clk=%lu, dsi_src_clk=%lu",
444 msm_host->mode->clock, msm_host->byte_clk_rate,
445 msm_host->esc_clk_rate, msm_host->src_clk_rate);
447 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
449 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
453 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
455 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
459 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
461 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
465 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
467 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
474 int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
478 ret = clk_prepare_enable(msm_host->byte_clk);
480 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
484 ret = clk_prepare_enable(msm_host->esc_clk);
486 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
490 ret = clk_prepare_enable(msm_host->src_clk);
492 pr_err("%s: Failed to enable dsi src clk\n", __func__);
496 ret = clk_prepare_enable(msm_host->pixel_clk);
498 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
505 clk_disable_unprepare(msm_host->src_clk);
507 clk_disable_unprepare(msm_host->esc_clk);
509 clk_disable_unprepare(msm_host->byte_clk);
514 void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host)
516 /* Drop the performance state vote */
517 dev_pm_opp_set_rate(&msm_host->pdev->dev, 0);
518 clk_disable_unprepare(msm_host->esc_clk);
519 clk_disable_unprepare(msm_host->pixel_clk);
520 clk_disable_unprepare(msm_host->byte_intf_clk);
521 clk_disable_unprepare(msm_host->byte_clk);
524 void dsi_link_clk_disable_v2(struct msm_dsi_host *msm_host)
526 clk_disable_unprepare(msm_host->pixel_clk);
527 clk_disable_unprepare(msm_host->src_clk);
528 clk_disable_unprepare(msm_host->esc_clk);
529 clk_disable_unprepare(msm_host->byte_clk);
532 static unsigned long dsi_adjust_pclk_for_compression(const struct drm_display_mode *mode,
533 const struct drm_dsc_config *dsc)
535 int new_hdisplay = DIV_ROUND_UP(mode->hdisplay * drm_dsc_get_bpp_int(dsc),
536 dsc->bits_per_component * 3);
538 int new_htotal = mode->htotal - mode->hdisplay + new_hdisplay;
540 return new_htotal * mode->vtotal * drm_mode_vrefresh(mode);
543 static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode,
544 const struct drm_dsc_config *dsc, bool is_bonded_dsi)
546 unsigned long pclk_rate;
548 pclk_rate = mode->clock * 1000;
551 pclk_rate = dsi_adjust_pclk_for_compression(mode, dsc);
554 * For bonded DSI mode, the current DRM mode has the complete width of the
555 * panel. Since, the complete panel is driven by two DSI controllers,
556 * the clock rates have to be split between the two dsi controllers.
557 * Adjust the byte and pixel clock rates for each dsi host accordingly.
565 unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_dsi,
566 const struct drm_display_mode *mode)
568 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
569 u8 lanes = msm_host->lanes;
570 u32 bpp = dsi_get_bpp(msm_host->format);
571 unsigned long pclk_rate = dsi_get_pclk_rate(mode, msm_host->dsc, is_bonded_dsi);
572 unsigned long pclk_bpp;
575 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
579 /* CPHY "byte_clk" is in units of 16 bits */
580 if (msm_host->cphy_mode)
581 pclk_bpp = mult_frac(pclk_rate, bpp, 16 * lanes);
583 pclk_bpp = mult_frac(pclk_rate, bpp, 8 * lanes);
588 static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
590 msm_host->pixel_clk_rate = dsi_get_pclk_rate(msm_host->mode, msm_host->dsc, is_bonded_dsi);
591 msm_host->byte_clk_rate = dsi_byte_clk_get_rate(&msm_host->base, is_bonded_dsi,
594 DBG("pclk=%lu, bclk=%lu", msm_host->pixel_clk_rate,
595 msm_host->byte_clk_rate);
599 int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
601 if (!msm_host->mode) {
602 pr_err("%s: mode not set\n", __func__);
606 dsi_calc_pclk(msm_host, is_bonded_dsi);
607 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
611 int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
613 u32 bpp = dsi_get_bpp(msm_host->format);
614 unsigned int esc_mhz, esc_div;
615 unsigned long byte_mhz;
617 dsi_calc_pclk(msm_host, is_bonded_dsi);
619 msm_host->src_clk_rate = mult_frac(msm_host->pixel_clk_rate, bpp, 8);
622 * esc clock is byte clock followed by a 4 bit divider,
623 * we need to find an escape clock frequency within the
624 * mipi DSI spec range within the maximum divider limit
625 * We iterate here between an escape clock frequencey
626 * between 20 Mhz to 5 Mhz and pick up the first one
627 * that can be supported by our divider
630 byte_mhz = msm_host->byte_clk_rate / 1000000;
632 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
633 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
636 * TODO: Ideally, we shouldn't know what sort of divider
637 * is available in mmss_cc, we're just assuming that
638 * it'll always be a 4 bit divider. Need to come up with
641 if (esc_div >= 1 && esc_div <= 16)
648 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
650 DBG("esc=%lu, src=%lu", msm_host->esc_clk_rate,
651 msm_host->src_clk_rate);
656 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
661 spin_lock_irqsave(&msm_host->intr_lock, flags);
662 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
669 DBG("intr=%x enable=%d", intr, enable);
671 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
672 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
675 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
677 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
679 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
680 return NON_BURST_SYNCH_PULSE;
682 return NON_BURST_SYNCH_EVENT;
685 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
686 const enum mipi_dsi_pixel_format mipi_fmt)
689 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
690 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
691 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
692 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
693 default: return VID_DST_FORMAT_RGB888;
697 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
698 const enum mipi_dsi_pixel_format mipi_fmt)
701 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
702 case MIPI_DSI_FMT_RGB666_PACKED:
703 case MIPI_DSI_FMT_RGB666: return CMD_DST_FORMAT_RGB666;
704 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
705 default: return CMD_DST_FORMAT_RGB888;
709 static void dsi_ctrl_disable(struct msm_dsi_host *msm_host)
711 dsi_write(msm_host, REG_DSI_CTRL, 0);
714 bool msm_dsi_host_is_wide_bus_enabled(struct mipi_dsi_host *host)
716 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
718 return msm_host->dsc &&
719 (msm_host->cfg_hnd->major == MSM_DSI_VER_MAJOR_6G &&
720 msm_host->cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V2_5_0);
723 static void dsi_ctrl_enable(struct msm_dsi_host *msm_host,
724 struct msm_dsi_phy_shared_timings *phy_shared_timings, struct msm_dsi_phy *phy)
726 u32 flags = msm_host->mode_flags;
727 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
728 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
729 u32 data = 0, lane_ctrl = 0;
731 if (flags & MIPI_DSI_MODE_VIDEO) {
732 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
733 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
734 if (flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
735 data |= DSI_VID_CFG0_HFP_POWER_STOP;
736 if (flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
737 data |= DSI_VID_CFG0_HBP_POWER_STOP;
738 if (flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
739 data |= DSI_VID_CFG0_HSA_POWER_STOP;
740 /* Always set low power stop mode for BLLP
741 * to let command engine send packets
743 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
744 DSI_VID_CFG0_BLLP_POWER_STOP;
745 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
746 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
747 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
748 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
750 /* Do not swap RGB colors */
751 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
752 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
754 /* Do not swap RGB colors */
755 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
756 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
757 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
759 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
760 DSI_CMD_CFG1_WR_MEM_CONTINUE(
761 MIPI_DCS_WRITE_MEMORY_CONTINUE);
762 /* Always insert DCS command */
763 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
764 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
766 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
767 data = dsi_read(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2);
769 if (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_3)
770 data |= DSI_CMD_MODE_MDP_CTRL2_BURST_MODE;
772 /* TODO: Allow for video-mode support once tested/fixed */
773 if (msm_dsi_host_is_wide_bus_enabled(&msm_host->base))
774 data |= DSI_CMD_MODE_MDP_CTRL2_DATABUS_WIDEN;
776 dsi_write(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2, data);
780 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
781 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
782 DSI_CMD_DMA_CTRL_LOW_POWER);
785 /* Always assume dedicated TE pin */
786 data |= DSI_TRIG_CTRL_TE;
787 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
788 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
789 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
790 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
791 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
792 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
793 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
795 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(phy_shared_timings->clk_post) |
796 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(phy_shared_timings->clk_pre);
797 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
799 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
800 (cfg_hnd->minor > MSM_DSI_6G_VER_MINOR_V1_0) &&
801 phy_shared_timings->clk_pre_inc_by_2)
802 dsi_write(msm_host, REG_DSI_T_CLK_PRE_EXTEND,
803 DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK);
806 if (!(flags & MIPI_DSI_MODE_NO_EOT_PACKET))
807 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
808 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
810 /* allow only ack-err-status to generate interrupt */
811 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
813 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
815 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
817 data = DSI_CTRL_CLK_EN;
819 DBG("lane number=%d", msm_host->lanes);
820 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
822 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
823 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
825 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) {
826 lane_ctrl = dsi_read(msm_host, REG_DSI_LANE_CTRL);
828 if (msm_dsi_phy_set_continuous_clock(phy, true))
829 lane_ctrl &= ~DSI_LANE_CTRL_HS_REQ_SEL_PHY;
831 dsi_write(msm_host, REG_DSI_LANE_CTRL,
832 lane_ctrl | DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
835 data |= DSI_CTRL_ENABLE;
837 dsi_write(msm_host, REG_DSI_CTRL, data);
839 if (msm_host->cphy_mode)
840 dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
843 static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mode, u32 hdisplay)
845 struct drm_dsc_config *dsc = msm_host->dsc;
846 u32 reg, reg_ctrl, reg_ctrl2;
847 u32 slice_per_intf, total_bytes_per_intf;
851 /* first calculate dsc parameters and then program
852 * compress mode registers
854 slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
856 total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
858 eol_byte_num = total_bytes_per_intf % 3;
861 * Typically, pkt_per_line = slice_per_intf * slice_per_pkt.
863 * Since the current driver only supports slice_per_pkt = 1,
864 * pkt_per_line will be equal to slice per intf for now.
866 pkt_per_line = slice_per_intf;
868 if (is_cmd_mode) /* packet data type */
869 reg = DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_LONG_WRITE);
871 reg = DSI_VIDEO_COMPRESSION_MODE_CTRL_DATATYPE(MIPI_DSI_COMPRESSED_PIXEL_STREAM);
873 /* DSI_VIDEO_COMPRESSION_MODE & DSI_COMMAND_COMPRESSION_MODE
874 * registers have similar offsets, so for below common code use
875 * DSI_VIDEO_COMPRESSION_MODE_XXXX for setting bits
877 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_PKT_PER_LINE(pkt_per_line >> 1);
878 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EOL_BYTE_NUM(eol_byte_num);
879 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EN;
882 reg_ctrl = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL);
883 reg_ctrl2 = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2);
888 reg_ctrl2 &= ~DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH__MASK;
889 reg_ctrl2 |= DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH(dsc->slice_chunk_size);
891 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
892 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
894 dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
898 static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
900 struct drm_display_mode *mode = msm_host->mode;
901 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
902 u32 h_total = mode->htotal;
903 u32 v_total = mode->vtotal;
904 u32 hs_end = mode->hsync_end - mode->hsync_start;
905 u32 vs_end = mode->vsync_end - mode->vsync_start;
906 u32 ha_start = h_total - mode->hsync_start;
907 u32 ha_end = ha_start + mode->hdisplay;
908 u32 va_start = v_total - mode->vsync_start;
909 u32 va_end = va_start + mode->vdisplay;
910 u32 hdisplay = mode->hdisplay;
913 bool wide_bus_enabled = msm_dsi_host_is_wide_bus_enabled(&msm_host->base);
918 * For bonded DSI mode, the current DRM mode has
919 * the complete width of the panel. Since, the complete
920 * panel is driven by two DSI controllers, the horizontal
921 * timings have to be split between the two dsi controllers.
922 * Adjust the DSI host timing values accordingly.
933 struct drm_dsc_config *dsc = msm_host->dsc;
936 /* update dsc params with timing params */
937 if (!dsc || !mode->hdisplay || !mode->vdisplay) {
938 pr_err("DSI: invalid input: pic_width: %d pic_height: %d\n",
939 mode->hdisplay, mode->vdisplay);
943 dsc->pic_width = mode->hdisplay;
944 dsc->pic_height = mode->vdisplay;
945 DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);
947 /* we do the calculations for dsc parameters here so that
948 * panel can use these parameters
950 ret = dsi_populate_dsc_params(msm_host, dsc);
954 /* Divide the display by 3 but keep back/font porch and
958 if (wide_bus_enabled && !(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
963 hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), bytes_per_pclk);
966 ha_end = ha_start + hdisplay;
969 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
971 dsi_update_dsc_timing(msm_host, false, mode->hdisplay);
973 dsi_write(msm_host, REG_DSI_ACTIVE_H,
974 DSI_ACTIVE_H_START(ha_start) |
975 DSI_ACTIVE_H_END(ha_end));
976 dsi_write(msm_host, REG_DSI_ACTIVE_V,
977 DSI_ACTIVE_V_START(va_start) |
978 DSI_ACTIVE_V_END(va_end));
979 dsi_write(msm_host, REG_DSI_TOTAL,
980 DSI_TOTAL_H_TOTAL(h_total - 1) |
981 DSI_TOTAL_V_TOTAL(v_total - 1));
983 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
984 DSI_ACTIVE_HSYNC_START(hs_start) |
985 DSI_ACTIVE_HSYNC_END(hs_end));
986 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
987 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
988 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
989 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
990 } else { /* command mode */
992 dsi_update_dsc_timing(msm_host, true, mode->hdisplay);
994 /* image data and 1 byte write_memory_start cmd */
996 wc = hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
999 * When DSC is enabled, WC = slice_chunk_size * slice_per_pkt + 1.
1000 * Currently, the driver only supports default value of slice_per_pkt = 1
1002 * TODO: Expand mipi_dsi_device struct to hold slice_per_pkt info
1003 * and adjust DSC math to account for slice_per_pkt.
1005 wc = msm_host->dsc->slice_chunk_size + 1;
1007 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_CTRL,
1008 DSI_CMD_MDP_STREAM0_CTRL_WORD_COUNT(wc) |
1009 DSI_CMD_MDP_STREAM0_CTRL_VIRTUAL_CHANNEL(
1010 msm_host->channel) |
1011 DSI_CMD_MDP_STREAM0_CTRL_DATA_TYPE(
1012 MIPI_DSI_DCS_LONG_WRITE));
1014 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL,
1015 DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) |
1016 DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay));
1020 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
1024 ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1026 if (ctrl & DSI_CTRL_ENABLE) {
1027 dsi_write(msm_host, REG_DSI_CTRL, ctrl & ~DSI_CTRL_ENABLE);
1029 * dsi controller need to be disabled before
1035 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1036 wmb(); /* clocks need to be enabled before reset */
1038 /* dsi controller can only be reset while clocks are running */
1039 dsi_write(msm_host, REG_DSI_RESET, 1);
1040 msleep(DSI_RESET_TOGGLE_DELAY_MS); /* make sure reset happen */
1041 dsi_write(msm_host, REG_DSI_RESET, 0);
1042 wmb(); /* controller out of reset */
1044 if (ctrl & DSI_CTRL_ENABLE) {
1045 dsi_write(msm_host, REG_DSI_CTRL, ctrl);
1046 wmb(); /* make sure dsi controller enabled again */
1050 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
1051 bool video_mode, bool enable)
1055 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1058 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
1059 DSI_CTRL_CMD_MODE_EN);
1060 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
1061 DSI_IRQ_MASK_VIDEO_DONE, 0);
1064 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
1065 } else { /* command mode */
1066 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
1067 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
1069 dsi_ctrl |= DSI_CTRL_ENABLE;
1072 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
1075 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
1079 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
1082 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
1084 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
1086 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
1089 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
1092 struct device *dev = &msm_host->pdev->dev;
1094 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
1096 reinit_completion(&msm_host->video_comp);
1098 ret = wait_for_completion_timeout(&msm_host->video_comp,
1099 msecs_to_jiffies(70));
1102 DRM_DEV_ERROR(dev, "wait for video done timed out\n");
1104 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
1107 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
1111 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
1114 data = dsi_read(msm_host, REG_DSI_STATUS0);
1116 /* if video mode engine is not busy, its because
1117 * either timing engine was not turned on or the
1118 * DSI controller has finished transmitting the video
1119 * data already, so no need to wait in those cases
1121 if (!(data & DSI_STATUS0_VIDEO_MODE_ENGINE_BUSY))
1124 if (msm_host->power_on && msm_host->enabled) {
1125 dsi_wait4video_done(msm_host);
1126 /* delay 4 ms to skip BLLP */
1127 usleep_range(2000, 4000);
1131 int dsi_tx_buf_alloc_6g(struct msm_dsi_host *msm_host, int size)
1133 struct drm_device *dev = msm_host->dev;
1134 struct msm_drm_private *priv = dev->dev_private;
1138 msm_host->aspace = msm_gem_address_space_get(priv->kms->aspace);
1140 data = msm_gem_kernel_new(dev, size, MSM_BO_WC,
1142 &msm_host->tx_gem_obj, &iova);
1145 msm_host->tx_gem_obj = NULL;
1146 return PTR_ERR(data);
1149 msm_gem_object_set_name(msm_host->tx_gem_obj, "tx_gem");
1151 msm_host->tx_size = msm_host->tx_gem_obj->size;
1156 int dsi_tx_buf_alloc_v2(struct msm_dsi_host *msm_host, int size)
1158 struct drm_device *dev = msm_host->dev;
1160 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1161 &msm_host->tx_buf_paddr, GFP_KERNEL);
1162 if (!msm_host->tx_buf)
1165 msm_host->tx_size = size;
1170 void msm_dsi_tx_buf_free(struct mipi_dsi_host *host)
1172 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1173 struct drm_device *dev = msm_host->dev;
1176 * This is possible if we're tearing down before we've had a chance to
1177 * fully initialize. A very real possibility if our probe is deferred,
1178 * in which case we'll hit msm_dsi_host_destroy() without having run
1179 * through the dsi_tx_buf_alloc().
1184 if (msm_host->tx_gem_obj) {
1185 msm_gem_kernel_put(msm_host->tx_gem_obj, msm_host->aspace);
1186 msm_gem_address_space_put(msm_host->aspace);
1187 msm_host->tx_gem_obj = NULL;
1188 msm_host->aspace = NULL;
1191 if (msm_host->tx_buf)
1192 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1193 msm_host->tx_buf_paddr);
1196 void *dsi_tx_buf_get_6g(struct msm_dsi_host *msm_host)
1198 return msm_gem_get_vaddr(msm_host->tx_gem_obj);
1201 void *dsi_tx_buf_get_v2(struct msm_dsi_host *msm_host)
1203 return msm_host->tx_buf;
1206 void dsi_tx_buf_put_6g(struct msm_dsi_host *msm_host)
1208 msm_gem_put_vaddr(msm_host->tx_gem_obj);
1212 * prepare cmd buffer to be txed
1214 static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1215 const struct mipi_dsi_msg *msg)
1217 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1218 struct mipi_dsi_packet packet;
1223 ret = mipi_dsi_create_packet(&packet, msg);
1225 pr_err("%s: create packet failed, %d\n", __func__, ret);
1228 len = (packet.size + 3) & (~0x3);
1230 if (len > msm_host->tx_size) {
1231 pr_err("%s: packet size is too big\n", __func__);
1235 data = cfg_hnd->ops->tx_buf_get(msm_host);
1237 ret = PTR_ERR(data);
1238 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1242 /* MSM specific command format in memory */
1243 data[0] = packet.header[1];
1244 data[1] = packet.header[2];
1245 data[2] = packet.header[0];
1246 data[3] = BIT(7); /* Last packet */
1247 if (mipi_dsi_packet_format_is_long(msg->type))
1249 if (msg->rx_buf && msg->rx_len)
1253 if (packet.payload && packet.payload_length)
1254 memcpy(data + 4, packet.payload, packet.payload_length);
1256 /* Append 0xff to the end */
1257 if (packet.size < len)
1258 memset(data + packet.size, 0xff, len - packet.size);
1260 if (cfg_hnd->ops->tx_buf_put)
1261 cfg_hnd->ops->tx_buf_put(msm_host);
1267 * dsi_short_read1_resp: 1 parameter
1269 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1271 u8 *data = msg->rx_buf;
1272 if (data && (msg->rx_len >= 1)) {
1273 *data = buf[1]; /* strip out dcs type */
1276 pr_err("%s: read data does not match with rx_buf len %zu\n",
1277 __func__, msg->rx_len);
1283 * dsi_short_read2_resp: 2 parameter
1285 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1287 u8 *data = msg->rx_buf;
1288 if (data && (msg->rx_len >= 2)) {
1289 data[0] = buf[1]; /* strip out dcs type */
1293 pr_err("%s: read data does not match with rx_buf len %zu\n",
1294 __func__, msg->rx_len);
1299 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1301 /* strip out 4 byte dcs header */
1302 if (msg->rx_buf && msg->rx_len)
1303 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1308 int dsi_dma_base_get_6g(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1310 struct drm_device *dev = msm_host->dev;
1311 struct msm_drm_private *priv = dev->dev_private;
1316 return msm_gem_get_and_pin_iova(msm_host->tx_gem_obj,
1317 priv->kms->aspace, dma_base);
1320 int dsi_dma_base_get_v2(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1325 *dma_base = msm_host->tx_buf_paddr;
1329 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1331 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1336 ret = cfg_hnd->ops->dma_base_get(msm_host, &dma_base);
1338 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1342 reinit_completion(&msm_host->dma_comp);
1344 dsi_wait4video_eng_busy(msm_host);
1346 triggered = msm_dsi_manager_cmd_xfer_trigger(
1347 msm_host->id, dma_base, len);
1349 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1350 msecs_to_jiffies(200));
1362 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1363 u8 *buf, int rx_byte, int pkt_size)
1369 int repeated_bytes = 0;
1370 int buf_offset = buf - msm_host->rx_buf;
1373 cnt = (rx_byte + 3) >> 2;
1375 cnt = 4; /* 4 x 32 bits registers only */
1380 read_cnt = pkt_size + 6;
1383 * In case of multiple reads from the panel, after the first read, there
1384 * is possibility that there are some bytes in the payload repeating in
1385 * the RDBK_DATA registers. Since we read all the parameters from the
1386 * panel right from the first byte for every pass. We need to skip the
1387 * repeating bytes and then append the new parameters to the rx buffer.
1389 if (read_cnt > 16) {
1391 /* Any data more than 16 bytes will be shifted out.
1392 * The temp read buffer should already contain these bytes.
1393 * The remaining bytes in read buffer are the repeated bytes.
1395 bytes_shifted = read_cnt - 16;
1396 repeated_bytes = buf_offset - bytes_shifted;
1399 for (i = cnt - 1; i >= 0; i--) {
1400 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1401 *temp++ = ntohl(data); /* to host byte order */
1402 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1405 for (i = repeated_bytes; i < 16; i++)
1411 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1412 const struct mipi_dsi_msg *msg)
1415 int bllp_len = msm_host->mode->hdisplay *
1416 dsi_get_bpp(msm_host->format) / 8;
1418 len = dsi_cmd_dma_add(msm_host, msg);
1420 pr_err("%s: failed to add cmd type = 0x%x\n",
1421 __func__, msg->type);
1425 /* for video mode, do not send cmds more than
1426 * one pixel line, since it only transmit it
1429 /* TODO: if the command is sent in LP mode, the bit rate is only
1430 * half of esc clk rate. In this case, if the video is already
1431 * actively streaming, we need to check more carefully if the
1432 * command can be fit into one BLLP.
1434 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1435 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1440 ret = dsi_cmd_dma_tx(msm_host, len);
1442 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d, ret=%d\n",
1443 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len, ret);
1445 } else if (ret < len) {
1446 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, ret=%d len=%d\n",
1447 __func__, msg->type, (*(u8 *)(msg->tx_buf)), ret, len);
1454 static void dsi_err_worker(struct work_struct *work)
1456 struct msm_dsi_host *msm_host =
1457 container_of(work, struct msm_dsi_host, err_work);
1458 u32 status = msm_host->err_work_state;
1460 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1461 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1462 dsi_sw_reset(msm_host);
1464 /* It is safe to clear here because error irq is disabled. */
1465 msm_host->err_work_state = 0;
1467 /* enable dsi error interrupt */
1468 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1471 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1475 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1478 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1479 /* Writing of an extra 0 needed to clear error bits */
1480 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1481 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1485 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1489 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1492 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1493 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1497 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1501 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1503 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1504 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1505 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1506 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1507 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1508 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1509 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1513 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1517 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1519 /* fifo underflow, overflow */
1521 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1522 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1523 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1524 msm_host->err_work_state |=
1525 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1529 static void dsi_status(struct msm_dsi_host *msm_host)
1533 status = dsi_read(msm_host, REG_DSI_STATUS0);
1535 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1536 dsi_write(msm_host, REG_DSI_STATUS0, status);
1537 msm_host->err_work_state |=
1538 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1542 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1546 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1548 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1549 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1550 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1554 static void dsi_error(struct msm_dsi_host *msm_host)
1556 /* disable dsi error interrupt */
1557 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1559 dsi_clk_status(msm_host);
1560 dsi_fifo_status(msm_host);
1561 dsi_ack_err_status(msm_host);
1562 dsi_timeout_status(msm_host);
1563 dsi_status(msm_host);
1564 dsi_dln0_phy_err(msm_host);
1566 queue_work(msm_host->workqueue, &msm_host->err_work);
1569 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1571 struct msm_dsi_host *msm_host = ptr;
1573 unsigned long flags;
1575 if (!msm_host->ctrl_base)
1578 spin_lock_irqsave(&msm_host->intr_lock, flags);
1579 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1580 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1581 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1583 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1585 if (isr & DSI_IRQ_ERROR)
1586 dsi_error(msm_host);
1588 if (isr & DSI_IRQ_VIDEO_DONE)
1589 complete(&msm_host->video_comp);
1591 if (isr & DSI_IRQ_CMD_DMA_DONE)
1592 complete(&msm_host->dma_comp);
1597 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1598 struct device *panel_device)
1600 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1603 if (IS_ERR(msm_host->disp_en_gpio)) {
1604 DBG("cannot get disp-enable-gpios %ld",
1605 PTR_ERR(msm_host->disp_en_gpio));
1606 return PTR_ERR(msm_host->disp_en_gpio);
1609 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1611 if (IS_ERR(msm_host->te_gpio)) {
1612 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1613 return PTR_ERR(msm_host->te_gpio);
1619 static int dsi_host_attach(struct mipi_dsi_host *host,
1620 struct mipi_dsi_device *dsi)
1622 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1625 if (dsi->lanes > msm_host->num_data_lanes)
1628 msm_host->channel = dsi->channel;
1629 msm_host->lanes = dsi->lanes;
1630 msm_host->format = dsi->format;
1631 msm_host->mode_flags = dsi->mode_flags;
1633 msm_host->dsc = dsi->dsc;
1635 /* Some gpios defined in panel DT need to be controlled by host */
1636 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1640 ret = dsi_dev_attach(msm_host->pdev);
1644 DBG("id=%d", msm_host->id);
1649 static int dsi_host_detach(struct mipi_dsi_host *host,
1650 struct mipi_dsi_device *dsi)
1652 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1654 dsi_dev_detach(msm_host->pdev);
1656 DBG("id=%d", msm_host->id);
1661 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1662 const struct mipi_dsi_msg *msg)
1664 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1667 if (!msg || !msm_host->power_on)
1670 mutex_lock(&msm_host->cmd_mutex);
1671 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1672 mutex_unlock(&msm_host->cmd_mutex);
1677 static const struct mipi_dsi_host_ops dsi_host_ops = {
1678 .attach = dsi_host_attach,
1679 .detach = dsi_host_detach,
1680 .transfer = dsi_host_transfer,
1684 * List of supported physical to logical lane mappings.
1685 * For example, the 2nd entry represents the following mapping:
1687 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1689 static const int supported_data_lane_swaps[][4] = {
1700 static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1701 struct device_node *ep)
1703 struct device *dev = &msm_host->pdev->dev;
1704 struct property *prop;
1706 int ret, i, len, num_lanes;
1708 prop = of_find_property(ep, "data-lanes", &len);
1711 "failed to find data lane mapping, using default\n");
1712 /* Set the number of date lanes to 4 by default. */
1713 msm_host->num_data_lanes = 4;
1717 num_lanes = drm_of_get_data_lanes_count(ep, 1, 4);
1718 if (num_lanes < 0) {
1719 DRM_DEV_ERROR(dev, "bad number of data lanes\n");
1723 msm_host->num_data_lanes = num_lanes;
1725 ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
1728 DRM_DEV_ERROR(dev, "failed to read lane data\n");
1733 * compare DT specified physical-logical lane mappings with the ones
1734 * supported by hardware
1736 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1737 const int *swap = supported_data_lane_swaps[i];
1741 * the data-lanes array we get from DT has a logical->physical
1742 * mapping. The "data lane swap" register field represents
1743 * supported configurations in a physical->logical mapping.
1744 * Translate the DT mapping to what we understand and find a
1745 * configuration that works.
1747 for (j = 0; j < num_lanes; j++) {
1748 if (lane_map[j] < 0 || lane_map[j] > 3)
1749 DRM_DEV_ERROR(dev, "bad physical lane entry %u\n",
1752 if (swap[lane_map[j]] != j)
1756 if (j == num_lanes) {
1757 msm_host->dlane_swap = i;
1765 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc)
1769 if (dsc->bits_per_pixel & 0xf) {
1770 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support fractional bits_per_pixel\n");
1774 if (dsc->bits_per_component != 8) {
1775 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support bits_per_component != 8 yet\n");
1779 dsc->simple_422 = 0;
1780 dsc->convert_rgb = 1;
1781 dsc->vbr_enable = 0;
1783 drm_dsc_set_const_params(dsc);
1784 drm_dsc_set_rc_buf_thresh(dsc);
1786 /* handle only bpp = bpc = 8, pre-SCR panels */
1787 ret = drm_dsc_setup_rc_params(dsc, DRM_DSC_1_1_PRE_SCR);
1789 DRM_DEV_ERROR(&msm_host->pdev->dev, "could not find DSC RC parameters\n");
1793 dsc->initial_scale_value = drm_dsc_initial_scale_value(dsc);
1794 dsc->line_buf_depth = dsc->bits_per_component + 1;
1796 return drm_dsc_compute_rc_parameters(dsc);
1799 static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1801 struct device *dev = &msm_host->pdev->dev;
1802 struct device_node *np = dev->of_node;
1803 struct device_node *endpoint;
1807 * Get the endpoint of the output port of the DSI host. In our case,
1808 * this is mapped to port number with reg = 1. Don't return an error if
1809 * the remote endpoint isn't defined. It's possible that there is
1810 * nothing connected to the dsi output.
1812 endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
1814 DRM_DEV_DEBUG(dev, "%s: no endpoint\n", __func__);
1818 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1820 DRM_DEV_ERROR(dev, "%s: invalid lane configuration %d\n",
1826 if (of_property_read_bool(np, "syscon-sfpb")) {
1827 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1829 if (IS_ERR(msm_host->sfpb)) {
1830 DRM_DEV_ERROR(dev, "%s: failed to get sfpb regmap\n",
1832 ret = PTR_ERR(msm_host->sfpb);
1837 of_node_put(endpoint);
1842 static int dsi_host_get_id(struct msm_dsi_host *msm_host)
1844 struct platform_device *pdev = msm_host->pdev;
1845 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
1846 struct resource *res;
1849 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
1853 for (i = 0; i < VARIANTS_MAX; i++)
1854 for (j = 0; j < DSI_MAX; j++)
1855 if (cfg->io_start[i][j] == res->start)
1861 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1863 struct msm_dsi_host *msm_host = NULL;
1864 struct platform_device *pdev = msm_dsi->pdev;
1865 const struct msm_dsi_config *cfg;
1868 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1873 msm_host->pdev = pdev;
1874 msm_dsi->host = &msm_host->base;
1876 ret = dsi_host_parse_dt(msm_host);
1878 pr_err("%s: failed to parse dt\n", __func__);
1882 msm_host->ctrl_base = msm_ioremap_size(pdev, "dsi_ctrl", &msm_host->ctrl_size);
1883 if (IS_ERR(msm_host->ctrl_base)) {
1884 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1885 return PTR_ERR(msm_host->ctrl_base);
1888 pm_runtime_enable(&pdev->dev);
1890 msm_host->cfg_hnd = dsi_get_config(msm_host);
1891 if (!msm_host->cfg_hnd) {
1892 pr_err("%s: get config failed\n", __func__);
1895 cfg = msm_host->cfg_hnd->cfg;
1897 msm_host->id = dsi_host_get_id(msm_host);
1898 if (msm_host->id < 0) {
1899 pr_err("%s: unable to identify DSI host index\n", __func__);
1900 return msm_host->id;
1903 /* fixup base address by io offset */
1904 msm_host->ctrl_base += cfg->io_offset;
1906 ret = devm_regulator_bulk_get_const(&pdev->dev, cfg->num_regulators,
1907 cfg->regulator_data,
1908 &msm_host->supplies);
1912 ret = dsi_clk_init(msm_host);
1914 pr_err("%s: unable to initialize dsi clks\n", __func__);
1918 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1919 if (!msm_host->rx_buf) {
1920 pr_err("%s: alloc rx temp buf failed\n", __func__);
1924 ret = devm_pm_opp_set_clkname(&pdev->dev, "byte");
1927 /* OPP table is optional */
1928 ret = devm_pm_opp_of_add_table(&pdev->dev);
1929 if (ret && ret != -ENODEV) {
1930 dev_err(&pdev->dev, "invalid OPP table in device tree\n");
1934 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1935 if (!msm_host->irq) {
1936 dev_err(&pdev->dev, "failed to get irq\n");
1940 /* do not autoenable, will be enabled later */
1941 ret = devm_request_irq(&pdev->dev, msm_host->irq, dsi_host_irq,
1942 IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
1943 "dsi_isr", msm_host);
1945 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1946 msm_host->irq, ret);
1950 init_completion(&msm_host->dma_comp);
1951 init_completion(&msm_host->video_comp);
1952 mutex_init(&msm_host->dev_mutex);
1953 mutex_init(&msm_host->cmd_mutex);
1954 spin_lock_init(&msm_host->intr_lock);
1956 /* setup workqueue */
1957 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1958 if (!msm_host->workqueue)
1961 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1963 msm_dsi->id = msm_host->id;
1965 DBG("Dsi Host %d initialized", msm_host->id);
1969 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1971 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1974 if (msm_host->workqueue) {
1975 destroy_workqueue(msm_host->workqueue);
1976 msm_host->workqueue = NULL;
1979 mutex_destroy(&msm_host->cmd_mutex);
1980 mutex_destroy(&msm_host->dev_mutex);
1982 pm_runtime_disable(&msm_host->pdev->dev);
1985 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
1986 struct drm_device *dev)
1988 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1989 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1992 msm_host->dev = dev;
1994 ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
1996 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
2003 int msm_dsi_host_register(struct mipi_dsi_host *host)
2005 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2008 /* Register mipi dsi host */
2009 if (!msm_host->registered) {
2010 host->dev = &msm_host->pdev->dev;
2011 host->ops = &dsi_host_ops;
2012 ret = mipi_dsi_host_register(host);
2016 msm_host->registered = true;
2022 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
2024 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2026 if (msm_host->registered) {
2027 mipi_dsi_host_unregister(host);
2030 msm_host->registered = false;
2034 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
2035 const struct mipi_dsi_msg *msg)
2037 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2038 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2040 /* TODO: make sure dsi_cmd_mdp is idle.
2041 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
2042 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
2043 * How to handle the old versions? Wait for mdp cmd done?
2047 * mdss interrupt is generated in mdp core clock domain
2048 * mdp clock need to be enabled to receive dsi interrupt
2050 pm_runtime_get_sync(&msm_host->pdev->dev);
2051 cfg_hnd->ops->link_clk_set_rate(msm_host);
2052 cfg_hnd->ops->link_clk_enable(msm_host);
2054 /* TODO: vote for bus bandwidth */
2056 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2057 dsi_set_tx_power_mode(0, msm_host);
2059 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
2060 dsi_write(msm_host, REG_DSI_CTRL,
2061 msm_host->dma_cmd_ctrl_restore |
2062 DSI_CTRL_CMD_MODE_EN |
2064 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
2069 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
2070 const struct mipi_dsi_msg *msg)
2072 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2073 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2075 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
2076 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
2078 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2079 dsi_set_tx_power_mode(1, msm_host);
2081 /* TODO: unvote for bus bandwidth */
2083 cfg_hnd->ops->link_clk_disable(msm_host);
2084 pm_runtime_put(&msm_host->pdev->dev);
2087 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
2088 const struct mipi_dsi_msg *msg)
2090 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2092 return dsi_cmds2buf_tx(msm_host, msg);
2095 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
2096 const struct mipi_dsi_msg *msg)
2098 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2099 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2100 int data_byte, rx_byte, dlen, end;
2101 int short_response, diff, pkt_size, ret = 0;
2103 int rlen = msg->rx_len;
2112 data_byte = 10; /* first read */
2113 if (rlen < data_byte)
2116 pkt_size = data_byte;
2117 rx_byte = data_byte + 6; /* 4 header + 2 crc */
2120 buf = msm_host->rx_buf;
2123 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
2124 struct mipi_dsi_msg max_pkt_size_msg = {
2125 .channel = msg->channel,
2126 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
2131 DBG("rlen=%d pkt_size=%d rx_byte=%d",
2132 rlen, pkt_size, rx_byte);
2134 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
2136 pr_err("%s: Set max pkt size failed, %d\n",
2141 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
2142 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
2143 /* Clear the RDBK_DATA registers */
2144 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
2145 DSI_RDBK_DATA_CTRL_CLR);
2146 wmb(); /* make sure the RDBK registers are cleared */
2147 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
2148 wmb(); /* release cleared status before transfer */
2151 ret = dsi_cmds2buf_tx(msm_host, msg);
2153 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
2155 } else if (ret < msg->tx_len) {
2156 pr_err("%s: Read cmd Tx failed, too short: %d\n", __func__, ret);
2161 * once cmd_dma_done interrupt received,
2162 * return data from client is ready and stored
2163 * at RDBK_DATA register already
2164 * since rx fifo is 16 bytes, dcs header is kept at first loop,
2165 * after that dcs header lost during shift into registers
2167 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
2175 if (rlen <= data_byte) {
2176 diff = data_byte - rlen;
2184 dlen -= 2; /* 2 crc */
2186 buf += dlen; /* next start position */
2187 data_byte = 14; /* NOT first read */
2188 if (rlen < data_byte)
2191 pkt_size += data_byte;
2192 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
2197 * For single Long read, if the requested rlen < 10,
2198 * we need to shift the start position of rx
2199 * data buffer to skip the bytes which are not
2202 if (pkt_size < 10 && !short_response)
2203 buf = msm_host->rx_buf + (10 - rlen);
2205 buf = msm_host->rx_buf;
2209 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2210 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2213 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2214 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2215 ret = dsi_short_read1_resp(buf, msg);
2217 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2218 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2219 ret = dsi_short_read2_resp(buf, msg);
2221 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2222 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2223 ret = dsi_long_read_resp(buf, msg);
2226 pr_warn("%s:Invalid response cmd\n", __func__);
2233 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2236 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2238 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2239 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2240 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2242 /* Make sure trigger happens */
2246 void msm_dsi_host_set_phy_mode(struct mipi_dsi_host *host,
2247 struct msm_dsi_phy *src_phy)
2249 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2251 msm_host->cphy_mode = src_phy->cphy_mode;
2254 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
2256 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2259 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
2260 /* Make sure fully reset */
2263 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
2267 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
2268 struct msm_dsi_phy_clk_request *clk_req,
2271 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2272 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2275 ret = cfg_hnd->ops->calc_clk_rate(msm_host, is_bonded_dsi);
2277 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2281 /* CPHY transmits 16 bits over 7 clock cycles
2282 * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
2283 * so multiply by 7 to get the "bitclk rate"
2285 if (msm_host->cphy_mode)
2286 clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
2288 clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
2289 clk_req->escclk_rate = msm_host->esc_clk_rate;
2292 void msm_dsi_host_enable_irq(struct mipi_dsi_host *host)
2294 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2296 enable_irq(msm_host->irq);
2299 void msm_dsi_host_disable_irq(struct mipi_dsi_host *host)
2301 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2303 disable_irq(msm_host->irq);
2306 int msm_dsi_host_enable(struct mipi_dsi_host *host)
2308 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2310 dsi_op_mode_config(msm_host,
2311 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2313 /* TODO: clock should be turned off for command mode,
2314 * and only turned on before MDP START.
2315 * This part of code should be enabled once mdp driver support it.
2317 /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
2318 * dsi_link_clk_disable(msm_host);
2319 * pm_runtime_put(&msm_host->pdev->dev);
2322 msm_host->enabled = true;
2326 int msm_dsi_host_disable(struct mipi_dsi_host *host)
2328 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2330 msm_host->enabled = false;
2331 dsi_op_mode_config(msm_host,
2332 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2334 /* Since we have disabled INTF, the video engine won't stop so that
2335 * the cmd engine will be blocked.
2336 * Reset to disable video engine so that we can send off cmd.
2338 dsi_sw_reset(msm_host);
2343 static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2345 enum sfpb_ahb_arb_master_port_en en;
2347 if (!msm_host->sfpb)
2350 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2352 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2353 SFPB_GPREG_MASTER_PORT_EN__MASK,
2354 SFPB_GPREG_MASTER_PORT_EN(en));
2357 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
2358 struct msm_dsi_phy_shared_timings *phy_shared_timings,
2359 bool is_bonded_dsi, struct msm_dsi_phy *phy)
2361 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2362 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2365 mutex_lock(&msm_host->dev_mutex);
2366 if (msm_host->power_on) {
2367 DBG("dsi host already on");
2371 msm_host->byte_intf_clk_rate = msm_host->byte_clk_rate;
2372 if (phy_shared_timings->byte_intf_clk_div_2)
2373 msm_host->byte_intf_clk_rate /= 2;
2375 msm_dsi_sfpb_config(msm_host, true);
2377 ret = regulator_bulk_enable(msm_host->cfg_hnd->cfg->num_regulators,
2378 msm_host->supplies);
2380 pr_err("%s:Failed to enable vregs.ret=%d\n",
2385 pm_runtime_get_sync(&msm_host->pdev->dev);
2386 ret = cfg_hnd->ops->link_clk_set_rate(msm_host);
2388 ret = cfg_hnd->ops->link_clk_enable(msm_host);
2390 pr_err("%s: failed to enable link clocks. ret=%d\n",
2392 goto fail_disable_reg;
2395 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2397 pr_err("%s: failed to set pinctrl default state, %d\n",
2399 goto fail_disable_clk;
2402 dsi_timing_setup(msm_host, is_bonded_dsi);
2403 dsi_sw_reset(msm_host);
2404 dsi_ctrl_enable(msm_host, phy_shared_timings, phy);
2406 if (msm_host->disp_en_gpio)
2407 gpiod_set_value(msm_host->disp_en_gpio, 1);
2409 msm_host->power_on = true;
2410 mutex_unlock(&msm_host->dev_mutex);
2415 cfg_hnd->ops->link_clk_disable(msm_host);
2416 pm_runtime_put(&msm_host->pdev->dev);
2418 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2419 msm_host->supplies);
2421 mutex_unlock(&msm_host->dev_mutex);
2425 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2427 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2428 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2430 mutex_lock(&msm_host->dev_mutex);
2431 if (!msm_host->power_on) {
2432 DBG("dsi host already off");
2436 dsi_ctrl_disable(msm_host);
2438 if (msm_host->disp_en_gpio)
2439 gpiod_set_value(msm_host->disp_en_gpio, 0);
2441 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2443 cfg_hnd->ops->link_clk_disable(msm_host);
2444 pm_runtime_put(&msm_host->pdev->dev);
2446 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2447 msm_host->supplies);
2449 msm_dsi_sfpb_config(msm_host, false);
2453 msm_host->power_on = false;
2456 mutex_unlock(&msm_host->dev_mutex);
2460 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2461 const struct drm_display_mode *mode)
2463 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2465 if (msm_host->mode) {
2466 drm_mode_destroy(msm_host->dev, msm_host->mode);
2467 msm_host->mode = NULL;
2470 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2471 if (!msm_host->mode) {
2472 pr_err("%s: cannot duplicate mode\n", __func__);
2479 enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
2480 const struct drm_display_mode *mode)
2482 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2483 struct drm_dsc_config *dsc = msm_host->dsc;
2484 int pic_width = mode->hdisplay;
2485 int pic_height = mode->vdisplay;
2490 if (pic_width % dsc->slice_width) {
2491 pr_err("DSI: pic_width %d has to be multiple of slice %d\n",
2492 pic_width, dsc->slice_width);
2493 return MODE_H_ILLEGAL;
2496 if (pic_height % dsc->slice_height) {
2497 pr_err("DSI: pic_height %d has to be multiple of slice %d\n",
2498 pic_height, dsc->slice_height);
2499 return MODE_V_ILLEGAL;
2505 unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
2507 return to_msm_dsi_host(host)->mode_flags;
2510 void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
2512 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2514 pm_runtime_get_sync(&msm_host->pdev->dev);
2516 msm_disp_snapshot_add_block(disp_state, msm_host->ctrl_size,
2517 msm_host->ctrl_base, "dsi%d_ctrl", msm_host->id);
2519 pm_runtime_put_sync(&msm_host->pdev->dev);
2522 static void msm_dsi_host_video_test_pattern_setup(struct msm_dsi_host *msm_host)
2526 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2528 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_VIDEO_INIT_VAL, 0xff);
2529 /* draw checkered rectangle pattern */
2530 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL,
2531 DSI_TPG_MAIN_CONTROL_CHECKERED_RECTANGLE_PATTERN);
2532 /* use 24-bit RGB test pttern */
2533 dsi_write(msm_host, REG_DSI_TPG_VIDEO_CONFIG,
2534 DSI_TPG_VIDEO_CONFIG_BPP(VIDEO_CONFIG_24BPP) |
2535 DSI_TPG_VIDEO_CONFIG_RGB);
2537 reg |= DSI_TEST_PATTERN_GEN_CTRL_VIDEO_PATTERN_SEL(VID_MDSS_GENERAL_PATTERN);
2538 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2540 DBG("Video test pattern setup done\n");
2543 static void msm_dsi_host_cmd_test_pattern_setup(struct msm_dsi_host *msm_host)
2547 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2549 /* initial value for test pattern */
2550 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_MDP_INIT_VAL0, 0xff);
2552 reg |= DSI_TEST_PATTERN_GEN_CTRL_CMD_MDP_STREAM0_PATTERN_SEL(CMD_MDP_MDSS_GENERAL_PATTERN);
2554 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2555 /* draw checkered rectangle pattern */
2556 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL2,
2557 DSI_TPG_MAIN_CONTROL2_CMD_MDP0_CHECKERED_RECTANGLE_PATTERN);
2559 DBG("Cmd test pattern setup done\n");
2562 void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host)
2564 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2565 bool is_video_mode = !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO);
2569 msm_dsi_host_video_test_pattern_setup(msm_host);
2571 msm_dsi_host_cmd_test_pattern_setup(msm_host);
2573 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2574 /* enable the test pattern generator */
2575 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, (reg | DSI_TEST_PATTERN_GEN_CTRL_EN));
2577 /* for command mode need to trigger one frame from tpg */
2579 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER,
2580 DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER_SW_TRIGGER);
2583 struct drm_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host)
2585 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2587 return msm_host->dsc;