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 = 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 = 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 = 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;
187 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
189 return readl(msm_host->ctrl_base + reg);
191 static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
193 writel(data, msm_host->ctrl_base + reg);
196 static const struct msm_dsi_cfg_handler *dsi_get_config(
197 struct msm_dsi_host *msm_host)
199 const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
200 struct device *dev = &msm_host->pdev->dev;
203 u32 major = 0, minor = 0;
205 ahb_clk = msm_clk_get(msm_host->pdev, "iface");
206 if (IS_ERR(ahb_clk)) {
207 pr_err("%s: cannot get interface clock\n", __func__);
211 pm_runtime_get_sync(dev);
213 ret = clk_prepare_enable(ahb_clk);
215 pr_err("%s: unable to enable ahb_clk\n", __func__);
219 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
221 pr_err("%s: Invalid version\n", __func__);
225 cfg_hnd = msm_dsi_cfg_get(major, minor);
227 DBG("%s: Version %x:%x\n", __func__, major, minor);
230 clk_disable_unprepare(ahb_clk);
232 pm_runtime_put_sync(dev);
237 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
239 return container_of(host, struct msm_dsi_host, base);
242 int dsi_clk_init_v2(struct msm_dsi_host *msm_host)
244 struct platform_device *pdev = msm_host->pdev;
247 msm_host->src_clk = msm_clk_get(pdev, "src");
249 if (IS_ERR(msm_host->src_clk)) {
250 ret = PTR_ERR(msm_host->src_clk);
251 pr_err("%s: can't find src clock. ret=%d\n",
253 msm_host->src_clk = NULL;
260 int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host)
262 struct platform_device *pdev = msm_host->pdev;
265 msm_host->byte_intf_clk = msm_clk_get(pdev, "byte_intf");
266 if (IS_ERR(msm_host->byte_intf_clk)) {
267 ret = PTR_ERR(msm_host->byte_intf_clk);
268 pr_err("%s: can't find byte_intf clock. ret=%d\n",
275 static int dsi_clk_init(struct msm_dsi_host *msm_host)
277 struct platform_device *pdev = msm_host->pdev;
278 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
279 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
283 for (i = 0; i < cfg->num_bus_clks; i++)
284 msm_host->bus_clks[i].id = cfg->bus_clk_names[i];
285 msm_host->num_bus_clks = cfg->num_bus_clks;
287 ret = devm_clk_bulk_get(&pdev->dev, msm_host->num_bus_clks, msm_host->bus_clks);
289 dev_err(&pdev->dev, "Unable to get clocks, ret = %d\n", ret);
293 /* get link and source clocks */
294 msm_host->byte_clk = msm_clk_get(pdev, "byte");
295 if (IS_ERR(msm_host->byte_clk)) {
296 ret = PTR_ERR(msm_host->byte_clk);
297 pr_err("%s: can't find dsi_byte clock. ret=%d\n",
299 msm_host->byte_clk = NULL;
303 msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
304 if (IS_ERR(msm_host->pixel_clk)) {
305 ret = PTR_ERR(msm_host->pixel_clk);
306 pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
308 msm_host->pixel_clk = NULL;
312 msm_host->esc_clk = msm_clk_get(pdev, "core");
313 if (IS_ERR(msm_host->esc_clk)) {
314 ret = PTR_ERR(msm_host->esc_clk);
315 pr_err("%s: can't find dsi_esc clock. ret=%d\n",
317 msm_host->esc_clk = NULL;
321 if (cfg_hnd->ops->clk_init_ver)
322 ret = cfg_hnd->ops->clk_init_ver(msm_host);
327 int msm_dsi_runtime_suspend(struct device *dev)
329 struct platform_device *pdev = to_platform_device(dev);
330 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
331 struct mipi_dsi_host *host = msm_dsi->host;
332 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
334 if (!msm_host->cfg_hnd)
337 clk_bulk_disable_unprepare(msm_host->num_bus_clks, msm_host->bus_clks);
342 int msm_dsi_runtime_resume(struct device *dev)
344 struct platform_device *pdev = to_platform_device(dev);
345 struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
346 struct mipi_dsi_host *host = msm_dsi->host;
347 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
349 if (!msm_host->cfg_hnd)
352 return clk_bulk_prepare_enable(msm_host->num_bus_clks, msm_host->bus_clks);
355 int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
359 DBG("Set clk rates: pclk=%lu, byteclk=%lu",
360 msm_host->pixel_clk_rate, msm_host->byte_clk_rate);
362 ret = dev_pm_opp_set_rate(&msm_host->pdev->dev,
363 msm_host->byte_clk_rate);
365 pr_err("%s: dev_pm_opp_set_rate failed %d\n", __func__, ret);
369 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
371 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
375 if (msm_host->byte_intf_clk) {
376 ret = clk_set_rate(msm_host->byte_intf_clk, msm_host->byte_intf_clk_rate);
378 pr_err("%s: Failed to set rate byte intf clk, %d\n",
388 int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
392 ret = clk_prepare_enable(msm_host->esc_clk);
394 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
398 ret = clk_prepare_enable(msm_host->byte_clk);
400 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
404 ret = clk_prepare_enable(msm_host->pixel_clk);
406 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
410 ret = clk_prepare_enable(msm_host->byte_intf_clk);
412 pr_err("%s: Failed to enable byte intf clk\n",
414 goto byte_intf_clk_err;
420 clk_disable_unprepare(msm_host->pixel_clk);
422 clk_disable_unprepare(msm_host->byte_clk);
424 clk_disable_unprepare(msm_host->esc_clk);
429 int dsi_link_clk_set_rate_v2(struct msm_dsi_host *msm_host)
433 DBG("Set clk rates: pclk=%lu, byteclk=%lu, esc_clk=%lu, dsi_src_clk=%lu",
434 msm_host->pixel_clk_rate, msm_host->byte_clk_rate,
435 msm_host->esc_clk_rate, msm_host->src_clk_rate);
437 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
439 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
443 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
445 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
449 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
451 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
455 ret = clk_set_rate(msm_host->pixel_clk, msm_host->pixel_clk_rate);
457 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
464 int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
468 ret = clk_prepare_enable(msm_host->byte_clk);
470 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
474 ret = clk_prepare_enable(msm_host->esc_clk);
476 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
480 ret = clk_prepare_enable(msm_host->src_clk);
482 pr_err("%s: Failed to enable dsi src clk\n", __func__);
486 ret = clk_prepare_enable(msm_host->pixel_clk);
488 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
495 clk_disable_unprepare(msm_host->src_clk);
497 clk_disable_unprepare(msm_host->esc_clk);
499 clk_disable_unprepare(msm_host->byte_clk);
504 void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host)
506 /* Drop the performance state vote */
507 dev_pm_opp_set_rate(&msm_host->pdev->dev, 0);
508 clk_disable_unprepare(msm_host->esc_clk);
509 clk_disable_unprepare(msm_host->pixel_clk);
510 clk_disable_unprepare(msm_host->byte_intf_clk);
511 clk_disable_unprepare(msm_host->byte_clk);
514 void dsi_link_clk_disable_v2(struct msm_dsi_host *msm_host)
516 clk_disable_unprepare(msm_host->pixel_clk);
517 clk_disable_unprepare(msm_host->src_clk);
518 clk_disable_unprepare(msm_host->esc_clk);
519 clk_disable_unprepare(msm_host->byte_clk);
523 * dsi_adjust_pclk_for_compression() - Adjust the pclk rate for compression case
524 * @mode: The selected mode for the DSI output
525 * @dsc: DRM DSC configuration for this DSI output
527 * Adjust the pclk rate by calculating a new hdisplay proportional to
528 * the compression ratio such that:
529 * new_hdisplay = old_hdisplay * compressed_bpp / uncompressed_bpp
531 * Porches do not need to be adjusted:
532 * - For VIDEO mode they are not compressed by DSC and are passed as is.
533 * - For CMD mode there are no actual porches. Instead these fields
534 * currently represent the overhead to the image data transfer. As such, they
535 * are calculated for the final mode parameters (after the compression) and
536 * are not to be adjusted too.
538 * FIXME: Reconsider this if/when CMD mode handling is rewritten to use
539 * transfer time and data overhead as a starting point of the calculations.
541 static unsigned long dsi_adjust_pclk_for_compression(const struct drm_display_mode *mode,
542 const struct drm_dsc_config *dsc)
544 int new_hdisplay = DIV_ROUND_UP(mode->hdisplay * drm_dsc_get_bpp_int(dsc),
545 dsc->bits_per_component * 3);
547 int new_htotal = mode->htotal - mode->hdisplay + new_hdisplay;
549 return new_htotal * mode->vtotal * drm_mode_vrefresh(mode);
552 static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode,
553 const struct drm_dsc_config *dsc, bool is_bonded_dsi)
555 unsigned long pclk_rate;
557 pclk_rate = mode->clock * 1000;
560 pclk_rate = dsi_adjust_pclk_for_compression(mode, dsc);
563 * For bonded DSI mode, the current DRM mode has the complete width of the
564 * panel. Since, the complete panel is driven by two DSI controllers,
565 * the clock rates have to be split between the two dsi controllers.
566 * Adjust the byte and pixel clock rates for each dsi host accordingly.
574 unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host *host, bool is_bonded_dsi,
575 const struct drm_display_mode *mode)
577 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
578 u8 lanes = msm_host->lanes;
579 u32 bpp = mipi_dsi_pixel_format_to_bpp(msm_host->format);
580 unsigned long pclk_rate = dsi_get_pclk_rate(mode, msm_host->dsc, is_bonded_dsi);
581 unsigned long pclk_bpp;
584 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
588 /* CPHY "byte_clk" is in units of 16 bits */
589 if (msm_host->cphy_mode)
590 pclk_bpp = mult_frac(pclk_rate, bpp, 16 * lanes);
592 pclk_bpp = mult_frac(pclk_rate, bpp, 8 * lanes);
597 static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
599 msm_host->pixel_clk_rate = dsi_get_pclk_rate(msm_host->mode, msm_host->dsc, is_bonded_dsi);
600 msm_host->byte_clk_rate = dsi_byte_clk_get_rate(&msm_host->base, is_bonded_dsi,
603 DBG("pclk=%lu, bclk=%lu", msm_host->pixel_clk_rate,
604 msm_host->byte_clk_rate);
608 int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
610 if (!msm_host->mode) {
611 pr_err("%s: mode not set\n", __func__);
615 dsi_calc_pclk(msm_host, is_bonded_dsi);
616 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
620 int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
622 u32 bpp = mipi_dsi_pixel_format_to_bpp(msm_host->format);
623 unsigned int esc_mhz, esc_div;
624 unsigned long byte_mhz;
626 dsi_calc_pclk(msm_host, is_bonded_dsi);
628 msm_host->src_clk_rate = mult_frac(msm_host->pixel_clk_rate, bpp, 8);
631 * esc clock is byte clock followed by a 4 bit divider,
632 * we need to find an escape clock frequency within the
633 * mipi DSI spec range within the maximum divider limit
634 * We iterate here between an escape clock frequencey
635 * between 20 Mhz to 5 Mhz and pick up the first one
636 * that can be supported by our divider
639 byte_mhz = msm_host->byte_clk_rate / 1000000;
641 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
642 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
645 * TODO: Ideally, we shouldn't know what sort of divider
646 * is available in mmss_cc, we're just assuming that
647 * it'll always be a 4 bit divider. Need to come up with
650 if (esc_div >= 1 && esc_div <= 16)
657 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
659 DBG("esc=%lu, src=%lu", msm_host->esc_clk_rate,
660 msm_host->src_clk_rate);
665 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
670 spin_lock_irqsave(&msm_host->intr_lock, flags);
671 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
678 DBG("intr=%x enable=%d", intr, enable);
680 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
681 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
684 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
686 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
688 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
689 return NON_BURST_SYNCH_PULSE;
691 return NON_BURST_SYNCH_EVENT;
694 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
695 const enum mipi_dsi_pixel_format mipi_fmt)
698 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
699 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
700 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
701 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
702 default: return VID_DST_FORMAT_RGB888;
706 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
707 const enum mipi_dsi_pixel_format mipi_fmt)
710 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
711 case MIPI_DSI_FMT_RGB666_PACKED:
712 case MIPI_DSI_FMT_RGB666: return CMD_DST_FORMAT_RGB666;
713 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
714 default: return CMD_DST_FORMAT_RGB888;
718 static void dsi_ctrl_disable(struct msm_dsi_host *msm_host)
720 dsi_write(msm_host, REG_DSI_CTRL, 0);
723 bool msm_dsi_host_is_wide_bus_enabled(struct mipi_dsi_host *host)
725 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
727 return msm_host->dsc &&
728 (msm_host->cfg_hnd->major == MSM_DSI_VER_MAJOR_6G &&
729 msm_host->cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V2_5_0);
732 static void dsi_ctrl_enable(struct msm_dsi_host *msm_host,
733 struct msm_dsi_phy_shared_timings *phy_shared_timings, struct msm_dsi_phy *phy)
735 u32 flags = msm_host->mode_flags;
736 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
737 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
738 u32 data = 0, lane_ctrl = 0;
740 if (flags & MIPI_DSI_MODE_VIDEO) {
741 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
742 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
743 if (flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
744 data |= DSI_VID_CFG0_HFP_POWER_STOP;
745 if (flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
746 data |= DSI_VID_CFG0_HBP_POWER_STOP;
747 if (flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
748 data |= DSI_VID_CFG0_HSA_POWER_STOP;
749 /* Always set low power stop mode for BLLP
750 * to let command engine send packets
752 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
753 DSI_VID_CFG0_BLLP_POWER_STOP;
754 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
755 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
756 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
757 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
759 /* Do not swap RGB colors */
760 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
761 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
763 /* Do not swap RGB colors */
764 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
765 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
766 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
768 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
769 DSI_CMD_CFG1_WR_MEM_CONTINUE(
770 MIPI_DCS_WRITE_MEMORY_CONTINUE);
771 /* Always insert DCS command */
772 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
773 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
775 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
776 data = dsi_read(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2);
778 if (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_3)
779 data |= DSI_CMD_MODE_MDP_CTRL2_BURST_MODE;
781 /* TODO: Allow for video-mode support once tested/fixed */
782 if (msm_dsi_host_is_wide_bus_enabled(&msm_host->base))
783 data |= DSI_CMD_MODE_MDP_CTRL2_DATABUS_WIDEN;
785 dsi_write(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2, data);
789 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
790 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
791 DSI_CMD_DMA_CTRL_LOW_POWER);
794 /* Always assume dedicated TE pin */
795 data |= DSI_TRIG_CTRL_TE;
796 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
797 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
798 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
799 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
800 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
801 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
802 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
804 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(phy_shared_timings->clk_post) |
805 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(phy_shared_timings->clk_pre);
806 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
808 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
809 (cfg_hnd->minor > MSM_DSI_6G_VER_MINOR_V1_0) &&
810 phy_shared_timings->clk_pre_inc_by_2)
811 dsi_write(msm_host, REG_DSI_T_CLK_PRE_EXTEND,
812 DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK);
815 if (!(flags & MIPI_DSI_MODE_NO_EOT_PACKET))
816 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
817 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
819 /* allow only ack-err-status to generate interrupt */
820 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
822 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
824 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
826 data = DSI_CTRL_CLK_EN;
828 DBG("lane number=%d", msm_host->lanes);
829 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
831 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
832 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
834 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) {
835 lane_ctrl = dsi_read(msm_host, REG_DSI_LANE_CTRL);
837 if (msm_dsi_phy_set_continuous_clock(phy, true))
838 lane_ctrl &= ~DSI_LANE_CTRL_HS_REQ_SEL_PHY;
840 dsi_write(msm_host, REG_DSI_LANE_CTRL,
841 lane_ctrl | DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
844 data |= DSI_CTRL_ENABLE;
846 dsi_write(msm_host, REG_DSI_CTRL, data);
848 if (msm_host->cphy_mode)
849 dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
852 static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mode, u32 hdisplay)
854 struct drm_dsc_config *dsc = msm_host->dsc;
855 u32 reg, reg_ctrl, reg_ctrl2;
856 u32 slice_per_intf, total_bytes_per_intf;
860 /* first calculate dsc parameters and then program
861 * compress mode registers
863 slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
865 total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
867 eol_byte_num = total_bytes_per_intf % 3;
870 * Typically, pkt_per_line = slice_per_intf * slice_per_pkt.
872 * Since the current driver only supports slice_per_pkt = 1,
873 * pkt_per_line will be equal to slice per intf for now.
875 pkt_per_line = slice_per_intf;
877 if (is_cmd_mode) /* packet data type */
878 reg = DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_LONG_WRITE);
880 reg = DSI_VIDEO_COMPRESSION_MODE_CTRL_DATATYPE(MIPI_DSI_COMPRESSED_PIXEL_STREAM);
882 /* DSI_VIDEO_COMPRESSION_MODE & DSI_COMMAND_COMPRESSION_MODE
883 * registers have similar offsets, so for below common code use
884 * DSI_VIDEO_COMPRESSION_MODE_XXXX for setting bits
886 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_PKT_PER_LINE(pkt_per_line >> 1);
887 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EOL_BYTE_NUM(eol_byte_num);
888 reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_EN;
891 reg_ctrl = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL);
892 reg_ctrl2 = dsi_read(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2);
897 reg_ctrl2 &= ~DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH__MASK;
898 reg_ctrl2 |= DSI_COMMAND_COMPRESSION_MODE_CTRL2_STREAM0_SLICE_WIDTH(dsc->slice_chunk_size);
900 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
901 dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
903 dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
907 static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
909 struct drm_display_mode *mode = msm_host->mode;
910 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
911 u32 h_total = mode->htotal;
912 u32 v_total = mode->vtotal;
913 u32 hs_end = mode->hsync_end - mode->hsync_start;
914 u32 vs_end = mode->vsync_end - mode->vsync_start;
915 u32 ha_start = h_total - mode->hsync_start;
916 u32 ha_end = ha_start + mode->hdisplay;
917 u32 va_start = v_total - mode->vsync_start;
918 u32 va_end = va_start + mode->vdisplay;
919 u32 hdisplay = mode->hdisplay;
922 bool wide_bus_enabled = msm_dsi_host_is_wide_bus_enabled(&msm_host->base);
927 * For bonded DSI mode, the current DRM mode has
928 * the complete width of the panel. Since, the complete
929 * panel is driven by two DSI controllers, the horizontal
930 * timings have to be split between the two dsi controllers.
931 * Adjust the DSI host timing values accordingly.
942 struct drm_dsc_config *dsc = msm_host->dsc;
945 /* update dsc params with timing params */
946 if (!dsc || !mode->hdisplay || !mode->vdisplay) {
947 pr_err("DSI: invalid input: pic_width: %d pic_height: %d\n",
948 mode->hdisplay, mode->vdisplay);
952 dsc->pic_width = mode->hdisplay;
953 dsc->pic_height = mode->vdisplay;
954 DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);
956 /* we do the calculations for dsc parameters here so that
957 * panel can use these parameters
959 ret = dsi_populate_dsc_params(msm_host, dsc);
964 * DPU sends 3 bytes per pclk cycle to DSI. If widebus is
965 * enabled, bus width is extended to 6 bytes.
967 * Calculate the number of pclks needed to transmit one line of
968 * the compressed data.
970 * The back/font porch and pulse width are kept intact. For
971 * VIDEO mode they represent timing parameters rather than
972 * actual data transfer, see the documentation for
973 * dsi_adjust_pclk_for_compression(). For CMD mode they are
977 if (wide_bus_enabled && !(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
982 hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), bytes_per_pclk);
985 ha_end = ha_start + hdisplay;
988 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
990 dsi_update_dsc_timing(msm_host, false, mode->hdisplay);
992 dsi_write(msm_host, REG_DSI_ACTIVE_H,
993 DSI_ACTIVE_H_START(ha_start) |
994 DSI_ACTIVE_H_END(ha_end));
995 dsi_write(msm_host, REG_DSI_ACTIVE_V,
996 DSI_ACTIVE_V_START(va_start) |
997 DSI_ACTIVE_V_END(va_end));
998 dsi_write(msm_host, REG_DSI_TOTAL,
999 DSI_TOTAL_H_TOTAL(h_total - 1) |
1000 DSI_TOTAL_V_TOTAL(v_total - 1));
1002 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
1003 DSI_ACTIVE_HSYNC_START(hs_start) |
1004 DSI_ACTIVE_HSYNC_END(hs_end));
1005 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
1006 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
1007 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
1008 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
1009 } else { /* command mode */
1011 dsi_update_dsc_timing(msm_host, true, mode->hdisplay);
1013 /* image data and 1 byte write_memory_start cmd */
1015 wc = hdisplay * mipi_dsi_pixel_format_to_bpp(msm_host->format) / 8 + 1;
1018 * When DSC is enabled, WC = slice_chunk_size * slice_per_pkt + 1.
1019 * Currently, the driver only supports default value of slice_per_pkt = 1
1021 * TODO: Expand mipi_dsi_device struct to hold slice_per_pkt info
1022 * and adjust DSC math to account for slice_per_pkt.
1024 wc = msm_host->dsc->slice_chunk_size + 1;
1026 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_CTRL,
1027 DSI_CMD_MDP_STREAM0_CTRL_WORD_COUNT(wc) |
1028 DSI_CMD_MDP_STREAM0_CTRL_VIRTUAL_CHANNEL(
1029 msm_host->channel) |
1030 DSI_CMD_MDP_STREAM0_CTRL_DATA_TYPE(
1031 MIPI_DSI_DCS_LONG_WRITE));
1033 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL,
1034 DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) |
1035 DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay));
1039 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
1043 ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1045 if (ctrl & DSI_CTRL_ENABLE) {
1046 dsi_write(msm_host, REG_DSI_CTRL, ctrl & ~DSI_CTRL_ENABLE);
1048 * dsi controller need to be disabled before
1054 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1055 wmb(); /* clocks need to be enabled before reset */
1057 /* dsi controller can only be reset while clocks are running */
1058 dsi_write(msm_host, REG_DSI_RESET, 1);
1059 msleep(DSI_RESET_TOGGLE_DELAY_MS); /* make sure reset happen */
1060 dsi_write(msm_host, REG_DSI_RESET, 0);
1061 wmb(); /* controller out of reset */
1063 if (ctrl & DSI_CTRL_ENABLE) {
1064 dsi_write(msm_host, REG_DSI_CTRL, ctrl);
1065 wmb(); /* make sure dsi controller enabled again */
1069 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
1070 bool video_mode, bool enable)
1074 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
1077 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
1078 DSI_CTRL_CMD_MODE_EN);
1079 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
1080 DSI_IRQ_MASK_VIDEO_DONE, 0);
1083 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
1084 } else { /* command mode */
1085 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
1086 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
1088 dsi_ctrl |= DSI_CTRL_ENABLE;
1091 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
1094 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
1098 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
1101 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
1103 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
1105 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
1108 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
1111 struct device *dev = &msm_host->pdev->dev;
1113 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
1115 reinit_completion(&msm_host->video_comp);
1117 ret = wait_for_completion_timeout(&msm_host->video_comp,
1118 msecs_to_jiffies(70));
1121 DRM_DEV_ERROR(dev, "wait for video done timed out\n");
1123 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
1126 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
1130 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
1133 data = dsi_read(msm_host, REG_DSI_STATUS0);
1135 /* if video mode engine is not busy, its because
1136 * either timing engine was not turned on or the
1137 * DSI controller has finished transmitting the video
1138 * data already, so no need to wait in those cases
1140 if (!(data & DSI_STATUS0_VIDEO_MODE_ENGINE_BUSY))
1143 if (msm_host->power_on && msm_host->enabled) {
1144 dsi_wait4video_done(msm_host);
1145 /* delay 4 ms to skip BLLP */
1146 usleep_range(2000, 4000);
1150 int dsi_tx_buf_alloc_6g(struct msm_dsi_host *msm_host, int size)
1152 struct drm_device *dev = msm_host->dev;
1153 struct msm_drm_private *priv = dev->dev_private;
1157 msm_host->aspace = msm_gem_address_space_get(priv->kms->aspace);
1159 data = msm_gem_kernel_new(dev, size, MSM_BO_WC,
1161 &msm_host->tx_gem_obj, &iova);
1164 msm_host->tx_gem_obj = NULL;
1165 return PTR_ERR(data);
1168 msm_gem_object_set_name(msm_host->tx_gem_obj, "tx_gem");
1170 msm_host->tx_size = msm_host->tx_gem_obj->size;
1175 int dsi_tx_buf_alloc_v2(struct msm_dsi_host *msm_host, int size)
1177 struct drm_device *dev = msm_host->dev;
1179 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1180 &msm_host->tx_buf_paddr, GFP_KERNEL);
1181 if (!msm_host->tx_buf)
1184 msm_host->tx_size = size;
1189 void msm_dsi_tx_buf_free(struct mipi_dsi_host *host)
1191 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1192 struct drm_device *dev = msm_host->dev;
1195 * This is possible if we're tearing down before we've had a chance to
1196 * fully initialize. A very real possibility if our probe is deferred,
1197 * in which case we'll hit msm_dsi_host_destroy() without having run
1198 * through the dsi_tx_buf_alloc().
1203 if (msm_host->tx_gem_obj) {
1204 msm_gem_kernel_put(msm_host->tx_gem_obj, msm_host->aspace);
1205 msm_gem_address_space_put(msm_host->aspace);
1206 msm_host->tx_gem_obj = NULL;
1207 msm_host->aspace = NULL;
1210 if (msm_host->tx_buf)
1211 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1212 msm_host->tx_buf_paddr);
1215 void *dsi_tx_buf_get_6g(struct msm_dsi_host *msm_host)
1217 return msm_gem_get_vaddr(msm_host->tx_gem_obj);
1220 void *dsi_tx_buf_get_v2(struct msm_dsi_host *msm_host)
1222 return msm_host->tx_buf;
1225 void dsi_tx_buf_put_6g(struct msm_dsi_host *msm_host)
1227 msm_gem_put_vaddr(msm_host->tx_gem_obj);
1231 * prepare cmd buffer to be txed
1233 static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1234 const struct mipi_dsi_msg *msg)
1236 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1237 struct mipi_dsi_packet packet;
1242 ret = mipi_dsi_create_packet(&packet, msg);
1244 pr_err("%s: create packet failed, %d\n", __func__, ret);
1247 len = (packet.size + 3) & (~0x3);
1249 if (len > msm_host->tx_size) {
1250 pr_err("%s: packet size is too big\n", __func__);
1254 data = cfg_hnd->ops->tx_buf_get(msm_host);
1256 ret = PTR_ERR(data);
1257 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1261 /* MSM specific command format in memory */
1262 data[0] = packet.header[1];
1263 data[1] = packet.header[2];
1264 data[2] = packet.header[0];
1265 data[3] = BIT(7); /* Last packet */
1266 if (mipi_dsi_packet_format_is_long(msg->type))
1268 if (msg->rx_buf && msg->rx_len)
1272 if (packet.payload && packet.payload_length)
1273 memcpy(data + 4, packet.payload, packet.payload_length);
1275 /* Append 0xff to the end */
1276 if (packet.size < len)
1277 memset(data + packet.size, 0xff, len - packet.size);
1279 if (cfg_hnd->ops->tx_buf_put)
1280 cfg_hnd->ops->tx_buf_put(msm_host);
1286 * dsi_short_read1_resp: 1 parameter
1288 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1290 u8 *data = msg->rx_buf;
1291 if (data && (msg->rx_len >= 1)) {
1292 *data = buf[1]; /* strip out dcs type */
1295 pr_err("%s: read data does not match with rx_buf len %zu\n",
1296 __func__, msg->rx_len);
1302 * dsi_short_read2_resp: 2 parameter
1304 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1306 u8 *data = msg->rx_buf;
1307 if (data && (msg->rx_len >= 2)) {
1308 data[0] = buf[1]; /* strip out dcs type */
1312 pr_err("%s: read data does not match with rx_buf len %zu\n",
1313 __func__, msg->rx_len);
1318 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1320 /* strip out 4 byte dcs header */
1321 if (msg->rx_buf && msg->rx_len)
1322 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1327 int dsi_dma_base_get_6g(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1329 struct drm_device *dev = msm_host->dev;
1330 struct msm_drm_private *priv = dev->dev_private;
1335 return msm_gem_get_and_pin_iova(msm_host->tx_gem_obj,
1336 priv->kms->aspace, dma_base);
1339 int dsi_dma_base_get_v2(struct msm_dsi_host *msm_host, uint64_t *dma_base)
1344 *dma_base = msm_host->tx_buf_paddr;
1348 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1350 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1355 ret = cfg_hnd->ops->dma_base_get(msm_host, &dma_base);
1357 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1361 reinit_completion(&msm_host->dma_comp);
1363 dsi_wait4video_eng_busy(msm_host);
1365 triggered = msm_dsi_manager_cmd_xfer_trigger(
1366 msm_host->id, dma_base, len);
1368 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1369 msecs_to_jiffies(200));
1381 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1382 u8 *buf, int rx_byte, int pkt_size)
1388 int repeated_bytes = 0;
1389 int buf_offset = buf - msm_host->rx_buf;
1392 cnt = (rx_byte + 3) >> 2;
1394 cnt = 4; /* 4 x 32 bits registers only */
1399 read_cnt = pkt_size + 6;
1402 * In case of multiple reads from the panel, after the first read, there
1403 * is possibility that there are some bytes in the payload repeating in
1404 * the RDBK_DATA registers. Since we read all the parameters from the
1405 * panel right from the first byte for every pass. We need to skip the
1406 * repeating bytes and then append the new parameters to the rx buffer.
1408 if (read_cnt > 16) {
1410 /* Any data more than 16 bytes will be shifted out.
1411 * The temp read buffer should already contain these bytes.
1412 * The remaining bytes in read buffer are the repeated bytes.
1414 bytes_shifted = read_cnt - 16;
1415 repeated_bytes = buf_offset - bytes_shifted;
1418 for (i = cnt - 1; i >= 0; i--) {
1419 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1420 *temp++ = ntohl(data); /* to host byte order */
1421 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1424 for (i = repeated_bytes; i < 16; i++)
1430 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1431 const struct mipi_dsi_msg *msg)
1434 int bllp_len = msm_host->mode->hdisplay *
1435 mipi_dsi_pixel_format_to_bpp(msm_host->format) / 8;
1437 len = dsi_cmd_dma_add(msm_host, msg);
1439 pr_err("%s: failed to add cmd type = 0x%x\n",
1440 __func__, msg->type);
1444 /* for video mode, do not send cmds more than
1445 * one pixel line, since it only transmit it
1448 /* TODO: if the command is sent in LP mode, the bit rate is only
1449 * half of esc clk rate. In this case, if the video is already
1450 * actively streaming, we need to check more carefully if the
1451 * command can be fit into one BLLP.
1453 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1454 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1459 ret = dsi_cmd_dma_tx(msm_host, len);
1461 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d, ret=%d\n",
1462 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len, ret);
1464 } else if (ret < len) {
1465 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, ret=%d len=%d\n",
1466 __func__, msg->type, (*(u8 *)(msg->tx_buf)), ret, len);
1473 static void dsi_err_worker(struct work_struct *work)
1475 struct msm_dsi_host *msm_host =
1476 container_of(work, struct msm_dsi_host, err_work);
1477 u32 status = msm_host->err_work_state;
1479 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1480 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1481 dsi_sw_reset(msm_host);
1483 /* It is safe to clear here because error irq is disabled. */
1484 msm_host->err_work_state = 0;
1486 /* enable dsi error interrupt */
1487 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1490 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1494 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1497 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1498 /* Writing of an extra 0 needed to clear error bits */
1499 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1500 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1504 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1508 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1511 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1512 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1516 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1520 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1522 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1523 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1524 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1525 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1526 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1527 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1528 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1532 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1536 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1538 /* fifo underflow, overflow */
1540 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1541 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1542 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1543 msm_host->err_work_state |=
1544 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1548 static void dsi_status(struct msm_dsi_host *msm_host)
1552 status = dsi_read(msm_host, REG_DSI_STATUS0);
1554 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1555 dsi_write(msm_host, REG_DSI_STATUS0, status);
1556 msm_host->err_work_state |=
1557 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1561 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1565 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1567 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1568 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1569 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1573 static void dsi_error(struct msm_dsi_host *msm_host)
1575 /* disable dsi error interrupt */
1576 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1578 dsi_clk_status(msm_host);
1579 dsi_fifo_status(msm_host);
1580 dsi_ack_err_status(msm_host);
1581 dsi_timeout_status(msm_host);
1582 dsi_status(msm_host);
1583 dsi_dln0_phy_err(msm_host);
1585 queue_work(msm_host->workqueue, &msm_host->err_work);
1588 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1590 struct msm_dsi_host *msm_host = ptr;
1592 unsigned long flags;
1594 if (!msm_host->ctrl_base)
1597 spin_lock_irqsave(&msm_host->intr_lock, flags);
1598 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1599 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1600 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1602 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1604 if (isr & DSI_IRQ_ERROR)
1605 dsi_error(msm_host);
1607 if (isr & DSI_IRQ_VIDEO_DONE)
1608 complete(&msm_host->video_comp);
1610 if (isr & DSI_IRQ_CMD_DMA_DONE)
1611 complete(&msm_host->dma_comp);
1616 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1617 struct device *panel_device)
1619 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1622 if (IS_ERR(msm_host->disp_en_gpio)) {
1623 DBG("cannot get disp-enable-gpios %ld",
1624 PTR_ERR(msm_host->disp_en_gpio));
1625 return PTR_ERR(msm_host->disp_en_gpio);
1628 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1630 if (IS_ERR(msm_host->te_gpio)) {
1631 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1632 return PTR_ERR(msm_host->te_gpio);
1638 static int dsi_host_attach(struct mipi_dsi_host *host,
1639 struct mipi_dsi_device *dsi)
1641 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1644 if (dsi->lanes > msm_host->num_data_lanes)
1647 msm_host->channel = dsi->channel;
1648 msm_host->lanes = dsi->lanes;
1649 msm_host->format = dsi->format;
1650 msm_host->mode_flags = dsi->mode_flags;
1652 msm_host->dsc = dsi->dsc;
1654 /* Some gpios defined in panel DT need to be controlled by host */
1655 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1659 ret = dsi_dev_attach(msm_host->pdev);
1663 DBG("id=%d", msm_host->id);
1668 static int dsi_host_detach(struct mipi_dsi_host *host,
1669 struct mipi_dsi_device *dsi)
1671 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1673 dsi_dev_detach(msm_host->pdev);
1675 DBG("id=%d", msm_host->id);
1680 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1681 const struct mipi_dsi_msg *msg)
1683 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1686 if (!msg || !msm_host->power_on)
1689 mutex_lock(&msm_host->cmd_mutex);
1690 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1691 mutex_unlock(&msm_host->cmd_mutex);
1696 static const struct mipi_dsi_host_ops dsi_host_ops = {
1697 .attach = dsi_host_attach,
1698 .detach = dsi_host_detach,
1699 .transfer = dsi_host_transfer,
1703 * List of supported physical to logical lane mappings.
1704 * For example, the 2nd entry represents the following mapping:
1706 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1708 static const int supported_data_lane_swaps[][4] = {
1719 static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1720 struct device_node *ep)
1722 struct device *dev = &msm_host->pdev->dev;
1723 struct property *prop;
1725 int ret, i, len, num_lanes;
1727 prop = of_find_property(ep, "data-lanes", &len);
1730 "failed to find data lane mapping, using default\n");
1731 /* Set the number of date lanes to 4 by default. */
1732 msm_host->num_data_lanes = 4;
1736 num_lanes = drm_of_get_data_lanes_count(ep, 1, 4);
1737 if (num_lanes < 0) {
1738 DRM_DEV_ERROR(dev, "bad number of data lanes\n");
1742 msm_host->num_data_lanes = num_lanes;
1744 ret = of_property_read_u32_array(ep, "data-lanes", lane_map,
1747 DRM_DEV_ERROR(dev, "failed to read lane data\n");
1752 * compare DT specified physical-logical lane mappings with the ones
1753 * supported by hardware
1755 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1756 const int *swap = supported_data_lane_swaps[i];
1760 * the data-lanes array we get from DT has a logical->physical
1761 * mapping. The "data lane swap" register field represents
1762 * supported configurations in a physical->logical mapping.
1763 * Translate the DT mapping to what we understand and find a
1764 * configuration that works.
1766 for (j = 0; j < num_lanes; j++) {
1767 if (lane_map[j] < 0 || lane_map[j] > 3)
1768 DRM_DEV_ERROR(dev, "bad physical lane entry %u\n",
1771 if (swap[lane_map[j]] != j)
1775 if (j == num_lanes) {
1776 msm_host->dlane_swap = i;
1784 static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc_config *dsc)
1788 if (dsc->bits_per_pixel & 0xf) {
1789 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support fractional bits_per_pixel\n");
1793 if (dsc->bits_per_component != 8) {
1794 DRM_DEV_ERROR(&msm_host->pdev->dev, "DSI does not support bits_per_component != 8 yet\n");
1798 dsc->simple_422 = 0;
1799 dsc->convert_rgb = 1;
1800 dsc->vbr_enable = 0;
1802 drm_dsc_set_const_params(dsc);
1803 drm_dsc_set_rc_buf_thresh(dsc);
1805 /* handle only bpp = bpc = 8, pre-SCR panels */
1806 ret = drm_dsc_setup_rc_params(dsc, DRM_DSC_1_1_PRE_SCR);
1808 DRM_DEV_ERROR(&msm_host->pdev->dev, "could not find DSC RC parameters\n");
1812 dsc->initial_scale_value = drm_dsc_initial_scale_value(dsc);
1813 dsc->line_buf_depth = dsc->bits_per_component + 1;
1815 return drm_dsc_compute_rc_parameters(dsc);
1818 static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1820 struct device *dev = &msm_host->pdev->dev;
1821 struct device_node *np = dev->of_node;
1822 struct device_node *endpoint;
1826 * Get the endpoint of the output port of the DSI host. In our case,
1827 * this is mapped to port number with reg = 1. Don't return an error if
1828 * the remote endpoint isn't defined. It's possible that there is
1829 * nothing connected to the dsi output.
1831 endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
1833 DRM_DEV_DEBUG(dev, "%s: no endpoint\n", __func__);
1837 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1839 DRM_DEV_ERROR(dev, "%s: invalid lane configuration %d\n",
1845 if (of_property_read_bool(np, "syscon-sfpb")) {
1846 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1848 if (IS_ERR(msm_host->sfpb)) {
1849 DRM_DEV_ERROR(dev, "%s: failed to get sfpb regmap\n",
1851 ret = PTR_ERR(msm_host->sfpb);
1856 of_node_put(endpoint);
1861 static int dsi_host_get_id(struct msm_dsi_host *msm_host)
1863 struct platform_device *pdev = msm_host->pdev;
1864 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
1865 struct resource *res;
1868 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_ctrl");
1872 for (i = 0; i < VARIANTS_MAX; i++)
1873 for (j = 0; j < DSI_MAX; j++)
1874 if (cfg->io_start[i][j] == res->start)
1880 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1882 struct msm_dsi_host *msm_host = NULL;
1883 struct platform_device *pdev = msm_dsi->pdev;
1884 const struct msm_dsi_config *cfg;
1887 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1892 msm_host->pdev = pdev;
1893 msm_dsi->host = &msm_host->base;
1895 ret = dsi_host_parse_dt(msm_host);
1897 pr_err("%s: failed to parse dt\n", __func__);
1901 msm_host->ctrl_base = msm_ioremap_size(pdev, "dsi_ctrl", &msm_host->ctrl_size);
1902 if (IS_ERR(msm_host->ctrl_base)) {
1903 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1904 return PTR_ERR(msm_host->ctrl_base);
1907 pm_runtime_enable(&pdev->dev);
1909 msm_host->cfg_hnd = dsi_get_config(msm_host);
1910 if (!msm_host->cfg_hnd) {
1911 pr_err("%s: get config failed\n", __func__);
1914 cfg = msm_host->cfg_hnd->cfg;
1916 msm_host->id = dsi_host_get_id(msm_host);
1917 if (msm_host->id < 0) {
1918 pr_err("%s: unable to identify DSI host index\n", __func__);
1919 return msm_host->id;
1922 /* fixup base address by io offset */
1923 msm_host->ctrl_base += cfg->io_offset;
1925 ret = devm_regulator_bulk_get_const(&pdev->dev, cfg->num_regulators,
1926 cfg->regulator_data,
1927 &msm_host->supplies);
1931 ret = dsi_clk_init(msm_host);
1933 pr_err("%s: unable to initialize dsi clks\n", __func__);
1937 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1938 if (!msm_host->rx_buf) {
1939 pr_err("%s: alloc rx temp buf failed\n", __func__);
1943 ret = devm_pm_opp_set_clkname(&pdev->dev, "byte");
1946 /* OPP table is optional */
1947 ret = devm_pm_opp_of_add_table(&pdev->dev);
1948 if (ret && ret != -ENODEV) {
1949 dev_err(&pdev->dev, "invalid OPP table in device tree\n");
1953 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1954 if (!msm_host->irq) {
1955 dev_err(&pdev->dev, "failed to get irq\n");
1959 /* do not autoenable, will be enabled later */
1960 ret = devm_request_irq(&pdev->dev, msm_host->irq, dsi_host_irq,
1961 IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
1962 "dsi_isr", msm_host);
1964 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1965 msm_host->irq, ret);
1969 init_completion(&msm_host->dma_comp);
1970 init_completion(&msm_host->video_comp);
1971 mutex_init(&msm_host->dev_mutex);
1972 mutex_init(&msm_host->cmd_mutex);
1973 spin_lock_init(&msm_host->intr_lock);
1975 /* setup workqueue */
1976 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1977 if (!msm_host->workqueue)
1980 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1982 msm_dsi->id = msm_host->id;
1984 DBG("Dsi Host %d initialized", msm_host->id);
1988 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1990 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1993 if (msm_host->workqueue) {
1994 destroy_workqueue(msm_host->workqueue);
1995 msm_host->workqueue = NULL;
1998 mutex_destroy(&msm_host->cmd_mutex);
1999 mutex_destroy(&msm_host->dev_mutex);
2001 pm_runtime_disable(&msm_host->pdev->dev);
2004 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
2005 struct drm_device *dev)
2007 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2008 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2011 msm_host->dev = dev;
2013 ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
2015 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
2022 int msm_dsi_host_register(struct mipi_dsi_host *host)
2024 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2027 /* Register mipi dsi host */
2028 if (!msm_host->registered) {
2029 host->dev = &msm_host->pdev->dev;
2030 host->ops = &dsi_host_ops;
2031 ret = mipi_dsi_host_register(host);
2035 msm_host->registered = true;
2041 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
2043 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2045 if (msm_host->registered) {
2046 mipi_dsi_host_unregister(host);
2049 msm_host->registered = false;
2053 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
2054 const struct mipi_dsi_msg *msg)
2056 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2057 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2059 /* TODO: make sure dsi_cmd_mdp is idle.
2060 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
2061 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
2062 * How to handle the old versions? Wait for mdp cmd done?
2066 * mdss interrupt is generated in mdp core clock domain
2067 * mdp clock need to be enabled to receive dsi interrupt
2069 pm_runtime_get_sync(&msm_host->pdev->dev);
2070 cfg_hnd->ops->link_clk_set_rate(msm_host);
2071 cfg_hnd->ops->link_clk_enable(msm_host);
2073 /* TODO: vote for bus bandwidth */
2075 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2076 dsi_set_tx_power_mode(0, msm_host);
2078 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
2079 dsi_write(msm_host, REG_DSI_CTRL,
2080 msm_host->dma_cmd_ctrl_restore |
2081 DSI_CTRL_CMD_MODE_EN |
2083 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
2088 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
2089 const struct mipi_dsi_msg *msg)
2091 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2092 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2094 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
2095 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
2097 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
2098 dsi_set_tx_power_mode(1, msm_host);
2100 /* TODO: unvote for bus bandwidth */
2102 cfg_hnd->ops->link_clk_disable(msm_host);
2103 pm_runtime_put(&msm_host->pdev->dev);
2106 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
2107 const struct mipi_dsi_msg *msg)
2109 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2111 return dsi_cmds2buf_tx(msm_host, msg);
2114 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
2115 const struct mipi_dsi_msg *msg)
2117 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2118 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2119 int data_byte, rx_byte, dlen, end;
2120 int short_response, diff, pkt_size, ret = 0;
2122 int rlen = msg->rx_len;
2131 data_byte = 10; /* first read */
2132 if (rlen < data_byte)
2135 pkt_size = data_byte;
2136 rx_byte = data_byte + 6; /* 4 header + 2 crc */
2139 buf = msm_host->rx_buf;
2142 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
2143 struct mipi_dsi_msg max_pkt_size_msg = {
2144 .channel = msg->channel,
2145 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
2150 DBG("rlen=%d pkt_size=%d rx_byte=%d",
2151 rlen, pkt_size, rx_byte);
2153 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
2155 pr_err("%s: Set max pkt size failed, %d\n",
2160 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
2161 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
2162 /* Clear the RDBK_DATA registers */
2163 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
2164 DSI_RDBK_DATA_CTRL_CLR);
2165 wmb(); /* make sure the RDBK registers are cleared */
2166 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
2167 wmb(); /* release cleared status before transfer */
2170 ret = dsi_cmds2buf_tx(msm_host, msg);
2172 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
2174 } else if (ret < msg->tx_len) {
2175 pr_err("%s: Read cmd Tx failed, too short: %d\n", __func__, ret);
2180 * once cmd_dma_done interrupt received,
2181 * return data from client is ready and stored
2182 * at RDBK_DATA register already
2183 * since rx fifo is 16 bytes, dcs header is kept at first loop,
2184 * after that dcs header lost during shift into registers
2186 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
2194 if (rlen <= data_byte) {
2195 diff = data_byte - rlen;
2203 dlen -= 2; /* 2 crc */
2205 buf += dlen; /* next start position */
2206 data_byte = 14; /* NOT first read */
2207 if (rlen < data_byte)
2210 pkt_size += data_byte;
2211 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
2216 * For single Long read, if the requested rlen < 10,
2217 * we need to shift the start position of rx
2218 * data buffer to skip the bytes which are not
2221 if (pkt_size < 10 && !short_response)
2222 buf = msm_host->rx_buf + (10 - rlen);
2224 buf = msm_host->rx_buf;
2228 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2229 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2232 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2233 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2234 ret = dsi_short_read1_resp(buf, msg);
2236 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2237 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2238 ret = dsi_short_read2_resp(buf, msg);
2240 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2241 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2242 ret = dsi_long_read_resp(buf, msg);
2245 pr_warn("%s:Invalid response cmd\n", __func__);
2252 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2255 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2257 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2258 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2259 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2261 /* Make sure trigger happens */
2265 void msm_dsi_host_set_phy_mode(struct mipi_dsi_host *host,
2266 struct msm_dsi_phy *src_phy)
2268 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2270 msm_host->cphy_mode = src_phy->cphy_mode;
2273 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host)
2275 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2278 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
2279 /* Make sure fully reset */
2282 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
2286 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
2287 struct msm_dsi_phy_clk_request *clk_req,
2290 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2291 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2294 ret = cfg_hnd->ops->calc_clk_rate(msm_host, is_bonded_dsi);
2296 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2300 /* CPHY transmits 16 bits over 7 clock cycles
2301 * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
2302 * so multiply by 7 to get the "bitclk rate"
2304 if (msm_host->cphy_mode)
2305 clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
2307 clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
2308 clk_req->escclk_rate = msm_host->esc_clk_rate;
2311 void msm_dsi_host_enable_irq(struct mipi_dsi_host *host)
2313 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2315 enable_irq(msm_host->irq);
2318 void msm_dsi_host_disable_irq(struct mipi_dsi_host *host)
2320 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2322 disable_irq(msm_host->irq);
2325 int msm_dsi_host_enable(struct mipi_dsi_host *host)
2327 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2329 dsi_op_mode_config(msm_host,
2330 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2332 /* TODO: clock should be turned off for command mode,
2333 * and only turned on before MDP START.
2334 * This part of code should be enabled once mdp driver support it.
2336 /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
2337 * dsi_link_clk_disable(msm_host);
2338 * pm_runtime_put(&msm_host->pdev->dev);
2341 msm_host->enabled = true;
2345 int msm_dsi_host_disable(struct mipi_dsi_host *host)
2347 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2349 msm_host->enabled = false;
2350 dsi_op_mode_config(msm_host,
2351 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2353 /* Since we have disabled INTF, the video engine won't stop so that
2354 * the cmd engine will be blocked.
2355 * Reset to disable video engine so that we can send off cmd.
2357 dsi_sw_reset(msm_host);
2362 static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2364 enum sfpb_ahb_arb_master_port_en en;
2366 if (!msm_host->sfpb)
2369 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2371 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2372 SFPB_GPREG_MASTER_PORT_EN__MASK,
2373 SFPB_GPREG_MASTER_PORT_EN(en));
2376 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
2377 struct msm_dsi_phy_shared_timings *phy_shared_timings,
2378 bool is_bonded_dsi, struct msm_dsi_phy *phy)
2380 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2381 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2384 mutex_lock(&msm_host->dev_mutex);
2385 if (msm_host->power_on) {
2386 DBG("dsi host already on");
2390 msm_host->byte_intf_clk_rate = msm_host->byte_clk_rate;
2391 if (phy_shared_timings->byte_intf_clk_div_2)
2392 msm_host->byte_intf_clk_rate /= 2;
2394 msm_dsi_sfpb_config(msm_host, true);
2396 ret = regulator_bulk_enable(msm_host->cfg_hnd->cfg->num_regulators,
2397 msm_host->supplies);
2399 pr_err("%s:Failed to enable vregs.ret=%d\n",
2404 pm_runtime_get_sync(&msm_host->pdev->dev);
2405 ret = cfg_hnd->ops->link_clk_set_rate(msm_host);
2407 ret = cfg_hnd->ops->link_clk_enable(msm_host);
2409 pr_err("%s: failed to enable link clocks. ret=%d\n",
2411 goto fail_disable_reg;
2414 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2416 pr_err("%s: failed to set pinctrl default state, %d\n",
2418 goto fail_disable_clk;
2421 dsi_timing_setup(msm_host, is_bonded_dsi);
2422 dsi_sw_reset(msm_host);
2423 dsi_ctrl_enable(msm_host, phy_shared_timings, phy);
2425 if (msm_host->disp_en_gpio)
2426 gpiod_set_value(msm_host->disp_en_gpio, 1);
2428 msm_host->power_on = true;
2429 mutex_unlock(&msm_host->dev_mutex);
2434 cfg_hnd->ops->link_clk_disable(msm_host);
2435 pm_runtime_put(&msm_host->pdev->dev);
2437 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2438 msm_host->supplies);
2440 mutex_unlock(&msm_host->dev_mutex);
2444 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2446 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2447 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2449 mutex_lock(&msm_host->dev_mutex);
2450 if (!msm_host->power_on) {
2451 DBG("dsi host already off");
2455 dsi_ctrl_disable(msm_host);
2457 if (msm_host->disp_en_gpio)
2458 gpiod_set_value(msm_host->disp_en_gpio, 0);
2460 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2462 cfg_hnd->ops->link_clk_disable(msm_host);
2463 pm_runtime_put(&msm_host->pdev->dev);
2465 regulator_bulk_disable(msm_host->cfg_hnd->cfg->num_regulators,
2466 msm_host->supplies);
2468 msm_dsi_sfpb_config(msm_host, false);
2472 msm_host->power_on = false;
2475 mutex_unlock(&msm_host->dev_mutex);
2479 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2480 const struct drm_display_mode *mode)
2482 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2484 if (msm_host->mode) {
2485 drm_mode_destroy(msm_host->dev, msm_host->mode);
2486 msm_host->mode = NULL;
2489 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2490 if (!msm_host->mode) {
2491 pr_err("%s: cannot duplicate mode\n", __func__);
2498 enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
2499 const struct drm_display_mode *mode)
2501 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2502 struct drm_dsc_config *dsc = msm_host->dsc;
2503 int pic_width = mode->hdisplay;
2504 int pic_height = mode->vdisplay;
2509 if (pic_width % dsc->slice_width) {
2510 pr_err("DSI: pic_width %d has to be multiple of slice %d\n",
2511 pic_width, dsc->slice_width);
2512 return MODE_H_ILLEGAL;
2515 if (pic_height % dsc->slice_height) {
2516 pr_err("DSI: pic_height %d has to be multiple of slice %d\n",
2517 pic_height, dsc->slice_height);
2518 return MODE_V_ILLEGAL;
2524 unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
2526 return to_msm_dsi_host(host)->mode_flags;
2529 void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
2531 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2533 pm_runtime_get_sync(&msm_host->pdev->dev);
2535 msm_disp_snapshot_add_block(disp_state, msm_host->ctrl_size,
2536 msm_host->ctrl_base, "dsi%d_ctrl", msm_host->id);
2538 pm_runtime_put_sync(&msm_host->pdev->dev);
2541 static void msm_dsi_host_video_test_pattern_setup(struct msm_dsi_host *msm_host)
2545 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2547 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_VIDEO_INIT_VAL, 0xff);
2548 /* draw checkered rectangle pattern */
2549 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL,
2550 DSI_TPG_MAIN_CONTROL_CHECKERED_RECTANGLE_PATTERN);
2551 /* use 24-bit RGB test pttern */
2552 dsi_write(msm_host, REG_DSI_TPG_VIDEO_CONFIG,
2553 DSI_TPG_VIDEO_CONFIG_BPP(VIDEO_CONFIG_24BPP) |
2554 DSI_TPG_VIDEO_CONFIG_RGB);
2556 reg |= DSI_TEST_PATTERN_GEN_CTRL_VIDEO_PATTERN_SEL(VID_MDSS_GENERAL_PATTERN);
2557 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2559 DBG("Video test pattern setup done\n");
2562 static void msm_dsi_host_cmd_test_pattern_setup(struct msm_dsi_host *msm_host)
2566 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2568 /* initial value for test pattern */
2569 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_MDP_INIT_VAL0, 0xff);
2571 reg |= DSI_TEST_PATTERN_GEN_CTRL_CMD_MDP_STREAM0_PATTERN_SEL(CMD_MDP_MDSS_GENERAL_PATTERN);
2573 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, reg);
2574 /* draw checkered rectangle pattern */
2575 dsi_write(msm_host, REG_DSI_TPG_MAIN_CONTROL2,
2576 DSI_TPG_MAIN_CONTROL2_CMD_MDP0_CHECKERED_RECTANGLE_PATTERN);
2578 DBG("Cmd test pattern setup done\n");
2581 void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host)
2583 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2584 bool is_video_mode = !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO);
2588 msm_dsi_host_video_test_pattern_setup(msm_host);
2590 msm_dsi_host_cmd_test_pattern_setup(msm_host);
2592 reg = dsi_read(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL);
2593 /* enable the test pattern generator */
2594 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CTRL, (reg | DSI_TEST_PATTERN_GEN_CTRL_EN));
2596 /* for command mode need to trigger one frame from tpg */
2598 dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER,
2599 DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER_SW_TRIGGER);
2602 struct drm_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host)
2604 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2606 return msm_host->dsc;