2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/interrupt.h>
19 #include <linux/of_device.h>
20 #include <linux/of_gpio.h>
21 #include <linux/of_irq.h>
22 #include <linux/regulator/consumer.h>
23 #include <linux/spinlock.h>
24 #include <video/mipi_display.h>
29 #define MSM_DSI_VER_MAJOR_V2 0x02
30 #define MSM_DSI_VER_MAJOR_6G 0x03
31 #define MSM_DSI_6G_VER_MINOR_V1_0 0x10000000
32 #define MSM_DSI_6G_VER_MINOR_V1_1 0x10010000
33 #define MSM_DSI_6G_VER_MINOR_V1_1_1 0x10010001
34 #define MSM_DSI_6G_VER_MINOR_V1_2 0x10020000
35 #define MSM_DSI_6G_VER_MINOR_V1_3_1 0x10030001
37 #define DSI_6G_REG_SHIFT 4
39 #define DSI_REGULATOR_MAX 8
40 struct dsi_reg_entry {
48 struct dsi_reg_config {
50 struct dsi_reg_entry regs[DSI_REGULATOR_MAX];
57 enum msm_dsi_phy_type phy_type;
58 struct dsi_reg_config reg_cfg;
61 static const struct dsi_config dsi_cfgs[] = {
62 {MSM_DSI_VER_MAJOR_V2, 0, 0, MSM_DSI_PHY_UNKNOWN},
64 .major = MSM_DSI_VER_MAJOR_6G,
65 .minor = MSM_DSI_6G_VER_MINOR_V1_0,
66 .io_offset = DSI_6G_REG_SHIFT,
67 .phy_type = MSM_DSI_PHY_28NM,
71 {"gdsc", -1, -1, -1, -1},
72 {"vdd", 3000000, 3000000, 150000, 100},
73 {"vdda", 1200000, 1200000, 100000, 100},
74 {"vddio", 1800000, 1800000, 100000, 100},
79 .major = MSM_DSI_VER_MAJOR_6G,
80 .minor = MSM_DSI_6G_VER_MINOR_V1_1,
81 .io_offset = DSI_6G_REG_SHIFT,
82 .phy_type = MSM_DSI_PHY_28NM,
86 {"gdsc", -1, -1, -1, -1},
87 {"vdd", 3000000, 3000000, 150000, 100},
88 {"vdda", 1200000, 1200000, 100000, 100},
89 {"vddio", 1800000, 1800000, 100000, 100},
94 .major = MSM_DSI_VER_MAJOR_6G,
95 .minor = MSM_DSI_6G_VER_MINOR_V1_1_1,
96 .io_offset = DSI_6G_REG_SHIFT,
97 .phy_type = MSM_DSI_PHY_28NM,
101 {"gdsc", -1, -1, -1, -1},
102 {"vdd", 3000000, 3000000, 150000, 100},
103 {"vdda", 1200000, 1200000, 100000, 100},
104 {"vddio", 1800000, 1800000, 100000, 100},
109 .major = MSM_DSI_VER_MAJOR_6G,
110 .minor = MSM_DSI_6G_VER_MINOR_V1_2,
111 .io_offset = DSI_6G_REG_SHIFT,
112 .phy_type = MSM_DSI_PHY_28NM,
116 {"gdsc", -1, -1, -1, -1},
117 {"vdd", 3000000, 3000000, 150000, 100},
118 {"vdda", 1200000, 1200000, 100000, 100},
119 {"vddio", 1800000, 1800000, 100000, 100},
124 .major = MSM_DSI_VER_MAJOR_6G,
125 .minor = MSM_DSI_6G_VER_MINOR_V1_3_1,
126 .io_offset = DSI_6G_REG_SHIFT,
127 .phy_type = MSM_DSI_PHY_28NM,
131 {"gdsc", -1, -1, -1, -1},
132 {"vdd", 2850000, 2850000, 100000, 100},
133 {"vdda", 1200000, 1200000, 100000, 100},
134 {"vddio", 1800000, 1800000, 100000, 100},
140 static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
145 if (!major || !minor)
148 /* From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
149 * makes all other registers 4-byte shifted down.
151 ver_6g = msm_readl(base + REG_DSI_6G_HW_VERSION);
153 ver = msm_readl(base + REG_DSI_VERSION);
154 ver = FIELD(ver, DSI_VERSION_MAJOR);
155 if (ver <= MSM_DSI_VER_MAJOR_V2) {
164 ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
165 ver = FIELD(ver, DSI_VERSION_MAJOR);
166 if (ver == MSM_DSI_VER_MAJOR_6G) {
177 #define DSI_ERR_STATE_ACK 0x0000
178 #define DSI_ERR_STATE_TIMEOUT 0x0001
179 #define DSI_ERR_STATE_DLN0_PHY 0x0002
180 #define DSI_ERR_STATE_FIFO 0x0004
181 #define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
182 #define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
183 #define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
185 #define DSI_CLK_CTRL_ENABLE_CLKS \
186 (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
187 DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
188 DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
189 DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
191 struct msm_dsi_host {
192 struct mipi_dsi_host base;
194 struct platform_device *pdev;
195 struct drm_device *dev;
199 void __iomem *ctrl_base;
200 struct regulator_bulk_data supplies[DSI_REGULATOR_MAX];
201 struct clk *mdp_core_clk;
204 struct clk *mmss_misc_ahb_clk;
205 struct clk *byte_clk;
207 struct clk *pixel_clk;
210 struct gpio_desc *disp_en_gpio;
211 struct gpio_desc *te_gpio;
213 const struct dsi_config *cfg;
215 struct completion dma_comp;
216 struct completion video_comp;
217 struct mutex dev_mutex;
218 struct mutex cmd_mutex;
219 struct mutex clk_mutex;
220 spinlock_t intr_lock; /* Protect interrupt ctrl register */
223 struct work_struct err_work;
224 struct workqueue_struct *workqueue;
226 struct drm_gem_object *tx_gem_obj;
229 struct drm_display_mode *mode;
232 struct device_node *panel_node;
233 unsigned int channel;
235 enum mipi_dsi_pixel_format format;
236 unsigned long mode_flags;
238 u32 dma_cmd_ctrl_restore;
245 static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
248 case MIPI_DSI_FMT_RGB565: return 16;
249 case MIPI_DSI_FMT_RGB666_PACKED: return 18;
250 case MIPI_DSI_FMT_RGB666:
251 case MIPI_DSI_FMT_RGB888:
256 static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
258 return msm_readl(msm_host->ctrl_base + msm_host->cfg->io_offset + reg);
260 static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
262 msm_writel(data, msm_host->ctrl_base + msm_host->cfg->io_offset + reg);
265 static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
266 static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
268 static const struct dsi_config *dsi_get_config(struct msm_dsi_host *msm_host)
270 const struct dsi_config *cfg;
271 struct regulator *gdsc_reg;
273 u32 major = 0, minor = 0;
275 gdsc_reg = regulator_get(&msm_host->pdev->dev, "gdsc");
276 if (IS_ERR_OR_NULL(gdsc_reg)) {
277 pr_err("%s: cannot get gdsc\n", __func__);
280 ret = regulator_enable(gdsc_reg);
282 pr_err("%s: unable to enable gdsc\n", __func__);
283 regulator_put(gdsc_reg);
286 ret = clk_prepare_enable(msm_host->ahb_clk);
288 pr_err("%s: unable to enable ahb_clk\n", __func__);
289 regulator_disable(gdsc_reg);
290 regulator_put(gdsc_reg);
294 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
296 clk_disable_unprepare(msm_host->ahb_clk);
297 regulator_disable(gdsc_reg);
298 regulator_put(gdsc_reg);
300 pr_err("%s: Invalid version\n", __func__);
304 for (i = 0; i < ARRAY_SIZE(dsi_cfgs); i++) {
306 if ((cfg->major == major) && (cfg->minor == minor))
309 pr_err("%s: Version %x:%x not support\n", __func__, major, minor);
315 static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
317 return container_of(host, struct msm_dsi_host, base);
320 static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
322 struct regulator_bulk_data *s = msm_host->supplies;
323 const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
324 int num = msm_host->cfg->reg_cfg.num;
328 for (i = num - 1; i >= 0; i--)
329 if (regs[i].disable_load >= 0)
330 regulator_set_load(s[i].consumer,
331 regs[i].disable_load);
333 regulator_bulk_disable(num, s);
336 static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
338 struct regulator_bulk_data *s = msm_host->supplies;
339 const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
340 int num = msm_host->cfg->reg_cfg.num;
344 for (i = 0; i < num; i++) {
345 if (regs[i].enable_load >= 0) {
346 ret = regulator_set_load(s[i].consumer,
347 regs[i].enable_load);
349 pr_err("regulator %d set op mode failed, %d\n",
356 ret = regulator_bulk_enable(num, s);
358 pr_err("regulator enable failed, %d\n", ret);
365 for (i--; i >= 0; i--)
366 regulator_set_load(s[i].consumer, regs[i].disable_load);
370 static int dsi_regulator_init(struct msm_dsi_host *msm_host)
372 struct regulator_bulk_data *s = msm_host->supplies;
373 const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
374 int num = msm_host->cfg->reg_cfg.num;
377 for (i = 0; i < num; i++)
378 s[i].supply = regs[i].name;
380 ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s);
382 pr_err("%s: failed to init regulator, ret=%d\n",
387 for (i = 0; i < num; i++) {
388 if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) {
389 ret = regulator_set_voltage(s[i].consumer,
390 regs[i].min_voltage, regs[i].max_voltage);
392 pr_err("regulator %d set voltage failed, %d\n",
402 static int dsi_clk_init(struct msm_dsi_host *msm_host)
404 struct device *dev = &msm_host->pdev->dev;
407 msm_host->mdp_core_clk = devm_clk_get(dev, "mdp_core_clk");
408 if (IS_ERR(msm_host->mdp_core_clk)) {
409 ret = PTR_ERR(msm_host->mdp_core_clk);
410 pr_err("%s: Unable to get mdp core clk. ret=%d\n",
415 msm_host->ahb_clk = devm_clk_get(dev, "iface_clk");
416 if (IS_ERR(msm_host->ahb_clk)) {
417 ret = PTR_ERR(msm_host->ahb_clk);
418 pr_err("%s: Unable to get mdss ahb clk. ret=%d\n",
423 msm_host->axi_clk = devm_clk_get(dev, "bus_clk");
424 if (IS_ERR(msm_host->axi_clk)) {
425 ret = PTR_ERR(msm_host->axi_clk);
426 pr_err("%s: Unable to get axi bus clk. ret=%d\n",
431 msm_host->mmss_misc_ahb_clk = devm_clk_get(dev, "core_mmss_clk");
432 if (IS_ERR(msm_host->mmss_misc_ahb_clk)) {
433 ret = PTR_ERR(msm_host->mmss_misc_ahb_clk);
434 pr_err("%s: Unable to get mmss misc ahb clk. ret=%d\n",
439 msm_host->byte_clk = devm_clk_get(dev, "byte_clk");
440 if (IS_ERR(msm_host->byte_clk)) {
441 ret = PTR_ERR(msm_host->byte_clk);
442 pr_err("%s: can't find dsi_byte_clk. ret=%d\n",
444 msm_host->byte_clk = NULL;
448 msm_host->pixel_clk = devm_clk_get(dev, "pixel_clk");
449 if (IS_ERR(msm_host->pixel_clk)) {
450 ret = PTR_ERR(msm_host->pixel_clk);
451 pr_err("%s: can't find dsi_pixel_clk. ret=%d\n",
453 msm_host->pixel_clk = NULL;
457 msm_host->esc_clk = devm_clk_get(dev, "core_clk");
458 if (IS_ERR(msm_host->esc_clk)) {
459 ret = PTR_ERR(msm_host->esc_clk);
460 pr_err("%s: can't find dsi_esc_clk. ret=%d\n",
462 msm_host->esc_clk = NULL;
470 static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
474 DBG("id=%d", msm_host->id);
476 ret = clk_prepare_enable(msm_host->mdp_core_clk);
478 pr_err("%s: failed to enable mdp_core_clock, %d\n",
483 ret = clk_prepare_enable(msm_host->ahb_clk);
485 pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret);
489 ret = clk_prepare_enable(msm_host->axi_clk);
491 pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret);
495 ret = clk_prepare_enable(msm_host->mmss_misc_ahb_clk);
497 pr_err("%s: failed to enable mmss misc ahb clk, %d\n",
499 goto misc_ahb_clk_err;
505 clk_disable_unprepare(msm_host->axi_clk);
507 clk_disable_unprepare(msm_host->ahb_clk);
509 clk_disable_unprepare(msm_host->mdp_core_clk);
514 static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
517 clk_disable_unprepare(msm_host->mmss_misc_ahb_clk);
518 clk_disable_unprepare(msm_host->axi_clk);
519 clk_disable_unprepare(msm_host->ahb_clk);
520 clk_disable_unprepare(msm_host->mdp_core_clk);
523 static int dsi_link_clk_enable(struct msm_dsi_host *msm_host)
527 DBG("Set clk rates: pclk=%d, byteclk=%d",
528 msm_host->mode->clock, msm_host->byte_clk_rate);
530 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
532 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
536 ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
538 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
542 ret = clk_prepare_enable(msm_host->esc_clk);
544 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
548 ret = clk_prepare_enable(msm_host->byte_clk);
550 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
554 ret = clk_prepare_enable(msm_host->pixel_clk);
556 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
563 clk_disable_unprepare(msm_host->byte_clk);
565 clk_disable_unprepare(msm_host->esc_clk);
570 static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
572 clk_disable_unprepare(msm_host->esc_clk);
573 clk_disable_unprepare(msm_host->pixel_clk);
574 clk_disable_unprepare(msm_host->byte_clk);
577 static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable)
581 mutex_lock(&msm_host->clk_mutex);
583 ret = dsi_bus_clk_enable(msm_host);
585 pr_err("%s: Can not enable bus clk, %d\n",
589 ret = dsi_link_clk_enable(msm_host);
591 pr_err("%s: Can not enable link clk, %d\n",
593 dsi_bus_clk_disable(msm_host);
597 dsi_link_clk_disable(msm_host);
598 dsi_bus_clk_disable(msm_host);
602 mutex_unlock(&msm_host->clk_mutex);
606 static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
608 struct drm_display_mode *mode = msm_host->mode;
609 u8 lanes = msm_host->lanes;
610 u32 bpp = dsi_get_bpp(msm_host->format);
614 pr_err("%s: mode not set\n", __func__);
618 pclk_rate = mode->clock * 1000;
620 msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
622 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
623 msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
626 DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
631 static void dsi_phy_sw_reset(struct msm_dsi_host *msm_host)
634 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
635 /* Make sure fully reset */
638 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
642 static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
647 spin_lock_irqsave(&msm_host->intr_lock, flags);
648 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
655 DBG("intr=%x enable=%d", intr, enable);
657 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
658 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
661 static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
663 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
665 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
666 return NON_BURST_SYNCH_PULSE;
668 return NON_BURST_SYNCH_EVENT;
671 static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
672 const enum mipi_dsi_pixel_format mipi_fmt)
675 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
676 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
677 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
678 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
679 default: return VID_DST_FORMAT_RGB888;
683 static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
684 const enum mipi_dsi_pixel_format mipi_fmt)
687 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
688 case MIPI_DSI_FMT_RGB666_PACKED:
689 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666;
690 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
691 default: return CMD_DST_FORMAT_RGB888;
695 static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
696 u32 clk_pre, u32 clk_post)
698 u32 flags = msm_host->mode_flags;
699 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
703 dsi_write(msm_host, REG_DSI_CTRL, 0);
707 if (flags & MIPI_DSI_MODE_VIDEO) {
708 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
709 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
710 if (flags & MIPI_DSI_MODE_VIDEO_HFP)
711 data |= DSI_VID_CFG0_HFP_POWER_STOP;
712 if (flags & MIPI_DSI_MODE_VIDEO_HBP)
713 data |= DSI_VID_CFG0_HBP_POWER_STOP;
714 if (flags & MIPI_DSI_MODE_VIDEO_HSA)
715 data |= DSI_VID_CFG0_HSA_POWER_STOP;
716 /* Always set low power stop mode for BLLP
717 * to let command engine send packets
719 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
720 DSI_VID_CFG0_BLLP_POWER_STOP;
721 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
722 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
723 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
724 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
726 /* Do not swap RGB colors */
727 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
728 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
730 /* Do not swap RGB colors */
731 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
732 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
733 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
735 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
736 DSI_CMD_CFG1_WR_MEM_CONTINUE(
737 MIPI_DCS_WRITE_MEMORY_CONTINUE);
738 /* Always insert DCS command */
739 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
740 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
743 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
744 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
745 DSI_CMD_DMA_CTRL_LOW_POWER);
748 /* Always assume dedicated TE pin */
749 data |= DSI_TRIG_CTRL_TE;
750 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
751 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
752 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
753 if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) &&
754 (msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
755 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
756 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
758 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(clk_post) |
759 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(clk_pre);
760 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
763 if (!(flags & MIPI_DSI_MODE_EOT_PACKET))
764 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
765 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
767 /* allow only ack-err-status to generate interrupt */
768 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
770 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
772 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
774 data = DSI_CTRL_CLK_EN;
776 DBG("lane number=%d", msm_host->lanes);
777 if (msm_host->lanes == 2) {
778 data |= DSI_CTRL_LANE1 | DSI_CTRL_LANE2;
779 /* swap lanes for 2-lane panel for better performance */
780 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
781 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_1230));
783 /* Take 4 lanes as default */
784 data |= DSI_CTRL_LANE0 | DSI_CTRL_LANE1 | DSI_CTRL_LANE2 |
786 /* Do not swap lanes for 4-lane panel */
787 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
788 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_0123));
790 data |= DSI_CTRL_ENABLE;
792 dsi_write(msm_host, REG_DSI_CTRL, data);
795 static void dsi_timing_setup(struct msm_dsi_host *msm_host)
797 struct drm_display_mode *mode = msm_host->mode;
798 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
799 u32 h_total = mode->htotal;
800 u32 v_total = mode->vtotal;
801 u32 hs_end = mode->hsync_end - mode->hsync_start;
802 u32 vs_end = mode->vsync_end - mode->vsync_start;
803 u32 ha_start = h_total - mode->hsync_start;
804 u32 ha_end = ha_start + mode->hdisplay;
805 u32 va_start = v_total - mode->vsync_start;
806 u32 va_end = va_start + mode->vdisplay;
811 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
812 dsi_write(msm_host, REG_DSI_ACTIVE_H,
813 DSI_ACTIVE_H_START(ha_start) |
814 DSI_ACTIVE_H_END(ha_end));
815 dsi_write(msm_host, REG_DSI_ACTIVE_V,
816 DSI_ACTIVE_V_START(va_start) |
817 DSI_ACTIVE_V_END(va_end));
818 dsi_write(msm_host, REG_DSI_TOTAL,
819 DSI_TOTAL_H_TOTAL(h_total - 1) |
820 DSI_TOTAL_V_TOTAL(v_total - 1));
822 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
823 DSI_ACTIVE_HSYNC_START(hs_start) |
824 DSI_ACTIVE_HSYNC_END(hs_end));
825 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
826 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
827 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
828 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
829 } else { /* command mode */
830 /* image data and 1 byte write_memory_start cmd */
831 wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
833 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL,
834 DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) |
835 DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL(
837 DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE(
838 MIPI_DSI_DCS_LONG_WRITE));
840 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL,
841 DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) |
842 DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay));
846 static void dsi_sw_reset(struct msm_dsi_host *msm_host)
848 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
849 wmb(); /* clocks need to be enabled before reset */
851 dsi_write(msm_host, REG_DSI_RESET, 1);
852 wmb(); /* make sure reset happen */
853 dsi_write(msm_host, REG_DSI_RESET, 0);
856 static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
857 bool video_mode, bool enable)
861 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
864 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
865 DSI_CTRL_CMD_MODE_EN);
866 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
867 DSI_IRQ_MASK_VIDEO_DONE, 0);
870 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
871 } else { /* command mode */
872 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
873 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
875 dsi_ctrl |= DSI_CTRL_ENABLE;
878 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
881 static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
885 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
888 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
890 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
892 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
895 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
897 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
899 reinit_completion(&msm_host->video_comp);
901 wait_for_completion_timeout(&msm_host->video_comp,
902 msecs_to_jiffies(70));
904 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
907 static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
909 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
912 if (msm_host->power_on) {
913 dsi_wait4video_done(msm_host);
914 /* delay 4 ms to skip BLLP */
915 usleep_range(2000, 4000);
920 static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
922 struct drm_device *dev = msm_host->dev;
926 mutex_lock(&dev->struct_mutex);
927 msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED);
928 if (IS_ERR(msm_host->tx_gem_obj)) {
929 ret = PTR_ERR(msm_host->tx_gem_obj);
930 pr_err("%s: failed to allocate gem, %d\n", __func__, ret);
931 msm_host->tx_gem_obj = NULL;
932 mutex_unlock(&dev->struct_mutex);
936 ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova);
938 pr_err("%s: failed to get iova, %d\n", __func__, ret);
941 mutex_unlock(&dev->struct_mutex);
944 pr_err("%s: buf NOT 8 bytes aligned\n", __func__);
951 static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
953 struct drm_device *dev = msm_host->dev;
955 if (msm_host->tx_gem_obj) {
956 msm_gem_put_iova(msm_host->tx_gem_obj, 0);
957 mutex_lock(&dev->struct_mutex);
958 msm_gem_free_object(msm_host->tx_gem_obj);
959 msm_host->tx_gem_obj = NULL;
960 mutex_unlock(&dev->struct_mutex);
965 * prepare cmd buffer to be txed
967 static int dsi_cmd_dma_add(struct drm_gem_object *tx_gem,
968 const struct mipi_dsi_msg *msg)
970 struct mipi_dsi_packet packet;
975 ret = mipi_dsi_create_packet(&packet, msg);
977 pr_err("%s: create packet failed, %d\n", __func__, ret);
980 len = (packet.size + 3) & (~0x3);
982 if (len > tx_gem->size) {
983 pr_err("%s: packet size is too big\n", __func__);
987 data = msm_gem_vaddr(tx_gem);
991 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
995 /* MSM specific command format in memory */
996 data[0] = packet.header[1];
997 data[1] = packet.header[2];
998 data[2] = packet.header[0];
999 data[3] = BIT(7); /* Last packet */
1000 if (mipi_dsi_packet_format_is_long(msg->type))
1002 if (msg->rx_buf && msg->rx_len)
1006 if (packet.payload && packet.payload_length)
1007 memcpy(data + 4, packet.payload, packet.payload_length);
1009 /* Append 0xff to the end */
1010 if (packet.size < len)
1011 memset(data + packet.size, 0xff, len - packet.size);
1017 * dsi_short_read1_resp: 1 parameter
1019 static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1021 u8 *data = msg->rx_buf;
1022 if (data && (msg->rx_len >= 1)) {
1023 *data = buf[1]; /* strip out dcs type */
1026 pr_err("%s: read data does not match with rx_buf len %zu\n",
1027 __func__, msg->rx_len);
1033 * dsi_short_read2_resp: 2 parameter
1035 static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1037 u8 *data = msg->rx_buf;
1038 if (data && (msg->rx_len >= 2)) {
1039 data[0] = buf[1]; /* strip out dcs type */
1043 pr_err("%s: read data does not match with rx_buf len %zu\n",
1044 __func__, msg->rx_len);
1049 static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1051 /* strip out 4 byte dcs header */
1052 if (msg->rx_buf && msg->rx_len)
1053 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1059 static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1065 ret = msm_gem_get_iova(msm_host->tx_gem_obj, 0, &iova);
1067 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1071 reinit_completion(&msm_host->dma_comp);
1073 dsi_wait4video_eng_busy(msm_host);
1075 triggered = msm_dsi_manager_cmd_xfer_trigger(
1076 msm_host->id, iova, len);
1078 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1079 msecs_to_jiffies(200));
1091 static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1092 u8 *buf, int rx_byte, int pkt_size)
1094 u32 *lp, *temp, data;
1098 int repeated_bytes = 0;
1099 int buf_offset = buf - msm_host->rx_buf;
1103 cnt = (rx_byte + 3) >> 2;
1105 cnt = 4; /* 4 x 32 bits registers only */
1110 read_cnt = pkt_size + 6;
1113 * In case of multiple reads from the panel, after the first read, there
1114 * is possibility that there are some bytes in the payload repeating in
1115 * the RDBK_DATA registers. Since we read all the parameters from the
1116 * panel right from the first byte for every pass. We need to skip the
1117 * repeating bytes and then append the new parameters to the rx buffer.
1119 if (read_cnt > 16) {
1121 /* Any data more than 16 bytes will be shifted out.
1122 * The temp read buffer should already contain these bytes.
1123 * The remaining bytes in read buffer are the repeated bytes.
1125 bytes_shifted = read_cnt - 16;
1126 repeated_bytes = buf_offset - bytes_shifted;
1129 for (i = cnt - 1; i >= 0; i--) {
1130 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1131 *temp++ = ntohl(data); /* to host byte order */
1132 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1135 for (i = repeated_bytes; i < 16; i++)
1141 static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1142 const struct mipi_dsi_msg *msg)
1145 int bllp_len = msm_host->mode->hdisplay *
1146 dsi_get_bpp(msm_host->format) / 8;
1148 len = dsi_cmd_dma_add(msm_host->tx_gem_obj, msg);
1150 pr_err("%s: failed to add cmd type = 0x%x\n",
1151 __func__, msg->type);
1155 /* for video mode, do not send cmds more than
1156 * one pixel line, since it only transmit it
1159 /* TODO: if the command is sent in LP mode, the bit rate is only
1160 * half of esc clk rate. In this case, if the video is already
1161 * actively streaming, we need to check more carefully if the
1162 * command can be fit into one BLLP.
1164 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1165 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1170 ret = dsi_cmd_dma_tx(msm_host, len);
1172 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n",
1173 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len);
1180 static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host)
1184 data0 = dsi_read(msm_host, REG_DSI_CTRL);
1186 data1 &= ~DSI_CTRL_ENABLE;
1187 dsi_write(msm_host, REG_DSI_CTRL, data1);
1189 * dsi controller need to be disabled before
1194 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1195 wmb(); /* make sure clocks enabled */
1197 /* dsi controller can only be reset while clocks are running */
1198 dsi_write(msm_host, REG_DSI_RESET, 1);
1199 wmb(); /* make sure reset happen */
1200 dsi_write(msm_host, REG_DSI_RESET, 0);
1201 wmb(); /* controller out of reset */
1202 dsi_write(msm_host, REG_DSI_CTRL, data0);
1203 wmb(); /* make sure dsi controller enabled again */
1206 static void dsi_err_worker(struct work_struct *work)
1208 struct msm_dsi_host *msm_host =
1209 container_of(work, struct msm_dsi_host, err_work);
1210 u32 status = msm_host->err_work_state;
1212 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1213 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1214 dsi_sw_reset_restore(msm_host);
1216 /* It is safe to clear here because error irq is disabled. */
1217 msm_host->err_work_state = 0;
1219 /* enable dsi error interrupt */
1220 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1223 static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1227 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1230 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1231 /* Writing of an extra 0 needed to clear error bits */
1232 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1233 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1237 static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1241 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1244 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1245 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1249 static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1253 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1256 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1257 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1261 static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1265 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1267 /* fifo underflow, overflow */
1269 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1270 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1271 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1272 msm_host->err_work_state |=
1273 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1277 static void dsi_status(struct msm_dsi_host *msm_host)
1281 status = dsi_read(msm_host, REG_DSI_STATUS0);
1283 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1284 dsi_write(msm_host, REG_DSI_STATUS0, status);
1285 msm_host->err_work_state |=
1286 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1290 static void dsi_clk_status(struct msm_dsi_host *msm_host)
1294 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1296 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1297 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1298 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1302 static void dsi_error(struct msm_dsi_host *msm_host)
1304 /* disable dsi error interrupt */
1305 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1307 dsi_clk_status(msm_host);
1308 dsi_fifo_status(msm_host);
1309 dsi_ack_err_status(msm_host);
1310 dsi_timeout_status(msm_host);
1311 dsi_status(msm_host);
1312 dsi_dln0_phy_err(msm_host);
1314 queue_work(msm_host->workqueue, &msm_host->err_work);
1317 static irqreturn_t dsi_host_irq(int irq, void *ptr)
1319 struct msm_dsi_host *msm_host = ptr;
1321 unsigned long flags;
1323 if (!msm_host->ctrl_base)
1326 spin_lock_irqsave(&msm_host->intr_lock, flags);
1327 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1328 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1329 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1331 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1333 if (isr & DSI_IRQ_ERROR)
1334 dsi_error(msm_host);
1336 if (isr & DSI_IRQ_VIDEO_DONE)
1337 complete(&msm_host->video_comp);
1339 if (isr & DSI_IRQ_CMD_DMA_DONE)
1340 complete(&msm_host->dma_comp);
1345 static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1346 struct device *panel_device)
1350 msm_host->disp_en_gpio = devm_gpiod_get(panel_device,
1352 if (IS_ERR(msm_host->disp_en_gpio)) {
1353 DBG("cannot get disp-enable-gpios %ld",
1354 PTR_ERR(msm_host->disp_en_gpio));
1355 msm_host->disp_en_gpio = NULL;
1357 if (msm_host->disp_en_gpio) {
1358 ret = gpiod_direction_output(msm_host->disp_en_gpio, 0);
1360 pr_err("cannot set dir to disp-en-gpios %d\n", ret);
1365 msm_host->te_gpio = devm_gpiod_get(panel_device, "disp-te");
1366 if (IS_ERR(msm_host->te_gpio)) {
1367 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1368 msm_host->te_gpio = NULL;
1371 if (msm_host->te_gpio) {
1372 ret = gpiod_direction_input(msm_host->te_gpio);
1374 pr_err("%s: cannot set dir to disp-te-gpios, %d\n",
1383 static int dsi_host_attach(struct mipi_dsi_host *host,
1384 struct mipi_dsi_device *dsi)
1386 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1389 msm_host->channel = dsi->channel;
1390 msm_host->lanes = dsi->lanes;
1391 msm_host->format = dsi->format;
1392 msm_host->mode_flags = dsi->mode_flags;
1394 msm_host->panel_node = dsi->dev.of_node;
1396 /* Some gpios defined in panel DT need to be controlled by host */
1397 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1401 DBG("id=%d", msm_host->id);
1403 drm_helper_hpd_irq_event(msm_host->dev);
1408 static int dsi_host_detach(struct mipi_dsi_host *host,
1409 struct mipi_dsi_device *dsi)
1411 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1413 msm_host->panel_node = NULL;
1415 DBG("id=%d", msm_host->id);
1417 drm_helper_hpd_irq_event(msm_host->dev);
1422 static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1423 const struct mipi_dsi_msg *msg)
1425 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1428 if (!msg || !msm_host->power_on)
1431 mutex_lock(&msm_host->cmd_mutex);
1432 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1433 mutex_unlock(&msm_host->cmd_mutex);
1438 static struct mipi_dsi_host_ops dsi_host_ops = {
1439 .attach = dsi_host_attach,
1440 .detach = dsi_host_detach,
1441 .transfer = dsi_host_transfer,
1444 int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1446 struct msm_dsi_host *msm_host = NULL;
1447 struct platform_device *pdev = msm_dsi->pdev;
1450 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1452 pr_err("%s: FAILED: cannot alloc dsi host\n",
1458 ret = of_property_read_u32(pdev->dev.of_node,
1459 "qcom,dsi-host-index", &msm_host->id);
1462 "%s: host index not specified, ret=%d\n",
1466 msm_host->pdev = pdev;
1468 ret = dsi_clk_init(msm_host);
1470 pr_err("%s: unable to initialize dsi clks\n", __func__);
1474 msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
1475 if (IS_ERR(msm_host->ctrl_base)) {
1476 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1477 ret = PTR_ERR(msm_host->ctrl_base);
1481 msm_host->cfg = dsi_get_config(msm_host);
1482 if (!msm_host->cfg) {
1484 pr_err("%s: get config failed\n", __func__);
1488 ret = dsi_regulator_init(msm_host);
1490 pr_err("%s: regulator init failed\n", __func__);
1494 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1495 if (!msm_host->rx_buf) {
1496 pr_err("%s: alloc rx temp buf failed\n", __func__);
1500 init_completion(&msm_host->dma_comp);
1501 init_completion(&msm_host->video_comp);
1502 mutex_init(&msm_host->dev_mutex);
1503 mutex_init(&msm_host->cmd_mutex);
1504 mutex_init(&msm_host->clk_mutex);
1505 spin_lock_init(&msm_host->intr_lock);
1507 /* setup workqueue */
1508 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1509 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1511 msm_dsi->phy = msm_dsi_phy_init(pdev, msm_host->cfg->phy_type,
1513 if (!msm_dsi->phy) {
1515 pr_err("%s: phy init failed\n", __func__);
1518 msm_dsi->host = &msm_host->base;
1519 msm_dsi->id = msm_host->id;
1521 DBG("Dsi Host %d initialized", msm_host->id);
1528 void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1530 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1533 dsi_tx_buf_free(msm_host);
1534 if (msm_host->workqueue) {
1535 flush_workqueue(msm_host->workqueue);
1536 destroy_workqueue(msm_host->workqueue);
1537 msm_host->workqueue = NULL;
1540 mutex_destroy(&msm_host->clk_mutex);
1541 mutex_destroy(&msm_host->cmd_mutex);
1542 mutex_destroy(&msm_host->dev_mutex);
1545 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
1546 struct drm_device *dev)
1548 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1549 struct platform_device *pdev = msm_host->pdev;
1552 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1553 if (msm_host->irq < 0) {
1554 ret = msm_host->irq;
1555 dev_err(dev->dev, "failed to get irq: %d\n", ret);
1559 ret = devm_request_irq(&pdev->dev, msm_host->irq,
1560 dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
1561 "dsi_isr", msm_host);
1563 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1564 msm_host->irq, ret);
1568 msm_host->dev = dev;
1569 ret = dsi_tx_buf_alloc(msm_host, SZ_4K);
1571 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
1578 int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
1580 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1581 struct device_node *node;
1584 /* Register mipi dsi host */
1585 if (!msm_host->registered) {
1586 host->dev = &msm_host->pdev->dev;
1587 host->ops = &dsi_host_ops;
1588 ret = mipi_dsi_host_register(host);
1592 msm_host->registered = true;
1594 /* If the panel driver has not been probed after host register,
1595 * we should defer the host's probe.
1596 * It makes sure panel is connected when fbcon detects
1597 * connector status and gets the proper display mode to
1598 * create framebuffer.
1601 node = of_get_child_by_name(msm_host->pdev->dev.of_node,
1604 if (!of_drm_find_panel(node))
1605 return -EPROBE_DEFER;
1613 void msm_dsi_host_unregister(struct mipi_dsi_host *host)
1615 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1617 if (msm_host->registered) {
1618 mipi_dsi_host_unregister(host);
1621 msm_host->registered = false;
1625 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
1626 const struct mipi_dsi_msg *msg)
1628 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1630 /* TODO: make sure dsi_cmd_mdp is idle.
1631 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
1632 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
1633 * How to handle the old versions? Wait for mdp cmd done?
1637 * mdss interrupt is generated in mdp core clock domain
1638 * mdp clock need to be enabled to receive dsi interrupt
1640 dsi_clk_ctrl(msm_host, 1);
1642 /* TODO: vote for bus bandwidth */
1644 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
1645 dsi_set_tx_power_mode(0, msm_host);
1647 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
1648 dsi_write(msm_host, REG_DSI_CTRL,
1649 msm_host->dma_cmd_ctrl_restore |
1650 DSI_CTRL_CMD_MODE_EN |
1652 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
1657 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
1658 const struct mipi_dsi_msg *msg)
1660 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1662 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
1663 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
1665 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
1666 dsi_set_tx_power_mode(1, msm_host);
1668 /* TODO: unvote for bus bandwidth */
1670 dsi_clk_ctrl(msm_host, 0);
1673 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
1674 const struct mipi_dsi_msg *msg)
1676 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1678 return dsi_cmds2buf_tx(msm_host, msg);
1681 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
1682 const struct mipi_dsi_msg *msg)
1684 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1685 int data_byte, rx_byte, dlen, end;
1686 int short_response, diff, pkt_size, ret = 0;
1688 int rlen = msg->rx_len;
1697 data_byte = 10; /* first read */
1698 if (rlen < data_byte)
1701 pkt_size = data_byte;
1702 rx_byte = data_byte + 6; /* 4 header + 2 crc */
1705 buf = msm_host->rx_buf;
1708 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
1709 struct mipi_dsi_msg max_pkt_size_msg = {
1710 .channel = msg->channel,
1711 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
1716 DBG("rlen=%d pkt_size=%d rx_byte=%d",
1717 rlen, pkt_size, rx_byte);
1719 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
1721 pr_err("%s: Set max pkt size failed, %d\n",
1726 if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) &&
1727 (msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
1728 /* Clear the RDBK_DATA registers */
1729 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
1730 DSI_RDBK_DATA_CTRL_CLR);
1731 wmb(); /* make sure the RDBK registers are cleared */
1732 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
1733 wmb(); /* release cleared status before transfer */
1736 ret = dsi_cmds2buf_tx(msm_host, msg);
1737 if (ret < msg->tx_len) {
1738 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
1743 * once cmd_dma_done interrupt received,
1744 * return data from client is ready and stored
1745 * at RDBK_DATA register already
1746 * since rx fifo is 16 bytes, dcs header is kept at first loop,
1747 * after that dcs header lost during shift into registers
1749 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
1757 if (rlen <= data_byte) {
1758 diff = data_byte - rlen;
1766 dlen -= 2; /* 2 crc */
1768 buf += dlen; /* next start position */
1769 data_byte = 14; /* NOT first read */
1770 if (rlen < data_byte)
1773 pkt_size += data_byte;
1774 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
1779 * For single Long read, if the requested rlen < 10,
1780 * we need to shift the start position of rx
1781 * data buffer to skip the bytes which are not
1784 if (pkt_size < 10 && !short_response)
1785 buf = msm_host->rx_buf + (10 - rlen);
1787 buf = msm_host->rx_buf;
1791 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
1792 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
1795 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
1796 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
1797 ret = dsi_short_read1_resp(buf, msg);
1799 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
1800 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
1801 ret = dsi_short_read2_resp(buf, msg);
1803 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
1804 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
1805 ret = dsi_long_read_resp(buf, msg);
1808 pr_warn("%s:Invalid response cmd\n", __func__);
1815 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 iova, u32 len)
1817 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1819 dsi_write(msm_host, REG_DSI_DMA_BASE, iova);
1820 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
1821 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
1823 /* Make sure trigger happens */
1827 int msm_dsi_host_enable(struct mipi_dsi_host *host)
1829 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1831 dsi_op_mode_config(msm_host,
1832 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
1834 /* TODO: clock should be turned off for command mode,
1835 * and only turned on before MDP START.
1836 * This part of code should be enabled once mdp driver support it.
1838 /* if (msm_panel->mode == MSM_DSI_CMD_MODE)
1839 dsi_clk_ctrl(msm_host, 0); */
1844 int msm_dsi_host_disable(struct mipi_dsi_host *host)
1846 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1848 dsi_op_mode_config(msm_host,
1849 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
1851 /* Since we have disabled INTF, the video engine won't stop so that
1852 * the cmd engine will be blocked.
1853 * Reset to disable video engine so that we can send off cmd.
1855 dsi_sw_reset(msm_host);
1860 int msm_dsi_host_power_on(struct mipi_dsi_host *host)
1862 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1863 u32 clk_pre = 0, clk_post = 0;
1866 mutex_lock(&msm_host->dev_mutex);
1867 if (msm_host->power_on) {
1868 DBG("dsi host already on");
1872 ret = dsi_calc_clk_rate(msm_host);
1874 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
1878 ret = dsi_host_regulator_enable(msm_host);
1880 pr_err("%s:Failed to enable vregs.ret=%d\n",
1885 ret = dsi_bus_clk_enable(msm_host);
1887 pr_err("%s: failed to enable bus clocks, %d\n", __func__, ret);
1888 goto fail_disable_reg;
1891 dsi_phy_sw_reset(msm_host);
1892 ret = msm_dsi_manager_phy_enable(msm_host->id,
1893 msm_host->byte_clk_rate * 8,
1894 clk_get_rate(msm_host->esc_clk),
1895 &clk_pre, &clk_post);
1896 dsi_bus_clk_disable(msm_host);
1898 pr_err("%s: failed to enable phy, %d\n", __func__, ret);
1899 goto fail_disable_reg;
1902 ret = dsi_clk_ctrl(msm_host, 1);
1904 pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret);
1905 goto fail_disable_reg;
1908 dsi_timing_setup(msm_host);
1909 dsi_sw_reset(msm_host);
1910 dsi_ctrl_config(msm_host, true, clk_pre, clk_post);
1912 if (msm_host->disp_en_gpio)
1913 gpiod_set_value(msm_host->disp_en_gpio, 1);
1915 msm_host->power_on = true;
1916 mutex_unlock(&msm_host->dev_mutex);
1921 dsi_host_regulator_disable(msm_host);
1923 mutex_unlock(&msm_host->dev_mutex);
1927 int msm_dsi_host_power_off(struct mipi_dsi_host *host)
1929 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1931 mutex_lock(&msm_host->dev_mutex);
1932 if (!msm_host->power_on) {
1933 DBG("dsi host already off");
1937 dsi_ctrl_config(msm_host, false, 0, 0);
1939 if (msm_host->disp_en_gpio)
1940 gpiod_set_value(msm_host->disp_en_gpio, 0);
1942 msm_dsi_manager_phy_disable(msm_host->id);
1944 dsi_clk_ctrl(msm_host, 0);
1946 dsi_host_regulator_disable(msm_host);
1950 msm_host->power_on = false;
1953 mutex_unlock(&msm_host->dev_mutex);
1957 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
1958 struct drm_display_mode *mode)
1960 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1962 if (msm_host->mode) {
1963 drm_mode_destroy(msm_host->dev, msm_host->mode);
1964 msm_host->mode = NULL;
1967 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
1968 if (IS_ERR(msm_host->mode)) {
1969 pr_err("%s: cannot duplicate mode\n", __func__);
1970 return PTR_ERR(msm_host->mode);
1976 struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
1977 unsigned long *panel_flags)
1979 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1980 struct drm_panel *panel;
1982 panel = of_drm_find_panel(msm_host->panel_node);
1984 *panel_flags = msm_host->mode_flags;