1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015 MediaTek Inc.
7 #include <linux/component.h>
8 #include <linux/iopoll.h>
11 #include <linux/of_platform.h>
12 #include <linux/phy/phy.h>
13 #include <linux/platform_device.h>
14 #include <linux/reset.h>
16 #include <video/mipi_display.h>
17 #include <video/videomode.h>
19 #include <drm/drm_atomic_helper.h>
20 #include <drm/drm_bridge.h>
21 #include <drm/drm_bridge_connector.h>
22 #include <drm/drm_mipi_dsi.h>
23 #include <drm/drm_of.h>
24 #include <drm/drm_panel.h>
25 #include <drm/drm_print.h>
26 #include <drm/drm_probe_helper.h>
27 #include <drm/drm_simple_kms_helper.h>
29 #include "mtk_disp_drv.h"
30 #include "mtk_drm_ddp_comp.h"
32 #define DSI_START 0x00
34 #define DSI_INTEN 0x08
36 #define DSI_INTSTA 0x0c
37 #define LPRX_RD_RDY_INT_FLAG BIT(0)
38 #define CMD_DONE_INT_FLAG BIT(1)
39 #define TE_RDY_INT_FLAG BIT(2)
40 #define VM_DONE_INT_FLAG BIT(3)
41 #define EXT_TE_RDY_INT_FLAG BIT(4)
42 #define DSI_BUSY BIT(31)
44 #define DSI_CON_CTRL 0x10
45 #define DSI_RESET BIT(0)
47 #define DPHY_RESET BIT(2)
49 #define DSI_MODE_CTRL 0x14
52 #define SYNC_PULSE_MODE 1
53 #define SYNC_EVENT_MODE 2
55 #define FRM_MODE BIT(16)
56 #define MIX_MODE BIT(17)
58 #define DSI_TXRX_CTRL 0x18
60 #define LANE_NUM (0xf << 2)
61 #define DIS_EOT BIT(6)
62 #define NULL_EN BIT(7)
63 #define TE_FREERUN BIT(8)
64 #define EXT_TE_EN BIT(9)
65 #define EXT_TE_EDGE BIT(10)
66 #define MAX_RTN_SIZE (0xf << 12)
67 #define HSTX_CKLP_EN BIT(16)
69 #define DSI_PSCTRL 0x1c
70 #define DSI_PS_WC 0x3fff
71 #define DSI_PS_SEL (3 << 16)
72 #define PACKED_PS_16BIT_RGB565 (0 << 16)
73 #define LOOSELY_PS_18BIT_RGB666 (1 << 16)
74 #define PACKED_PS_18BIT_RGB666 (2 << 16)
75 #define PACKED_PS_24BIT_RGB888 (3 << 16)
77 #define DSI_VSA_NL 0x20
78 #define DSI_VBP_NL 0x24
79 #define DSI_VFP_NL 0x28
80 #define DSI_VACT_NL 0x2C
81 #define DSI_SIZE_CON 0x38
82 #define DSI_HSA_WC 0x50
83 #define DSI_HBP_WC 0x54
84 #define DSI_HFP_WC 0x58
86 #define DSI_CMDQ_SIZE 0x60
87 #define CMDQ_SIZE 0x3f
89 #define DSI_HSTX_CKL_WC 0x64
91 #define DSI_RX_DATA0 0x74
92 #define DSI_RX_DATA1 0x78
93 #define DSI_RX_DATA2 0x7c
94 #define DSI_RX_DATA3 0x80
99 #define DSI_PHY_LCCON 0x104
100 #define LC_HS_TX_EN BIT(0)
101 #define LC_ULPM_EN BIT(1)
102 #define LC_WAKEUP_EN BIT(2)
104 #define DSI_PHY_LD0CON 0x108
105 #define LD0_HS_TX_EN BIT(0)
106 #define LD0_ULPM_EN BIT(1)
107 #define LD0_WAKEUP_EN BIT(2)
109 #define DSI_PHY_TIMECON0 0x110
110 #define LPX (0xff << 0)
111 #define HS_PREP (0xff << 8)
112 #define HS_ZERO (0xff << 16)
113 #define HS_TRAIL (0xff << 24)
115 #define DSI_PHY_TIMECON1 0x114
116 #define TA_GO (0xff << 0)
117 #define TA_SURE (0xff << 8)
118 #define TA_GET (0xff << 16)
119 #define DA_HS_EXIT (0xff << 24)
121 #define DSI_PHY_TIMECON2 0x118
122 #define CONT_DET (0xff << 0)
123 #define CLK_ZERO (0xff << 16)
124 #define CLK_TRAIL (0xff << 24)
126 #define DSI_PHY_TIMECON3 0x11c
127 #define CLK_HS_PREP (0xff << 0)
128 #define CLK_HS_POST (0xff << 8)
129 #define CLK_HS_EXIT (0xff << 16)
131 #define DSI_VM_CMD_CON 0x130
132 #define VM_CMD_EN BIT(0)
133 #define TS_VFP_EN BIT(5)
135 #define DSI_SHADOW_DEBUG 0x190U
136 #define FORCE_COMMIT BIT(0)
137 #define BYPASS_SHADOW BIT(1)
139 #define CONFIG (0xff << 0)
140 #define SHORT_PACKET 0
141 #define LONG_PACKET 2
143 #define DATA_ID (0xff << 8)
144 #define DATA_0 (0xff << 16)
145 #define DATA_1 (0xff << 24)
147 #define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
149 #define MTK_DSI_HOST_IS_READ(type) \
150 ((type == MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM) || \
151 (type == MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM) || \
152 (type == MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM) || \
153 (type == MIPI_DSI_DCS_READ))
155 struct mtk_phy_timing {
176 struct mtk_dsi_driver_data {
177 const u32 reg_cmdq_off;
184 struct mipi_dsi_host host;
185 struct drm_encoder encoder;
186 struct drm_bridge bridge;
187 struct drm_bridge *next_bridge;
188 struct drm_connector *connector;
193 struct clk *engine_clk;
194 struct clk *digital_clk;
199 unsigned long mode_flags;
200 enum mipi_dsi_pixel_format format;
203 struct mtk_phy_timing phy_timing;
208 wait_queue_head_t irq_wait_queue;
209 const struct mtk_dsi_driver_data *driver_data;
212 static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
214 return container_of(b, struct mtk_dsi, bridge);
217 static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h)
219 return container_of(h, struct mtk_dsi, host);
222 static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
224 u32 temp = readl(dsi->regs + offset);
226 writel((temp & ~mask) | (data & mask), dsi->regs + offset);
229 static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi)
231 u32 timcon0, timcon1, timcon2, timcon3;
232 u32 data_rate_mhz = DIV_ROUND_UP(dsi->data_rate, 1000000);
233 struct mtk_phy_timing *timing = &dsi->phy_timing;
235 timing->lpx = (60 * data_rate_mhz / (8 * 1000)) + 1;
236 timing->da_hs_prepare = (80 * data_rate_mhz + 4 * 1000) / 8000;
237 timing->da_hs_zero = (170 * data_rate_mhz + 10 * 1000) / 8000 + 1 -
238 timing->da_hs_prepare;
239 timing->da_hs_trail = timing->da_hs_prepare + 1;
241 timing->ta_go = 4 * timing->lpx - 2;
242 timing->ta_sure = timing->lpx + 2;
243 timing->ta_get = 4 * timing->lpx;
244 timing->da_hs_exit = 2 * timing->lpx + 1;
246 timing->clk_hs_prepare = 70 * data_rate_mhz / (8 * 1000);
247 timing->clk_hs_post = timing->clk_hs_prepare + 8;
248 timing->clk_hs_trail = timing->clk_hs_prepare;
249 timing->clk_hs_zero = timing->clk_hs_trail * 4;
250 timing->clk_hs_exit = 2 * timing->clk_hs_trail;
252 timcon0 = timing->lpx | timing->da_hs_prepare << 8 |
253 timing->da_hs_zero << 16 | timing->da_hs_trail << 24;
254 timcon1 = timing->ta_go | timing->ta_sure << 8 |
255 timing->ta_get << 16 | timing->da_hs_exit << 24;
256 timcon2 = 1 << 8 | timing->clk_hs_zero << 16 |
257 timing->clk_hs_trail << 24;
258 timcon3 = timing->clk_hs_prepare | timing->clk_hs_post << 8 |
259 timing->clk_hs_exit << 16;
261 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
262 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
263 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2);
264 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3);
267 static void mtk_dsi_enable(struct mtk_dsi *dsi)
269 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN);
272 static void mtk_dsi_disable(struct mtk_dsi *dsi)
274 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0);
277 static void mtk_dsi_reset_engine(struct mtk_dsi *dsi)
279 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET);
280 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0);
283 static void mtk_dsi_reset_dphy(struct mtk_dsi *dsi)
285 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, DPHY_RESET);
286 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, 0);
289 static void mtk_dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi)
291 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
292 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
295 static void mtk_dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi)
297 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
298 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN);
299 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0);
302 static void mtk_dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi)
304 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0);
305 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
308 static void mtk_dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi)
310 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
311 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN);
312 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0);
315 static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
317 return readl(dsi->regs + DSI_PHY_LCCON) & LC_HS_TX_EN;
320 static void mtk_dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
322 if (enter && !mtk_dsi_clk_hs_state(dsi))
323 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN);
324 else if (!enter && mtk_dsi_clk_hs_state(dsi))
325 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
328 static void mtk_dsi_set_mode(struct mtk_dsi *dsi)
330 u32 vid_mode = CMD_MODE;
332 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
333 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
334 vid_mode = BURST_MODE;
335 else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
336 vid_mode = SYNC_PULSE_MODE;
338 vid_mode = SYNC_EVENT_MODE;
341 writel(vid_mode, dsi->regs + DSI_MODE_CTRL);
344 static void mtk_dsi_set_vm_cmd(struct mtk_dsi *dsi)
346 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, VM_CMD_EN, VM_CMD_EN);
347 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, TS_VFP_EN, TS_VFP_EN);
350 static void mtk_dsi_ps_control_vact(struct mtk_dsi *dsi)
352 struct videomode *vm = &dsi->vm;
353 u32 dsi_buf_bpp, ps_wc;
356 if (dsi->format == MIPI_DSI_FMT_RGB565)
361 ps_wc = vm->hactive * dsi_buf_bpp;
364 switch (dsi->format) {
365 case MIPI_DSI_FMT_RGB888:
366 ps_bpp_mode |= PACKED_PS_24BIT_RGB888;
368 case MIPI_DSI_FMT_RGB666:
369 ps_bpp_mode |= PACKED_PS_18BIT_RGB666;
371 case MIPI_DSI_FMT_RGB666_PACKED:
372 ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666;
374 case MIPI_DSI_FMT_RGB565:
375 ps_bpp_mode |= PACKED_PS_16BIT_RGB565;
379 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
380 writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL);
381 writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC);
384 static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi)
388 switch (dsi->lanes) {
406 if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
407 tmp_reg |= HSTX_CKLP_EN;
409 if (!(dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET))
412 writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
415 static void mtk_dsi_ps_control(struct mtk_dsi *dsi)
420 switch (dsi->format) {
421 case MIPI_DSI_FMT_RGB888:
422 tmp_reg = PACKED_PS_24BIT_RGB888;
425 case MIPI_DSI_FMT_RGB666:
426 tmp_reg = LOOSELY_PS_18BIT_RGB666;
429 case MIPI_DSI_FMT_RGB666_PACKED:
430 tmp_reg = PACKED_PS_18BIT_RGB666;
433 case MIPI_DSI_FMT_RGB565:
434 tmp_reg = PACKED_PS_16BIT_RGB565;
438 tmp_reg = PACKED_PS_24BIT_RGB888;
443 tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC;
444 writel(tmp_reg, dsi->regs + DSI_PSCTRL);
447 static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
449 u32 horizontal_sync_active_byte;
450 u32 horizontal_backporch_byte;
451 u32 horizontal_frontporch_byte;
452 u32 horizontal_front_back_byte;
453 u32 data_phy_cycles_byte;
454 u32 dsi_tmp_buf_bpp, data_phy_cycles;
456 struct mtk_phy_timing *timing = &dsi->phy_timing;
458 struct videomode *vm = &dsi->vm;
460 if (dsi->format == MIPI_DSI_FMT_RGB565)
465 writel(vm->vsync_len, dsi->regs + DSI_VSA_NL);
466 writel(vm->vback_porch, dsi->regs + DSI_VBP_NL);
467 writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
468 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
470 if (dsi->driver_data->has_size_ctl)
471 writel(vm->vactive << 16 | vm->hactive,
472 dsi->regs + DSI_SIZE_CON);
474 horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
476 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
477 horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp - 10;
479 horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
480 dsi_tmp_buf_bpp - 10;
482 data_phy_cycles = timing->lpx + timing->da_hs_prepare +
483 timing->da_hs_zero + timing->da_hs_exit + 3;
485 delta = dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST ? 18 : 12;
486 delta += dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET ? 2 : 0;
488 horizontal_frontporch_byte = vm->hfront_porch * dsi_tmp_buf_bpp;
489 horizontal_front_back_byte = horizontal_frontporch_byte + horizontal_backporch_byte;
490 data_phy_cycles_byte = data_phy_cycles * dsi->lanes + delta;
492 if (horizontal_front_back_byte > data_phy_cycles_byte) {
493 horizontal_frontporch_byte -= data_phy_cycles_byte *
494 horizontal_frontporch_byte /
495 horizontal_front_back_byte;
497 horizontal_backporch_byte -= data_phy_cycles_byte *
498 horizontal_backporch_byte /
499 horizontal_front_back_byte;
501 DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n");
504 if ((dsi->mode_flags & MIPI_DSI_HS_PKT_END_ALIGNED) &&
506 horizontal_sync_active_byte =
507 roundup(horizontal_sync_active_byte, dsi->lanes) - 2;
508 horizontal_frontporch_byte =
509 roundup(horizontal_frontporch_byte, dsi->lanes) - 2;
510 horizontal_backporch_byte =
511 roundup(horizontal_backporch_byte, dsi->lanes) - 2;
512 horizontal_backporch_byte -=
513 (vm->hactive * dsi_tmp_buf_bpp + 2) % dsi->lanes;
516 writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
517 writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
518 writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
520 mtk_dsi_ps_control(dsi);
523 static void mtk_dsi_start(struct mtk_dsi *dsi)
525 writel(0, dsi->regs + DSI_START);
526 writel(1, dsi->regs + DSI_START);
529 static void mtk_dsi_stop(struct mtk_dsi *dsi)
531 writel(0, dsi->regs + DSI_START);
534 static void mtk_dsi_set_cmd_mode(struct mtk_dsi *dsi)
536 writel(CMD_MODE, dsi->regs + DSI_MODE_CTRL);
539 static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi)
541 u32 inten = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
543 writel(inten, dsi->regs + DSI_INTEN);
546 static void mtk_dsi_irq_data_set(struct mtk_dsi *dsi, u32 irq_bit)
548 dsi->irq_data |= irq_bit;
551 static void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit)
553 dsi->irq_data &= ~irq_bit;
556 static s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag,
557 unsigned int timeout)
560 unsigned long jiffies = msecs_to_jiffies(timeout);
562 ret = wait_event_interruptible_timeout(dsi->irq_wait_queue,
563 dsi->irq_data & irq_flag,
566 DRM_WARN("Wait DSI IRQ(0x%08x) Timeout\n", irq_flag);
569 mtk_dsi_reset_engine(dsi);
575 static irqreturn_t mtk_dsi_irq(int irq, void *dev_id)
577 struct mtk_dsi *dsi = dev_id;
579 u32 flag = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
581 status = readl(dsi->regs + DSI_INTSTA) & flag;
585 mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK);
586 tmp = readl(dsi->regs + DSI_INTSTA);
587 } while (tmp & DSI_BUSY);
589 mtk_dsi_mask(dsi, DSI_INTSTA, status, 0);
590 mtk_dsi_irq_data_set(dsi, status);
591 wake_up_interruptible(&dsi->irq_wait_queue);
597 static s32 mtk_dsi_switch_to_cmd_mode(struct mtk_dsi *dsi, u8 irq_flag, u32 t)
599 mtk_dsi_irq_data_clear(dsi, irq_flag);
600 mtk_dsi_set_cmd_mode(dsi);
602 if (!mtk_dsi_wait_for_irq_done(dsi, irq_flag, t)) {
603 DRM_ERROR("failed to switch cmd mode\n");
610 static int mtk_dsi_poweron(struct mtk_dsi *dsi)
612 struct device *dev = dsi->host.dev;
616 if (++dsi->refcount != 1)
619 switch (dsi->format) {
620 case MIPI_DSI_FMT_RGB565:
623 case MIPI_DSI_FMT_RGB666_PACKED:
626 case MIPI_DSI_FMT_RGB666:
627 case MIPI_DSI_FMT_RGB888:
633 dsi->data_rate = DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel,
636 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
638 dev_err(dev, "Failed to set data rate: %d\n", ret);
642 phy_power_on(dsi->phy);
644 ret = clk_prepare_enable(dsi->engine_clk);
646 dev_err(dev, "Failed to enable engine clock: %d\n", ret);
647 goto err_phy_power_off;
650 ret = clk_prepare_enable(dsi->digital_clk);
652 dev_err(dev, "Failed to enable digital clock: %d\n", ret);
653 goto err_disable_engine_clk;
658 if (dsi->driver_data->has_shadow_ctl)
659 writel(FORCE_COMMIT | BYPASS_SHADOW,
660 dsi->regs + DSI_SHADOW_DEBUG);
662 mtk_dsi_reset_engine(dsi);
663 mtk_dsi_phy_timconfig(dsi);
665 mtk_dsi_ps_control_vact(dsi);
666 mtk_dsi_set_vm_cmd(dsi);
667 mtk_dsi_config_vdo_timing(dsi);
668 mtk_dsi_set_interrupt_enable(dsi);
671 err_disable_engine_clk:
672 clk_disable_unprepare(dsi->engine_clk);
674 phy_power_off(dsi->phy);
680 static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
682 if (WARN_ON(dsi->refcount == 0))
685 if (--dsi->refcount != 0)
689 * mtk_dsi_stop() and mtk_dsi_start() is asymmetric, since
690 * mtk_dsi_stop() should be called after mtk_drm_crtc_atomic_disable(),
691 * which needs irq for vblank, and mtk_dsi_stop() will disable irq.
692 * mtk_dsi_start() needs to be called in mtk_output_dsi_enable(),
693 * after dsi is fully set.
697 mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500);
698 mtk_dsi_reset_engine(dsi);
699 mtk_dsi_lane0_ulp_mode_enter(dsi);
700 mtk_dsi_clk_ulp_mode_enter(dsi);
701 /* set the lane number as 0 to pull down mipi */
702 writel(0, dsi->regs + DSI_TXRX_CTRL);
704 mtk_dsi_disable(dsi);
706 clk_disable_unprepare(dsi->engine_clk);
707 clk_disable_unprepare(dsi->digital_clk);
709 phy_power_off(dsi->phy);
711 dsi->lanes_ready = false;
714 static void mtk_dsi_lane_ready(struct mtk_dsi *dsi)
716 if (!dsi->lanes_ready) {
717 dsi->lanes_ready = true;
718 mtk_dsi_rxtx_control(dsi);
719 usleep_range(30, 100);
720 mtk_dsi_reset_dphy(dsi);
721 mtk_dsi_clk_ulp_mode_leave(dsi);
722 mtk_dsi_lane0_ulp_mode_leave(dsi);
723 mtk_dsi_clk_hs_mode(dsi, 0);
725 /* The reaction time after pulling up the mipi signal for dsi_rx */
729 static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
734 mtk_dsi_lane_ready(dsi);
735 mtk_dsi_set_mode(dsi);
736 mtk_dsi_clk_hs_mode(dsi, 1);
743 static void mtk_output_dsi_disable(struct mtk_dsi *dsi)
748 dsi->enabled = false;
751 static int mtk_dsi_bridge_attach(struct drm_bridge *bridge,
752 enum drm_bridge_attach_flags flags)
754 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
756 /* Attach the panel or bridge to the dsi bridge */
757 return drm_bridge_attach(bridge->encoder, dsi->next_bridge,
758 &dsi->bridge, flags);
761 static void mtk_dsi_bridge_mode_set(struct drm_bridge *bridge,
762 const struct drm_display_mode *mode,
763 const struct drm_display_mode *adjusted)
765 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
767 drm_display_mode_to_videomode(adjusted, &dsi->vm);
770 static void mtk_dsi_bridge_atomic_disable(struct drm_bridge *bridge,
771 struct drm_bridge_state *old_bridge_state)
773 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
775 mtk_output_dsi_disable(dsi);
778 static void mtk_dsi_bridge_atomic_enable(struct drm_bridge *bridge,
779 struct drm_bridge_state *old_bridge_state)
781 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
783 if (dsi->refcount == 0)
786 mtk_output_dsi_enable(dsi);
789 static void mtk_dsi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
790 struct drm_bridge_state *old_bridge_state)
792 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
795 ret = mtk_dsi_poweron(dsi);
797 DRM_ERROR("failed to power on dsi\n");
800 static void mtk_dsi_bridge_atomic_post_disable(struct drm_bridge *bridge,
801 struct drm_bridge_state *old_bridge_state)
803 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
805 mtk_dsi_poweroff(dsi);
808 static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = {
809 .attach = mtk_dsi_bridge_attach,
810 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
811 .atomic_disable = mtk_dsi_bridge_atomic_disable,
812 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
813 .atomic_enable = mtk_dsi_bridge_atomic_enable,
814 .atomic_pre_enable = mtk_dsi_bridge_atomic_pre_enable,
815 .atomic_post_disable = mtk_dsi_bridge_atomic_post_disable,
816 .atomic_reset = drm_atomic_helper_bridge_reset,
817 .mode_set = mtk_dsi_bridge_mode_set,
820 void mtk_dsi_ddp_start(struct device *dev)
822 struct mtk_dsi *dsi = dev_get_drvdata(dev);
824 mtk_dsi_poweron(dsi);
827 void mtk_dsi_ddp_stop(struct device *dev)
829 struct mtk_dsi *dsi = dev_get_drvdata(dev);
831 mtk_dsi_poweroff(dsi);
834 static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
838 ret = drm_simple_encoder_init(drm, &dsi->encoder,
839 DRM_MODE_ENCODER_DSI);
841 DRM_ERROR("Failed to encoder init to drm\n");
845 dsi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm, dsi->host.dev);
847 ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL,
848 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
850 goto err_cleanup_encoder;
852 dsi->connector = drm_bridge_connector_init(drm, &dsi->encoder);
853 if (IS_ERR(dsi->connector)) {
854 DRM_ERROR("Unable to create bridge connector\n");
855 ret = PTR_ERR(dsi->connector);
856 goto err_cleanup_encoder;
858 drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
863 drm_encoder_cleanup(&dsi->encoder);
867 static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
870 struct drm_device *drm = data;
871 struct mtk_dsi *dsi = dev_get_drvdata(dev);
873 ret = mtk_dsi_encoder_init(drm, dsi);
877 return device_reset_optional(dev);
880 static void mtk_dsi_unbind(struct device *dev, struct device *master,
883 struct mtk_dsi *dsi = dev_get_drvdata(dev);
885 drm_encoder_cleanup(&dsi->encoder);
888 static const struct component_ops mtk_dsi_component_ops = {
889 .bind = mtk_dsi_bind,
890 .unbind = mtk_dsi_unbind,
893 static int mtk_dsi_host_attach(struct mipi_dsi_host *host,
894 struct mipi_dsi_device *device)
896 struct mtk_dsi *dsi = host_to_dsi(host);
897 struct device *dev = host->dev;
900 dsi->lanes = device->lanes;
901 dsi->format = device->format;
902 dsi->mode_flags = device->mode_flags;
903 dsi->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
904 if (IS_ERR(dsi->next_bridge))
905 return PTR_ERR(dsi->next_bridge);
907 drm_bridge_add(&dsi->bridge);
909 ret = component_add(host->dev, &mtk_dsi_component_ops);
911 DRM_ERROR("failed to add dsi_host component: %d\n", ret);
912 drm_bridge_remove(&dsi->bridge);
919 static int mtk_dsi_host_detach(struct mipi_dsi_host *host,
920 struct mipi_dsi_device *device)
922 struct mtk_dsi *dsi = host_to_dsi(host);
924 component_del(host->dev, &mtk_dsi_component_ops);
925 drm_bridge_remove(&dsi->bridge);
929 static void mtk_dsi_wait_for_idle(struct mtk_dsi *dsi)
934 ret = readl_poll_timeout(dsi->regs + DSI_INTSTA, val, !(val & DSI_BUSY),
937 DRM_WARN("polling dsi wait not busy timeout!\n");
940 mtk_dsi_reset_engine(dsi);
944 static u32 mtk_dsi_recv_cnt(u8 type, u8 *read_data)
947 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
948 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
950 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
951 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
953 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
954 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
955 return read_data[1] + read_data[2] * 16;
956 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
957 DRM_INFO("type is 0x02, try again\n");
960 DRM_INFO("type(0x%x) not recognized\n", type);
967 static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
969 const char *tx_buf = msg->tx_buf;
970 u8 config, cmdq_size, cmdq_off, type = msg->type;
971 u32 reg_val, cmdq_mask, i;
972 u32 reg_cmdq_off = dsi->driver_data->reg_cmdq_off;
974 if (MTK_DSI_HOST_IS_READ(type))
977 config = (msg->tx_len > 2) ? LONG_PACKET : SHORT_PACKET;
979 if (msg->tx_len > 2) {
980 cmdq_size = 1 + (msg->tx_len + 3) / 4;
982 cmdq_mask = CONFIG | DATA_ID | DATA_0 | DATA_1;
983 reg_val = (msg->tx_len << 16) | (type << 8) | config;
987 cmdq_mask = CONFIG | DATA_ID;
988 reg_val = (type << 8) | config;
991 for (i = 0; i < msg->tx_len; i++)
992 mtk_dsi_mask(dsi, (reg_cmdq_off + cmdq_off + i) & (~0x3U),
993 (0xffUL << (((i + cmdq_off) & 3U) * 8U)),
994 tx_buf[i] << (((i + cmdq_off) & 3U) * 8U));
996 mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
997 mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
1000 static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
1001 const struct mipi_dsi_msg *msg, u8 flag)
1003 mtk_dsi_wait_for_idle(dsi);
1004 mtk_dsi_irq_data_clear(dsi, flag);
1005 mtk_dsi_cmdq(dsi, msg);
1008 if (!mtk_dsi_wait_for_irq_done(dsi, flag, 2000))
1014 static ssize_t mtk_dsi_host_transfer(struct mipi_dsi_host *host,
1015 const struct mipi_dsi_msg *msg)
1017 struct mtk_dsi *dsi = host_to_dsi(host);
1021 u8 irq_flag = CMD_DONE_INT_FLAG;
1025 dsi_mode = readl(dsi->regs + DSI_MODE_CTRL);
1026 if (dsi_mode & MODE) {
1028 ret = mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500);
1030 goto restore_dsi_mode;
1033 if (MTK_DSI_HOST_IS_READ(msg->type))
1034 irq_flag |= LPRX_RD_RDY_INT_FLAG;
1036 mtk_dsi_lane_ready(dsi);
1038 ret = mtk_dsi_host_send_cmd(dsi, msg, irq_flag);
1040 goto restore_dsi_mode;
1042 if (!MTK_DSI_HOST_IS_READ(msg->type)) {
1044 goto restore_dsi_mode;
1048 DRM_ERROR("dsi receive buffer size may be NULL\n");
1050 goto restore_dsi_mode;
1053 for (i = 0; i < 16; i++)
1054 *(read_data + i) = readb(dsi->regs + DSI_RX_DATA0 + i);
1056 recv_cnt = mtk_dsi_recv_cnt(read_data[0], read_data);
1059 src_addr = &read_data[4];
1061 src_addr = &read_data[1];
1066 if (recv_cnt > msg->rx_len)
1067 recv_cnt = msg->rx_len;
1070 memcpy(msg->rx_buf, src_addr, recv_cnt);
1072 DRM_INFO("dsi get %d byte data from the panel address(0x%x)\n",
1073 recv_cnt, *((u8 *)(msg->tx_buf)));
1076 if (dsi_mode & MODE) {
1077 mtk_dsi_set_mode(dsi);
1081 return ret < 0 ? ret : recv_cnt;
1084 static const struct mipi_dsi_host_ops mtk_dsi_ops = {
1085 .attach = mtk_dsi_host_attach,
1086 .detach = mtk_dsi_host_detach,
1087 .transfer = mtk_dsi_host_transfer,
1090 static int mtk_dsi_probe(struct platform_device *pdev)
1092 struct mtk_dsi *dsi;
1093 struct device *dev = &pdev->dev;
1094 struct resource *regs;
1098 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
1102 dsi->host.ops = &mtk_dsi_ops;
1103 dsi->host.dev = dev;
1104 ret = mipi_dsi_host_register(&dsi->host);
1106 dev_err(dev, "failed to register DSI host: %d\n", ret);
1110 dsi->driver_data = of_device_get_match_data(dev);
1112 dsi->engine_clk = devm_clk_get(dev, "engine");
1113 if (IS_ERR(dsi->engine_clk)) {
1114 ret = PTR_ERR(dsi->engine_clk);
1116 if (ret != -EPROBE_DEFER)
1117 dev_err(dev, "Failed to get engine clock: %d\n", ret);
1118 goto err_unregister_host;
1121 dsi->digital_clk = devm_clk_get(dev, "digital");
1122 if (IS_ERR(dsi->digital_clk)) {
1123 ret = PTR_ERR(dsi->digital_clk);
1125 if (ret != -EPROBE_DEFER)
1126 dev_err(dev, "Failed to get digital clock: %d\n", ret);
1127 goto err_unregister_host;
1130 dsi->hs_clk = devm_clk_get(dev, "hs");
1131 if (IS_ERR(dsi->hs_clk)) {
1132 ret = PTR_ERR(dsi->hs_clk);
1133 dev_err(dev, "Failed to get hs clock: %d\n", ret);
1134 goto err_unregister_host;
1137 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1138 dsi->regs = devm_ioremap_resource(dev, regs);
1139 if (IS_ERR(dsi->regs)) {
1140 ret = PTR_ERR(dsi->regs);
1141 dev_err(dev, "Failed to ioremap memory: %d\n", ret);
1142 goto err_unregister_host;
1145 dsi->phy = devm_phy_get(dev, "dphy");
1146 if (IS_ERR(dsi->phy)) {
1147 ret = PTR_ERR(dsi->phy);
1148 dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret);
1149 goto err_unregister_host;
1152 irq_num = platform_get_irq(pdev, 0);
1155 goto err_unregister_host;
1158 ret = devm_request_irq(&pdev->dev, irq_num, mtk_dsi_irq,
1159 IRQF_TRIGGER_NONE, dev_name(&pdev->dev), dsi);
1161 dev_err(&pdev->dev, "failed to request mediatek dsi irq\n");
1162 goto err_unregister_host;
1165 init_waitqueue_head(&dsi->irq_wait_queue);
1167 platform_set_drvdata(pdev, dsi);
1169 dsi->bridge.funcs = &mtk_dsi_bridge_funcs;
1170 dsi->bridge.of_node = dev->of_node;
1171 dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
1175 err_unregister_host:
1176 mipi_dsi_host_unregister(&dsi->host);
1180 static int mtk_dsi_remove(struct platform_device *pdev)
1182 struct mtk_dsi *dsi = platform_get_drvdata(pdev);
1184 mtk_output_dsi_disable(dsi);
1185 mipi_dsi_host_unregister(&dsi->host);
1190 static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = {
1191 .reg_cmdq_off = 0x200,
1194 static const struct mtk_dsi_driver_data mt2701_dsi_driver_data = {
1195 .reg_cmdq_off = 0x180,
1198 static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
1199 .reg_cmdq_off = 0x200,
1200 .has_shadow_ctl = true,
1201 .has_size_ctl = true,
1204 static const struct of_device_id mtk_dsi_of_match[] = {
1205 { .compatible = "mediatek,mt2701-dsi",
1206 .data = &mt2701_dsi_driver_data },
1207 { .compatible = "mediatek,mt8173-dsi",
1208 .data = &mt8173_dsi_driver_data },
1209 { .compatible = "mediatek,mt8183-dsi",
1210 .data = &mt8183_dsi_driver_data },
1213 MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);
1215 struct platform_driver mtk_dsi_driver = {
1216 .probe = mtk_dsi_probe,
1217 .remove = mtk_dsi_remove,
1220 .of_match_table = mtk_dsi_of_match,