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>
15 #include <video/mipi_display.h>
16 #include <video/videomode.h>
18 #include <drm/drm_atomic_helper.h>
19 #include <drm/drm_bridge.h>
20 #include <drm/drm_bridge_connector.h>
21 #include <drm/drm_mipi_dsi.h>
22 #include <drm/drm_of.h>
23 #include <drm/drm_panel.h>
24 #include <drm/drm_print.h>
25 #include <drm/drm_probe_helper.h>
26 #include <drm/drm_simple_kms_helper.h>
28 #include "mtk_disp_drv.h"
29 #include "mtk_drm_ddp_comp.h"
31 #define DSI_START 0x00
33 #define DSI_INTEN 0x08
35 #define DSI_INTSTA 0x0c
36 #define LPRX_RD_RDY_INT_FLAG BIT(0)
37 #define CMD_DONE_INT_FLAG BIT(1)
38 #define TE_RDY_INT_FLAG BIT(2)
39 #define VM_DONE_INT_FLAG BIT(3)
40 #define EXT_TE_RDY_INT_FLAG BIT(4)
41 #define DSI_BUSY BIT(31)
43 #define DSI_CON_CTRL 0x10
44 #define DSI_RESET BIT(0)
46 #define DPHY_RESET BIT(2)
48 #define DSI_MODE_CTRL 0x14
51 #define SYNC_PULSE_MODE 1
52 #define SYNC_EVENT_MODE 2
54 #define FRM_MODE BIT(16)
55 #define MIX_MODE BIT(17)
57 #define DSI_TXRX_CTRL 0x18
59 #define LANE_NUM (0xf << 2)
60 #define DIS_EOT BIT(6)
61 #define NULL_EN BIT(7)
62 #define TE_FREERUN BIT(8)
63 #define EXT_TE_EN BIT(9)
64 #define EXT_TE_EDGE BIT(10)
65 #define MAX_RTN_SIZE (0xf << 12)
66 #define HSTX_CKLP_EN BIT(16)
68 #define DSI_PSCTRL 0x1c
69 #define DSI_PS_WC 0x3fff
70 #define DSI_PS_SEL (3 << 16)
71 #define PACKED_PS_16BIT_RGB565 (0 << 16)
72 #define LOOSELY_PS_18BIT_RGB666 (1 << 16)
73 #define PACKED_PS_18BIT_RGB666 (2 << 16)
74 #define PACKED_PS_24BIT_RGB888 (3 << 16)
76 #define DSI_VSA_NL 0x20
77 #define DSI_VBP_NL 0x24
78 #define DSI_VFP_NL 0x28
79 #define DSI_VACT_NL 0x2C
80 #define DSI_SIZE_CON 0x38
81 #define DSI_HSA_WC 0x50
82 #define DSI_HBP_WC 0x54
83 #define DSI_HFP_WC 0x58
85 #define DSI_CMDQ_SIZE 0x60
86 #define CMDQ_SIZE 0x3f
88 #define DSI_HSTX_CKL_WC 0x64
90 #define DSI_RX_DATA0 0x74
91 #define DSI_RX_DATA1 0x78
92 #define DSI_RX_DATA2 0x7c
93 #define DSI_RX_DATA3 0x80
98 #define DSI_PHY_LCCON 0x104
99 #define LC_HS_TX_EN BIT(0)
100 #define LC_ULPM_EN BIT(1)
101 #define LC_WAKEUP_EN BIT(2)
103 #define DSI_PHY_LD0CON 0x108
104 #define LD0_HS_TX_EN BIT(0)
105 #define LD0_ULPM_EN BIT(1)
106 #define LD0_WAKEUP_EN BIT(2)
108 #define DSI_PHY_TIMECON0 0x110
109 #define LPX (0xff << 0)
110 #define HS_PREP (0xff << 8)
111 #define HS_ZERO (0xff << 16)
112 #define HS_TRAIL (0xff << 24)
114 #define DSI_PHY_TIMECON1 0x114
115 #define TA_GO (0xff << 0)
116 #define TA_SURE (0xff << 8)
117 #define TA_GET (0xff << 16)
118 #define DA_HS_EXIT (0xff << 24)
120 #define DSI_PHY_TIMECON2 0x118
121 #define CONT_DET (0xff << 0)
122 #define CLK_ZERO (0xff << 16)
123 #define CLK_TRAIL (0xff << 24)
125 #define DSI_PHY_TIMECON3 0x11c
126 #define CLK_HS_PREP (0xff << 0)
127 #define CLK_HS_POST (0xff << 8)
128 #define CLK_HS_EXIT (0xff << 16)
130 #define DSI_VM_CMD_CON 0x130
131 #define VM_CMD_EN BIT(0)
132 #define TS_VFP_EN BIT(5)
134 #define DSI_SHADOW_DEBUG 0x190U
135 #define FORCE_COMMIT BIT(0)
136 #define BYPASS_SHADOW BIT(1)
138 #define CONFIG (0xff << 0)
139 #define SHORT_PACKET 0
140 #define LONG_PACKET 2
142 #define DATA_ID (0xff << 8)
143 #define DATA_0 (0xff << 16)
144 #define DATA_1 (0xff << 24)
146 #define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
148 #define MTK_DSI_HOST_IS_READ(type) \
149 ((type == MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM) || \
150 (type == MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM) || \
151 (type == MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM) || \
152 (type == MIPI_DSI_DCS_READ))
154 struct mtk_phy_timing {
175 struct mtk_dsi_driver_data {
176 const u32 reg_cmdq_off;
183 struct mipi_dsi_host host;
184 struct drm_encoder encoder;
185 struct drm_bridge bridge;
186 struct drm_bridge *next_bridge;
187 struct drm_connector *connector;
192 struct clk *engine_clk;
193 struct clk *digital_clk;
198 unsigned long mode_flags;
199 enum mipi_dsi_pixel_format format;
202 struct mtk_phy_timing phy_timing;
206 wait_queue_head_t irq_wait_queue;
207 const struct mtk_dsi_driver_data *driver_data;
210 static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
212 return container_of(b, struct mtk_dsi, bridge);
215 static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h)
217 return container_of(h, struct mtk_dsi, host);
220 static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
222 u32 temp = readl(dsi->regs + offset);
224 writel((temp & ~mask) | (data & mask), dsi->regs + offset);
227 static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi)
229 u32 timcon0, timcon1, timcon2, timcon3;
230 u32 data_rate_mhz = DIV_ROUND_UP(dsi->data_rate, 1000000);
231 struct mtk_phy_timing *timing = &dsi->phy_timing;
233 timing->lpx = (60 * data_rate_mhz / (8 * 1000)) + 1;
234 timing->da_hs_prepare = (80 * data_rate_mhz + 4 * 1000) / 8000;
235 timing->da_hs_zero = (170 * data_rate_mhz + 10 * 1000) / 8000 + 1 -
236 timing->da_hs_prepare;
237 timing->da_hs_trail = timing->da_hs_prepare + 1;
239 timing->ta_go = 4 * timing->lpx - 2;
240 timing->ta_sure = timing->lpx + 2;
241 timing->ta_get = 4 * timing->lpx;
242 timing->da_hs_exit = 2 * timing->lpx + 1;
244 timing->clk_hs_prepare = 70 * data_rate_mhz / (8 * 1000);
245 timing->clk_hs_post = timing->clk_hs_prepare + 8;
246 timing->clk_hs_trail = timing->clk_hs_prepare;
247 timing->clk_hs_zero = timing->clk_hs_trail * 4;
248 timing->clk_hs_exit = 2 * timing->clk_hs_trail;
250 timcon0 = timing->lpx | timing->da_hs_prepare << 8 |
251 timing->da_hs_zero << 16 | timing->da_hs_trail << 24;
252 timcon1 = timing->ta_go | timing->ta_sure << 8 |
253 timing->ta_get << 16 | timing->da_hs_exit << 24;
254 timcon2 = 1 << 8 | timing->clk_hs_zero << 16 |
255 timing->clk_hs_trail << 24;
256 timcon3 = timing->clk_hs_prepare | timing->clk_hs_post << 8 |
257 timing->clk_hs_exit << 16;
259 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
260 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
261 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2);
262 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3);
265 static void mtk_dsi_enable(struct mtk_dsi *dsi)
267 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN);
270 static void mtk_dsi_disable(struct mtk_dsi *dsi)
272 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0);
275 static void mtk_dsi_reset_engine(struct mtk_dsi *dsi)
277 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET);
278 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0);
281 static void mtk_dsi_reset_dphy(struct mtk_dsi *dsi)
283 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, DPHY_RESET);
284 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, 0);
287 static void mtk_dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi)
289 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
290 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
293 static void mtk_dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi)
295 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
296 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN);
297 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0);
300 static void mtk_dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi)
302 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0);
303 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
306 static void mtk_dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi)
308 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
309 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN);
310 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0);
313 static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
315 return readl(dsi->regs + DSI_PHY_LCCON) & LC_HS_TX_EN;
318 static void mtk_dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
320 if (enter && !mtk_dsi_clk_hs_state(dsi))
321 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN);
322 else if (!enter && mtk_dsi_clk_hs_state(dsi))
323 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
326 static void mtk_dsi_set_mode(struct mtk_dsi *dsi)
328 u32 vid_mode = CMD_MODE;
330 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
331 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
332 vid_mode = BURST_MODE;
333 else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
334 vid_mode = SYNC_PULSE_MODE;
336 vid_mode = SYNC_EVENT_MODE;
339 writel(vid_mode, dsi->regs + DSI_MODE_CTRL);
342 static void mtk_dsi_set_vm_cmd(struct mtk_dsi *dsi)
344 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, VM_CMD_EN, VM_CMD_EN);
345 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, TS_VFP_EN, TS_VFP_EN);
348 static void mtk_dsi_ps_control_vact(struct mtk_dsi *dsi)
350 struct videomode *vm = &dsi->vm;
351 u32 dsi_buf_bpp, ps_wc;
354 if (dsi->format == MIPI_DSI_FMT_RGB565)
359 ps_wc = vm->hactive * dsi_buf_bpp;
362 switch (dsi->format) {
363 case MIPI_DSI_FMT_RGB888:
364 ps_bpp_mode |= PACKED_PS_24BIT_RGB888;
366 case MIPI_DSI_FMT_RGB666:
367 ps_bpp_mode |= PACKED_PS_18BIT_RGB666;
369 case MIPI_DSI_FMT_RGB666_PACKED:
370 ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666;
372 case MIPI_DSI_FMT_RGB565:
373 ps_bpp_mode |= PACKED_PS_16BIT_RGB565;
377 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
378 writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL);
379 writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC);
382 static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi)
386 switch (dsi->lanes) {
404 if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
405 tmp_reg |= HSTX_CKLP_EN;
407 if (!(dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET))
410 writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
413 static void mtk_dsi_ps_control(struct mtk_dsi *dsi)
418 switch (dsi->format) {
419 case MIPI_DSI_FMT_RGB888:
420 tmp_reg = PACKED_PS_24BIT_RGB888;
423 case MIPI_DSI_FMT_RGB666:
424 tmp_reg = LOOSELY_PS_18BIT_RGB666;
427 case MIPI_DSI_FMT_RGB666_PACKED:
428 tmp_reg = PACKED_PS_18BIT_RGB666;
431 case MIPI_DSI_FMT_RGB565:
432 tmp_reg = PACKED_PS_16BIT_RGB565;
436 tmp_reg = PACKED_PS_24BIT_RGB888;
441 tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC;
442 writel(tmp_reg, dsi->regs + DSI_PSCTRL);
445 static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
447 u32 horizontal_sync_active_byte;
448 u32 horizontal_backporch_byte;
449 u32 horizontal_frontporch_byte;
450 u32 horizontal_front_back_byte;
451 u32 data_phy_cycles_byte;
452 u32 dsi_tmp_buf_bpp, data_phy_cycles;
454 struct mtk_phy_timing *timing = &dsi->phy_timing;
456 struct videomode *vm = &dsi->vm;
458 if (dsi->format == MIPI_DSI_FMT_RGB565)
463 writel(vm->vsync_len, dsi->regs + DSI_VSA_NL);
464 writel(vm->vback_porch, dsi->regs + DSI_VBP_NL);
465 writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
466 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
468 if (dsi->driver_data->has_size_ctl)
469 writel(vm->vactive << 16 | vm->hactive,
470 dsi->regs + DSI_SIZE_CON);
472 horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
474 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
475 horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp - 10;
477 horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
478 dsi_tmp_buf_bpp - 10;
480 data_phy_cycles = timing->lpx + timing->da_hs_prepare +
481 timing->da_hs_zero + timing->da_hs_exit + 3;
483 delta = dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST ? 18 : 12;
484 delta += dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET ? 2 : 0;
486 horizontal_frontporch_byte = vm->hfront_porch * dsi_tmp_buf_bpp;
487 horizontal_front_back_byte = horizontal_frontporch_byte + horizontal_backporch_byte;
488 data_phy_cycles_byte = data_phy_cycles * dsi->lanes + delta;
490 if (horizontal_front_back_byte > data_phy_cycles_byte) {
491 horizontal_frontporch_byte -= data_phy_cycles_byte *
492 horizontal_frontporch_byte /
493 horizontal_front_back_byte;
495 horizontal_backporch_byte -= data_phy_cycles_byte *
496 horizontal_backporch_byte /
497 horizontal_front_back_byte;
499 DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n");
502 writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
503 writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
504 writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
506 mtk_dsi_ps_control(dsi);
509 static void mtk_dsi_start(struct mtk_dsi *dsi)
511 writel(0, dsi->regs + DSI_START);
512 writel(1, dsi->regs + DSI_START);
515 static void mtk_dsi_stop(struct mtk_dsi *dsi)
517 writel(0, dsi->regs + DSI_START);
520 static void mtk_dsi_set_cmd_mode(struct mtk_dsi *dsi)
522 writel(CMD_MODE, dsi->regs + DSI_MODE_CTRL);
525 static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi)
527 u32 inten = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
529 writel(inten, dsi->regs + DSI_INTEN);
532 static void mtk_dsi_irq_data_set(struct mtk_dsi *dsi, u32 irq_bit)
534 dsi->irq_data |= irq_bit;
537 static void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit)
539 dsi->irq_data &= ~irq_bit;
542 static s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag,
543 unsigned int timeout)
546 unsigned long jiffies = msecs_to_jiffies(timeout);
548 ret = wait_event_interruptible_timeout(dsi->irq_wait_queue,
549 dsi->irq_data & irq_flag,
552 DRM_WARN("Wait DSI IRQ(0x%08x) Timeout\n", irq_flag);
555 mtk_dsi_reset_engine(dsi);
561 static irqreturn_t mtk_dsi_irq(int irq, void *dev_id)
563 struct mtk_dsi *dsi = dev_id;
565 u32 flag = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
567 status = readl(dsi->regs + DSI_INTSTA) & flag;
571 mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK);
572 tmp = readl(dsi->regs + DSI_INTSTA);
573 } while (tmp & DSI_BUSY);
575 mtk_dsi_mask(dsi, DSI_INTSTA, status, 0);
576 mtk_dsi_irq_data_set(dsi, status);
577 wake_up_interruptible(&dsi->irq_wait_queue);
583 static s32 mtk_dsi_switch_to_cmd_mode(struct mtk_dsi *dsi, u8 irq_flag, u32 t)
585 mtk_dsi_irq_data_clear(dsi, irq_flag);
586 mtk_dsi_set_cmd_mode(dsi);
588 if (!mtk_dsi_wait_for_irq_done(dsi, irq_flag, t)) {
589 DRM_ERROR("failed to switch cmd mode\n");
596 static int mtk_dsi_poweron(struct mtk_dsi *dsi)
598 struct device *dev = dsi->host.dev;
602 if (++dsi->refcount != 1)
605 switch (dsi->format) {
606 case MIPI_DSI_FMT_RGB565:
609 case MIPI_DSI_FMT_RGB666_PACKED:
612 case MIPI_DSI_FMT_RGB666:
613 case MIPI_DSI_FMT_RGB888:
619 dsi->data_rate = DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel,
622 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
624 dev_err(dev, "Failed to set data rate: %d\n", ret);
628 phy_power_on(dsi->phy);
630 ret = clk_prepare_enable(dsi->engine_clk);
632 dev_err(dev, "Failed to enable engine clock: %d\n", ret);
633 goto err_phy_power_off;
636 ret = clk_prepare_enable(dsi->digital_clk);
638 dev_err(dev, "Failed to enable digital clock: %d\n", ret);
639 goto err_disable_engine_clk;
644 if (dsi->driver_data->has_shadow_ctl)
645 writel(FORCE_COMMIT | BYPASS_SHADOW,
646 dsi->regs + DSI_SHADOW_DEBUG);
648 mtk_dsi_reset_engine(dsi);
649 mtk_dsi_phy_timconfig(dsi);
651 mtk_dsi_rxtx_control(dsi);
652 usleep_range(30, 100);
653 mtk_dsi_reset_dphy(dsi);
654 mtk_dsi_ps_control_vact(dsi);
655 mtk_dsi_set_vm_cmd(dsi);
656 mtk_dsi_config_vdo_timing(dsi);
657 mtk_dsi_set_interrupt_enable(dsi);
659 mtk_dsi_clk_ulp_mode_leave(dsi);
660 mtk_dsi_lane0_ulp_mode_leave(dsi);
661 mtk_dsi_clk_hs_mode(dsi, 0);
664 err_disable_engine_clk:
665 clk_disable_unprepare(dsi->engine_clk);
667 phy_power_off(dsi->phy);
673 static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
675 if (WARN_ON(dsi->refcount == 0))
678 if (--dsi->refcount != 0)
682 * mtk_dsi_stop() and mtk_dsi_start() is asymmetric, since
683 * mtk_dsi_stop() should be called after mtk_drm_crtc_atomic_disable(),
684 * which needs irq for vblank, and mtk_dsi_stop() will disable irq.
685 * mtk_dsi_start() needs to be called in mtk_output_dsi_enable(),
686 * after dsi is fully set.
690 mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500);
691 mtk_dsi_reset_engine(dsi);
692 mtk_dsi_lane0_ulp_mode_enter(dsi);
693 mtk_dsi_clk_ulp_mode_enter(dsi);
695 mtk_dsi_disable(dsi);
697 clk_disable_unprepare(dsi->engine_clk);
698 clk_disable_unprepare(dsi->digital_clk);
700 phy_power_off(dsi->phy);
703 static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
710 ret = mtk_dsi_poweron(dsi);
712 DRM_ERROR("failed to power on dsi\n");
716 mtk_dsi_set_mode(dsi);
717 mtk_dsi_clk_hs_mode(dsi, 1);
724 static void mtk_output_dsi_disable(struct mtk_dsi *dsi)
729 mtk_dsi_poweroff(dsi);
731 dsi->enabled = false;
734 static int mtk_dsi_bridge_attach(struct drm_bridge *bridge,
735 enum drm_bridge_attach_flags flags)
737 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
739 /* Attach the panel or bridge to the dsi bridge */
740 return drm_bridge_attach(bridge->encoder, dsi->next_bridge,
741 &dsi->bridge, flags);
744 static void mtk_dsi_bridge_mode_set(struct drm_bridge *bridge,
745 const struct drm_display_mode *mode,
746 const struct drm_display_mode *adjusted)
748 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
750 drm_display_mode_to_videomode(adjusted, &dsi->vm);
753 static void mtk_dsi_bridge_disable(struct drm_bridge *bridge)
755 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
757 mtk_output_dsi_disable(dsi);
760 static void mtk_dsi_bridge_enable(struct drm_bridge *bridge)
762 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
764 mtk_output_dsi_enable(dsi);
767 static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = {
768 .attach = mtk_dsi_bridge_attach,
769 .disable = mtk_dsi_bridge_disable,
770 .enable = mtk_dsi_bridge_enable,
771 .mode_set = mtk_dsi_bridge_mode_set,
774 void mtk_dsi_ddp_start(struct device *dev)
776 struct mtk_dsi *dsi = dev_get_drvdata(dev);
778 mtk_dsi_poweron(dsi);
781 void mtk_dsi_ddp_stop(struct device *dev)
783 struct mtk_dsi *dsi = dev_get_drvdata(dev);
785 mtk_dsi_poweroff(dsi);
788 static int mtk_dsi_host_attach(struct mipi_dsi_host *host,
789 struct mipi_dsi_device *device)
791 struct mtk_dsi *dsi = host_to_dsi(host);
793 dsi->lanes = device->lanes;
794 dsi->format = device->format;
795 dsi->mode_flags = device->mode_flags;
800 static void mtk_dsi_wait_for_idle(struct mtk_dsi *dsi)
805 ret = readl_poll_timeout(dsi->regs + DSI_INTSTA, val, !(val & DSI_BUSY),
808 DRM_WARN("polling dsi wait not busy timeout!\n");
811 mtk_dsi_reset_engine(dsi);
815 static u32 mtk_dsi_recv_cnt(u8 type, u8 *read_data)
818 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
819 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
821 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
822 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
824 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
825 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
826 return read_data[1] + read_data[2] * 16;
827 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
828 DRM_INFO("type is 0x02, try again\n");
831 DRM_INFO("type(0x%x) not recognized\n", type);
838 static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
840 const char *tx_buf = msg->tx_buf;
841 u8 config, cmdq_size, cmdq_off, type = msg->type;
842 u32 reg_val, cmdq_mask, i;
843 u32 reg_cmdq_off = dsi->driver_data->reg_cmdq_off;
845 if (MTK_DSI_HOST_IS_READ(type))
848 config = (msg->tx_len > 2) ? LONG_PACKET : SHORT_PACKET;
850 if (msg->tx_len > 2) {
851 cmdq_size = 1 + (msg->tx_len + 3) / 4;
853 cmdq_mask = CONFIG | DATA_ID | DATA_0 | DATA_1;
854 reg_val = (msg->tx_len << 16) | (type << 8) | config;
858 cmdq_mask = CONFIG | DATA_ID;
859 reg_val = (type << 8) | config;
862 for (i = 0; i < msg->tx_len; i++)
863 mtk_dsi_mask(dsi, (reg_cmdq_off + cmdq_off + i) & (~0x3U),
864 (0xffUL << (((i + cmdq_off) & 3U) * 8U)),
865 tx_buf[i] << (((i + cmdq_off) & 3U) * 8U));
867 mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
868 mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
871 static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
872 const struct mipi_dsi_msg *msg, u8 flag)
874 mtk_dsi_wait_for_idle(dsi);
875 mtk_dsi_irq_data_clear(dsi, flag);
876 mtk_dsi_cmdq(dsi, msg);
879 if (!mtk_dsi_wait_for_irq_done(dsi, flag, 2000))
885 static ssize_t mtk_dsi_host_transfer(struct mipi_dsi_host *host,
886 const struct mipi_dsi_msg *msg)
888 struct mtk_dsi *dsi = host_to_dsi(host);
892 u8 irq_flag = CMD_DONE_INT_FLAG;
894 if (readl(dsi->regs + DSI_MODE_CTRL) & MODE) {
895 DRM_ERROR("dsi engine is not command mode\n");
899 if (MTK_DSI_HOST_IS_READ(msg->type))
900 irq_flag |= LPRX_RD_RDY_INT_FLAG;
902 if (mtk_dsi_host_send_cmd(dsi, msg, irq_flag) < 0)
905 if (!MTK_DSI_HOST_IS_READ(msg->type))
909 DRM_ERROR("dsi receive buffer size may be NULL\n");
913 for (i = 0; i < 16; i++)
914 *(read_data + i) = readb(dsi->regs + DSI_RX_DATA0 + i);
916 recv_cnt = mtk_dsi_recv_cnt(read_data[0], read_data);
919 src_addr = &read_data[4];
921 src_addr = &read_data[1];
926 if (recv_cnt > msg->rx_len)
927 recv_cnt = msg->rx_len;
930 memcpy(msg->rx_buf, src_addr, recv_cnt);
932 DRM_INFO("dsi get %d byte data from the panel address(0x%x)\n",
933 recv_cnt, *((u8 *)(msg->tx_buf)));
938 static const struct mipi_dsi_host_ops mtk_dsi_ops = {
939 .attach = mtk_dsi_host_attach,
940 .transfer = mtk_dsi_host_transfer,
943 static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
947 ret = drm_simple_encoder_init(drm, &dsi->encoder,
948 DRM_MODE_ENCODER_DSI);
950 DRM_ERROR("Failed to encoder init to drm\n");
954 dsi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm, dsi->host.dev);
956 ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL,
957 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
959 goto err_cleanup_encoder;
961 dsi->connector = drm_bridge_connector_init(drm, &dsi->encoder);
962 if (IS_ERR(dsi->connector)) {
963 DRM_ERROR("Unable to create bridge connector\n");
964 ret = PTR_ERR(dsi->connector);
965 goto err_cleanup_encoder;
967 drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
972 drm_encoder_cleanup(&dsi->encoder);
976 static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
979 struct drm_device *drm = data;
980 struct mtk_dsi *dsi = dev_get_drvdata(dev);
982 ret = mtk_dsi_encoder_init(drm, dsi);
987 static void mtk_dsi_unbind(struct device *dev, struct device *master,
990 struct mtk_dsi *dsi = dev_get_drvdata(dev);
992 drm_encoder_cleanup(&dsi->encoder);
995 static const struct component_ops mtk_dsi_component_ops = {
996 .bind = mtk_dsi_bind,
997 .unbind = mtk_dsi_unbind,
1000 static int mtk_dsi_probe(struct platform_device *pdev)
1002 struct mtk_dsi *dsi;
1003 struct device *dev = &pdev->dev;
1004 struct drm_panel *panel;
1005 struct resource *regs;
1009 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
1013 dsi->host.ops = &mtk_dsi_ops;
1014 dsi->host.dev = dev;
1015 ret = mipi_dsi_host_register(&dsi->host);
1017 dev_err(dev, "failed to register DSI host: %d\n", ret);
1021 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
1022 &panel, &dsi->next_bridge);
1024 goto err_unregister_host;
1027 dsi->next_bridge = devm_drm_panel_bridge_add(dev, panel);
1028 if (IS_ERR(dsi->next_bridge)) {
1029 ret = PTR_ERR(dsi->next_bridge);
1030 goto err_unregister_host;
1034 dsi->driver_data = of_device_get_match_data(dev);
1036 dsi->engine_clk = devm_clk_get(dev, "engine");
1037 if (IS_ERR(dsi->engine_clk)) {
1038 ret = PTR_ERR(dsi->engine_clk);
1040 if (ret != -EPROBE_DEFER)
1041 dev_err(dev, "Failed to get engine clock: %d\n", ret);
1042 goto err_unregister_host;
1045 dsi->digital_clk = devm_clk_get(dev, "digital");
1046 if (IS_ERR(dsi->digital_clk)) {
1047 ret = PTR_ERR(dsi->digital_clk);
1049 if (ret != -EPROBE_DEFER)
1050 dev_err(dev, "Failed to get digital clock: %d\n", ret);
1051 goto err_unregister_host;
1054 dsi->hs_clk = devm_clk_get(dev, "hs");
1055 if (IS_ERR(dsi->hs_clk)) {
1056 ret = PTR_ERR(dsi->hs_clk);
1057 dev_err(dev, "Failed to get hs clock: %d\n", ret);
1058 goto err_unregister_host;
1061 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1062 dsi->regs = devm_ioremap_resource(dev, regs);
1063 if (IS_ERR(dsi->regs)) {
1064 ret = PTR_ERR(dsi->regs);
1065 dev_err(dev, "Failed to ioremap memory: %d\n", ret);
1066 goto err_unregister_host;
1069 dsi->phy = devm_phy_get(dev, "dphy");
1070 if (IS_ERR(dsi->phy)) {
1071 ret = PTR_ERR(dsi->phy);
1072 dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret);
1073 goto err_unregister_host;
1076 irq_num = platform_get_irq(pdev, 0);
1078 dev_err(&pdev->dev, "failed to get dsi irq_num: %d\n", irq_num);
1080 goto err_unregister_host;
1083 ret = devm_request_irq(&pdev->dev, irq_num, mtk_dsi_irq,
1084 IRQF_TRIGGER_NONE, dev_name(&pdev->dev), dsi);
1086 dev_err(&pdev->dev, "failed to request mediatek dsi irq\n");
1087 goto err_unregister_host;
1090 init_waitqueue_head(&dsi->irq_wait_queue);
1092 platform_set_drvdata(pdev, dsi);
1094 dsi->bridge.funcs = &mtk_dsi_bridge_funcs;
1095 dsi->bridge.of_node = dev->of_node;
1096 dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
1098 drm_bridge_add(&dsi->bridge);
1100 ret = component_add(&pdev->dev, &mtk_dsi_component_ops);
1102 dev_err(&pdev->dev, "failed to add component: %d\n", ret);
1103 goto err_unregister_host;
1108 err_unregister_host:
1109 mipi_dsi_host_unregister(&dsi->host);
1113 static int mtk_dsi_remove(struct platform_device *pdev)
1115 struct mtk_dsi *dsi = platform_get_drvdata(pdev);
1117 mtk_output_dsi_disable(dsi);
1118 drm_bridge_remove(&dsi->bridge);
1119 component_del(&pdev->dev, &mtk_dsi_component_ops);
1120 mipi_dsi_host_unregister(&dsi->host);
1125 static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = {
1126 .reg_cmdq_off = 0x200,
1129 static const struct mtk_dsi_driver_data mt2701_dsi_driver_data = {
1130 .reg_cmdq_off = 0x180,
1133 static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
1134 .reg_cmdq_off = 0x200,
1135 .has_shadow_ctl = true,
1136 .has_size_ctl = true,
1139 static const struct of_device_id mtk_dsi_of_match[] = {
1140 { .compatible = "mediatek,mt2701-dsi",
1141 .data = &mt2701_dsi_driver_data },
1142 { .compatible = "mediatek,mt8173-dsi",
1143 .data = &mt8173_dsi_driver_data },
1144 { .compatible = "mediatek,mt8183-dsi",
1145 .data = &mt8183_dsi_driver_data },
1148 MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);
1150 struct platform_driver mtk_dsi_driver = {
1151 .probe = mtk_dsi_probe,
1152 .remove = mtk_dsi_remove,
1155 .of_match_table = mtk_dsi_of_match,