2 * Samsung SoC MIPI DSI Master driver.
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 * Contacts: Tomasz Figa <t.figa@samsung.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
14 #include <drm/drm_crtc_helper.h>
15 #include <drm/drm_mipi_dsi.h>
16 #include <drm/drm_panel.h>
17 #include <drm/drm_atomic_helper.h>
19 #include <linux/clk.h>
20 #include <linux/gpio/consumer.h>
21 #include <linux/irq.h>
22 #include <linux/of_device.h>
23 #include <linux/of_gpio.h>
24 #include <linux/phy/phy.h>
25 #include <linux/regulator/consumer.h>
26 #include <linux/component.h>
28 #include <video/mipi_display.h>
29 #include <video/videomode.h>
31 #include "exynos_drm_crtc.h"
32 #include "exynos_drm_drv.h"
34 /* returns true iff both arguments logically differs */
35 #define NEQV(a, b) (!(a) ^ !(b))
37 #define DSIM_STATUS_REG 0x0 /* Status register */
38 #define DSIM_SWRST_REG 0x4 /* Software reset register */
39 #define DSIM_CLKCTRL_REG 0x8 /* Clock control register */
40 #define DSIM_TIMEOUT_REG 0xc /* Time out register */
41 #define DSIM_CONFIG_REG 0x10 /* Configuration register */
42 #define DSIM_ESCMODE_REG 0x14 /* Escape mode register */
44 /* Main display image resolution register */
45 #define DSIM_MDRESOL_REG 0x18
46 #define DSIM_MVPORCH_REG 0x1c /* Main display Vporch register */
47 #define DSIM_MHPORCH_REG 0x20 /* Main display Hporch register */
48 #define DSIM_MSYNC_REG 0x24 /* Main display sync area register */
50 /* Sub display image resolution register */
51 #define DSIM_SDRESOL_REG 0x28
52 #define DSIM_INTSRC_REG 0x2c /* Interrupt source register */
53 #define DSIM_INTMSK_REG 0x30 /* Interrupt mask register */
54 #define DSIM_PKTHDR_REG 0x34 /* Packet Header FIFO register */
55 #define DSIM_PAYLOAD_REG 0x38 /* Payload FIFO register */
56 #define DSIM_RXFIFO_REG 0x3c /* Read FIFO register */
57 #define DSIM_FIFOTHLD_REG 0x40 /* FIFO threshold level register */
58 #define DSIM_FIFOCTRL_REG 0x44 /* FIFO status and control register */
60 /* FIFO memory AC characteristic register */
61 #define DSIM_PLLCTRL_REG 0x4c /* PLL control register */
62 #define DSIM_PHYACCHR_REG 0x54 /* D-PHY AC characteristic register */
63 #define DSIM_PHYACCHR1_REG 0x58 /* D-PHY AC characteristic register1 */
64 #define DSIM_PHYCTRL_REG 0x5c
65 #define DSIM_PHYTIMING_REG 0x64
66 #define DSIM_PHYTIMING1_REG 0x68
67 #define DSIM_PHYTIMING2_REG 0x6c
70 #define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
71 #define DSIM_STOP_STATE_CLK (1 << 8)
72 #define DSIM_TX_READY_HS_CLK (1 << 10)
73 #define DSIM_PLL_STABLE (1 << 31)
76 #define DSIM_FUNCRST (1 << 16)
77 #define DSIM_SWRST (1 << 0)
80 #define DSIM_LPDR_TIMEOUT(x) ((x) << 0)
81 #define DSIM_BTA_TIMEOUT(x) ((x) << 16)
84 #define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
85 #define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
86 #define DSIM_LANE_ESC_CLK_EN_CLK (1 << 19)
87 #define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
88 #define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
89 #define DSIM_BYTE_CLKEN (1 << 24)
90 #define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
91 #define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
92 #define DSIM_PLL_BYPASS (1 << 27)
93 #define DSIM_ESC_CLKEN (1 << 28)
94 #define DSIM_TX_REQUEST_HSCLK (1 << 31)
97 #define DSIM_LANE_EN_CLK (1 << 0)
98 #define DSIM_LANE_EN(x) (((x) & 0xf) << 1)
99 #define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5)
100 #define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8)
101 #define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12)
102 #define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12)
103 #define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12)
104 #define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12)
105 #define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12)
106 #define DSIM_SUB_VC (((x) & 0x3) << 16)
107 #define DSIM_MAIN_VC (((x) & 0x3) << 18)
108 #define DSIM_HSA_MODE (1 << 20)
109 #define DSIM_HBP_MODE (1 << 21)
110 #define DSIM_HFP_MODE (1 << 22)
111 #define DSIM_HSE_MODE (1 << 23)
112 #define DSIM_AUTO_MODE (1 << 24)
113 #define DSIM_VIDEO_MODE (1 << 25)
114 #define DSIM_BURST_MODE (1 << 26)
115 #define DSIM_SYNC_INFORM (1 << 27)
116 #define DSIM_EOT_DISABLE (1 << 28)
117 #define DSIM_MFLUSH_VS (1 << 29)
118 /* This flag is valid only for exynos3250/3472/4415/5260/5430 */
119 #define DSIM_CLKLANE_STOP (1 << 30)
122 #define DSIM_TX_TRIGGER_RST (1 << 4)
123 #define DSIM_TX_LPDT_LP (1 << 6)
124 #define DSIM_CMD_LPDT_LP (1 << 7)
125 #define DSIM_FORCE_BTA (1 << 16)
126 #define DSIM_FORCE_STOP_STATE (1 << 20)
127 #define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21)
128 #define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21)
131 #define DSIM_MAIN_STAND_BY (1 << 31)
132 #define DSIM_MAIN_VRESOL(x) (((x) & 0x7ff) << 16)
133 #define DSIM_MAIN_HRESOL(x) (((x) & 0X7ff) << 0)
136 #define DSIM_CMD_ALLOW(x) ((x) << 28)
137 #define DSIM_STABLE_VFP(x) ((x) << 16)
138 #define DSIM_MAIN_VBP(x) ((x) << 0)
139 #define DSIM_CMD_ALLOW_MASK (0xf << 28)
140 #define DSIM_STABLE_VFP_MASK (0x7ff << 16)
141 #define DSIM_MAIN_VBP_MASK (0x7ff << 0)
144 #define DSIM_MAIN_HFP(x) ((x) << 16)
145 #define DSIM_MAIN_HBP(x) ((x) << 0)
146 #define DSIM_MAIN_HFP_MASK ((0xffff) << 16)
147 #define DSIM_MAIN_HBP_MASK ((0xffff) << 0)
150 #define DSIM_MAIN_VSA(x) ((x) << 22)
151 #define DSIM_MAIN_HSA(x) ((x) << 0)
152 #define DSIM_MAIN_VSA_MASK ((0x3ff) << 22)
153 #define DSIM_MAIN_HSA_MASK ((0xffff) << 0)
156 #define DSIM_SUB_STANDY(x) ((x) << 31)
157 #define DSIM_SUB_VRESOL(x) ((x) << 16)
158 #define DSIM_SUB_HRESOL(x) ((x) << 0)
159 #define DSIM_SUB_STANDY_MASK ((0x1) << 31)
160 #define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16)
161 #define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0)
164 #define DSIM_INT_PLL_STABLE (1 << 31)
165 #define DSIM_INT_SW_RST_RELEASE (1 << 30)
166 #define DSIM_INT_SFR_FIFO_EMPTY (1 << 29)
167 #define DSIM_INT_BTA (1 << 25)
168 #define DSIM_INT_FRAME_DONE (1 << 24)
169 #define DSIM_INT_RX_TIMEOUT (1 << 21)
170 #define DSIM_INT_BTA_TIMEOUT (1 << 20)
171 #define DSIM_INT_RX_DONE (1 << 18)
172 #define DSIM_INT_RX_TE (1 << 17)
173 #define DSIM_INT_RX_ACK (1 << 16)
174 #define DSIM_INT_RX_ECC_ERR (1 << 15)
175 #define DSIM_INT_RX_CRC_ERR (1 << 14)
178 #define DSIM_RX_DATA_FULL (1 << 25)
179 #define DSIM_RX_DATA_EMPTY (1 << 24)
180 #define DSIM_SFR_HEADER_FULL (1 << 23)
181 #define DSIM_SFR_HEADER_EMPTY (1 << 22)
182 #define DSIM_SFR_PAYLOAD_FULL (1 << 21)
183 #define DSIM_SFR_PAYLOAD_EMPTY (1 << 20)
184 #define DSIM_I80_HEADER_FULL (1 << 19)
185 #define DSIM_I80_HEADER_EMPTY (1 << 18)
186 #define DSIM_I80_PAYLOAD_FULL (1 << 17)
187 #define DSIM_I80_PAYLOAD_EMPTY (1 << 16)
188 #define DSIM_SD_HEADER_FULL (1 << 15)
189 #define DSIM_SD_HEADER_EMPTY (1 << 14)
190 #define DSIM_SD_PAYLOAD_FULL (1 << 13)
191 #define DSIM_SD_PAYLOAD_EMPTY (1 << 12)
192 #define DSIM_MD_HEADER_FULL (1 << 11)
193 #define DSIM_MD_HEADER_EMPTY (1 << 10)
194 #define DSIM_MD_PAYLOAD_FULL (1 << 9)
195 #define DSIM_MD_PAYLOAD_EMPTY (1 << 8)
196 #define DSIM_RX_FIFO (1 << 4)
197 #define DSIM_SFR_FIFO (1 << 3)
198 #define DSIM_I80_FIFO (1 << 2)
199 #define DSIM_SD_FIFO (1 << 1)
200 #define DSIM_MD_FIFO (1 << 0)
203 #define DSIM_AFC_EN (1 << 14)
204 #define DSIM_AFC_CTL(x) (((x) & 0x7) << 5)
207 #define DSIM_FREQ_BAND(x) ((x) << 24)
208 #define DSIM_PLL_EN (1 << 23)
209 #define DSIM_PLL_P(x) ((x) << 13)
210 #define DSIM_PLL_M(x) ((x) << 4)
211 #define DSIM_PLL_S(x) ((x) << 1)
214 #define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0)
217 #define DSIM_PHYTIMING_LPX(x) ((x) << 8)
218 #define DSIM_PHYTIMING_HS_EXIT(x) ((x) << 0)
220 /* DSIM_PHYTIMING1 */
221 #define DSIM_PHYTIMING1_CLK_PREPARE(x) ((x) << 24)
222 #define DSIM_PHYTIMING1_CLK_ZERO(x) ((x) << 16)
223 #define DSIM_PHYTIMING1_CLK_POST(x) ((x) << 8)
224 #define DSIM_PHYTIMING1_CLK_TRAIL(x) ((x) << 0)
226 /* DSIM_PHYTIMING2 */
227 #define DSIM_PHYTIMING2_HS_PREPARE(x) ((x) << 16)
228 #define DSIM_PHYTIMING2_HS_ZERO(x) ((x) << 8)
229 #define DSIM_PHYTIMING2_HS_TRAIL(x) ((x) << 0)
231 #define DSI_MAX_BUS_WIDTH 4
232 #define DSI_NUM_VIRTUAL_CHANNELS 4
233 #define DSI_TX_FIFO_SIZE 2048
234 #define DSI_RX_FIFO_SIZE 256
235 #define DSI_XFER_TIMEOUT_MS 100
236 #define DSI_RX_FIFO_EMPTY 0x30800002
238 enum exynos_dsi_transfer_type
{
243 struct exynos_dsi_transfer
{
244 struct list_head list
;
245 struct completion completed
;
251 const u8
*tx_payload
;
260 #define DSIM_STATE_ENABLED BIT(0)
261 #define DSIM_STATE_INITIALIZED BIT(1)
262 #define DSIM_STATE_CMD_LPM BIT(2)
264 struct exynos_dsi_driver_data
{
265 unsigned int plltmr_reg
;
267 unsigned int has_freqband
:1;
268 unsigned int has_clklane_stop
:1;
272 struct exynos_drm_display display
;
273 struct mipi_dsi_host dsi_host
;
274 struct drm_connector connector
;
275 struct device_node
*panel_node
;
276 struct drm_panel
*panel
;
279 void __iomem
*reg_base
;
283 struct regulator_bulk_data supplies
[2];
296 struct drm_property
*brightness
;
297 struct completion completed
;
299 spinlock_t transfer_lock
; /* protects transfer_list */
300 struct list_head transfer_list
;
302 struct exynos_dsi_driver_data
*driver_data
;
305 #define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
306 #define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector)
308 static inline struct exynos_dsi
*display_to_dsi(struct exynos_drm_display
*d
)
310 return container_of(d
, struct exynos_dsi
, display
);
313 static struct exynos_dsi_driver_data exynos3_dsi_driver_data
= {
316 .has_clklane_stop
= 1,
319 static struct exynos_dsi_driver_data exynos4_dsi_driver_data
= {
322 .has_clklane_stop
= 1,
325 static struct exynos_dsi_driver_data exynos4415_dsi_driver_data
= {
327 .has_clklane_stop
= 1,
330 static struct exynos_dsi_driver_data exynos5_dsi_driver_data
= {
334 static struct of_device_id exynos_dsi_of_match
[] = {
335 { .compatible
= "samsung,exynos3250-mipi-dsi",
336 .data
= &exynos3_dsi_driver_data
},
337 { .compatible
= "samsung,exynos4210-mipi-dsi",
338 .data
= &exynos4_dsi_driver_data
},
339 { .compatible
= "samsung,exynos4415-mipi-dsi",
340 .data
= &exynos4415_dsi_driver_data
},
341 { .compatible
= "samsung,exynos5410-mipi-dsi",
342 .data
= &exynos5_dsi_driver_data
},
346 static inline struct exynos_dsi_driver_data
*exynos_dsi_get_driver_data(
347 struct platform_device
*pdev
)
349 const struct of_device_id
*of_id
=
350 of_match_device(exynos_dsi_of_match
, &pdev
->dev
);
352 return (struct exynos_dsi_driver_data
*)of_id
->data
;
355 static void exynos_dsi_wait_for_reset(struct exynos_dsi
*dsi
)
357 if (wait_for_completion_timeout(&dsi
->completed
, msecs_to_jiffies(300)))
360 dev_err(dsi
->dev
, "timeout waiting for reset\n");
363 static void exynos_dsi_reset(struct exynos_dsi
*dsi
)
365 reinit_completion(&dsi
->completed
);
366 writel(DSIM_SWRST
, dsi
->reg_base
+ DSIM_SWRST_REG
);
370 #define MHZ (1000*1000)
373 static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi
*dsi
,
374 unsigned long fin
, unsigned long fout
, u8
*p
, u16
*m
, u8
*s
)
376 unsigned long best_freq
= 0;
377 u32 min_delta
= 0xffffffff;
379 u8 _p
, uninitialized_var(best_p
);
380 u16 _m
, uninitialized_var(best_m
);
381 u8 _s
, uninitialized_var(best_s
);
383 p_min
= DIV_ROUND_UP(fin
, (12 * MHZ
));
384 p_max
= fin
/ (6 * MHZ
);
386 for (_p
= p_min
; _p
<= p_max
; ++_p
) {
387 for (_s
= 0; _s
<= 5; ++_s
) {
391 tmp
= (u64
)fout
* (_p
<< _s
);
394 if (_m
< 41 || _m
> 125)
399 if (tmp
< 500 * MHZ
|| tmp
> 1000 * MHZ
)
403 do_div(tmp
, _p
<< _s
);
405 delta
= abs(fout
- tmp
);
406 if (delta
< min_delta
) {
425 static unsigned long exynos_dsi_set_pll(struct exynos_dsi
*dsi
,
428 struct exynos_dsi_driver_data
*driver_data
= dsi
->driver_data
;
429 unsigned long fin
, fout
;
435 clk_set_rate(dsi
->pll_clk
, dsi
->pll_clk_rate
);
437 fin
= clk_get_rate(dsi
->pll_clk
);
439 dev_err(dsi
->dev
, "failed to get PLL clock frequency\n");
443 dev_dbg(dsi
->dev
, "PLL input frequency: %lu\n", fin
);
445 fout
= exynos_dsi_pll_find_pms(dsi
, fin
, freq
, &p
, &m
, &s
);
448 "failed to find PLL PMS for requested frequency\n");
451 dev_dbg(dsi
->dev
, "PLL freq %lu, (p %d, m %d, s %d)\n", fout
, p
, m
, s
);
453 writel(500, dsi
->reg_base
+ driver_data
->plltmr_reg
);
455 reg
= DSIM_PLL_EN
| DSIM_PLL_P(p
) | DSIM_PLL_M(m
) | DSIM_PLL_S(s
);
457 if (driver_data
->has_freqband
) {
458 static const unsigned long freq_bands
[] = {
459 100 * MHZ
, 120 * MHZ
, 160 * MHZ
, 200 * MHZ
,
460 270 * MHZ
, 320 * MHZ
, 390 * MHZ
, 450 * MHZ
,
461 510 * MHZ
, 560 * MHZ
, 640 * MHZ
, 690 * MHZ
,
462 770 * MHZ
, 870 * MHZ
, 950 * MHZ
,
466 for (band
= 0; band
< ARRAY_SIZE(freq_bands
); ++band
)
467 if (fout
< freq_bands
[band
])
470 dev_dbg(dsi
->dev
, "band %d\n", band
);
472 reg
|= DSIM_FREQ_BAND(band
);
475 writel(reg
, dsi
->reg_base
+ DSIM_PLLCTRL_REG
);
479 if (timeout
-- == 0) {
480 dev_err(dsi
->dev
, "PLL failed to stabilize\n");
483 reg
= readl(dsi
->reg_base
+ DSIM_STATUS_REG
);
484 } while ((reg
& DSIM_PLL_STABLE
) == 0);
489 static int exynos_dsi_enable_clock(struct exynos_dsi
*dsi
)
491 unsigned long hs_clk
, byte_clk
, esc_clk
;
492 unsigned long esc_div
;
495 hs_clk
= exynos_dsi_set_pll(dsi
, dsi
->burst_clk_rate
);
497 dev_err(dsi
->dev
, "failed to configure DSI PLL\n");
501 byte_clk
= hs_clk
/ 8;
502 esc_div
= DIV_ROUND_UP(byte_clk
, dsi
->esc_clk_rate
);
503 esc_clk
= byte_clk
/ esc_div
;
505 if (esc_clk
> 20 * MHZ
) {
507 esc_clk
= byte_clk
/ esc_div
;
510 dev_dbg(dsi
->dev
, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
511 hs_clk
, byte_clk
, esc_clk
);
513 reg
= readl(dsi
->reg_base
+ DSIM_CLKCTRL_REG
);
514 reg
&= ~(DSIM_ESC_PRESCALER_MASK
| DSIM_LANE_ESC_CLK_EN_CLK
515 | DSIM_LANE_ESC_CLK_EN_DATA_MASK
| DSIM_PLL_BYPASS
516 | DSIM_BYTE_CLK_SRC_MASK
);
517 reg
|= DSIM_ESC_CLKEN
| DSIM_BYTE_CLKEN
518 | DSIM_ESC_PRESCALER(esc_div
)
519 | DSIM_LANE_ESC_CLK_EN_CLK
520 | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi
->lanes
) - 1)
521 | DSIM_BYTE_CLK_SRC(0)
522 | DSIM_TX_REQUEST_HSCLK
;
523 writel(reg
, dsi
->reg_base
+ DSIM_CLKCTRL_REG
);
528 static void exynos_dsi_set_phy_ctrl(struct exynos_dsi
*dsi
)
530 struct exynos_dsi_driver_data
*driver_data
= dsi
->driver_data
;
533 if (driver_data
->has_freqband
)
536 /* B D-PHY: D-PHY Master & Slave Analog Block control */
537 reg
= DSIM_PHYCTRL_ULPS_EXIT(0x0af);
538 writel(reg
, dsi
->reg_base
+ DSIM_PHYCTRL_REG
);
541 * T LPX: Transmitted length of any Low-Power state period
542 * T HS-EXIT: Time that the transmitter drives LP-11 following a HS
545 reg
= DSIM_PHYTIMING_LPX(0x06) | DSIM_PHYTIMING_HS_EXIT(0x0b);
546 writel(reg
, dsi
->reg_base
+ DSIM_PHYTIMING_REG
);
549 * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00
550 * Line state immediately before the HS-0 Line state starting the
552 * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to
553 * transmitting the Clock.
554 * T CLK_POST: Time that the transmitter continues to send HS clock
555 * after the last associated Data Lane has transitioned to LP Mode
556 * Interval is defined as the period from the end of T HS-TRAIL to
557 * the beginning of T CLK-TRAIL
558 * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
559 * the last payload clock bit of a HS transmission burst
561 reg
= DSIM_PHYTIMING1_CLK_PREPARE(0x07) |
562 DSIM_PHYTIMING1_CLK_ZERO(0x27) |
563 DSIM_PHYTIMING1_CLK_POST(0x0d) |
564 DSIM_PHYTIMING1_CLK_TRAIL(0x08);
565 writel(reg
, dsi
->reg_base
+ DSIM_PHYTIMING1_REG
);
568 * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00
569 * Line state immediately before the HS-0 Line state starting the
571 * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to
572 * transmitting the Sync sequence.
573 * T HS-TRAIL: Time that the transmitter drives the flipped differential
574 * state after last payload data bit of a HS transmission burst
576 reg
= DSIM_PHYTIMING2_HS_PREPARE(0x09) | DSIM_PHYTIMING2_HS_ZERO(0x0d) |
577 DSIM_PHYTIMING2_HS_TRAIL(0x0b);
578 writel(reg
, dsi
->reg_base
+ DSIM_PHYTIMING2_REG
);
581 static void exynos_dsi_disable_clock(struct exynos_dsi
*dsi
)
585 reg
= readl(dsi
->reg_base
+ DSIM_CLKCTRL_REG
);
586 reg
&= ~(DSIM_LANE_ESC_CLK_EN_CLK
| DSIM_LANE_ESC_CLK_EN_DATA_MASK
587 | DSIM_ESC_CLKEN
| DSIM_BYTE_CLKEN
);
588 writel(reg
, dsi
->reg_base
+ DSIM_CLKCTRL_REG
);
590 reg
= readl(dsi
->reg_base
+ DSIM_PLLCTRL_REG
);
592 writel(reg
, dsi
->reg_base
+ DSIM_PLLCTRL_REG
);
595 static int exynos_dsi_init_link(struct exynos_dsi
*dsi
)
597 struct exynos_dsi_driver_data
*driver_data
= dsi
->driver_data
;
602 /* Initialize FIFO pointers */
603 reg
= readl(dsi
->reg_base
+ DSIM_FIFOCTRL_REG
);
605 writel(reg
, dsi
->reg_base
+ DSIM_FIFOCTRL_REG
);
607 usleep_range(9000, 11000);
610 writel(reg
, dsi
->reg_base
+ DSIM_FIFOCTRL_REG
);
612 usleep_range(9000, 11000);
614 /* DSI configuration */
618 * The first bit of mode_flags specifies display configuration.
619 * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video
620 * mode, otherwise it will support command mode.
622 if (dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO
) {
623 reg
|= DSIM_VIDEO_MODE
;
626 * The user manual describes that following bits are ignored in
629 if (!(dsi
->mode_flags
& MIPI_DSI_MODE_VSYNC_FLUSH
))
630 reg
|= DSIM_MFLUSH_VS
;
631 if (dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_SYNC_PULSE
)
632 reg
|= DSIM_SYNC_INFORM
;
633 if (dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_BURST
)
634 reg
|= DSIM_BURST_MODE
;
635 if (dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_AUTO_VERT
)
636 reg
|= DSIM_AUTO_MODE
;
637 if (dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_HSE
)
638 reg
|= DSIM_HSE_MODE
;
639 if (!(dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_HFP
))
640 reg
|= DSIM_HFP_MODE
;
641 if (!(dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_HBP
))
642 reg
|= DSIM_HBP_MODE
;
643 if (!(dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO_HSA
))
644 reg
|= DSIM_HSA_MODE
;
647 if (!(dsi
->mode_flags
& MIPI_DSI_MODE_EOT_PACKET
))
648 reg
|= DSIM_EOT_DISABLE
;
650 switch (dsi
->format
) {
651 case MIPI_DSI_FMT_RGB888
:
652 reg
|= DSIM_MAIN_PIX_FORMAT_RGB888
;
654 case MIPI_DSI_FMT_RGB666
:
655 reg
|= DSIM_MAIN_PIX_FORMAT_RGB666
;
657 case MIPI_DSI_FMT_RGB666_PACKED
:
658 reg
|= DSIM_MAIN_PIX_FORMAT_RGB666_P
;
660 case MIPI_DSI_FMT_RGB565
:
661 reg
|= DSIM_MAIN_PIX_FORMAT_RGB565
;
664 dev_err(dsi
->dev
, "invalid pixel format\n");
668 reg
|= DSIM_NUM_OF_DATA_LANE(dsi
->lanes
- 1);
670 writel(reg
, dsi
->reg_base
+ DSIM_CONFIG_REG
);
672 reg
|= DSIM_LANE_EN_CLK
;
673 writel(reg
, dsi
->reg_base
+ DSIM_CONFIG_REG
);
675 lanes_mask
= BIT(dsi
->lanes
) - 1;
676 reg
|= DSIM_LANE_EN(lanes_mask
);
677 writel(reg
, dsi
->reg_base
+ DSIM_CONFIG_REG
);
680 * Use non-continuous clock mode if the periparal wants and
681 * host controller supports
683 * In non-continous clock mode, host controller will turn off
684 * the HS clock between high-speed transmissions to reduce
687 if (driver_data
->has_clklane_stop
&&
688 dsi
->mode_flags
& MIPI_DSI_CLOCK_NON_CONTINUOUS
) {
689 reg
|= DSIM_CLKLANE_STOP
;
690 writel(reg
, dsi
->reg_base
+ DSIM_CONFIG_REG
);
693 /* Check clock and data lane state are stop state */
696 if (timeout
-- == 0) {
697 dev_err(dsi
->dev
, "waiting for bus lanes timed out\n");
701 reg
= readl(dsi
->reg_base
+ DSIM_STATUS_REG
);
702 if ((reg
& DSIM_STOP_STATE_DAT(lanes_mask
))
703 != DSIM_STOP_STATE_DAT(lanes_mask
))
705 } while (!(reg
& (DSIM_STOP_STATE_CLK
| DSIM_TX_READY_HS_CLK
)));
707 reg
= readl(dsi
->reg_base
+ DSIM_ESCMODE_REG
);
708 reg
&= ~DSIM_STOP_STATE_CNT_MASK
;
709 reg
|= DSIM_STOP_STATE_CNT(0xf);
710 writel(reg
, dsi
->reg_base
+ DSIM_ESCMODE_REG
);
712 reg
= DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
713 writel(reg
, dsi
->reg_base
+ DSIM_TIMEOUT_REG
);
718 static void exynos_dsi_set_display_mode(struct exynos_dsi
*dsi
)
720 struct videomode
*vm
= &dsi
->vm
;
723 if (dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO
) {
724 reg
= DSIM_CMD_ALLOW(0xf)
725 | DSIM_STABLE_VFP(vm
->vfront_porch
)
726 | DSIM_MAIN_VBP(vm
->vback_porch
);
727 writel(reg
, dsi
->reg_base
+ DSIM_MVPORCH_REG
);
729 reg
= DSIM_MAIN_HFP(vm
->hfront_porch
)
730 | DSIM_MAIN_HBP(vm
->hback_porch
);
731 writel(reg
, dsi
->reg_base
+ DSIM_MHPORCH_REG
);
733 reg
= DSIM_MAIN_VSA(vm
->vsync_len
)
734 | DSIM_MAIN_HSA(vm
->hsync_len
);
735 writel(reg
, dsi
->reg_base
+ DSIM_MSYNC_REG
);
738 reg
= DSIM_MAIN_HRESOL(vm
->hactive
) | DSIM_MAIN_VRESOL(vm
->vactive
);
739 writel(reg
, dsi
->reg_base
+ DSIM_MDRESOL_REG
);
741 dev_dbg(dsi
->dev
, "LCD size = %dx%d\n", vm
->hactive
, vm
->vactive
);
744 static void exynos_dsi_set_display_enable(struct exynos_dsi
*dsi
, bool enable
)
748 reg
= readl(dsi
->reg_base
+ DSIM_MDRESOL_REG
);
750 reg
|= DSIM_MAIN_STAND_BY
;
752 reg
&= ~DSIM_MAIN_STAND_BY
;
753 writel(reg
, dsi
->reg_base
+ DSIM_MDRESOL_REG
);
756 static int exynos_dsi_wait_for_hdr_fifo(struct exynos_dsi
*dsi
)
761 u32 reg
= readl(dsi
->reg_base
+ DSIM_FIFOCTRL_REG
);
763 if (!(reg
& DSIM_SFR_HEADER_FULL
))
767 usleep_range(950, 1050);
773 static void exynos_dsi_set_cmd_lpm(struct exynos_dsi
*dsi
, bool lpm
)
775 u32 v
= readl(dsi
->reg_base
+ DSIM_ESCMODE_REG
);
778 v
|= DSIM_CMD_LPDT_LP
;
780 v
&= ~DSIM_CMD_LPDT_LP
;
782 writel(v
, dsi
->reg_base
+ DSIM_ESCMODE_REG
);
785 static void exynos_dsi_force_bta(struct exynos_dsi
*dsi
)
787 u32 v
= readl(dsi
->reg_base
+ DSIM_ESCMODE_REG
);
790 writel(v
, dsi
->reg_base
+ DSIM_ESCMODE_REG
);
793 static void exynos_dsi_send_to_fifo(struct exynos_dsi
*dsi
,
794 struct exynos_dsi_transfer
*xfer
)
796 struct device
*dev
= dsi
->dev
;
797 const u8
*payload
= xfer
->tx_payload
+ xfer
->tx_done
;
798 u16 length
= xfer
->tx_len
- xfer
->tx_done
;
799 bool first
= !xfer
->tx_done
;
802 dev_dbg(dev
, "< xfer %p: tx len %u, done %u, rx len %u, done %u\n",
803 xfer
, xfer
->tx_len
, xfer
->tx_done
, xfer
->rx_len
, xfer
->rx_done
);
805 if (length
> DSI_TX_FIFO_SIZE
)
806 length
= DSI_TX_FIFO_SIZE
;
808 xfer
->tx_done
+= length
;
811 while (length
>= 4) {
812 reg
= (payload
[3] << 24) | (payload
[2] << 16)
813 | (payload
[1] << 8) | payload
[0];
814 writel(reg
, dsi
->reg_base
+ DSIM_PAYLOAD_REG
);
822 reg
|= payload
[2] << 16;
825 reg
|= payload
[1] << 8;
829 writel(reg
, dsi
->reg_base
+ DSIM_PAYLOAD_REG
);
836 /* Send packet header */
840 reg
= (xfer
->data
[1] << 16) | (xfer
->data
[0] << 8) | xfer
->data_id
;
841 if (exynos_dsi_wait_for_hdr_fifo(dsi
)) {
842 dev_err(dev
, "waiting for header FIFO timed out\n");
846 if (NEQV(xfer
->flags
& MIPI_DSI_MSG_USE_LPM
,
847 dsi
->state
& DSIM_STATE_CMD_LPM
)) {
848 exynos_dsi_set_cmd_lpm(dsi
, xfer
->flags
& MIPI_DSI_MSG_USE_LPM
);
849 dsi
->state
^= DSIM_STATE_CMD_LPM
;
852 writel(reg
, dsi
->reg_base
+ DSIM_PKTHDR_REG
);
854 if (xfer
->flags
& MIPI_DSI_MSG_REQ_ACK
)
855 exynos_dsi_force_bta(dsi
);
858 static void exynos_dsi_read_from_fifo(struct exynos_dsi
*dsi
,
859 struct exynos_dsi_transfer
*xfer
)
861 u8
*payload
= xfer
->rx_payload
+ xfer
->rx_done
;
862 bool first
= !xfer
->rx_done
;
863 struct device
*dev
= dsi
->dev
;
868 reg
= readl(dsi
->reg_base
+ DSIM_RXFIFO_REG
);
870 switch (reg
& 0x3f) {
871 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE
:
872 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE
:
873 if (xfer
->rx_len
>= 2) {
874 payload
[1] = reg
>> 16;
878 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE
:
879 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE
:
880 payload
[0] = reg
>> 8;
882 xfer
->rx_len
= xfer
->rx_done
;
885 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT
:
886 dev_err(dev
, "DSI Error Report: 0x%04x\n",
887 (reg
>> 8) & 0xffff);
892 length
= (reg
>> 8) & 0xffff;
893 if (length
> xfer
->rx_len
) {
895 "response too long (%u > %u bytes), stripping\n",
896 xfer
->rx_len
, length
);
897 length
= xfer
->rx_len
;
898 } else if (length
< xfer
->rx_len
)
899 xfer
->rx_len
= length
;
902 length
= xfer
->rx_len
- xfer
->rx_done
;
903 xfer
->rx_done
+= length
;
905 /* Receive payload */
906 while (length
>= 4) {
907 reg
= readl(dsi
->reg_base
+ DSIM_RXFIFO_REG
);
908 payload
[0] = (reg
>> 0) & 0xff;
909 payload
[1] = (reg
>> 8) & 0xff;
910 payload
[2] = (reg
>> 16) & 0xff;
911 payload
[3] = (reg
>> 24) & 0xff;
917 reg
= readl(dsi
->reg_base
+ DSIM_RXFIFO_REG
);
920 payload
[2] = (reg
>> 16) & 0xff;
923 payload
[1] = (reg
>> 8) & 0xff;
926 payload
[0] = reg
& 0xff;
930 if (xfer
->rx_done
== xfer
->rx_len
)
934 length
= DSI_RX_FIFO_SIZE
/ 4;
936 reg
= readl(dsi
->reg_base
+ DSIM_RXFIFO_REG
);
937 if (reg
== DSI_RX_FIFO_EMPTY
)
942 static void exynos_dsi_transfer_start(struct exynos_dsi
*dsi
)
945 struct exynos_dsi_transfer
*xfer
;
949 spin_lock_irqsave(&dsi
->transfer_lock
, flags
);
951 if (list_empty(&dsi
->transfer_list
)) {
952 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
956 xfer
= list_first_entry(&dsi
->transfer_list
,
957 struct exynos_dsi_transfer
, list
);
959 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
961 if (xfer
->tx_len
&& xfer
->tx_done
== xfer
->tx_len
)
965 exynos_dsi_send_to_fifo(dsi
, xfer
);
967 if (xfer
->tx_len
|| xfer
->rx_len
)
971 complete(&xfer
->completed
);
973 spin_lock_irqsave(&dsi
->transfer_lock
, flags
);
975 list_del_init(&xfer
->list
);
976 start
= !list_empty(&dsi
->transfer_list
);
978 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
984 static bool exynos_dsi_transfer_finish(struct exynos_dsi
*dsi
)
986 struct exynos_dsi_transfer
*xfer
;
990 spin_lock_irqsave(&dsi
->transfer_lock
, flags
);
992 if (list_empty(&dsi
->transfer_list
)) {
993 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
997 xfer
= list_first_entry(&dsi
->transfer_list
,
998 struct exynos_dsi_transfer
, list
);
1000 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
1003 "> xfer %p, tx_len %u, tx_done %u, rx_len %u, rx_done %u\n",
1004 xfer
, xfer
->tx_len
, xfer
->tx_done
, xfer
->rx_len
, xfer
->rx_done
);
1006 if (xfer
->tx_done
!= xfer
->tx_len
)
1009 if (xfer
->rx_done
!= xfer
->rx_len
)
1010 exynos_dsi_read_from_fifo(dsi
, xfer
);
1012 if (xfer
->rx_done
!= xfer
->rx_len
)
1015 spin_lock_irqsave(&dsi
->transfer_lock
, flags
);
1017 list_del_init(&xfer
->list
);
1018 start
= !list_empty(&dsi
->transfer_list
);
1020 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
1024 complete(&xfer
->completed
);
1029 static void exynos_dsi_remove_transfer(struct exynos_dsi
*dsi
,
1030 struct exynos_dsi_transfer
*xfer
)
1032 unsigned long flags
;
1035 spin_lock_irqsave(&dsi
->transfer_lock
, flags
);
1037 if (!list_empty(&dsi
->transfer_list
) &&
1038 xfer
== list_first_entry(&dsi
->transfer_list
,
1039 struct exynos_dsi_transfer
, list
)) {
1040 list_del_init(&xfer
->list
);
1041 start
= !list_empty(&dsi
->transfer_list
);
1042 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
1044 exynos_dsi_transfer_start(dsi
);
1048 list_del_init(&xfer
->list
);
1050 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
1053 static int exynos_dsi_transfer(struct exynos_dsi
*dsi
,
1054 struct exynos_dsi_transfer
*xfer
)
1056 unsigned long flags
;
1061 xfer
->result
= -ETIMEDOUT
;
1062 init_completion(&xfer
->completed
);
1064 spin_lock_irqsave(&dsi
->transfer_lock
, flags
);
1066 stopped
= list_empty(&dsi
->transfer_list
);
1067 list_add_tail(&xfer
->list
, &dsi
->transfer_list
);
1069 spin_unlock_irqrestore(&dsi
->transfer_lock
, flags
);
1072 exynos_dsi_transfer_start(dsi
);
1074 wait_for_completion_timeout(&xfer
->completed
,
1075 msecs_to_jiffies(DSI_XFER_TIMEOUT_MS
));
1076 if (xfer
->result
== -ETIMEDOUT
) {
1077 exynos_dsi_remove_transfer(dsi
, xfer
);
1078 dev_err(dsi
->dev
, "xfer timed out: %*ph %*ph\n", 2, xfer
->data
,
1079 xfer
->tx_len
, xfer
->tx_payload
);
1083 /* Also covers hardware timeout condition */
1084 return xfer
->result
;
1087 static irqreturn_t
exynos_dsi_irq(int irq
, void *dev_id
)
1089 struct exynos_dsi
*dsi
= dev_id
;
1092 status
= readl(dsi
->reg_base
+ DSIM_INTSRC_REG
);
1094 static unsigned long int j
;
1095 if (printk_timed_ratelimit(&j
, 500))
1096 dev_warn(dsi
->dev
, "spurious interrupt\n");
1099 writel(status
, dsi
->reg_base
+ DSIM_INTSRC_REG
);
1101 if (status
& DSIM_INT_SW_RST_RELEASE
) {
1102 u32 mask
= ~(DSIM_INT_RX_DONE
| DSIM_INT_SFR_FIFO_EMPTY
);
1103 writel(mask
, dsi
->reg_base
+ DSIM_INTMSK_REG
);
1104 complete(&dsi
->completed
);
1108 if (!(status
& (DSIM_INT_RX_DONE
| DSIM_INT_SFR_FIFO_EMPTY
)))
1111 if (exynos_dsi_transfer_finish(dsi
))
1112 exynos_dsi_transfer_start(dsi
);
1117 static irqreturn_t
exynos_dsi_te_irq_handler(int irq
, void *dev_id
)
1119 struct exynos_dsi
*dsi
= (struct exynos_dsi
*)dev_id
;
1120 struct drm_encoder
*encoder
= dsi
->display
.encoder
;
1122 if (dsi
->state
& DSIM_STATE_ENABLED
)
1123 exynos_drm_crtc_te_handler(encoder
->crtc
);
1128 static void exynos_dsi_enable_irq(struct exynos_dsi
*dsi
)
1130 enable_irq(dsi
->irq
);
1132 if (gpio_is_valid(dsi
->te_gpio
))
1133 enable_irq(gpio_to_irq(dsi
->te_gpio
));
1136 static void exynos_dsi_disable_irq(struct exynos_dsi
*dsi
)
1138 if (gpio_is_valid(dsi
->te_gpio
))
1139 disable_irq(gpio_to_irq(dsi
->te_gpio
));
1141 disable_irq(dsi
->irq
);
1144 static int exynos_dsi_init(struct exynos_dsi
*dsi
)
1146 exynos_dsi_reset(dsi
);
1147 exynos_dsi_enable_irq(dsi
);
1148 exynos_dsi_enable_clock(dsi
);
1149 exynos_dsi_wait_for_reset(dsi
);
1150 exynos_dsi_set_phy_ctrl(dsi
);
1151 exynos_dsi_init_link(dsi
);
1156 static int exynos_dsi_register_te_irq(struct exynos_dsi
*dsi
)
1161 dsi
->te_gpio
= of_get_named_gpio(dsi
->panel_node
, "te-gpios", 0);
1162 if (!gpio_is_valid(dsi
->te_gpio
)) {
1163 dev_err(dsi
->dev
, "no te-gpios specified\n");
1168 ret
= gpio_request_one(dsi
->te_gpio
, GPIOF_IN
, "te_gpio");
1170 dev_err(dsi
->dev
, "gpio request failed with %d\n", ret
);
1174 te_gpio_irq
= gpio_to_irq(dsi
->te_gpio
);
1176 irq_set_status_flags(te_gpio_irq
, IRQ_NOAUTOEN
);
1177 ret
= request_threaded_irq(te_gpio_irq
, exynos_dsi_te_irq_handler
, NULL
,
1178 IRQF_TRIGGER_RISING
, "TE", dsi
);
1180 dev_err(dsi
->dev
, "request interrupt failed with %d\n", ret
);
1181 gpio_free(dsi
->te_gpio
);
1189 static void exynos_dsi_unregister_te_irq(struct exynos_dsi
*dsi
)
1191 if (gpio_is_valid(dsi
->te_gpio
)) {
1192 free_irq(gpio_to_irq(dsi
->te_gpio
), dsi
);
1193 gpio_free(dsi
->te_gpio
);
1194 dsi
->te_gpio
= -ENOENT
;
1198 static int exynos_dsi_host_attach(struct mipi_dsi_host
*host
,
1199 struct mipi_dsi_device
*device
)
1201 struct exynos_dsi
*dsi
= host_to_dsi(host
);
1203 dsi
->lanes
= device
->lanes
;
1204 dsi
->format
= device
->format
;
1205 dsi
->mode_flags
= device
->mode_flags
;
1206 dsi
->panel_node
= device
->dev
.of_node
;
1209 * This is a temporary solution and should be made by more generic way.
1211 * If attached panel device is for command mode one, dsi should register
1212 * TE interrupt handler.
1214 if (!(dsi
->mode_flags
& MIPI_DSI_MODE_VIDEO
)) {
1215 int ret
= exynos_dsi_register_te_irq(dsi
);
1221 if (dsi
->connector
.dev
)
1222 drm_helper_hpd_irq_event(dsi
->connector
.dev
);
1227 static int exynos_dsi_host_detach(struct mipi_dsi_host
*host
,
1228 struct mipi_dsi_device
*device
)
1230 struct exynos_dsi
*dsi
= host_to_dsi(host
);
1232 exynos_dsi_unregister_te_irq(dsi
);
1234 dsi
->panel_node
= NULL
;
1236 if (dsi
->connector
.dev
)
1237 drm_helper_hpd_irq_event(dsi
->connector
.dev
);
1242 /* distinguish between short and long DSI packet types */
1243 static bool exynos_dsi_is_short_dsi_type(u8 type
)
1245 return (type
& 0x0f) <= 8;
1248 static ssize_t
exynos_dsi_host_transfer(struct mipi_dsi_host
*host
,
1249 const struct mipi_dsi_msg
*msg
)
1251 struct exynos_dsi
*dsi
= host_to_dsi(host
);
1252 struct exynos_dsi_transfer xfer
;
1255 if (!(dsi
->state
& DSIM_STATE_INITIALIZED
)) {
1256 ret
= exynos_dsi_init(dsi
);
1259 dsi
->state
|= DSIM_STATE_INITIALIZED
;
1262 if (msg
->tx_len
== 0)
1265 xfer
.data_id
= msg
->type
| (msg
->channel
<< 6);
1267 if (exynos_dsi_is_short_dsi_type(msg
->type
)) {
1268 const char *tx_buf
= msg
->tx_buf
;
1270 if (msg
->tx_len
> 2)
1273 xfer
.data
[0] = tx_buf
[0];
1274 xfer
.data
[1] = (msg
->tx_len
== 2) ? tx_buf
[1] : 0;
1276 xfer
.tx_len
= msg
->tx_len
;
1277 xfer
.data
[0] = msg
->tx_len
& 0xff;
1278 xfer
.data
[1] = msg
->tx_len
>> 8;
1279 xfer
.tx_payload
= msg
->tx_buf
;
1282 xfer
.rx_len
= msg
->rx_len
;
1283 xfer
.rx_payload
= msg
->rx_buf
;
1284 xfer
.flags
= msg
->flags
;
1286 ret
= exynos_dsi_transfer(dsi
, &xfer
);
1287 return (ret
< 0) ? ret
: xfer
.rx_done
;
1290 static const struct mipi_dsi_host_ops exynos_dsi_ops
= {
1291 .attach
= exynos_dsi_host_attach
,
1292 .detach
= exynos_dsi_host_detach
,
1293 .transfer
= exynos_dsi_host_transfer
,
1296 static int exynos_dsi_poweron(struct exynos_dsi
*dsi
)
1300 ret
= regulator_bulk_enable(ARRAY_SIZE(dsi
->supplies
), dsi
->supplies
);
1302 dev_err(dsi
->dev
, "cannot enable regulators %d\n", ret
);
1306 ret
= clk_prepare_enable(dsi
->bus_clk
);
1308 dev_err(dsi
->dev
, "cannot enable bus clock %d\n", ret
);
1312 ret
= clk_prepare_enable(dsi
->pll_clk
);
1314 dev_err(dsi
->dev
, "cannot enable pll clock %d\n", ret
);
1318 ret
= phy_power_on(dsi
->phy
);
1320 dev_err(dsi
->dev
, "cannot enable phy %d\n", ret
);
1327 clk_disable_unprepare(dsi
->pll_clk
);
1329 clk_disable_unprepare(dsi
->bus_clk
);
1331 regulator_bulk_disable(ARRAY_SIZE(dsi
->supplies
), dsi
->supplies
);
1336 static void exynos_dsi_poweroff(struct exynos_dsi
*dsi
)
1340 usleep_range(10000, 20000);
1342 if (dsi
->state
& DSIM_STATE_INITIALIZED
) {
1343 dsi
->state
&= ~DSIM_STATE_INITIALIZED
;
1345 exynos_dsi_disable_clock(dsi
);
1347 exynos_dsi_disable_irq(dsi
);
1350 dsi
->state
&= ~DSIM_STATE_CMD_LPM
;
1352 phy_power_off(dsi
->phy
);
1354 clk_disable_unprepare(dsi
->pll_clk
);
1355 clk_disable_unprepare(dsi
->bus_clk
);
1357 ret
= regulator_bulk_disable(ARRAY_SIZE(dsi
->supplies
), dsi
->supplies
);
1359 dev_err(dsi
->dev
, "cannot disable regulators %d\n", ret
);
1362 static int exynos_dsi_enable(struct exynos_dsi
*dsi
)
1366 if (dsi
->state
& DSIM_STATE_ENABLED
)
1369 ret
= exynos_dsi_poweron(dsi
);
1373 ret
= drm_panel_prepare(dsi
->panel
);
1375 exynos_dsi_poweroff(dsi
);
1379 exynos_dsi_set_display_mode(dsi
);
1380 exynos_dsi_set_display_enable(dsi
, true);
1382 dsi
->state
|= DSIM_STATE_ENABLED
;
1384 ret
= drm_panel_enable(dsi
->panel
);
1386 dsi
->state
&= ~DSIM_STATE_ENABLED
;
1387 exynos_dsi_set_display_enable(dsi
, false);
1388 drm_panel_unprepare(dsi
->panel
);
1389 exynos_dsi_poweroff(dsi
);
1396 static void exynos_dsi_disable(struct exynos_dsi
*dsi
)
1398 if (!(dsi
->state
& DSIM_STATE_ENABLED
))
1401 drm_panel_disable(dsi
->panel
);
1402 exynos_dsi_set_display_enable(dsi
, false);
1403 drm_panel_unprepare(dsi
->panel
);
1404 exynos_dsi_poweroff(dsi
);
1406 dsi
->state
&= ~DSIM_STATE_ENABLED
;
1409 static void exynos_dsi_dpms(struct exynos_drm_display
*display
, int mode
)
1411 struct exynos_dsi
*dsi
= display_to_dsi(display
);
1415 case DRM_MODE_DPMS_ON
:
1416 exynos_dsi_enable(dsi
);
1418 case DRM_MODE_DPMS_STANDBY
:
1419 case DRM_MODE_DPMS_SUSPEND
:
1420 case DRM_MODE_DPMS_OFF
:
1421 exynos_dsi_disable(dsi
);
1429 static enum drm_connector_status
1430 exynos_dsi_detect(struct drm_connector
*connector
, bool force
)
1432 struct exynos_dsi
*dsi
= connector_to_dsi(connector
);
1435 dsi
->panel
= of_drm_find_panel(dsi
->panel_node
);
1437 drm_panel_attach(dsi
->panel
, &dsi
->connector
);
1438 } else if (!dsi
->panel_node
) {
1439 struct exynos_drm_display
*display
;
1441 display
= platform_get_drvdata(to_platform_device(dsi
->dev
));
1442 exynos_dsi_dpms(display
, DRM_MODE_DPMS_OFF
);
1443 drm_panel_detach(dsi
->panel
);
1448 return connector_status_connected
;
1450 return connector_status_disconnected
;
1453 static void exynos_dsi_connector_destroy(struct drm_connector
*connector
)
1455 drm_connector_unregister(connector
);
1456 drm_connector_cleanup(connector
);
1457 connector
->dev
= NULL
;
1460 static struct drm_connector_funcs exynos_dsi_connector_funcs
= {
1461 .dpms
= drm_helper_connector_dpms
,
1462 .detect
= exynos_dsi_detect
,
1463 .fill_modes
= drm_helper_probe_single_connector_modes
,
1464 .destroy
= exynos_dsi_connector_destroy
,
1465 .reset
= drm_atomic_helper_connector_reset
,
1466 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
1467 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
1470 static int exynos_dsi_get_modes(struct drm_connector
*connector
)
1472 struct exynos_dsi
*dsi
= connector_to_dsi(connector
);
1475 return dsi
->panel
->funcs
->get_modes(dsi
->panel
);
1480 static struct drm_encoder
*
1481 exynos_dsi_best_encoder(struct drm_connector
*connector
)
1483 struct exynos_dsi
*dsi
= connector_to_dsi(connector
);
1485 return dsi
->display
.encoder
;
1488 static struct drm_connector_helper_funcs exynos_dsi_connector_helper_funcs
= {
1489 .get_modes
= exynos_dsi_get_modes
,
1490 .best_encoder
= exynos_dsi_best_encoder
,
1493 static int exynos_dsi_create_connector(struct exynos_drm_display
*display
,
1494 struct drm_encoder
*encoder
)
1496 struct exynos_dsi
*dsi
= display_to_dsi(display
);
1497 struct drm_connector
*connector
= &dsi
->connector
;
1500 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
1502 ret
= drm_connector_init(encoder
->dev
, connector
,
1503 &exynos_dsi_connector_funcs
,
1504 DRM_MODE_CONNECTOR_DSI
);
1506 DRM_ERROR("Failed to initialize connector with drm\n");
1510 drm_connector_helper_add(connector
, &exynos_dsi_connector_helper_funcs
);
1511 drm_connector_register(connector
);
1512 drm_mode_connector_attach_encoder(connector
, encoder
);
1517 static void exynos_dsi_mode_set(struct exynos_drm_display
*display
,
1518 struct drm_display_mode
*mode
)
1520 struct exynos_dsi
*dsi
= display_to_dsi(display
);
1521 struct videomode
*vm
= &dsi
->vm
;
1523 vm
->hactive
= mode
->hdisplay
;
1524 vm
->vactive
= mode
->vdisplay
;
1525 vm
->vfront_porch
= mode
->vsync_start
- mode
->vdisplay
;
1526 vm
->vback_porch
= mode
->vtotal
- mode
->vsync_end
;
1527 vm
->vsync_len
= mode
->vsync_end
- mode
->vsync_start
;
1528 vm
->hfront_porch
= mode
->hsync_start
- mode
->hdisplay
;
1529 vm
->hback_porch
= mode
->htotal
- mode
->hsync_end
;
1530 vm
->hsync_len
= mode
->hsync_end
- mode
->hsync_start
;
1533 static struct exynos_drm_display_ops exynos_dsi_display_ops
= {
1534 .create_connector
= exynos_dsi_create_connector
,
1535 .mode_set
= exynos_dsi_mode_set
,
1536 .dpms
= exynos_dsi_dpms
1539 MODULE_DEVICE_TABLE(of
, exynos_dsi_of_match
);
1541 /* of_* functions will be removed after merge of of_graph patches */
1542 static struct device_node
*
1543 of_get_child_by_name_reg(struct device_node
*parent
, const char *name
, u32 reg
)
1545 struct device_node
*np
;
1547 for_each_child_of_node(parent
, np
) {
1550 if (!np
->name
|| of_node_cmp(np
->name
, name
))
1553 if (of_property_read_u32(np
, "reg", &r
) < 0)
1563 static struct device_node
*of_graph_get_port_by_reg(struct device_node
*parent
,
1566 struct device_node
*ports
, *port
;
1568 ports
= of_get_child_by_name(parent
, "ports");
1572 port
= of_get_child_by_name_reg(parent
, "port", reg
);
1579 static struct device_node
*
1580 of_graph_get_endpoint_by_reg(struct device_node
*port
, u32 reg
)
1582 return of_get_child_by_name_reg(port
, "endpoint", reg
);
1585 static int exynos_dsi_of_read_u32(const struct device_node
*np
,
1586 const char *propname
, u32
*out_value
)
1588 int ret
= of_property_read_u32(np
, propname
, out_value
);
1591 pr_err("%s: failed to get '%s' property\n", np
->full_name
,
1602 static int exynos_dsi_parse_dt(struct exynos_dsi
*dsi
)
1604 struct device
*dev
= dsi
->dev
;
1605 struct device_node
*node
= dev
->of_node
;
1606 struct device_node
*port
, *ep
;
1609 ret
= exynos_dsi_of_read_u32(node
, "samsung,pll-clock-frequency",
1610 &dsi
->pll_clk_rate
);
1614 port
= of_graph_get_port_by_reg(node
, DSI_PORT_OUT
);
1616 dev_err(dev
, "no output port specified\n");
1620 ep
= of_graph_get_endpoint_by_reg(port
, 0);
1623 dev_err(dev
, "no endpoint specified in output port\n");
1627 ret
= exynos_dsi_of_read_u32(ep
, "samsung,burst-clock-frequency",
1628 &dsi
->burst_clk_rate
);
1632 ret
= exynos_dsi_of_read_u32(ep
, "samsung,esc-clock-frequency",
1633 &dsi
->esc_clk_rate
);
1641 static int exynos_dsi_bind(struct device
*dev
, struct device
*master
,
1644 struct exynos_drm_display
*display
= dev_get_drvdata(dev
);
1645 struct exynos_dsi
*dsi
= display_to_dsi(display
);
1646 struct drm_device
*drm_dev
= data
;
1649 ret
= exynos_drm_create_enc_conn(drm_dev
, display
);
1651 DRM_ERROR("Encoder create [%d] failed with %d\n",
1652 display
->type
, ret
);
1656 return mipi_dsi_host_register(&dsi
->dsi_host
);
1659 static void exynos_dsi_unbind(struct device
*dev
, struct device
*master
,
1662 struct exynos_drm_display
*display
= dev_get_drvdata(dev
);
1663 struct exynos_dsi
*dsi
= display_to_dsi(display
);
1665 exynos_dsi_dpms(display
, DRM_MODE_DPMS_OFF
);
1667 mipi_dsi_host_unregister(&dsi
->dsi_host
);
1670 static const struct component_ops exynos_dsi_component_ops
= {
1671 .bind
= exynos_dsi_bind
,
1672 .unbind
= exynos_dsi_unbind
,
1675 static int exynos_dsi_probe(struct platform_device
*pdev
)
1677 struct device
*dev
= &pdev
->dev
;
1678 struct resource
*res
;
1679 struct exynos_dsi
*dsi
;
1682 dsi
= devm_kzalloc(dev
, sizeof(*dsi
), GFP_KERNEL
);
1686 dsi
->display
.type
= EXYNOS_DISPLAY_TYPE_LCD
;
1687 dsi
->display
.ops
= &exynos_dsi_display_ops
;
1689 ret
= exynos_drm_component_add(dev
, EXYNOS_DEVICE_TYPE_CONNECTOR
,
1694 /* To be checked as invalid one */
1695 dsi
->te_gpio
= -ENOENT
;
1697 init_completion(&dsi
->completed
);
1698 spin_lock_init(&dsi
->transfer_lock
);
1699 INIT_LIST_HEAD(&dsi
->transfer_list
);
1701 dsi
->dsi_host
.ops
= &exynos_dsi_ops
;
1702 dsi
->dsi_host
.dev
= dev
;
1705 dsi
->driver_data
= exynos_dsi_get_driver_data(pdev
);
1707 ret
= exynos_dsi_parse_dt(dsi
);
1709 goto err_del_component
;
1711 dsi
->supplies
[0].supply
= "vddcore";
1712 dsi
->supplies
[1].supply
= "vddio";
1713 ret
= devm_regulator_bulk_get(dev
, ARRAY_SIZE(dsi
->supplies
),
1716 dev_info(dev
, "failed to get regulators: %d\n", ret
);
1717 return -EPROBE_DEFER
;
1720 dsi
->pll_clk
= devm_clk_get(dev
, "pll_clk");
1721 if (IS_ERR(dsi
->pll_clk
)) {
1722 dev_info(dev
, "failed to get dsi pll input clock\n");
1723 ret
= PTR_ERR(dsi
->pll_clk
);
1724 goto err_del_component
;
1727 dsi
->bus_clk
= devm_clk_get(dev
, "bus_clk");
1728 if (IS_ERR(dsi
->bus_clk
)) {
1729 dev_info(dev
, "failed to get dsi bus clock\n");
1730 ret
= PTR_ERR(dsi
->bus_clk
);
1731 goto err_del_component
;
1734 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1735 dsi
->reg_base
= devm_ioremap_resource(dev
, res
);
1736 if (IS_ERR(dsi
->reg_base
)) {
1737 dev_err(dev
, "failed to remap io region\n");
1738 ret
= PTR_ERR(dsi
->reg_base
);
1739 goto err_del_component
;
1742 dsi
->phy
= devm_phy_get(dev
, "dsim");
1743 if (IS_ERR(dsi
->phy
)) {
1744 dev_info(dev
, "failed to get dsim phy\n");
1745 ret
= PTR_ERR(dsi
->phy
);
1746 goto err_del_component
;
1749 dsi
->irq
= platform_get_irq(pdev
, 0);
1751 dev_err(dev
, "failed to request dsi irq resource\n");
1753 goto err_del_component
;
1756 irq_set_status_flags(dsi
->irq
, IRQ_NOAUTOEN
);
1757 ret
= devm_request_threaded_irq(dev
, dsi
->irq
, NULL
,
1758 exynos_dsi_irq
, IRQF_ONESHOT
,
1759 dev_name(dev
), dsi
);
1761 dev_err(dev
, "failed to request dsi irq\n");
1762 goto err_del_component
;
1765 platform_set_drvdata(pdev
, &dsi
->display
);
1767 ret
= component_add(dev
, &exynos_dsi_component_ops
);
1769 goto err_del_component
;
1774 exynos_drm_component_del(dev
, EXYNOS_DEVICE_TYPE_CONNECTOR
);
1778 static int exynos_dsi_remove(struct platform_device
*pdev
)
1780 component_del(&pdev
->dev
, &exynos_dsi_component_ops
);
1781 exynos_drm_component_del(&pdev
->dev
, EXYNOS_DEVICE_TYPE_CONNECTOR
);
1786 struct platform_driver dsi_driver
= {
1787 .probe
= exynos_dsi_probe
,
1788 .remove
= exynos_dsi_remove
,
1790 .name
= "exynos-dsi",
1791 .owner
= THIS_MODULE
,
1792 .of_match_table
= exynos_dsi_of_match
,
1796 MODULE_AUTHOR("Tomasz Figa <t.figa@samsung.com>");
1797 MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
1798 MODULE_DESCRIPTION("Samsung SoC MIPI DSI Master");
1799 MODULE_LICENSE("GPL v2");