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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2014 MediaTek Inc.
4 * Author: Jie Qiu <jie.qiu@mediatek.com>
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/interrupt.h>
10#include <linux/kernel.h>
11#include <linux/media-bus-format.h>
12#include <linux/of.h>
13#include <linux/of_graph.h>
14#include <linux/pinctrl/consumer.h>
15#include <linux/platform_device.h>
16#include <linux/soc/mediatek/mtk-mmsys.h>
17#include <linux/types.h>
18
19#include <video/videomode.h>
20
21#include <drm/drm_atomic_helper.h>
22#include <drm/drm_bridge.h>
23#include <drm/drm_bridge_connector.h>
24#include <drm/drm_crtc.h>
25#include <drm/drm_edid.h>
26#include <drm/drm_of.h>
27#include <drm/drm_simple_kms_helper.h>
28
29#include "mtk_ddp_comp.h"
30#include "mtk_disp_drv.h"
31#include "mtk_dpi_regs.h"
32#include "mtk_drm_drv.h"
33
34enum mtk_dpi_out_bit_num {
35 MTK_DPI_OUT_BIT_NUM_8BITS,
36 MTK_DPI_OUT_BIT_NUM_10BITS,
37 MTK_DPI_OUT_BIT_NUM_12BITS,
38 MTK_DPI_OUT_BIT_NUM_16BITS
39};
40
41enum mtk_dpi_out_yc_map {
42 MTK_DPI_OUT_YC_MAP_RGB,
43 MTK_DPI_OUT_YC_MAP_CYCY,
44 MTK_DPI_OUT_YC_MAP_YCYC,
45 MTK_DPI_OUT_YC_MAP_CY,
46 MTK_DPI_OUT_YC_MAP_YC
47};
48
49enum mtk_dpi_out_channel_swap {
50 MTK_DPI_OUT_CHANNEL_SWAP_RGB,
51 MTK_DPI_OUT_CHANNEL_SWAP_GBR,
52 MTK_DPI_OUT_CHANNEL_SWAP_BRG,
53 MTK_DPI_OUT_CHANNEL_SWAP_RBG,
54 MTK_DPI_OUT_CHANNEL_SWAP_GRB,
55 MTK_DPI_OUT_CHANNEL_SWAP_BGR
56};
57
58enum mtk_dpi_out_color_format {
59 MTK_DPI_COLOR_FORMAT_RGB,
60 MTK_DPI_COLOR_FORMAT_YCBCR_422
61};
62
63struct mtk_dpi {
64 struct drm_encoder encoder;
65 struct drm_bridge bridge;
66 struct drm_bridge *next_bridge;
67 struct drm_connector *connector;
68 void __iomem *regs;
69 struct device *dev;
70 struct device *mmsys_dev;
71 struct clk *engine_clk;
72 struct clk *pixel_clk;
73 struct clk *tvd_clk;
74 int irq;
75 struct drm_display_mode mode;
76 const struct mtk_dpi_conf *conf;
77 enum mtk_dpi_out_color_format color_format;
78 enum mtk_dpi_out_yc_map yc_map;
79 enum mtk_dpi_out_bit_num bit_num;
80 enum mtk_dpi_out_channel_swap channel_swap;
81 struct pinctrl *pinctrl;
82 struct pinctrl_state *pins_gpio;
83 struct pinctrl_state *pins_dpi;
84 u32 output_fmt;
85 int refcount;
86};
87
88static inline struct mtk_dpi *bridge_to_dpi(struct drm_bridge *b)
89{
90 return container_of(b, struct mtk_dpi, bridge);
91}
92
93enum mtk_dpi_polarity {
94 MTK_DPI_POLARITY_RISING,
95 MTK_DPI_POLARITY_FALLING,
96};
97
98struct mtk_dpi_polarities {
99 enum mtk_dpi_polarity de_pol;
100 enum mtk_dpi_polarity ck_pol;
101 enum mtk_dpi_polarity hsync_pol;
102 enum mtk_dpi_polarity vsync_pol;
103};
104
105struct mtk_dpi_sync_param {
106 u32 sync_width;
107 u32 front_porch;
108 u32 back_porch;
109 bool shift_half_line;
110};
111
112struct mtk_dpi_yc_limit {
113 u16 y_top;
114 u16 y_bottom;
115 u16 c_top;
116 u16 c_bottom;
117};
118
119/**
120 * struct mtk_dpi_conf - Configuration of mediatek dpi.
121 * @cal_factor: Callback function to calculate factor value.
122 * @reg_h_fre_con: Register address of frequency control.
123 * @max_clock_khz: Max clock frequency supported for this SoCs in khz units.
124 * @edge_sel_en: Enable of edge selection.
125 * @output_fmts: Array of supported output formats.
126 * @num_output_fmts: Quantity of supported output formats.
127 * @is_ck_de_pol: Support CK/DE polarity.
128 * @swap_input_support: Support input swap function.
129 * @support_direct_pin: IP supports direct connection to dpi panels.
130 * @input_2pixel: Input pixel of dp_intf is 2 pixel per round, so enable this
131 * config to enable this feature.
132 * @dimension_mask: Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH
133 * (no shift).
134 * @hvsize_mask: Mask of HSIZE and VSIZE mask (no shift).
135 * @channel_swap_shift: Shift value of channel swap.
136 * @yuv422_en_bit: Enable bit of yuv422.
137 * @csc_enable_bit: Enable bit of CSC.
138 * @pixels_per_iter: Quantity of transferred pixels per iteration.
139 * @edge_cfg_in_mmsys: If the edge configuration for DPI's output needs to be set in MMSYS.
140 */
141struct mtk_dpi_conf {
142 unsigned int (*cal_factor)(int clock);
143 u32 reg_h_fre_con;
144 u32 max_clock_khz;
145 bool edge_sel_en;
146 const u32 *output_fmts;
147 u32 num_output_fmts;
148 bool is_ck_de_pol;
149 bool swap_input_support;
150 bool support_direct_pin;
151 bool input_2pixel;
152 u32 dimension_mask;
153 u32 hvsize_mask;
154 u32 channel_swap_shift;
155 u32 yuv422_en_bit;
156 u32 csc_enable_bit;
157 u32 pixels_per_iter;
158 bool edge_cfg_in_mmsys;
159};
160
161static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
162{
163 u32 tmp = readl(dpi->regs + offset) & ~mask;
164
165 tmp |= (val & mask);
166 writel(tmp, dpi->regs + offset);
167}
168
169static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset)
170{
171 mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST);
172}
173
174static void mtk_dpi_enable(struct mtk_dpi *dpi)
175{
176 mtk_dpi_mask(dpi, DPI_EN, EN, EN);
177}
178
179static void mtk_dpi_disable(struct mtk_dpi *dpi)
180{
181 mtk_dpi_mask(dpi, DPI_EN, 0, EN);
182}
183
184static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
185 struct mtk_dpi_sync_param *sync)
186{
187 mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH, sync->sync_width << HPW,
188 dpi->conf->dimension_mask << HPW);
189 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->back_porch << HBP,
190 dpi->conf->dimension_mask << HBP);
191 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
192 dpi->conf->dimension_mask << HFP);
193}
194
195static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
196 struct mtk_dpi_sync_param *sync,
197 u32 width_addr, u32 porch_addr)
198{
199 mtk_dpi_mask(dpi, width_addr,
200 sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
201 VSYNC_HALF_LINE_MASK);
202 mtk_dpi_mask(dpi, width_addr,
203 sync->sync_width << VSYNC_WIDTH_SHIFT,
204 dpi->conf->dimension_mask << VSYNC_WIDTH_SHIFT);
205 mtk_dpi_mask(dpi, porch_addr,
206 sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
207 dpi->conf->dimension_mask << VSYNC_BACK_PORCH_SHIFT);
208 mtk_dpi_mask(dpi, porch_addr,
209 sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
210 dpi->conf->dimension_mask << VSYNC_FRONT_PORCH_SHIFT);
211}
212
213static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
214 struct mtk_dpi_sync_param *sync)
215{
216 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH);
217}
218
219static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi,
220 struct mtk_dpi_sync_param *sync)
221{
222 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN,
223 DPI_TGEN_VPORCH_LEVEN);
224}
225
226static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi,
227 struct mtk_dpi_sync_param *sync)
228{
229 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD,
230 DPI_TGEN_VPORCH_RODD);
231}
232
233static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi,
234 struct mtk_dpi_sync_param *sync)
235{
236 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN,
237 DPI_TGEN_VPORCH_REVEN);
238}
239
240static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
241 struct mtk_dpi_polarities *dpi_pol)
242{
243 unsigned int pol;
244 unsigned int mask;
245
246 mask = HSYNC_POL | VSYNC_POL;
247 pol = (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
248 (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
249 if (dpi->conf->is_ck_de_pol) {
250 mask |= CK_POL | DE_POL;
251 pol |= (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ?
252 0 : CK_POL) |
253 (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ?
254 0 : DE_POL);
255 }
256
257 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, mask);
258}
259
260static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
261{
262 mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN);
263}
264
265static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter)
266{
267 mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN);
268}
269
270static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
271{
272 mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE,
273 dpi->conf->hvsize_mask << HSIZE);
274 mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE,
275 dpi->conf->hvsize_mask << VSIZE);
276}
277
278static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi)
279{
280 struct mtk_dpi_yc_limit limit;
281
282 if (drm_default_rgb_quant_range(&dpi->mode) ==
283 HDMI_QUANTIZATION_RANGE_LIMITED) {
284 limit.y_bottom = 0x10;
285 limit.y_top = 0xfe0;
286 limit.c_bottom = 0x10;
287 limit.c_top = 0xfe0;
288 } else {
289 limit.y_bottom = 0;
290 limit.y_top = 0xfff;
291 limit.c_bottom = 0;
292 limit.c_top = 0xfff;
293 }
294
295 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit.y_bottom << Y_LIMINT_BOT,
296 Y_LIMINT_BOT_MASK);
297 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit.y_top << Y_LIMINT_TOP,
298 Y_LIMINT_TOP_MASK);
299 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit.c_bottom << C_LIMIT_BOT,
300 C_LIMIT_BOT_MASK);
301 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit.c_top << C_LIMIT_TOP,
302 C_LIMIT_TOP_MASK);
303}
304
305static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi,
306 enum mtk_dpi_out_bit_num num)
307{
308 u32 val;
309
310 switch (num) {
311 case MTK_DPI_OUT_BIT_NUM_8BITS:
312 val = OUT_BIT_8;
313 break;
314 case MTK_DPI_OUT_BIT_NUM_10BITS:
315 val = OUT_BIT_10;
316 break;
317 case MTK_DPI_OUT_BIT_NUM_12BITS:
318 val = OUT_BIT_12;
319 break;
320 case MTK_DPI_OUT_BIT_NUM_16BITS:
321 val = OUT_BIT_16;
322 break;
323 default:
324 val = OUT_BIT_8;
325 break;
326 }
327 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT,
328 OUT_BIT_MASK);
329}
330
331static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi,
332 enum mtk_dpi_out_yc_map map)
333{
334 u32 val;
335
336 switch (map) {
337 case MTK_DPI_OUT_YC_MAP_RGB:
338 val = YC_MAP_RGB;
339 break;
340 case MTK_DPI_OUT_YC_MAP_CYCY:
341 val = YC_MAP_CYCY;
342 break;
343 case MTK_DPI_OUT_YC_MAP_YCYC:
344 val = YC_MAP_YCYC;
345 break;
346 case MTK_DPI_OUT_YC_MAP_CY:
347 val = YC_MAP_CY;
348 break;
349 case MTK_DPI_OUT_YC_MAP_YC:
350 val = YC_MAP_YC;
351 break;
352 default:
353 val = YC_MAP_RGB;
354 break;
355 }
356
357 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK);
358}
359
360static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
361 enum mtk_dpi_out_channel_swap swap)
362{
363 u32 val;
364
365 switch (swap) {
366 case MTK_DPI_OUT_CHANNEL_SWAP_RGB:
367 val = SWAP_RGB;
368 break;
369 case MTK_DPI_OUT_CHANNEL_SWAP_GBR:
370 val = SWAP_GBR;
371 break;
372 case MTK_DPI_OUT_CHANNEL_SWAP_BRG:
373 val = SWAP_BRG;
374 break;
375 case MTK_DPI_OUT_CHANNEL_SWAP_RBG:
376 val = SWAP_RBG;
377 break;
378 case MTK_DPI_OUT_CHANNEL_SWAP_GRB:
379 val = SWAP_GRB;
380 break;
381 case MTK_DPI_OUT_CHANNEL_SWAP_BGR:
382 val = SWAP_BGR;
383 break;
384 default:
385 val = SWAP_RGB;
386 break;
387 }
388
389 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
390 val << dpi->conf->channel_swap_shift,
391 CH_SWAP_MASK << dpi->conf->channel_swap_shift);
392}
393
394static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
395{
396 mtk_dpi_mask(dpi, DPI_CON, enable ? dpi->conf->yuv422_en_bit : 0,
397 dpi->conf->yuv422_en_bit);
398}
399
400static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
401{
402 mtk_dpi_mask(dpi, DPI_CON, enable ? dpi->conf->csc_enable_bit : 0,
403 dpi->conf->csc_enable_bit);
404}
405
406static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
407{
408 mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP);
409}
410
411static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
412{
413 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
414}
415
416static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
417{
418 if (dpi->conf->edge_sel_en)
419 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
420}
421
422static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
423 enum mtk_dpi_out_color_format format)
424{
425 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
426
427 if (format == MTK_DPI_COLOR_FORMAT_YCBCR_422) {
428 mtk_dpi_config_yuv422_enable(dpi, true);
429 mtk_dpi_config_csc_enable(dpi, true);
430
431 /*
432 * If height is smaller than 720, we need to use RGB_TO_BT601
433 * to transfer to yuv422. Otherwise, we use RGB_TO_JPEG.
434 */
435 mtk_dpi_mask(dpi, DPI_MATRIX_SET, dpi->mode.hdisplay <= 720 ?
436 MATRIX_SEL_RGB_TO_BT601 : MATRIX_SEL_RGB_TO_JPEG,
437 INT_MATRIX_SEL_MASK);
438 } else {
439 mtk_dpi_config_yuv422_enable(dpi, false);
440 mtk_dpi_config_csc_enable(dpi, false);
441 if (dpi->conf->swap_input_support)
442 mtk_dpi_config_swap_input(dpi, false);
443 }
444}
445
446static void mtk_dpi_dual_edge(struct mtk_dpi *dpi)
447{
448 if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
449 (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
450 mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
451 DDR_EN | DDR_4PHASE);
452 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
453 dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE ?
454 EDGE_SEL : 0, EDGE_SEL);
455 if (dpi->conf->edge_cfg_in_mmsys)
456 mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev, MTK_DPI_RGB888_DDR_CON);
457 } else {
458 mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, 0);
459 if (dpi->conf->edge_cfg_in_mmsys)
460 mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev, MTK_DPI_RGB888_SDR_CON);
461 }
462}
463
464static void mtk_dpi_power_off(struct mtk_dpi *dpi)
465{
466 if (WARN_ON(dpi->refcount == 0))
467 return;
468
469 if (--dpi->refcount != 0)
470 return;
471
472 mtk_dpi_disable(dpi);
473 clk_disable_unprepare(dpi->pixel_clk);
474 clk_disable_unprepare(dpi->engine_clk);
475}
476
477static int mtk_dpi_power_on(struct mtk_dpi *dpi)
478{
479 int ret;
480
481 if (++dpi->refcount != 1)
482 return 0;
483
484 ret = clk_prepare_enable(dpi->engine_clk);
485 if (ret) {
486 dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
487 goto err_refcount;
488 }
489
490 ret = clk_prepare_enable(dpi->pixel_clk);
491 if (ret) {
492 dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
493 goto err_pixel;
494 }
495
496 return 0;
497
498err_pixel:
499 clk_disable_unprepare(dpi->engine_clk);
500err_refcount:
501 dpi->refcount--;
502 return ret;
503}
504
505static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
506 struct drm_display_mode *mode)
507{
508 struct mtk_dpi_polarities dpi_pol;
509 struct mtk_dpi_sync_param hsync;
510 struct mtk_dpi_sync_param vsync_lodd = { 0 };
511 struct mtk_dpi_sync_param vsync_leven = { 0 };
512 struct mtk_dpi_sync_param vsync_rodd = { 0 };
513 struct mtk_dpi_sync_param vsync_reven = { 0 };
514 struct videomode vm = { 0 };
515 unsigned long pll_rate;
516 unsigned int factor;
517
518 /* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
519 factor = dpi->conf->cal_factor(mode->clock);
520 drm_display_mode_to_videomode(mode, &vm);
521 pll_rate = vm.pixelclock * factor;
522
523 dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
524 pll_rate, vm.pixelclock);
525
526 clk_set_rate(dpi->tvd_clk, pll_rate);
527 pll_rate = clk_get_rate(dpi->tvd_clk);
528
529 /*
530 * Depending on the IP version, we may output a different amount of
531 * pixels for each iteration: divide the clock by this number and
532 * adjust the display porches accordingly.
533 */
534 vm.pixelclock = pll_rate / factor;
535 vm.pixelclock /= dpi->conf->pixels_per_iter;
536
537 if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
538 (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
539 clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
540 else
541 clk_set_rate(dpi->pixel_clk, vm.pixelclock);
542
543
544 vm.pixelclock = clk_get_rate(dpi->pixel_clk);
545
546 dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n",
547 pll_rate, vm.pixelclock);
548
549 dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
550 dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
551 dpi_pol.hsync_pol = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
552 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
553 dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
554 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
555
556 /*
557 * Depending on the IP version, we may output a different amount of
558 * pixels for each iteration: divide the clock by this number and
559 * adjust the display porches accordingly.
560 */
561 hsync.sync_width = vm.hsync_len / dpi->conf->pixels_per_iter;
562 hsync.back_porch = vm.hback_porch / dpi->conf->pixels_per_iter;
563 hsync.front_porch = vm.hfront_porch / dpi->conf->pixels_per_iter;
564
565 hsync.shift_half_line = false;
566 vsync_lodd.sync_width = vm.vsync_len;
567 vsync_lodd.back_porch = vm.vback_porch;
568 vsync_lodd.front_porch = vm.vfront_porch;
569 vsync_lodd.shift_half_line = false;
570
571 if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
572 mode->flags & DRM_MODE_FLAG_3D_MASK) {
573 vsync_leven = vsync_lodd;
574 vsync_rodd = vsync_lodd;
575 vsync_reven = vsync_lodd;
576 vsync_leven.shift_half_line = true;
577 vsync_reven.shift_half_line = true;
578 } else if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
579 !(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
580 vsync_leven = vsync_lodd;
581 vsync_leven.shift_half_line = true;
582 } else if (!(vm.flags & DISPLAY_FLAGS_INTERLACED) &&
583 mode->flags & DRM_MODE_FLAG_3D_MASK) {
584 vsync_rodd = vsync_lodd;
585 }
586 mtk_dpi_sw_reset(dpi, true);
587 mtk_dpi_config_pol(dpi, &dpi_pol);
588
589 mtk_dpi_config_hsync(dpi, &hsync);
590 mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd);
591 mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd);
592 mtk_dpi_config_vsync_leven(dpi, &vsync_leven);
593 mtk_dpi_config_vsync_reven(dpi, &vsync_reven);
594
595 mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK));
596 mtk_dpi_config_interface(dpi, !!(vm.flags &
597 DISPLAY_FLAGS_INTERLACED));
598 if (vm.flags & DISPLAY_FLAGS_INTERLACED)
599 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive >> 1);
600 else
601 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
602
603 mtk_dpi_config_channel_limit(dpi);
604 mtk_dpi_config_bit_num(dpi, dpi->bit_num);
605 mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
606 mtk_dpi_config_color_format(dpi, dpi->color_format);
607 if (dpi->conf->support_direct_pin) {
608 mtk_dpi_config_yc_map(dpi, dpi->yc_map);
609 mtk_dpi_config_2n_h_fre(dpi);
610 mtk_dpi_dual_edge(dpi);
611 mtk_dpi_config_disable_edge(dpi);
612 }
613 if (dpi->conf->input_2pixel) {
614 mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
615 DPINTF_INPUT_2P_EN);
616 }
617 mtk_dpi_sw_reset(dpi, false);
618
619 return 0;
620}
621
622static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
623 struct drm_bridge_state *bridge_state,
624 struct drm_crtc_state *crtc_state,
625 struct drm_connector_state *conn_state,
626 unsigned int *num_output_fmts)
627{
628 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
629 u32 *output_fmts;
630
631 *num_output_fmts = 0;
632
633 if (!dpi->conf->output_fmts) {
634 dev_err(dpi->dev, "output_fmts should not be null\n");
635 return NULL;
636 }
637
638 output_fmts = kcalloc(dpi->conf->num_output_fmts, sizeof(*output_fmts),
639 GFP_KERNEL);
640 if (!output_fmts)
641 return NULL;
642
643 *num_output_fmts = dpi->conf->num_output_fmts;
644
645 memcpy(output_fmts, dpi->conf->output_fmts,
646 sizeof(*output_fmts) * dpi->conf->num_output_fmts);
647
648 return output_fmts;
649}
650
651static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
652 struct drm_bridge_state *bridge_state,
653 struct drm_crtc_state *crtc_state,
654 struct drm_connector_state *conn_state,
655 u32 output_fmt,
656 unsigned int *num_input_fmts)
657{
658 u32 *input_fmts;
659
660 *num_input_fmts = 0;
661
662 input_fmts = kcalloc(1, sizeof(*input_fmts),
663 GFP_KERNEL);
664 if (!input_fmts)
665 return NULL;
666
667 *num_input_fmts = 1;
668 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
669
670 return input_fmts;
671}
672
673static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
674 struct drm_bridge_state *bridge_state,
675 struct drm_crtc_state *crtc_state,
676 struct drm_connector_state *conn_state)
677{
678 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
679 unsigned int out_bus_format;
680
681 out_bus_format = bridge_state->output_bus_cfg.format;
682
683 if (out_bus_format == MEDIA_BUS_FMT_FIXED)
684 if (dpi->conf->num_output_fmts)
685 out_bus_format = dpi->conf->output_fmts[0];
686
687 dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
688 bridge_state->input_bus_cfg.format,
689 bridge_state->output_bus_cfg.format);
690
691 dpi->output_fmt = out_bus_format;
692 dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
693 dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
694 dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
695 if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
696 dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422;
697 else
698 dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
699
700 return 0;
701}
702
703static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
704 enum drm_bridge_attach_flags flags)
705{
706 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
707 int ret;
708
709 dpi->next_bridge = devm_drm_of_get_bridge(dpi->dev, dpi->dev->of_node, 1, -1);
710 if (IS_ERR(dpi->next_bridge)) {
711 ret = PTR_ERR(dpi->next_bridge);
712 if (ret == -EPROBE_DEFER)
713 return ret;
714
715 /* Old devicetree has only one endpoint */
716 dpi->next_bridge = devm_drm_of_get_bridge(dpi->dev, dpi->dev->of_node, 0, 0);
717 if (IS_ERR(dpi->next_bridge))
718 return dev_err_probe(dpi->dev, PTR_ERR(dpi->next_bridge),
719 "Failed to get bridge\n");
720 }
721
722 return drm_bridge_attach(bridge->encoder, dpi->next_bridge,
723 &dpi->bridge, flags);
724}
725
726static void mtk_dpi_bridge_mode_set(struct drm_bridge *bridge,
727 const struct drm_display_mode *mode,
728 const struct drm_display_mode *adjusted_mode)
729{
730 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
731
732 drm_mode_copy(&dpi->mode, adjusted_mode);
733}
734
735static void mtk_dpi_bridge_disable(struct drm_bridge *bridge)
736{
737 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
738
739 mtk_dpi_power_off(dpi);
740
741 if (dpi->pinctrl && dpi->pins_gpio)
742 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
743}
744
745static void mtk_dpi_bridge_enable(struct drm_bridge *bridge)
746{
747 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
748
749 if (dpi->pinctrl && dpi->pins_dpi)
750 pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
751
752 mtk_dpi_power_on(dpi);
753 mtk_dpi_set_display_mode(dpi, &dpi->mode);
754 mtk_dpi_enable(dpi);
755}
756
757static enum drm_mode_status
758mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
759 const struct drm_display_info *info,
760 const struct drm_display_mode *mode)
761{
762 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
763
764 if (mode->clock > dpi->conf->max_clock_khz)
765 return MODE_CLOCK_HIGH;
766
767 return MODE_OK;
768}
769
770static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
771 .attach = mtk_dpi_bridge_attach,
772 .mode_set = mtk_dpi_bridge_mode_set,
773 .mode_valid = mtk_dpi_bridge_mode_valid,
774 .disable = mtk_dpi_bridge_disable,
775 .enable = mtk_dpi_bridge_enable,
776 .atomic_check = mtk_dpi_bridge_atomic_check,
777 .atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
778 .atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
779 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
780 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
781 .atomic_reset = drm_atomic_helper_bridge_reset,
782};
783
784void mtk_dpi_start(struct device *dev)
785{
786 struct mtk_dpi *dpi = dev_get_drvdata(dev);
787
788 mtk_dpi_power_on(dpi);
789}
790
791void mtk_dpi_stop(struct device *dev)
792{
793 struct mtk_dpi *dpi = dev_get_drvdata(dev);
794
795 mtk_dpi_power_off(dpi);
796}
797
798unsigned int mtk_dpi_encoder_index(struct device *dev)
799{
800 struct mtk_dpi *dpi = dev_get_drvdata(dev);
801 unsigned int encoder_index = drm_encoder_index(&dpi->encoder);
802
803 dev_dbg(dev, "encoder index:%d\n", encoder_index);
804 return encoder_index;
805}
806
807static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
808{
809 struct mtk_dpi *dpi = dev_get_drvdata(dev);
810 struct drm_device *drm_dev = data;
811 struct mtk_drm_private *priv = drm_dev->dev_private;
812 int ret;
813
814 dpi->mmsys_dev = priv->mmsys_dev;
815 ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
816 DRM_MODE_ENCODER_TMDS);
817 if (ret) {
818 dev_err(dev, "Failed to initialize decoder: %d\n", ret);
819 return ret;
820 }
821
822 ret = mtk_find_possible_crtcs(drm_dev, dpi->dev);
823 if (ret < 0)
824 goto err_cleanup;
825 dpi->encoder.possible_crtcs = ret;
826
827 ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL,
828 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
829 if (ret)
830 goto err_cleanup;
831
832 dpi->connector = drm_bridge_connector_init(drm_dev, &dpi->encoder);
833 if (IS_ERR(dpi->connector)) {
834 dev_err(dev, "Unable to create bridge connector\n");
835 ret = PTR_ERR(dpi->connector);
836 goto err_cleanup;
837 }
838 drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
839
840 return 0;
841
842err_cleanup:
843 drm_encoder_cleanup(&dpi->encoder);
844 return ret;
845}
846
847static void mtk_dpi_unbind(struct device *dev, struct device *master,
848 void *data)
849{
850 struct mtk_dpi *dpi = dev_get_drvdata(dev);
851
852 drm_encoder_cleanup(&dpi->encoder);
853}
854
855static const struct component_ops mtk_dpi_component_ops = {
856 .bind = mtk_dpi_bind,
857 .unbind = mtk_dpi_unbind,
858};
859
860static unsigned int mt8173_calculate_factor(int clock)
861{
862 if (clock <= 27000)
863 return 3 << 4;
864 else if (clock <= 84000)
865 return 3 << 3;
866 else if (clock <= 167000)
867 return 3 << 2;
868 else
869 return 3 << 1;
870}
871
872static unsigned int mt2701_calculate_factor(int clock)
873{
874 if (clock <= 64000)
875 return 4;
876 else if (clock <= 128000)
877 return 2;
878 else
879 return 1;
880}
881
882static unsigned int mt8183_calculate_factor(int clock)
883{
884 if (clock <= 27000)
885 return 8;
886 else if (clock <= 167000)
887 return 4;
888 else
889 return 2;
890}
891
892static unsigned int mt8195_dpintf_calculate_factor(int clock)
893{
894 if (clock < 70000)
895 return 4;
896 else if (clock < 200000)
897 return 2;
898 else
899 return 1;
900}
901
902static const u32 mt8173_output_fmts[] = {
903 MEDIA_BUS_FMT_RGB888_1X24,
904};
905
906static const u32 mt8183_output_fmts[] = {
907 MEDIA_BUS_FMT_RGB888_2X12_LE,
908 MEDIA_BUS_FMT_RGB888_2X12_BE,
909};
910
911static const u32 mt8195_output_fmts[] = {
912 MEDIA_BUS_FMT_RGB888_1X24,
913 MEDIA_BUS_FMT_YUYV8_1X16,
914};
915
916static const struct mtk_dpi_conf mt8173_conf = {
917 .cal_factor = mt8173_calculate_factor,
918 .reg_h_fre_con = 0xe0,
919 .max_clock_khz = 300000,
920 .output_fmts = mt8173_output_fmts,
921 .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
922 .pixels_per_iter = 1,
923 .is_ck_de_pol = true,
924 .swap_input_support = true,
925 .support_direct_pin = true,
926 .dimension_mask = HPW_MASK,
927 .hvsize_mask = HSIZE_MASK,
928 .channel_swap_shift = CH_SWAP,
929 .yuv422_en_bit = YUV422_EN,
930 .csc_enable_bit = CSC_ENABLE,
931};
932
933static const struct mtk_dpi_conf mt2701_conf = {
934 .cal_factor = mt2701_calculate_factor,
935 .reg_h_fre_con = 0xb0,
936 .edge_sel_en = true,
937 .max_clock_khz = 150000,
938 .output_fmts = mt8173_output_fmts,
939 .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
940 .pixels_per_iter = 1,
941 .is_ck_de_pol = true,
942 .swap_input_support = true,
943 .support_direct_pin = true,
944 .dimension_mask = HPW_MASK,
945 .hvsize_mask = HSIZE_MASK,
946 .channel_swap_shift = CH_SWAP,
947 .yuv422_en_bit = YUV422_EN,
948 .csc_enable_bit = CSC_ENABLE,
949};
950
951static const struct mtk_dpi_conf mt8183_conf = {
952 .cal_factor = mt8183_calculate_factor,
953 .reg_h_fre_con = 0xe0,
954 .max_clock_khz = 100000,
955 .output_fmts = mt8183_output_fmts,
956 .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
957 .pixels_per_iter = 1,
958 .is_ck_de_pol = true,
959 .swap_input_support = true,
960 .support_direct_pin = true,
961 .dimension_mask = HPW_MASK,
962 .hvsize_mask = HSIZE_MASK,
963 .channel_swap_shift = CH_SWAP,
964 .yuv422_en_bit = YUV422_EN,
965 .csc_enable_bit = CSC_ENABLE,
966};
967
968static const struct mtk_dpi_conf mt8186_conf = {
969 .cal_factor = mt8183_calculate_factor,
970 .reg_h_fre_con = 0xe0,
971 .max_clock_khz = 150000,
972 .output_fmts = mt8183_output_fmts,
973 .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
974 .edge_cfg_in_mmsys = true,
975 .pixels_per_iter = 1,
976 .is_ck_de_pol = true,
977 .swap_input_support = true,
978 .support_direct_pin = true,
979 .dimension_mask = HPW_MASK,
980 .hvsize_mask = HSIZE_MASK,
981 .channel_swap_shift = CH_SWAP,
982 .yuv422_en_bit = YUV422_EN,
983 .csc_enable_bit = CSC_ENABLE,
984};
985
986static const struct mtk_dpi_conf mt8192_conf = {
987 .cal_factor = mt8183_calculate_factor,
988 .reg_h_fre_con = 0xe0,
989 .max_clock_khz = 150000,
990 .output_fmts = mt8183_output_fmts,
991 .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
992 .pixels_per_iter = 1,
993 .is_ck_de_pol = true,
994 .swap_input_support = true,
995 .support_direct_pin = true,
996 .dimension_mask = HPW_MASK,
997 .hvsize_mask = HSIZE_MASK,
998 .channel_swap_shift = CH_SWAP,
999 .yuv422_en_bit = YUV422_EN,
1000 .csc_enable_bit = CSC_ENABLE,
1001};
1002
1003static const struct mtk_dpi_conf mt8195_dpintf_conf = {
1004 .cal_factor = mt8195_dpintf_calculate_factor,
1005 .max_clock_khz = 600000,
1006 .output_fmts = mt8195_output_fmts,
1007 .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
1008 .pixels_per_iter = 4,
1009 .input_2pixel = true,
1010 .dimension_mask = DPINTF_HPW_MASK,
1011 .hvsize_mask = DPINTF_HSIZE_MASK,
1012 .channel_swap_shift = DPINTF_CH_SWAP,
1013 .yuv422_en_bit = DPINTF_YUV422_EN,
1014 .csc_enable_bit = DPINTF_CSC_ENABLE,
1015};
1016
1017static int mtk_dpi_probe(struct platform_device *pdev)
1018{
1019 struct device *dev = &pdev->dev;
1020 struct mtk_dpi *dpi;
1021 int ret;
1022
1023 dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
1024 if (!dpi)
1025 return -ENOMEM;
1026
1027 dpi->dev = dev;
1028 dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);
1029 dpi->output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
1030
1031 dpi->pinctrl = devm_pinctrl_get(&pdev->dev);
1032 if (IS_ERR(dpi->pinctrl)) {
1033 dpi->pinctrl = NULL;
1034 dev_dbg(&pdev->dev, "Cannot find pinctrl!\n");
1035 }
1036 if (dpi->pinctrl) {
1037 dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep");
1038 if (IS_ERR(dpi->pins_gpio)) {
1039 dpi->pins_gpio = NULL;
1040 dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n");
1041 }
1042 if (dpi->pins_gpio)
1043 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
1044
1045 dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default");
1046 if (IS_ERR(dpi->pins_dpi)) {
1047 dpi->pins_dpi = NULL;
1048 dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
1049 }
1050 }
1051 dpi->regs = devm_platform_ioremap_resource(pdev, 0);
1052 if (IS_ERR(dpi->regs))
1053 return dev_err_probe(dev, PTR_ERR(dpi->regs),
1054 "Failed to ioremap mem resource\n");
1055
1056 dpi->engine_clk = devm_clk_get(dev, "engine");
1057 if (IS_ERR(dpi->engine_clk))
1058 return dev_err_probe(dev, PTR_ERR(dpi->engine_clk),
1059 "Failed to get engine clock\n");
1060
1061 dpi->pixel_clk = devm_clk_get(dev, "pixel");
1062 if (IS_ERR(dpi->pixel_clk))
1063 return dev_err_probe(dev, PTR_ERR(dpi->pixel_clk),
1064 "Failed to get pixel clock\n");
1065
1066 dpi->tvd_clk = devm_clk_get(dev, "pll");
1067 if (IS_ERR(dpi->tvd_clk))
1068 return dev_err_probe(dev, PTR_ERR(dpi->tvd_clk),
1069 "Failed to get tvdpll clock\n");
1070
1071 dpi->irq = platform_get_irq(pdev, 0);
1072 if (dpi->irq < 0)
1073 return dpi->irq;
1074
1075 platform_set_drvdata(pdev, dpi);
1076
1077 dpi->bridge.funcs = &mtk_dpi_bridge_funcs;
1078 dpi->bridge.of_node = dev->of_node;
1079 dpi->bridge.type = DRM_MODE_CONNECTOR_DPI;
1080
1081 ret = devm_drm_bridge_add(dev, &dpi->bridge);
1082 if (ret)
1083 return ret;
1084
1085 ret = component_add(dev, &mtk_dpi_component_ops);
1086 if (ret)
1087 return dev_err_probe(dev, ret, "Failed to add component.\n");
1088
1089 return 0;
1090}
1091
1092static void mtk_dpi_remove(struct platform_device *pdev)
1093{
1094 component_del(&pdev->dev, &mtk_dpi_component_ops);
1095}
1096
1097static const struct of_device_id mtk_dpi_of_ids[] = {
1098 { .compatible = "mediatek,mt2701-dpi", .data = &mt2701_conf },
1099 { .compatible = "mediatek,mt8173-dpi", .data = &mt8173_conf },
1100 { .compatible = "mediatek,mt8183-dpi", .data = &mt8183_conf },
1101 { .compatible = "mediatek,mt8186-dpi", .data = &mt8186_conf },
1102 { .compatible = "mediatek,mt8188-dp-intf", .data = &mt8195_dpintf_conf },
1103 { .compatible = "mediatek,mt8192-dpi", .data = &mt8192_conf },
1104 { .compatible = "mediatek,mt8195-dp-intf", .data = &mt8195_dpintf_conf },
1105 { /* sentinel */ },
1106};
1107MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
1108
1109struct platform_driver mtk_dpi_driver = {
1110 .probe = mtk_dpi_probe,
1111 .remove = mtk_dpi_remove,
1112 .driver = {
1113 .name = "mediatek-dpi",
1114 .of_match_table = mtk_dpi_of_ids,
1115 },
1116};