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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_device.h>
14#include <linux/of_graph.h>
15#include <linux/pinctrl/consumer.h>
16#include <linux/platform_device.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_disp_drv.h"
30#include "mtk_dpi_regs.h"
31#include "mtk_drm_ddp_comp.h"
32
33enum mtk_dpi_out_bit_num {
34 MTK_DPI_OUT_BIT_NUM_8BITS,
35 MTK_DPI_OUT_BIT_NUM_10BITS,
36 MTK_DPI_OUT_BIT_NUM_12BITS,
37 MTK_DPI_OUT_BIT_NUM_16BITS
38};
39
40enum mtk_dpi_out_yc_map {
41 MTK_DPI_OUT_YC_MAP_RGB,
42 MTK_DPI_OUT_YC_MAP_CYCY,
43 MTK_DPI_OUT_YC_MAP_YCYC,
44 MTK_DPI_OUT_YC_MAP_CY,
45 MTK_DPI_OUT_YC_MAP_YC
46};
47
48enum mtk_dpi_out_channel_swap {
49 MTK_DPI_OUT_CHANNEL_SWAP_RGB,
50 MTK_DPI_OUT_CHANNEL_SWAP_GBR,
51 MTK_DPI_OUT_CHANNEL_SWAP_BRG,
52 MTK_DPI_OUT_CHANNEL_SWAP_RBG,
53 MTK_DPI_OUT_CHANNEL_SWAP_GRB,
54 MTK_DPI_OUT_CHANNEL_SWAP_BGR
55};
56
57enum mtk_dpi_out_color_format {
58 MTK_DPI_COLOR_FORMAT_RGB,
59 MTK_DPI_COLOR_FORMAT_YCBCR_422
60};
61
62struct mtk_dpi {
63 struct drm_encoder encoder;
64 struct drm_bridge bridge;
65 struct drm_bridge *next_bridge;
66 struct drm_connector *connector;
67 void __iomem *regs;
68 struct device *dev;
69 struct clk *engine_clk;
70 struct clk *pixel_clk;
71 struct clk *tvd_clk;
72 int irq;
73 struct drm_display_mode mode;
74 const struct mtk_dpi_conf *conf;
75 enum mtk_dpi_out_color_format color_format;
76 enum mtk_dpi_out_yc_map yc_map;
77 enum mtk_dpi_out_bit_num bit_num;
78 enum mtk_dpi_out_channel_swap channel_swap;
79 struct pinctrl *pinctrl;
80 struct pinctrl_state *pins_gpio;
81 struct pinctrl_state *pins_dpi;
82 u32 output_fmt;
83 int refcount;
84};
85
86static inline struct mtk_dpi *bridge_to_dpi(struct drm_bridge *b)
87{
88 return container_of(b, struct mtk_dpi, bridge);
89}
90
91enum mtk_dpi_polarity {
92 MTK_DPI_POLARITY_RISING,
93 MTK_DPI_POLARITY_FALLING,
94};
95
96struct mtk_dpi_polarities {
97 enum mtk_dpi_polarity de_pol;
98 enum mtk_dpi_polarity ck_pol;
99 enum mtk_dpi_polarity hsync_pol;
100 enum mtk_dpi_polarity vsync_pol;
101};
102
103struct mtk_dpi_sync_param {
104 u32 sync_width;
105 u32 front_porch;
106 u32 back_porch;
107 bool shift_half_line;
108};
109
110struct mtk_dpi_yc_limit {
111 u16 y_top;
112 u16 y_bottom;
113 u16 c_top;
114 u16 c_bottom;
115};
116
117/**
118 * struct mtk_dpi_conf - Configuration of mediatek dpi.
119 * @cal_factor: Callback function to calculate factor value.
120 * @reg_h_fre_con: Register address of frequency control.
121 * @max_clock_khz: Max clock frequency supported for this SoCs in khz units.
122 * @edge_sel_en: Enable of edge selection.
123 * @output_fmts: Array of supported output formats.
124 * @num_output_fmts: Quantity of supported output formats.
125 * @is_ck_de_pol: Support CK/DE polarity.
126 * @swap_input_support: Support input swap function.
127 * @support_direct_pin: IP supports direct connection to dpi panels.
128 * @input_2pixel: Input pixel of dp_intf is 2 pixel per round, so enable this
129 * config to enable this feature.
130 * @dimension_mask: Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH
131 * (no shift).
132 * @hvsize_mask: Mask of HSIZE and VSIZE mask (no shift).
133 * @channel_swap_shift: Shift value of channel swap.
134 * @yuv422_en_bit: Enable bit of yuv422.
135 * @csc_enable_bit: Enable bit of CSC.
136 * @pixels_per_iter: Quantity of transferred pixels per iteration.
137 */
138struct mtk_dpi_conf {
139 unsigned int (*cal_factor)(int clock);
140 u32 reg_h_fre_con;
141 u32 max_clock_khz;
142 bool edge_sel_en;
143 const u32 *output_fmts;
144 u32 num_output_fmts;
145 bool is_ck_de_pol;
146 bool swap_input_support;
147 bool support_direct_pin;
148 bool input_2pixel;
149 u32 dimension_mask;
150 u32 hvsize_mask;
151 u32 channel_swap_shift;
152 u32 yuv422_en_bit;
153 u32 csc_enable_bit;
154 u32 pixels_per_iter;
155};
156
157static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
158{
159 u32 tmp = readl(dpi->regs + offset) & ~mask;
160
161 tmp |= (val & mask);
162 writel(tmp, dpi->regs + offset);
163}
164
165static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset)
166{
167 mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST);
168}
169
170static void mtk_dpi_enable(struct mtk_dpi *dpi)
171{
172 mtk_dpi_mask(dpi, DPI_EN, EN, EN);
173}
174
175static void mtk_dpi_disable(struct mtk_dpi *dpi)
176{
177 mtk_dpi_mask(dpi, DPI_EN, 0, EN);
178}
179
180static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
181 struct mtk_dpi_sync_param *sync)
182{
183 mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH, sync->sync_width << HPW,
184 dpi->conf->dimension_mask << HPW);
185 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->back_porch << HBP,
186 dpi->conf->dimension_mask << HBP);
187 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
188 dpi->conf->dimension_mask << HFP);
189}
190
191static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
192 struct mtk_dpi_sync_param *sync,
193 u32 width_addr, u32 porch_addr)
194{
195 mtk_dpi_mask(dpi, width_addr,
196 sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
197 VSYNC_HALF_LINE_MASK);
198 mtk_dpi_mask(dpi, width_addr,
199 sync->sync_width << VSYNC_WIDTH_SHIFT,
200 dpi->conf->dimension_mask << VSYNC_WIDTH_SHIFT);
201 mtk_dpi_mask(dpi, porch_addr,
202 sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
203 dpi->conf->dimension_mask << VSYNC_BACK_PORCH_SHIFT);
204 mtk_dpi_mask(dpi, porch_addr,
205 sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
206 dpi->conf->dimension_mask << VSYNC_FRONT_PORCH_SHIFT);
207}
208
209static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
210 struct mtk_dpi_sync_param *sync)
211{
212 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH);
213}
214
215static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi,
216 struct mtk_dpi_sync_param *sync)
217{
218 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN,
219 DPI_TGEN_VPORCH_LEVEN);
220}
221
222static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi,
223 struct mtk_dpi_sync_param *sync)
224{
225 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD,
226 DPI_TGEN_VPORCH_RODD);
227}
228
229static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi,
230 struct mtk_dpi_sync_param *sync)
231{
232 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN,
233 DPI_TGEN_VPORCH_REVEN);
234}
235
236static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
237 struct mtk_dpi_polarities *dpi_pol)
238{
239 unsigned int pol;
240 unsigned int mask;
241
242 mask = HSYNC_POL | VSYNC_POL;
243 pol = (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
244 (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
245 if (dpi->conf->is_ck_de_pol) {
246 mask |= CK_POL | DE_POL;
247 pol |= (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ?
248 0 : CK_POL) |
249 (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ?
250 0 : DE_POL);
251 }
252
253 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, mask);
254}
255
256static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
257{
258 mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN);
259}
260
261static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter)
262{
263 mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN);
264}
265
266static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
267{
268 mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE,
269 dpi->conf->hvsize_mask << HSIZE);
270 mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE,
271 dpi->conf->hvsize_mask << VSIZE);
272}
273
274static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi)
275{
276 struct mtk_dpi_yc_limit limit;
277
278 if (drm_default_rgb_quant_range(&dpi->mode) ==
279 HDMI_QUANTIZATION_RANGE_LIMITED) {
280 limit.y_bottom = 0x10;
281 limit.y_top = 0xfe0;
282 limit.c_bottom = 0x10;
283 limit.c_top = 0xfe0;
284 } else {
285 limit.y_bottom = 0;
286 limit.y_top = 0xfff;
287 limit.c_bottom = 0;
288 limit.c_top = 0xfff;
289 }
290
291 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit.y_bottom << Y_LIMINT_BOT,
292 Y_LIMINT_BOT_MASK);
293 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit.y_top << Y_LIMINT_TOP,
294 Y_LIMINT_TOP_MASK);
295 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit.c_bottom << C_LIMIT_BOT,
296 C_LIMIT_BOT_MASK);
297 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit.c_top << C_LIMIT_TOP,
298 C_LIMIT_TOP_MASK);
299}
300
301static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi,
302 enum mtk_dpi_out_bit_num num)
303{
304 u32 val;
305
306 switch (num) {
307 case MTK_DPI_OUT_BIT_NUM_8BITS:
308 val = OUT_BIT_8;
309 break;
310 case MTK_DPI_OUT_BIT_NUM_10BITS:
311 val = OUT_BIT_10;
312 break;
313 case MTK_DPI_OUT_BIT_NUM_12BITS:
314 val = OUT_BIT_12;
315 break;
316 case MTK_DPI_OUT_BIT_NUM_16BITS:
317 val = OUT_BIT_16;
318 break;
319 default:
320 val = OUT_BIT_8;
321 break;
322 }
323 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT,
324 OUT_BIT_MASK);
325}
326
327static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi,
328 enum mtk_dpi_out_yc_map map)
329{
330 u32 val;
331
332 switch (map) {
333 case MTK_DPI_OUT_YC_MAP_RGB:
334 val = YC_MAP_RGB;
335 break;
336 case MTK_DPI_OUT_YC_MAP_CYCY:
337 val = YC_MAP_CYCY;
338 break;
339 case MTK_DPI_OUT_YC_MAP_YCYC:
340 val = YC_MAP_YCYC;
341 break;
342 case MTK_DPI_OUT_YC_MAP_CY:
343 val = YC_MAP_CY;
344 break;
345 case MTK_DPI_OUT_YC_MAP_YC:
346 val = YC_MAP_YC;
347 break;
348 default:
349 val = YC_MAP_RGB;
350 break;
351 }
352
353 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK);
354}
355
356static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
357 enum mtk_dpi_out_channel_swap swap)
358{
359 u32 val;
360
361 switch (swap) {
362 case MTK_DPI_OUT_CHANNEL_SWAP_RGB:
363 val = SWAP_RGB;
364 break;
365 case MTK_DPI_OUT_CHANNEL_SWAP_GBR:
366 val = SWAP_GBR;
367 break;
368 case MTK_DPI_OUT_CHANNEL_SWAP_BRG:
369 val = SWAP_BRG;
370 break;
371 case MTK_DPI_OUT_CHANNEL_SWAP_RBG:
372 val = SWAP_RBG;
373 break;
374 case MTK_DPI_OUT_CHANNEL_SWAP_GRB:
375 val = SWAP_GRB;
376 break;
377 case MTK_DPI_OUT_CHANNEL_SWAP_BGR:
378 val = SWAP_BGR;
379 break;
380 default:
381 val = SWAP_RGB;
382 break;
383 }
384
385 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
386 val << dpi->conf->channel_swap_shift,
387 CH_SWAP_MASK << dpi->conf->channel_swap_shift);
388}
389
390static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
391{
392 mtk_dpi_mask(dpi, DPI_CON, enable ? dpi->conf->yuv422_en_bit : 0,
393 dpi->conf->yuv422_en_bit);
394}
395
396static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
397{
398 mtk_dpi_mask(dpi, DPI_CON, enable ? dpi->conf->csc_enable_bit : 0,
399 dpi->conf->csc_enable_bit);
400}
401
402static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
403{
404 mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP);
405}
406
407static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
408{
409 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
410}
411
412static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
413{
414 if (dpi->conf->edge_sel_en)
415 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
416}
417
418static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
419 enum mtk_dpi_out_color_format format)
420{
421 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
422
423 if (format == MTK_DPI_COLOR_FORMAT_YCBCR_422) {
424 mtk_dpi_config_yuv422_enable(dpi, true);
425 mtk_dpi_config_csc_enable(dpi, true);
426
427 /*
428 * If height is smaller than 720, we need to use RGB_TO_BT601
429 * to transfer to yuv422. Otherwise, we use RGB_TO_JPEG.
430 */
431 mtk_dpi_mask(dpi, DPI_MATRIX_SET, dpi->mode.hdisplay <= 720 ?
432 MATRIX_SEL_RGB_TO_BT601 : MATRIX_SEL_RGB_TO_JPEG,
433 INT_MATRIX_SEL_MASK);
434 } else {
435 mtk_dpi_config_yuv422_enable(dpi, false);
436 mtk_dpi_config_csc_enable(dpi, false);
437 if (dpi->conf->swap_input_support)
438 mtk_dpi_config_swap_input(dpi, false);
439 }
440}
441
442static void mtk_dpi_dual_edge(struct mtk_dpi *dpi)
443{
444 if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
445 (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
446 mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
447 DDR_EN | DDR_4PHASE);
448 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
449 dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE ?
450 EDGE_SEL : 0, EDGE_SEL);
451 } else {
452 mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, 0);
453 }
454}
455
456static void mtk_dpi_power_off(struct mtk_dpi *dpi)
457{
458 if (WARN_ON(dpi->refcount == 0))
459 return;
460
461 if (--dpi->refcount != 0)
462 return;
463
464 mtk_dpi_disable(dpi);
465 clk_disable_unprepare(dpi->pixel_clk);
466 clk_disable_unprepare(dpi->engine_clk);
467}
468
469static int mtk_dpi_power_on(struct mtk_dpi *dpi)
470{
471 int ret;
472
473 if (++dpi->refcount != 1)
474 return 0;
475
476 ret = clk_prepare_enable(dpi->engine_clk);
477 if (ret) {
478 dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
479 goto err_refcount;
480 }
481
482 ret = clk_prepare_enable(dpi->pixel_clk);
483 if (ret) {
484 dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
485 goto err_pixel;
486 }
487
488 return 0;
489
490err_pixel:
491 clk_disable_unprepare(dpi->engine_clk);
492err_refcount:
493 dpi->refcount--;
494 return ret;
495}
496
497static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
498 struct drm_display_mode *mode)
499{
500 struct mtk_dpi_polarities dpi_pol;
501 struct mtk_dpi_sync_param hsync;
502 struct mtk_dpi_sync_param vsync_lodd = { 0 };
503 struct mtk_dpi_sync_param vsync_leven = { 0 };
504 struct mtk_dpi_sync_param vsync_rodd = { 0 };
505 struct mtk_dpi_sync_param vsync_reven = { 0 };
506 struct videomode vm = { 0 };
507 unsigned long pll_rate;
508 unsigned int factor;
509
510 /* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
511 factor = dpi->conf->cal_factor(mode->clock);
512 drm_display_mode_to_videomode(mode, &vm);
513 pll_rate = vm.pixelclock * factor;
514
515 dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
516 pll_rate, vm.pixelclock);
517
518 clk_set_rate(dpi->tvd_clk, pll_rate);
519 pll_rate = clk_get_rate(dpi->tvd_clk);
520
521 /*
522 * Depending on the IP version, we may output a different amount of
523 * pixels for each iteration: divide the clock by this number and
524 * adjust the display porches accordingly.
525 */
526 vm.pixelclock = pll_rate / factor;
527 vm.pixelclock /= dpi->conf->pixels_per_iter;
528
529 if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
530 (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
531 clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
532 else
533 clk_set_rate(dpi->pixel_clk, vm.pixelclock);
534
535
536 vm.pixelclock = clk_get_rate(dpi->pixel_clk);
537
538 dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n",
539 pll_rate, vm.pixelclock);
540
541 dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
542 dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
543 dpi_pol.hsync_pol = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
544 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
545 dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
546 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
547
548 /*
549 * Depending on the IP version, we may output a different amount of
550 * pixels for each iteration: divide the clock by this number and
551 * adjust the display porches accordingly.
552 */
553 hsync.sync_width = vm.hsync_len / dpi->conf->pixels_per_iter;
554 hsync.back_porch = vm.hback_porch / dpi->conf->pixels_per_iter;
555 hsync.front_porch = vm.hfront_porch / dpi->conf->pixels_per_iter;
556
557 hsync.shift_half_line = false;
558 vsync_lodd.sync_width = vm.vsync_len;
559 vsync_lodd.back_porch = vm.vback_porch;
560 vsync_lodd.front_porch = vm.vfront_porch;
561 vsync_lodd.shift_half_line = false;
562
563 if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
564 mode->flags & DRM_MODE_FLAG_3D_MASK) {
565 vsync_leven = vsync_lodd;
566 vsync_rodd = vsync_lodd;
567 vsync_reven = vsync_lodd;
568 vsync_leven.shift_half_line = true;
569 vsync_reven.shift_half_line = true;
570 } else if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
571 !(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
572 vsync_leven = vsync_lodd;
573 vsync_leven.shift_half_line = true;
574 } else if (!(vm.flags & DISPLAY_FLAGS_INTERLACED) &&
575 mode->flags & DRM_MODE_FLAG_3D_MASK) {
576 vsync_rodd = vsync_lodd;
577 }
578 mtk_dpi_sw_reset(dpi, true);
579 mtk_dpi_config_pol(dpi, &dpi_pol);
580
581 mtk_dpi_config_hsync(dpi, &hsync);
582 mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd);
583 mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd);
584 mtk_dpi_config_vsync_leven(dpi, &vsync_leven);
585 mtk_dpi_config_vsync_reven(dpi, &vsync_reven);
586
587 mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK));
588 mtk_dpi_config_interface(dpi, !!(vm.flags &
589 DISPLAY_FLAGS_INTERLACED));
590 if (vm.flags & DISPLAY_FLAGS_INTERLACED)
591 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive >> 1);
592 else
593 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
594
595 mtk_dpi_config_channel_limit(dpi);
596 mtk_dpi_config_bit_num(dpi, dpi->bit_num);
597 mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
598 mtk_dpi_config_color_format(dpi, dpi->color_format);
599 if (dpi->conf->support_direct_pin) {
600 mtk_dpi_config_yc_map(dpi, dpi->yc_map);
601 mtk_dpi_config_2n_h_fre(dpi);
602 mtk_dpi_dual_edge(dpi);
603 mtk_dpi_config_disable_edge(dpi);
604 }
605 if (dpi->conf->input_2pixel) {
606 mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
607 DPINTF_INPUT_2P_EN);
608 }
609 mtk_dpi_sw_reset(dpi, false);
610
611 return 0;
612}
613
614static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
615 struct drm_bridge_state *bridge_state,
616 struct drm_crtc_state *crtc_state,
617 struct drm_connector_state *conn_state,
618 unsigned int *num_output_fmts)
619{
620 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
621 u32 *output_fmts;
622
623 *num_output_fmts = 0;
624
625 if (!dpi->conf->output_fmts) {
626 dev_err(dpi->dev, "output_fmts should not be null\n");
627 return NULL;
628 }
629
630 output_fmts = kcalloc(dpi->conf->num_output_fmts, sizeof(*output_fmts),
631 GFP_KERNEL);
632 if (!output_fmts)
633 return NULL;
634
635 *num_output_fmts = dpi->conf->num_output_fmts;
636
637 memcpy(output_fmts, dpi->conf->output_fmts,
638 sizeof(*output_fmts) * dpi->conf->num_output_fmts);
639
640 return output_fmts;
641}
642
643static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
644 struct drm_bridge_state *bridge_state,
645 struct drm_crtc_state *crtc_state,
646 struct drm_connector_state *conn_state,
647 u32 output_fmt,
648 unsigned int *num_input_fmts)
649{
650 u32 *input_fmts;
651
652 *num_input_fmts = 0;
653
654 input_fmts = kcalloc(1, sizeof(*input_fmts),
655 GFP_KERNEL);
656 if (!input_fmts)
657 return NULL;
658
659 *num_input_fmts = 1;
660 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
661
662 return input_fmts;
663}
664
665static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
666 struct drm_bridge_state *bridge_state,
667 struct drm_crtc_state *crtc_state,
668 struct drm_connector_state *conn_state)
669{
670 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
671 unsigned int out_bus_format;
672
673 out_bus_format = bridge_state->output_bus_cfg.format;
674
675 if (out_bus_format == MEDIA_BUS_FMT_FIXED)
676 if (dpi->conf->num_output_fmts)
677 out_bus_format = dpi->conf->output_fmts[0];
678
679 dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
680 bridge_state->input_bus_cfg.format,
681 bridge_state->output_bus_cfg.format);
682
683 dpi->output_fmt = out_bus_format;
684 dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
685 dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
686 dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
687 if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
688 dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422;
689 else
690 dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
691
692 return 0;
693}
694
695static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
696 enum drm_bridge_attach_flags flags)
697{
698 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
699
700 return drm_bridge_attach(bridge->encoder, dpi->next_bridge,
701 &dpi->bridge, flags);
702}
703
704static void mtk_dpi_bridge_mode_set(struct drm_bridge *bridge,
705 const struct drm_display_mode *mode,
706 const struct drm_display_mode *adjusted_mode)
707{
708 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
709
710 drm_mode_copy(&dpi->mode, adjusted_mode);
711}
712
713static void mtk_dpi_bridge_disable(struct drm_bridge *bridge)
714{
715 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
716
717 mtk_dpi_power_off(dpi);
718
719 if (dpi->pinctrl && dpi->pins_gpio)
720 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
721}
722
723static void mtk_dpi_bridge_enable(struct drm_bridge *bridge)
724{
725 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
726
727 if (dpi->pinctrl && dpi->pins_dpi)
728 pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
729
730 mtk_dpi_power_on(dpi);
731 mtk_dpi_set_display_mode(dpi, &dpi->mode);
732 mtk_dpi_enable(dpi);
733}
734
735static enum drm_mode_status
736mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
737 const struct drm_display_info *info,
738 const struct drm_display_mode *mode)
739{
740 struct mtk_dpi *dpi = bridge_to_dpi(bridge);
741
742 if (mode->clock > dpi->conf->max_clock_khz)
743 return MODE_CLOCK_HIGH;
744
745 return MODE_OK;
746}
747
748static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
749 .attach = mtk_dpi_bridge_attach,
750 .mode_set = mtk_dpi_bridge_mode_set,
751 .mode_valid = mtk_dpi_bridge_mode_valid,
752 .disable = mtk_dpi_bridge_disable,
753 .enable = mtk_dpi_bridge_enable,
754 .atomic_check = mtk_dpi_bridge_atomic_check,
755 .atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
756 .atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
757 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
758 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
759 .atomic_reset = drm_atomic_helper_bridge_reset,
760};
761
762void mtk_dpi_start(struct device *dev)
763{
764 struct mtk_dpi *dpi = dev_get_drvdata(dev);
765
766 mtk_dpi_power_on(dpi);
767}
768
769void mtk_dpi_stop(struct device *dev)
770{
771 struct mtk_dpi *dpi = dev_get_drvdata(dev);
772
773 mtk_dpi_power_off(dpi);
774}
775
776static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
777{
778 struct mtk_dpi *dpi = dev_get_drvdata(dev);
779 struct drm_device *drm_dev = data;
780 int ret;
781
782 ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
783 DRM_MODE_ENCODER_TMDS);
784 if (ret) {
785 dev_err(dev, "Failed to initialize decoder: %d\n", ret);
786 return ret;
787 }
788
789 dpi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm_dev, dpi->dev);
790
791 ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL,
792 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
793 if (ret)
794 goto err_cleanup;
795
796 dpi->connector = drm_bridge_connector_init(drm_dev, &dpi->encoder);
797 if (IS_ERR(dpi->connector)) {
798 dev_err(dev, "Unable to create bridge connector\n");
799 ret = PTR_ERR(dpi->connector);
800 goto err_cleanup;
801 }
802 drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
803
804 return 0;
805
806err_cleanup:
807 drm_encoder_cleanup(&dpi->encoder);
808 return ret;
809}
810
811static void mtk_dpi_unbind(struct device *dev, struct device *master,
812 void *data)
813{
814 struct mtk_dpi *dpi = dev_get_drvdata(dev);
815
816 drm_encoder_cleanup(&dpi->encoder);
817}
818
819static const struct component_ops mtk_dpi_component_ops = {
820 .bind = mtk_dpi_bind,
821 .unbind = mtk_dpi_unbind,
822};
823
824static unsigned int mt8173_calculate_factor(int clock)
825{
826 if (clock <= 27000)
827 return 3 << 4;
828 else if (clock <= 84000)
829 return 3 << 3;
830 else if (clock <= 167000)
831 return 3 << 2;
832 else
833 return 3 << 1;
834}
835
836static unsigned int mt2701_calculate_factor(int clock)
837{
838 if (clock <= 64000)
839 return 4;
840 else if (clock <= 128000)
841 return 2;
842 else
843 return 1;
844}
845
846static unsigned int mt8183_calculate_factor(int clock)
847{
848 if (clock <= 27000)
849 return 8;
850 else if (clock <= 167000)
851 return 4;
852 else
853 return 2;
854}
855
856static unsigned int mt8195_dpintf_calculate_factor(int clock)
857{
858 if (clock < 70000)
859 return 4;
860 else if (clock < 200000)
861 return 2;
862 else
863 return 1;
864}
865
866static const u32 mt8173_output_fmts[] = {
867 MEDIA_BUS_FMT_RGB888_1X24,
868};
869
870static const u32 mt8183_output_fmts[] = {
871 MEDIA_BUS_FMT_RGB888_2X12_LE,
872 MEDIA_BUS_FMT_RGB888_2X12_BE,
873};
874
875static const u32 mt8195_output_fmts[] = {
876 MEDIA_BUS_FMT_RGB888_1X24,
877 MEDIA_BUS_FMT_YUYV8_1X16,
878};
879
880static const struct mtk_dpi_conf mt8173_conf = {
881 .cal_factor = mt8173_calculate_factor,
882 .reg_h_fre_con = 0xe0,
883 .max_clock_khz = 300000,
884 .output_fmts = mt8173_output_fmts,
885 .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
886 .pixels_per_iter = 1,
887 .is_ck_de_pol = true,
888 .swap_input_support = true,
889 .support_direct_pin = true,
890 .dimension_mask = HPW_MASK,
891 .hvsize_mask = HSIZE_MASK,
892 .channel_swap_shift = CH_SWAP,
893 .yuv422_en_bit = YUV422_EN,
894 .csc_enable_bit = CSC_ENABLE,
895};
896
897static const struct mtk_dpi_conf mt2701_conf = {
898 .cal_factor = mt2701_calculate_factor,
899 .reg_h_fre_con = 0xb0,
900 .edge_sel_en = true,
901 .max_clock_khz = 150000,
902 .output_fmts = mt8173_output_fmts,
903 .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
904 .pixels_per_iter = 1,
905 .is_ck_de_pol = true,
906 .swap_input_support = true,
907 .support_direct_pin = true,
908 .dimension_mask = HPW_MASK,
909 .hvsize_mask = HSIZE_MASK,
910 .channel_swap_shift = CH_SWAP,
911 .yuv422_en_bit = YUV422_EN,
912 .csc_enable_bit = CSC_ENABLE,
913};
914
915static const struct mtk_dpi_conf mt8183_conf = {
916 .cal_factor = mt8183_calculate_factor,
917 .reg_h_fre_con = 0xe0,
918 .max_clock_khz = 100000,
919 .output_fmts = mt8183_output_fmts,
920 .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
921 .pixels_per_iter = 1,
922 .is_ck_de_pol = true,
923 .swap_input_support = true,
924 .support_direct_pin = true,
925 .dimension_mask = HPW_MASK,
926 .hvsize_mask = HSIZE_MASK,
927 .channel_swap_shift = CH_SWAP,
928 .yuv422_en_bit = YUV422_EN,
929 .csc_enable_bit = CSC_ENABLE,
930};
931
932static const struct mtk_dpi_conf mt8188_dpintf_conf = {
933 .cal_factor = mt8195_dpintf_calculate_factor,
934 .max_clock_khz = 600000,
935 .output_fmts = mt8195_output_fmts,
936 .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
937 .pixels_per_iter = 4,
938 .input_2pixel = false,
939 .dimension_mask = DPINTF_HPW_MASK,
940 .hvsize_mask = DPINTF_HSIZE_MASK,
941 .channel_swap_shift = DPINTF_CH_SWAP,
942 .yuv422_en_bit = DPINTF_YUV422_EN,
943 .csc_enable_bit = DPINTF_CSC_ENABLE,
944};
945
946static const struct mtk_dpi_conf mt8192_conf = {
947 .cal_factor = mt8183_calculate_factor,
948 .reg_h_fre_con = 0xe0,
949 .max_clock_khz = 150000,
950 .output_fmts = mt8183_output_fmts,
951 .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
952 .pixels_per_iter = 1,
953 .is_ck_de_pol = true,
954 .swap_input_support = true,
955 .support_direct_pin = true,
956 .dimension_mask = HPW_MASK,
957 .hvsize_mask = HSIZE_MASK,
958 .channel_swap_shift = CH_SWAP,
959 .yuv422_en_bit = YUV422_EN,
960 .csc_enable_bit = CSC_ENABLE,
961};
962
963static const struct mtk_dpi_conf mt8195_dpintf_conf = {
964 .cal_factor = mt8195_dpintf_calculate_factor,
965 .max_clock_khz = 600000,
966 .output_fmts = mt8195_output_fmts,
967 .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
968 .pixels_per_iter = 4,
969 .input_2pixel = true,
970 .dimension_mask = DPINTF_HPW_MASK,
971 .hvsize_mask = DPINTF_HSIZE_MASK,
972 .channel_swap_shift = DPINTF_CH_SWAP,
973 .yuv422_en_bit = DPINTF_YUV422_EN,
974 .csc_enable_bit = DPINTF_CSC_ENABLE,
975};
976
977static int mtk_dpi_probe(struct platform_device *pdev)
978{
979 struct device *dev = &pdev->dev;
980 struct mtk_dpi *dpi;
981 struct resource *mem;
982 int ret;
983
984 dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
985 if (!dpi)
986 return -ENOMEM;
987
988 dpi->dev = dev;
989 dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);
990 dpi->output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
991
992 dpi->pinctrl = devm_pinctrl_get(&pdev->dev);
993 if (IS_ERR(dpi->pinctrl)) {
994 dpi->pinctrl = NULL;
995 dev_dbg(&pdev->dev, "Cannot find pinctrl!\n");
996 }
997 if (dpi->pinctrl) {
998 dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep");
999 if (IS_ERR(dpi->pins_gpio)) {
1000 dpi->pins_gpio = NULL;
1001 dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n");
1002 }
1003 if (dpi->pins_gpio)
1004 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
1005
1006 dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default");
1007 if (IS_ERR(dpi->pins_dpi)) {
1008 dpi->pins_dpi = NULL;
1009 dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
1010 }
1011 }
1012 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1013 dpi->regs = devm_ioremap_resource(dev, mem);
1014 if (IS_ERR(dpi->regs)) {
1015 ret = PTR_ERR(dpi->regs);
1016 dev_err(dev, "Failed to ioremap mem resource: %d\n", ret);
1017 return ret;
1018 }
1019
1020 dpi->engine_clk = devm_clk_get(dev, "engine");
1021 if (IS_ERR(dpi->engine_clk)) {
1022 ret = PTR_ERR(dpi->engine_clk);
1023 if (ret != -EPROBE_DEFER)
1024 dev_err(dev, "Failed to get engine clock: %d\n", ret);
1025
1026 return ret;
1027 }
1028
1029 dpi->pixel_clk = devm_clk_get(dev, "pixel");
1030 if (IS_ERR(dpi->pixel_clk)) {
1031 ret = PTR_ERR(dpi->pixel_clk);
1032 if (ret != -EPROBE_DEFER)
1033 dev_err(dev, "Failed to get pixel clock: %d\n", ret);
1034
1035 return ret;
1036 }
1037
1038 dpi->tvd_clk = devm_clk_get(dev, "pll");
1039 if (IS_ERR(dpi->tvd_clk)) {
1040 ret = PTR_ERR(dpi->tvd_clk);
1041 if (ret != -EPROBE_DEFER)
1042 dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
1043
1044 return ret;
1045 }
1046
1047 dpi->irq = platform_get_irq(pdev, 0);
1048 if (dpi->irq <= 0)
1049 return -EINVAL;
1050
1051 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
1052 NULL, &dpi->next_bridge);
1053 if (ret)
1054 return ret;
1055
1056 dev_info(dev, "Found bridge node: %pOF\n", dpi->next_bridge->of_node);
1057
1058 platform_set_drvdata(pdev, dpi);
1059
1060 dpi->bridge.funcs = &mtk_dpi_bridge_funcs;
1061 dpi->bridge.of_node = dev->of_node;
1062 dpi->bridge.type = DRM_MODE_CONNECTOR_DPI;
1063
1064 drm_bridge_add(&dpi->bridge);
1065
1066 ret = component_add(dev, &mtk_dpi_component_ops);
1067 if (ret) {
1068 drm_bridge_remove(&dpi->bridge);
1069 dev_err(dev, "Failed to add component: %d\n", ret);
1070 return ret;
1071 }
1072
1073 return 0;
1074}
1075
1076static int mtk_dpi_remove(struct platform_device *pdev)
1077{
1078 struct mtk_dpi *dpi = platform_get_drvdata(pdev);
1079
1080 component_del(&pdev->dev, &mtk_dpi_component_ops);
1081 drm_bridge_remove(&dpi->bridge);
1082
1083 return 0;
1084}
1085
1086static const struct of_device_id mtk_dpi_of_ids[] = {
1087 { .compatible = "mediatek,mt2701-dpi",
1088 .data = &mt2701_conf,
1089 },
1090 { .compatible = "mediatek,mt8173-dpi",
1091 .data = &mt8173_conf,
1092 },
1093 { .compatible = "mediatek,mt8183-dpi",
1094 .data = &mt8183_conf,
1095 },
1096 { .compatible = "mediatek,mt8188-dp-intf",
1097 .data = &mt8188_dpintf_conf,
1098 },
1099 { .compatible = "mediatek,mt8192-dpi",
1100 .data = &mt8192_conf,
1101 },
1102 { .compatible = "mediatek,mt8195-dp-intf",
1103 .data = &mt8195_dpintf_conf,
1104 },
1105 { },
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};