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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/of.h>
12#include <linux/of_device.h>
13#include <linux/of_gpio.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_crtc.h>
24#include <drm/drm_of.h>
25#include <drm/drm_simple_kms_helper.h>
26
27#include "mtk_dpi_regs.h"
28#include "mtk_drm_ddp_comp.h"
29
30enum mtk_dpi_out_bit_num {
31 MTK_DPI_OUT_BIT_NUM_8BITS,
32 MTK_DPI_OUT_BIT_NUM_10BITS,
33 MTK_DPI_OUT_BIT_NUM_12BITS,
34 MTK_DPI_OUT_BIT_NUM_16BITS
35};
36
37enum mtk_dpi_out_yc_map {
38 MTK_DPI_OUT_YC_MAP_RGB,
39 MTK_DPI_OUT_YC_MAP_CYCY,
40 MTK_DPI_OUT_YC_MAP_YCYC,
41 MTK_DPI_OUT_YC_MAP_CY,
42 MTK_DPI_OUT_YC_MAP_YC
43};
44
45enum mtk_dpi_out_channel_swap {
46 MTK_DPI_OUT_CHANNEL_SWAP_RGB,
47 MTK_DPI_OUT_CHANNEL_SWAP_GBR,
48 MTK_DPI_OUT_CHANNEL_SWAP_BRG,
49 MTK_DPI_OUT_CHANNEL_SWAP_RBG,
50 MTK_DPI_OUT_CHANNEL_SWAP_GRB,
51 MTK_DPI_OUT_CHANNEL_SWAP_BGR
52};
53
54enum mtk_dpi_out_color_format {
55 MTK_DPI_COLOR_FORMAT_RGB,
56 MTK_DPI_COLOR_FORMAT_RGB_FULL,
57 MTK_DPI_COLOR_FORMAT_YCBCR_444,
58 MTK_DPI_COLOR_FORMAT_YCBCR_422,
59 MTK_DPI_COLOR_FORMAT_XV_YCC,
60 MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL,
61 MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
62};
63
64struct mtk_dpi {
65 struct mtk_ddp_comp ddp_comp;
66 struct drm_encoder encoder;
67 struct drm_bridge *bridge;
68 void __iomem *regs;
69 struct device *dev;
70 struct clk *engine_clk;
71 struct clk *pixel_clk;
72 struct clk *tvd_clk;
73 int irq;
74 struct drm_display_mode mode;
75 const struct mtk_dpi_conf *conf;
76 enum mtk_dpi_out_color_format color_format;
77 enum mtk_dpi_out_yc_map yc_map;
78 enum mtk_dpi_out_bit_num bit_num;
79 enum mtk_dpi_out_channel_swap channel_swap;
80 struct pinctrl *pinctrl;
81 struct pinctrl_state *pins_gpio;
82 struct pinctrl_state *pins_dpi;
83 int refcount;
84};
85
86static inline struct mtk_dpi *mtk_dpi_from_encoder(struct drm_encoder *e)
87{
88 return container_of(e, struct mtk_dpi, encoder);
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
117struct mtk_dpi_conf {
118 unsigned int (*cal_factor)(int clock);
119 u32 reg_h_fre_con;
120 bool edge_sel_en;
121};
122
123static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
124{
125 u32 tmp = readl(dpi->regs + offset) & ~mask;
126
127 tmp |= (val & mask);
128 writel(tmp, dpi->regs + offset);
129}
130
131static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset)
132{
133 mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST);
134}
135
136static void mtk_dpi_enable(struct mtk_dpi *dpi)
137{
138 mtk_dpi_mask(dpi, DPI_EN, EN, EN);
139}
140
141static void mtk_dpi_disable(struct mtk_dpi *dpi)
142{
143 mtk_dpi_mask(dpi, DPI_EN, 0, EN);
144}
145
146static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
147 struct mtk_dpi_sync_param *sync)
148{
149 mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH,
150 sync->sync_width << HPW, HPW_MASK);
151 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH,
152 sync->back_porch << HBP, HBP_MASK);
153 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
154 HFP_MASK);
155}
156
157static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
158 struct mtk_dpi_sync_param *sync,
159 u32 width_addr, u32 porch_addr)
160{
161 mtk_dpi_mask(dpi, width_addr,
162 sync->sync_width << VSYNC_WIDTH_SHIFT,
163 VSYNC_WIDTH_MASK);
164 mtk_dpi_mask(dpi, width_addr,
165 sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
166 VSYNC_HALF_LINE_MASK);
167 mtk_dpi_mask(dpi, porch_addr,
168 sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
169 VSYNC_BACK_PORCH_MASK);
170 mtk_dpi_mask(dpi, porch_addr,
171 sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
172 VSYNC_FRONT_PORCH_MASK);
173}
174
175static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
176 struct mtk_dpi_sync_param *sync)
177{
178 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH);
179}
180
181static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi,
182 struct mtk_dpi_sync_param *sync)
183{
184 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN,
185 DPI_TGEN_VPORCH_LEVEN);
186}
187
188static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi,
189 struct mtk_dpi_sync_param *sync)
190{
191 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD,
192 DPI_TGEN_VPORCH_RODD);
193}
194
195static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi,
196 struct mtk_dpi_sync_param *sync)
197{
198 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN,
199 DPI_TGEN_VPORCH_REVEN);
200}
201
202static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
203 struct mtk_dpi_polarities *dpi_pol)
204{
205 unsigned int pol;
206
207 pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
208 (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
209 (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
210 (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
211 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
212 CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
213}
214
215static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
216{
217 mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN);
218}
219
220static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter)
221{
222 mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN);
223}
224
225static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
226{
227 mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE, HSIZE_MASK);
228 mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK);
229}
230
231static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi,
232 struct mtk_dpi_yc_limit *limit)
233{
234 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT,
235 Y_LIMINT_BOT_MASK);
236 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_top << Y_LIMINT_TOP,
237 Y_LIMINT_TOP_MASK);
238 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_bottom << C_LIMIT_BOT,
239 C_LIMIT_BOT_MASK);
240 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_top << C_LIMIT_TOP,
241 C_LIMIT_TOP_MASK);
242}
243
244static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi,
245 enum mtk_dpi_out_bit_num num)
246{
247 u32 val;
248
249 switch (num) {
250 case MTK_DPI_OUT_BIT_NUM_8BITS:
251 val = OUT_BIT_8;
252 break;
253 case MTK_DPI_OUT_BIT_NUM_10BITS:
254 val = OUT_BIT_10;
255 break;
256 case MTK_DPI_OUT_BIT_NUM_12BITS:
257 val = OUT_BIT_12;
258 break;
259 case MTK_DPI_OUT_BIT_NUM_16BITS:
260 val = OUT_BIT_16;
261 break;
262 default:
263 val = OUT_BIT_8;
264 break;
265 }
266 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT,
267 OUT_BIT_MASK);
268}
269
270static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi,
271 enum mtk_dpi_out_yc_map map)
272{
273 u32 val;
274
275 switch (map) {
276 case MTK_DPI_OUT_YC_MAP_RGB:
277 val = YC_MAP_RGB;
278 break;
279 case MTK_DPI_OUT_YC_MAP_CYCY:
280 val = YC_MAP_CYCY;
281 break;
282 case MTK_DPI_OUT_YC_MAP_YCYC:
283 val = YC_MAP_YCYC;
284 break;
285 case MTK_DPI_OUT_YC_MAP_CY:
286 val = YC_MAP_CY;
287 break;
288 case MTK_DPI_OUT_YC_MAP_YC:
289 val = YC_MAP_YC;
290 break;
291 default:
292 val = YC_MAP_RGB;
293 break;
294 }
295
296 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK);
297}
298
299static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
300 enum mtk_dpi_out_channel_swap swap)
301{
302 u32 val;
303
304 switch (swap) {
305 case MTK_DPI_OUT_CHANNEL_SWAP_RGB:
306 val = SWAP_RGB;
307 break;
308 case MTK_DPI_OUT_CHANNEL_SWAP_GBR:
309 val = SWAP_GBR;
310 break;
311 case MTK_DPI_OUT_CHANNEL_SWAP_BRG:
312 val = SWAP_BRG;
313 break;
314 case MTK_DPI_OUT_CHANNEL_SWAP_RBG:
315 val = SWAP_RBG;
316 break;
317 case MTK_DPI_OUT_CHANNEL_SWAP_GRB:
318 val = SWAP_GRB;
319 break;
320 case MTK_DPI_OUT_CHANNEL_SWAP_BGR:
321 val = SWAP_BGR;
322 break;
323 default:
324 val = SWAP_RGB;
325 break;
326 }
327
328 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK);
329}
330
331static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
332{
333 mtk_dpi_mask(dpi, DPI_CON, enable ? YUV422_EN : 0, YUV422_EN);
334}
335
336static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
337{
338 mtk_dpi_mask(dpi, DPI_CON, enable ? CSC_ENABLE : 0, CSC_ENABLE);
339}
340
341static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
342{
343 mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP);
344}
345
346static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
347{
348 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
349}
350
351static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
352{
353 if (dpi->conf->edge_sel_en)
354 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
355}
356
357static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
358 enum mtk_dpi_out_color_format format)
359{
360 if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_444) ||
361 (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
362 mtk_dpi_config_yuv422_enable(dpi, false);
363 mtk_dpi_config_csc_enable(dpi, true);
364 mtk_dpi_config_swap_input(dpi, false);
365 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
366 } else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) ||
367 (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
368 mtk_dpi_config_yuv422_enable(dpi, true);
369 mtk_dpi_config_csc_enable(dpi, true);
370 mtk_dpi_config_swap_input(dpi, true);
371 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
372 } else {
373 mtk_dpi_config_yuv422_enable(dpi, false);
374 mtk_dpi_config_csc_enable(dpi, false);
375 mtk_dpi_config_swap_input(dpi, false);
376 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
377 }
378}
379
380static void mtk_dpi_power_off(struct mtk_dpi *dpi)
381{
382 if (WARN_ON(dpi->refcount == 0))
383 return;
384
385 if (--dpi->refcount != 0)
386 return;
387
388 if (dpi->pinctrl && dpi->pins_gpio)
389 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
390
391 mtk_dpi_disable(dpi);
392 clk_disable_unprepare(dpi->pixel_clk);
393 clk_disable_unprepare(dpi->engine_clk);
394}
395
396static int mtk_dpi_power_on(struct mtk_dpi *dpi)
397{
398 int ret;
399
400 if (++dpi->refcount != 1)
401 return 0;
402
403 ret = clk_prepare_enable(dpi->engine_clk);
404 if (ret) {
405 dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
406 goto err_refcount;
407 }
408
409 ret = clk_prepare_enable(dpi->pixel_clk);
410 if (ret) {
411 dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
412 goto err_pixel;
413 }
414
415 if (dpi->pinctrl && dpi->pins_dpi)
416 pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
417
418 mtk_dpi_enable(dpi);
419 return 0;
420
421err_pixel:
422 clk_disable_unprepare(dpi->engine_clk);
423err_refcount:
424 dpi->refcount--;
425 return ret;
426}
427
428static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
429 struct drm_display_mode *mode)
430{
431 struct mtk_dpi_yc_limit limit;
432 struct mtk_dpi_polarities dpi_pol;
433 struct mtk_dpi_sync_param hsync;
434 struct mtk_dpi_sync_param vsync_lodd = { 0 };
435 struct mtk_dpi_sync_param vsync_leven = { 0 };
436 struct mtk_dpi_sync_param vsync_rodd = { 0 };
437 struct mtk_dpi_sync_param vsync_reven = { 0 };
438 struct videomode vm = { 0 };
439 unsigned long pll_rate;
440 unsigned int factor;
441
442 /* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
443 factor = dpi->conf->cal_factor(mode->clock);
444 drm_display_mode_to_videomode(mode, &vm);
445 pll_rate = vm.pixelclock * factor;
446
447 dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
448 pll_rate, vm.pixelclock);
449
450 clk_set_rate(dpi->tvd_clk, pll_rate);
451 pll_rate = clk_get_rate(dpi->tvd_clk);
452
453 vm.pixelclock = pll_rate / factor;
454 clk_set_rate(dpi->pixel_clk, vm.pixelclock);
455 vm.pixelclock = clk_get_rate(dpi->pixel_clk);
456
457 dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n",
458 pll_rate, vm.pixelclock);
459
460 limit.c_bottom = 0x0010;
461 limit.c_top = 0x0FE0;
462 limit.y_bottom = 0x0010;
463 limit.y_top = 0x0FE0;
464
465 dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
466 dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
467 dpi_pol.hsync_pol = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
468 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
469 dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
470 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
471 hsync.sync_width = vm.hsync_len;
472 hsync.back_porch = vm.hback_porch;
473 hsync.front_porch = vm.hfront_porch;
474 hsync.shift_half_line = false;
475 vsync_lodd.sync_width = vm.vsync_len;
476 vsync_lodd.back_porch = vm.vback_porch;
477 vsync_lodd.front_porch = vm.vfront_porch;
478 vsync_lodd.shift_half_line = false;
479
480 if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
481 mode->flags & DRM_MODE_FLAG_3D_MASK) {
482 vsync_leven = vsync_lodd;
483 vsync_rodd = vsync_lodd;
484 vsync_reven = vsync_lodd;
485 vsync_leven.shift_half_line = true;
486 vsync_reven.shift_half_line = true;
487 } else if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
488 !(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
489 vsync_leven = vsync_lodd;
490 vsync_leven.shift_half_line = true;
491 } else if (!(vm.flags & DISPLAY_FLAGS_INTERLACED) &&
492 mode->flags & DRM_MODE_FLAG_3D_MASK) {
493 vsync_rodd = vsync_lodd;
494 }
495 mtk_dpi_sw_reset(dpi, true);
496 mtk_dpi_config_pol(dpi, &dpi_pol);
497
498 mtk_dpi_config_hsync(dpi, &hsync);
499 mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd);
500 mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd);
501 mtk_dpi_config_vsync_leven(dpi, &vsync_leven);
502 mtk_dpi_config_vsync_reven(dpi, &vsync_reven);
503
504 mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK));
505 mtk_dpi_config_interface(dpi, !!(vm.flags &
506 DISPLAY_FLAGS_INTERLACED));
507 if (vm.flags & DISPLAY_FLAGS_INTERLACED)
508 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive >> 1);
509 else
510 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
511
512 mtk_dpi_config_channel_limit(dpi, &limit);
513 mtk_dpi_config_bit_num(dpi, dpi->bit_num);
514 mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
515 mtk_dpi_config_yc_map(dpi, dpi->yc_map);
516 mtk_dpi_config_color_format(dpi, dpi->color_format);
517 mtk_dpi_config_2n_h_fre(dpi);
518 mtk_dpi_config_disable_edge(dpi);
519 mtk_dpi_sw_reset(dpi, false);
520
521 return 0;
522}
523
524static bool mtk_dpi_encoder_mode_fixup(struct drm_encoder *encoder,
525 const struct drm_display_mode *mode,
526 struct drm_display_mode *adjusted_mode)
527{
528 return true;
529}
530
531static void mtk_dpi_encoder_mode_set(struct drm_encoder *encoder,
532 struct drm_display_mode *mode,
533 struct drm_display_mode *adjusted_mode)
534{
535 struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
536
537 drm_mode_copy(&dpi->mode, adjusted_mode);
538}
539
540static void mtk_dpi_encoder_disable(struct drm_encoder *encoder)
541{
542 struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
543
544 mtk_dpi_power_off(dpi);
545}
546
547static void mtk_dpi_encoder_enable(struct drm_encoder *encoder)
548{
549 struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
550
551 mtk_dpi_power_on(dpi);
552 mtk_dpi_set_display_mode(dpi, &dpi->mode);
553}
554
555static int mtk_dpi_atomic_check(struct drm_encoder *encoder,
556 struct drm_crtc_state *crtc_state,
557 struct drm_connector_state *conn_state)
558{
559 return 0;
560}
561
562static const struct drm_encoder_helper_funcs mtk_dpi_encoder_helper_funcs = {
563 .mode_fixup = mtk_dpi_encoder_mode_fixup,
564 .mode_set = mtk_dpi_encoder_mode_set,
565 .disable = mtk_dpi_encoder_disable,
566 .enable = mtk_dpi_encoder_enable,
567 .atomic_check = mtk_dpi_atomic_check,
568};
569
570static void mtk_dpi_start(struct mtk_ddp_comp *comp)
571{
572 struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
573
574 mtk_dpi_power_on(dpi);
575}
576
577static void mtk_dpi_stop(struct mtk_ddp_comp *comp)
578{
579 struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
580
581 mtk_dpi_power_off(dpi);
582}
583
584static const struct mtk_ddp_comp_funcs mtk_dpi_funcs = {
585 .start = mtk_dpi_start,
586 .stop = mtk_dpi_stop,
587};
588
589static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
590{
591 struct mtk_dpi *dpi = dev_get_drvdata(dev);
592 struct drm_device *drm_dev = data;
593 int ret;
594
595 ret = mtk_ddp_comp_register(drm_dev, &dpi->ddp_comp);
596 if (ret < 0) {
597 dev_err(dev, "Failed to register component %pOF: %d\n",
598 dev->of_node, ret);
599 return ret;
600 }
601
602 ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
603 DRM_MODE_ENCODER_TMDS);
604 if (ret) {
605 dev_err(dev, "Failed to initialize decoder: %d\n", ret);
606 goto err_unregister;
607 }
608 drm_encoder_helper_add(&dpi->encoder, &mtk_dpi_encoder_helper_funcs);
609
610 /* Currently DPI0 is fixed to be driven by OVL1 */
611 dpi->encoder.possible_crtcs = BIT(1);
612
613 ret = drm_bridge_attach(&dpi->encoder, dpi->bridge, NULL, 0);
614 if (ret) {
615 dev_err(dev, "Failed to attach bridge: %d\n", ret);
616 goto err_cleanup;
617 }
618
619 dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
620 dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
621 dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
622 dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
623
624 return 0;
625
626err_cleanup:
627 drm_encoder_cleanup(&dpi->encoder);
628err_unregister:
629 mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
630 return ret;
631}
632
633static void mtk_dpi_unbind(struct device *dev, struct device *master,
634 void *data)
635{
636 struct mtk_dpi *dpi = dev_get_drvdata(dev);
637 struct drm_device *drm_dev = data;
638
639 drm_encoder_cleanup(&dpi->encoder);
640 mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
641}
642
643static const struct component_ops mtk_dpi_component_ops = {
644 .bind = mtk_dpi_bind,
645 .unbind = mtk_dpi_unbind,
646};
647
648static unsigned int mt8173_calculate_factor(int clock)
649{
650 if (clock <= 27000)
651 return 3 << 4;
652 else if (clock <= 84000)
653 return 3 << 3;
654 else if (clock <= 167000)
655 return 3 << 2;
656 else
657 return 3 << 1;
658}
659
660static unsigned int mt2701_calculate_factor(int clock)
661{
662 if (clock <= 64000)
663 return 4;
664 else if (clock <= 128000)
665 return 2;
666 else
667 return 1;
668}
669
670static unsigned int mt8183_calculate_factor(int clock)
671{
672 if (clock <= 27000)
673 return 8;
674 else if (clock <= 167000)
675 return 4;
676 else
677 return 2;
678}
679
680static const struct mtk_dpi_conf mt8173_conf = {
681 .cal_factor = mt8173_calculate_factor,
682 .reg_h_fre_con = 0xe0,
683};
684
685static const struct mtk_dpi_conf mt2701_conf = {
686 .cal_factor = mt2701_calculate_factor,
687 .reg_h_fre_con = 0xb0,
688 .edge_sel_en = true,
689};
690
691static const struct mtk_dpi_conf mt8183_conf = {
692 .cal_factor = mt8183_calculate_factor,
693 .reg_h_fre_con = 0xe0,
694};
695
696static int mtk_dpi_probe(struct platform_device *pdev)
697{
698 struct device *dev = &pdev->dev;
699 struct mtk_dpi *dpi;
700 struct resource *mem;
701 int comp_id;
702 int ret;
703
704 dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
705 if (!dpi)
706 return -ENOMEM;
707
708 dpi->dev = dev;
709 dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);
710
711 dpi->pinctrl = devm_pinctrl_get(&pdev->dev);
712 if (IS_ERR(dpi->pinctrl)) {
713 dpi->pinctrl = NULL;
714 dev_dbg(&pdev->dev, "Cannot find pinctrl!\n");
715 }
716 if (dpi->pinctrl) {
717 dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep");
718 if (IS_ERR(dpi->pins_gpio)) {
719 dpi->pins_gpio = NULL;
720 dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n");
721 }
722 if (dpi->pins_gpio)
723 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
724
725 dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default");
726 if (IS_ERR(dpi->pins_dpi)) {
727 dpi->pins_dpi = NULL;
728 dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
729 }
730 }
731 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
732 dpi->regs = devm_ioremap_resource(dev, mem);
733 if (IS_ERR(dpi->regs)) {
734 ret = PTR_ERR(dpi->regs);
735 dev_err(dev, "Failed to ioremap mem resource: %d\n", ret);
736 return ret;
737 }
738
739 dpi->engine_clk = devm_clk_get(dev, "engine");
740 if (IS_ERR(dpi->engine_clk)) {
741 ret = PTR_ERR(dpi->engine_clk);
742 if (ret != -EPROBE_DEFER)
743 dev_err(dev, "Failed to get engine clock: %d\n", ret);
744
745 return ret;
746 }
747
748 dpi->pixel_clk = devm_clk_get(dev, "pixel");
749 if (IS_ERR(dpi->pixel_clk)) {
750 ret = PTR_ERR(dpi->pixel_clk);
751 if (ret != -EPROBE_DEFER)
752 dev_err(dev, "Failed to get pixel clock: %d\n", ret);
753
754 return ret;
755 }
756
757 dpi->tvd_clk = devm_clk_get(dev, "pll");
758 if (IS_ERR(dpi->tvd_clk)) {
759 ret = PTR_ERR(dpi->tvd_clk);
760 if (ret != -EPROBE_DEFER)
761 dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
762
763 return ret;
764 }
765
766 dpi->irq = platform_get_irq(pdev, 0);
767 if (dpi->irq <= 0) {
768 dev_err(dev, "Failed to get irq: %d\n", dpi->irq);
769 return -EINVAL;
770 }
771
772 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
773 NULL, &dpi->bridge);
774 if (ret)
775 return ret;
776
777 dev_info(dev, "Found bridge node: %pOF\n", dpi->bridge->of_node);
778
779 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI);
780 if (comp_id < 0) {
781 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
782 return comp_id;
783 }
784
785 ret = mtk_ddp_comp_init(dev, dev->of_node, &dpi->ddp_comp, comp_id,
786 &mtk_dpi_funcs);
787 if (ret) {
788 dev_err(dev, "Failed to initialize component: %d\n", ret);
789 return ret;
790 }
791
792 platform_set_drvdata(pdev, dpi);
793
794 ret = component_add(dev, &mtk_dpi_component_ops);
795 if (ret) {
796 dev_err(dev, "Failed to add component: %d\n", ret);
797 return ret;
798 }
799
800 return 0;
801}
802
803static int mtk_dpi_remove(struct platform_device *pdev)
804{
805 component_del(&pdev->dev, &mtk_dpi_component_ops);
806
807 return 0;
808}
809
810static const struct of_device_id mtk_dpi_of_ids[] = {
811 { .compatible = "mediatek,mt2701-dpi",
812 .data = &mt2701_conf,
813 },
814 { .compatible = "mediatek,mt8173-dpi",
815 .data = &mt8173_conf,
816 },
817 { .compatible = "mediatek,mt8183-dpi",
818 .data = &mt8183_conf,
819 },
820 { },
821};
822
823struct platform_driver mtk_dpi_driver = {
824 .probe = mtk_dpi_probe,
825 .remove = mtk_dpi_remove,
826 .driver = {
827 .name = "mediatek-dpi",
828 .of_match_table = mtk_dpi_of_ids,
829 },
830};