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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ZynqMP Display Controller Driver
4 *
5 * Copyright (C) 2017 - 2020 Xilinx, Inc.
6 *
7 * Authors:
8 * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
9 * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 */
11
12#include <drm/drm_atomic.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_atomic_uapi.h>
15#include <drm/drm_crtc.h>
16#include <drm/drm_device.h>
17#include <drm/drm_fb_cma_helper.h>
18#include <drm/drm_fourcc.h>
19#include <drm/drm_framebuffer.h>
20#include <drm/drm_managed.h>
21#include <drm/drm_plane.h>
22#include <drm/drm_plane_helper.h>
23#include <drm/drm_vblank.h>
24
25#include <linux/clk.h>
26#include <linux/delay.h>
27#include <linux/dma-mapping.h>
28#include <linux/dmaengine.h>
29#include <linux/module.h>
30#include <linux/of.h>
31#include <linux/of_dma.h>
32#include <linux/platform_device.h>
33#include <linux/pm_runtime.h>
34#include <linux/spinlock.h>
35
36#include "zynqmp_disp.h"
37#include "zynqmp_disp_regs.h"
38#include "zynqmp_dp.h"
39#include "zynqmp_dpsub.h"
40
41/*
42 * Overview
43 * --------
44 *
45 * The display controller part of ZynqMP DP subsystem, made of the Audio/Video
46 * Buffer Manager, the Video Rendering Pipeline (blender) and the Audio Mixer.
47 *
48 * +------------------------------------------------------------+
49 * +--------+ | +----------------+ +-----------+ |
50 * | DPDMA | --->| | --> | Video | Video +-------------+ |
51 * | 4x vid | | | | | Rendering | -+--> | | | +------+
52 * | 2x aud | | | Audio/Video | --> | Pipeline | | | DisplayPort |---> | PHY0 |
53 * +--------+ | | Buffer Manager | +-----------+ | | Source | | +------+
54 * | | and STC | +-----------+ | | Controller | | +------+
55 * Live Video --->| | --> | Audio | Audio | |---> | PHY1 |
56 * | | | | Mixer | --+-> | | | +------+
57 * Live Audio --->| | --> | | || +-------------+ |
58 * | +----------------+ +-----------+ || |
59 * +---------------------------------------||-------------------+
60 * vv
61 * Blended Video and
62 * Mixed Audio to PL
63 *
64 * Only non-live input from the DPDMA and output to the DisplayPort Source
65 * Controller are currently supported. Interface with the programmable logic
66 * for live streams is not implemented.
67 *
68 * The display controller code creates planes for the DPDMA video and graphics
69 * layers, and a CRTC for the Video Rendering Pipeline.
70 */
71
72#define ZYNQMP_DISP_AV_BUF_NUM_VID_GFX_BUFFERS 4
73#define ZYNQMP_DISP_AV_BUF_NUM_BUFFERS 6
74
75#define ZYNQMP_DISP_NUM_LAYERS 2
76#define ZYNQMP_DISP_MAX_NUM_SUB_PLANES 3
77
78/**
79 * struct zynqmp_disp_format - Display subsystem format information
80 * @drm_fmt: DRM format (4CC)
81 * @buf_fmt: AV buffer format
82 * @bus_fmt: Media bus formats (live formats)
83 * @swap: Flag to swap R & B for RGB formats, and U & V for YUV formats
84 * @sf: Scaling factors for color components
85 */
86struct zynqmp_disp_format {
87 u32 drm_fmt;
88 u32 buf_fmt;
89 u32 bus_fmt;
90 bool swap;
91 const u32 *sf;
92};
93
94/**
95 * enum zynqmp_disp_id - Layer identifier
96 * @ZYNQMP_DISP_LAYER_VID: Video layer
97 * @ZYNQMP_DISP_LAYER_GFX: Graphics layer
98 */
99enum zynqmp_disp_layer_id {
100 ZYNQMP_DISP_LAYER_VID,
101 ZYNQMP_DISP_LAYER_GFX
102};
103
104/**
105 * enum zynqmp_disp_layer_mode - Layer mode
106 * @ZYNQMP_DISP_LAYER_NONLIVE: non-live (memory) mode
107 * @ZYNQMP_DISP_LAYER_LIVE: live (stream) mode
108 */
109enum zynqmp_disp_layer_mode {
110 ZYNQMP_DISP_LAYER_NONLIVE,
111 ZYNQMP_DISP_LAYER_LIVE
112};
113
114/**
115 * struct zynqmp_disp_layer_dma - DMA channel for one data plane of a layer
116 * @chan: DMA channel
117 * @xt: Interleaved DMA descriptor template
118 * @sgl: Data chunk for dma_interleaved_template
119 */
120struct zynqmp_disp_layer_dma {
121 struct dma_chan *chan;
122 struct dma_interleaved_template xt;
123 struct data_chunk sgl;
124};
125
126/**
127 * struct zynqmp_disp_layer_info - Static layer information
128 * @formats: Array of supported formats
129 * @num_formats: Number of formats in @formats array
130 * @num_channels: Number of DMA channels
131 */
132struct zynqmp_disp_layer_info {
133 const struct zynqmp_disp_format *formats;
134 unsigned int num_formats;
135 unsigned int num_channels;
136};
137
138/**
139 * struct zynqmp_disp_layer - Display layer (DRM plane)
140 * @plane: DRM plane
141 * @id: Layer ID
142 * @disp: Back pointer to struct zynqmp_disp
143 * @info: Static layer information
144 * @dmas: DMA channels
145 * @disp_fmt: Current format information
146 * @drm_fmt: Current DRM format information
147 * @mode: Current operation mode
148 */
149struct zynqmp_disp_layer {
150 struct drm_plane plane;
151 enum zynqmp_disp_layer_id id;
152 struct zynqmp_disp *disp;
153 const struct zynqmp_disp_layer_info *info;
154
155 struct zynqmp_disp_layer_dma dmas[ZYNQMP_DISP_MAX_NUM_SUB_PLANES];
156
157 const struct zynqmp_disp_format *disp_fmt;
158 const struct drm_format_info *drm_fmt;
159 enum zynqmp_disp_layer_mode mode;
160};
161
162/**
163 * struct zynqmp_disp_blend - Blender
164 * @base: Registers I/O base address
165 */
166struct zynqmp_disp_blend {
167 void __iomem *base;
168};
169
170/**
171 * struct zynqmp_disp_avbuf - Audio/video buffer manager
172 * @base: Registers I/O base address
173 */
174struct zynqmp_disp_avbuf {
175 void __iomem *base;
176};
177
178/**
179 * struct zynqmp_disp_audio - Audio mixer
180 * @base: Registers I/O base address
181 * @clk: Audio clock
182 * @clk_from_ps: True of the audio clock comes from PS, false from PL
183 */
184struct zynqmp_disp_audio {
185 void __iomem *base;
186 struct clk *clk;
187 bool clk_from_ps;
188};
189
190/**
191 * struct zynqmp_disp - Display controller
192 * @dev: Device structure
193 * @drm: DRM core
194 * @dpsub: Display subsystem
195 * @crtc: DRM CRTC
196 * @blend: Blender (video rendering pipeline)
197 * @avbuf: Audio/video buffer manager
198 * @audio: Audio mixer
199 * @layers: Layers (planes)
200 * @event: Pending vblank event request
201 * @pclk: Pixel clock
202 * @pclk_from_ps: True of the video clock comes from PS, false from PL
203 */
204struct zynqmp_disp {
205 struct device *dev;
206 struct drm_device *drm;
207 struct zynqmp_dpsub *dpsub;
208
209 struct drm_crtc crtc;
210
211 struct zynqmp_disp_blend blend;
212 struct zynqmp_disp_avbuf avbuf;
213 struct zynqmp_disp_audio audio;
214
215 struct zynqmp_disp_layer layers[ZYNQMP_DISP_NUM_LAYERS];
216
217 struct drm_pending_vblank_event *event;
218
219 struct clk *pclk;
220 bool pclk_from_ps;
221};
222
223/* -----------------------------------------------------------------------------
224 * Audio/Video Buffer Manager
225 */
226
227static const u32 scaling_factors_444[] = {
228 ZYNQMP_DISP_AV_BUF_4BIT_SF,
229 ZYNQMP_DISP_AV_BUF_4BIT_SF,
230 ZYNQMP_DISP_AV_BUF_4BIT_SF,
231};
232
233static const u32 scaling_factors_555[] = {
234 ZYNQMP_DISP_AV_BUF_5BIT_SF,
235 ZYNQMP_DISP_AV_BUF_5BIT_SF,
236 ZYNQMP_DISP_AV_BUF_5BIT_SF,
237};
238
239static const u32 scaling_factors_565[] = {
240 ZYNQMP_DISP_AV_BUF_5BIT_SF,
241 ZYNQMP_DISP_AV_BUF_6BIT_SF,
242 ZYNQMP_DISP_AV_BUF_5BIT_SF,
243};
244
245static const u32 scaling_factors_666[] = {
246 ZYNQMP_DISP_AV_BUF_6BIT_SF,
247 ZYNQMP_DISP_AV_BUF_6BIT_SF,
248 ZYNQMP_DISP_AV_BUF_6BIT_SF,
249};
250
251static const u32 scaling_factors_888[] = {
252 ZYNQMP_DISP_AV_BUF_8BIT_SF,
253 ZYNQMP_DISP_AV_BUF_8BIT_SF,
254 ZYNQMP_DISP_AV_BUF_8BIT_SF,
255};
256
257static const u32 scaling_factors_101010[] = {
258 ZYNQMP_DISP_AV_BUF_10BIT_SF,
259 ZYNQMP_DISP_AV_BUF_10BIT_SF,
260 ZYNQMP_DISP_AV_BUF_10BIT_SF,
261};
262
263/* List of video layer formats */
264static const struct zynqmp_disp_format avbuf_vid_fmts[] = {
265 {
266 .drm_fmt = DRM_FORMAT_VYUY,
267 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY,
268 .swap = true,
269 .sf = scaling_factors_888,
270 }, {
271 .drm_fmt = DRM_FORMAT_UYVY,
272 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY,
273 .swap = false,
274 .sf = scaling_factors_888,
275 }, {
276 .drm_fmt = DRM_FORMAT_YUYV,
277 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV,
278 .swap = false,
279 .sf = scaling_factors_888,
280 }, {
281 .drm_fmt = DRM_FORMAT_YVYU,
282 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV,
283 .swap = true,
284 .sf = scaling_factors_888,
285 }, {
286 .drm_fmt = DRM_FORMAT_YUV422,
287 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16,
288 .swap = false,
289 .sf = scaling_factors_888,
290 }, {
291 .drm_fmt = DRM_FORMAT_YVU422,
292 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16,
293 .swap = true,
294 .sf = scaling_factors_888,
295 }, {
296 .drm_fmt = DRM_FORMAT_YUV444,
297 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24,
298 .swap = false,
299 .sf = scaling_factors_888,
300 }, {
301 .drm_fmt = DRM_FORMAT_YVU444,
302 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24,
303 .swap = true,
304 .sf = scaling_factors_888,
305 }, {
306 .drm_fmt = DRM_FORMAT_NV16,
307 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI,
308 .swap = false,
309 .sf = scaling_factors_888,
310 }, {
311 .drm_fmt = DRM_FORMAT_NV61,
312 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI,
313 .swap = true,
314 .sf = scaling_factors_888,
315 }, {
316 .drm_fmt = DRM_FORMAT_BGR888,
317 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888,
318 .swap = false,
319 .sf = scaling_factors_888,
320 }, {
321 .drm_fmt = DRM_FORMAT_RGB888,
322 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888,
323 .swap = true,
324 .sf = scaling_factors_888,
325 }, {
326 .drm_fmt = DRM_FORMAT_XBGR8888,
327 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880,
328 .swap = false,
329 .sf = scaling_factors_888,
330 }, {
331 .drm_fmt = DRM_FORMAT_XRGB8888,
332 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880,
333 .swap = true,
334 .sf = scaling_factors_888,
335 }, {
336 .drm_fmt = DRM_FORMAT_XBGR2101010,
337 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10,
338 .swap = false,
339 .sf = scaling_factors_101010,
340 }, {
341 .drm_fmt = DRM_FORMAT_XRGB2101010,
342 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10,
343 .swap = true,
344 .sf = scaling_factors_101010,
345 }, {
346 .drm_fmt = DRM_FORMAT_YUV420,
347 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420,
348 .swap = false,
349 .sf = scaling_factors_888,
350 }, {
351 .drm_fmt = DRM_FORMAT_YVU420,
352 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420,
353 .swap = true,
354 .sf = scaling_factors_888,
355 }, {
356 .drm_fmt = DRM_FORMAT_NV12,
357 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420,
358 .swap = false,
359 .sf = scaling_factors_888,
360 }, {
361 .drm_fmt = DRM_FORMAT_NV21,
362 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420,
363 .swap = true,
364 .sf = scaling_factors_888,
365 },
366};
367
368/* List of graphics layer formats */
369static const struct zynqmp_disp_format avbuf_gfx_fmts[] = {
370 {
371 .drm_fmt = DRM_FORMAT_ABGR8888,
372 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888,
373 .swap = false,
374 .sf = scaling_factors_888,
375 }, {
376 .drm_fmt = DRM_FORMAT_ARGB8888,
377 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888,
378 .swap = true,
379 .sf = scaling_factors_888,
380 }, {
381 .drm_fmt = DRM_FORMAT_RGBA8888,
382 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888,
383 .swap = false,
384 .sf = scaling_factors_888,
385 }, {
386 .drm_fmt = DRM_FORMAT_BGRA8888,
387 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888,
388 .swap = true,
389 .sf = scaling_factors_888,
390 }, {
391 .drm_fmt = DRM_FORMAT_BGR888,
392 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB888,
393 .swap = false,
394 .sf = scaling_factors_888,
395 }, {
396 .drm_fmt = DRM_FORMAT_RGB888,
397 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_BGR888,
398 .swap = false,
399 .sf = scaling_factors_888,
400 }, {
401 .drm_fmt = DRM_FORMAT_RGBA5551,
402 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551,
403 .swap = false,
404 .sf = scaling_factors_555,
405 }, {
406 .drm_fmt = DRM_FORMAT_BGRA5551,
407 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551,
408 .swap = true,
409 .sf = scaling_factors_555,
410 }, {
411 .drm_fmt = DRM_FORMAT_RGBA4444,
412 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444,
413 .swap = false,
414 .sf = scaling_factors_444,
415 }, {
416 .drm_fmt = DRM_FORMAT_BGRA4444,
417 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444,
418 .swap = true,
419 .sf = scaling_factors_444,
420 }, {
421 .drm_fmt = DRM_FORMAT_RGB565,
422 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565,
423 .swap = false,
424 .sf = scaling_factors_565,
425 }, {
426 .drm_fmt = DRM_FORMAT_BGR565,
427 .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565,
428 .swap = true,
429 .sf = scaling_factors_565,
430 },
431};
432
433static u32 zynqmp_disp_avbuf_read(struct zynqmp_disp_avbuf *avbuf, int reg)
434{
435 return readl(avbuf->base + reg);
436}
437
438static void zynqmp_disp_avbuf_write(struct zynqmp_disp_avbuf *avbuf,
439 int reg, u32 val)
440{
441 writel(val, avbuf->base + reg);
442}
443
444/**
445 * zynqmp_disp_avbuf_set_format - Set the input format for a layer
446 * @avbuf: Audio/video buffer manager
447 * @layer: The layer ID
448 * @fmt: The format information
449 *
450 * Set the video buffer manager format for @layer to @fmt.
451 */
452static void zynqmp_disp_avbuf_set_format(struct zynqmp_disp_avbuf *avbuf,
453 enum zynqmp_disp_layer_id layer,
454 const struct zynqmp_disp_format *fmt)
455{
456 unsigned int i;
457 u32 val;
458
459 val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_FMT);
460 val &= layer == ZYNQMP_DISP_LAYER_VID
461 ? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
462 : ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
463 val |= fmt->buf_fmt;
464 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_FMT, val);
465
466 for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_SF; i++) {
467 unsigned int reg = layer == ZYNQMP_DISP_LAYER_VID
468 ? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
469 : ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
470
471 zynqmp_disp_avbuf_write(avbuf, reg, fmt->sf[i]);
472 }
473}
474
475/**
476 * zynqmp_disp_avbuf_set_clocks_sources - Set the clocks sources
477 * @avbuf: Audio/video buffer manager
478 * @video_from_ps: True if the video clock originates from the PS
479 * @audio_from_ps: True if the audio clock originates from the PS
480 * @timings_internal: True if video timings are generated internally
481 *
482 * Set the source for the video and audio clocks, as well as for the video
483 * timings. Clocks can originate from the PS or PL, and timings can be
484 * generated internally or externally.
485 */
486static void
487zynqmp_disp_avbuf_set_clocks_sources(struct zynqmp_disp_avbuf *avbuf,
488 bool video_from_ps, bool audio_from_ps,
489 bool timings_internal)
490{
491 u32 val = 0;
492
493 if (video_from_ps)
494 val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_FROM_PS;
495 if (audio_from_ps)
496 val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_AUD_FROM_PS;
497 if (timings_internal)
498 val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_INTERNAL_TIMING;
499
500 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CLK_SRC, val);
501}
502
503/**
504 * zynqmp_disp_avbuf_enable_channels - Enable buffer channels
505 * @avbuf: Audio/video buffer manager
506 *
507 * Enable all (video and audio) buffer channels.
508 */
509static void zynqmp_disp_avbuf_enable_channels(struct zynqmp_disp_avbuf *avbuf)
510{
511 unsigned int i;
512 u32 val;
513
514 val = ZYNQMP_DISP_AV_BUF_CHBUF_EN |
515 (ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_MAX <<
516 ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT);
517
518 for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_VID_GFX_BUFFERS; i++)
519 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CHBUF(i),
520 val);
521
522 val = ZYNQMP_DISP_AV_BUF_CHBUF_EN |
523 (ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_AUD_MAX <<
524 ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT);
525
526 for (; i < ZYNQMP_DISP_AV_BUF_NUM_BUFFERS; i++)
527 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CHBUF(i),
528 val);
529}
530
531/**
532 * zynqmp_disp_avbuf_disable_channels - Disable buffer channels
533 * @avbuf: Audio/video buffer manager
534 *
535 * Disable all (video and audio) buffer channels.
536 */
537static void zynqmp_disp_avbuf_disable_channels(struct zynqmp_disp_avbuf *avbuf)
538{
539 unsigned int i;
540
541 for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_BUFFERS; i++)
542 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CHBUF(i),
543 ZYNQMP_DISP_AV_BUF_CHBUF_FLUSH);
544}
545
546/**
547 * zynqmp_disp_avbuf_enable_audio - Enable audio
548 * @avbuf: Audio/video buffer manager
549 *
550 * Enable all audio buffers with a non-live (memory) source.
551 */
552static void zynqmp_disp_avbuf_enable_audio(struct zynqmp_disp_avbuf *avbuf)
553{
554 u32 val;
555
556 val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
557 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
558 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MEM;
559 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
560 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
561}
562
563/**
564 * zynqmp_disp_avbuf_disable_audio - Disable audio
565 * @avbuf: Audio/video buffer manager
566 *
567 * Disable all audio buffers.
568 */
569static void zynqmp_disp_avbuf_disable_audio(struct zynqmp_disp_avbuf *avbuf)
570{
571 u32 val;
572
573 val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
574 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
575 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_DISABLE;
576 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
577 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
578}
579
580/**
581 * zynqmp_disp_avbuf_enable_video - Enable a video layer
582 * @avbuf: Audio/video buffer manager
583 * @layer: The layer ID
584 * @mode: Operating mode of layer
585 *
586 * Enable the video/graphics buffer for @layer.
587 */
588static void zynqmp_disp_avbuf_enable_video(struct zynqmp_disp_avbuf *avbuf,
589 enum zynqmp_disp_layer_id layer,
590 enum zynqmp_disp_layer_mode mode)
591{
592 u32 val;
593
594 val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
595 if (layer == ZYNQMP_DISP_LAYER_VID) {
596 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
597 if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
598 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MEM;
599 else
600 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_LIVE;
601 } else {
602 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
603 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
604 if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
605 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
606 else
607 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_LIVE;
608 }
609 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
610}
611
612/**
613 * zynqmp_disp_avbuf_disable_video - Disable a video layer
614 * @avbuf: Audio/video buffer manager
615 * @layer: The layer ID
616 *
617 * Disable the video/graphics buffer for @layer.
618 */
619static void zynqmp_disp_avbuf_disable_video(struct zynqmp_disp_avbuf *avbuf,
620 enum zynqmp_disp_layer_id layer)
621{
622 u32 val;
623
624 val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
625 if (layer == ZYNQMP_DISP_LAYER_VID) {
626 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
627 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_NONE;
628 } else {
629 val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
630 val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_DISABLE;
631 }
632 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
633}
634
635/**
636 * zynqmp_disp_avbuf_enable - Enable the video pipe
637 * @avbuf: Audio/video buffer manager
638 *
639 * De-assert the video pipe reset.
640 */
641static void zynqmp_disp_avbuf_enable(struct zynqmp_disp_avbuf *avbuf)
642{
643 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_SRST_REG, 0);
644}
645
646/**
647 * zynqmp_disp_avbuf_disable - Disable the video pipe
648 * @avbuf: Audio/video buffer manager
649 *
650 * Assert the video pipe reset.
651 */
652static void zynqmp_disp_avbuf_disable(struct zynqmp_disp_avbuf *avbuf)
653{
654 zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_SRST_REG,
655 ZYNQMP_DISP_AV_BUF_SRST_REG_VID_RST);
656}
657
658/* -----------------------------------------------------------------------------
659 * Blender (Video Pipeline)
660 */
661
662static void zynqmp_disp_blend_write(struct zynqmp_disp_blend *blend,
663 int reg, u32 val)
664{
665 writel(val, blend->base + reg);
666}
667
668/*
669 * Colorspace conversion matrices.
670 *
671 * Hardcode RGB <-> YUV conversion to full-range SDTV for now.
672 */
673static const u16 csc_zero_matrix[] = {
674 0x0, 0x0, 0x0,
675 0x0, 0x0, 0x0,
676 0x0, 0x0, 0x0
677};
678
679static const u16 csc_identity_matrix[] = {
680 0x1000, 0x0, 0x0,
681 0x0, 0x1000, 0x0,
682 0x0, 0x0, 0x1000
683};
684
685static const u32 csc_zero_offsets[] = {
686 0, 0, 0
687};
688
689static const u16 csc_rgb_to_sdtv_matrix[] = {
690 0x4c9, 0x864, 0x1d3,
691 0x7d4d, 0x7ab3, 0x800,
692 0x800, 0x794d, 0x7eb3
693};
694
695static const u32 csc_rgb_to_sdtv_offsets[] = {
696 0x0, 0x8000000, 0x8000000
697};
698
699static const u16 csc_sdtv_to_rgb_matrix[] = {
700 0x1000, 0x166f, 0x0,
701 0x1000, 0x7483, 0x7a7f,
702 0x1000, 0x0, 0x1c5a
703};
704
705static const u32 csc_sdtv_to_rgb_offsets[] = {
706 0x0, 0x1800, 0x1800
707};
708
709/**
710 * zynqmp_disp_blend_set_output_format - Set the output format of the blender
711 * @blend: Blender object
712 * @format: Output format
713 *
714 * Set the output format of the blender to @format.
715 */
716static void zynqmp_disp_blend_set_output_format(struct zynqmp_disp_blend *blend,
717 enum zynqmp_dpsub_format format)
718{
719 static const unsigned int blend_output_fmts[] = {
720 [ZYNQMP_DPSUB_FORMAT_RGB] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB,
721 [ZYNQMP_DPSUB_FORMAT_YCRCB444] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR444,
722 [ZYNQMP_DPSUB_FORMAT_YCRCB422] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR422
723 | ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_EN_DOWNSAMPLE,
724 [ZYNQMP_DPSUB_FORMAT_YONLY] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YONLY,
725 };
726
727 u32 fmt = blend_output_fmts[format];
728 const u16 *coeffs;
729 const u32 *offsets;
730 unsigned int i;
731
732 zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT, fmt);
733 if (fmt == ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB) {
734 coeffs = csc_identity_matrix;
735 offsets = csc_zero_offsets;
736 } else {
737 coeffs = csc_rgb_to_sdtv_matrix;
738 offsets = csc_rgb_to_sdtv_offsets;
739 }
740
741 for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_COEFF; i++)
742 zynqmp_disp_blend_write(blend,
743 ZYNQMP_DISP_V_BLEND_RGB2YCBCR_COEFF(i),
744 coeffs[i]);
745
746 for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_OFFSET; i++)
747 zynqmp_disp_blend_write(blend,
748 ZYNQMP_DISP_V_BLEND_OUTCSC_OFFSET(i),
749 offsets[i]);
750}
751
752/**
753 * zynqmp_disp_blend_set_bg_color - Set the background color
754 * @blend: Blender object
755 * @rcr: Red/Cr color component
756 * @gy: Green/Y color component
757 * @bcb: Blue/Cb color component
758 *
759 * Set the background color to (@rcr, @gy, @bcb), corresponding to the R, G and
760 * B or Cr, Y and Cb components respectively depending on the selected output
761 * format.
762 */
763static void zynqmp_disp_blend_set_bg_color(struct zynqmp_disp_blend *blend,
764 u32 rcr, u32 gy, u32 bcb)
765{
766 zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_BG_CLR_0, rcr);
767 zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_BG_CLR_1, gy);
768 zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_BG_CLR_2, bcb);
769}
770
771/**
772 * zynqmp_disp_blend_set_global_alpha - Configure global alpha blending
773 * @blend: Blender object
774 * @enable: True to enable global alpha blending
775 * @alpha: Global alpha value (ignored if @enabled is false)
776 */
777static void zynqmp_disp_blend_set_global_alpha(struct zynqmp_disp_blend *blend,
778 bool enable, u32 alpha)
779{
780 zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA,
781 ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_VALUE(alpha) |
782 (enable ? ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_EN : 0));
783}
784
785/**
786 * zynqmp_disp_blend_layer_set_csc - Configure colorspace conversion for layer
787 * @blend: Blender object
788 * @layer: The layer
789 * @coeffs: Colorspace conversion matrix
790 * @offsets: Colorspace conversion offsets
791 *
792 * Configure the input colorspace conversion matrix and offsets for the @layer.
793 * Columns of the matrix are automatically swapped based on the input format to
794 * handle RGB and YCrCb components permutations.
795 */
796static void zynqmp_disp_blend_layer_set_csc(struct zynqmp_disp_blend *blend,
797 struct zynqmp_disp_layer *layer,
798 const u16 *coeffs,
799 const u32 *offsets)
800{
801 unsigned int swap[3] = { 0, 1, 2 };
802 unsigned int reg;
803 unsigned int i;
804
805 if (layer->disp_fmt->swap) {
806 if (layer->drm_fmt->is_yuv) {
807 /* Swap U and V. */
808 swap[1] = 2;
809 swap[2] = 1;
810 } else {
811 /* Swap R and B. */
812 swap[0] = 2;
813 swap[2] = 0;
814 }
815 }
816
817 if (layer->id == ZYNQMP_DISP_LAYER_VID)
818 reg = ZYNQMP_DISP_V_BLEND_IN1CSC_COEFF(0);
819 else
820 reg = ZYNQMP_DISP_V_BLEND_IN2CSC_COEFF(0);
821
822 for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_COEFF; i += 3, reg += 12) {
823 zynqmp_disp_blend_write(blend, reg + 0, coeffs[i + swap[0]]);
824 zynqmp_disp_blend_write(blend, reg + 4, coeffs[i + swap[1]]);
825 zynqmp_disp_blend_write(blend, reg + 8, coeffs[i + swap[2]]);
826 }
827
828 if (layer->id == ZYNQMP_DISP_LAYER_VID)
829 reg = ZYNQMP_DISP_V_BLEND_IN1CSC_OFFSET(0);
830 else
831 reg = ZYNQMP_DISP_V_BLEND_IN2CSC_OFFSET(0);
832
833 for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_OFFSET; i++)
834 zynqmp_disp_blend_write(blend, reg + i * 4, offsets[i]);
835}
836
837/**
838 * zynqmp_disp_blend_layer_enable - Enable a layer
839 * @blend: Blender object
840 * @layer: The layer
841 */
842static void zynqmp_disp_blend_layer_enable(struct zynqmp_disp_blend *blend,
843 struct zynqmp_disp_layer *layer)
844{
845 const u16 *coeffs;
846 const u32 *offsets;
847 u32 val;
848
849 val = (layer->drm_fmt->is_yuv ?
850 0 : ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_RGB) |
851 (layer->drm_fmt->hsub > 1 ?
852 ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_EN_US : 0);
853
854 zynqmp_disp_blend_write(blend,
855 ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
856 val);
857
858 if (layer->drm_fmt->is_yuv) {
859 coeffs = csc_sdtv_to_rgb_matrix;
860 offsets = csc_sdtv_to_rgb_offsets;
861 } else {
862 coeffs = csc_identity_matrix;
863 offsets = csc_zero_offsets;
864 }
865
866 zynqmp_disp_blend_layer_set_csc(blend, layer, coeffs, offsets);
867}
868
869/**
870 * zynqmp_disp_blend_layer_disable - Disable a layer
871 * @blend: Blender object
872 * @layer: The layer
873 */
874static void zynqmp_disp_blend_layer_disable(struct zynqmp_disp_blend *blend,
875 struct zynqmp_disp_layer *layer)
876{
877 zynqmp_disp_blend_write(blend,
878 ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
879 0);
880
881 zynqmp_disp_blend_layer_set_csc(blend, layer, csc_zero_matrix,
882 csc_zero_offsets);
883}
884
885/* -----------------------------------------------------------------------------
886 * Audio Mixer
887 */
888
889static void zynqmp_disp_audio_write(struct zynqmp_disp_audio *audio,
890 int reg, u32 val)
891{
892 writel(val, audio->base + reg);
893}
894
895/**
896 * zynqmp_disp_audio_enable - Enable the audio mixer
897 * @audio: Audio mixer
898 *
899 * Enable the audio mixer by de-asserting the soft reset. The audio state is set to
900 * default values by the reset, set the default mixer volume explicitly.
901 */
902static void zynqmp_disp_audio_enable(struct zynqmp_disp_audio *audio)
903{
904 /* Clear the audio soft reset register as it's an non-reset flop. */
905 zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_SOFT_RESET, 0);
906 zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_MIXER_VOLUME,
907 ZYNQMP_DISP_AUD_MIXER_VOLUME_NO_SCALE);
908}
909
910/**
911 * zynqmp_disp_audio_disable - Disable the audio mixer
912 * @audio: Audio mixer
913 *
914 * Disable the audio mixer by asserting its soft reset.
915 */
916static void zynqmp_disp_audio_disable(struct zynqmp_disp_audio *audio)
917{
918 zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_SOFT_RESET,
919 ZYNQMP_DISP_AUD_SOFT_RESET_AUD_SRST);
920}
921
922static void zynqmp_disp_audio_init(struct device *dev,
923 struct zynqmp_disp_audio *audio)
924{
925 /* Try the live PL audio clock. */
926 audio->clk = devm_clk_get(dev, "dp_live_audio_aclk");
927 if (!IS_ERR(audio->clk)) {
928 audio->clk_from_ps = false;
929 return;
930 }
931
932 /* If the live PL audio clock is not valid, fall back to PS clock. */
933 audio->clk = devm_clk_get(dev, "dp_aud_clk");
934 if (!IS_ERR(audio->clk)) {
935 audio->clk_from_ps = true;
936 return;
937 }
938
939 dev_err(dev, "audio disabled due to missing clock\n");
940}
941
942/* -----------------------------------------------------------------------------
943 * ZynqMP Display external functions for zynqmp_dp
944 */
945
946/**
947 * zynqmp_disp_handle_vblank - Handle the vblank event
948 * @disp: Display controller
949 *
950 * This function handles the vblank interrupt, and sends an event to
951 * CRTC object. This will be called by the DP vblank interrupt handler.
952 */
953void zynqmp_disp_handle_vblank(struct zynqmp_disp *disp)
954{
955 struct drm_crtc *crtc = &disp->crtc;
956
957 drm_crtc_handle_vblank(crtc);
958}
959
960/**
961 * zynqmp_disp_audio_enabled - If the audio is enabled
962 * @disp: Display controller
963 *
964 * Return if the audio is enabled depending on the audio clock.
965 *
966 * Return: true if audio is enabled, or false.
967 */
968bool zynqmp_disp_audio_enabled(struct zynqmp_disp *disp)
969{
970 return !!disp->audio.clk;
971}
972
973/**
974 * zynqmp_disp_get_audio_clk_rate - Get the current audio clock rate
975 * @disp: Display controller
976 *
977 * Return: the current audio clock rate.
978 */
979unsigned int zynqmp_disp_get_audio_clk_rate(struct zynqmp_disp *disp)
980{
981 if (zynqmp_disp_audio_enabled(disp))
982 return 0;
983 return clk_get_rate(disp->audio.clk);
984}
985
986/**
987 * zynqmp_disp_get_crtc_mask - Return the CRTC bit mask
988 * @disp: Display controller
989 *
990 * Return: the crtc mask of the zyqnmp_disp CRTC.
991 */
992uint32_t zynqmp_disp_get_crtc_mask(struct zynqmp_disp *disp)
993{
994 return drm_crtc_mask(&disp->crtc);
995}
996
997/* -----------------------------------------------------------------------------
998 * ZynqMP Display Layer & DRM Plane
999 */
1000
1001/**
1002 * zynqmp_disp_layer_find_format - Find format information for a DRM format
1003 * @layer: The layer
1004 * @drm_fmt: DRM format to search
1005 *
1006 * Search display subsystem format information corresponding to the given DRM
1007 * format @drm_fmt for the @layer, and return a pointer to the format
1008 * descriptor.
1009 *
1010 * Return: A pointer to the format descriptor if found, NULL otherwise
1011 */
1012static const struct zynqmp_disp_format *
1013zynqmp_disp_layer_find_format(struct zynqmp_disp_layer *layer,
1014 u32 drm_fmt)
1015{
1016 unsigned int i;
1017
1018 for (i = 0; i < layer->info->num_formats; i++) {
1019 if (layer->info->formats[i].drm_fmt == drm_fmt)
1020 return &layer->info->formats[i];
1021 }
1022
1023 return NULL;
1024}
1025
1026/**
1027 * zynqmp_disp_layer_enable - Enable a layer
1028 * @layer: The layer
1029 *
1030 * Enable the @layer in the audio/video buffer manager and the blender. DMA
1031 * channels are started separately by zynqmp_disp_layer_update().
1032 */
1033static void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer)
1034{
1035 zynqmp_disp_avbuf_enable_video(&layer->disp->avbuf, layer->id,
1036 ZYNQMP_DISP_LAYER_NONLIVE);
1037 zynqmp_disp_blend_layer_enable(&layer->disp->blend, layer);
1038
1039 layer->mode = ZYNQMP_DISP_LAYER_NONLIVE;
1040}
1041
1042/**
1043 * zynqmp_disp_layer_disable - Disable the layer
1044 * @layer: The layer
1045 *
1046 * Disable the layer by stopping its DMA channels and disabling it in the
1047 * audio/video buffer manager and the blender.
1048 */
1049static void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer)
1050{
1051 unsigned int i;
1052
1053 for (i = 0; i < layer->drm_fmt->num_planes; i++)
1054 dmaengine_terminate_sync(layer->dmas[i].chan);
1055
1056 zynqmp_disp_avbuf_disable_video(&layer->disp->avbuf, layer->id);
1057 zynqmp_disp_blend_layer_disable(&layer->disp->blend, layer);
1058}
1059
1060/**
1061 * zynqmp_disp_layer_set_format - Set the layer format
1062 * @layer: The layer
1063 * @state: The plane state
1064 *
1065 * Set the format for @layer based on @state->fb->format. The layer must be
1066 * disabled.
1067 */
1068static void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
1069 struct drm_plane_state *state)
1070{
1071 const struct drm_format_info *info = state->fb->format;
1072 unsigned int i;
1073
1074 layer->disp_fmt = zynqmp_disp_layer_find_format(layer, info->format);
1075 layer->drm_fmt = info;
1076
1077 zynqmp_disp_avbuf_set_format(&layer->disp->avbuf, layer->id,
1078 layer->disp_fmt);
1079
1080 /*
1081 * Set slave_id for each DMA channel to indicate they're part of a
1082 * video group.
1083 */
1084 for (i = 0; i < info->num_planes; i++) {
1085 struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
1086 struct dma_slave_config config = {
1087 .direction = DMA_MEM_TO_DEV,
1088 .slave_id = 1,
1089 };
1090
1091 dmaengine_slave_config(dma->chan, &config);
1092 }
1093}
1094
1095/**
1096 * zynqmp_disp_layer_update - Update the layer framebuffer
1097 * @layer: The layer
1098 * @state: The plane state
1099 *
1100 * Update the framebuffer for the layer by issuing a new DMA engine transaction
1101 * for the new framebuffer.
1102 *
1103 * Return: 0 on success, or the DMA descriptor failure error otherwise
1104 */
1105static int zynqmp_disp_layer_update(struct zynqmp_disp_layer *layer,
1106 struct drm_plane_state *state)
1107{
1108 const struct drm_format_info *info = layer->drm_fmt;
1109 unsigned int i;
1110
1111 for (i = 0; i < layer->drm_fmt->num_planes; i++) {
1112 unsigned int width = state->crtc_w / (i ? info->hsub : 1);
1113 unsigned int height = state->crtc_h / (i ? info->vsub : 1);
1114 struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
1115 struct dma_async_tx_descriptor *desc;
1116 dma_addr_t paddr;
1117
1118 paddr = drm_fb_cma_get_gem_addr(state->fb, state, i);
1119
1120 dma->xt.numf = height;
1121 dma->sgl.size = width * info->cpp[i];
1122 dma->sgl.icg = state->fb->pitches[i] - dma->sgl.size;
1123 dma->xt.src_start = paddr;
1124 dma->xt.frame_size = 1;
1125 dma->xt.dir = DMA_MEM_TO_DEV;
1126 dma->xt.src_sgl = true;
1127 dma->xt.dst_sgl = false;
1128
1129 desc = dmaengine_prep_interleaved_dma(dma->chan, &dma->xt,
1130 DMA_CTRL_ACK |
1131 DMA_PREP_REPEAT |
1132 DMA_PREP_LOAD_EOT);
1133 if (!desc) {
1134 dev_err(layer->disp->dev,
1135 "failed to prepare DMA descriptor\n");
1136 return -ENOMEM;
1137 }
1138
1139 dmaengine_submit(desc);
1140 dma_async_issue_pending(dma->chan);
1141 }
1142
1143 return 0;
1144}
1145
1146static inline struct zynqmp_disp_layer *plane_to_layer(struct drm_plane *plane)
1147{
1148 return container_of(plane, struct zynqmp_disp_layer, plane);
1149}
1150
1151static int
1152zynqmp_disp_plane_atomic_check(struct drm_plane *plane,
1153 struct drm_plane_state *state)
1154{
1155 struct drm_crtc_state *crtc_state;
1156
1157 if (!state->crtc)
1158 return 0;
1159
1160 crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
1161 if (IS_ERR(crtc_state))
1162 return PTR_ERR(crtc_state);
1163
1164 return drm_atomic_helper_check_plane_state(state, crtc_state,
1165 DRM_PLANE_HELPER_NO_SCALING,
1166 DRM_PLANE_HELPER_NO_SCALING,
1167 false, false);
1168}
1169
1170static void
1171zynqmp_disp_plane_atomic_disable(struct drm_plane *plane,
1172 struct drm_plane_state *old_state)
1173{
1174 struct zynqmp_disp_layer *layer = plane_to_layer(plane);
1175
1176 if (!old_state->fb)
1177 return;
1178
1179 zynqmp_disp_layer_disable(layer);
1180}
1181
1182static void
1183zynqmp_disp_plane_atomic_update(struct drm_plane *plane,
1184 struct drm_plane_state *old_state)
1185{
1186 struct zynqmp_disp_layer *layer = plane_to_layer(plane);
1187 bool format_changed = false;
1188
1189 if (!old_state->fb ||
1190 old_state->fb->format->format != plane->state->fb->format->format)
1191 format_changed = true;
1192
1193 /*
1194 * If the format has changed (including going from a previously
1195 * disabled state to any format), reconfigure the format. Disable the
1196 * plane first if needed.
1197 */
1198 if (format_changed) {
1199 if (old_state->fb)
1200 zynqmp_disp_layer_disable(layer);
1201
1202 zynqmp_disp_layer_set_format(layer, plane->state);
1203 }
1204
1205 zynqmp_disp_layer_update(layer, plane->state);
1206
1207 /* Enable or re-enable the plane is the format has changed. */
1208 if (format_changed)
1209 zynqmp_disp_layer_enable(layer);
1210}
1211
1212static const struct drm_plane_helper_funcs zynqmp_disp_plane_helper_funcs = {
1213 .atomic_check = zynqmp_disp_plane_atomic_check,
1214 .atomic_update = zynqmp_disp_plane_atomic_update,
1215 .atomic_disable = zynqmp_disp_plane_atomic_disable,
1216};
1217
1218static const struct drm_plane_funcs zynqmp_disp_plane_funcs = {
1219 .update_plane = drm_atomic_helper_update_plane,
1220 .disable_plane = drm_atomic_helper_disable_plane,
1221 .destroy = drm_plane_cleanup,
1222 .reset = drm_atomic_helper_plane_reset,
1223 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
1224 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
1225};
1226
1227static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
1228{
1229 unsigned int i, j;
1230 int ret;
1231
1232 for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++) {
1233 struct zynqmp_disp_layer *layer = &disp->layers[i];
1234 enum drm_plane_type type;
1235 u32 *drm_formats;
1236
1237 drm_formats = drmm_kcalloc(disp->drm, sizeof(*drm_formats),
1238 layer->info->num_formats,
1239 GFP_KERNEL);
1240 if (!drm_formats)
1241 return -ENOMEM;
1242
1243 for (j = 0; j < layer->info->num_formats; ++j)
1244 drm_formats[j] = layer->info->formats[j].drm_fmt;
1245
1246 /* Graphics layer is primary, and video layer is overlay. */
1247 type = i == ZYNQMP_DISP_LAYER_GFX
1248 ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1249 ret = drm_universal_plane_init(disp->drm, &layer->plane, 0,
1250 &zynqmp_disp_plane_funcs,
1251 drm_formats,
1252 layer->info->num_formats,
1253 NULL, type, NULL);
1254 if (ret)
1255 return ret;
1256
1257 drm_plane_helper_add(&layer->plane,
1258 &zynqmp_disp_plane_helper_funcs);
1259 }
1260
1261 return 0;
1262}
1263
1264/**
1265 * zynqmp_disp_layer_release_dma - Release DMA channels for a layer
1266 * @disp: Display controller
1267 * @layer: The layer
1268 *
1269 * Release the DMA channels associated with @layer.
1270 */
1271static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
1272 struct zynqmp_disp_layer *layer)
1273{
1274 unsigned int i;
1275
1276 if (!layer->info)
1277 return;
1278
1279 for (i = 0; i < layer->info->num_channels; i++) {
1280 struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
1281
1282 if (!dma->chan)
1283 continue;
1284
1285 /* Make sure the channel is terminated before release. */
1286 dmaengine_terminate_sync(dma->chan);
1287 dma_release_channel(dma->chan);
1288 }
1289}
1290
1291/**
1292 * zynqmp_disp_destroy_layers - Destroy all layers
1293 * @disp: Display controller
1294 */
1295static void zynqmp_disp_destroy_layers(struct zynqmp_disp *disp)
1296{
1297 unsigned int i;
1298
1299 for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++)
1300 zynqmp_disp_layer_release_dma(disp, &disp->layers[i]);
1301}
1302
1303/**
1304 * zynqmp_disp_layer_request_dma - Request DMA channels for a layer
1305 * @disp: Display controller
1306 * @layer: The layer
1307 *
1308 * Request all DMA engine channels needed by @layer.
1309 *
1310 * Return: 0 on success, or the DMA channel request error otherwise
1311 */
1312static int zynqmp_disp_layer_request_dma(struct zynqmp_disp *disp,
1313 struct zynqmp_disp_layer *layer)
1314{
1315 static const char * const dma_names[] = { "vid", "gfx" };
1316 unsigned int i;
1317 int ret;
1318
1319 for (i = 0; i < layer->info->num_channels; i++) {
1320 struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
1321 char dma_channel_name[16];
1322
1323 snprintf(dma_channel_name, sizeof(dma_channel_name),
1324 "%s%u", dma_names[layer->id], i);
1325 dma->chan = of_dma_request_slave_channel(disp->dev->of_node,
1326 dma_channel_name);
1327 if (IS_ERR(dma->chan)) {
1328 dev_err(disp->dev, "failed to request dma channel\n");
1329 ret = PTR_ERR(dma->chan);
1330 dma->chan = NULL;
1331 return ret;
1332 }
1333 }
1334
1335 return 0;
1336}
1337
1338/**
1339 * zynqmp_disp_create_layers - Create and initialize all layers
1340 * @disp: Display controller
1341 *
1342 * Return: 0 on success, or the DMA channel request error otherwise
1343 */
1344static int zynqmp_disp_create_layers(struct zynqmp_disp *disp)
1345{
1346 static const struct zynqmp_disp_layer_info layer_info[] = {
1347 [ZYNQMP_DISP_LAYER_VID] = {
1348 .formats = avbuf_vid_fmts,
1349 .num_formats = ARRAY_SIZE(avbuf_vid_fmts),
1350 .num_channels = 3,
1351 },
1352 [ZYNQMP_DISP_LAYER_GFX] = {
1353 .formats = avbuf_gfx_fmts,
1354 .num_formats = ARRAY_SIZE(avbuf_gfx_fmts),
1355 .num_channels = 1,
1356 },
1357 };
1358
1359 unsigned int i;
1360 int ret;
1361
1362 for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++) {
1363 struct zynqmp_disp_layer *layer = &disp->layers[i];
1364
1365 layer->id = i;
1366 layer->disp = disp;
1367 layer->info = &layer_info[i];
1368
1369 ret = zynqmp_disp_layer_request_dma(disp, layer);
1370 if (ret)
1371 goto err;
1372 }
1373
1374 return 0;
1375
1376err:
1377 zynqmp_disp_destroy_layers(disp);
1378 return ret;
1379}
1380
1381/* -----------------------------------------------------------------------------
1382 * ZynqMP Display & DRM CRTC
1383 */
1384
1385/**
1386 * zynqmp_disp_enable - Enable the display controller
1387 * @disp: Display controller
1388 */
1389static void zynqmp_disp_enable(struct zynqmp_disp *disp)
1390{
1391 zynqmp_disp_avbuf_enable(&disp->avbuf);
1392 /* Choose clock source based on the DT clock handle. */
1393 zynqmp_disp_avbuf_set_clocks_sources(&disp->avbuf, disp->pclk_from_ps,
1394 disp->audio.clk_from_ps, true);
1395 zynqmp_disp_avbuf_enable_channels(&disp->avbuf);
1396 zynqmp_disp_avbuf_enable_audio(&disp->avbuf);
1397
1398 zynqmp_disp_audio_enable(&disp->audio);
1399}
1400
1401/**
1402 * zynqmp_disp_disable - Disable the display controller
1403 * @disp: Display controller
1404 */
1405static void zynqmp_disp_disable(struct zynqmp_disp *disp)
1406{
1407 struct drm_crtc *crtc = &disp->crtc;
1408
1409 zynqmp_disp_audio_disable(&disp->audio);
1410
1411 zynqmp_disp_avbuf_disable_audio(&disp->avbuf);
1412 zynqmp_disp_avbuf_disable_channels(&disp->avbuf);
1413 zynqmp_disp_avbuf_disable(&disp->avbuf);
1414
1415 /* Mark the flip is done as crtc is disabled anyway */
1416 if (crtc->state->event) {
1417 complete_all(crtc->state->event->base.completion);
1418 crtc->state->event = NULL;
1419 }
1420}
1421
1422static inline struct zynqmp_disp *crtc_to_disp(struct drm_crtc *crtc)
1423{
1424 return container_of(crtc, struct zynqmp_disp, crtc);
1425}
1426
1427static int zynqmp_disp_crtc_setup_clock(struct drm_crtc *crtc,
1428 struct drm_display_mode *adjusted_mode)
1429{
1430 struct zynqmp_disp *disp = crtc_to_disp(crtc);
1431 unsigned long mode_clock = adjusted_mode->clock * 1000;
1432 unsigned long rate;
1433 long diff;
1434 int ret;
1435
1436 ret = clk_set_rate(disp->pclk, mode_clock);
1437 if (ret) {
1438 dev_err(disp->dev, "failed to set a pixel clock\n");
1439 return ret;
1440 }
1441
1442 rate = clk_get_rate(disp->pclk);
1443 diff = rate - mode_clock;
1444 if (abs(diff) > mode_clock / 20)
1445 dev_info(disp->dev,
1446 "requested pixel rate: %lu actual rate: %lu\n",
1447 mode_clock, rate);
1448 else
1449 dev_dbg(disp->dev,
1450 "requested pixel rate: %lu actual rate: %lu\n",
1451 mode_clock, rate);
1452
1453 return 0;
1454}
1455
1456static void
1457zynqmp_disp_crtc_atomic_enable(struct drm_crtc *crtc,
1458 struct drm_crtc_state *old_crtc_state)
1459{
1460 struct zynqmp_disp *disp = crtc_to_disp(crtc);
1461 struct drm_display_mode *adjusted_mode = &crtc->state->adjusted_mode;
1462 int ret, vrefresh;
1463
1464 zynqmp_disp_crtc_setup_clock(crtc, adjusted_mode);
1465
1466 pm_runtime_get_sync(disp->dev);
1467 ret = clk_prepare_enable(disp->pclk);
1468 if (ret) {
1469 dev_err(disp->dev, "failed to enable a pixel clock\n");
1470 pm_runtime_put_sync(disp->dev);
1471 return;
1472 }
1473
1474 zynqmp_disp_blend_set_output_format(&disp->blend,
1475 ZYNQMP_DPSUB_FORMAT_RGB);
1476 zynqmp_disp_blend_set_bg_color(&disp->blend, 0, 0, 0);
1477 zynqmp_disp_blend_set_global_alpha(&disp->blend, false, 0);
1478
1479 zynqmp_disp_enable(disp);
1480
1481 /* Delay of 3 vblank intervals for timing gen to be stable */
1482 vrefresh = (adjusted_mode->clock * 1000) /
1483 (adjusted_mode->vtotal * adjusted_mode->htotal);
1484 msleep(3 * 1000 / vrefresh);
1485}
1486
1487static void
1488zynqmp_disp_crtc_atomic_disable(struct drm_crtc *crtc,
1489 struct drm_crtc_state *old_crtc_state)
1490{
1491 struct zynqmp_disp *disp = crtc_to_disp(crtc);
1492 struct drm_plane_state *old_plane_state;
1493
1494 /*
1495 * Disable the plane if active. The old plane state can be NULL in the
1496 * .shutdown() path if the plane is already disabled, skip
1497 * zynqmp_disp_plane_atomic_disable() in that case.
1498 */
1499 old_plane_state = drm_atomic_get_old_plane_state(old_crtc_state->state,
1500 crtc->primary);
1501 if (old_plane_state)
1502 zynqmp_disp_plane_atomic_disable(crtc->primary, old_plane_state);
1503
1504 zynqmp_disp_disable(disp);
1505
1506 drm_crtc_vblank_off(&disp->crtc);
1507
1508 clk_disable_unprepare(disp->pclk);
1509 pm_runtime_put_sync(disp->dev);
1510}
1511
1512static int zynqmp_disp_crtc_atomic_check(struct drm_crtc *crtc,
1513 struct drm_crtc_state *state)
1514{
1515 return drm_atomic_add_affected_planes(state->state, crtc);
1516}
1517
1518static void
1519zynqmp_disp_crtc_atomic_begin(struct drm_crtc *crtc,
1520 struct drm_crtc_state *old_crtc_state)
1521{
1522 drm_crtc_vblank_on(crtc);
1523}
1524
1525static void
1526zynqmp_disp_crtc_atomic_flush(struct drm_crtc *crtc,
1527 struct drm_crtc_state *old_crtc_state)
1528{
1529 if (crtc->state->event) {
1530 struct drm_pending_vblank_event *event;
1531
1532 /* Consume the flip_done event from atomic helper. */
1533 event = crtc->state->event;
1534 crtc->state->event = NULL;
1535
1536 event->pipe = drm_crtc_index(crtc);
1537
1538 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
1539
1540 spin_lock_irq(&crtc->dev->event_lock);
1541 drm_crtc_arm_vblank_event(crtc, event);
1542 spin_unlock_irq(&crtc->dev->event_lock);
1543 }
1544}
1545
1546static const struct drm_crtc_helper_funcs zynqmp_disp_crtc_helper_funcs = {
1547 .atomic_enable = zynqmp_disp_crtc_atomic_enable,
1548 .atomic_disable = zynqmp_disp_crtc_atomic_disable,
1549 .atomic_check = zynqmp_disp_crtc_atomic_check,
1550 .atomic_begin = zynqmp_disp_crtc_atomic_begin,
1551 .atomic_flush = zynqmp_disp_crtc_atomic_flush,
1552};
1553
1554static int zynqmp_disp_crtc_enable_vblank(struct drm_crtc *crtc)
1555{
1556 struct zynqmp_disp *disp = crtc_to_disp(crtc);
1557
1558 zynqmp_dp_enable_vblank(disp->dpsub->dp);
1559
1560 return 0;
1561}
1562
1563static void zynqmp_disp_crtc_disable_vblank(struct drm_crtc *crtc)
1564{
1565 struct zynqmp_disp *disp = crtc_to_disp(crtc);
1566
1567 zynqmp_dp_disable_vblank(disp->dpsub->dp);
1568}
1569
1570static const struct drm_crtc_funcs zynqmp_disp_crtc_funcs = {
1571 .destroy = drm_crtc_cleanup,
1572 .set_config = drm_atomic_helper_set_config,
1573 .page_flip = drm_atomic_helper_page_flip,
1574 .reset = drm_atomic_helper_crtc_reset,
1575 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
1576 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
1577 .enable_vblank = zynqmp_disp_crtc_enable_vblank,
1578 .disable_vblank = zynqmp_disp_crtc_disable_vblank,
1579};
1580
1581static int zynqmp_disp_create_crtc(struct zynqmp_disp *disp)
1582{
1583 struct drm_plane *plane = &disp->layers[ZYNQMP_DISP_LAYER_GFX].plane;
1584 int ret;
1585
1586 ret = drm_crtc_init_with_planes(disp->drm, &disp->crtc, plane,
1587 NULL, &zynqmp_disp_crtc_funcs, NULL);
1588 if (ret < 0)
1589 return ret;
1590
1591 drm_crtc_helper_add(&disp->crtc, &zynqmp_disp_crtc_helper_funcs);
1592
1593 /* Start with vertical blanking interrupt reporting disabled. */
1594 drm_crtc_vblank_off(&disp->crtc);
1595
1596 return 0;
1597}
1598
1599static void zynqmp_disp_map_crtc_to_plane(struct zynqmp_disp *disp)
1600{
1601 u32 possible_crtcs = drm_crtc_mask(&disp->crtc);
1602 unsigned int i;
1603
1604 for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++)
1605 disp->layers[i].plane.possible_crtcs = possible_crtcs;
1606}
1607
1608/* -----------------------------------------------------------------------------
1609 * Initialization & Cleanup
1610 */
1611
1612int zynqmp_disp_drm_init(struct zynqmp_dpsub *dpsub)
1613{
1614 struct zynqmp_disp *disp = dpsub->disp;
1615 int ret;
1616
1617 ret = zynqmp_disp_create_planes(disp);
1618 if (ret)
1619 return ret;
1620
1621 ret = zynqmp_disp_create_crtc(disp);
1622 if (ret < 0)
1623 return ret;
1624
1625 zynqmp_disp_map_crtc_to_plane(disp);
1626
1627 return 0;
1628}
1629
1630int zynqmp_disp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm)
1631{
1632 struct platform_device *pdev = to_platform_device(dpsub->dev);
1633 struct zynqmp_disp *disp;
1634 struct zynqmp_disp_layer *layer;
1635 struct resource *res;
1636 int ret;
1637
1638 disp = drmm_kzalloc(drm, sizeof(*disp), GFP_KERNEL);
1639 if (!disp)
1640 return -ENOMEM;
1641
1642 disp->dev = &pdev->dev;
1643 disp->dpsub = dpsub;
1644 disp->drm = drm;
1645
1646 dpsub->disp = disp;
1647
1648 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "blend");
1649 disp->blend.base = devm_ioremap_resource(disp->dev, res);
1650 if (IS_ERR(disp->blend.base))
1651 return PTR_ERR(disp->blend.base);
1652
1653 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "av_buf");
1654 disp->avbuf.base = devm_ioremap_resource(disp->dev, res);
1655 if (IS_ERR(disp->avbuf.base))
1656 return PTR_ERR(disp->avbuf.base);
1657
1658 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aud");
1659 disp->audio.base = devm_ioremap_resource(disp->dev, res);
1660 if (IS_ERR(disp->audio.base))
1661 return PTR_ERR(disp->audio.base);
1662
1663 /* Try the live PL video clock */
1664 disp->pclk = devm_clk_get(disp->dev, "dp_live_video_in_clk");
1665 if (!IS_ERR(disp->pclk))
1666 disp->pclk_from_ps = false;
1667 else if (PTR_ERR(disp->pclk) == -EPROBE_DEFER)
1668 return PTR_ERR(disp->pclk);
1669
1670 /* If the live PL video clock is not valid, fall back to PS clock */
1671 if (IS_ERR_OR_NULL(disp->pclk)) {
1672 disp->pclk = devm_clk_get(disp->dev, "dp_vtc_pixel_clk_in");
1673 if (IS_ERR(disp->pclk)) {
1674 dev_err(disp->dev, "failed to init any video clock\n");
1675 return PTR_ERR(disp->pclk);
1676 }
1677 disp->pclk_from_ps = true;
1678 }
1679
1680 zynqmp_disp_audio_init(disp->dev, &disp->audio);
1681
1682 ret = zynqmp_disp_create_layers(disp);
1683 if (ret)
1684 return ret;
1685
1686 layer = &disp->layers[ZYNQMP_DISP_LAYER_VID];
1687 dpsub->dma_align = 1 << layer->dmas[0].chan->device->copy_align;
1688
1689 return 0;
1690}
1691
1692void zynqmp_disp_remove(struct zynqmp_dpsub *dpsub)
1693{
1694 struct zynqmp_disp *disp = dpsub->disp;
1695
1696 zynqmp_disp_destroy_layers(disp);
1697}