Linux 4.16.11
[linux/fpc-iii.git] / drivers / media / platform / vsp1 / vsp1_bru.c
blobe8fd2ae3b3ebd28278e831299acde0269d7a02a9
1 /*
2 * vsp1_bru.c -- R-Car VSP1 Blend ROP Unit
4 * Copyright (C) 2013 Renesas Corporation
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/device.h>
15 #include <linux/gfp.h>
17 #include <media/v4l2-subdev.h>
19 #include "vsp1.h"
20 #include "vsp1_bru.h"
21 #include "vsp1_dl.h"
22 #include "vsp1_pipe.h"
23 #include "vsp1_rwpf.h"
24 #include "vsp1_video.h"
26 #define BRU_MIN_SIZE 1U
27 #define BRU_MAX_SIZE 8190U
29 /* -----------------------------------------------------------------------------
30 * Device Access
33 static inline void vsp1_bru_write(struct vsp1_bru *bru, struct vsp1_dl_list *dl,
34 u32 reg, u32 data)
36 vsp1_dl_list_write(dl, bru->base + reg, data);
39 /* -----------------------------------------------------------------------------
40 * Controls
43 static int bru_s_ctrl(struct v4l2_ctrl *ctrl)
45 struct vsp1_bru *bru =
46 container_of(ctrl->handler, struct vsp1_bru, ctrls);
48 switch (ctrl->id) {
49 case V4L2_CID_BG_COLOR:
50 bru->bgcolor = ctrl->val;
51 break;
54 return 0;
57 static const struct v4l2_ctrl_ops bru_ctrl_ops = {
58 .s_ctrl = bru_s_ctrl,
61 /* -----------------------------------------------------------------------------
62 * V4L2 Subdevice Operations
66 * The BRU can't perform format conversion, all sink and source formats must be
67 * identical. We pick the format on the first sink pad (pad 0) and propagate it
68 * to all other pads.
71 static int bru_enum_mbus_code(struct v4l2_subdev *subdev,
72 struct v4l2_subdev_pad_config *cfg,
73 struct v4l2_subdev_mbus_code_enum *code)
75 static const unsigned int codes[] = {
76 MEDIA_BUS_FMT_ARGB8888_1X32,
77 MEDIA_BUS_FMT_AYUV8_1X32,
80 return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
81 ARRAY_SIZE(codes));
84 static int bru_enum_frame_size(struct v4l2_subdev *subdev,
85 struct v4l2_subdev_pad_config *cfg,
86 struct v4l2_subdev_frame_size_enum *fse)
88 if (fse->index)
89 return -EINVAL;
91 if (fse->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
92 fse->code != MEDIA_BUS_FMT_AYUV8_1X32)
93 return -EINVAL;
95 fse->min_width = BRU_MIN_SIZE;
96 fse->max_width = BRU_MAX_SIZE;
97 fse->min_height = BRU_MIN_SIZE;
98 fse->max_height = BRU_MAX_SIZE;
100 return 0;
103 static struct v4l2_rect *bru_get_compose(struct vsp1_bru *bru,
104 struct v4l2_subdev_pad_config *cfg,
105 unsigned int pad)
107 return v4l2_subdev_get_try_compose(&bru->entity.subdev, cfg, pad);
110 static void bru_try_format(struct vsp1_bru *bru,
111 struct v4l2_subdev_pad_config *config,
112 unsigned int pad, struct v4l2_mbus_framefmt *fmt)
114 struct v4l2_mbus_framefmt *format;
116 switch (pad) {
117 case BRU_PAD_SINK(0):
118 /* Default to YUV if the requested format is not supported. */
119 if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
120 fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
121 fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
122 break;
124 default:
125 /* The BRU can't perform format conversion. */
126 format = vsp1_entity_get_pad_format(&bru->entity, config,
127 BRU_PAD_SINK(0));
128 fmt->code = format->code;
129 break;
132 fmt->width = clamp(fmt->width, BRU_MIN_SIZE, BRU_MAX_SIZE);
133 fmt->height = clamp(fmt->height, BRU_MIN_SIZE, BRU_MAX_SIZE);
134 fmt->field = V4L2_FIELD_NONE;
135 fmt->colorspace = V4L2_COLORSPACE_SRGB;
138 static int bru_set_format(struct v4l2_subdev *subdev,
139 struct v4l2_subdev_pad_config *cfg,
140 struct v4l2_subdev_format *fmt)
142 struct vsp1_bru *bru = to_bru(subdev);
143 struct v4l2_subdev_pad_config *config;
144 struct v4l2_mbus_framefmt *format;
145 int ret = 0;
147 mutex_lock(&bru->entity.lock);
149 config = vsp1_entity_get_pad_config(&bru->entity, cfg, fmt->which);
150 if (!config) {
151 ret = -EINVAL;
152 goto done;
155 bru_try_format(bru, config, fmt->pad, &fmt->format);
157 format = vsp1_entity_get_pad_format(&bru->entity, config, fmt->pad);
158 *format = fmt->format;
160 /* Reset the compose rectangle */
161 if (fmt->pad != bru->entity.source_pad) {
162 struct v4l2_rect *compose;
164 compose = bru_get_compose(bru, config, fmt->pad);
165 compose->left = 0;
166 compose->top = 0;
167 compose->width = format->width;
168 compose->height = format->height;
171 /* Propagate the format code to all pads */
172 if (fmt->pad == BRU_PAD_SINK(0)) {
173 unsigned int i;
175 for (i = 0; i <= bru->entity.source_pad; ++i) {
176 format = vsp1_entity_get_pad_format(&bru->entity,
177 config, i);
178 format->code = fmt->format.code;
182 done:
183 mutex_unlock(&bru->entity.lock);
184 return ret;
187 static int bru_get_selection(struct v4l2_subdev *subdev,
188 struct v4l2_subdev_pad_config *cfg,
189 struct v4l2_subdev_selection *sel)
191 struct vsp1_bru *bru = to_bru(subdev);
192 struct v4l2_subdev_pad_config *config;
194 if (sel->pad == bru->entity.source_pad)
195 return -EINVAL;
197 switch (sel->target) {
198 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
199 sel->r.left = 0;
200 sel->r.top = 0;
201 sel->r.width = BRU_MAX_SIZE;
202 sel->r.height = BRU_MAX_SIZE;
203 return 0;
205 case V4L2_SEL_TGT_COMPOSE:
206 config = vsp1_entity_get_pad_config(&bru->entity, cfg,
207 sel->which);
208 if (!config)
209 return -EINVAL;
211 mutex_lock(&bru->entity.lock);
212 sel->r = *bru_get_compose(bru, config, sel->pad);
213 mutex_unlock(&bru->entity.lock);
214 return 0;
216 default:
217 return -EINVAL;
221 static int bru_set_selection(struct v4l2_subdev *subdev,
222 struct v4l2_subdev_pad_config *cfg,
223 struct v4l2_subdev_selection *sel)
225 struct vsp1_bru *bru = to_bru(subdev);
226 struct v4l2_subdev_pad_config *config;
227 struct v4l2_mbus_framefmt *format;
228 struct v4l2_rect *compose;
229 int ret = 0;
231 if (sel->pad == bru->entity.source_pad)
232 return -EINVAL;
234 if (sel->target != V4L2_SEL_TGT_COMPOSE)
235 return -EINVAL;
237 mutex_lock(&bru->entity.lock);
239 config = vsp1_entity_get_pad_config(&bru->entity, cfg, sel->which);
240 if (!config) {
241 ret = -EINVAL;
242 goto done;
246 * The compose rectangle top left corner must be inside the output
247 * frame.
249 format = vsp1_entity_get_pad_format(&bru->entity, config,
250 bru->entity.source_pad);
251 sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);
252 sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
255 * Scaling isn't supported, the compose rectangle size must be identical
256 * to the sink format size.
258 format = vsp1_entity_get_pad_format(&bru->entity, config, sel->pad);
259 sel->r.width = format->width;
260 sel->r.height = format->height;
262 compose = bru_get_compose(bru, config, sel->pad);
263 *compose = sel->r;
265 done:
266 mutex_unlock(&bru->entity.lock);
267 return ret;
270 static const struct v4l2_subdev_pad_ops bru_pad_ops = {
271 .init_cfg = vsp1_entity_init_cfg,
272 .enum_mbus_code = bru_enum_mbus_code,
273 .enum_frame_size = bru_enum_frame_size,
274 .get_fmt = vsp1_subdev_get_pad_format,
275 .set_fmt = bru_set_format,
276 .get_selection = bru_get_selection,
277 .set_selection = bru_set_selection,
280 static const struct v4l2_subdev_ops bru_ops = {
281 .pad = &bru_pad_ops,
284 /* -----------------------------------------------------------------------------
285 * VSP1 Entity Operations
288 static void bru_configure(struct vsp1_entity *entity,
289 struct vsp1_pipeline *pipe,
290 struct vsp1_dl_list *dl,
291 enum vsp1_entity_params params)
293 struct vsp1_bru *bru = to_bru(&entity->subdev);
294 struct v4l2_mbus_framefmt *format;
295 unsigned int flags;
296 unsigned int i;
298 if (params != VSP1_ENTITY_PARAMS_INIT)
299 return;
301 format = vsp1_entity_get_pad_format(&bru->entity, bru->entity.config,
302 bru->entity.source_pad);
305 * The hardware is extremely flexible but we have no userspace API to
306 * expose all the parameters, nor is it clear whether we would have use
307 * cases for all the supported modes. Let's just harcode the parameters
308 * to sane default values for now.
312 * Disable dithering and enable color data normalization unless the
313 * format at the pipeline output is premultiplied.
315 flags = pipe->output ? pipe->output->format.flags : 0;
316 vsp1_bru_write(bru, dl, VI6_BRU_INCTRL,
317 flags & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA ?
318 0 : VI6_BRU_INCTRL_NRM);
321 * Set the background position to cover the whole output image and
322 * configure its color.
324 vsp1_bru_write(bru, dl, VI6_BRU_VIRRPF_SIZE,
325 (format->width << VI6_BRU_VIRRPF_SIZE_HSIZE_SHIFT) |
326 (format->height << VI6_BRU_VIRRPF_SIZE_VSIZE_SHIFT));
327 vsp1_bru_write(bru, dl, VI6_BRU_VIRRPF_LOC, 0);
329 vsp1_bru_write(bru, dl, VI6_BRU_VIRRPF_COL, bru->bgcolor |
330 (0xff << VI6_BRU_VIRRPF_COL_A_SHIFT));
333 * Route BRU input 1 as SRC input to the ROP unit and configure the ROP
334 * unit with a NOP operation to make BRU input 1 available as the
335 * Blend/ROP unit B SRC input. Only needed for BRU, the BRS has no ROP
336 * unit.
338 if (entity->type == VSP1_ENTITY_BRU)
339 vsp1_bru_write(bru, dl, VI6_BRU_ROP,
340 VI6_BRU_ROP_DSTSEL_BRUIN(1) |
341 VI6_BRU_ROP_CROP(VI6_ROP_NOP) |
342 VI6_BRU_ROP_AROP(VI6_ROP_NOP));
344 for (i = 0; i < bru->entity.source_pad; ++i) {
345 bool premultiplied = false;
346 u32 ctrl = 0;
349 * Configure all Blend/ROP units corresponding to an enabled BRU
350 * input for alpha blending. Blend/ROP units corresponding to
351 * disabled BRU inputs are used in ROP NOP mode to ignore the
352 * SRC input.
354 if (bru->inputs[i].rpf) {
355 ctrl |= VI6_BRU_CTRL_RBC;
357 premultiplied = bru->inputs[i].rpf->format.flags
358 & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA;
359 } else {
360 ctrl |= VI6_BRU_CTRL_CROP(VI6_ROP_NOP)
361 | VI6_BRU_CTRL_AROP(VI6_ROP_NOP);
365 * Select the virtual RPF as the Blend/ROP unit A DST input to
366 * serve as a background color.
368 if (i == 0)
369 ctrl |= VI6_BRU_CTRL_DSTSEL_VRPF;
372 * Route inputs 0 to 3 as SRC inputs to Blend/ROP units A to D
373 * in that order. In the BRU the Blend/ROP unit B SRC is
374 * hardwired to the ROP unit output, the corresponding register
375 * bits must be set to 0. The BRS has no ROP unit and doesn't
376 * need any special processing.
378 if (!(entity->type == VSP1_ENTITY_BRU && i == 1))
379 ctrl |= VI6_BRU_CTRL_SRCSEL_BRUIN(i);
381 vsp1_bru_write(bru, dl, VI6_BRU_CTRL(i), ctrl);
384 * Harcode the blending formula to
386 * DSTc = DSTc * (1 - SRCa) + SRCc * SRCa
387 * DSTa = DSTa * (1 - SRCa) + SRCa
389 * when the SRC input isn't premultiplied, and to
391 * DSTc = DSTc * (1 - SRCa) + SRCc
392 * DSTa = DSTa * (1 - SRCa) + SRCa
394 * otherwise.
396 vsp1_bru_write(bru, dl, VI6_BRU_BLD(i),
397 VI6_BRU_BLD_CCMDX_255_SRC_A |
398 (premultiplied ? VI6_BRU_BLD_CCMDY_COEFY :
399 VI6_BRU_BLD_CCMDY_SRC_A) |
400 VI6_BRU_BLD_ACMDX_255_SRC_A |
401 VI6_BRU_BLD_ACMDY_COEFY |
402 (0xff << VI6_BRU_BLD_COEFY_SHIFT));
406 static const struct vsp1_entity_operations bru_entity_ops = {
407 .configure = bru_configure,
410 /* -----------------------------------------------------------------------------
411 * Initialization and Cleanup
414 struct vsp1_bru *vsp1_bru_create(struct vsp1_device *vsp1,
415 enum vsp1_entity_type type)
417 struct vsp1_bru *bru;
418 unsigned int num_pads;
419 const char *name;
420 int ret;
422 bru = devm_kzalloc(vsp1->dev, sizeof(*bru), GFP_KERNEL);
423 if (bru == NULL)
424 return ERR_PTR(-ENOMEM);
426 bru->base = type == VSP1_ENTITY_BRU ? VI6_BRU_BASE : VI6_BRS_BASE;
427 bru->entity.ops = &bru_entity_ops;
428 bru->entity.type = type;
430 if (type == VSP1_ENTITY_BRU) {
431 num_pads = vsp1->info->num_bru_inputs + 1;
432 name = "bru";
433 } else {
434 num_pads = 3;
435 name = "brs";
438 ret = vsp1_entity_init(vsp1, &bru->entity, name, num_pads, &bru_ops,
439 MEDIA_ENT_F_PROC_VIDEO_COMPOSER);
440 if (ret < 0)
441 return ERR_PTR(ret);
443 /* Initialize the control handler. */
444 v4l2_ctrl_handler_init(&bru->ctrls, 1);
445 v4l2_ctrl_new_std(&bru->ctrls, &bru_ctrl_ops, V4L2_CID_BG_COLOR,
446 0, 0xffffff, 1, 0);
448 bru->bgcolor = 0;
450 bru->entity.subdev.ctrl_handler = &bru->ctrls;
452 if (bru->ctrls.error) {
453 dev_err(vsp1->dev, "%s: failed to initialize controls\n", name);
454 ret = bru->ctrls.error;
455 vsp1_entity_destroy(&bru->entity);
456 return ERR_PTR(ret);
459 return bru;