1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * vsp1_sru.c -- R-Car VSP1 Super Resolution Unit
4 *
5 * Copyright (C) 2013 Renesas Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10 #include <linux/device.h>
11 #include <linux/gfp.h>
12
13 #include <media/v4l2-subdev.h>
14
15 #include "vsp1.h"
16 #include "vsp1_dl.h"
17 #include "vsp1_pipe.h"
18 #include "vsp1_sru.h"
19
20 #define SRU_MIN_SIZE 4U
21 #define SRU_MAX_SIZE 8190U
22
23 /* -----------------------------------------------------------------------------
24 * Device Access
25 */
26
vsp1_sru_write(struct vsp1_sru * sru,struct vsp1_dl_body * dlb,u32 reg,u32 data)27 static inline void vsp1_sru_write(struct vsp1_sru *sru,
28 struct vsp1_dl_body *dlb, u32 reg, u32 data)
29 {
30 vsp1_dl_body_write(dlb, reg, data);
31 }
32
33 /* -----------------------------------------------------------------------------
34 * Controls
35 */
36
37 #define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE | 0x1001)
38
39 struct vsp1_sru_param {
40 u32 ctrl0;
41 u32 ctrl2;
42 };
43
44 #define VI6_SRU_CTRL0_PARAMS(p0, p1) \
45 (((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) | \
46 ((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
47
48 #define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
49 (((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) | \
50 ((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) | \
51 ((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
52
53 static const struct vsp1_sru_param vsp1_sru_params[] = {
54 {
55 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
56 .ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
57 }, {
58 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
59 .ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
60 }, {
61 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
62 .ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
63 }, {
64 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
65 .ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
66 }, {
67 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
68 .ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
69 }, {
70 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
71 .ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
72 },
73 };
74
sru_s_ctrl(struct v4l2_ctrl * ctrl)75 static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
76 {
77 struct vsp1_sru *sru =
78 container_of(ctrl->handler, struct vsp1_sru, ctrls);
79
80 switch (ctrl->id) {
81 case V4L2_CID_VSP1_SRU_INTENSITY:
82 sru->intensity = ctrl->val;
83 break;
84 }
85
86 return 0;
87 }
88
89 static const struct v4l2_ctrl_ops sru_ctrl_ops = {
90 .s_ctrl = sru_s_ctrl,
91 };
92
93 static const struct v4l2_ctrl_config sru_intensity_control = {
94 .ops = &sru_ctrl_ops,
95 .id = V4L2_CID_VSP1_SRU_INTENSITY,
96 .name = "Intensity",
97 .type = V4L2_CTRL_TYPE_INTEGER,
98 .min = 1,
99 .max = 6,
100 .def = 1,
101 .step = 1,
102 };
103
104 /* -----------------------------------------------------------------------------
105 * V4L2 Subdevice Operations
106 */
107
sru_enum_mbus_code(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)108 static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
109 struct v4l2_subdev_pad_config *cfg,
110 struct v4l2_subdev_mbus_code_enum *code)
111 {
112 static const unsigned int codes[] = {
113 MEDIA_BUS_FMT_ARGB8888_1X32,
114 MEDIA_BUS_FMT_AYUV8_1X32,
115 };
116
117 return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
118 ARRAY_SIZE(codes));
119 }
120
sru_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)121 static int sru_enum_frame_size(struct v4l2_subdev *subdev,
122 struct v4l2_subdev_pad_config *cfg,
123 struct v4l2_subdev_frame_size_enum *fse)
124 {
125 struct vsp1_sru *sru = to_sru(subdev);
126 struct v4l2_subdev_pad_config *config;
127 struct v4l2_mbus_framefmt *format;
128 int ret = 0;
129
130 config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which);
131 if (!config)
132 return -EINVAL;
133
134 format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK);
135
136 mutex_lock(&sru->entity.lock);
137
138 if (fse->index || fse->code != format->code) {
139 ret = -EINVAL;
140 goto done;
141 }
142
143 if (fse->pad == SRU_PAD_SINK) {
144 fse->min_width = SRU_MIN_SIZE;
145 fse->max_width = SRU_MAX_SIZE;
146 fse->min_height = SRU_MIN_SIZE;
147 fse->max_height = SRU_MAX_SIZE;
148 } else {
149 fse->min_width = format->width;
150 fse->min_height = format->height;
151 if (format->width <= SRU_MAX_SIZE / 2 &&
152 format->height <= SRU_MAX_SIZE / 2) {
153 fse->max_width = format->width * 2;
154 fse->max_height = format->height * 2;
155 } else {
156 fse->max_width = format->width;
157 fse->max_height = format->height;
158 }
159 }
160
161 done:
162 mutex_unlock(&sru->entity.lock);
163 return ret;
164 }
165
sru_try_format(struct vsp1_sru * sru,struct v4l2_subdev_pad_config * config,unsigned int pad,struct v4l2_mbus_framefmt * fmt)166 static void sru_try_format(struct vsp1_sru *sru,
167 struct v4l2_subdev_pad_config *config,
168 unsigned int pad, struct v4l2_mbus_framefmt *fmt)
169 {
170 struct v4l2_mbus_framefmt *format;
171 unsigned int input_area;
172 unsigned int output_area;
173
174 switch (pad) {
175 case SRU_PAD_SINK:
176 /* Default to YUV if the requested format is not supported. */
177 if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
178 fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
179 fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
180
181 fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
182 fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
183 break;
184
185 case SRU_PAD_SOURCE:
186 /* The SRU can't perform format conversion. */
187 format = vsp1_entity_get_pad_format(&sru->entity, config,
188 SRU_PAD_SINK);
189 fmt->code = format->code;
190
191 /*
192 * We can upscale by 2 in both direction, but not independently.
193 * Compare the input and output rectangles areas (avoiding
194 * integer overflows on the output): if the requested output
195 * area is larger than 1.5^2 the input area upscale by two,
196 * otherwise don't scale.
197 */
198 input_area = format->width * format->height;
199 output_area = min(fmt->width, SRU_MAX_SIZE)
200 * min(fmt->height, SRU_MAX_SIZE);
201
202 if (fmt->width <= SRU_MAX_SIZE / 2 &&
203 fmt->height <= SRU_MAX_SIZE / 2 &&
204 output_area > input_area * 9 / 4) {
205 fmt->width = format->width * 2;
206 fmt->height = format->height * 2;
207 } else {
208 fmt->width = format->width;
209 fmt->height = format->height;
210 }
211 break;
212 }
213
214 fmt->field = V4L2_FIELD_NONE;
215 fmt->colorspace = V4L2_COLORSPACE_SRGB;
216 }
217
sru_set_format(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * fmt)218 static int sru_set_format(struct v4l2_subdev *subdev,
219 struct v4l2_subdev_pad_config *cfg,
220 struct v4l2_subdev_format *fmt)
221 {
222 struct vsp1_sru *sru = to_sru(subdev);
223 struct v4l2_subdev_pad_config *config;
224 struct v4l2_mbus_framefmt *format;
225 int ret = 0;
226
227 mutex_lock(&sru->entity.lock);
228
229 config = vsp1_entity_get_pad_config(&sru->entity, cfg, fmt->which);
230 if (!config) {
231 ret = -EINVAL;
232 goto done;
233 }
234
235 sru_try_format(sru, config, fmt->pad, &fmt->format);
236
237 format = vsp1_entity_get_pad_format(&sru->entity, config, fmt->pad);
238 *format = fmt->format;
239
240 if (fmt->pad == SRU_PAD_SINK) {
241 /* Propagate the format to the source pad. */
242 format = vsp1_entity_get_pad_format(&sru->entity, config,
243 SRU_PAD_SOURCE);
244 *format = fmt->format;
245
246 sru_try_format(sru, config, SRU_PAD_SOURCE, format);
247 }
248
249 done:
250 mutex_unlock(&sru->entity.lock);
251 return ret;
252 }
253
254 static const struct v4l2_subdev_pad_ops sru_pad_ops = {
255 .init_cfg = vsp1_entity_init_cfg,
256 .enum_mbus_code = sru_enum_mbus_code,
257 .enum_frame_size = sru_enum_frame_size,
258 .get_fmt = vsp1_subdev_get_pad_format,
259 .set_fmt = sru_set_format,
260 };
261
262 static const struct v4l2_subdev_ops sru_ops = {
263 .pad = &sru_pad_ops,
264 };
265
266 /* -----------------------------------------------------------------------------
267 * VSP1 Entity Operations
268 */
269
sru_configure_stream(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)270 static void sru_configure_stream(struct vsp1_entity *entity,
271 struct vsp1_pipeline *pipe,
272 struct vsp1_dl_list *dl,
273 struct vsp1_dl_body *dlb)
274 {
275 const struct vsp1_sru_param *param;
276 struct vsp1_sru *sru = to_sru(&entity->subdev);
277 struct v4l2_mbus_framefmt *input;
278 struct v4l2_mbus_framefmt *output;
279 u32 ctrl0;
280
281 input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
282 SRU_PAD_SINK);
283 output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
284 SRU_PAD_SOURCE);
285
286 if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
287 ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
288 | VI6_SRU_CTRL0_PARAM4;
289 else
290 ctrl0 = VI6_SRU_CTRL0_PARAM3;
291
292 if (input->width != output->width)
293 ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
294
295 param = &vsp1_sru_params[sru->intensity - 1];
296
297 ctrl0 |= param->ctrl0;
298
299 vsp1_sru_write(sru, dlb, VI6_SRU_CTRL0, ctrl0);
300 vsp1_sru_write(sru, dlb, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
301 vsp1_sru_write(sru, dlb, VI6_SRU_CTRL2, param->ctrl2);
302 }
303
sru_max_width(struct vsp1_entity * entity,struct vsp1_pipeline * pipe)304 static unsigned int sru_max_width(struct vsp1_entity *entity,
305 struct vsp1_pipeline *pipe)
306 {
307 struct vsp1_sru *sru = to_sru(&entity->subdev);
308 struct v4l2_mbus_framefmt *input;
309 struct v4l2_mbus_framefmt *output;
310
311 input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
312 SRU_PAD_SINK);
313 output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
314 SRU_PAD_SOURCE);
315
316 /*
317 * The maximum input width of the SRU is 288 input pixels, but 32
318 * pixels are reserved to support overlapping partition windows when
319 * scaling.
320 */
321 if (input->width != output->width)
322 return 512;
323 else
324 return 256;
325 }
326
sru_partition(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_partition * partition,unsigned int partition_idx,struct vsp1_partition_window * window)327 static void sru_partition(struct vsp1_entity *entity,
328 struct vsp1_pipeline *pipe,
329 struct vsp1_partition *partition,
330 unsigned int partition_idx,
331 struct vsp1_partition_window *window)
332 {
333 struct vsp1_sru *sru = to_sru(&entity->subdev);
334 struct v4l2_mbus_framefmt *input;
335 struct v4l2_mbus_framefmt *output;
336
337 input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
338 SRU_PAD_SINK);
339 output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
340 SRU_PAD_SOURCE);
341
342 /* Adapt if SRUx2 is enabled. */
343 if (input->width != output->width) {
344 window->width /= 2;
345 window->left /= 2;
346 }
347
348 partition->sru = *window;
349 }
350
351 static const struct vsp1_entity_operations sru_entity_ops = {
352 .configure_stream = sru_configure_stream,
353 .max_width = sru_max_width,
354 .partition = sru_partition,
355 };
356
357 /* -----------------------------------------------------------------------------
358 * Initialization and Cleanup
359 */
360
vsp1_sru_create(struct vsp1_device * vsp1)361 struct vsp1_sru *vsp1_sru_create(struct vsp1_device *vsp1)
362 {
363 struct vsp1_sru *sru;
364 int ret;
365
366 sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
367 if (sru == NULL)
368 return ERR_PTR(-ENOMEM);
369
370 sru->entity.ops = &sru_entity_ops;
371 sru->entity.type = VSP1_ENTITY_SRU;
372
373 ret = vsp1_entity_init(vsp1, &sru->entity, "sru", 2, &sru_ops,
374 MEDIA_ENT_F_PROC_VIDEO_SCALER);
375 if (ret < 0)
376 return ERR_PTR(ret);
377
378 /* Initialize the control handler. */
379 v4l2_ctrl_handler_init(&sru->ctrls, 1);
380 v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
381
382 sru->intensity = 1;
383
384 sru->entity.subdev.ctrl_handler = &sru->ctrls;
385
386 if (sru->ctrls.error) {
387 dev_err(vsp1->dev, "sru: failed to initialize controls\n");
388 ret = sru->ctrls.error;
389 vsp1_entity_destroy(&sru->entity);
390 return ERR_PTR(ret);
391 }
392
393 return sru;
394 }
395