2 * vsp1_sru.c -- R-Car VSP1 Super Resolution 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>
23 #define SRU_MIN_SIZE 4U
24 #define SRU_MAX_SIZE 8190U
26 /* -----------------------------------------------------------------------------
30 static inline void vsp1_sru_write(struct vsp1_sru *sru, struct vsp1_dl_list *dl,
33 vsp1_dl_list_write(dl, reg, data);
36 /* -----------------------------------------------------------------------------
40 #define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE | 0x1001)
42 struct vsp1_sru_param {
47 #define VI6_SRU_CTRL0_PARAMS(p0, p1) \
48 (((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) | \
49 ((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
51 #define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
52 (((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) | \
53 ((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) | \
54 ((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
56 static const struct vsp1_sru_param vsp1_sru_params[] = {
58 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
59 .ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
61 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
62 .ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
64 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
65 .ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
67 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
68 .ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
70 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
71 .ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
73 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
74 .ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
78 static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
80 struct vsp1_sru *sru =
81 container_of(ctrl->handler, struct vsp1_sru, ctrls);
84 case V4L2_CID_VSP1_SRU_INTENSITY:
85 sru->intensity = ctrl->val;
92 static const struct v4l2_ctrl_ops sru_ctrl_ops = {
96 static const struct v4l2_ctrl_config sru_intensity_control = {
98 .id = V4L2_CID_VSP1_SRU_INTENSITY,
100 .type = V4L2_CTRL_TYPE_INTEGER,
107 /* -----------------------------------------------------------------------------
108 * V4L2 Subdevice Operations
111 static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
112 struct v4l2_subdev_pad_config *cfg,
113 struct v4l2_subdev_mbus_code_enum *code)
115 static const unsigned int codes[] = {
116 MEDIA_BUS_FMT_ARGB8888_1X32,
117 MEDIA_BUS_FMT_AYUV8_1X32,
120 return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
124 static int sru_enum_frame_size(struct v4l2_subdev *subdev,
125 struct v4l2_subdev_pad_config *cfg,
126 struct v4l2_subdev_frame_size_enum *fse)
128 struct vsp1_sru *sru = to_sru(subdev);
129 struct v4l2_subdev_pad_config *config;
130 struct v4l2_mbus_framefmt *format;
133 config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which);
137 format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK);
139 mutex_lock(&sru->entity.lock);
141 if (fse->index || fse->code != format->code) {
146 if (fse->pad == SRU_PAD_SINK) {
147 fse->min_width = SRU_MIN_SIZE;
148 fse->max_width = SRU_MAX_SIZE;
149 fse->min_height = SRU_MIN_SIZE;
150 fse->max_height = SRU_MAX_SIZE;
152 fse->min_width = format->width;
153 fse->min_height = format->height;
154 if (format->width <= SRU_MAX_SIZE / 2 &&
155 format->height <= SRU_MAX_SIZE / 2) {
156 fse->max_width = format->width * 2;
157 fse->max_height = format->height * 2;
159 fse->max_width = format->width;
160 fse->max_height = format->height;
165 mutex_unlock(&sru->entity.lock);
169 static void sru_try_format(struct vsp1_sru *sru,
170 struct v4l2_subdev_pad_config *config,
171 unsigned int pad, struct v4l2_mbus_framefmt *fmt)
173 struct v4l2_mbus_framefmt *format;
174 unsigned int input_area;
175 unsigned int output_area;
179 /* Default to YUV if the requested format is not supported. */
180 if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
181 fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
182 fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
184 fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
185 fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
189 /* The SRU can't perform format conversion. */
190 format = vsp1_entity_get_pad_format(&sru->entity, config,
192 fmt->code = format->code;
194 /* We can upscale by 2 in both direction, but not independently.
195 * Compare the input and output rectangles areas (avoiding
196 * integer overflows on the output): if the requested output
197 * area is larger than 1.5^2 the input area upscale by two,
198 * otherwise don't scale.
200 input_area = format->width * format->height;
201 output_area = min(fmt->width, SRU_MAX_SIZE)
202 * min(fmt->height, SRU_MAX_SIZE);
204 if (fmt->width <= SRU_MAX_SIZE / 2 &&
205 fmt->height <= SRU_MAX_SIZE / 2 &&
206 output_area > input_area * 9 / 4) {
207 fmt->width = format->width * 2;
208 fmt->height = format->height * 2;
210 fmt->width = format->width;
211 fmt->height = format->height;
216 fmt->field = V4L2_FIELD_NONE;
217 fmt->colorspace = V4L2_COLORSPACE_SRGB;
220 static int sru_set_format(struct v4l2_subdev *subdev,
221 struct v4l2_subdev_pad_config *cfg,
222 struct v4l2_subdev_format *fmt)
224 struct vsp1_sru *sru = to_sru(subdev);
225 struct v4l2_subdev_pad_config *config;
226 struct v4l2_mbus_framefmt *format;
229 mutex_lock(&sru->entity.lock);
231 config = vsp1_entity_get_pad_config(&sru->entity, cfg, fmt->which);
237 sru_try_format(sru, config, fmt->pad, &fmt->format);
239 format = vsp1_entity_get_pad_format(&sru->entity, config, fmt->pad);
240 *format = fmt->format;
242 if (fmt->pad == SRU_PAD_SINK) {
243 /* Propagate the format to the source pad. */
244 format = vsp1_entity_get_pad_format(&sru->entity, config,
246 *format = fmt->format;
248 sru_try_format(sru, config, SRU_PAD_SOURCE, format);
252 mutex_unlock(&sru->entity.lock);
256 static const struct v4l2_subdev_pad_ops sru_pad_ops = {
257 .init_cfg = vsp1_entity_init_cfg,
258 .enum_mbus_code = sru_enum_mbus_code,
259 .enum_frame_size = sru_enum_frame_size,
260 .get_fmt = vsp1_subdev_get_pad_format,
261 .set_fmt = sru_set_format,
264 static const struct v4l2_subdev_ops sru_ops = {
268 /* -----------------------------------------------------------------------------
269 * VSP1 Entity Operations
272 static void sru_configure(struct vsp1_entity *entity,
273 struct vsp1_pipeline *pipe,
274 struct vsp1_dl_list *dl,
275 enum vsp1_entity_params params)
277 const struct vsp1_sru_param *param;
278 struct vsp1_sru *sru = to_sru(&entity->subdev);
279 struct v4l2_mbus_framefmt *input;
280 struct v4l2_mbus_framefmt *output;
283 if (params != VSP1_ENTITY_PARAMS_INIT)
286 input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
288 output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
291 if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
292 ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
293 | VI6_SRU_CTRL0_PARAM4;
295 ctrl0 = VI6_SRU_CTRL0_PARAM3;
297 if (input->width != output->width)
298 ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
300 param = &vsp1_sru_params[sru->intensity - 1];
302 ctrl0 |= param->ctrl0;
304 vsp1_sru_write(sru, dl, VI6_SRU_CTRL0, ctrl0);
305 vsp1_sru_write(sru, dl, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
306 vsp1_sru_write(sru, dl, VI6_SRU_CTRL2, param->ctrl2);
309 static unsigned int sru_max_width(struct vsp1_entity *entity,
310 struct vsp1_pipeline *pipe)
312 struct vsp1_sru *sru = to_sru(&entity->subdev);
313 struct v4l2_mbus_framefmt *input;
314 struct v4l2_mbus_framefmt *output;
316 input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
318 output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
321 if (input->width != output->width)
327 static const struct vsp1_entity_operations sru_entity_ops = {
328 .configure = sru_configure,
329 .max_width = sru_max_width,
332 /* -----------------------------------------------------------------------------
333 * Initialization and Cleanup
336 struct vsp1_sru *vsp1_sru_create(struct vsp1_device *vsp1)
338 struct vsp1_sru *sru;
341 sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
343 return ERR_PTR(-ENOMEM);
345 sru->entity.ops = &sru_entity_ops;
346 sru->entity.type = VSP1_ENTITY_SRU;
348 ret = vsp1_entity_init(vsp1, &sru->entity, "sru", 2, &sru_ops,
349 MEDIA_ENT_F_PROC_VIDEO_SCALER);
353 /* Initialize the control handler. */
354 v4l2_ctrl_handler_init(&sru->ctrls, 1);
355 v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
359 sru->entity.subdev.ctrl_handler = &sru->ctrls;
361 if (sru->ctrls.error) {
362 dev_err(vsp1->dev, "sru: failed to initialize controls\n");
363 ret = sru->ctrls.error;
364 vsp1_entity_destroy(&sru->entity);