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>
22 #define SRU_MIN_SIZE 4U
23 #define SRU_MAX_SIZE 8190U
25 /* -----------------------------------------------------------------------------
29 static inline u32 vsp1_sru_read(struct vsp1_sru *sru, u32 reg)
31 return vsp1_read(sru->entity.vsp1, reg);
34 static inline void vsp1_sru_write(struct vsp1_sru *sru, u32 reg, u32 data)
36 vsp1_write(sru->entity.vsp1, reg, data);
39 /* -----------------------------------------------------------------------------
43 #define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE + 1)
45 struct vsp1_sru_param {
50 #define VI6_SRU_CTRL0_PARAMS(p0, p1) \
51 (((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) | \
52 ((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
54 #define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
55 (((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) | \
56 ((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) | \
57 ((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
59 static const struct vsp1_sru_param vsp1_sru_params[] = {
61 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
62 .ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
64 .ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
65 .ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
67 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
68 .ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
70 .ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
71 .ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
73 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
74 .ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
76 .ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
77 .ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
81 static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
83 struct vsp1_sru *sru =
84 container_of(ctrl->handler, struct vsp1_sru, ctrls);
85 const struct vsp1_sru_param *param;
89 case V4L2_CID_VSP1_SRU_INTENSITY:
90 param = &vsp1_sru_params[ctrl->val - 1];
92 value = vsp1_sru_read(sru, VI6_SRU_CTRL0);
93 value &= ~(VI6_SRU_CTRL0_PARAM0_MASK |
94 VI6_SRU_CTRL0_PARAM1_MASK);
95 value |= param->ctrl0;
96 vsp1_sru_write(sru, VI6_SRU_CTRL0, value);
98 vsp1_sru_write(sru, VI6_SRU_CTRL2, param->ctrl2);
105 static const struct v4l2_ctrl_ops sru_ctrl_ops = {
106 .s_ctrl = sru_s_ctrl,
109 static const struct v4l2_ctrl_config sru_intensity_control = {
110 .ops = &sru_ctrl_ops,
111 .id = V4L2_CID_VSP1_SRU_INTENSITY,
113 .type = V4L2_CTRL_TYPE_INTEGER,
120 /* -----------------------------------------------------------------------------
121 * V4L2 Subdevice Core Operations
124 static int sru_s_stream(struct v4l2_subdev *subdev, int enable)
126 struct vsp1_sru *sru = to_sru(subdev);
127 struct v4l2_mbus_framefmt *input;
128 struct v4l2_mbus_framefmt *output;
132 ret = vsp1_entity_set_streaming(&sru->entity, enable);
139 input = &sru->entity.formats[SRU_PAD_SINK];
140 output = &sru->entity.formats[SRU_PAD_SOURCE];
142 if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
143 ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
144 | VI6_SRU_CTRL0_PARAM4;
146 ctrl0 = VI6_SRU_CTRL0_PARAM3;
148 if (input->width != output->width)
149 ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
151 /* Take the control handler lock to ensure that the CTRL0 value won't be
152 * changed behind our back by a set control operation.
154 mutex_lock(sru->ctrls.lock);
155 ctrl0 |= vsp1_sru_read(sru, VI6_SRU_CTRL0)
156 & (VI6_SRU_CTRL0_PARAM0_MASK | VI6_SRU_CTRL0_PARAM1_MASK);
157 mutex_unlock(sru->ctrls.lock);
159 vsp1_sru_write(sru, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
164 /* -----------------------------------------------------------------------------
165 * V4L2 Subdevice Pad Operations
168 static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
169 struct v4l2_subdev_fh *fh,
170 struct v4l2_subdev_mbus_code_enum *code)
172 static const unsigned int codes[] = {
173 MEDIA_BUS_FMT_ARGB8888_1X32,
174 MEDIA_BUS_FMT_AYUV8_1X32,
176 struct v4l2_mbus_framefmt *format;
178 if (code->pad == SRU_PAD_SINK) {
179 if (code->index >= ARRAY_SIZE(codes))
182 code->code = codes[code->index];
184 /* The SRU can't perform format conversion, the sink format is
185 * always identical to the source format.
190 format = v4l2_subdev_get_try_format(fh, SRU_PAD_SINK);
191 code->code = format->code;
197 static int sru_enum_frame_size(struct v4l2_subdev *subdev,
198 struct v4l2_subdev_fh *fh,
199 struct v4l2_subdev_frame_size_enum *fse)
201 struct v4l2_mbus_framefmt *format;
203 format = v4l2_subdev_get_try_format(fh, SRU_PAD_SINK);
205 if (fse->index || fse->code != format->code)
208 if (fse->pad == SRU_PAD_SINK) {
209 fse->min_width = SRU_MIN_SIZE;
210 fse->max_width = SRU_MAX_SIZE;
211 fse->min_height = SRU_MIN_SIZE;
212 fse->max_height = SRU_MAX_SIZE;
214 fse->min_width = format->width;
215 fse->min_height = format->height;
216 if (format->width <= SRU_MAX_SIZE / 2 &&
217 format->height <= SRU_MAX_SIZE / 2) {
218 fse->max_width = format->width * 2;
219 fse->max_height = format->height * 2;
221 fse->max_width = format->width;
222 fse->max_height = format->height;
229 static int sru_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
230 struct v4l2_subdev_format *fmt)
232 struct vsp1_sru *sru = to_sru(subdev);
234 fmt->format = *vsp1_entity_get_pad_format(&sru->entity, fh, fmt->pad,
240 static void sru_try_format(struct vsp1_sru *sru, struct v4l2_subdev_fh *fh,
241 unsigned int pad, struct v4l2_mbus_framefmt *fmt,
242 enum v4l2_subdev_format_whence which)
244 struct v4l2_mbus_framefmt *format;
245 unsigned int input_area;
246 unsigned int output_area;
250 /* Default to YUV if the requested format is not supported. */
251 if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
252 fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
253 fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
255 fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
256 fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
260 /* The SRU can't perform format conversion. */
261 format = vsp1_entity_get_pad_format(&sru->entity, fh,
262 SRU_PAD_SINK, which);
263 fmt->code = format->code;
265 /* We can upscale by 2 in both direction, but not independently.
266 * Compare the input and output rectangles areas (avoiding
267 * integer overflows on the output): if the requested output
268 * area is larger than 1.5^2 the input area upscale by two,
269 * otherwise don't scale.
271 input_area = format->width * format->height;
272 output_area = min(fmt->width, SRU_MAX_SIZE)
273 * min(fmt->height, SRU_MAX_SIZE);
275 if (fmt->width <= SRU_MAX_SIZE / 2 &&
276 fmt->height <= SRU_MAX_SIZE / 2 &&
277 output_area > input_area * 9 / 4) {
278 fmt->width = format->width * 2;
279 fmt->height = format->height * 2;
281 fmt->width = format->width;
282 fmt->height = format->height;
287 fmt->field = V4L2_FIELD_NONE;
288 fmt->colorspace = V4L2_COLORSPACE_SRGB;
291 static int sru_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
292 struct v4l2_subdev_format *fmt)
294 struct vsp1_sru *sru = to_sru(subdev);
295 struct v4l2_mbus_framefmt *format;
297 sru_try_format(sru, fh, fmt->pad, &fmt->format, fmt->which);
299 format = vsp1_entity_get_pad_format(&sru->entity, fh, fmt->pad,
301 *format = fmt->format;
303 if (fmt->pad == SRU_PAD_SINK) {
304 /* Propagate the format to the source pad. */
305 format = vsp1_entity_get_pad_format(&sru->entity, fh,
306 SRU_PAD_SOURCE, fmt->which);
307 *format = fmt->format;
309 sru_try_format(sru, fh, SRU_PAD_SOURCE, format, fmt->which);
315 /* -----------------------------------------------------------------------------
316 * V4L2 Subdevice Operations
319 static struct v4l2_subdev_video_ops sru_video_ops = {
320 .s_stream = sru_s_stream,
323 static struct v4l2_subdev_pad_ops sru_pad_ops = {
324 .enum_mbus_code = sru_enum_mbus_code,
325 .enum_frame_size = sru_enum_frame_size,
326 .get_fmt = sru_get_format,
327 .set_fmt = sru_set_format,
330 static struct v4l2_subdev_ops sru_ops = {
331 .video = &sru_video_ops,
335 /* -----------------------------------------------------------------------------
336 * Initialization and Cleanup
339 struct vsp1_sru *vsp1_sru_create(struct vsp1_device *vsp1)
341 struct v4l2_subdev *subdev;
342 struct vsp1_sru *sru;
345 sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
347 return ERR_PTR(-ENOMEM);
349 sru->entity.type = VSP1_ENTITY_SRU;
351 ret = vsp1_entity_init(vsp1, &sru->entity, 2);
355 /* Initialize the V4L2 subdev. */
356 subdev = &sru->entity.subdev;
357 v4l2_subdev_init(subdev, &sru_ops);
359 subdev->entity.ops = &vsp1_media_ops;
360 subdev->internal_ops = &vsp1_subdev_internal_ops;
361 snprintf(subdev->name, sizeof(subdev->name), "%s sru",
362 dev_name(vsp1->dev));
363 v4l2_set_subdevdata(subdev, sru);
364 subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
366 vsp1_entity_init_formats(subdev, NULL);
368 /* Initialize the control handler. */
369 v4l2_ctrl_handler_init(&sru->ctrls, 1);
370 v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
372 sru->entity.subdev.ctrl_handler = &sru->ctrls;
374 if (sru->ctrls.error) {
375 dev_err(vsp1->dev, "sru: failed to initialize controls\n");
376 ret = sru->ctrls.error;
377 vsp1_entity_destroy(&sru->entity);