2 * vimc-sensor.c Virtual Media Controller Driver
4 * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 #include <linux/component.h>
19 #include <linux/module.h>
20 #include <linux/mod_devicetable.h>
21 #include <linux/platform_device.h>
22 #include <linux/v4l2-mediabus.h>
23 #include <linux/vmalloc.h>
24 #include <media/v4l2-ctrls.h>
25 #include <media/v4l2-event.h>
26 #include <media/v4l2-subdev.h>
27 #include <media/tpg/v4l2-tpg.h>
29 #include "vimc-common.h"
31 #define VIMC_SEN_DRV_NAME "vimc-sensor"
33 struct vimc_sen_device {
34 struct vimc_ent_device ved;
35 struct v4l2_subdev sd;
38 struct task_struct *kthread_sen;
40 /* The active format */
41 struct v4l2_mbus_framefmt mbus_format;
42 struct v4l2_ctrl_handler hdl;
45 static const struct v4l2_mbus_framefmt fmt_default = {
48 .code = MEDIA_BUS_FMT_RGB888_1X24,
49 .field = V4L2_FIELD_NONE,
50 .colorspace = V4L2_COLORSPACE_DEFAULT,
53 static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
54 struct v4l2_subdev_pad_config *cfg)
58 for (i = 0; i < sd->entity.num_pads; i++) {
59 struct v4l2_mbus_framefmt *mf;
61 mf = v4l2_subdev_get_try_format(sd, cfg, i);
68 static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
69 struct v4l2_subdev_pad_config *cfg,
70 struct v4l2_subdev_frame_size_enum *fse)
75 fse->min_width = VIMC_FRAME_MIN_WIDTH;
76 fse->max_width = VIMC_FRAME_MAX_WIDTH;
77 fse->min_height = VIMC_FRAME_MIN_HEIGHT;
78 fse->max_height = VIMC_FRAME_MAX_HEIGHT;
83 static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
84 struct v4l2_subdev_pad_config *cfg,
85 struct v4l2_subdev_format *fmt)
87 struct vimc_sen_device *vsen =
88 container_of(sd, struct vimc_sen_device, sd);
90 fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
91 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
97 static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
99 u32 pixelformat = vsen->ved.stream->producer_pixfmt;
100 const struct v4l2_format_info *pix_info;
102 pix_info = v4l2_format_info(pixelformat);
104 tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
105 vsen->mbus_format.height, vsen->mbus_format.field);
106 tpg_s_bytesperline(&vsen->tpg, 0,
107 vsen->mbus_format.width * pix_info->bpp[0]);
108 tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
109 tpg_s_fourcc(&vsen->tpg, pixelformat);
110 /* TODO: add support for V4L2_FIELD_ALTERNATE */
111 tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
112 tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
113 tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
114 tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
115 tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
118 static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
120 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
121 VIMC_FRAME_MAX_WIDTH) & ~1;
122 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
123 VIMC_FRAME_MAX_HEIGHT) & ~1;
125 /* TODO: add support for V4L2_FIELD_ALTERNATE */
126 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
127 fmt->field = fmt_default.field;
129 vimc_colorimetry_clamp(fmt);
132 static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
133 struct v4l2_subdev_pad_config *cfg,
134 struct v4l2_subdev_format *fmt)
136 struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
137 struct v4l2_mbus_framefmt *mf;
139 if (!vimc_mbus_code_supported(fmt->format.code))
140 fmt->format.code = fmt_default.code;
142 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
143 /* Do not change the format while stream is on */
147 mf = &vsen->mbus_format;
149 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
152 /* Set the new format */
153 vimc_sen_adjust_fmt(&fmt->format);
155 dev_dbg(vsen->dev, "%s: format update: "
156 "old:%dx%d (0x%x, %d, %d, %d, %d) "
157 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
159 mf->width, mf->height, mf->code,
160 mf->colorspace, mf->quantization,
161 mf->xfer_func, mf->ycbcr_enc,
163 fmt->format.width, fmt->format.height, fmt->format.code,
164 fmt->format.colorspace, fmt->format.quantization,
165 fmt->format.xfer_func, fmt->format.ycbcr_enc);
172 static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
173 .init_cfg = vimc_sen_init_cfg,
174 .enum_mbus_code = vimc_enum_mbus_code,
175 .enum_frame_size = vimc_sen_enum_frame_size,
176 .get_fmt = vimc_sen_get_fmt,
177 .set_fmt = vimc_sen_set_fmt,
180 static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
181 const void *sink_frame)
183 struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
186 tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
190 static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
192 struct vimc_sen_device *vsen =
193 container_of(sd, struct vimc_sen_device, sd);
196 u32 pixelformat = vsen->ved.stream->producer_pixfmt;
197 const struct v4l2_format_info *pix_info;
198 unsigned int frame_size;
200 if (vsen->kthread_sen)
201 /* tpg is already executing */
204 /* Calculate the frame size */
205 pix_info = v4l2_format_info(pixelformat);
206 frame_size = vsen->mbus_format.width * pix_info->bpp[0] *
207 vsen->mbus_format.height;
210 * Allocate the frame buffer. Use vmalloc to be able to
211 * allocate a large amount of memory
213 vsen->frame = vmalloc(frame_size);
217 /* configure the test pattern generator */
218 vimc_sen_tpg_s_format(vsen);
230 static const struct v4l2_subdev_core_ops vimc_sen_core_ops = {
231 .log_status = v4l2_ctrl_subdev_log_status,
232 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
233 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
236 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
237 .s_stream = vimc_sen_s_stream,
240 static const struct v4l2_subdev_ops vimc_sen_ops = {
241 .core = &vimc_sen_core_ops,
242 .pad = &vimc_sen_pad_ops,
243 .video = &vimc_sen_video_ops,
246 static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
248 struct vimc_sen_device *vsen =
249 container_of(ctrl->handler, struct vimc_sen_device, hdl);
252 case VIMC_CID_TEST_PATTERN:
253 tpg_s_pattern(&vsen->tpg, ctrl->val);
256 tpg_s_hflip(&vsen->tpg, ctrl->val);
259 tpg_s_vflip(&vsen->tpg, ctrl->val);
261 case V4L2_CID_BRIGHTNESS:
262 tpg_s_brightness(&vsen->tpg, ctrl->val);
264 case V4L2_CID_CONTRAST:
265 tpg_s_contrast(&vsen->tpg, ctrl->val);
268 tpg_s_hue(&vsen->tpg, ctrl->val);
270 case V4L2_CID_SATURATION:
271 tpg_s_saturation(&vsen->tpg, ctrl->val);
279 static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = {
280 .s_ctrl = vimc_sen_s_ctrl,
283 static void vimc_sen_release(struct v4l2_subdev *sd)
285 struct vimc_sen_device *vsen =
286 container_of(sd, struct vimc_sen_device, sd);
288 v4l2_ctrl_handler_free(&vsen->hdl);
289 tpg_free(&vsen->tpg);
293 static const struct v4l2_subdev_internal_ops vimc_sen_int_ops = {
294 .release = vimc_sen_release,
297 static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
300 struct vimc_ent_device *ved = dev_get_drvdata(comp);
301 struct vimc_sen_device *vsen =
302 container_of(ved, struct vimc_sen_device, ved);
304 vimc_ent_sd_unregister(ved, &vsen->sd);
307 /* Image Processing Controls */
308 static const struct v4l2_ctrl_config vimc_sen_ctrl_class = {
309 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
310 .id = VIMC_CID_VIMC_CLASS,
311 .name = "VIMC Controls",
312 .type = V4L2_CTRL_TYPE_CTRL_CLASS,
315 static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
316 .ops = &vimc_sen_ctrl_ops,
317 .id = VIMC_CID_TEST_PATTERN,
318 .name = "Test Pattern",
319 .type = V4L2_CTRL_TYPE_MENU,
320 .max = TPG_PAT_NOISE,
321 .qmenu = tpg_pattern_strings,
324 static int vimc_sen_comp_bind(struct device *comp, struct device *master,
327 struct v4l2_device *v4l2_dev = master_data;
328 struct vimc_platform_data *pdata = comp->platform_data;
329 struct vimc_sen_device *vsen;
332 /* Allocate the vsen struct */
333 vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
337 v4l2_ctrl_handler_init(&vsen->hdl, 4);
339 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
340 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
341 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
342 V4L2_CID_VFLIP, 0, 1, 1, 0);
343 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
344 V4L2_CID_HFLIP, 0, 1, 1, 0);
345 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
346 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
347 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
348 V4L2_CID_CONTRAST, 0, 255, 1, 128);
349 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
350 V4L2_CID_HUE, -128, 127, 1, 0);
351 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
352 V4L2_CID_SATURATION, 0, 255, 1, 128);
353 vsen->sd.ctrl_handler = &vsen->hdl;
354 if (vsen->hdl.error) {
355 ret = vsen->hdl.error;
359 /* Initialize ved and sd */
360 ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
362 MEDIA_ENT_F_CAM_SENSOR, 1,
363 (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
364 &vimc_sen_int_ops, &vimc_sen_ops);
368 vsen->ved.process_frame = vimc_sen_process_frame;
369 dev_set_drvdata(comp, &vsen->ved);
372 /* Initialize the frame format */
373 vsen->mbus_format = fmt_default;
375 /* Initialize the test pattern generator */
376 tpg_init(&vsen->tpg, vsen->mbus_format.width,
377 vsen->mbus_format.height);
378 ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
380 goto err_unregister_ent_sd;
384 err_unregister_ent_sd:
385 vimc_ent_sd_unregister(&vsen->ved, &vsen->sd);
387 v4l2_ctrl_handler_free(&vsen->hdl);
394 static const struct component_ops vimc_sen_comp_ops = {
395 .bind = vimc_sen_comp_bind,
396 .unbind = vimc_sen_comp_unbind,
399 static int vimc_sen_probe(struct platform_device *pdev)
401 return component_add(&pdev->dev, &vimc_sen_comp_ops);
404 static int vimc_sen_remove(struct platform_device *pdev)
406 component_del(&pdev->dev, &vimc_sen_comp_ops);
411 static const struct platform_device_id vimc_sen_driver_ids[] = {
413 .name = VIMC_SEN_DRV_NAME,
418 static struct platform_driver vimc_sen_pdrv = {
419 .probe = vimc_sen_probe,
420 .remove = vimc_sen_remove,
421 .id_table = vimc_sen_driver_ids,
423 .name = VIMC_SEN_DRV_NAME,
427 module_platform_driver(vimc_sen_pdrv);
429 MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
431 MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
432 MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
433 MODULE_LICENSE("GPL");