linux/drivers/media/platform/vimc/vimc-debayer.c

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/*
* vimc-debayer.c Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/component.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/vmalloc.h>
#include <linux/v4l2-mediabus.h>
#include <media/v4l2-subdev.h>
#include "vimc-common.h"
#define VIMC_DEB_DRV_NAME "vimc-debayer"
static unsigned int deb_mean_win_size = 3;
module_param(deb_mean_win_size, uint, 0000);
MODULE_PARM_DESC(deb_mean_win_size, " the window size to calculate the mean.\n"
"NOTE: the window size need to be an odd number, as the main pixel "
"stays in the center of the window, otherwise the next odd number "
"is considered");
#define IS_SINK(pad) (!pad)
#define IS_SRC(pad) (pad)
enum vimc_deb_rgb_colors {
VIMC_DEB_RED = 0,
VIMC_DEB_GREEN = 1,
VIMC_DEB_BLUE = 2,
};
struct vimc_deb_pix_map {
u32 code;
enum vimc_deb_rgb_colors order[2][2];
};
struct vimc_deb_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
struct device *dev;
/* The active format */
struct v4l2_mbus_framefmt sink_fmt;
u32 src_code;
void (*set_rgb_src)(struct vimc_deb_device *vdeb, unsigned int lin,
unsigned int col, unsigned int rgb[3]);
/* Values calculated when the stream starts */
u8 *src_frame;
const struct vimc_deb_pix_map *sink_pix_map;
unsigned int sink_bpp;
};
static const struct v4l2_mbus_framefmt sink_fmt_default = {
.width = 640,
.height = 480,
.code = MEDIA_BUS_FMT_RGB888_1X24,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_DEFAULT,
};
static const struct vimc_deb_pix_map vimc_deb_pix_map_list[] = {
{
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
.order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN },
{ VIMC_DEB_GREEN, VIMC_DEB_RED } }
},
{
.code = MEDIA_BUS_FMT_SGBRG8_1X8,
.order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE },
{ VIMC_DEB_RED, VIMC_DEB_GREEN } }
},
{
.code = MEDIA_BUS_FMT_SGRBG8_1X8,
.order = { { VIMC_DEB_GREEN, VIMC_DEB_RED },
{ VIMC_DEB_BLUE, VIMC_DEB_GREEN } }
},
{
.code = MEDIA_BUS_FMT_SRGGB8_1X8,
.order = { { VIMC_DEB_RED, VIMC_DEB_GREEN },
{ VIMC_DEB_GREEN, VIMC_DEB_BLUE } }
},
{
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN },
{ VIMC_DEB_GREEN, VIMC_DEB_RED } }
},
{
.code = MEDIA_BUS_FMT_SGBRG10_1X10,
.order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE },
{ VIMC_DEB_RED, VIMC_DEB_GREEN } }
},
{
.code = MEDIA_BUS_FMT_SGRBG10_1X10,
.order = { { VIMC_DEB_GREEN, VIMC_DEB_RED },
{ VIMC_DEB_BLUE, VIMC_DEB_GREEN } }
},
{
.code = MEDIA_BUS_FMT_SRGGB10_1X10,
.order = { { VIMC_DEB_RED, VIMC_DEB_GREEN },
{ VIMC_DEB_GREEN, VIMC_DEB_BLUE } }
},
{
.code = MEDIA_BUS_FMT_SBGGR12_1X12,
.order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN },
{ VIMC_DEB_GREEN, VIMC_DEB_RED } }
},
{
.code = MEDIA_BUS_FMT_SGBRG12_1X12,
.order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE },
{ VIMC_DEB_RED, VIMC_DEB_GREEN } }
},
{
.code = MEDIA_BUS_FMT_SGRBG12_1X12,
.order = { { VIMC_DEB_GREEN, VIMC_DEB_RED },
{ VIMC_DEB_BLUE, VIMC_DEB_GREEN } }
},
{
.code = MEDIA_BUS_FMT_SRGGB12_1X12,
.order = { { VIMC_DEB_RED, VIMC_DEB_GREEN },
{ VIMC_DEB_GREEN, VIMC_DEB_BLUE } }
},
};
static const struct vimc_deb_pix_map *vimc_deb_pix_map_by_code(u32 code)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(vimc_deb_pix_map_list); i++)
if (vimc_deb_pix_map_list[i].code == code)
return &vimc_deb_pix_map_list[i];
return NULL;
}
static int vimc_deb_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg)
{
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *mf;
unsigned int i;
mf = v4l2_subdev_get_try_format(sd, cfg, 0);
*mf = sink_fmt_default;
for (i = 1; i < sd->entity.num_pads; i++) {
mf = v4l2_subdev_get_try_format(sd, cfg, i);
*mf = sink_fmt_default;
mf->code = vdeb->src_code;
}
return 0;
}
static int vimc_deb_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
/* We only support one format for source pads */
if (IS_SRC(code->pad)) {
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
if (code->index)
return -EINVAL;
code->code = vdeb->src_code;
} else {
if (code->index >= ARRAY_SIZE(vimc_deb_pix_map_list))
return -EINVAL;
code->code = vimc_deb_pix_map_list[code->index].code;
}
return 0;
}
static int vimc_deb_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
if (fse->index)
return -EINVAL;
if (IS_SINK(fse->pad)) {
const struct vimc_deb_pix_map *vpix =
vimc_deb_pix_map_by_code(fse->code);
if (!vpix)
return -EINVAL;
} else if (fse->code != vdeb->src_code) {
return -EINVAL;
}
fse->min_width = VIMC_FRAME_MIN_WIDTH;
fse->max_width = VIMC_FRAME_MAX_WIDTH;
fse->min_height = VIMC_FRAME_MIN_HEIGHT;
fse->max_height = VIMC_FRAME_MAX_HEIGHT;
return 0;
}
static int vimc_deb_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
/* Get the current sink format */
fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
*v4l2_subdev_get_try_format(sd, cfg, 0) :
vdeb->sink_fmt;
/* Set the right code for the source pad */
if (IS_SRC(fmt->pad))
fmt->format.code = vdeb->src_code;
return 0;
}
static void vimc_deb_adjust_sink_fmt(struct v4l2_mbus_framefmt *fmt)
{
const struct vimc_deb_pix_map *vpix;
/* Don't accept a code that is not on the debayer table */
vpix = vimc_deb_pix_map_by_code(fmt->code);
if (!vpix)
fmt->code = sink_fmt_default.code;
fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
VIMC_FRAME_MAX_WIDTH) & ~1;
fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
VIMC_FRAME_MAX_HEIGHT) & ~1;
if (fmt->field == V4L2_FIELD_ANY)
fmt->field = sink_fmt_default.field;
vimc_colorimetry_clamp(fmt);
}
static int vimc_deb_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *sink_fmt;
if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
/* Do not change the format while stream is on */
if (vdeb->src_frame)
return -EBUSY;
sink_fmt = &vdeb->sink_fmt;
} else {
sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
}
/*
* Do not change the format of the source pad,
* it is propagated from the sink
*/
if (IS_SRC(fmt->pad)) {
fmt->format = *sink_fmt;
/* TODO: Add support for other formats */
fmt->format.code = vdeb->src_code;
} else {
/* Set the new format in the sink pad */
vimc_deb_adjust_sink_fmt(&fmt->format);
dev_dbg(vdeb->dev, "%s: sink format update: "
"old:%dx%d (0x%x, %d, %d, %d, %d) "
"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vdeb->sd.name,
/* old */
sink_fmt->width, sink_fmt->height, sink_fmt->code,
sink_fmt->colorspace, sink_fmt->quantization,
sink_fmt->xfer_func, sink_fmt->ycbcr_enc,
/* new */
fmt->format.width, fmt->format.height, fmt->format.code,
fmt->format.colorspace, fmt->format.quantization,
fmt->format.xfer_func, fmt->format.ycbcr_enc);
*sink_fmt = fmt->format;
}
return 0;
}
static const struct v4l2_subdev_pad_ops vimc_deb_pad_ops = {
.init_cfg = vimc_deb_init_cfg,
.enum_mbus_code = vimc_deb_enum_mbus_code,
.enum_frame_size = vimc_deb_enum_frame_size,
.get_fmt = vimc_deb_get_fmt,
.set_fmt = vimc_deb_set_fmt,
};
static void vimc_deb_set_rgb_mbus_fmt_rgb888_1x24(struct vimc_deb_device *vdeb,
unsigned int lin,
unsigned int col,
unsigned int rgb[3])
{
unsigned int i, index;
index = VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 3);
for (i = 0; i < 3; i++)
vdeb->src_frame[index + i] = rgb[i];
}
static int vimc_deb_s_stream(struct v4l2_subdev *sd, int enable)
{
struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
int ret;
if (enable) {
const struct vimc_pix_map *vpix;
unsigned int frame_size;
if (vdeb->src_frame)
return 0;
/* Calculate the frame size of the source pad */
vpix = vimc_pix_map_by_code(vdeb->src_code);
frame_size = vdeb->sink_fmt.width * vdeb->sink_fmt.height *
vpix->bpp;
/* Save the bytes per pixel of the sink */
vpix = vimc_pix_map_by_code(vdeb->sink_fmt.code);
vdeb->sink_bpp = vpix->bpp;
/* Get the corresponding pixel map from the table */
vdeb->sink_pix_map =
vimc_deb_pix_map_by_code(vdeb->sink_fmt.code);
/*
* Allocate the frame buffer. Use vmalloc to be able to
* allocate a large amount of memory
*/
vdeb->src_frame = vmalloc(frame_size);
if (!vdeb->src_frame)
return -ENOMEM;
/* Turn the stream on in the subdevices directly connected */
ret = vimc_pipeline_s_stream(&vdeb->sd.entity, 1);
if (ret) {
vfree(vdeb->src_frame);
vdeb->src_frame = NULL;
return ret;
}
} else {
if (!vdeb->src_frame)
return 0;
/* Disable streaming from the pipe */
ret = vimc_pipeline_s_stream(&vdeb->sd.entity, 0);
if (ret)
return ret;
vfree(vdeb->src_frame);
vdeb->src_frame = NULL;
}
return 0;
}
static struct v4l2_subdev_video_ops vimc_deb_video_ops = {
.s_stream = vimc_deb_s_stream,
};
static const struct v4l2_subdev_ops vimc_deb_ops = {
.pad = &vimc_deb_pad_ops,
.video = &vimc_deb_video_ops,
};
static unsigned int vimc_deb_get_val(const u8 *bytes,
const unsigned int n_bytes)
{
unsigned int i;
unsigned int acc = 0;
for (i = 0; i < n_bytes; i++)
acc = acc + (bytes[i] << (8 * i));
return acc;
}
static void vimc_deb_calc_rgb_sink(struct vimc_deb_device *vdeb,
const u8 *frame,
const unsigned int lin,
const unsigned int col,
unsigned int rgb[3])
{
unsigned int i, seek, wlin, wcol;
unsigned int n_rgb[3] = {0, 0, 0};
for (i = 0; i < 3; i++)
rgb[i] = 0;
/*
* Calculate how many we need to subtract to get to the pixel in
* the top left corner of the mean window (considering the current
* pixel as the center)
*/
seek = deb_mean_win_size / 2;
/* Sum the values of the colors in the mean window */
dev_dbg(vdeb->dev,
"deb: %s: --- Calc pixel %dx%d, window mean %d, seek %d ---\n",
vdeb->sd.name, lin, col, vdeb->sink_fmt.height, seek);
/*
* Iterate through all the lines in the mean window, start
* with zero if the pixel is outside the frame and don't pass
* the height when the pixel is in the bottom border of the
* frame
*/
for (wlin = seek > lin ? 0 : lin - seek;
wlin < lin + seek + 1 && wlin < vdeb->sink_fmt.height;
wlin++) {
/*
* Iterate through all the columns in the mean window, start
* with zero if the pixel is outside the frame and don't pass
* the width when the pixel is in the right border of the
* frame
*/
for (wcol = seek > col ? 0 : col - seek;
wcol < col + seek + 1 && wcol < vdeb->sink_fmt.width;
wcol++) {
enum vimc_deb_rgb_colors color;
unsigned int index;
/* Check which color this pixel is */
color = vdeb->sink_pix_map->order[wlin % 2][wcol % 2];
index = VIMC_FRAME_INDEX(wlin, wcol,
vdeb->sink_fmt.width,
vdeb->sink_bpp);
dev_dbg(vdeb->dev,
"deb: %s: RGB CALC: frame index %d, win pos %dx%d, color %d\n",
vdeb->sd.name, index, wlin, wcol, color);
/* Get its value */
rgb[color] = rgb[color] +
vimc_deb_get_val(&frame[index], vdeb->sink_bpp);
/* Save how many values we already added */
n_rgb[color]++;
dev_dbg(vdeb->dev, "deb: %s: RGB CALC: val %d, n %d\n",
vdeb->sd.name, rgb[color], n_rgb[color]);
}
}
/* Calculate the mean */
for (i = 0; i < 3; i++) {
dev_dbg(vdeb->dev,
"deb: %s: PRE CALC: %dx%d Color %d, val %d, n %d\n",
vdeb->sd.name, lin, col, i, rgb[i], n_rgb[i]);
if (n_rgb[i])
rgb[i] = rgb[i] / n_rgb[i];
dev_dbg(vdeb->dev,
"deb: %s: FINAL CALC: %dx%d Color %d, val %d\n",
vdeb->sd.name, lin, col, i, rgb[i]);
}
}
static void vimc_deb_process_frame(struct vimc_ent_device *ved,
struct media_pad *sink,
const void *sink_frame)
{
struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
ved);
unsigned int rgb[3];
unsigned int i, j;
/* If the stream in this node is not active, just return */
if (!vdeb->src_frame)
return;
for (i = 0; i < vdeb->sink_fmt.height; i++)
for (j = 0; j < vdeb->sink_fmt.width; j++) {
vimc_deb_calc_rgb_sink(vdeb, sink_frame, i, j, rgb);
vdeb->set_rgb_src(vdeb, i, j, rgb);
}
/* Propagate the frame through all source pads */
for (i = 1; i < vdeb->sd.entity.num_pads; i++) {
struct media_pad *pad = &vdeb->sd.entity.pads[i];
vimc_propagate_frame(pad, vdeb->src_frame);
}
}
static void vimc_deb_comp_unbind(struct device *comp, struct device *master,
void *master_data)
{
struct vimc_ent_device *ved = dev_get_drvdata(comp);
struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
ved);
vimc_ent_sd_unregister(ved, &vdeb->sd);
kfree(vdeb);
}
static int vimc_deb_comp_bind(struct device *comp, struct device *master,
void *master_data)
{
struct v4l2_device *v4l2_dev = master_data;
struct vimc_platform_data *pdata = comp->platform_data;
struct vimc_deb_device *vdeb;
int ret;
/* Allocate the vdeb struct */
vdeb = kzalloc(sizeof(*vdeb), GFP_KERNEL);
if (!vdeb)
return -ENOMEM;
/* Initialize ved and sd */
ret = vimc_ent_sd_register(&vdeb->ved, &vdeb->sd, v4l2_dev,
pdata->entity_name,
MEDIA_ENT_F_ATV_DECODER, 2,
(const unsigned long[2]) {MEDIA_PAD_FL_SINK,
MEDIA_PAD_FL_SOURCE},
&vimc_deb_ops);
if (ret) {
kfree(vdeb);
return ret;
}
vdeb->ved.process_frame = vimc_deb_process_frame;
dev_set_drvdata(comp, &vdeb->ved);
vdeb->dev = comp;
/* Initialize the frame format */
vdeb->sink_fmt = sink_fmt_default;
/*
* TODO: Add support for more output formats, we only support
* RGB888 for now
* NOTE: the src format is always the same as the sink, except
* for the code
*/
vdeb->src_code = MEDIA_BUS_FMT_RGB888_1X24;
vdeb->set_rgb_src = vimc_deb_set_rgb_mbus_fmt_rgb888_1x24;
return 0;
}
static const struct component_ops vimc_deb_comp_ops = {
.bind = vimc_deb_comp_bind,
.unbind = vimc_deb_comp_unbind,
};
static int vimc_deb_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vimc_deb_comp_ops);
}
static int vimc_deb_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vimc_deb_comp_ops);
return 0;
}
media: vimc: set id_table for platform drivers The vimc platform drivers define a platform device ID table but these are not set to the .id_table field in the platform driver structure. So the platform device ID table is only used to fill the aliases in the module but are not used for matching (works because the platform subsystem fallbacks to the driver's name if no .id_table is set). But this also means that the platform device ID table isn't used if the driver is built-in, which leads to the following build warning: This causes the following build warnings when the driver is built-in: drivers/media/platform/vimc//vimc-capture.c:528:40: warning: ‘vimc_cap_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_cap_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ drivers/media/platform/vimc//vimc-debayer.c:588:40: warning: ‘vimc_deb_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_deb_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ drivers/media/platform/vimc//vimc-scaler.c:442:40: warning: ‘vimc_sca_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_sca_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ drivers/media/platform/vimc//vimc-sensor.c:376:40: warning: ‘vimc_sen_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_sen_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ Reported-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Suggested-by: Sakari Ailus <sakari.ailus@iki.fi> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Helen Koike <helen.koike@collabora.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-07-14 16:58:39 +08:00
static const struct platform_device_id vimc_deb_driver_ids[] = {
{
.name = VIMC_DEB_DRV_NAME,
},
{ }
};
static struct platform_driver vimc_deb_pdrv = {
.probe = vimc_deb_probe,
.remove = vimc_deb_remove,
media: vimc: set id_table for platform drivers The vimc platform drivers define a platform device ID table but these are not set to the .id_table field in the platform driver structure. So the platform device ID table is only used to fill the aliases in the module but are not used for matching (works because the platform subsystem fallbacks to the driver's name if no .id_table is set). But this also means that the platform device ID table isn't used if the driver is built-in, which leads to the following build warning: This causes the following build warnings when the driver is built-in: drivers/media/platform/vimc//vimc-capture.c:528:40: warning: ‘vimc_cap_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_cap_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ drivers/media/platform/vimc//vimc-debayer.c:588:40: warning: ‘vimc_deb_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_deb_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ drivers/media/platform/vimc//vimc-scaler.c:442:40: warning: ‘vimc_sca_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_sca_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ drivers/media/platform/vimc//vimc-sensor.c:376:40: warning: ‘vimc_sen_driver_ids’ defined but not used [-Wunused-const-variable=] static const struct platform_device_id vimc_sen_driver_ids[] = { ^~~~~~~~~~~~~~~~~~~ Reported-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Suggested-by: Sakari Ailus <sakari.ailus@iki.fi> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Helen Koike <helen.koike@collabora.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-07-14 16:58:39 +08:00
.id_table = vimc_deb_driver_ids,
.driver = {
.name = VIMC_DEB_DRV_NAME,
},
};
module_platform_driver(vimc_deb_pdrv);
MODULE_DEVICE_TABLE(platform, vimc_deb_driver_ids);
MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Debayer");
MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
MODULE_LICENSE("GPL");