media: vimc: cap: Report a colorspace

The colorspace reported by a video nodes should not be
V4L2_COLORSPACE_DEFAULT. Instead a default colorspace should be picked
by the driver if V4L2_COLORSPACE_DEFAULT is given by userspace to
{G,S,TRY}_FMT.

The colorspace V4L2_COLORSPACE_SRGB is arbitrary chosen as the vimc
default format to report as it's used for most webcams.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/test-drivers/vimc/vimc-capture.c

@@ -37,7 +37,7 @@ static const struct v4l2_pix_format fmt_default = {
 	.height = 480,
 	.pixelformat = V4L2_PIX_FMT_RGB24,
 	.field = V4L2_FIELD_NONE,
-	.colorspace = V4L2_COLORSPACE_DEFAULT,
+	.colorspace = V4L2_COLORSPACE_SRGB,
 };
 
 struct vimc_cap_buffer {
@@ -107,6 +107,9 @@ static int vimc_cap_try_fmt_vid_cap(struct file *file, void *priv,
 
 	vimc_colorimetry_clamp(format);
 
+	if (format->colorspace == V4L2_COLORSPACE_DEFAULT)
+		format->colorspace = fmt_default.colorspace;
+
 	return 0;
 }
 

drivers/media/test-drivers/vimc/vimc-debayer.c

@@ -48,7 +48,7 @@ static const struct v4l2_mbus_framefmt sink_fmt_default = {
 	.height = 480,
 	.code = MEDIA_BUS_FMT_SRGGB8_1X8,
 	.field = V4L2_FIELD_NONE,
-	.colorspace = V4L2_COLORSPACE_DEFAULT,
+	.colorspace = V4L2_COLORSPACE_SRGB,
 };
 
 static const struct vimc_deb_pix_map vimc_deb_pix_map_list[] = {

drivers/media/test-drivers/vimc/vimc-scaler.c

@@ -42,7 +42,7 @@ static const struct v4l2_mbus_framefmt sink_fmt_default = {
 	.height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
 	.code = MEDIA_BUS_FMT_RGB888_1X24,
 	.field = V4L2_FIELD_NONE,
-	.colorspace = V4L2_COLORSPACE_DEFAULT,
+	.colorspace = V4L2_COLORSPACE_SRGB,
 };
 
 static const struct v4l2_rect crop_rect_default = {

drivers/media/test-drivers/vimc/vimc-sensor.c

@@ -30,7 +30,7 @@ static const struct v4l2_mbus_framefmt fmt_default = {
 	.height = 480,
 	.code = MEDIA_BUS_FMT_RGB888_1X24,
 	.field = V4L2_FIELD_NONE,
-	.colorspace = V4L2_COLORSPACE_DEFAULT,
+	.colorspace = V4L2_COLORSPACE_SRGB,
 };
 
 static int vimc_sen_init_cfg(struct v4l2_subdev *sd,