From: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
The media documentation says that the V4L2_COLORSPACE_SMPTE170M colorspace
should be used for SDTV and V4L2_COLORSPACE_REC709 for HDTV. But drivers
don't agree on the display resolution that should be used as a threshold.
Some drivers set V4L2_COLORSPACE_REC709 for 720p and higher while others
set V4L2_COLORSPACE_REC709 for anything higher than 576p. Newers drivers
use the latter and that also matches what user-space multimedia programs
do (i.e: GStreamer), so change the driver logic to be aligned with this.
Also, check for the resolution in G_FMT instead unconditionally setting
the V4L2_COLORSPACE_REC709 colorspace.
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Signed-off-by: Thibault Saunier <thibault.saunier@xxxxxxxxxxxxxxx>
---
Changes in v3:
- Do not check values in the g_fmt functions as Andrzej explained in previous review
- Added 'Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>'
Changes in v2: None
drivers/media/platform/exynos-gsc/gsc-core.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index 59a634201830..db7d9883861b 100644
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c
@@ -472,7 +472,7 @@ int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
pix_mp->num_planes = fmt->num_planes;
- if (pix_mp->width >= 1280) /* HD */
+ if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
pix_mp->colorspace = V4L2_COLORSPACE_REC709;
else /* SD */
pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
@@ -519,9 +519,13 @@ int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
pix_mp->height = frame->f_height;
pix_mp->field = V4L2_FIELD_NONE;
pix_mp->pixelformat = frame->fmt->pixelformat;
- pix_mp->colorspace = V4L2_COLORSPACE_REC709;
pix_mp->num_planes = frame->fmt->num_planes;
+ if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+ pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+ else /* SD */
+ pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+
for (i = 0; i < pix_mp->num_planes; ++i) {
pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
frame->fmt->depth[i]) / 8;
--
2.11.1
--
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