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Date: Fri, 10 Feb 2017 07:58:41 +0100 From: Andrzej Hajda <a.hajda@...sung.com> To: Thibault Saunier <thibault.saunier@....samsung.com>, linux-kernel@...r.kernel.org Cc: Mauro Carvalho Chehab <mchehab@...pensource.com>, Andi Shyti <andi.shyti@...sung.com>, Shuah Khan <shuahkh@....samsung.com>, Inki Dae <inki.dae@...sung.com>, Nicolas Dufresne <nicolas.dufresne@...labora.com>, Javier Martinez Canillas <javier@....samsung.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, Marek Szyprowski <m.szyprowski@...sung.com>, Kukjin Kim <kgene@...nel.org>, linux-samsung-soc@...r.kernel.org, Sylwester Nawrocki <s.nawrocki@...sung.com>, linux-media@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>, linux-arm-kernel@...ts.infradead.org, Ulf Hansson <ulf.hansson@...aro.org> Subject: Re: [PATCH v2 1/4] [media] exynos-gsc: Use 576p instead 720p as a threshold for colorspaces On 09.02.2017 21:04, Thibault Saunier wrote: > From: Javier Martinez Canillas <javier@....samsung.com> > > 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@....samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@...sung.com> -- Regards Andrzej > --- > drivers/media/platform/exynos-gsc/gsc-core.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c > index cbb03768f5d7..2beb43401987 100644 > --- a/drivers/media/platform/exynos-gsc/gsc-core.c > +++ b/drivers/media/platform/exynos-gsc/gsc-core.c > @@ -445,7 +445,7 @@ 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; > @@ -492,7 +492,10 @@ 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; > + if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */ > + pix_mp->colorspace = V4L2_COLORSPACE_REC709; > + else /* SD */ > + pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M; > pix_mp->num_planes = frame->fmt->num_planes; > > for (i = 0; i < pix_mp->num_planes; ++i) {
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