[PATCH v5 2/3] [media] s5p-mfc: Set colorspace in VIDIO_{G,TRY}_FMT if DEFAULT provided

From: Thibault Saunier <thibault.saunier@osg.samsung.com>
To: linux-kernel@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Kukjin Kim <kgene@kernel.org>,
	Mauro Carvalho Chehab <mchehab@s-opensource.com>,
	Nicolas Dufresne <nicolas.dufresne@collabora.com>,
	Andi Shyti <andi.shyti@samsung.com>,
	linux-media@vger.kernel.org, Shuah Khan <shuahkh@osg.samsung.com>,
	Javier Martinez Canillas <javier@osg.samsung.com>,
	linux-samsung-soc@vger.kernel.org,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Inki Dae <inki.dae@samsung.com>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Thibault Saunier <thibault.saunier@osg.samsung.com>,
	linux-arm-kernel@lists.infradead.org,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Jeongtae Park <jtp.park@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Kamil Debski <kamil@wypas.org>
Subject: [PATCH v5 2/3] [media] s5p-mfc: Set colorspace in VIDIO_{G,TRY}_FMT if DEFAULT provided
Date: Tue, 21 Feb 2017 16:20:58 -0300	[thread overview]
Message-ID: <20170221192059.29745-3-thibault.saunier@osg.samsung.com> (raw)
In-Reply-To: <20170221192059.29745-1-thibault.saunier@osg.samsung.com>

The media documentation says that the V4L2_COLORSPACE_SMPTE170M colorspace
should be used for SDTV and V4L2_COLORSPACE_REC709 for HDTV but the driver
didn't set the colorimetry when userspace provided
V4L2_COLORSPACE_DEFAULT.

Use 576p display resolution as a threshold to set this as suggested by
EIA CEA 861B.

Signed-off-by: Thibault Saunier <thibault.saunier@osg.samsung.com>

---

Changes in v5: None
Changes in v4:
- Set the colorspace only if the user passed V4L2_COLORSPACE_DEFAULT, in
  all other cases just use what userspace provided.

Changes in v3:
- Do not check values in the g_fmt functions as Andrzej explained in previous review
- Set colorspace if user passed V4L2_COLORSPACE_DEFAULT in

Changes in v2: None

 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 367ef8e8dbf0..0976c3e0a5ce 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -354,6 +354,11 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		pix_mp->plane_fmt[0].sizeimage = ctx->luma_size;
 		pix_mp->plane_fmt[1].bytesperline = ctx->buf_width;
 		pix_mp->plane_fmt[1].sizeimage = ctx->chroma_size;
+
+		if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+			pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+		else /* SD */
+			pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
 	} else if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 		/* This is run on OUTPUT
 		   The buffer contains compressed image
@@ -378,6 +383,7 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 {
 	struct s5p_mfc_dev *dev = video_drvdata(file);
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 	struct s5p_mfc_fmt *fmt;
 
 	mfc_debug(2, "Type is %d\n", f->type);
@@ -405,6 +411,14 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 			mfc_err("Unsupported format by this MFC version.\n");
 			return -EINVAL;
 		}
+
+		if (pix_mp->colorspace == V4L2_COLORSPACE_DEFAULT) {
+			if (pix_mp->width > 720 &&
+					pix_mp->height > 576) /* HD */
+				pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+			else /* SD */
+				pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+		}
 	}
 
 	return 0;
-- 
2.11.1
