linux-kernel - [PATCH v2 3/4] [media] s5p-mfc: Set colorspace in VIDIO_{G,TRY}

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Message-Id: <20170209200420.3046-4-thibault.saunier@osg.samsung.com>
Date:   Thu,  9 Feb 2017 17:04:19 -0300
From:   Thibault Saunier <thibault.saunier@....samsung.com>
To:     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>,
        Thibault Saunier <thibault.saunier@....samsung.com>
Subject: [PATCH v2 3/4] [media] s5p-mfc: Set colorspace in VIDIO_{G,TRY}_FMT

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, also respect usespace setting.

Use 576p display resolution as a threshold to set this.

Signed-off-by: Thibault Saunier <thibault.saunier@....samsung.com>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 19 +++++++++++++++++++
 1 file changed, 19 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..960d6c7052bd 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -354,6 +354,15 @@ 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->colorspace != V4L2_COLORSPACE_REC709 &&
+			pix_mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
+			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;
+		}
 	} else if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 		/* This is run on OUTPUT
 		   The buffer contains compressed image
@@ -378,6 +387,7 @@ 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 +415,15 @@ 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_REC709 &&
+			pix_mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
+			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