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 <redacted>

---

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 | 15 +++++++++++++++
 1 file changed, 15 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..16bc3eaad0ff 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 +411,15 @@ 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) {
+			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;