From: Nori, Sekhar <nsekhar@ti.com>
Date: Fri, 26 May 2017 10:55:27 +0000 (-0300)
Subject: [media] davinci: vpif_capture: fix default pixel format for BT.656/BT.1120 video
X-Git-Tag: v4.14-rc1~332^2~291
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8946ab3a4cb46abe0113a267857fdb32b05a3f23;p=platform%2Fkernel%2Flinux-rpi.git

[media] davinci: vpif_capture: fix default pixel format for BT.656/BT.1120 video

For both BT.656 and BT.1120 video, the pixel format
used by VPIF is Y/CbCr 4:2:2 in semi-planar format
(Luma in one plane and Chroma in another). This
corresponds to NV16 pixel format.

This is documented in section 36.2.3 of OMAP-L138
Technical Reference Manual, SPRUH77A.

The VPIF driver incorrectly sets the default format
to V4L2_PIX_FMT_YUV422P. Fix it.

Reported-by: Alejandro Hernandez <ajhernandez@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 44f7027..128e92d 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -513,7 +513,7 @@ static int vpif_update_std_info(struct channel_obj *ch)
 	if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
 		common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 	else
-		common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
+		common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_NV16;
 
 	common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 
@@ -917,8 +917,8 @@ static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
 		fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 	} else {
 		fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
-		fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
+		strcpy(fmt->description, "YCbCr4:2:2 Semi-Planar");
+		fmt->pixelformat = V4L2_PIX_FMT_NV16;
 	}
 	return 0;
 }
@@ -946,8 +946,8 @@ static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
 		if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8)
 			pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 	} else {
-		if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
-			pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
+		if (pixfmt->pixelformat != V4L2_PIX_FMT_NV16)
+			pixfmt->pixelformat = V4L2_PIX_FMT_NV16;
 	}
 
 	common->fmt.fmt.pix.pixelformat = pixfmt->pixelformat;