[PATCH] marvell-ccic: fix RGB444 format

[PATCH] marvell-ccic: fix RGB444 format

[Hans Verkuil]

The RGB444 format swapped the red and blue components, fix this.

Rather than making a new BGR444 format (as I proposed initially), Jon prefers
to just fix this and return the colors in the right order. I think that makes
sense in this case.

Since the RGB444 pixel format is deprecated due to the ambiguous specification
of the alpha component we use the XRGB444 pixel format instead (specified as having
no alpha channel).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
---
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c
index 3c12065..cc92ba5 100644
--- a/drivers/media/platform/marvell-ccic/mcam-core.c
+++ b/drivers/media/platform/marvell-ccic/mcam-core.c
@@ -138,8 +138,8 @@ static struct mcam_format_struct {
 		.planar		= true,
 	},
 	{
-		.desc		= "RGB 444",
-		.pixelformat	= V4L2_PIX_FMT_RGB444,
+		.desc		= "XRGB 444",
+		.pixelformat	= V4L2_PIX_FMT_XRGB444,
 		.mbus_code	= MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 		.bpp		= 2,
 		.planar		= false,
@@ -777,10 +777,9 @@ static void mcam_ctlr_image(struct mcam_camera *cam)
 		mcam_reg_write_mask(cam, REG_CTRL0,
 			C0_DF_YUV | C0_YUV_PACKED | C0_YUVE_SWAP24, C0_DF_MASK);
 		break;
-	case V4L2_PIX_FMT_RGB444:
+	case V4L2_PIX_FMT_XRGB444:
 		mcam_reg_write_mask(cam, REG_CTRL0,
-			C0_DF_RGB | C0_RGBF_444 | C0_RGB4_XRGB, C0_DF_MASK);
-		/* Alpha value? */
+			C0_DF_RGB | C0_RGBF_444 | C0_RGB4_XBGR, C0_DF_MASK);
 		break;
 	case V4L2_PIX_FMT_RGB565:
 		mcam_reg_write_mask(cam, REG_CTRL0,

Re: [PATCH] marvell-ccic: fix RGB444 format

[Jonathan Corbet]

On Fri, 24 Apr 2015 11:52:47 +0200
Hans Verkuil <hverkuil@xs4all.nl> wrote:

> The RGB444 format swapped the red and blue components, fix this.
> 
> Rather than making a new BGR444 format (as I proposed initially), Jon prefers
> to just fix this and return the colors in the right order. I think that makes
> sense in this case.
> 
> Since the RGB444 pixel format is deprecated due to the ambiguous specification
> of the alpha component we use the XRGB444 pixel format instead (specified as having
> no alpha channel).

Seems good to me.

Acked-by: Jonathan Corbet <corbet@lwn.net>

jon