gpu: ipu-v3: add support for XRGB32 and XBGR32 V4L2 pixel formats

These should be used instead of the ill-defined deprecated RGB32 and
BGR32 V4L2 pixel formats.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/gpu/ipu-v3/ipu-common.c

@@ -122,6 +122,8 @@ enum ipu_color_space ipu_pixelformat_to_colorspace(u32 pixelformat)
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV61:
 		return IPUV3_COLORSPACE_YUV;
+	case V4L2_PIX_FMT_XRGB32:
+	case V4L2_PIX_FMT_XBGR32:
 	case V4L2_PIX_FMT_RGB32:
 	case V4L2_PIX_FMT_BGR32:
 	case V4L2_PIX_FMT_RGB24:
@@ -190,6 +192,8 @@ int ipu_stride_to_bytes(u32 pixel_stride, u32 pixelformat)
 		return (24 * pixel_stride) >> 3;
 	case V4L2_PIX_FMT_BGR32:
 	case V4L2_PIX_FMT_RGB32:
+	case V4L2_PIX_FMT_XBGR32:
+	case V4L2_PIX_FMT_XRGB32:
 		return (32 * pixel_stride) >> 3;
 	default:
 		break;

drivers/gpu/ipu-v3/ipu-cpmem.c

@@ -188,6 +188,12 @@ static int v4l2_pix_fmt_to_drm_fourcc(u32 pixelformat)
 	case V4L2_PIX_FMT_RGB32:
 		/* R G B A <=> [32:0] A:B:G:R */
 		return DRM_FORMAT_XBGR8888;
+	case V4L2_PIX_FMT_XBGR32:
+		/* B G R X <=> [32:0] X:R:G:B */
+		return DRM_FORMAT_XRGB8888;
+	case V4L2_PIX_FMT_XRGB32:
+		/* X R G B <=> [32:0] B:G:R:X */
+		return DRM_FORMAT_BGRX8888;
 	case V4L2_PIX_FMT_UYVY:
 		return DRM_FORMAT_UYVY;
 	case V4L2_PIX_FMT_YUYV:
@@ -787,6 +793,8 @@ int ipu_cpmem_set_image(struct ipuv3_channel *ch, struct ipu_image *image)
 		break;
 	case V4L2_PIX_FMT_RGB32:
 	case V4L2_PIX_FMT_BGR32:
+	case V4L2_PIX_FMT_XRGB32:
+	case V4L2_PIX_FMT_XBGR32:
 		offset = image->rect.left * 4 +
 			image->rect.top * pix->bytesperline;
 		break;

drivers/gpu/ipu-v3/ipu-image-convert.c

@@ -226,6 +226,12 @@ static const struct ipu_image_pixfmt image_convert_formats[] = {
 	}, {
 		.fourcc	= V4L2_PIX_FMT_BGR32,
 		.bpp    = 32,
+	}, {
+		.fourcc	= V4L2_PIX_FMT_XRGB32,
+		.bpp    = 32,
+	}, {
+		.fourcc	= V4L2_PIX_FMT_XBGR32,
+		.bpp    = 32,
 	}, {
 		.fourcc	= V4L2_PIX_FMT_YUYV,
 		.bpp    = 16,