media: v4l: Add packed YUV 4:4:4 YUVA and YUVX pixel formats

The new YUVA and YUVX are permutations of the existing AYUV and XYUV
formats. They are use by the NXP i.MX8 ISI hardware.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst

@@ -220,6 +220,26 @@ the second byte and Y'\ :sub:`7-0` in the third byte.
       - Y'\ :sub:`7-0`
       - X\ :sub:`7-0`
 
+    * .. _V4L2-PIX-FMT-YUVA32:
+
+      - ``V4L2_PIX_FMT_YUVA32``
+      - 'YUVA'
+
+      - Y'\ :sub:`7-0`
+      - Cb\ :sub:`7-0`
+      - Cr\ :sub:`7-0`
+      - A\ :sub:`7-0`
+
+    * .. _V4L2-PIX-FMT-YUVX32:
+
+      - ``V4L2_PIX_FMT_YUVX32``
+      - 'YUVX'
+
+      - Y'\ :sub:`7-0`
+      - Cb\ :sub:`7-0`
+      - Cr\ :sub:`7-0`
+      - X\ :sub:`7-0`
+
     * .. _V4L2-PIX-FMT-YUV24:
 
       - ``V4L2_PIX_FMT_YUV24``

drivers/media/v4l2-core/v4l2-ioctl.c

@@ -1296,6 +1296,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	case V4L2_PIX_FMT_XYUV32:	descr = "32-bit XYUV 8-8-8-8"; break;
 	case V4L2_PIX_FMT_VUYA32:	descr = "32-bit VUYA 8-8-8-8"; break;
 	case V4L2_PIX_FMT_VUYX32:	descr = "32-bit VUYX 8-8-8-8"; break;
+	case V4L2_PIX_FMT_YUVA32:	descr = "32-bit YUVA 8-8-8-8"; break;
+	case V4L2_PIX_FMT_YUVX32:	descr = "32-bit YUVX 8-8-8-8"; break;
 	case V4L2_PIX_FMT_YUV410:	descr = "Planar YUV 4:1:0"; break;
 	case V4L2_PIX_FMT_YUV420:	descr = "Planar YUV 4:2:0"; break;
 	case V4L2_PIX_FMT_HI240:	descr = "8-bit Dithered RGB (BTTV)"; break;

include/uapi/linux/videodev2.h

@@ -593,6 +593,8 @@ struct v4l2_pix_format {
 #define V4L2_PIX_FMT_XYUV32  v4l2_fourcc('X', 'Y', 'U', 'V') /* 32  XYUV-8-8-8-8  */
 #define V4L2_PIX_FMT_VUYA32  v4l2_fourcc('V', 'U', 'Y', 'A') /* 32  VUYA-8-8-8-8  */
 #define V4L2_PIX_FMT_VUYX32  v4l2_fourcc('V', 'U', 'Y', 'X') /* 32  VUYX-8-8-8-8  */
+#define V4L2_PIX_FMT_YUVA32  v4l2_fourcc('Y', 'U', 'V', 'A') /* 32  YUVA-8-8-8-8  */
+#define V4L2_PIX_FMT_YUVX32  v4l2_fourcc('Y', 'U', 'V', 'X') /* 32  YUVX-8-8-8-8  */
 #define V4L2_PIX_FMT_M420    v4l2_fourcc('M', '4', '2', '0') /* 12  YUV 4:2:0 2 lines y, 1 line uv interleaved */
 
 /* two planes -- one Y, one Cr + Cb interleaved  */