media: uapi: add MEDIA_BUS_FMT_BGR666_1X18

Add the BGR666 format MEDIA_BUS_FMT_BGR666_1X18 supported by the
RaspberryPi.
Signed-off-by: Joerg Quinten <aBUGSworstnightmare@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20221013-rpi-dpi-improvements-v3-2-eb76e26a772d@cerno.techSigned-off-by: Maxime Ripard <maxime@cerno.tech>

Documentation/userspace-api/media/v4l/subdev-formats.rst

@@ -949,6 +949,43 @@ The following tables list existing packed RGB formats.
       - b\ :sub:`2`
       - b\ :sub:`1`
       - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-BGR666-1X18:
+
+      - MEDIA_BUS_FMT_BGR666_1X18
+      - 0x1023
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
     * .. _MEDIA-BUS-FMT-RBG888-1X24:
 
       - MEDIA_BUS_FMT_RBG888_1X24

include/uapi/linux/media-bus-format.h

@@ -34,7 +34,7 @@
 
 #define MEDIA_BUS_FMT_FIXED			0x0001
 
-/* RGB - next is	0x1023 */
+/* RGB - next is	0x1024 */
 #define MEDIA_BUS_FMT_RGB444_1X12		0x1016
 #define MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE	0x1001
 #define MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE	0x1002
@@ -46,6 +46,7 @@
 #define MEDIA_BUS_FMT_RGB565_2X8_BE		0x1007
 #define MEDIA_BUS_FMT_RGB565_2X8_LE		0x1008
 #define MEDIA_BUS_FMT_RGB666_1X18		0x1009
+#define MEDIA_BUS_FMT_BGR666_1X18		0x1023
 #define MEDIA_BUS_FMT_RBG888_1X24		0x100e
 #define MEDIA_BUS_FMT_RGB666_1X24_CPADHI	0x1015
 #define MEDIA_BUS_FMT_RGB565_1X24_CPADHI	0x1022