drm: Redefine pixel formats

Name the formats as DRM_FORMAT_X instead of DRM_FOURCC_X. Use consistent
names, especially for the RGB formats. Component order and byte order are
now strictly specified for each format.

The RGB format naming follows a convention where the components names
and sizes are listed from left to right, matching the order within a
single pixel from most significant bit to least significant bit.

The YUV format names vary more. For the 4:2:2 packed formats and 2
plane formats use the fourcc. For the three plane formats the
name includes the plane order and subsampling information using the
standard subsampling notation. Some of those also happen to match
the official fourcc definition.

The fourccs for for all the RGB formats and some of the YUV formats
I invented myself. The idea was that looking at just the fourcc you
get some idea what the format is about without having to decode it
using some external reference.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 146 insertions, 50 deletions

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 07c80fd7a98d..1dfc28600751 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1923,28 +1923,28 @@ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
 
         switch (bpp) {
         case 8:
-                fmt = DRM_FOURCC_RGB332;
+                fmt = DRM_FORMAT_RGB332;
                 break;
         case 16:
                 if (depth == 15)
-                        fmt = DRM_FOURCC_RGB555;
+                        fmt = DRM_FORMAT_XRGB1555;
                 else
-                        fmt = DRM_FOURCC_RGB565;
+                        fmt = DRM_FORMAT_RGB565;
                 break;
         case 24:
-                fmt = DRM_FOURCC_RGB24;
+                fmt = DRM_FORMAT_RGB888;
                 break;
         case 32:
                 if (depth == 24)
-                        fmt = DRM_FOURCC_RGB24;
+                        fmt = DRM_FORMAT_XRGB8888;
                 else if (depth == 30)
-                        fmt = DRM_INTEL_RGB30;
+                        fmt = DRM_FORMAT_XRGB2101010;
                 else
-                        fmt = DRM_FOURCC_RGB32;
+                        fmt = DRM_FORMAT_ARGB8888;
                 break;
         default:
-                DRM_ERROR("bad bpp, assuming RGB24 pixel format\n");
-                fmt = DRM_FOURCC_RGB24;
+                DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
+                fmt = DRM_FORMAT_XRGB8888;
                 break;
         }
 
@@ -3145,27 +3145,54 @@ void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
                           int *bpp)
 {
         switch (format) {
-        case DRM_FOURCC_RGB332:
+        case DRM_FORMAT_RGB332:
+        case DRM_FORMAT_BGR233:
                 *depth = 8;
                 *bpp = 8;
                 break;
-        case DRM_FOURCC_RGB555:
+        case DRM_FORMAT_XRGB1555:
+        case DRM_FORMAT_XBGR1555:
+        case DRM_FORMAT_RGBX5551:
+        case DRM_FORMAT_BGRX5551:
+        case DRM_FORMAT_ARGB1555:
+        case DRM_FORMAT_ABGR1555:
+        case DRM_FORMAT_RGBA5551:
+        case DRM_FORMAT_BGRA5551:
                 *depth = 15;
                 *bpp = 16;
                 break;
-        case DRM_FOURCC_RGB565:
+        case DRM_FORMAT_RGB565:
+        case DRM_FORMAT_BGR565:
                 *depth = 16;
                 *bpp = 16;
                 break;
-        case DRM_FOURCC_RGB24:
+        case DRM_FORMAT_RGB888:
+        case DRM_FORMAT_BGR888:
+                *depth = 24;
+                *bpp = 24;
+                break;
+        case DRM_FORMAT_XRGB8888:
+        case DRM_FORMAT_XBGR8888:
+        case DRM_FORMAT_RGBX8888:
+        case DRM_FORMAT_BGRX8888:
                 *depth = 24;
                 *bpp = 32;
                 break;
-        case DRM_INTEL_RGB30:
+        case DRM_FORMAT_XRGB2101010:
+        case DRM_FORMAT_XBGR2101010:
+        case DRM_FORMAT_RGBX1010102:
+        case DRM_FORMAT_BGRX1010102:
+        case DRM_FORMAT_ARGB2101010:
+        case DRM_FORMAT_ABGR2101010:
+        case DRM_FORMAT_RGBA1010102:
+        case DRM_FORMAT_BGRA1010102:
                 *depth = 30;
                 *bpp = 32;
                 break;
-        case DRM_FOURCC_RGB32:
+        case DRM_FORMAT_ARGB8888:
+        case DRM_FORMAT_ABGR8888:
+        case DRM_FORMAT_RGBA8888:
+        case DRM_FORMAT_BGRA8888:
                 *depth = 32;
                 *bpp = 32;
                 break;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 50ae9157befe..0bc93c3cd447 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7585,16 +7585,18 @@ int intel_framebuffer_init(struct drm_device *dev,
                 return -EINVAL;
 
         switch (mode_cmd->pixel_format) {
-        case DRM_FOURCC_RGB332:
-        case DRM_FOURCC_RGB565:
-        case DRM_FOURCC_RGB24:
-        case DRM_INTEL_RGB30:
+        case DRM_FORMAT_RGB332:
+        case DRM_FORMAT_RGB565:
+        case DRM_FORMAT_XRGB8888:
+        case DRM_FORMAT_ARGB8888:
+        case DRM_FORMAT_XRGB2101010:
+        case DRM_FORMAT_ARGB2101010:
                 /* RGB formats are common across chipsets */
                 break;
-        case DRM_FOURCC_YUYV:
-        case DRM_FOURCC_UYVY:
-        case DRM_FOURCC_YVYU:
-        case DRM_FOURCC_VYUY:
+        case DRM_FORMAT_YUYV:
+        case DRM_FORMAT_UYVY:
+        case DRM_FORMAT_YVYU:
+        case DRM_FORMAT_VYUY:
                 break;
         default:
                 DRM_ERROR("unsupported pixel format\n");
diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
index 48c3d107a8fa..bb75249bfbae 100644
--- a/include/drm/drm_fourcc.h
+++ b/include/drm/drm_fourcc.h
@@ -24,40 +24,107 @@
 #ifndef DRM_FOURCC_H
 #define DRM_FOURCC_H
 
-/*
- * We don't use the V4L header because
- * 1) the fourcc codes are well defined and trivial to construct
- * 2) we don't want user apps to have to pull in v4l headers just for fourcc
- * 3) the v4l fourcc codes are mixed up with a bunch of other code and are
- *    part of the v4l API, so changing them to something linux-generic isn't
- *    feasible
- *
- * So the below includes the fourcc codes used by the DRM and its drivers,
- * along with potential device specific codes.
- */
-
 #include <linux/types.h>
 
 #define fourcc_code(a,b,c,d) ((u32)(a) | ((u32)(b) << 8) | \
                               ((u32)(c) << 16) | ((u32)(d) << 24))
 
-/* RGB codes */
-#define DRM_FOURCC_RGB332 fourcc_code('R','G','B','1')
-#define DRM_FOURCC_RGB555 fourcc_code('R','G','B','O')
-#define DRM_FOURCC_RGB565 fourcc_code('R','G','B','P')
-#define DRM_FOURCC_RGB24  fourcc_code('R','G','B','3')
-#define DRM_FOURCC_RGB32  fourcc_code('R','G','B','4')
+#define DRM_FORMAT_BIG_ENDIAN (1<<31) /* format is big endian instead of little endian */
+
+/* color index */
+#define DRM_FORMAT_C8           fourcc_code('C', '8', ' ', ' ') /* [7:0] C */
+
+/* 8 bpp RGB */
+#define DRM_FORMAT_RGB332       fourcc_code('R', 'G', 'B', '8') /* [7:0] R:G:B 3:3:2 */
+#define DRM_FORMAT_BGR233       fourcc_code('B', 'G', 'R', '8') /* [7:0] B:G:R 2:3:3 */
+
+/* 16 bpp RGB */
+#define DRM_FORMAT_XRGB4444     fourcc_code('X', 'R', '1', '2') /* [15:0] x:R:G:B 4:4:4:4 little endian */
+#define DRM_FORMAT_XBGR4444     fourcc_code('X', 'B', '1', '2') /* [15:0] x:B:G:R 4:4:4:4 little endian */
+#define DRM_FORMAT_RGBX4444     fourcc_code('R', 'X', '1', '2') /* [15:0] R:G:B:x 4:4:4:4 little endian */
+#define DRM_FORMAT_BGRX4444     fourcc_code('B', 'X', '1', '2') /* [15:0] B:G:R:x 4:4:4:4 little endian */
+
+#define DRM_FORMAT_ARGB4444     fourcc_code('A', 'R', '1', '2') /* [15:0] A:R:G:B 4:4:4:4 little endian */
+#define DRM_FORMAT_ABGR4444     fourcc_code('A', 'B', '1', '2') /* [15:0] A:B:G:R 4:4:4:4 little endian */
+#define DRM_FORMAT_RGBA4444     fourcc_code('R', 'A', '1', '2') /* [15:0] R:G:B:A 4:4:4:4 little endian */
+#define DRM_FORMAT_BGRA4444     fourcc_code('B', 'A', '1', '2') /* [15:0] B:G:R:A 4:4:4:4 little endian */
+
+#define DRM_FORMAT_XRGB1555     fourcc_code('X', 'R', '1', '5') /* [15:0] x:R:G:B 1:5:5:5 little endian */
+#define DRM_FORMAT_XBGR1555     fourcc_code('X', 'B', '1', '5') /* [15:0] x:B:G:R 1:5:5:5 little endian */
+#define DRM_FORMAT_RGBX5551     fourcc_code('R', 'X', '1', '5') /* [15:0] R:G:B:x 5:5:5:1 little endian */
+#define DRM_FORMAT_BGRX5551     fourcc_code('B', 'X', '1', '5') /* [15:0] B:G:R:x 5:5:5:1 little endian */
+
+#define DRM_FORMAT_ARGB1555     fourcc_code('A', 'R', '1', '5') /* [15:0] A:R:G:B 1:5:5:5 little endian */
+#define DRM_FORMAT_ABGR1555     fourcc_code('A', 'B', '1', '5') /* [15:0] A:B:G:R 1:5:5:5 little endian */
+#define DRM_FORMAT_RGBA5551     fourcc_code('R', 'A', '1', '5') /* [15:0] R:G:B:A 5:5:5:1 little endian */
+#define DRM_FORMAT_BGRA5551     fourcc_code('B', 'A', '1', '5') /* [15:0] B:G:R:A 5:5:5:1 little endian */
+
+#define DRM_FORMAT_RGB565       fourcc_code('R', 'G', '1', '6') /* [15:0] R:G:B 5:6:5 little endian */
+#define DRM_FORMAT_BGR565       fourcc_code('B', 'G', '1', '6') /* [15:0] B:G:R 5:6:5 little endian */
 
-#define DRM_FOURCC_BGR24  fourcc_code('B','G','R','3')
-#define DRM_FOURCC_BGR32  fourcc_code('B','G','R','4')
+/* 24 bpp RGB */
+#define DRM_FORMAT_RGB888       fourcc_code('R', 'G', '2', '4') /* [23:0] R:G:B little endian */
+#define DRM_FORMAT_BGR888       fourcc_code('B', 'G', '2', '4') /* [23:0] B:G:R little endian */
 
-/* YUV codes */
-#define DRM_FOURCC_YUYV   fourcc_code('Y', 'U', 'Y', 'V')
-#define DRM_FOURCC_YVYU   fourcc_code('Y', 'V', 'Y', 'U')
-#define DRM_FOURCC_UYVY   fourcc_code('U', 'Y', 'V', 'Y')
-#define DRM_FOURCC_VYUY   fourcc_code('V', 'Y', 'U', 'Y')
+/* 32 bpp RGB */
+#define DRM_FORMAT_XRGB8888     fourcc_code('X', 'R', '2', '4') /* [31:0] x:R:G:B 8:8:8:8 little endian */
+#define DRM_FORMAT_XBGR8888     fourcc_code('X', 'B', '2', '4') /* [31:0] x:B:G:R 8:8:8:8 little endian */
+#define DRM_FORMAT_RGBX8888     fourcc_code('R', 'X', '2', '4') /* [31:0] R:G:B:x 8:8:8:8 little endian */
+#define DRM_FORMAT_BGRX8888     fourcc_code('B', 'X', '2', '4') /* [31:0] B:G:R:x 8:8:8:8 little endian */
 
-/* DRM specific codes */
-#define DRM_INTEL_RGB30   fourcc_code('R','G','B','0') /* RGB x:10:10:10 */
+#define DRM_FORMAT_ARGB8888     fourcc_code('A', 'R', '2', '4') /* [31:0] A:R:G:B 8:8:8:8 little endian */
+#define DRM_FORMAT_ABGR8888     fourcc_code('A', 'B', '2', '4') /* [31:0] A:B:G:R 8:8:8:8 little endian */
+#define DRM_FORMAT_RGBA8888     fourcc_code('R', 'A', '2', '4') /* [31:0] R:G:B:A 8:8:8:8 little endian */
+#define DRM_FORMAT_BGRA8888     fourcc_code('B', 'A', '2', '4') /* [31:0] B:G:R:A 8:8:8:8 little endian */
+
+#define DRM_FORMAT_XRGB2101010  fourcc_code('X', 'R', '3', '0') /* [31:0] x:R:G:B 2:10:10:10 little endian */
+#define DRM_FORMAT_XBGR2101010  fourcc_code('X', 'B', '3', '0') /* [31:0] x:B:G:R 2:10:10:10 little endian */
+#define DRM_FORMAT_RGBX1010102  fourcc_code('R', 'X', '3', '0') /* [31:0] R:G:B:x 10:10:10:2 little endian */
+#define DRM_FORMAT_BGRX1010102  fourcc_code('B', 'X', '3', '0') /* [31:0] B:G:R:x 10:10:10:2 little endian */
+
+#define DRM_FORMAT_ARGB2101010  fourcc_code('A', 'R', '3', '0') /* [31:0] A:R:G:B 2:10:10:10 little endian */
+#define DRM_FORMAT_ABGR2101010  fourcc_code('A', 'B', '3', '0') /* [31:0] A:B:G:R 2:10:10:10 little endian */
+#define DRM_FORMAT_RGBA1010102  fourcc_code('R', 'A', '3', '0') /* [31:0] R:G:B:A 10:10:10:2 little endian */
+#define DRM_FORMAT_BGRA1010102  fourcc_code('B', 'A', '3', '0') /* [31:0] B:G:R:A 10:10:10:2 little endian */
+
+/* packed YCbCr */
+#define DRM_FORMAT_YUYV         fourcc_code('Y', 'U', 'Y', 'V') /* [31:0] Cr0:Y1:Cb0:Y0 8:8:8:8 little endian */
+#define DRM_FORMAT_YVYU         fourcc_code('Y', 'V', 'Y', 'U') /* [31:0] Cb0:Y1:Cr0:Y0 8:8:8:8 little endian */
+#define DRM_FORMAT_UYVY         fourcc_code('U', 'Y', 'V', 'Y') /* [31:0] Y1:Cr0:Y0:Cb0 8:8:8:8 little endian */
+#define DRM_FORMAT_VYUY         fourcc_code('V', 'Y', 'U', 'Y') /* [31:0] Y1:Cb0:Y0:Cr0 8:8:8:8 little endian */
+
+#define DRM_FORMAT_AYUV         fourcc_code('A', 'Y', 'U', 'V') /* [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */
+
+/*
+ * 2 plane YCbCr
+ * index 0 = Y plane, [7:0] Y
+ * index 1 = Cr:Cb plane, [15:0] Cr:Cb little endian
+ * or
+ * index 1 = Cb:Cr plane, [15:0] Cb:Cr little endian
+ */
+#define DRM_FORMAT_NV12         fourcc_code('N', 'V', '1', '2') /* 2x2 subsampled Cr:Cb plane */
+#define DRM_FORMAT_NV21         fourcc_code('N', 'V', '2', '1') /* 2x2 subsampled Cb:Cr plane */
+#define DRM_FORMAT_NV16         fourcc_code('N', 'V', '1', '6') /* 2x1 subsampled Cr:Cb plane */
+#define DRM_FORMAT_NV61         fourcc_code('N', 'V', '6', '1') /* 2x1 subsampled Cb:Cr plane */
+
+/*
+ * 3 plane YCbCr
+ * index 0: Y plane, [7:0] Y
+ * index 1: Cb plane, [7:0] Cb
+ * index 2: Cr plane, [7:0] Cr
+ * or
+ * index 1: Cr plane, [7:0] Cr
+ * index 2: Cb plane, [7:0] Cb
+ */
+#define DRM_FORMAT_YUV410       fourcc_code('Y', 'U', 'V', '9') /* 4x4 subsampled Cb (1) and Cr (2) planes */
+#define DRM_FORMAT_YVU410       fourcc_code('Y', 'V', 'U', '9') /* 4x4 subsampled Cr (1) and Cb (2) planes */
+#define DRM_FORMAT_YUV411       fourcc_code('Y', 'U', '1', '1') /* 4x1 subsampled Cb (1) and Cr (2) planes */
+#define DRM_FORMAT_YVU411       fourcc_code('Y', 'V', '1', '1') /* 4x1 subsampled Cr (1) and Cb (2) planes */
+#define DRM_FORMAT_YUV420       fourcc_code('Y', 'U', '1', '2') /* 2x2 subsampled Cb (1) and Cr (2) planes */
+#define DRM_FORMAT_YVU420       fourcc_code('Y', 'V', '1', '2') /* 2x2 subsampled Cr (1) and Cb (2) planes */
+#define DRM_FORMAT_YUV422       fourcc_code('Y', 'U', '1', '6') /* 2x1 subsampled Cb (1) and Cr (2) planes */
+#define DRM_FORMAT_YVU422       fourcc_code('Y', 'V', '1', '6') /* 2x1 subsampled Cr (1) and Cb (2) planes */
+#define DRM_FORMAT_YUV444       fourcc_code('Y', 'U', '2', '4') /* non-subsampled Cb (1) and Cr (2) planes */
+#define DRM_FORMAT_YVU444       fourcc_code('Y', 'V', '2', '4') /* non-subsampled Cr (1) and Cb (2) planes */
 
 #endif /* DRM_FOURCC_H */