drm/fourcc: Add fourcc for Mali linear tiled formats

Mali-DP implements a number of tiled yuv formats which are not
currently described in drm_fourcc.h.
This adds those definitions and describes their memory layout by
using the newly added char_per_block, block_w, block_h.

Reviewed-by: Brian Starkey <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
Signed-off-by: Alexandru Gheorghe <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_fourcc.c

···
 		{ .format = DRM_FORMAT_UYVY,		.depth = 0,  .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
 		{ .format = DRM_FORMAT_VYUY,		.depth = 0,  .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
 		{ .format = DRM_FORMAT_AYUV,		.depth = 0,  .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
+		{ .format = DRM_FORMAT_Y0L0,		.depth = 0,  .num_planes = 1,
+		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
+		  .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true },
+		{ .format = DRM_FORMAT_X0L0,		.depth = 0,  .num_planes = 1,
+		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
+		  .hsub = 2, .vsub = 2, .is_yuv = true },
+		{ .format = DRM_FORMAT_Y0L2,		.depth = 0,  .num_planes = 1,
+		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
+		  .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true },
+		{ .format = DRM_FORMAT_X0L2,		.depth = 0,  .num_planes = 1,
+		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
+		  .hsub = 2, .vsub = 2, .is_yuv = true },
 	};
 
 	unsigned int i;

include/uapi/drm/drm_fourcc.h

···
 #define DRM_FORMAT_AYUV		fourcc_code('A', 'Y', 'U', 'V') /* [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */
 
 /*
+ * packed YCbCr420 2x2 tiled formats
+ * first 64 bits will contain Y,Cb,Cr components for a 2x2 tile
+ */
+/* [63:0]   A3:A2:Y3:0:Cr0:0:Y2:0:A1:A0:Y1:0:Cb0:0:Y0:0  1:1:8:2:8:2:8:2:1:1:8:2:8:2:8:2 little endian */
+#define DRM_FORMAT_Y0L0		fourcc_code('Y', '0', 'L', '0')
+/* [63:0]   X3:X2:Y3:0:Cr0:0:Y2:0:X1:X0:Y1:0:Cb0:0:Y0:0  1:1:8:2:8:2:8:2:1:1:8:2:8:2:8:2 little endian */
+#define DRM_FORMAT_X0L0		fourcc_code('X', '0', 'L', '0')
+
+/* [63:0]   A3:A2:Y3:Cr0:Y2:A1:A0:Y1:Cb0:Y0  1:1:10:10:10:1:1:10:10:10 little endian */
+#define DRM_FORMAT_Y0L2		fourcc_code('Y', '0', 'L', '2')
+/* [63:0]   X3:X2:Y3:Cr0:Y2:X1:X0:Y1:Cb0:Y0  1:1:10:10:10:1:1:10:10:10 little endian */
+#define DRM_FORMAT_X0L2		fourcc_code('X', '0', 'L', '2')
+
+/*
  * 2 plane RGB + A
  * index 0 = RGB plane, same format as the corresponding non _A8 format has
  * index 1 = A plane, [7:0] A