Unverified Commit 006ea1b5 authored by Dave Stevenson's avatar Dave Stevenson Committed by Maxime Ripard
Browse files

drm/fourcc: Add packed 10bit YUV 4:2:0 format 



Adds a format that is 3 10bit YUV 4:2:0 samples packed into
a 32bit word (with 2 spare bits).

Supported on Broadcom BCM2711 chips.

Signed-off-by: default avatarDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: default avatarMaxime Ripard <maxime@cerno.tech>
Acked-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20211215091739.135042-2-maxime@cerno.tech
parent 6ea966fc

drivers/gpu/drm/drm_fourcc.c

+3 −0
Original line number Diff line number Diff line
@@ -269,6 +269,9 @@ const struct drm_format_info *__drm_format_info(u32 format) 
		  .num_planes = 3, .char_per_block = { 2, 2, 2 },

		  .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0,

		  .vsub = 0, .is_yuv = true },

		{ .format = DRM_FORMAT_P030,            .depth = 0,  .num_planes = 2,

		  .char_per_block = { 4, 8, 0 }, .block_w = { 3, 3, 0 }, .block_h = { 1, 1, 0 },

		  .hsub = 2, .vsub = 2, .is_yuv = true},

	};



	unsigned int i;

include/uapi/drm/drm_fourcc.h

+11 −0
Original line number Diff line number Diff line
@@ -314,6 +314,13 @@ extern "C" { 
 */

#define DRM_FORMAT_P016		fourcc_code('P', '0', '1', '6') /* 2x2 subsampled Cr:Cb plane 16 bits per channel */



/* 2 plane YCbCr420.

 * 3 10 bit components and 2 padding bits packed into 4 bytes.

 * index 0 = Y plane, [31:0] x:Y2:Y1:Y0 2:10:10:10 little endian

 * index 1 = Cr:Cb plane, [63:0] x:Cr2:Cb2:Cr1:x:Cb1:Cr0:Cb0 [2:10:10:10:2:10:10:10] little endian

 */

#define DRM_FORMAT_P030		fourcc_code('P', '0', '3', '0') /* 2x2 subsampled Cr:Cb plane 10 bits per channel packed */



/* 3 plane non-subsampled (444) YCbCr

 * 16 bits per component, but only 10 bits are used and 6 bits are padded

 * index 0: Y plane, [15:0] Y:x [10:6] little endian
@@ -854,6 +861,10 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier) 
 * and UV.  Some SAND-using hardware stores UV in a separate tiled

 * image from Y to reduce the column height, which is not supported

 * with these modifiers.

 *

 * The DRM_FORMAT_MOD_BROADCOM_SAND128_COL_HEIGHT modifier is also

 * supported for DRM_FORMAT_P030 where the columns remain as 128 bytes

 * wide, but as this is a 10 bpp format that translates to 96 pixels.

 */



#define DRM_FORMAT_MOD_BROADCOM_SAND32_COL_HEIGHT(v) \