linux-kernel - [PATCH 1/1] subsystem drm: add fourcc for 16bit buffers

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Date:   Sun, 20 Nov 2016 12:58:45 +0100
From:   Rainer Hochecker <fernetmenta@...i.tv>
To:     linux-kernel@...r.kernel.org
Cc:     airlied@...ux.ie, daniel.vetter@...ll.ch,
        Rainer Hochecker <fernetmenta@...ine.de>
Subject: [PATCH 1/1] subsystem drm: add fourcc for 16bit buffers

From: Rainer Hochecker <fernetmenta@...ine.de>

In order to expose 16-bit dma buffers to Mesa, additional codes are required.
R16 and RG16 are already defined by OpenGL.

Motivation: allow CreateImageKHR to map 16 bit buffers created by VAAPI

Signed-off-by: Rainer Hochecker <fernetmenta@...ine.de>
---
 include/uapi/drm/drm_fourcc.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index a5890bf..2505bc8 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -41,10 +41,16 @@ extern "C" {
 /* 8 bpp Red */
 #define DRM_FORMAT_R8		fourcc_code('R', '8', ' ', ' ') /* [7:0] R */
 
+/* 16 bpp Red */
+#define DRM_FORMAT_R16		fourcc_code('R', '1', '6', ' ') /* [15:0] R */
+
 /* 16 bpp RG */
 #define DRM_FORMAT_RG88		fourcc_code('R', 'G', '8', '8') /* [15:0] R:G 8:8 little endian */
 #define DRM_FORMAT_GR88		fourcc_code('G', 'R', '8', '8') /* [15:0] G:R 8:8 little endian */
 
+/* 32 bpp RG */
+#define DRM_FORMAT_RG16		fourcc_code('R', 'G', '1', '6') /* [31:0] R:G 16:16 little endian */
+
 /* 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 */
-- 
2.7.4