[PATCH libdrm 2/3] drm_fourcc: Add DRM_FORMAT_C[124]

[Geert Uytterhoeven]

Add fourcc codes for color-indexed frame buffer formats with two, four,
and sixteen colors.  Add support for creating buffers using these
formats.

Signed-off-by: Geert Uytterhoeven <geert at linux-m68k.org>
---
 include/drm/drm_fourcc.h |  5 ++++-
 tests/modetest/buffers.c | 15 +++++++++++++++
 tests/util/format.c      |  3 +++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
index 957c7be29239c0a1..f8b18d28a71dabff 100644
--- a/include/drm/drm_fourcc.h
+++ b/include/drm/drm_fourcc.h
@@ -99,7 +99,10 @@ extern "C" {
 #define DRM_FORMAT_INVALID	0
 
 /* color index */
-#define DRM_FORMAT_C8		fourcc_code('C', '8', ' ', ' ') /* [7:0] C */
+#define DRM_FORMAT_C1		fourcc_code('C', '1', ' ', ' ') /* [7:0] C0:C1:C2:C3:C4:C5:C6:C7 1:1:1:1:1:1:1:1 eight pixels/byte */
+#define DRM_FORMAT_C2		fourcc_code('C', '2', ' ', ' ') /* [7:0] C0:C1:C2:C3 2:2:2:2 four pixels/byte */
+#define DRM_FORMAT_C4		fourcc_code('C', '4', ' ', ' ') /* [7:0] C0:C1 4:4 two pixels/byte */
+#define DRM_FORMAT_C8		fourcc_code('C', '8', ' ', ' ') /* [7:0] C 8 one pixel/byte */
 
 /* 8 bpp Red */
 #define DRM_FORMAT_R8		fourcc_code('R', '8', ' ', ' ') /* [7:0] R */
diff --git a/tests/modetest/buffers.c b/tests/modetest/buffers.c
index 8a8d9e0143474378..af7f60b4fb4d09ad 100644
--- a/tests/modetest/buffers.c
+++ b/tests/modetest/buffers.c
@@ -135,6 +135,18 @@ bo_create(int fd, unsigned int format,
 	int ret;
 
 	switch (format) {
+	case DRM_FORMAT_C1:
+		bpp = 1;
+		break;
+
+	case DRM_FORMAT_C2:
+		bpp = 2;
+		break;
+
+	case DRM_FORMAT_C4:
+		bpp = 4;
+		break;
+
 	case DRM_FORMAT_C8:
 	case DRM_FORMAT_NV12:
 	case DRM_FORMAT_NV21:
@@ -283,6 +295,9 @@ bo_create(int fd, unsigned int format,
 		planes[2] = virtual + offsets[2];
 		break;
 
+	case DRM_FORMAT_C1:
+	case DRM_FORMAT_C2:
+	case DRM_FORMAT_C4:
 	case DRM_FORMAT_C8:
 	case DRM_FORMAT_ARGB4444:
 	case DRM_FORMAT_XRGB4444:
diff --git a/tests/util/format.c b/tests/util/format.c
index 1ca1b82ce947b2f4..4b984af9bce8ac6f 100644
--- a/tests/util/format.c
+++ b/tests/util/format.c
@@ -40,6 +40,9 @@
 
 static const struct util_format_info format_info[] = {
 	/* Indexed */
+	{ DRM_FORMAT_C1, "C1" },
+	{ DRM_FORMAT_C2, "C2" },
+	{ DRM_FORMAT_C4, "C4" },
 	{ DRM_FORMAT_C8, "C8" },
 	/* YUV packed */
 	{ DRM_FORMAT_UYVY, "UYVY", MAKE_YUV_INFO(YUV_YCbCr | YUV_CY, 2, 2, 2) },
-- 
2.25.1