On 2018-07-25 07:09, Stanimir Varbanov wrote:
Hi,
On 07/20/2018 11:42 PM, Sean Paul wrote:
From: Jeykumar Sankaran <jsanka@xxxxxxxxxxxxxx>
Qualcomm Snapdragon chipsets uses compressed format
to optimize BW across multiple IP's. This change adds
needed modifier support in drm for a simple 4x4 tile
based compressed variants of base formats.
Changes in v3:
- Removed duplicate entry for DRM_FORMAT_MOD_QCOM_COMPRESSED (Rob
Clark)
Signed-off-by: Jeykumar Sankaran <jsanka@xxxxxxxxxxxxxx>
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
include/uapi/drm/drm_fourcc.h | 37
+++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/include/uapi/drm/drm_fourcc.h
b/include/uapi/drm/drm_fourcc.h
index e04613d30a13..1c9a6bf8c81e 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -298,6 +298,43 @@ extern "C" {
*/
#define DRM_FORMAT_MOD_SAMSUNG_64_32_TILE fourcc_mod_code(SAMSUNG, 1)
+/*
+ * Qualcomm Compressed Format
+ *
+ * Refers to a compressed variant of the base format that is
compressed.
+ * Implementation may be platform and base-format specific.
+ *
+ * Each macrotile consists of m x n (mostly 4 x 4) tiles.
+ * Pixel data pitch/stride is aligned with macrotile width.
+ * Pixel data height is aligned with macrotile height.
+ * Entire pixel data buffer is aligned with 4k(bytes).
+ */
+#define DRM_FORMAT_MOD_QCOM_COMPRESSED fourcc_mod_code(QCOM, 1)
+
+/*
+ * QTI DX Format
+ *
+ * Refers to a DX variant of the base format.
+ * Implementation may be platform and base-format specific.
+ */
+#define DRM_FORMAT_MOD_QCOM_DX fourcc_mod_code(QCOM, 0x2)
What DX stands for?
_DX is QCOM modifier for identifying 10bit version of NV12 format since
there is no fourcc_code for the same.
--
Jeykumar S
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