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.
derived from kernel patch: https://patchwork.kernel.org/patch/10449533/
Signed-off-by: Tanmay Shah tanmay@codeaurora.org --- include/drm/drm_fourcc.h | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index e04613d..85c6fe1 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -298,6 +298,19 @@ extern "C" { */ #define DRM_FORMAT_MOD_SAMSUNG_64_32_TILE fourcc_mod_code(SAMSUNG, 1)
+/* + * MSM compressed format + * + * Refers to the compressed variant of a base format. + * 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) + /* Vivante framebuffer modifiers */
/*