On 02/09/2015 06:03 PM, Daniel Vetter wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> To be used from the new addfb2 extension. v2: - Drop Intel-specific untiled modfier. - Move to drm_fourcc.h. - Document layouts a bit and denote them as platform-specific and not useable for cross-driver sharing. - Add Y-tiling for completeness. - Drop special docstring markers to avoid confusing kerneldoc. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx> (v2) --- drivers/gpu/drm/i915/i915_drv.h | 1 + include/uapi/drm/drm_fourcc.h | 31 +++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 217845951b7f..a027a983c82b 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -31,6 +31,7 @@ #define _I915_DRV_H_ #include <uapi/drm/i915_drm.h> +#include <uapi/drm/drm_fourcc.h> #include "i915_reg.h" #include "intel_bios.h" diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index 622109677747..886814c6f9d2 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -164,4 +164,35 @@ * authoritative source for all of these. */ +/* Intel framebuffer modifiers */ + +/* + * Intel X-tiling layout + * + * This is a tiled layout using 4Kb tiles (except on gen2 where the tiles 2Kb) + * in row-major layout. Within the tile bytes are laid out row-major, with + * a platform-dependent stride. On top of that the memory can apply + * platform-depending swizzling of some higher address bits into bit6. + * + * This format is highly platforms specific and not useful for cross-driver + * sharing. It exists since on a given platform it does uniquely identify the + * layout in a simple way for i915-specific userspace. + */ +#define I915_FORMAT_MOD_X_TILED fourcc_mod_code(INTEL, 1) + +/* + * Intel Y-tiling layout + * + * This is a tiled layout using 4Kb tiles (except on gen2 where the tiles 2Kb) + * in row-major layout. Within the tile bytes are laid out in OWORD (16 bytes) + * chunks column-major, with a platform-dependent height. On top of that the + * memory can apply platform-depending swizzling of some higher address bits + * into bit6. + * + * This format is highly platforms specific and not useful for cross-driver + * sharing. It exists since on a given platform it does uniquely identify the + * layout in a simple way for i915-specific userspace. + */ +#define I915_FORMAT_MOD_Y_TILED fourcc_mod_code(INTEL, 1)
X was one, so this could be two. Regards, Tvrtko _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
