bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: expose additional modifier for DCN32/321

Browse Source 
[Why&How]
Some userspace expect a backwards compatible modifier on DCN32/321. For
hardware with num_pipes more than 16, we expose the most efficient
modifier first. As a fall back method, we need to expose slightly inefficient
modifier AMD_FMT_MOD_TILE_GFX9_64K_R_X after the best option.

Also set the number of packers to fixed value as required per hardware
documentation. This value is cached during hardware initialization and
can be read through the base driver.

Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Aurabindo Pillai
2022-06-28 16:25:28 -04:00
committed by Alex Deucher
parent 7268f0a9e8
commit ff15cea338
2 changed files with 30 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
View File

@@ -744,8 +744,7 @@ static int convert_tiling_flags_to_modifier(struct amdgpu_framebuffer *afb)
switch (version) {
case AMD_FMT_MOD_TILE_VER_GFX11:
pipe_xor_bits = min(block_size_bits - 8, pipes);
packers = min(block_size_bits - 8 - pipe_xor_bits,
ilog2(adev->gfx.config.gb_addr_config_fields.num_pkrs));
packers = ilog2(adev->gfx.config.gb_addr_config_fields.num_pkrs);
break;
case AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS:
pipe_xor_bits = min(block_size_bits - 8, pipes);