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

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[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>

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Aurabindo Pillai 2022-06-28 16:25:28 -04:00 • committed by Alex Deucher

parent 7268f0a9e8

commit ff15cea338

2 changed files with 36 additions and 33 deletions

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3

drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

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54

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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