drm/amdgpu: Match against exact bootloader status

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[ Upstream commit d3de41ee5f ]

On PSP v13.x ASICs, boot loader will set only the MSB to 1 and clear the
least significant bits for any command submission. Hence match against
the exact register value, otherwise a register value of all 0xFFs also
could falsely indicate that boot loader is ready. Also, from PSP v13.0.6
and newer, bits[7:0] will be used to indicate command error status.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Lijo Lazar 2023-07-25 19:11:54 +05:30 • committed by Greg Kroah-Hartman

parent f20bee49dc

commit 5251c83532

1 changed files with 8 additions and 7 deletions

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drivers/gpu/drm/amd/amdgpu/psp_v13_0.c

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