linux_dsm_epyc7002/drivers/gpu/drm/amd
Nicholas Kazlauskas dee5d54283 drm/amd/display: Read inst_fb data back during DMUB loading
[Why]
The inst firmware isn't necessarily fully flushed to framebuffer
memory and the DMCUB can hang due to invalid inst being parsed.

[How]
Like the fix to flush ringbuffer commands before updating the inbox
write pointer we need to read back inst memory before writing the
CW0 registers.

Add a helper to read 64-byte chunks to avoid a large temporary buffer.
Read the remaining leftover bytes if the inst_fb isn't fully aligned.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-01-16 13:46:13 -05:00
..
acp drm/amdgpu: fix license on Kconfig and Makefiles 2019-12-11 15:22:08 -05:00
amdgpu drm/amdgpu: add arcturus to gpu recovery check code path 2020-01-16 13:40:54 -05:00
amdkfd drm/amdkfd: Add a message when SW scheduler is used 2020-01-16 13:38:07 -05:00
display drm/amd/display: Read inst_fb data back during DMUB loading 2020-01-16 13:46:13 -05:00
include drm/amd/include: Add OCSC registers 2020-01-16 13:41:06 -05:00
powerplay drm/amdgpu/sriov skip the update of SMU_TABLE_ACTIVITY_MONITOR_COEFF 2020-01-16 13:35:45 -05:00