diff options
| author | Dillon Varone <dillon.varone@amd.com> | 2023-08-04 16:55:26 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-08-30 15:37:18 -0400 |
| commit | 5e77c339a291776b88dcf1dd3e18955d0341dd5d (patch) | |
| tree | 66905e2c227e74c1bab9af4980da291ee55fcb34 /drivers/gpu/drm/amd/display/dmub/src | |
| parent | d12f00c91fdfe3e50747f9e7e229fd8ede16b632 (diff) | |
drm/amd/display: Skip dmub memory flush when not needed
[WHY&HOW]
Readback is only necessary when loaded via CPU.
Reviewed-by: Chris Park <chris.park@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dmub/src')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c index 53464c3e49c17..d7d142c5b06a9 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -564,7 +564,8 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub, * DMCUB when backdoor loading if the write from x86 hasn't been * flushed yet. This only occurs in backdoor loading. */ - dmub_flush_buffer_mem(inst_fb); + if (params->mem_access_type == DMUB_MEMORY_ACCESS_CPU) + dmub_flush_buffer_mem(inst_fb); if (params->fw_in_system_memory && dmub->hw_funcs.backdoor_load_zfb_mode) dmub->hw_funcs.backdoor_load_zfb_mode(dmub, &cw0, &cw1); |