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drm/amd/display: Only flush inst_fb if backdoor loading

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[Why]
DAL resume from BACO time is longer if we always flush inst_fb

[How]
Check if backdoor loading to flush inst_fb

Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alvin Lee
2020-09-26 12:46:34 -04:00
committed by Alex Deucher
parent 480c5b8ff8
commit 9485af4e4d
1 changed files with 9 additions and 8 deletions
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5
drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
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@@ -418,17 +418,18 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub,
cw1.region.base = DMUB_CW1_BASE;
cw1.region.top = cw1.region.base + stack_fb->size - 1;
if (params->load_inst_const && dmub->hw_funcs.backdoor_load) {
/**
* Read back all the instruction memory so we don't hang the
* 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->load_inst_const && dmub->hw_funcs.backdoor_load)
dmub->hw_funcs.backdoor_load(dmub, &cw0, &cw1);
}
}
if (dmub->hw_funcs.reset)
dmub->hw_funcs.reset(dmub);