From: Alvin Lee <alvin.l...@amd.com>
[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.l...@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
Acked-by: Eryk Brol <eryk.b...@amd.com>
---
drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 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 08da423b24a1..033ace4be445 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
@@ -404,15 +404,16 @@ 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;
- /**
- * 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) {
+ /**
+ * 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);
+ dmub->hw_funcs.backdoor_load(dmub, &cw0, &cw1);
+ }
- if (params->load_inst_const && dmub->hw_funcs.backdoor_load)
- dmub->hw_funcs.backdoor_load(dmub, &cw0, &cw1);
}
if (dmub->hw_funcs.reset)
--
2.25.1
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
