drm/amd/display: Only flush inst_fb if backdoor loading (9485af4e) · Commits · 戴 / test

[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:

drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

+9 −8

Original line number	Diff line number	Diff line
		@@ -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);