Commit c1b972a1 authored Mar 22, 2022 by Oliver Logush Committed by Alex Deucher Apr 12, 2022

drm/amd/display: Insert pulling smu busy status before sending another request



[why]
Make sure smu is not busy before sending another request, this is to
prevent stress failures from MS.

[how]
Check to make sure the SMU fw busy signal is cleared before sending
another request

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: Oliver Logush <oliver.logush@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 593692d2

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -94,6 +94,9 @@ static int rn_vbios_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr,
		{
		uint32_t result;

		result = rn_smu_wait_for_response(clk_mgr, 10, 200000);
		ASSERT(result == VBIOSSMC_Result_OK);

		/* First clear response register */
		REG_WRITE(MP1_SMN_C2PMSG_91, VBIOSSMC_Status_BUSY);