From fa9bdb7a504b5ee4e0e26dfc54cce1f960a3cbba Mon Sep 17 00:00:00 2001 From: Oliver Logush <oliver.logush@amd.com> Date: Tue, 22 Mar 2022 10:26:19 -0400 Subject: [PATCH] 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> --- .../drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c index 8161a6ae410d0..30c6f9cd717f3 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c @@ -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); -- GitLab