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

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[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>
This commit is contained in:
Oliver Logush 2022-03-22 10:26:19 -04:00 committed by Alex Deucher
parent 593692d2de
commit c1b972a18d
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c
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@ -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);