From: Alvin Lee <alvin.lee2@xxxxxxx> When waiting for the ACK for INBOX0 message, we have to ensure to include the udelay for proper wait time Cc: stable@xxxxxxxxxxxxxxx # 6.1+ Reviewed-by: Samson Tam <samson.tam@xxxxxxx> Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx> Signed-off-by: Alvin Lee <alvin.lee2@xxxxxxx> --- drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 1 + 1 file changed, 1 insertion(+) 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 22fc4ba96def..38360adc53d9 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -1077,6 +1077,7 @@ enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t ti ack = dmub->hw_funcs.read_inbox0_ack_register(dmub); if (ack) return DMUB_STATUS_OK; + udelay(1); } return DMUB_STATUS_TIMEOUT; } -- 2.42.0
