From: Alvin Lee alvin.lee2@amd.com

When waiting for the ACK for INBOX0 message, we have to ensure to include the udelay for proper wait time

Cc: stable@vger.kernel.org # 6.1+ Reviewed-by: Samson Tam samson.tam@amd.com Acked-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Alvin Lee alvin.lee2@amd.com --- 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; }