6.6-stable review patch. If anyone has any objections, please let me know.
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From: Alvin Lee alvin.lee2@amd.com
commit 3c9ea68cb61bd7e5bd312c06a12adada74ff5805 upstream.
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 Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -997,6 +997,7 @@ enum dmub_status dmub_srv_wait_for_inbox ack = dmub->hw_funcs.read_inbox0_ack_register(dmub); if (ack) return DMUB_STATUS_OK; + udelay(1); } return DMUB_STATUS_TIMEOUT; }