This is a note to let you know that I've just added the patch titled drm/amdgpu/display: adjust msleep limit in dp_wait_for_training_aux_rd_interval to the 5.16-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amdgpu-display-adjust-msleep-limit-in-dp_wait_fo.patch and it can be found in the queue-5.16 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f966f45e2029648de831a63f9b6a21e84323a91c Author: Alex Deucher <alexander.deucher@xxxxxxx> Date: Thu Jan 20 12:52:13 2022 -0500 drm/amdgpu/display: adjust msleep limit in dp_wait_for_training_aux_rd_interval [ Upstream commit dc919d670c6fd1ac81ebf31625cd19579f7b3d4c ] Some architectures (e.g., ARM) have relatively low udelay limits. On most architectures, anything longer than 2000us is not recommended. Change the check to align with other similar checks in DC. Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index ccd6cdbe46f43..b97be2e9088ce 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -201,7 +201,7 @@ void dp_wait_for_training_aux_rd_interval( uint32_t wait_in_micro_secs) { #if defined(CONFIG_DRM_AMD_DC_DCN) - if (wait_in_micro_secs > 16000) + if (wait_in_micro_secs > 1000) msleep(wait_in_micro_secs/1000); else udelay(wait_in_micro_secs);