This is a note to let you know that I've just added the patch titled drm/amd/display: fix dml prefetch validation to the 5.4-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-amd-display-fix-dml-prefetch-validation.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 11afb75ab9162c8c563c7e6dee20f0aeaecf31eb Author: Dmytro Laktyushkin <Dmytro.Laktyushkin@xxxxxxx> Date: Thu Mar 4 11:04:26 2021 -0500 drm/amd/display: fix dml prefetch validation [ Upstream commit 8ee0fea4baf90e43efe2275de208a7809f9985bc ] Incorrect variable used, missing initialization during validation. Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx> Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@xxxxxxx> Reviewed-by: Eric Bernstein <Eric.Bernstein@xxxxxxx> Acked-by: Solomon Chiu <solomon.chiu@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/dml/dcn20/display_mode_vba_20.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c index 6c6c486b774a..945d23ca3677 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c @@ -3435,6 +3435,7 @@ void dml20_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l mode_lib->vba.DCCEnabledInAnyPlane = true; } } + mode_lib->vba.UrgentLatency = mode_lib->vba.UrgentLatencyPixelDataOnly; for (i = 0; i <= mode_lib->vba.soc.num_states; i++) { locals->FabricAndDRAMBandwidthPerState[i] = dml_min( mode_lib->vba.DRAMSpeedPerState[i] * mode_lib->vba.NumberOfChannels diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c index 0fafd693ffb4..5b5ed1be19ba 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c @@ -3467,6 +3467,7 @@ void dml20v2_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode mode_lib->vba.DCCEnabledInAnyPlane = true; } } + mode_lib->vba.UrgentLatency = mode_lib->vba.UrgentLatencyPixelDataOnly; for (i = 0; i <= mode_lib->vba.soc.num_states; i++) { locals->FabricAndDRAMBandwidthPerState[i] = dml_min( mode_lib->vba.DRAMSpeedPerState[i] * mode_lib->vba.NumberOfChannels