[Public] This series is Reviewed-by: Yifan Zhang <yifan1.zhang@xxxxxxx> -----Original Message----- From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Alex Deucher Sent: Thursday, February 9, 2023 10:12 PM To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx> Subject: [PATCH 4/4] Revert "drm/amd/display: disable S/G display on DCN 3.1.5" This reverts commit 3cc67fe1b3aa1ac4720e002f2aa2d08c9199a584. Some users have reported flickerng with S/G display. We've tried extensively to reproduce and debug the issue on a wide variety of platform configurations (DRAM bandwidth, etc.) and a variety of monitors, but so far have not been able to. We disabled S/G display on a number of platforms to address this but that leads to failure to pin framebuffers errors and blank displays when there is memory pressure or no displays at all on systems with limited carveout (e.g., Chromebooks). We have a parameter to disable this as a debugging option as a way for users to disable this, depending on their use case, and for us to help debug this further. Having this enabled seems like the lesser of to evils. Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index f7ba65fd8f48..7f16be84f3b1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1571,6 +1571,7 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) case IP_VERSION(3, 1, 2): case IP_VERSION(3, 1, 3): case IP_VERSION(3, 1, 4): + case IP_VERSION(3, 1, 5): case IP_VERSION(3, 1, 6): init_data.flags.gpu_vm_support = true; break; -- 2.39.1
