[Public]
This series is
Reviewed-by: Yifan Zhang
-Original Message-
From: amd-gfx On Behalf Of Alex Deucher
Sent: Thursday, February 9, 2023 10:12 PM
To: amd-gfx@lists.freedesktop.org
Cc: Deucher, Alexander
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
---
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
