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drm/amd/display: Restore 5s vbl offdelay for NV3x+ DGPUs

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[Why]

Rapid vblank off is causing flip-done timeouts for NV3x and newer
family of GPUs that support more idle optimization features.

A proper fix requires further investigation. In lieu of it, let's
workaround it for now.

[How]

For NV3x and newer family of DGPUs, restore the old 5s vblank off timer.

Fixes: 9b47278cec ("drm/amd/display: temp w/a for dGPU to enter idle optimizations")
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3787
Link: https://lore.kernel.org/amd-gfx/20260217191632.1243826-1-sysdadmin@m1k.cloud/
Tested-by: Michele Palazzi <sysdadmin@m1k.cloud>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit df482c2d441b090161633566b7a0755f1bbd55c2)
This commit is contained in:
Leo Li
2026-04-22 12:29:56 -04:00
committed by Alex Deucher
parent 65bce27ea6
commit a1fc7bf667
1 changed files with 15 additions and 3 deletions
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18
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -9408,9 +9408,21 @@ static void manage_dm_interrupts(struct amdgpu_device *adev,
if (acrtc_state) {
timing = &acrtc_state->stream->timing;
if (amdgpu_ip_version(adev, DCE_HWIP, 0) <
IP_VERSION(3, 5, 0) ||
!(adev->flags & AMD_IS_APU)) {
if (amdgpu_ip_version(adev, DCE_HWIP, 0) >=
IP_VERSION(3, 2, 0) &&
!(adev->flags & AMD_IS_APU)) {
/*
* DGPUs NV3x and newer that support idle optimizations
* experience intermittent flip-done timeouts on cursor
* updates. Restore 5s offdelay behavior for now.
*
* Discussion on the issue:
* https://lore.kernel.org/amd-gfx/20260217191632.1243826-1-sysdadmin@m1k.cloud/
*/
config.offdelay_ms = 5000;
config.disable_immediate = false;
} else if (amdgpu_ip_version(adev, DCE_HWIP, 0) <
IP_VERSION(3, 5, 0)) {
/*
* Older HW and DGPU have issues with instant off;
* use a 2 frame offdelay.