On 4/8/2022 10:47 AM, Limonciello, Mario wrote:
[Public]
-----Original Message-----
From: Gong, Richard <Richard.Gong@xxxxxxx>
Sent: Friday, April 8, 2022 10:45
To: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Koenig, Christian
<Christian.Koenig@xxxxxxx>; Pan, Xinhui <Xinhui.Pan@xxxxxxx>;
airlied@xxxxxxxx; daniel@xxxxxxxx
Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx; linux-
kernel@xxxxxxxxxxxxxxx; Limonciello, Mario <Mario.Limonciello@xxxxxxx>;
Gong, Richard <Richard.Gong@xxxxxxx>
Subject: [PATCH] drm/amdgpu: disable ASPM for legacy products that don't
support ASPM
Active State Power Management (ASPM) feature is enabled since kernel
5.14.
However there are some legacy products (WX3200 and RX640 are examples)
that
do not support ASPM. Use them as video/display output and system would
hang
during suspend/resume.
Add extra check to disable ASPM for old products that don't have
ASPM support.
Signed-off-by: Richard Gong <richard.gong@xxxxxxx>
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1885
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index bb1c025d9001..8987107f41ee 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2012,6 +2012,10 @@ static int amdgpu_pci_probe(struct pci_dev
*pdev,
if (amdgpu_aspm == -1 && !pcie_aspm_enabled(pdev))
amdgpu_aspm = 0;
+ /* disable ASPM for the legacy products that don't support ASPM */
+ if ((flags & AMD_ASIC_MASK) == CHIP_POLARIS12)
+ amdgpu_aspm = 0;
+
I think it's problematic to disable it for the entire driver. There might be multiple
AMDGPUs in the system, and others may support ASPM.
The "problem" are WX3200 and RX640, both are from the same POLARIS12 family.
Can it be done just as part of probe for Polaris?
if (amdgpu_virtual_display ||
amdgpu_device_asic_has_dc_support(flags & AMD_ASIC_MASK))
supports_atomic = true;
--
2.25.1
