From: Richard Gong <richard.gong@amd.com>
To: <alexander.deucher@amd.com>, <christian.koenig@amd.com>,
<xinhui.pan@amd.com>, <airlied@linux.ie>, <daniel@ffwll.ch>
Cc: <amd-gfx@lists.freedesktop.org>,
<dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
<mario.limonciello@amd.com>, <richard.gong@amd.com>,
kernel test robot <lkp@intel.com>
Subject: [PATCHv4] drm/amdgpu: disable ASPM on Intel Alder Lake based systems
Date: Tue, 12 Apr 2022 16:50:00 -0500 [thread overview]
Message-ID: <20220412215000.897344-1-richard.gong@amd.com> (raw)
Active State Power Management (ASPM) feature is enabled since kernel 5.14.
There are some AMD GFX cards (such as WX3200 and RX640) that won't work
with ASPM-enabled Intel Alder Lake based systems. Using these GFX cards as
video/display output, Intel Alder Lake based systems will hang during
suspend/resume.
The issue was initially reported on one system (Dell Precision 3660 with
BIOS version 0.14.81), but was later confirmed to affect at least 4 Alder
Lake based systems.
Add extra check to disable ASPM on Intel Alder Lake based systems.
Fixes: 0064b0ce85bb ("drm/amd/pm: enable ASPM by default")
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1885
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Richard Gong <richard.gong@amd.com>
---
v4: s/CONFIG_X86_64/CONFIG_X86
enhanced check logic
v3: s/intel_core_asom_chk/aspm_support_quirk_check
correct build error with W=1 option
v2: correct commit description
move the check from chip family to problematic platform
---
drivers/gpu/drm/amd/amdgpu/vi.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c
index 039b90cdc3bc..b33e0a9bee65 100644
--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -81,6 +81,10 @@
#include "mxgpu_vi.h"
#include "amdgpu_dm.h"
+#if IS_ENABLED(CONFIG_X86)
+#include <asm/intel-family.h>
+#endif
+
#define ixPCIE_LC_L1_PM_SUBSTATE 0x100100C6
#define PCIE_LC_L1_PM_SUBSTATE__LC_L1_SUBSTATES_OVERRIDE_EN_MASK 0x00000001L
#define PCIE_LC_L1_PM_SUBSTATE__LC_PCI_PM_L1_2_OVERRIDE_MASK 0x00000002L
@@ -1134,13 +1138,24 @@ static void vi_enable_aspm(struct amdgpu_device *adev)
WREG32_PCIE(ixPCIE_LC_CNTL, data);
}
+static bool aspm_support_quirk_check(void)
+{
+ if (IS_ENABLED(CONFIG_X86)) {
+ struct cpuinfo_x86 *c = &cpu_data(0);
+
+ return !(c->x86 == 6 && c->x86_model == INTEL_FAM6_ALDERLAKE);
+ }
+
+ return true;
+}
+
static void vi_program_aspm(struct amdgpu_device *adev)
{
u32 data, data1, orig;
bool bL1SS = false;
bool bClkReqSupport = true;
- if (!amdgpu_device_should_use_aspm(adev))
+ if (!amdgpu_device_should_use_aspm(adev) || !aspm_support_quirk_check())
return;
if (adev->flags & AMD_IS_APU ||
--
2.25.1
next reply other threads:[~2022-04-12 23:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-12 21:50 Richard Gong [this message]
2022-04-13 4:29 ` [PATCHv4] drm/amdgpu: disable ASPM on Intel Alder Lake based systems Lazar, Lijo
2022-04-13 7:43 ` Paul Menzel
2022-04-13 13:00 ` Alex Deucher
2022-04-13 13:28 ` Limonciello, Mario
2022-04-14 7:52 ` Paul Menzel
2022-04-14 13:11 ` Alex Deucher
[not found] ` <94fd858d-1792-9c05-b5c6-1b028427687d@amd.com>
2022-04-20 20:29 ` Paul Menzel
2022-04-20 20:40 ` Alex Deucher
2022-04-20 20:48 ` Paul Menzel
2022-04-20 20:56 ` Gong, Richard
2022-04-20 21:02 ` Paul Menzel
2022-04-20 21:12 ` Gong, Richard
2022-04-20 21:15 ` Alex Deucher
2022-04-20 21:13 ` Alex Deucher
2022-04-20 21:16 ` Limonciello, Mario
2022-04-21 1:12 ` Gong, Richard
2022-04-21 5:35 ` Paul Menzel
2022-04-26 13:53 ` Gong, Richard
2022-05-01 7:08 ` Paul Menzel
2022-05-02 14:56 ` Gong, Richard
2022-05-03 12:25 ` Daniel Stone
2022-05-03 12:44 ` Paul Menzel
2022-04-13 15:40 ` Nathan Chancellor
2022-04-19 21:08 ` Gong, Richard
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