From bb9a037cafa91918c2ece823591d1d04b812ae17 Mon Sep 17 00:00:00 2001 From: Richard Gong Date: Fri, 8 Apr 2022 14:05:02 -0500 Subject: [PATCH] drm/amdgpu: disable ASPM on Intel AlderLake based systems Active State Power Management (ASPM) feature is enabled since kernel 5.14. There are some AMD GFX cards (such as WX3200 and RX640) that cannot be used with Intel AlderLake based systems to enable ASPM. Using these GFX cards as video/display output, Intel Alder Lake based systems will hang during suspend/resume. Add extra check to disable ASPM on Intel AlderLake based systems. Fixes: 0064b0ce85bb ("drm/amd/pm: enable ASPM by default") Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1885 Signed-off-by: Richard Gong --- 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 039b90cdc3bcac..8b4eaf54b23e87 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_64) +#include +#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 intel_core_apsm_chk(void) +{ +#if IS_ENABLED(CONFIG_X86_64) + struct cpuinfo_x86 *c = &cpu_data(0); + + return (c->x86 == 6 && c->x86_model == INTEL_FAM6_ALDERLAKE); +#else + return false; +#endif +} + 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) || intel_core_apsm_chk()) return; if (adev->flags & AMD_IS_APU ||