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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; Received: from SATLEXMB04.amd.com (165.204.84.17) by DM6NAM11FT051.mail.protection.outlook.com (10.13.172.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5206.12 via Frontend Transport; Fri, 29 Apr 2022 16:08:24 +0000 Received: from doryam3r2rack03-34.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 29 Apr 2022 11:08:23 -0500 From: Richard Gong To: , , , , CC: , , , , , kernel test robot Subject: [PATCHv5] drm/amdgpu: vi: disable ASPM on Intel Alder Lake based systems Date: Fri, 29 Apr 2022 11:06:04 -0500 Message-ID: <20220429160604.2608782-1-richard.gong@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 637091c2-d76d-4f28-542d-08da29fa7d0d X-MS-TrafficTypeDiagnostic: MN2PR12MB3167:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2022 16:08:24.1841 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 637091c2-d76d-4f28-542d-08da29fa7d0d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT051.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB3167 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Active State Power Management (ASPM) feature is enabled since kernel 5.14. There are some AMD Volcanic Islands (VI) GFX cards, such as the WX3200 and RX640, that do not work with ASPM-enabled Intel Alder Lake based systems. Using these GFX cards as video/display output, Intel Alder Lake based systems will freeze after suspend/resume. The issue was originally reported on one system (Dell Precision 3660 with BIOS version 0.14.81), but was later confirmed to affect at least 4 pre-production Alder Lake based systems. Add an extra check to disable ASPM on Intel Alder Lake based systems with the problematic AMD Volcanic Islands GFX cards. Fixes: 0064b0ce85bb ("drm/amd/pm: enable ASPM by default") Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1885 Reported-by: kernel test robot Signed-off-by: Richard Gong Reviewed-by: Alex Deucher Reviewed-by: Mario Limonciello --- v5: added vi to commit header and updated commit message rolled back guard with the preprocessor as did in v2 to correct build error on non-x86 systems v4: s/CONFIG_X86_64/CONFIG_X86 enhanced check logic v3: s/intel_core_aspm_chk/aspm_support_quirk_check correct build error with W=3D1 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/v= i.c index 039b90cdc3bc..45f0188c4273 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" =20 +#if IS_ENABLED(CONFIG_X86) +#include +#endif + #define ixPCIE_LC_L1_PM_SUBSTATE 0x100100C6 #define PCIE_LC_L1_PM_SUBSTATE__LC_L1_SUBSTATES_OVERRIDE_EN_MASK 0x0000000= 1L #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 *ad= ev) WREG32_PCIE(ixPCIE_LC_CNTL, data); } =20 +static bool aspm_support_quirk_check(void) +{ +#if IS_ENABLED(CONFIG_X86) + struct cpuinfo_x86 *c =3D &cpu_data(0); + + return !(c->x86 =3D=3D 6 && c->x86_model =3D=3D INTEL_FAM6_ALDERLAKE); +#else + return true; +#endif +} + static void vi_program_aspm(struct amdgpu_device *adev) { u32 data, data1, orig; bool bL1SS =3D false; bool bClkReqSupport =3D true; =20 - if (!amdgpu_device_should_use_aspm(adev)) + if (!amdgpu_device_should_use_aspm(adev) || !aspm_support_quirk_check()) return; =20 if (adev->flags & AMD_IS_APU || --=20 2.25.1