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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 BN8NAM11FT062.mail.protection.outlook.com (10.13.177.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5144.20 via Frontend Transport; Fri, 8 Apr 2022 19:05:51 +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, 8 Apr 2022 14:05:50 -0500 From: Richard Gong To: , , , , CC: , , , , Subject: [PATCHv2] drm/amdgpu: disable ASPM on Intel AlderLake based systems Date: Fri, 8 Apr 2022 14:05:02 -0500 Message-ID: <20220408190502.4103670-1-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: 7ee0132f-f0f9-4b2e-57c0-08da1992cc8b X-MS-TrafficTypeDiagnostic: LV2PR12MB5798: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: 08 Apr 2022 19:05:51.3168 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7ee0132f-f0f9-4b2e-57c0-08da1992cc8b 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: BN8NAM11FT062.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5798 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 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 Reported-by: kernel test robot Reviewed-by: Alex Deucher Reviewed-by: Mario Limonciello --- 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..8b4eaf54b23e 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_64) +#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 intel_core_apsm_chk(void) +{ +#if IS_ENABLED(CONFIG_X86_64) + struct cpuinfo_x86 *c =3D &cpu_data(0); + + return (c->x86 =3D=3D 6 && c->x86_model =3D=3D INTEL_FAM6_ALDERLAKE); +#else + return false; +#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) || intel_core_apsm_chk()) return; =20 if (adev->flags & AMD_IS_APU || --=20 2.25.1