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Tue, 10 Nov 2026 19:45:04 -0600 From: Wayne Lin To: CC: Harry Wentland , Leo Li , Aurabindo Pillai , Roman Li , Wayne Lin , Tom Chung , "Fangzhi Zuo" , Dan Wheeler , Ray Wu , Ivan Lipski , Alex Hung , James Lin , Chenyu Chen Subject: [PATCH 66/74] drm/amd/display: Limit VRAM aperture retrieval to DCN6 Date: Wed, 11 Nov 2026 09:29:12 +0800 Message-ID: <20261111014100.3596072-67-Wayne.Lin@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261111014100.3596072-1-Wayne.Lin@amd.com> References: <20261111014100.3596072-1-Wayne.Lin@amd.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PEPF00000044:EE_|SJ0PR12MB7067:EE_ X-MS-Office365-Filtering-Correlation-Id: cce9019a-d711-4461-2f93-08df3f956f43 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|376014|82310400026|1800799024|23010399003|36860700016|6133799003|261009223027099003|10067099003|3023799007|261022105027099003|261026140227099003|261026121527099003|261022075727099003|261028144727099003|261021123027099003|261021121427099003|261102130727099003|261102123227099003|11063799006|56012099006|18002099003|22082099003; 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Return only dm_get_alt_channel_pstate_switch_aperture on other ASICs. Cc: Sun peng Li Signed-off-by: Ivan Lipski Signed-off-by: Wayne Lin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_dmub.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_dmub.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_dmub.c index d655ae8bbb52..ebd8130cb04d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_dmub.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_dmub.c @@ -168,7 +168,7 @@ EXPORT_IF_KUNIT(dm_register_dmub_notify_callback); * * Reads both apertures before populating the DMUB parameters and DML2 config. * Translates their base addresses into MC space for DML2. If either aperture - * is unavailable, the feature remains disabled. + * is unavailable, the feature remains disabled. Only DCN 6.0 supports the feature. */ static void dm_get_alt_channel_pstate_switch_aperture(struct amdgpu_device *adev, @@ -183,6 +183,13 @@ dm_get_alt_channel_pstate_switch_aperture(struct amdgpu_device *adev, u32 i; int r; + switch (amdgpu_ip_version(adev, DCE_HWIP, 0)) { + case IP_VERSION(6, 0, 0): + break; + default: + return; + } + /* Region IDs 5 and 6 identify the p-state switch apertures 1 and 2. * Do not publish partial aperture configuration if either lookup fails. */ -- 2.43.0