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Wysocki" , Alexander Deucher CC: , , "Mario Limonciello" Subject: [PATCH 1/2] ACPI: video: Allow GPU drivers to report no panels Date: Wed, 7 Dec 2022 13:31:33 -0600 Message-ID: <20221207193134.763-2-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221207193134.763-1-mario.limonciello@amd.com> References: <20221207193134.763-1-mario.limonciello@amd.com> MIME-Version: 1.0 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-TrafficTypeDiagnostic: CO1NAM11FT070:EE_|PH8PR12MB6674:EE_ X-MS-Office365-Filtering-Correlation-Id: 8bfd2028-7bec-4062-6361-08dad889b8b6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230022)(4636009)(396003)(39860400002)(346002)(376002)(136003)(451199015)(36840700001)(40470700004)(46966006)(86362001)(36756003)(40460700003)(81166007)(356005)(44832011)(4326008)(8936002)(36860700001)(2906002)(110136005)(83380400001)(82740400003)(2616005)(316002)(16526019)(70206006)(40480700001)(186003)(336012)(54906003)(426003)(6636002)(1076003)(70586007)(5660300002)(478600001)(82310400005)(7696005)(41300700001)(6666004)(8676002)(26005)(47076005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Dec 2022 19:32:04.5864 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8bfd2028-7bec-4062-6361-08dad889b8b6 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: CO1NAM11FT070.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6674 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org The current logic for the ACPI backlight detection will create a backlight device if no native or vendor drivers have created 8 seconds after the system has booted if the ACPI tables included backlight control methods. If the GPU drivers have loaded, they may be able to report whether any LCD panels were found. Allow using this information to factor in whether to make an acpi_video0 backlight device. To avoid risks for regressions on complicated configurations with muxes and multiple native drivers, only take into account drivers that have reported this when the system is a desktop. Suggested-by: Hans de Goede Signed-off-by: Mario Limonciello --- drivers/acpi/acpi_video.c | 12 ++++++++++++ include/acpi/video.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c index 32953646caeb..e297f8877797 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -82,6 +82,7 @@ MODULE_PARM_DESC(register_backlight_delay, static bool may_report_brightness_keys; static int register_count; +static bool native_reported_nolcd; static DEFINE_MUTEX(register_count_mutex); static DEFINE_MUTEX(video_list_lock); static LIST_HEAD(video_bus_head); @@ -1811,6 +1812,9 @@ static bool acpi_video_should_register_backlight(struct acpi_video_device *dev) return false; } + if (native_reported_nolcd) + return false; + if (only_lcd) return dev->flags.lcd; return true; @@ -2178,6 +2182,14 @@ static bool should_check_lcd_flag(void) return false; } +void acpi_video_report_nolcd(void) +{ + /* Only take into account native driver reporting on desktops */ + if (dmi_is_desktop()) + native_reported_nolcd = true; +} +EXPORT_SYMBOL(acpi_video_report_nolcd); + int acpi_video_register(void) { int ret = 0; diff --git a/include/acpi/video.h b/include/acpi/video.h index a275c35e5249..1fccb111c197 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -53,6 +53,7 @@ enum acpi_backlight_type { }; #if IS_ENABLED(CONFIG_ACPI_VIDEO) +extern void acpi_video_report_nolcd(void); extern int acpi_video_register(void); extern void acpi_video_unregister(void); extern void acpi_video_register_backlight(void); From patchwork Wed Dec 7 19:31:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 13067565 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FEE1C352A1 for ; Wed, 7 Dec 2022 19:32:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229580AbiLGTcT (ORCPT ); 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Wed, 7 Dec 2022 13:32:04 -0600 From: Mario Limonciello To: Hans de Goede , "Rafael J . Wysocki" , Alexander Deucher CC: , , "Mario Limonciello" Subject: [PATCH 2/2] drm/amd/display: Report to ACPI video if no panels were found Date: Wed, 7 Dec 2022 13:31:34 -0600 Message-ID: <20221207193134.763-3-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221207193134.763-1-mario.limonciello@amd.com> References: <20221207193134.763-1-mario.limonciello@amd.com> MIME-Version: 1.0 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-TrafficTypeDiagnostic: CO1NAM11FT070:EE_|MW4PR12MB6951:EE_ X-MS-Office365-Filtering-Correlation-Id: 82067bca-e163-465c-ed52-08dad889b9e9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230022)(4636009)(376002)(396003)(39860400002)(346002)(136003)(451199015)(36840700001)(46966006)(40470700004)(1076003)(2906002)(16526019)(110136005)(2616005)(81166007)(356005)(8676002)(41300700001)(40480700001)(4326008)(70206006)(186003)(70586007)(26005)(82740400003)(7696005)(82310400005)(36756003)(44832011)(36860700001)(54906003)(8936002)(40460700003)(316002)(5660300002)(6636002)(83380400001)(478600001)(966005)(47076005)(86362001)(336012)(426003)(6666004)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Dec 2022 19:32:06.6175 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 82067bca-e163-465c-ed52-08dad889b9e9 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: CO1NAM11FT070.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6951 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On desktop APUs amdgpu doesn't create a native backlight device as no eDP panels are found. However if the BIOS has reported backlight control methods in the ACPI tables then an acpi_video0 backlight device will be made 8 seconds after boot. This has manifested in a power slider on a number of desktop APUs ranging from Ryzen 5000 through Ryzen 7000 on various motherboard manufacturers. To avoid this, report to the acpi video detection that the system does not have any panel connected in the native driver. Link: https://bugzilla.redhat.com/show_bug.cgi?id=1783786 Reported-by: Hans de Goede Signed-off-by: Mario Limonciello --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 512c32327eb1..b73f61ac5dd5 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -4371,6 +4371,10 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev) amdgpu_set_panel_orientation(&aconnector->base); } + /* If we didn't find a panel, notify the acpi video detection */ + if (dm->adev->flags & AMD_IS_APU && dm->num_of_edps == 0) + acpi_video_report_nolcd(); + /* Software is initialized. Now we can register interrupt handlers. */ switch (adev->asic_type) { #if defined(CONFIG_DRM_AMD_DC_SI)