From patchwork Wed Feb 14 21:57:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 13557063 X-Patchwork-Delegate: kieran@bingham.xyz Received: from NAM11-BN8-obe.outbound.protection.outlook.com (mail-bn8nam11on2041.outbound.protection.outlook.com [40.107.236.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E3C314199C; Wed, 14 Feb 2024 21:58:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.236.41 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707947915; cv=fail; b=CfAlvqx49ECZvp0eT7dBN3L8nL0ZroL1UTtHB0wpcIKZL76uAMfodpKEp72ZXfnIbcPgkHGcDZv9bdytocNDGZ9YtWJCHfbM096EENUDKp3t5gjo3ULlG0sM3EFv9Ld0MXek29TpiaooQXnwsNvz9BWM2nbf3eGJ7fbXramjans= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707947915; c=relaxed/simple; bh=2i2tAczuHFmpXHQWABxZYvFWWSYe/Q1OpOgTAeGAwAg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nLgXXtCrQ/QsfOIMc+XSSuM1K4Pw/XAtBB9M53H+N73nwxnsvlXzrvR11mRIcq1Xc5iQJgfBQhUwauSLbI6Lx8qRzNsPYaTNW6qgB5r3JjirecJRKF9OZRV3PSU/nFUPsGfXP/dZek+TX6J8eDdnAUxv1X/u9lcdtD6pJzIZXSQ= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=OHVOleSi; arc=fail smtp.client-ip=40.107.236.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="OHVOleSi" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=GRJ6olEaGFCdO0uYsIUYki5QFE6Go32nBiGTFEaQfgb6cXAy24wj9vUOBktcghqL7+JElNfg4nacXMLnrhvnxMxDtMxIy75KrlUoDI17qcatGHX07LuvvRlyjop57DSWGXrmh+4w3dZHFzGx4RpO76sgNFjk4GF2Bq3oLafJTyFTMXK80wc1ZXK/dW8F+L641syWZK4Yif8UDGYpRnCp4YIwF8NM2nl7ebg/rCp+eEA/ZlvcoVmcRw/uvM6tZQDpXQPCfe48qoVp/aMuGaSczaNpI/5/TjSLKtJNUa8J1mtDSRRp/weUJ7GdpQfeHLoLQJiAEStFj6PxwvG5BT4t0g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=ijTBQLavwGwoqcodRrW9x+ZVRUoNo9dDweW735Q8j+I=; b=Mn8DbT/2TontnMRCNtnMEZeZaivRQriM3V6mPAo+TgLfPgFf/35nGfSBAbmrZI0Cchg3nTNjsBj7P5k5RwH6tC5RhXuYqvmFM0tP3FvhDcBkwcU6mN0j8eXapr3ZMM/7eI5DcTVhY+9PKNydr2fKL+WVajfJ+0UxC0n3ihIsSbNj8tl2cOLFYuI26ikmj2Oho+RSJ0uXQABtYnq9GjwHd/ACR4wwi3CXkqpVjqHHljoT0TRBfhJJz2FTAlFp2JMZOBeJUIzMbW3soWp8n8uPmh4B0GEg8vnJkKHt/J/a8JoJjGNBBYnsrxZU/ZDwtUGN4KcWhKUo1eSx/Nq+hXMZUw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=ffwll.ch smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ijTBQLavwGwoqcodRrW9x+ZVRUoNo9dDweW735Q8j+I=; b=OHVOleSiSc9B3eB7cJXimILFNUg0+psPv7snMSODD7Qy4iLopUEmIIdv49l+YMHFhh7GyWPzXkmDgYdO0KGyCPdJADYVuzqytIDqQ8ysno2mm3LlPzudoGXqkZAp2HcZCV/v8mKKLPhh7fiV8iaaKeP/vlvy9mZf0xlNlHagW4M= Received: from BL1PR13CA0020.namprd13.prod.outlook.com (2603:10b6:208:256::25) by IA0PR12MB7506.namprd12.prod.outlook.com (2603:10b6:208:442::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7292.29; Wed, 14 Feb 2024 21:58:29 +0000 Received: from MN1PEPF0000ECD6.namprd02.prod.outlook.com (2603:10b6:208:256:cafe::d0) by BL1PR13CA0020.outlook.office365.com (2603:10b6:208:256::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7292.26 via Frontend Transport; Wed, 14 Feb 2024 21:58:29 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; 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; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by MN1PEPF0000ECD6.mail.protection.outlook.com (10.167.242.135) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7292.25 via Frontend Transport; Wed, 14 Feb 2024 21:58:29 +0000 Received: from AUS-P9-MLIMONCI.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 15.1.2507.35; Wed, 14 Feb 2024 15:58:28 -0600 From: Mario Limonciello To: Daniel Vetter , Jani Nikula , Alex Deucher , "Hans de Goede" , "open list:DRM DRIVERS" CC: , "open list:USB SUBSYSTEM" , , , , , , , "open list:ACPI" , open list , Melissa Wen , Mark Pearson , Mario Limonciello Subject: [PATCH v6 3/5] drm: Add support to get EDID from ACPI Date: Wed, 14 Feb 2024 15:57:54 -0600 Message-ID: <20240214215756.6530-4-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240214215756.6530-1-mario.limonciello@amd.com> References: <20240214215756.6530-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN1PEPF0000ECD6:EE_|IA0PR12MB7506:EE_ X-MS-Office365-Filtering-Correlation-Id: 66d143d8-d99f-4b44-3862-08dc2da81406 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:(13230031)(4636009)(39860400002)(396003)(376002)(346002)(136003)(230922051799003)(36860700004)(64100799003)(82310400011)(186009)(1800799012)(451199024)(46966006)(40470700004)(2616005)(41300700001)(7696005)(478600001)(66899024)(7416002)(44832011)(5660300002)(8936002)(8676002)(4326008)(2906002)(70586007)(70206006)(6666004)(54906003)(316002)(16526019)(1076003)(26005)(83380400001)(86362001)(36756003)(110136005)(426003)(82740400003)(81166007)(356005)(336012);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Feb 2024 21:58:29.3006 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 66d143d8-d99f-4b44-3862-08dc2da81406 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: MN1PEPF0000ECD6.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7506 Some manufacturers have intentionally put an EDID that differs from the EDID on the internal panel on laptops. Drivers that prefer to fetch this EDID can set a bit on the drm_connector to indicate that the DRM EDID helpers should try to fetch it and it is preferred if it's present. Signed-off-by: Mario Limonciello --- drivers/gpu/drm/Kconfig | 1 + drivers/gpu/drm/drm_edid.c | 109 +++++++++++++++++++++++++++++++++--- include/drm/drm_connector.h | 6 ++ include/drm/drm_edid.h | 1 + 4 files changed, 109 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 872edb47bb53..3db89e6af01d 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -8,6 +8,7 @@ menuconfig DRM tristate "Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)" depends on (AGP || AGP=n) && !EMULATED_CMPXCHG && HAS_DMA + depends on (ACPI_VIDEO || ACPI_VIDEO=n) select DRM_PANEL_ORIENTATION_QUIRKS select DRM_KMS_HELPER if DRM_FBDEV_EMULATION select FB_CORE if DRM_FBDEV_EMULATION diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 923c4423151c..cdc30c6d05d5 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -28,6 +28,7 @@ * DEALINGS IN THE SOFTWARE. */ +#include #include #include #include @@ -2188,6 +2189,58 @@ drm_do_probe_ddc_edid(void *data, u8 *buf, unsigned int block, size_t len) return ret == xfers ? 0 : -1; } +/** + * drm_do_probe_acpi_edid() - get EDID information via ACPI _DDC + * @data: struct drm_connector + * @buf: EDID data buffer to be filled + * @block: 128 byte EDID block to start fetching from + * @len: EDID data buffer length to fetch + * + * Try to fetch EDID information by calling acpi_video_get_edid() function. + * + * Return: 0 on success or error code on failure. + */ +static int +drm_do_probe_acpi_edid(void *data, u8 *buf, unsigned int block, size_t len) +{ + struct drm_connector *connector = data; + struct drm_device *ddev = connector->dev; + struct acpi_device *acpidev = ACPI_COMPANION(ddev->dev); + unsigned char start = block * EDID_LENGTH; + void *edid; + int r; + + if (!acpidev) + return -ENODEV; + + switch (connector->connector_type) { + case DRM_MODE_CONNECTOR_LVDS: + case DRM_MODE_CONNECTOR_eDP: + break; + default: + return -EINVAL; + } + + /* fetch the entire edid from BIOS */ + r = acpi_video_get_edid(acpidev, ACPI_VIDEO_DISPLAY_LCD, -1, &edid); + if (r < 0) { + DRM_DEBUG_KMS("Failed to get EDID from ACPI: %d\n", r); + return r; + } + if (len > r || start > r || start + len > r) { + r = -EINVAL; + goto cleanup; + } + + memcpy(buf, edid + start, len); + r = 0; + +cleanup: + kfree(edid); + + return r; +} + static void connector_bad_edid(struct drm_connector *connector, const struct edid *edid, int num_blocks) { @@ -2621,7 +2674,8 @@ EXPORT_SYMBOL(drm_probe_ddc); * @connector: connector we're probing * @adapter: I2C adapter to use for DDC * - * Poke the given I2C channel to grab EDID data if possible. If found, + * If the connector allows it, try to fetch EDID data using ACPI. If not found + * poke the given I2C channel to grab EDID data if possible. If found, * attach it to the connector. * * Return: Pointer to valid EDID or NULL if we couldn't find any. @@ -2629,20 +2683,50 @@ EXPORT_SYMBOL(drm_probe_ddc); struct edid *drm_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) { - struct edid *edid; + struct edid *edid = NULL; if (connector->force == DRM_FORCE_OFF) return NULL; - if (connector->force == DRM_FORCE_UNSPECIFIED && !drm_probe_ddc(adapter)) - return NULL; + if (connector->acpi_edid_allowed) + edid = _drm_do_get_edid(connector, drm_do_probe_acpi_edid, connector, NULL); + + if (!edid) { + if (connector->force == DRM_FORCE_UNSPECIFIED && !drm_probe_ddc(adapter)) + return NULL; + edid = _drm_do_get_edid(connector, drm_do_probe_ddc_edid, adapter, NULL); + } - edid = _drm_do_get_edid(connector, drm_do_probe_ddc_edid, adapter, NULL); drm_connector_update_edid_property(connector, edid); return edid; } EXPORT_SYMBOL(drm_get_edid); +/** + * drm_edid_read_acpi - get EDID data, if available + * @connector: connector we're probing + * + * Use the BIOS to attempt to grab EDID data if possible. + * + * The returned pointer must be freed using drm_edid_free(). + * + * Return: Pointer to valid EDID or NULL if we couldn't find any. + */ +const struct drm_edid *drm_edid_read_acpi(struct drm_connector *connector) +{ + const struct drm_edid *drm_edid; + + if (connector->force == DRM_FORCE_OFF) + return NULL; + + drm_edid = drm_edid_read_custom(connector, drm_do_probe_acpi_edid, connector); + + /* Note: Do *not* call connector updates here. */ + + return drm_edid; +} +EXPORT_SYMBOL(drm_edid_read_acpi); + /** * drm_edid_read_custom - Read EDID data using given EDID block read function * @connector: Connector to use @@ -2727,10 +2811,11 @@ const struct drm_edid *drm_edid_read_ddc(struct drm_connector *connector, EXPORT_SYMBOL(drm_edid_read_ddc); /** - * drm_edid_read - Read EDID data using connector's I2C adapter + * drm_edid_read - Read EDID data using BIOS or connector's I2C adapter * @connector: Connector to use * - * Read EDID using the connector's I2C adapter. + * Read EDID from BIOS if allowed by connector or by using the connector's + * I2C adapter. * * The EDID may be overridden using debugfs override_edid or firmware EDID * (drm_edid_load_firmware() and drm.edid_firmware parameter), in this priority @@ -2742,10 +2827,18 @@ EXPORT_SYMBOL(drm_edid_read_ddc); */ const struct drm_edid *drm_edid_read(struct drm_connector *connector) { + const struct drm_edid *drm_edid = NULL; + if (drm_WARN_ON(connector->dev, !connector->ddc)) return NULL; - return drm_edid_read_ddc(connector, connector->ddc); + if (connector->acpi_edid_allowed) + drm_edid = drm_edid_read_acpi(connector); + + if (!drm_edid) + drm_edid = drm_edid_read_ddc(connector, connector->ddc); + + return drm_edid; } EXPORT_SYMBOL(drm_edid_read); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index fe88d7fc6b8f..74ed47f37a69 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1886,6 +1886,12 @@ struct drm_connector { /** @hdr_sink_metadata: HDR Metadata Information read from sink */ struct hdr_sink_metadata hdr_sink_metadata; + + /** + * @acpi_edid_allowed: Get the EDID from the BIOS, if available. + * This is only applicable to eDP and LVDS displays. + */ + bool acpi_edid_allowed; }; #define obj_to_connector(x) container_of(x, struct drm_connector, base) diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 7923bc00dc7a..1c1ee927de9c 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -459,5 +459,6 @@ bool drm_edid_is_digital(const struct drm_edid *drm_edid); const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid, int ext_id, int *ext_index); +const struct drm_edid *drm_edid_read_acpi(struct drm_connector *connector); #endif /* __DRM_EDID_H__ */