From patchwork Tue Apr 16 20:31:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Klymenko, Anatoliy" X-Patchwork-Id: 13632580 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (mail-mw2nam12on2042.outbound.protection.outlook.com [40.107.244.42]) (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 188AF84E01; Tue, 16 Apr 2024 20:32:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.244.42 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713299530; cv=fail; b=LDZ6rBauBxrH066RVSlVH7povEPzTGPg7QskyA6fpLbAT6Le5AX+L6/pHscBxsvOB4NMadpU/d7IVfPsvLkpiqU02v9IjHhQjOeqZFSOYYcgt9K3EwzH6FlRoTsZWBuGwiFL6m/zKTmtVs0UoLbSFCB8GVhJCQSGNSNTL9h/0mY= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713299530; c=relaxed/simple; bh=DQDuToZUbYaztNRGSCUeEGfmA4zMDWlB0+yD6Djukpk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=pcpM375G2C9OwBdTLDrYACmzc36dceLRidbs5NcZsZSLgwGjunAb5VtMZmCL8nBVKOJ46uIvRoroLU0W5dwWpPe1x2/2DdobQ36g/NRaT1XQW25VE1uKw09g4QrpA8g70kXpEEw40e/sgjhdNVZs1rQG0g9sE36ZxGxpkgN9QP0= 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=lWHkOTBu; arc=fail smtp.client-ip=40.107.244.42 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="lWHkOTBu" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=UfC3xT9LxMtEutS1qYJWlU8TIKh2a6e6bFCOV14bQ/6Rzn2uCVHYrggnucuokR+b1cNNxI6m0cOEWAUdY2hDjxhWR8aLNIMsrIe5QBuegfI+M8hiJ8UUG2m4mdV1Q5EAFQDAKcANsh3S0543gm+OlYKNJXVBOlMnf5zEJeVJ5PIhZYsf13O7RKLwc8S4aIxNboT+6mRoCymC8jBerKWX4EJR9FAMXRdT5pKidC/yU6MbRGo4ZDU3lAlBrXdFo5IWpnv+zabieJ23AGHumEch8PCRnAuwp4ZN4N8abQmmjCyvc9V2ge1ngkemNsluKAIXmZj7/yCSQGmz/33Q4Gb9lQ== 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=c0ImcF5+f8PxLy3F3qASiZOnUYitjVli58R3DNOhPXQ=; b=Xd9BM6zaygH4MV0QI4oLOnQ963ESAYkcDRvhf+XkNmJTkJO2y9Krn1SjCZIc/iC2zi88l67kRR5UECjJO1lKMdWrppLU/V+vIhCHjlNgdIjJVX3NK6iYD/+zYUT6RKEARFMem47ddbG2QF3+4/9boQ3n6k7dVCESTr2ADFoMlg2pXEgfjb30aT8TOuL7NX/igSyMUuCi4Z7aQfmexbQjRO+Z+Zh7Kjf0S9WQZlM6eG9ujqbxP13UjspuMhvZFsRzSyILKm5F6zpPYS1i8yYF+uOGiGiQdVmb/COvMftLBWgmvFcUMdT9gLW4ye36DG4he+xESjAGiUpxT0VZPqXnfw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=lists.infradead.org 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=c0ImcF5+f8PxLy3F3qASiZOnUYitjVli58R3DNOhPXQ=; b=lWHkOTBuuuzOE+b7TewSlcO0NZBpCKleDVLTG16uIByo+B6yDTZdsK+ElnpGuL5GwQU6F5LTCtcxOCCXCzbpxrBEvNzAxcbniD7lWbn3t10wnVR9wSTGfKw9IfKTFGiUq79Gvq4O+6ZNbEKhs/K8HNUkZGoit6Ur0m9wjxfMMEE= Received: from BL1PR13CA0239.namprd13.prod.outlook.com (2603:10b6:208:2bf::34) by IA1PR12MB7615.namprd12.prod.outlook.com (2603:10b6:208:428::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7452.50; Tue, 16 Apr 2024 20:32:05 +0000 Received: from BL6PEPF0001AB76.namprd02.prod.outlook.com (2603:10b6:208:2bf:cafe::f4) by BL1PR13CA0239.outlook.office365.com (2603:10b6:208:2bf::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7495.19 via Frontend Transport; Tue, 16 Apr 2024 20:32:05 +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=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by BL6PEPF0001AB76.mail.protection.outlook.com (10.167.242.169) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7452.22 via Frontend Transport; Tue, 16 Apr 2024 20:32:05 +0000 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Tue, 16 Apr 2024 15:32:02 -0500 Received: from xsjanatoliy50.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2507.35 via Frontend Transport; Tue, 16 Apr 2024 15:32:00 -0500 From: Anatoliy Klymenko Date: Tue, 16 Apr 2024 13:31:42 -0700 Subject: [PATCH v4 7/7] drm/atomic-helper: Add select_output_bus_format callback Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240416-dp-live-fmt-v4-7-c7f379b7168e@amd.com> References: <20240416-dp-live-fmt-v4-0-c7f379b7168e@amd.com> In-Reply-To: <20240416-dp-live-fmt-v4-0-c7f379b7168e@amd.com> To: Laurent Pinchart , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Michal Simek , "Andrzej Hajda" , Neil Armstrong , Robert Foss , Jonas Karlman , "Jernej Skrabec" , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mauro Carvalho Chehab CC: , , , Tomi Valkeinen , , , Anatoliy Klymenko X-Mailer: b4 0.13.0 Received-SPF: None (SATLEXMB03.amd.com: anatoliy.klymenko@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB76:EE_|IA1PR12MB7615:EE_ X-MS-Office365-Filtering-Correlation-Id: da737df2-7fd8-4601-d812-08dc5e5447d9 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:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(82310400014)(36860700004)(1800799015)(376005)(7416005)(921011);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Apr 2024 20:32:05.4396 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: da737df2-7fd8-4601-d812-08dc5e5447d9 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB76.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7615 Add optional drm_crtc_helper_funcs.select_output_bus_format callback. This callback allows to negotiate compatible media bus format on the link between CRTC and connected DRM encoder or DRM bridge chain. A good usage example is the CRTC implemented as FPGA soft IP. This kind of CRTC will most certainly support a single output media bus format, as supporting multiple runtime options consumes extra FPGA resources. A variety of options for the FPGA designs are usually achieved by synthesizing IP with different parameters. Add drm_helper_crtc_select_output_bus_format that wraps drm_crtc_helper_funcs.select_output_bus_format. Incorporate select_output_bus_format callback into the format negotiation stage to fix the input bus format of the first DRM bridge in the chain. Save negotiated output media bus format in drm_crtc_state. Signed-off-by: Anatoliy Klymenko --- drivers/gpu/drm/drm_bridge.c | 14 ++++++++++-- drivers/gpu/drm/drm_crtc_helper.c | 38 ++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 11 +++++++++ include/drm/drm_crtc_helper.h | 5 +++++ include/drm/drm_modeset_helper_vtables.h | 30 +++++++++++++++++++++++++ 5 files changed, 96 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 521a71c61b16..955ca108cd4b 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -28,6 +28,7 @@ #include #include +#include #include #include #include @@ -879,7 +880,8 @@ static int select_bus_fmt_recursive(struct drm_bridge *first_bridge, unsigned int i, num_in_bus_fmts = 0; struct drm_bridge_state *cur_state; struct drm_bridge *prev_bridge; - u32 *in_bus_fmts; + struct drm_crtc *crtc = crtc_state->crtc; + u32 *in_bus_fmts, in_fmt; int ret; prev_bridge = drm_bridge_get_prev_bridge(cur_bridge); @@ -933,7 +935,15 @@ static int select_bus_fmt_recursive(struct drm_bridge *first_bridge, return -ENOMEM; if (first_bridge == cur_bridge) { - cur_state->input_bus_cfg.format = in_bus_fmts[0]; + in_fmt = drm_helper_crtc_select_output_bus_format(crtc, + crtc_state, + in_bus_fmts, + num_in_bus_fmts); + if (!in_fmt) { + kfree(in_bus_fmts); + return -ENOTSUPP; + } + cur_state->input_bus_cfg.format = in_fmt; cur_state->output_bus_cfg.format = out_bus_fmt; kfree(in_bus_fmts); return 0; diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 2dafc39a27cb..4d3aa39c8a82 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -1055,3 +1055,41 @@ int drm_helper_force_disable_all(struct drm_device *dev) return ret; } EXPORT_SYMBOL(drm_helper_force_disable_all); + +/** + * drm_helper_crtc_select_output_bus_format - Select output media bus format + * @crtc: The CRTC to query + * @crtc_state: The new CRTC state + * @supported_fmts: List of media bus format options to pick from + * @num_supported_fmts: Number of media bus formats in @supported_fmts list + * + * Encoder drivers may call this helper to give the connected CRTC a chance to + * select compatible or preffered media bus format to use over the CRTC encoder + * link. Encoders should provide list of supported input MEDIA_BUS_FMT_* for + * CRTC to pick from. CRTC driver is expected to select preferred media bus + * format from the list and, once enabled, generate the signal accordingly. + * + * Returns: + * Selected preferred media bus format or 0 if CRTC does not support any from + * @supported_fmts list. + */ +u32 drm_helper_crtc_select_output_bus_format(struct drm_crtc *crtc, + struct drm_crtc_state *crtc_state, + const u32 *supported_fmts, + unsigned int num_supported_fmts) +{ + if (!crtc || !crtc_state || !supported_fmts || !num_supported_fmts) + return 0; + + if (!crtc->helper_private || + !crtc->helper_private->select_output_bus_format) + crtc_state->output_bus_format = supported_fmts[0]; + else + crtc_state->output_bus_format = + crtc->helper_private->select_output_bus_format(crtc, + crtc_state, + supported_fmts, + num_supported_fmts); + return crtc_state->output_bus_format; +} +EXPORT_SYMBOL(drm_helper_crtc_select_output_bus_format); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 8b48a1974da3..cdaa27f50af7 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -317,6 +317,17 @@ struct drm_crtc_state { */ enum drm_scaling_filter scaling_filter; + /** + * @output_bus_format: + * + * CRTC output media bus format of the video signal negotiated between + * CRTC and encoder. This value should be one of MEDIA_BUS_FMT* + * from uapi/linux/media-bus-format.h. It is safe to ignore + * @output_bus_format if CRTC doesn't support multiple output bus format + * options. + */ + u32 output_bus_format; + /** * @event: * diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h index 8c886fc46ef2..b7eb52f3ce41 100644 --- a/include/drm/drm_crtc_helper.h +++ b/include/drm/drm_crtc_helper.h @@ -38,6 +38,7 @@ struct drm_atomic_state; struct drm_connector; struct drm_crtc; +struct drm_crtc_state; struct drm_device; struct drm_display_mode; struct drm_encoder; @@ -61,5 +62,9 @@ int drm_helper_connector_dpms(struct drm_connector *connector, int mode); void drm_helper_resume_force_mode(struct drm_device *dev); int drm_helper_force_disable_all(struct drm_device *dev); +u32 drm_helper_crtc_select_output_bus_format(struct drm_crtc *crtc, + struct drm_crtc_state *crtc_state, + const u32 *supported_fmts, + unsigned int num_supported_fmts); #endif diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index 881b03e4dc28..6d5a081e21a4 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -489,6 +489,36 @@ struct drm_crtc_helper_funcs { bool in_vblank_irq, int *vpos, int *hpos, ktime_t *stime, ktime_t *etime, const struct drm_display_mode *mode); + + /** + * @select_output_bus_format + * + * Called by the connected DRM encoder to negotiate input media bus + * format. CRTC is expected to pick preferable media formats from the + * list provided by the DRM encoder. + * + * This callback is optional. + * + * Parameters: + * + * crtc: + * The CRTC. + * crcs_state: + * New CRTC state. + * supported_fmts: + * List of input bus formats supported by the encoder. + * num_supported_fmts: + * Number of formats in the list. + * + * Returns: + * + * Preferred bus format from the list or 0 if CRTC doesn't support any + * from the provided list. + */ + u32 (*select_output_bus_format)(struct drm_crtc *crtc, + struct drm_crtc_state *crtc_state, + const u32 *supported_fmts, + unsigned int num_supported_fmts); }; /**