From patchwork Fri Jun 18 09:11:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Werner Sembach X-Patchwork-Id: 12330653 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A78FBC49EB9 for ; Fri, 18 Jun 2021 09:12:12 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7B27C613E9 for ; Fri, 18 Jun 2021 09:12:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B27C613E9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=tuxedocomputers.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 841B76E9D7; Fri, 18 Jun 2021 09:11:43 +0000 (UTC) Received: from srv6.fidu.org (srv6.fidu.org [159.69.62.71]) by gabe.freedesktop.org (Postfix) with ESMTPS id 445B36E9C6; Fri, 18 Jun 2021 09:11:38 +0000 (UTC) Received: from localhost (localhost.localdomain [127.0.0.1]) by srv6.fidu.org (Postfix) with ESMTP id D2E39C800BF; Fri, 18 Jun 2021 11:11:36 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at srv6.fidu.org Received: from srv6.fidu.org ([127.0.0.1]) by localhost (srv6.fidu.org [127.0.0.1]) (amavisd-new, port 10026) with LMTP id XTnvvaomQ0rZ; Fri, 18 Jun 2021 11:11:36 +0200 (CEST) Received: from wsembach-tuxedo.fritz.box (p200300e37f3949001760E5710682cA7E.dip0.t-ipconnect.de [IPv6:2003:e3:7f39:4900:1760:e571:682:ca7e]) (Authenticated sender: wse@tuxedocomputers.com) by srv6.fidu.org (Postfix) with ESMTPA id 6A23DC800B3; Fri, 18 Jun 2021 11:11:36 +0200 (CEST) From: Werner Sembach To: harry.wentland@amd.com, sunpeng.li@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, airlied@linux.ie, daniel@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v4 06/17] drm/uAPI: Add "active color format" drm property as feedback for userspace Date: Fri, 18 Jun 2021 11:11:05 +0200 Message-Id: <20210618091116.14428-7-wse@tuxedocomputers.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210618091116.14428-1-wse@tuxedocomputers.com> References: <20210618091116.14428-1-wse@tuxedocomputers.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Werner Sembach Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a new general drm property "active color format" which can be used by graphic drivers to report the used color format back to userspace. There was no way to check which color format got actually used on a given monitor. To surely predict this, one must know the exact capabilities of the monitor, the GPU, and the connection used and what the default behaviour of the used driver is (e.g. amdgpu prefers YCbCr 4:4:4 while i915 prefers RGB). This property helps eliminating the guessing on this point. In the future, automatic color calibration for screens might also depend on this information being available. Signed-off-by: Werner Sembach Acked-by: Pekka Paalanen --- drivers/gpu/drm/drm_connector.c | 61 +++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 9 +++++ 2 files changed, 70 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 943f6b61053b..684d7abdf0eb 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -889,6 +889,14 @@ static const struct drm_prop_enum_list drm_dp_subconnector_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Native, "Native" }, /* DP */ }; +static const struct drm_prop_enum_list drm_active_color_format_enum_list[] = { + { 0, "unknown" }, + { DRM_COLOR_FORMAT_RGB444, "rgb" }, + { DRM_COLOR_FORMAT_YCRCB444, "ycbcr444" }, + { DRM_COLOR_FORMAT_YCRCB422, "ycbcr422" }, + { DRM_COLOR_FORMAT_YCRCB420, "ycbcr420" }, +}; + DRM_ENUM_NAME_FN(drm_get_dp_subconnector_name, drm_dp_subconnector_enum_list) @@ -1205,6 +1213,14 @@ static const struct drm_prop_enum_list dp_colorspaces[] = { * Drivers shall use drm_connector_attach_active_bpc_property() to install * this property. * + * active color format: + * This read-only property tells userspace the color format actually used + * by the hardware display engine on "the cable" on a connector. The chosen + * value depends on hardware capabilities, both display engine and + * connected monitor. Drivers shall use + * drm_connector_attach_active_color_format_property() to install this + * property. + * * Connectors also have one standardized atomic property: * * CRTC_ID: @@ -2203,6 +2219,51 @@ void drm_connector_set_active_bpc_property(struct drm_connector *connector, int } EXPORT_SYMBOL(drm_connector_set_active_bpc_property); +/** + * drm_connector_attach_active_color_format_property - attach "active color format" property + * @connector: connector to attach active color format property on. + * + * This is used to check the applied color format on a connector. + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_connector_attach_active_color_format_property(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_property *prop; + + if (!connector->active_color_format_property) { + prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "active color format", + drm_active_color_format_enum_list, + ARRAY_SIZE(drm_active_color_format_enum_list)); + if (!prop) + return -ENOMEM; + + connector->active_color_format_property = prop; + drm_object_attach_property(&connector->base, prop, 0); + } + + return 0; +} +EXPORT_SYMBOL(drm_connector_attach_active_color_format_property); + +/** + * drm_connector_set_active_color_format_property - sets the active color format property for a + * connector + * @connector: drm connector + * @active_color_format: color format for the connector currently active on "the cable" + * + * Should be used by atomic drivers to update the active color format over a connector. + */ +void drm_connector_set_active_color_format_property(struct drm_connector *connector, + u32 active_color_format) +{ + drm_object_property_set_value(&connector->base, connector->active_color_format_property, + active_color_format); +} +EXPORT_SYMBOL(drm_connector_set_active_color_format_property); + /** * drm_connector_attach_hdr_output_metadata_property - attach "HDR_OUTPUT_METADA" property * @connector: connector to attach the property on. diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index eee86de62a5f..8a5197f14e87 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1386,6 +1386,12 @@ struct drm_connector { */ struct drm_property *active_bpc_property; + /** + * @active_color_format_property: Default connector property for the + * active color format to be driven out of the connector. + */ + struct drm_property *active_color_format_property; + #define DRM_CONNECTOR_POLL_HPD (1 << 0) #define DRM_CONNECTOR_POLL_CONNECT (1 << 1) #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2) @@ -1710,6 +1716,9 @@ int drm_connector_attach_max_bpc_property(struct drm_connector *connector, int min, int max); int drm_connector_attach_active_bpc_property(struct drm_connector *connector, int min, int max); void drm_connector_set_active_bpc_property(struct drm_connector *connector, int active_bpc); +int drm_connector_attach_active_color_format_property(struct drm_connector *connector); +void drm_connector_set_active_color_format_property(struct drm_connector *connector, + u32 active_color_format); /** * struct drm_tile_group - Tile group metadata