From patchwork Fri Nov 11 13:29:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Erling Ljunggren X-Patchwork-Id: 87316 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1otU6h-00676b-N5; Fri, 11 Nov 2022 13:30:08 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233918AbiKKNaF (ORCPT + 1 other); Fri, 11 Nov 2022 08:30:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230303AbiKKNaE (ORCPT ); Fri, 11 Nov 2022 08:30:04 -0500 Received: from aer-iport-1.cisco.com (aer-iport-1.cisco.com [173.38.203.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9AC935F852 for ; Fri, 11 Nov 2022 05:30:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2903; q=dns/txt; s=iport; t=1668173400; x=1669383000; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MwdriA2eFflz+M/lNcQIqz3LTfDAPdJWVcF8A9IG+FA=; b=ioiwLs79bqQM8dRY9rzmQmntbqykrIUzF2FDnAGn/AKNGMY8y52Wfp3c iGw4KGbr4R25qw4Xkt0Qd2nkh6htrmxJheQfhvQuLkUF2h8p189MmdFvN 2cgezAKnrAtUl0JMh045tQN5Jvrd6b6SqXqQ3HkLeUh66f3ErGwGldeDl M=; X-IronPort-AV: E=Sophos;i="5.96,156,1665446400"; d="scan'208";a="4891495" Received: from aer-iport-nat.cisco.com (HELO aer-core-1.cisco.com) ([173.38.203.22]) by aer-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 11 Nov 2022 13:28:55 +0000 Received: from office-260.rd.cisco.com ([10.47.79.110]) by aer-core-1.cisco.com (8.15.2/8.15.2) with ESMTP id 2ABDSsVP020236; Fri, 11 Nov 2022 13:28:54 GMT From: Erling Ljunggren To: linux-media@vger.kernel.org Cc: Erling Ljunggren Subject: [PATCH v4 2/5] media: docs: Add V4L2_CAP_EDID Date: Fri, 11 Nov 2022 14:29:03 +0100 Message-Id: <20221111132906.2212662-3-hljunggr@cisco.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221111132906.2212662-1-hljunggr@cisco.com> References: <20221111132906.2212662-1-hljunggr@cisco.com> MIME-Version: 1.0 X-Outbound-SMTP-Client: 10.47.79.110, [10.47.79.110] X-Outbound-Node: aer-core-1.cisco.com X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIMWL_WL_MED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, SPF_HELO_PASS,SPF_NONE,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -10.0 (----------) X-LSpam-Report: No, score=-10.0 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_MED=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,USER_IN_DEF_DKIM_WL=-7.5 autolearn=ham autolearn_force=no Add documentation for the new edid capability. Signed-off-by: Erling Ljunggren --- Documentation/userspace-api/media/v4l/biblio.rst | 11 +++++++++++ .../userspace-api/media/v4l/vidioc-querycap.rst | 11 +++++++++++ .../userspace-api/media/videodev2.h.rst.exceptions | 1 + 3 files changed, 23 insertions(+) diff --git a/Documentation/userspace-api/media/v4l/biblio.rst b/Documentation/userspace-api/media/v4l/biblio.rst index 9cd18c153d19..5cbe41877a63 100644 --- a/Documentation/userspace-api/media/v4l/biblio.rst +++ b/Documentation/userspace-api/media/v4l/biblio.rst @@ -334,6 +334,17 @@ VESA DMT :author: Video Electronics Standards Association (http://www.vesa.org) +.. _vesaeddc: + +E-DDC +==== + + +:title: VESA Enhanced Display Data Channel (E-DDC) Standard +:subtitle: Version 1.3 + +:author: Video Electronics Standards Association (http://www.vesa.org) + .. _vesaedid: EDID diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst index 6c57b8428356..3d11d86d9cbf 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst @@ -244,6 +244,17 @@ specification the ioctl returns an ``EINVAL`` error code. - 0x01000000 - The device supports the :c:func:`read()` and/or :c:func:`write()` I/O methods. + * - ``V4L2_CAP_EDID`` + - 0x02000000 + - The device stores the EDID for a video input, or retrieves the EDID for a video + output. It is a standalone EDID device, so no video streaming etc. will take place. + + For a video input this is typically an eeprom that supports the + :ref:`VESA Enhanced Display Data Channel Standard `. It can be something + else as well, for example a micro controller. + + For a video output this is typically read from an external device such as an + HDMI splitter accessed by a serial port. * - ``V4L2_CAP_STREAMING`` - 0x04000000 - The device supports the :ref:`streaming ` I/O method. diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions index 9cbb7a0c354a..b1b1127d278c 100644 --- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions +++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions @@ -185,6 +185,7 @@ replace define V4L2_CAP_META_OUTPUT device-capabilities replace define V4L2_CAP_DEVICE_CAPS device-capabilities replace define V4L2_CAP_TOUCH device-capabilities replace define V4L2_CAP_IO_MC device-capabilities +replace define V4L2_CAP_EDID device-capabilities # V4L2 pix flags replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format`