From patchwork Fri Aug 9 07:57:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 818350 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 876E7C8D1; Fri, 9 Aug 2024 08:13:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723191196; cv=none; b=guZGfXeOk0RqYqJLJkwFncBEqolbxajk4f4qLv5IDoywfJs+Wl6r2e0sIxlZc0FTUBnwzoJy9TgKfXVJ5uS0gUUuCrnOGiZDK1bQuTg+gh4LfqkbGZdv/orT3Be+gdukdbJMtPSuVMpi9ncs8XlDBsCLOKd7Bf/11nIEsiegZwM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723191196; c=relaxed/simple; bh=RpUyfg+35lwNalGpQyOQYvnqsQ4KBrwOxcAMUgE1BOs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ID+G3oOkYhoLv1w6HgK5BAzdg0QeNDXVToTF6CIz5Oir1tKnmO4fGIVsBFPj+b2czIaSleKpFsegAkR1NTiHBWNiP4YFLoGLBtzU/j6OvIjFqkH686eOLVfx33hJJXzO77vaLuTJKS3XITjbJjC99vYkeMPJO2pvS7pNKfWiF3k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3C695C4AF0D; Fri, 9 Aug 2024 08:13:15 +0000 (UTC) From: Hans Verkuil To: linux-media@vger.kernel.org Cc: linux-input@vger.kernel.org, Erling Ljunggren , Hans Verkuil Subject: [PATCH 3/6] media: docs: Add V4L2_CAP_EDID Date: Fri, 9 Aug 2024 09:57:35 +0200 Message-ID: <5b880a060574363d5ea351e20e0766abb476f6db.1723190258.git.hverkuil-cisco@xs4all.nl> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Erling Ljunggren Add documentation for the new edid capability. Signed-off-by: Erling Ljunggren Signed-off-by: Hans Verkuil --- 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 72aef1759b60..35674eeae20d 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 bdc628e8c1d6..d67fd4038d22 100644 --- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions +++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions @@ -197,6 +197,7 @@ 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`