From patchwork Tue Oct 31 15:27:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 739909 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E58D4C4167B for ; Tue, 31 Oct 2023 15:27:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344814AbjJaP1f (ORCPT ); Tue, 31 Oct 2023 11:27:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344783AbjJaP1e (ORCPT ); Tue, 31 Oct 2023 11:27:34 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21DDFE4 for ; Tue, 31 Oct 2023 08:27:32 -0700 (PDT) Received: from benjamin-XPS-13-9310.. (unknown [IPv6:2a01:e0a:120:3210:c562:2ef4:80c0:92f]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: benjamin.gaignard) by madras.collabora.co.uk (Postfix) with ESMTPSA id 9C27E66073A3; Tue, 31 Oct 2023 15:27:30 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1698766050; bh=k4/zDXxdjixxu0KdG6/i32m6c9v6+ezV2jMmBXNxNTU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V0TIUat3eymdL2rFCTa8sqSmC8Z56W4S9QCsdUJ2Ixei7X09ouqoIJ3Aw3/5zho2S s0nPRoHugtbc37n3W2/Fa8hkrb693f8uNylMiRtWkURfwqfw7TOc9A7XRNgJhOWeM4 /k57klwglhKaj+4PL+gXHu2VdWjYcDXTkwzpsnqa82+t1SRNUOv3kcUeiSJi5fO9xY xJunakdgBKof8p5o7OuvNM0ItMWNCSEMDP7+i9g27pky0JB1sU24hAIDrn8gMws6Sm wbzzMPQ3cOkiJ8Sf6sMMmIU35iAbWXoBbsfotAsCm34ckKMdUPZ44q8mlXIi8IJ9p0 eVmMAiWjcNKIg== From: Benjamin Gaignard To: hverkuil-cisco@xs4all.nl, nicolas.dufresne@collabora.com, mchehab@kernel.org Cc: linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v5 1/4] v4l-utils: Add max_num_buffers field to v4l2_create_buffers struct Date: Tue, 31 Oct 2023 16:27:19 +0100 Message-Id: <20231031152722.84444-2-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231031152722.84444-1-benjamin.gaignard@collabora.com> References: <20231031152722.84444-1-benjamin.gaignard@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add 'max_num_buffers' field to 'struct v4l2_create_buffers' and define V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS. Signed-off-by: Benjamin Gaignard --- include/linux/videodev2.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h index 27680a39..e7312cfb 100644 --- a/include/linux/videodev2.h +++ b/include/linux/videodev2.h @@ -991,6 +991,7 @@ struct v4l2_requestbuffers { #define V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS (1 << 4) #define V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF (1 << 5) #define V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS (1 << 6) +#define V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS (1 << 7) /** * struct v4l2_plane - plane info for multi-planar buffers @@ -2545,6 +2546,9 @@ struct v4l2_dbg_chip_info { * @flags: additional buffer management attributes (ignored unless the * queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability * and configured for MMAP streaming I/O). + * @max_num_buffers: if V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS capability flag is set + * this field indicate the maximum possible number of buffers + * for this queue. * @reserved: future extensions */ struct v4l2_create_buffers { @@ -2554,7 +2558,8 @@ struct v4l2_create_buffers { struct v4l2_format format; __u32 capabilities; __u32 flags; - __u32 reserved[6]; + __u32 max_num_buffers; + __u32 reserved[5]; }; /*