From mboxrd@z Thu Jan 1 00:00:00 1970 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 2AA03C4167B for ; Mon, 4 Dec 2023 14:31:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345831AbjLDObf (ORCPT ); Mon, 4 Dec 2023 09:31:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236059AbjLDObI (ORCPT ); Mon, 4 Dec 2023 09:31:08 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5AC91BDD for ; Mon, 4 Dec 2023 06:30:11 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39F85C433C7; Mon, 4 Dec 2023 14:30:09 +0000 (UTC) Message-ID: Date: Mon, 4 Dec 2023 15:30:08 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 11/36] media: ti: davinci: Remove useless setting of min_buffers_needed Content-Language: en-US, nl To: Benjamin Gaignard , mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com, matt.ranostay@konsulko.com Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-staging@lists.linux.dev, kernel@collabora.com, "Lad, Prabhakar" References: <20231204132323.22811-1-benjamin.gaignard@collabora.com> <20231204132323.22811-12-benjamin.gaignard@collabora.com> From: Hans Verkuil Autocrypt: addr=hverkuil@xs4all.nl; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/12/2023 14:22, Benjamin Gaignard wrote: > This driver uses min_buffers_needed which vb2 uses to ensure > start_streaming is called when at least 'min_buffers_needed' > buffers are queued. However, this driver doesn't need this, > it can stream fine without any buffers queued. > Just drop this unnecessary restriction. > > Signed-off-by: Benjamin Gaignard > CC: "Lad, Prabhakar" > --- > drivers/media/platform/ti/davinci/vpif_capture.c | 1 - > drivers/media/platform/ti/davinci/vpif_display.c | 1 - > 2 files changed, 2 deletions(-) > > diff --git a/drivers/media/platform/ti/davinci/vpif_capture.c b/drivers/media/platform/ti/davinci/vpif_capture.c > index fc42b4bc37e6..300c3cb5cbed 100644 > --- a/drivers/media/platform/ti/davinci/vpif_capture.c > +++ b/drivers/media/platform/ti/davinci/vpif_capture.c > @@ -1429,7 +1429,6 @@ static int vpif_probe_complete(void) > q->mem_ops = &vb2_dma_contig_memops; > q->buf_struct_size = sizeof(struct vpif_cap_buffer); > q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; > - q->min_buffers_needed = 1; > q->lock = &common->lock; > q->dev = vpif_dev; > > diff --git a/drivers/media/platform/ti/davinci/vpif_display.c b/drivers/media/platform/ti/davinci/vpif_display.c > index 9dbab1003c1d..d45391a4d8f2 100644 > --- a/drivers/media/platform/ti/davinci/vpif_display.c > +++ b/drivers/media/platform/ti/davinci/vpif_display.c > @@ -1169,7 +1169,6 @@ static int vpif_probe_complete(void) > q->mem_ops = &vb2_dma_contig_memops; > q->buf_struct_size = sizeof(struct vpif_disp_buffer); > q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; > - q->min_buffers_needed = 1; > q->lock = &common->lock; > q->dev = vpif_dev; > err = vb2_queue_init(q); Drop this patch, this is really needed. Regards, Hans