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 8C66AC4167B for ; Mon, 4 Dec 2023 14:42:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345472AbjLDOm0 (ORCPT ); Mon, 4 Dec 2023 09:42:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233602AbjLDOmY (ORCPT ); Mon, 4 Dec 2023 09:42:24 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E50DA9 for ; Mon, 4 Dec 2023 06:42:30 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AB7D9C433C7; Mon, 4 Dec 2023 14:42:27 +0000 (UTC) Message-ID: <5bc3e0e7-36b4-4553-8a2a-353fe533fe78@xs4all.nl> Date: Mon, 4 Dec 2023 15:42:26 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 17/36] media: test-drivers: Fix misuse of min_buffers_needed field 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, Shuah Khan , Kieran Bingham References: <20231204132323.22811-1-benjamin.gaignard@collabora.com> <20231204132323.22811-18-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 14:23, Benjamin Gaignard wrote: > 'min_buffers_needed' is suppose to be used to indicate the number > of buffers needed by DMA engine to start streaming. > Obvious test-drivers don't use DMA engine and just want to specify > the minimum number of buffers to allocate when calling VIDIOC_REQBUFS. > That 'min_reqbufs_allocation' field purpose so use it. > While at it rename function parameter. > > Signed-off-by: Benjamin Gaignard > CC: Shuah Khan > CC: Kieran Bingham > --- > drivers/media/test-drivers/vimc/vimc-capture.c | 2 +- > drivers/media/test-drivers/vivid/vivid-core.c | 4 ++-- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c > index aa944270e716..97693561f1e4 100644 > --- a/drivers/media/test-drivers/vimc/vimc-capture.c > +++ b/drivers/media/test-drivers/vimc/vimc-capture.c > @@ -432,7 +432,7 @@ static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc, > q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG > ? &vb2_dma_contig_memops : &vb2_vmalloc_memops; > q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; > - q->min_buffers_needed = 2; > + q->min_reqbufs_allocation = 2; > q->lock = &vcapture->lock; > q->dev = v4l2_dev->dev; > That's OK. > diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c > index 353f035fcd19..b4e888ac6016 100644 > --- a/drivers/media/test-drivers/vivid/vivid-core.c > +++ b/drivers/media/test-drivers/vivid/vivid-core.c > @@ -861,7 +861,7 @@ static const struct media_device_ops vivid_media_ops = { > static int vivid_create_queue(struct vivid_dev *dev, > struct vb2_queue *q, > u32 buf_type, > - unsigned int min_buffers_needed, > + unsigned int min_reqbufs_allocation, > const struct vb2_ops *ops) > { > if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->multiplanar) > @@ -898,7 +898,7 @@ static int vivid_create_queue(struct vivid_dev *dev, > q->mem_ops = allocators[dev->inst] == 1 ? &vb2_dma_contig_memops : > &vb2_vmalloc_memops; > q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; > - q->min_buffers_needed = supports_requests[dev->inst] ? 0 : min_buffers_needed; > + q->min_reqbufs_allocation = supports_requests[dev->inst] ? 0 : min_reqbufs_allocation; But here you can simplify this to: q->min_reqbufs_allocation = min_reqbufs_allocation; The 'supports_requests' restriction is only relevant for q->min_buffers_needed. Regards, Hans > q->lock = &dev->mutex; > q->dev = dev->v4l2_dev.dev; > q->supports_requests = supports_requests[dev->inst];