linux-kernel - Re: [PATCH 13/55] media: aspeed: Stop abusing of min_buffers

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Message-ID: <986edf2e-10ac-211b-417c-cb2818a7fbe0@linux.ibm.com>
Date:   Mon, 27 Nov 2023 13:26:33 -0600
From:   Eddie James <eajames@...ux.ibm.com>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        hverkuil@...all.nl, mchehab@...nel.org, tfiga@...omium.org,
        m.szyprowski@...sung.com, matt.ranostay@...sulko.com
Cc:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, kernel@...labora.com,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...econstruct.com.au>,
        openbmc@...ts.ozlabs.org, linux-aspeed@...ts.ozlabs.org
Subject: Re: [PATCH 13/55] media: aspeed: Stop abusing of min_buffers_needed
 field


On 11/27/23 10:54, Benjamin Gaignard wrote:
> 'min_buffers_needed' is suppose to be used to indicate the number
> of buffers needed by DMA engine to start streaming.
> aspeed doesn'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.


Reviewed-by: Eddie James <eajames@...ux.ibm.com>


>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> CC: Eddie James <eajames@...ux.ibm.com> (maintainer:ASPEED VIDEO ENGINE DRIVER)
> CC: Joel Stanley <joel@....id.au> (supporter:ARM/ASPEED MACHINE SUPPORT)
> CC: Andrew Jeffery <andrew@...econstruct.com.au> (reviewer:ARM/ASPEED MACHINE SUPPORT)
> CC: openbmc@...ts.ozlabs.org (moderated list:ASPEED VIDEO ENGINE DRIVER)
> CC: linux-aspeed@...ts.ozlabs.org (moderated list:ARM/ASPEED MACHINE SUPPORT)
> ---
>   drivers/media/platform/aspeed/aspeed-video.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/aspeed/aspeed-video.c b/drivers/media/platform/aspeed/aspeed-video.c
> index d08aa7f73d4f..c28b10808cda 100644
> --- a/drivers/media/platform/aspeed/aspeed-video.c
> +++ b/drivers/media/platform/aspeed/aspeed-video.c
> @@ -2034,7 +2034,7 @@ static int aspeed_video_setup_video(struct aspeed_video *video)
>   	vbq->drv_priv = video;
>   	vbq->buf_struct_size = sizeof(struct aspeed_video_buffer);
>   	vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> -	vbq->min_buffers_needed = ASPEED_VIDEO_V4L2_MIN_BUF_REQ;
> +	vbq->min_reqbufs_allocation = ASPEED_VIDEO_V4L2_MIN_BUF_REQ;
>   
>   	rc = vb2_queue_init(vbq);
>   	if (rc) {