linux-kernel - Re: [PATCH v2] hantro: Fix JPEG encoder ENUM

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Message-ID: <8d13ffb9-74cb-00f9-072a-0614e341e1ef@collabora.com>
Date:   Sat, 24 Dec 2022 09:03:59 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>
Cc:     kernel@...labora.com, Robert Mader <robert.mader@...labora.com>,
        linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] hantro: Fix JPEG encoder ENUM_FRMSIZE on RK3399


Le 23/12/2022 à 19:16, Nicolas Dufresne a écrit :
> Since 79c987de8b354, enumerating framesize on format set with "MODE_NONE"
> (any raw formats) is reporting an invalid frmsize.
>
>    Size: Stepwise 0x0 - 0x0 with step 0/0
>
> Before this change, the driver would return EINVAL, which is also invalid but
> worked in GStreamer. The original intent was not to implement it, hence the
> -ENOTTY return in this change. While drivers should implement ENUM_FRMSIZE for
> all formats and queues, this change is limited in scope to fix the regression.
>
> This fixes taking picture in Gnome Cheese software, or any software using
> GSteamer to encode JPEG with hardware acceleration.
>
> Fixes: 79c987de8b354 ("media: hantro: Use post processor scaling capacities")
> Reported-by: Robert Mader <robert.mader@...labora.com>
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

Reviewed-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>

> ---
>   drivers/media/platform/verisilicon/hantro_v4l2.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
> index 2c7a805289e7b..30e650edaea8a 100644
> --- a/drivers/media/platform/verisilicon/hantro_v4l2.c
> +++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
> @@ -161,8 +161,11 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
>   	}
>   
>   	/* For non-coded formats check if postprocessing scaling is possible */
> -	if (fmt->codec_mode == HANTRO_MODE_NONE && hantro_needs_postproc(ctx, fmt)) {
> -		return hanto_postproc_enum_framesizes(ctx, fsize);
> +	if (fmt->codec_mode == HANTRO_MODE_NONE) {
> +		if (hantro_needs_postproc(ctx, fmt))
> +			return hanto_postproc_enum_framesizes(ctx, fsize);
> +		else
> +			return -ENOTTY;
>   	} else if (fsize->index != 0) {
>   		vpu_debug(0, "invalid frame size index (expected 0, got %d)\n",
>   			  fsize->index);