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

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Date:   Sat, 24 Dec 2022 14:03:25 -0300
From:   Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>
Cc:     Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>, 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

On Sat, Dec 24, 2022 at 09:03:59AM +0100, Benjamin Gaignard wrote:
> 
> 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>
> 

Reviewed-by: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>

Thanks,
Ezequiel

> > ---
> >   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);