linux-kernel - Re: [PATCH v2] media: aspeed: fix mode-detect always time out at 2nd run

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Message-ID: <CACPK8XezrCtCbKVgNOPNt+N_7ki6Rctf9M8oLBHyixa+Wph2Sw@mail.gmail.com>
Date:   Wed, 3 Nov 2021 01:53:30 +0000
From:   Joel Stanley <joel@....id.au>
To:     Jammy Huang <jammy_huang@...eedtech.com>
Cc:     Eddie James <eajames@...ux.ibm.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Andrew Jeffery <andrew@...id.au>, linux-media@...r.kernel.org,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed <linux-aspeed@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Paul Menzel <pmenzel@...gen.mpg.de>
Subject: Re: [PATCH v2] media: aspeed: fix mode-detect always time out at 2nd run

On Wed, 3 Nov 2021 at 01:47, Joel Stanley <joel@....id.au> wrote:
>
> On Wed, 3 Nov 2021 at 01:13, Jammy Huang <jammy_huang@...eedtech.com> wrote:
> >
> > aspeed_video_get_resolution() will try to do res-detect again if the
> > timing got in last try is invalid. But it will always time out because
> > VE_SEQ_CTRL_TRIG_MODE_DET is only cleared after 1st mode-detect.
> >
> > To fix the problem, just clear VE_SEQ_CTRL_TRIG_MODE_DET before setting
> > it in aspeed_video_enable_mode_detect().
> >
> > Signed-off-by: Jammy Huang <jammy_huang@...eedtech.com>
> > Acked-by: Paul Menzel <pmenzel@...gen.mpg.de>
>
> Reviewed-by: Joel Stanley <joel@....id.au>

When applying, can we please have this tag added:

Fixes: d2b4387f3bdf ("media: platform: Add Aspeed Video Engine driver")

Cheers,

Joel


>
> > ---
> > v2:
> >   - update commit message
> > ---
> >  drivers/media/platform/aspeed-video.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
> > index 5ffbabf884eb..fea5e4d0927e 100644
> > --- a/drivers/media/platform/aspeed-video.c
> > +++ b/drivers/media/platform/aspeed-video.c
> > @@ -518,6 +518,10 @@ static void aspeed_video_enable_mode_detect(struct aspeed_video *video)
> >         aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
> >                             VE_INTERRUPT_MODE_DETECT);
> >
> > +       /* Disable mode detect in order to re-trigger */
> > +       aspeed_video_update(video, VE_SEQ_CTRL,
> > +                           VE_SEQ_CTRL_TRIG_MODE_DET, 0);
> > +
> >         /* Trigger mode detect */
> >         aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_TRIG_MODE_DET);
> >  }
> > @@ -809,10 +813,6 @@ static void aspeed_video_get_resolution(struct aspeed_video *video)
> >                         return;
> >                 }
> >
> > -               /* Disable mode detect in order to re-trigger */
> > -               aspeed_video_update(video, VE_SEQ_CTRL,
> > -                                   VE_SEQ_CTRL_TRIG_MODE_DET, 0);
> > -
> >                 aspeed_video_check_and_set_polarity(video);
> >
> >                 aspeed_video_enable_mode_detect(video);
> > --
> > 2.25.1
> >