Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20211103011357.22067-1-jammy_huang@aspeedtech.com>
In-Reply-To: <20211103011357.22067-1-jammy_huang@aspeedtech.com>
From:   Joel Stanley <joel@jms.id.au>
Date:   Wed, 3 Nov 2021 01:47:01 +0000
Message-ID: <CACPK8XcuhVVvbs4m5k=1d6oFiewEo2RqqOqf5R72KJ4yjiEiUw@mail.gmail.com>
Subject: Re: [PATCH v2] media: aspeed: fix mode-detect always time out at 2nd run
To:     Jammy Huang <jammy_huang@aspeedtech.com>
Cc:     Eddie James <eajames@linux.ibm.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Andrew Jeffery <andrew@aj.id.au>, linux-media@vger.kernel.org,
        OpenBMC Maillist <openbmc@lists.ozlabs.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linux-aspeed <linux-aspeed@lists.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Paul Menzel <pmenzel@molgen.mpg.de>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Wed, 3 Nov 2021 at 01:13, Jammy Huang <jammy_huang@aspeedtech.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@aspeedtech.com>
> Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>

Reviewed-by: Joel Stanley <joel@jms.id.au>

> ---
> 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
>