linux-kernel - Re: [PATCH v22 2/2] drm/bridge: Add I2C based driver for ps8640 bridge

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Message-ID: <CANMq1KA4mp648p1LicOzAyra6tdgN2qdDY=N0XyDYhgt6BP26w@mail.gmail.com>
Date:   Mon, 23 Dec 2019 17:14:41 +0800
From:   Nicolas Boichat <drinkcat@...omium.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Collabora Kernel ML <kernel@...labora.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Jitao Shi <jitao.shi@...iatek.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Ulrich Hecht <uli@...nd.eu>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Jonas Karlman <jonas@...boo.se>,
        dri-devel@...ts.freedesktop.org,
        Neil Armstrong <narmstrong@...libre.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        David Airlie <airlied@...ux.ie>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v22 2/2] drm/bridge: Add I2C based driver for ps8640 bridge

On Mon, Dec 23, 2019 at 3:10 PM Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
>
> Hi Nicolas,
>
> Many thanks for you review. Just preparing a new version with your comments
> addressed.
>
> On 20/12/19 9:44, Nicolas Boichat wrote:
> > On Fri, Dec 20, 2019 at 4:17 PM Enric Balletbo i Serra
> > <enric.balletbo@...labora.com> wrote:
> >>
> >> From: Jitao Shi <jitao.shi@...iatek.com>
> >>
> >> This patch adds drm_bridge driver for parade DSI to eDP bridge chip.
> >>
> >> Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> >> Reviewed-by: Daniel Kurtz <djkurtz@...omium.org>
> >> Reviewed-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> >> [uli: followed API changes, removed FW update feature]
> >> Signed-off-by: Ulrich Hecht <uli@...nd.eu>
> >> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> >> ---
> [snip]
> >> +       ret = i2c_smbus_write_byte_data(client, PAGE2_MCS_EN,
> >> +                                       status & ~MCS_EN);
> >> +       if (ret < 0) {
> >> +               DRM_ERROR("failed write PAGE2_MCS_EN: %d\n", ret);
> >> +               goto err_regulators_disable;
> >> +       }
> >> +
> >> +       ret = ps8640_bridge_unmute(ps_bridge);
> >> +       if (ret)
> >> +               DRM_ERROR("failed to enable unmutevideo: %d\n", ret);
> >
> > failed to unmute? Or failed to enable?
> >
>
> failed to unmute sound more clear to me.

I may be wrong, but I have the feeling that the functions
"mute/unmute" video/display, actually... And that the function naming
is strange...

You could just try to remove the calls, as there is no audio on the
board you have (elm), so if video still works, maybe this is actually
audio ,-)

Thanks,