linux-kernel - Re: [PATCH v2 2/3] drm/bridge: parade-ps8640: Move real poweroff action to new function

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Date:   Fri, 19 Nov 2021 14:19:48 +0100
From:   Robert Foss <robert.foss@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
        a.hajda@...sung.com, narmstrong@...libre.com,
        laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...il.com, airlied@...ux.ie, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org, kernel@...labora.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] drm/bridge: parade-ps8640: Move real poweroff
 action to new function

Hey Angelo,

On Wed, 10 Nov 2021 at 13:46, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Il 10/11/21 13:44, Dafna Hirschfeld ha scritto:
> >
> >
> > On 02.11.21 11:36, AngeloGioacchino Del Regno wrote:
> >> In preparation for varying the poweron error handling in function
> >> ps8640_bridge_poweron(), move function ps8640_bridge_poweroff() up
> >> and also move the actual logic to power off the chip to a new
> >> __ps8640_bridge_poweroff() function.
> >>
> >> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> >> ---
> >>   drivers/gpu/drm/bridge/parade-ps8640.c | 37 ++++++++++++++------------
> >>   1 file changed, 20 insertions(+), 17 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c
> >> b/drivers/gpu/drm/bridge/parade-ps8640.c
> >> index 8c5402947b3c..41f5d511d516 100644
> >> --- a/drivers/gpu/drm/bridge/parade-ps8640.c
> >> +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> >> @@ -293,6 +293,26 @@ static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge,
> >>       return 0;
> >>   }
> >> +static void __ps8640_bridge_poweroff(struct ps8640 *ps_bridge)
> >> +{
> >> +    gpiod_set_value(ps_bridge->gpio_reset, 1);
> >> +    gpiod_set_value(ps_bridge->gpio_powerdown, 1);
> >> +    if (regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),
> >> +                   ps_bridge->supplies)) {
> >> +        DRM_ERROR("cannot disable regulators\n");
> >> +    }
> >
> > That '{' is redundant
> >
> > Thanks,
> > Danfa
> >
>
> Hi Dafna,
> the braces were added as a way to increase human readability.

Not to bikeshed this, but the kernel style guide is clear about this.
No unneeded braces should be used where a single statement will do.