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 16:08:10 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Robert Foss <robert.foss@...aro.org>
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

Il 19/11/21 14:19, Robert Foss ha scritto:
> 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.
> 

Hey Robert!

That's right, style rules come before personal preferences.
I'll send a v3 without the braces as soon as possible!

Cheers,
- Angelo