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

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Date:   Wed, 10 Nov 2021 14:44:09 +0200
From:   Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, a.hajda@...sung.com
Cc:     narmstrong@...libre.com, robert.foss@...aro.org,
        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



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

> +}
> +
> +static void ps8640_bridge_poweroff(struct ps8640 *ps_bridge)
> +{
> +	if (!ps_bridge->powered)
> +		return;
> +
> +	__ps8640_bridge_poweroff(ps_bridge);
> +
> +	ps_bridge->powered = false;
> +}
> +
>   static int ps8640_bridge_poweron(struct ps8640 *ps_bridge)
>   {
>   	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];
> @@ -361,23 +381,6 @@ static int ps8640_bridge_poweron(struct ps8640 *ps_bridge)
>   	return ret;
>   }
>   
> -static void ps8640_bridge_poweroff(struct ps8640 *ps_bridge)
> -{
> -	int ret;
> -
> -	if (!ps_bridge->powered)
> -		return;
> -
> -	gpiod_set_value(ps_bridge->gpio_reset, 1);
> -	gpiod_set_value(ps_bridge->gpio_powerdown, 1);
> -	ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),
> -				     ps_bridge->supplies);
> -	if (ret < 0)
> -		DRM_ERROR("cannot disable regulators %d\n", ret);
> -
> -	ps_bridge->powered = false;
> -}
> -
>   static void ps8640_pre_enable(struct drm_bridge *bridge)
>   {
>   	struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
>