linux-kernel - Re: [PATCH 3/6] drm/panel: novatek-nt36672e: stop setting register load before disable

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Date: Wed, 24 Apr 2024 08:52:32 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Jessica Zhang <quic_jesszhan@...cinc.com>, Sam Ravnborg <sam@...nborg.org>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Matthias Kaehlcke <mka@...omium.org>,
 Harigovindan P <harigovi@...eaurora.org>,
 Ritesh Kumar <quic_riteshk@...cinc.com>,
 Sumit Semwal <sumit.semwal@...aro.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] drm/panel: novatek-nt36672e: stop setting register
 load before disable

On 04/04/2024 12:08, Dmitry Baryshkov wrote:
> It is pointless to set register load before disabling the register. This
> vote is going to be dropped as soon as the register is disabled. Drop
> these register_set_load calls.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---
>   drivers/gpu/drm/panel/panel-novatek-nt36672e.c | 17 -----------------
>   1 file changed, 17 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36672e.c b/drivers/gpu/drm/panel/panel-novatek-nt36672e.c
> index c39fe0fc5d69..9a870b9b6765 100644
> --- a/drivers/gpu/drm/panel/panel-novatek-nt36672e.c
> +++ b/drivers/gpu/drm/panel/panel-novatek-nt36672e.c
> @@ -25,12 +25,6 @@ static const unsigned long regulator_enable_loads[] = {
>   	100000,
>   };
>   
> -static const unsigned long regulator_disable_loads[] = {
> -	80,
> -	100,
> -	100,
> -};
> -
>   struct panel_desc {
>   	const struct drm_display_mode *display_mode;
>   	u32 width_mm;
> @@ -385,20 +379,9 @@ static int nt36672e_power_off(struct nt36672e_panel *ctx)
>   {
>   	struct mipi_dsi_device *dsi = ctx->dsi;
>   	int ret = 0;
> -	int i;
>   
>   	gpiod_set_value(ctx->reset_gpio, 0);
>   
> -	for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
> -		ret = regulator_set_load(ctx->supplies[i].consumer,
> -				regulator_disable_loads[i]);
> -		if (ret) {
> -			dev_err(&dsi->dev, "regulator set load failed for supply %s: %d\n",
> -				ctx->supplies[i].supply, ret);
> -			return ret;
> -		}
> -	}
> -
>   	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
>   	if (ret)
>   		dev_err(&dsi->dev, "regulator bulk disable failed: %d\n", ret);
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>