linux-kernel - Re: [RESEND PATCH v3 1/3] drm/panel: refactor INNOLUX P079ZCA panel driver

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Date:   Wed, 13 Dec 2017 12:46:29 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     Lin Huang <hl@...k-chips.com>
Cc:     emil.l.velikov@...il.com, thierry.reding@...il.com,
        robh+dt@...nel.org, zyw@...k-chips.com, seanpaul@...omium.org,
        airlied@...ux.ie, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, nickey.yang@...k-chips.com,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [RESEND PATCH v3 1/3] drm/panel: refactor INNOLUX P079ZCA panel
 driver

Hi HL,

On Mon, Dec 04, 2017 at 03:17:48PM +0800, Lin Huang wrote:
> Refactor Innolux P079ZCA panel driver, let it support
> multi panel.
> 
> Signed-off-by: Lin Huang <hl@...k-chips.com>
> ---
> Changes in v2:
> - Change regulator property name to meet the panel datasheet 
> Changes in v3:
> - this patch only refactor P079ZCA panel to support multi panel, support P097PFG panel in another patch 
> 
>  drivers/gpu/drm/panel/panel-innolux-p079zca.c | 147 ++++++++++++++++++--------
>  1 file changed, 105 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
> index 6ba9344..1597744 100644
> --- a/drivers/gpu/drm/panel/panel-innolux-p079zca.c
> +++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
...

> @@ -134,12 +162,13 @@ static int innolux_panel_prepare(struct drm_panel *panel)
>  	return 0;
>  
>  poweroff:
> -	regulator_err = regulator_disable(innolux->supply);

I think 'regulator_err' is unused after this patch. Please remove it.

> -	if (regulator_err)
> -		DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
> -			      regulator_err);
> -
>  	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
> +	regulator_disable(innolux->avee);
> +disable_avdd:
> +	regulator_disable(innolux->avdd);
> +disable_vddi:
> +	regulator_disable(innolux->vddi);
> +
>  	return err;
>  }
>  

...

> @@ -209,20 +256,36 @@ static const struct drm_panel_funcs innolux_panel_funcs = {
>  };
>  
>  static const struct of_device_id innolux_of_match[] = {
> -	{ .compatible = "innolux,p079zca", },
> -	{ }

You're deleting this terminator. Please don't.

> +	{ .compatible = "innolux,p079zca",
> +	  .data = &innolux_p079zca_panel_desc
> +	},
>  };
>  MODULE_DEVICE_TABLE(of, innolux_of_match);
>  

...

Brian