linux-kernel - Re: [PATCH 4/6] staging/fbtft: Stop using BL_CORE

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Date:   Wed, 17 Jan 2018 16:50:49 +0000
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Daniel Vetter <daniel.vetter@...ll.ch>,
        DRI Development <dri-devel@...ts.freedesktop.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Daniel Vetter <daniel.vetter@...el.com>
Subject: Re: [PATCH 4/6] staging/fbtft: Stop using BL_CORE_DRIVER1

On 17/01/18 14:01, Daniel Vetter wrote:
> Leaking driver internal tracking into the already massively confusing
> backlight power tracking is really confusing.
> 
> Luckily we have already a drvdata structure, so fixing this is really
> easy.
> 
> Cc: Lee Jones <lee.jones@...aro.org>
> Cc: Daniel Thompson <daniel.thompson@...aro.org>
> Cc: Jingoo Han <jingoohan1@...il.com>
> Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>

Acked-by: Daniel Thompson <daniel.thompson@...aro.org>


> ---
>   drivers/staging/fbtft/fbtft-core.c | 4 ++--
>   drivers/staging/fbtft/fbtft.h      | 1 +
>   2 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
> index 6d0363deba61..448929cc7ba1 100644
> --- a/drivers/staging/fbtft/fbtft-core.c
> +++ b/drivers/staging/fbtft/fbtft-core.c
> @@ -255,7 +255,7 @@ static int fbtft_request_gpios_dt(struct fbtft_par *par)
>   static int fbtft_backlight_update_status(struct backlight_device *bd)
>   {
>   	struct fbtft_par *par = bl_get_data(bd);
> -	bool polarity = !!(bd->props.state & BL_CORE_DRIVER1);
> +	bool polarity = par->polarity;
>   
>   	fbtft_par_dbg(DEBUG_BACKLIGHT, par,
>   		"%s: polarity=%d, power=%d, fb_blank=%d\n",
> @@ -305,7 +305,7 @@ void fbtft_register_backlight(struct fbtft_par *par)
>   	/* Assume backlight is off, get polarity from current state of pin */
>   	bl_props.power = FB_BLANK_POWERDOWN;
>   	if (!gpio_get_value(par->gpio.led[0]))
> -		bl_props.state |= BL_CORE_DRIVER1;
> +		par->polarity = true;
>   
>   	bd = backlight_device_register(dev_driver_string(par->info->device),
>   				       par->info->device, par,
> diff --git a/drivers/staging/fbtft/fbtft.h b/drivers/staging/fbtft/fbtft.h
> index 488ab788138e..54de7cdfdff7 100644
> --- a/drivers/staging/fbtft/fbtft.h
> +++ b/drivers/staging/fbtft/fbtft.h
> @@ -240,6 +240,7 @@ struct fbtft_par {
>   	ktime_t update_time;
>   	bool bgr;
>   	void *extra;
> +	bool polarity;
>   };
>   
>   #define NUMARGS(...)  (sizeof((int[]){__VA_ARGS__})/sizeof(int))
>