linux-kernel - Re: [PATCH 4/6] drm/bridge: adv7511: Rework adv7511_power_on/off() so they can be reused internally

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Date:   Thu, 19 Jan 2017 01:04:21 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        Archit Taneja <architt@...eaurora.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 4/6] drm/bridge: adv7511: Rework adv7511_power_on/off() so they can be reused internally

Hi John,

Thank you for the patch.

On Monday 16 Jan 2017 16:52:50 John Stultz wrote:
> In chasing down issues with EDID probing, I found some
> duplicated but incomplete logic used to power the chip on and
> off.
> 
> This patch refactors the adv7511_power_on/off functions, so
> they can be used for internal needs.
> 
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Archit Taneja <architt@...eaurora.org>
> Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: dri-devel@...ts.freedesktop.org
> Signed-off-by: John Stultz <john.stultz@...aro.org>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
> v4: Move the regcache_sync() call outside the shared
>     implementation as we don't want to call it on EDID probing,
>     as suggested by Laurent
> ---
>  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 405e460..12f2876
> 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -325,7 +325,7 @@ static void adv7511_set_link_config(struct adv7511
> *adv7511, adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
>  }
> 
> -static void adv7511_power_on(struct adv7511 *adv7511)
> +static void __adv7511_power_on(struct adv7511 *adv7511)
>  {
>  	adv7511->current_edid_segment = -1;
> 
> @@ -354,6 +354,11 @@ static void adv7511_power_on(struct adv7511 *adv7511)
>  	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
>  			   ADV7511_REG_POWER2_HPD_SRC_MASK,
>  			   ADV7511_REG_POWER2_HPD_SRC_NONE);
> +}
> +
> +static void adv7511_power_on(struct adv7511 *adv7511)
> +{
> +	__adv7511_power_on(adv7511);
> 
>  	/*
>  	 * Most of the registers are reset during power down or when HPD is 
low.
> @@ -362,21 +367,23 @@ static void adv7511_power_on(struct adv7511 *adv7511)
> 
>  	if (adv7511->type == ADV7533)
>  		adv7533_dsi_power_on(adv7511);
> -
>  	adv7511->powered = true;
>  }
> 
> -static void adv7511_power_off(struct adv7511 *adv7511)
> +static void __adv7511_power_off(struct adv7511 *adv7511)
>  {
>  	/* TODO: setup additional power down modes */
>  	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
>  			   ADV7511_POWER_POWER_DOWN,
>  			   ADV7511_POWER_POWER_DOWN);
>  	regcache_mark_dirty(adv7511->regmap);
> +}
> 
> +static void adv7511_power_off(struct adv7511 *adv7511)
> +{
> +	__adv7511_power_off(adv7511);
>  	if (adv7511->type == ADV7533)
>  		adv7533_dsi_power_off(adv7511);
> -
>  	adv7511->powered = false;
>  }

-- 
Regards,

Laurent Pinchart