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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: John Stultz <john.stultz@linaro.org>
Cc: lkml <linux-kernel@vger.kernel.org>, David Airlie <airlied@linux.ie>,
        Archit Taneja <architt@codeaurora.org>,
        Wolfram Sang <wsa+renesas@sang-engineering.com>,
        Lars-Peter Clausen <lars@metafoo.de>, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 5/6] drm/bridge: adv7511: Reuse __adv7511_power_on/off() when probing EDID
Date: Thu, 19 Jan 2017 01:05:12 +0200
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Hi John,

Thank you for the patch.

On Monday 16 Jan 2017 16:52:51 John Stultz wrote:
> Thus this patch changes the EDID probing logic so that we
> re-use the __adv7511_power_on/off() calls instead of duplciating
> logic.
> 
> This does change behavior slightly as it adds the HPD signal
> pulse to the EDID probe path, but Archit has had a patch to
> add HPD signal pulse to the EDID probe path before, so this
> should address the cases where that helped.

You should also mentioned that the power off path now calls 
regcache_mark_dirty(). Apart from that,

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

> Cc: David Airlie <airlied@linux.ie>
> Cc: Archit Taneja <architt@codeaurora.org>
> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Cc: Lars-Peter Clausen <lars@metafoo.de>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
> v4: Reworded commit message, focusing on re-use and HPD pulse
>     behavior change.
> ---
>  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 17 +++--------------
>  1 file changed, 3 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 12f2876..d216f61
> 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -573,24 +573,13 @@ static int adv7511_get_modes(struct adv7511 *adv7511,
>  	unsigned int count;
> 
>  	/* Reading the EDID only works if the device is powered */
> -	if (!adv7511->powered) {
> -		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
> -				   ADV7511_POWER_POWER_DOWN, 0);
> -		if (adv7511->i2c_main->irq) {
> -			regmap_write(adv7511->regmap, 
ADV7511_REG_INT_ENABLE(0),
> -				     ADV7511_INT0_EDID_READY);
> -			regmap_write(adv7511->regmap, 
ADV7511_REG_INT_ENABLE(1),
> -				     ADV7511_INT1_DDC_ERROR);
> -		}
> -		adv7511->current_edid_segment = -1;
> -	}
> +	if (!adv7511->powered)
> +		__adv7511_power_on(adv7511);
> 
>  	edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
> 
>  	if (!adv7511->powered)
> -		regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
> -				   ADV7511_POWER_POWER_DOWN,
> -				   ADV7511_POWER_POWER_DOWN);
> +		__adv7511_power_off(adv7511);
> 
>  	kfree(adv7511->edid);
>  	adv7511->edid = edid;

-- 
Regards,

Laurent Pinchart