Re: [PATCH RESEND 1/3] drm: adv7511: really enable interrupts for EDID detection

[Wolfram Sang <wsa@the-dreams.de>]

[-- Attachment #1: Type: text/plain, Size: 1842 bytes --]

On Mon, Jan 04, 2016 at 04:37:44PM +0200, Laurent Pinchart wrote:
> Hi Wolfram,
> 
> Thank you for the patch.
> 
> On Monday 04 January 2016 03:33:45 Wolfram Sang wrote:
> > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > 
> > The interrupts for EDID_READY or DDC_ERROR were never enabled in this
> > driver, so reading EDID always timed out when chip was powered down and
> > interrupts were used. Fix this and remove clearing the interrupt flags,
> > they are cleared in POWER_DOWN mode anyhow (according to docs and my
> > tests).
> > 
> > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > ---
> >  drivers/gpu/drm/i2c/adv7511.c | 25 +++++++++++++++++--------
> >  1 file changed, 17 insertions(+), 8 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
> > index 00416f23b5cb5f..85e994796d96a4 100644
> > --- a/drivers/gpu/drm/i2c/adv7511.c
> > +++ b/drivers/gpu/drm/i2c/adv7511.c
> > @@ -362,12 +362,19 @@ static void adv7511_power_on(struct adv7511 *adv7511)
> >  {
> >  	adv7511->current_edid_segment = -1;
> > 
> > -	regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
> > -		     ADV7511_INT0_EDID_READY);
> > -	regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
> > -		     ADV7511_INT1_DDC_ERROR);
> >  	regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
> >  			   ADV7511_POWER_POWER_DOWN, 0);
> > +	if (adv7511->i2c_main->irq) {
> > +		/*
> > +		 * Documentation says the INT_ENABLE registers are reset in
> > +		 * POWER_DOWN mode. My tests with a 7511w show something else
> > +		 * but let's stick to the documentation.
> 
> This contradicts the commit message, which one is correct ?

As Geert mentioned, the commit message refers to the interrupt flags not
the interrupt_enable flags.

Shall I rephrase?


[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]