[PATCH] drm/panel: ilitek-ili9881c: Fix warning with GPIO controllers that sleep

[Laurent Pinchart]

Hi Neil,

On Mon, Mar 18, 2024 at 10:03:21AM +0100, Neil Armstrong wrote:
> On 17/03/2024 16:48, Laurent Pinchart wrote:
> > The ilitek-ili9881c controls the reset GPIO using the non-sleeping
> > gpiod_set_value() function. This complains loudly when the GPIO
> > controller needs to sleep. As the caller can sleep, use
> > gpiod_set_value_cansleep() to fix the issue.
> 
> Seems something buggy happened to the patchset, this patch doesn't appear
> in the cover letter and insn't numbered...

I've sent it separately, as it's functionally independent from the small
series for the same driver.

> > Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> > ---
> >   drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 6 +++---
> >   1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> > index 80b386f91320..084c37fa7348 100644
> > --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> > +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> > @@ -1276,10 +1276,10 @@ static int ili9881c_prepare(struct drm_panel *panel)
> >   	msleep(5);
> >   
> >   	/* And reset it */
> > -	gpiod_set_value(ctx->reset, 1);
> > +	gpiod_set_value_cansleep(ctx->reset, 1);
> >   	msleep(20);
> >   
> > -	gpiod_set_value(ctx->reset, 0);
> > +	gpiod_set_value_cansleep(ctx->reset, 0);
> >   	msleep(20);
> >   
> >   	for (i = 0; i < ctx->desc->init_length; i++) {
> > @@ -1334,7 +1334,7 @@ static int ili9881c_unprepare(struct drm_panel *panel)
> >   
> >   	mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
> >   	regulator_disable(ctx->power);
> > -	gpiod_set_value(ctx->reset, 1);
> > +	gpiod_set_value_cansleep(ctx->reset, 1);
> >   
> >   	return 0;
> >   }
> 
> Anyway:
> Reviewed-by: Neil Armstrong <neil.armstrong at linaro.org>

-- 
Regards,

Laurent Pinchart