[PATCH v2 3/3] imx-drm: parallel-display: Fix dpms mode handling

[mpa@pengutronix.de (Markus Pargmann)]

On Mon, Nov 03, 2014 at 04:19:15PM +0100, Lucas Stach wrote:
> Am Montag, den 03.11.2014, 15:54 +0100 schrieb Markus Pargmann:
> > We have to call drm_panel_prepare() and drm_panel_unprepare() when
> > switching on or off. This patch also replaces the if statement with an
> > switch statement to only catch ON and OFF modes.
> 
> ... which is wrong. A driver is expected to map all 4 DPMS states to
> something sane, so the if statement did exactly the right thing here.

Thanks for the clarification, I will rework this and send a new version.

Best regards,

Markus

> 
> Regards,
> Lucas
> 
> > 
> > Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> > ---
> >  drivers/staging/imx-drm/parallel-display.c | 14 +++++++++++---
> >  1 file changed, 11 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/staging/imx-drm/parallel-display.c b/drivers/staging/imx-drm/parallel-display.c
> > index 0992bbf01adc..62788177c9d4 100644
> > --- a/drivers/staging/imx-drm/parallel-display.c
> > +++ b/drivers/staging/imx-drm/parallel-display.c
> > @@ -106,10 +106,18 @@ static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
> >  {
> >  	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
> >  
> > -	if (mode != DRM_MODE_DPMS_ON)
> > -		drm_panel_disable(imxpd->panel);
> > -	else
> > +	switch (mode) {
> > +	case DRM_MODE_DPMS_ON:
> > +		drm_panel_prepare(imxpd->panel);
> >  		drm_panel_enable(imxpd->panel);
> > +		break;
> > +	case DRM_MODE_DPMS_OFF:
> > +		drm_panel_disable(imxpd->panel);
> > +		drm_panel_unprepare(imxpd->panel);
> > +		break;
> > +	default:
> > +		break;
> > +	}
> >  }
> >  
> >  static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
> 
> -- 
> Pengutronix e.K.             | Lucas Stach                 |
> Industrial Linux Solutions   | http://www.pengutronix.de/  |
> 
> 

-- 
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