linux-kernel - Re: [PATCH] drm/atmel-hlcdc: set layer REP bit to enable replication logic

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Date:   Fri, 12 Jul 2019 18:27:39 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Nicolas.Ferre@...rochip.com,
        Joshua Henderson <joshua.henderson@...rochip.com>,
        bbrezillon@...nel.org, airlied@...ux.ie,
        alexandre.belloni@...tlin.com,
        linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/atmel-hlcdc: set layer REP bit to enable
 replication logic

On Fri, 12 Jul 2019 18:21:17 +0200
Sam Ravnborg <sam@...nborg.org> wrote:

> Hi Joshua.
> 
> On Tue, Jul 09, 2019 at 04:24:49PM +0000, Nicolas.Ferre@...rochip.com wrote:
> > On 09/07/2019 at 17:35, Joshua Henderson wrote:  
> > > This bit enables replication logic to expand an RGB color less than 24
> > > bits, to 24 bits, which is used internally for all formats.  Otherwise,
> > > the least significant bits are always set to zero and the color may not
> > > be what is expected.
> > > 
> > > Signed-off-by: Joshua Henderson <joshua.henderson@...rochip.com>  
> > 
> > Acked-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
> > 
> > Here is patchwork entry:
> > https://patchwork.kernel.org/patch/11037167/
> > 
> > Thanks, best regards,
> >    Nicolas
> >   
> > > ---
> > >   drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
> > > index eb7c4cf..6f6cf61 100644
> > > --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
> > > +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
> > > @@ -389,7 +389,7 @@ atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
> > >   	atmel_hlcdc_layer_write_cfg(&plane->layer, ATMEL_HLCDC_LAYER_DMA_CFG,
> > >   				    cfg);
> > >   
> > > -	cfg = ATMEL_HLCDC_LAYER_DMA;
> > > +	cfg = ATMEL_HLCDC_LAYER_DMA | ATMEL_HLCDC_LAYER_REP;
> > >   
> > >   	if (plane->base.type != DRM_PLANE_TYPE_PRIMARY) {
> > >   		cfg |= ATMEL_HLCDC_LAYER_OVR | ATMEL_HLCDC_LAYER_ITER2BL |  
> 
> Thanks - this gave me an opportunity to read a bit more in the datasheet
> of the controller.
> Applied to drm-misc-next with Ack from Nicolas.

I was about to add my R-b and ask you to apply the patch :-). I'm glad
you didn't wait for my feedback to apply the fix, that means I'll be
able to remove my name from the Atmel HLCDC entry soon ;-).

> 
> 	Sam