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

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Message-ID: <20190712162117.GB18990@ravnborg.org>
Date:   Fri, 12 Jul 2019 18:21:17 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Nicolas.Ferre@...rochip.com,
        Joshua Henderson <joshua.henderson@...rochip.com>
Cc:     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

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.

	Sam