[v4,05/33] dt-bindings: mediatek: add RDMA1 description for mt8183 display
diff mbox series

Message ID 1562625253-29254-6-git-send-email-yongqiang.niu@mediatek.com
State Changes Requested
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Series
  • add drm support for MT8183
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Commit Message

Yongqiang Niu July 8, 2019, 10:33 p.m. UTC
From: Yongqiang Niu <yongqiang.niu@mediatek.com>

This patch add RDMA1 description for mt8183 display

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt | 1 +
 1 file changed, 1 insertion(+)

Comments

Rob Herring July 24, 2019, 8:16 p.m. UTC | #1
On Tue, Jul 09, 2019 at 06:33:45AM +0800, yongqiang.niu@mediatek.com wrote:
> From: Yongqiang Niu <yongqiang.niu@mediatek.com>
> 
> This patch add RDMA1 description for mt8183 display
> 
> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> index afd3c90..bb9274a 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> @@ -30,6 +30,7 @@ Required properties (all function blocks):
>  	"mediatek,<chip>-disp-ovl"   		- overlay (4 layers, blending, csc)
>  	"mediatek,<chip>-disp-ovl-2l"           - overlay (2 layers, blending, csc)
>  	"mediatek,<chip>-disp-rdma"  		- read DMA / line buffer
> +	"mediatek,<chip>-disp-rdma1"            - function is same with RDMA, fifo size is different

This can't be determined by which chip it is? IOW, a chip may have both 
rdma and rdma1?

>  	"mediatek,<chip>-disp-wdma"  		- write DMA
>  	"mediatek,<chip>-disp-ccorr"            - color correction
>  	"mediatek,<chip>-disp-color" 		- color processor
> -- 
> 1.8.1.1.dirty
>
CK Hu July 25, 2019, 3:20 a.m. UTC | #2
Hi, Rob:

On Wed, 2019-07-24 at 14:16 -0600, Rob Herring wrote:
> On Tue, Jul 09, 2019 at 06:33:45AM +0800, yongqiang.niu@mediatek.com wrote:
> > From: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > 
> > This patch add RDMA1 description for mt8183 display
> > 
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > ---
> >  Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> > index afd3c90..bb9274a 100644
> > --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> > +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> > @@ -30,6 +30,7 @@ Required properties (all function blocks):
> >  	"mediatek,<chip>-disp-ovl"   		- overlay (4 layers, blending, csc)
> >  	"mediatek,<chip>-disp-ovl-2l"           - overlay (2 layers, blending, csc)
> >  	"mediatek,<chip>-disp-rdma"  		- read DMA / line buffer
> > +	"mediatek,<chip>-disp-rdma1"            - function is same with RDMA, fifo size is different
> 
> This can't be determined by which chip it is? IOW, a chip may have both 
> rdma and rdma1?

In MT8183, there are two different rdma. The difference is the fifo size
in each one. I've a question: is it better to have two compatible string
for each one, or just one compatible string for both but with a property
to set fifo size?

Regards,
CK

> 
> >  	"mediatek,<chip>-disp-wdma"  		- write DMA
> >  	"mediatek,<chip>-disp-ccorr"            - color correction
> >  	"mediatek,<chip>-disp-color" 		- color processor
> > -- 
> > 1.8.1.1.dirty
> >
Rob Herring July 25, 2019, 10:23 p.m. UTC | #3
On Wed, Jul 24, 2019 at 9:20 PM CK Hu <ck.hu@mediatek.com> wrote:
>
> Hi, Rob:
>
> On Wed, 2019-07-24 at 14:16 -0600, Rob Herring wrote:
> > On Tue, Jul 09, 2019 at 06:33:45AM +0800, yongqiang.niu@mediatek.com wrote:
> > > From: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > >
> > > This patch add RDMA1 description for mt8183 display
> > >
> > > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > > ---
> > >  Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> > > index afd3c90..bb9274a 100644
> > > --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> > > +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> > > @@ -30,6 +30,7 @@ Required properties (all function blocks):
> > >     "mediatek,<chip>-disp-ovl"              - overlay (4 layers, blending, csc)
> > >     "mediatek,<chip>-disp-ovl-2l"           - overlay (2 layers, blending, csc)
> > >     "mediatek,<chip>-disp-rdma"             - read DMA / line buffer
> > > +   "mediatek,<chip>-disp-rdma1"            - function is same with RDMA, fifo size is different
> >
> > This can't be determined by which chip it is? IOW, a chip may have both
> > rdma and rdma1?
>
> In MT8183, there are two different rdma. The difference is the fifo size
> in each one. I've a question: is it better to have two compatible string
> for each one, or just one compatible string for both but with a property
> to set fifo size?

If that's the only diff, then a property for fifo size is fine. We
just don't want to be adding a new property for each new difference.

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
index afd3c90..bb9274a 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
@@ -30,6 +30,7 @@  Required properties (all function blocks):
 	"mediatek,<chip>-disp-ovl"   		- overlay (4 layers, blending, csc)
 	"mediatek,<chip>-disp-ovl-2l"           - overlay (2 layers, blending, csc)
 	"mediatek,<chip>-disp-rdma"  		- read DMA / line buffer
+	"mediatek,<chip>-disp-rdma1"            - function is same with RDMA, fifo size is different
 	"mediatek,<chip>-disp-wdma"  		- write DMA
 	"mediatek,<chip>-disp-ccorr"            - color correction
 	"mediatek,<chip>-disp-color" 		- color processor