[PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

[PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

[Liu Ying]

Some simple panels have dual LVDS interfaces which receive even and odd
pixels respectively, like 'nlt,nl192108ac18-02d' and 'koe,tx26d202vm0bwa'.
So, let's allow optional 'ports' property so that pixel order can be got
via drm_of_lvds_get_dual_link_pixel_order() if it's child nodes 'port@0'
and 'port@1' contain 'dual-lvds-even-pixels' and 'dual-lvds-odd-pixels'
properties respectively.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
 Documentation/devicetree/bindings/display/panel/panel-simple.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
index f9750b0..5ccb22b 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -288,6 +288,7 @@ properties:
   backlight: true
   enable-gpios: true
   port: true
+  ports: true
   power-supply: true
 
 additionalProperties: false
-- 
2.7.4

Re: [PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

[Sam Ravnborg]

Hi Liu Ying

On Wed, Nov 04, 2020 at 04:03:37PM +0800, Liu Ying wrote:
> Some simple panels have dual LVDS interfaces which receive even and odd
> pixels respectively, like 'nlt,nl192108ac18-02d' and 'koe,tx26d202vm0bwa'.
> So, let's allow optional 'ports' property so that pixel order can be got
> via drm_of_lvds_get_dual_link_pixel_order() if it's child nodes 'port@0'
> and 'port@1' contain 'dual-lvds-even-pixels' and 'dual-lvds-odd-pixels'
> properties respectively.

A panel with dual LVDS interfaces is no longer in the "simple" category.
The panel-simple binding shall be limited to the simple pnales only.

This is also why we have for example panel-simple-dsi binding.

Please consider either a binding dedicated for the dual port displays or
a dedicated binding for the specific panel.

I trust that if other readers of this mail disagrees with this
recommendation that they will speak up.

	Sam

> 
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Rob Herring <robh+dt@kernel.org>
> Signed-off-by: Liu Ying <victor.liu@nxp.com>
> ---
>  Documentation/devicetree/bindings/display/panel/panel-simple.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> index f9750b0..5ccb22b 100644
> --- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> @@ -288,6 +288,7 @@ properties:
>    backlight: true
>    enable-gpios: true
>    port: true
> +  ports: true
>    power-supply: true
>  
>  additionalProperties: false
> -- 
> 2.7.4

Re: [PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

[Liu Ying]

Hi Sam,

On Wed, 2020-11-04 at 11:47 +0100, Sam Ravnborg wrote:
> Hi Liu Ying
> 
> On Wed, Nov 04, 2020 at 04:03:37PM +0800, Liu Ying wrote:
> > Some simple panels have dual LVDS interfaces which receive even and
> > odd
> > pixels respectively, like 'nlt,nl192108ac18-02d' and
> > 'koe,tx26d202vm0bwa'.
> > So, let's allow optional 'ports' property so that pixel order can
> > be got
> > via drm_of_lvds_get_dual_link_pixel_order() if it's child nodes 
> > 'port@0'
> > and 'port@1' contain 'dual-lvds-even-pixels' and 'dual-lvds-odd-
> > pixels'
> > properties respectively.
> 
> A panel with dual LVDS interfaces is no longer in the "simple"
> category.
> The panel-simple binding shall be limited to the simple pnales only.
> 
> This is also why we have for example panel-simple-dsi binding.
> 
> Please consider either a binding dedicated for the dual port displays
> or

Thanks for your review.

Does a new 'panel-simple-lvds-dual-ports.yaml' binding look ok?
I assume it would inherit all properties of panel-simple.yaml and all
existing compatibles of LVDS panels with dual ports in
panel-simple.yaml can be moved to it.

> a dedicated binding for the specific panel.
> 
> I trust that if other readers of this mail disagrees with this
> recommendation that they will speak up.
> 
> 	Sam
> 
> > Cc: Thierry Reding <thierry.reding@gmail.com>
> > Cc: Sam Ravnborg <sam@ravnborg.org>
> > Cc: David Airlie <airlied@linux.ie>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > Cc: Rob Herring <robh+dt@kernel.org>
> > Signed-off-by: Liu Ying <victor.liu@nxp.com>
> > ---
> >  Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> > | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/panel/panel-
> > simple.yaml
> > b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> > index f9750b0..5ccb22b 100644
> > --- a/Documentation/devicetree/bindings/display/panel/panel-
> > simple.yaml
> > +++ b/Documentation/devicetree/bindings/display/panel/panel-
> > simple.yaml
> > @@ -288,6 +288,7 @@ properties:
> >    backlight: true
> >    enable-gpios: true
> >    port: true
> > +  ports: true
> >    power-supply: true
> >  
> >  additionalProperties: false
> > -- 
> > 2.7.4
-- 
 Liu Ying

Re: [PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

[Sam Ravnborg]

Hi Liu Ying,
On Tue, Nov 10, 2020 at 10:37:27AM +0800, Liu Ying wrote:
> Hi Sam,
> 
> On Wed, 2020-11-04 at 11:47 +0100, Sam Ravnborg wrote:
> > Hi Liu Ying
> > 
> > On Wed, Nov 04, 2020 at 04:03:37PM +0800, Liu Ying wrote:
> > > Some simple panels have dual LVDS interfaces which receive even and
> > > odd
> > > pixels respectively, like 'nlt,nl192108ac18-02d' and
> > > 'koe,tx26d202vm0bwa'.
> > > So, let's allow optional 'ports' property so that pixel order can
> > > be got
> > > via drm_of_lvds_get_dual_link_pixel_order() if it's child nodes 
> > > 'port@0'
> > > and 'port@1' contain 'dual-lvds-even-pixels' and 'dual-lvds-odd-
> > > pixels'
> > > properties respectively.
> > 
> > A panel with dual LVDS interfaces is no longer in the "simple"
> > category.
> > The panel-simple binding shall be limited to the simple pnales only.
> > 
> > This is also why we have for example panel-simple-dsi binding.
> > 
> > Please consider either a binding dedicated for the dual port displays
> > or
> 
> Thanks for your review.
> 
> Does a new 'panel-simple-lvds-dual-ports.yaml' binding look ok?
> I assume it would inherit all properties of panel-simple.yaml and all
> existing compatibles of LVDS panels with dual ports in
> panel-simple.yaml can be moved to it.

Yes, that would be fine. If possible we shall have similar panels
described by the same binding.

Try to send out the binding for review early before starting to move too
much around - so we can get an early look at it at see if this is indeed
the right direction to go.

	Sam

Re: [PATCH] dt-bindings: display: panel-simple: Allow optional 'ports' property

[Liu Ying]

On Tue, 2020-11-10 at 06:53 +0100, Sam Ravnborg wrote:
> Hi Liu Ying,
> On Tue, Nov 10, 2020 at 10:37:27AM +0800, Liu Ying wrote:
> > Hi Sam,
> > 
> > On Wed, 2020-11-04 at 11:47 +0100, Sam Ravnborg wrote:
> > > Hi Liu Ying
> > > 
> > > On Wed, Nov 04, 2020 at 04:03:37PM +0800, Liu Ying wrote:
> > > > Some simple panels have dual LVDS interfaces which receive even
> > > > and
> > > > odd
> > > > pixels respectively, like 'nlt,nl192108ac18-02d' and
> > > > 'koe,tx26d202vm0bwa'.
> > > > So, let's allow optional 'ports' property so that pixel order
> > > > can
> > > > be got
> > > > via drm_of_lvds_get_dual_link_pixel_order() if it's child
> > > > nodes 
> > > > 'port@0'
> > > > and 'port@1' contain 'dual-lvds-even-pixels' and 'dual-lvds-
> > > > odd-
> > > > pixels'
> > > > properties respectively.
> > > 
> > > A panel with dual LVDS interfaces is no longer in the "simple"
> > > category.
> > > The panel-simple binding shall be limited to the simple pnales
> > > only.
> > > 
> > > This is also why we have for example panel-simple-dsi binding.
> > > 
> > > Please consider either a binding dedicated for the dual port
> > > displays
> > > or
> > 
> > Thanks for your review.
> > 
> > Does a new 'panel-simple-lvds-dual-ports.yaml' binding look ok?
> > I assume it would inherit all properties of panel-simple.yaml and
> > all
> > existing compatibles of LVDS panels with dual ports in
> > panel-simple.yaml can be moved to it.
> 
> Yes, that would be fine. If possible we shall have similar panels
> described by the same binding.
> 
> Try to send out the binding for review early before starting to move
> too
> much around - so we can get an early look at it at see if this is
> indeed
> the right direction to go.

Yes. I've sent out one for review:

https://lists.freedesktop.org/archives/dri-devel/2020-November/286482.html

> 
> 	Sam
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
-- 
 Liu Ying