Re: LVDS panel compatible strings

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On Fri, Jul 14, 2023 at 06:00:43PM +0300, Svyatoslav Ryhel wrote:
> пт, 14 лип. 2023 р. о 17:38 Thierry Reding <thierry.reding@xxxxxxxxx> пише:
> >
> > Hi everyone,
> >
> > I've been working on converting all Tegra-related device tree bindings
> > to json-schema so that eventually we can fully validate device tree
> > files. Getting all the bindings reviewed and merged has been slow, but
> > I have a local tree where pretty much all validation errors and warnings
> > have been fixed. The remaining warnings that I'm not sure how to resolve
> > are these:
> >
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-tilapia-E1565.dtb: display-panel: compatible:0: 'panel-lvds' is not one of ['auo,b101ew05', 'tbs,a711-panel']
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-tilapia-E1565.dtb: display-panel: compatible: ['panel-lvds'] is too short
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-tilapia-E1565.dtb: display-panel: Unevaluated properties are not allowed ('compatible' was unexpected)
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-grouper-E1565.dtb: display-panel: compatible:0: 'panel-lvds' is not one of ['auo,b101ew05', 'tbs,a711-panel']
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-grouper-E1565.dtb: display-panel: compatible: ['panel-lvds'] is too short
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-grouper-E1565.dtb: display-panel: Unevaluated properties are not allowed ('compatible' was unexpected)
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-grouper-PM269.dtb: display-panel: compatible:0: 'panel-lvds' is not one of ['auo,b101ew05', 'tbs,a711-panel']
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-grouper-PM269.dtb: display-panel: compatible: ['panel-lvds'] is too short
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-grouper-PM269.dtb: display-panel: Unevaluated properties are not allowed ('compatible' was unexpected)
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dtb: display-panel: compatible:0: 'panel-lvds' is not one of ['auo,b101ew05', 'tbs,a711-panel']
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dtb: display-panel: compatible: ['panel-lvds'] is too short
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> >     arch/arm/boot/dts/nvidia/tegra30-pegatron-chagall.dtb: display-panel: Unevaluated properties are not allowed ('compatible' was unexpected)
> >         from schema $id: http://devicetree.org/schemas/display/panel/panel-lvds.yaml#
> 
> Hello Thierry! Pegatron Chagall uses a Hannstar similar to one used in
> ASUS TF201 but unfortunately it is not compatible with existing simple
> panel setup (blurry image if used). My assumption is that chagall as
> different revision of this panel like HSD101PWW3-B00 or
> HSD101PWW1-A00 which is more likely or panel is highly modified which
> is unlikely. I propose to use "hannstar,hsd101pww1" which is more wide
> spread.

Interesting. So is the problem the HSD101PWW2 timings that are off, or
is it because the panel-lvds code does something special to make this
blurry image go away?

Thierry

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