LVDS panel compatible strings

[Thierry Reding <thierry.reding@gmail.com>]

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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#

The reason for these is that the device tree files use:

	compatible = "panel-lvds";

but that's not valid as per the bindings. So what we really want is a
specific compatible string that specifies the exact panel that each of
these devices uses in addition to the "panel-lvds" fallback. Do you guys
have information about these that could help fix up the DT files?

Thanks,
Thierry

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