Re: [PATCH v2 4/4] arm64: dts: freescale: Add panel overlay for Variscite DART

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Shawn,

On Mon, Nov 27, 2023 at 11:16:31AM +0800, Shawn Guo wrote:
> On Wed, Oct 25, 2023 at 07:50:58PM +0300, Laurent Pinchart wrote:
> > Add a DT overlay for the Variscite i.MX8MP DT8MCustomBoard that models
> > the GKTW70SDAE4SE LVDS panel found in the evaluation kit.
> > 
> > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> 
> It doesn't apply to imx/dt64 branch, and I managed to manually apply it.

I'll submit a v3 based on that branch.

> However, here is what I'm getting from 'make ARCH=arm64 dtbs'.
> 
> ../arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtso:54.3-16: Warning (reg_format): /fragment@1/__overlay__/touch@38:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
> arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtbo: Warning (pci_device_reg): Failed prerequisite 'reg_format'
> arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtbo: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
> arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtbo: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
> arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtbo: Warning (spi_bus_reg): Failed prerequisite 'reg_format'
> ../arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtso:52.11-68.4: Warning (avoid_default_addr_size): /fragment@1/__overlay__/touch@38: Relying on default #address-cells value
> ../arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtso:52.11-68.4: Warning (avoid_default_addr_size): /fragment@1/__overlay__/touch@38: Relying on default #size-cells value
> arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtbo: Warning (graph_port): /fragment@3: graph port node name should be 'port'
> ../arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtso:85.15-87.3: Warning (graph_endpoint): /fragment@3/__overlay__: graph endpoint node name should be 'endpoint'
> ../arch/arm64/boot/dts/freescale/imx8mp-var-dart-panel-gktw70sdae4se.dtso:85.15-87.3: Warning (graph_endpoint): /fragment@3/__overlay__: graph connection to node '/fragment@0/__overlay__/panel/port/endpoint' is not bidirectional

Is that unexpected ? My understanding is that the DT compiler doesn't
have enough information when compiling an overlay to validate the device
tree, as it looks at the overlay only, without considering the base DT
on which the overlay will apply.

-- 
Regards,

Laurent Pinchart