[PATCH 2/2] ARM: tegra: Move panels to AUX bus

[Dmitry Osipenko]

20.12.2021 13:48, Thierry Reding пишет:
> From: Thierry Reding <treding at nvidia.com>
> 
> Move the eDP panel on Venice 2 and Nyan boards into the corresponding
> AUX bus device tree node. This allows us to avoid a nasty circular
> dependency that would otherwise be created between the DPAUX and panel
> nodes via the DDC/I2C phandle.
> 
> Signed-off-by: Thierry Reding <treding at nvidia.com>
> ---
>  arch/arm/boot/dts/tegra124-nyan-big.dts   | 15 +++++++++------
>  arch/arm/boot/dts/tegra124-nyan-blaze.dts | 15 +++++++++------
>  arch/arm/boot/dts/tegra124-venice2.dts    | 14 +++++++-------
>  3 files changed, 25 insertions(+), 19 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/tegra124-nyan-big.dts b/arch/arm/boot/dts/tegra124-nyan-big.dts
> index 1d2aac2cb6d0..fdc1d64dfff9 100644
> --- a/arch/arm/boot/dts/tegra124-nyan-big.dts
> +++ b/arch/arm/boot/dts/tegra124-nyan-big.dts
> @@ -13,12 +13,15 @@ / {
>  		     "google,nyan-big-rev1", "google,nyan-big-rev0",
>  		     "google,nyan-big", "google,nyan", "nvidia,tegra124";
>  
> -	panel: panel {
> -		compatible = "auo,b133xtn01";
> -
> -		power-supply = <&vdd_3v3_panel>;
> -		backlight = <&backlight>;
> -		ddc-i2c-bus = <&dpaux>;
> +	host1x at 50000000 {
> +		dpaux at 545c0000 {
> +			aux-bus {
> +				panel: panel {
> +					compatible = "auo,b133xtn01";
> +					backlight = <&backlight>;
> +				};
> +			};
> +		};
>  	};
>  
>  	mmc at 700b0400 { /* SD Card on this bus */
> diff --git a/arch/arm/boot/dts/tegra124-nyan-blaze.dts b/arch/arm/boot/dts/tegra124-nyan-blaze.dts
> index 677babde6460..abdf4456826f 100644
> --- a/arch/arm/boot/dts/tegra124-nyan-blaze.dts
> +++ b/arch/arm/boot/dts/tegra124-nyan-blaze.dts
> @@ -15,12 +15,15 @@ / {
>  		     "google,nyan-blaze-rev0", "google,nyan-blaze",
>  		     "google,nyan", "nvidia,tegra124";
>  
> -	panel: panel {
> -		compatible = "samsung,ltn140at29-301";
> -
> -		power-supply = <&vdd_3v3_panel>;
> -		backlight = <&backlight>;
> -		ddc-i2c-bus = <&dpaux>;
> +	host1x at 50000000 {
> +		dpaux at 545c0000 {
> +			aux-bus {
> +				panel: panel {
> +					compatible = "samsung,ltn140at29-301";
> +					backlight = <&backlight>;
> +				};
> +			};
> +		};
>  	};
>  
>  	sound {
> diff --git a/arch/arm/boot/dts/tegra124-venice2.dts b/arch/arm/boot/dts/tegra124-venice2.dts
> index 232c90604df9..6a9592ceb5f2 100644
> --- a/arch/arm/boot/dts/tegra124-venice2.dts
> +++ b/arch/arm/boot/dts/tegra124-venice2.dts
> @@ -48,6 +48,13 @@ sor at 54540000 {
>  		dpaux at 545c0000 {
>  			vdd-supply = <&vdd_3v3_panel>;
>  			status = "okay";
> +
> +			aux-bus {
> +				panel: panel {
> +					compatible = "lg,lp129qe";
> +					backlight = <&backlight>;
> +				};
> +			};
>  		};
>  	};
>  
> @@ -1080,13 +1087,6 @@ power {
>  		};
>  	};
>  
> -	panel: panel {
> -		compatible = "lg,lp129qe";
> -		power-supply = <&vdd_3v3_panel>;
> -		backlight = <&backlight>;
> -		ddc-i2c-bus = <&dpaux>;
> -	};
> -
>  	vdd_mux: regulator-mux {
>  		compatible = "regulator-fixed";
>  		regulator-name = "+VDD_MUX";
> 

You should add stable tag for 5.15 and also add separate patch to update
the new arch/arm/boot/dts/tegra124-nyan-big-fhd.dts which we have in
-next now.