[2/2] ARM: dts: exynos: tiny4412: add proper panel node
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Message ID 20200106191003.21584-2-tiny.windzz@gmail.com
State New
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Series
  • [1/2] ARM: dts: exynos: tiny4412: add fimd node
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Commit Message

Frank Lee Jan. 6, 2020, 7:10 p.m. UTC
This patch add at070tn92 panel for tiny4412 board.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
---
 arch/arm/boot/dts/exynos4412-tiny4412.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

Comments

Krzysztof Kozlowski Jan. 7, 2020, 9:04 a.m. UTC | #1
On Mon, Jan 06, 2020 at 07:10:03PM +0000, Yangtao Li wrote:
> This patch add at070tn92 panel for tiny4412 board.

Please fix description as in patch 1.

> 
> Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
> ---
>  arch/arm/boot/dts/exynos4412-tiny4412.dts | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynos4412-tiny4412.dts
> index 2b62cb27420c..57f9d09233ad 100644
> --- a/arch/arm/boot/dts/exynos4412-tiny4412.dts
> +++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts
> @@ -66,6 +66,16 @@
>  			clock-frequency = <24000000>;
>  		};
>  	};
> +
> +	panel {
> +		compatible = "innolux,at070tn92";
> +
> +		port {
> +			panel_input: endpoint {
> +				remote-endpoint = <&lcdc_output>;
> +			};
> +		};
> +	};
>  };
>  
>  &fimd {
> @@ -74,6 +84,12 @@
>  	#address-cells = <1>;
>  	#size-cells = <0>;
>  	status = "okay";

One empty space here.

> +	port@3 {
> +		reg = <3>;

Why starting from "3"? Why this is port@3, not just "port"?

Best regards,
Krzysztof
Frank Lee Jan. 7, 2020, 7:07 p.m. UTC | #2
On Tue, Jan 7, 2020 at 5:04 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> On Mon, Jan 06, 2020 at 07:10:03PM +0000, Yangtao Li wrote:
> > This patch add at070tn92 panel for tiny4412 board.
>
> Please fix description as in patch 1.
>
> >
> > Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
> > ---
> >  arch/arm/boot/dts/exynos4412-tiny4412.dts | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynos4412-tiny4412.dts
> > index 2b62cb27420c..57f9d09233ad 100644
> > --- a/arch/arm/boot/dts/exynos4412-tiny4412.dts
> > +++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts
> > @@ -66,6 +66,16 @@
> >                       clock-frequency = <24000000>;
> >               };
> >       };
> > +
> > +     panel {
> > +             compatible = "innolux,at070tn92";
> > +
> > +             port {
> > +                     panel_input: endpoint {
> > +                             remote-endpoint = <&lcdc_output>;
> > +                     };
> > +             };
> > +     };
> >  };
> >
> >  &fimd {
> > @@ -74,6 +84,12 @@
> >       #address-cells = <1>;
> >       #size-cells = <0>;
> >       status = "okay";
>
> One empty space here.
>
> > +     port@3 {
> > +             reg = <3>;
>
> Why starting from "3"? Why this is port@3, not just "port"?

From samsung-fimd.txt:
---
The device node can contain 'port' child nodes according to the bindings defined
in [2]. The following are properties specific to those nodes:
- reg: (required) port index, can be:
                0 - for CAMIF0 input,
                1 - for CAMIF1 input,
                2 - for CAMIF2 input,
                3 - for parallel output,
                4 - for write-back interface
---

I guess it is influenced here.
https://elixir.bootlin.com/linux/v5.5-rc5/source/drivers/gpu/drm/exynos/exynos_drm_dpi.c#L170
Without it, lcd is completely black.

Your,
Yangtao

>
> Best regards,
> Krzysztof
>
Krzysztof Kozlowski Jan. 8, 2020, 7:59 a.m. UTC | #3
On Wed, Jan 08, 2020 at 03:07:25AM +0800, Frank Lee wrote:
> On Tue, Jan 7, 2020 at 5:04 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
> >
> > On Mon, Jan 06, 2020 at 07:10:03PM +0000, Yangtao Li wrote:
> > > This patch add at070tn92 panel for tiny4412 board.
> >
> > Please fix description as in patch 1.
> >
> > >
> > > Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
> > > ---
> > >  arch/arm/boot/dts/exynos4412-tiny4412.dts | 16 ++++++++++++++++
> > >  1 file changed, 16 insertions(+)
> > >
> > > diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynos4412-tiny4412.dts
> > > index 2b62cb27420c..57f9d09233ad 100644
> > > --- a/arch/arm/boot/dts/exynos4412-tiny4412.dts
> > > +++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts
> > > @@ -66,6 +66,16 @@
> > >                       clock-frequency = <24000000>;
> > >               };
> > >       };
> > > +
> > > +     panel {
> > > +             compatible = "innolux,at070tn92";
> > > +
> > > +             port {
> > > +                     panel_input: endpoint {
> > > +                             remote-endpoint = <&lcdc_output>;
> > > +                     };
> > > +             };
> > > +     };
> > >  };
> > >
> > >  &fimd {
> > > @@ -74,6 +84,12 @@
> > >       #address-cells = <1>;
> > >       #size-cells = <0>;
> > >       status = "okay";
> >
> > One empty space here.
> >
> > > +     port@3 {
> > > +             reg = <3>;
> >
> > Why starting from "3"? Why this is port@3, not just "port"?
> 
> From samsung-fimd.txt:
> ---
> The device node can contain 'port' child nodes according to the bindings defined
> in [2]. The following are properties specific to those nodes:
> - reg: (required) port index, can be:
>                 0 - for CAMIF0 input,
>                 1 - for CAMIF1 input,
>                 2 - for CAMIF2 input,
>                 3 - for parallel output,
>                 4 - for write-back interface
> ---
> 
> I guess it is influenced here.
> https://elixir.bootlin.com/linux/v5.5-rc5/source/drivers/gpu/drm/exynos/exynos_drm_dpi.c#L170
> Without it, lcd is completely black.

Thanks for explanation.

Best regards,
Krzysztof

Patch
diff mbox series

diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynos4412-tiny4412.dts
index 2b62cb27420c..57f9d09233ad 100644
--- a/arch/arm/boot/dts/exynos4412-tiny4412.dts
+++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts
@@ -66,6 +66,16 @@ 
 			clock-frequency = <24000000>;
 		};
 	};
+
+	panel {
+		compatible = "innolux,at070tn92";
+
+		port {
+			panel_input: endpoint {
+				remote-endpoint = <&lcdc_output>;
+			};
+		};
+	};
 };
 
 &fimd {
@@ -74,6 +84,12 @@ 
 	#address-cells = <1>;
 	#size-cells = <0>;
 	status = "okay";
+	port@3 {
+		reg = <3>;
+		lcdc_output: endpoint {
+			remote-endpoint = <&panel_input>;
+		};
+	};
 };
 
 &rtc {