[PATCH] ARM: dts: da850: specify max width for display node

[PATCH] ARM: dts: da850: specify max width for display node

[Bartosz Golaszewski]

It has been determined that the highest resolution supported correctly
by LCDC rev1 is 800x600 on da850 due to memory bandwidth constraints.

Set the max_width property in da850.dtsi to 800.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 arch/arm/boot/dts/da850.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 36066fa..0876238 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -441,6 +441,7 @@
 			compatible = "ti,da850-tilcdc";
 			reg = <0x213000 0x1000>;
 			interrupts = <52>;
+			max-width = <800>;
 			status = "disabled";
 		};
 	};
-- 
2.9.3

[PATCH] ARM: dts: da850: specify max width for display node

[Tomi Valkeinen]

On 22/11/16 11:42, Bartosz Golaszewski wrote:
> It has been determined that the highest resolution supported correctly
> by LCDC rev1 is 800x600 on da850 due to memory bandwidth constraints.
> 
> Set the max_width property in da850.dtsi to 800.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
>  arch/arm/boot/dts/da850.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> index 36066fa..0876238 100644
> --- a/arch/arm/boot/dts/da850.dtsi
> +++ b/arch/arm/boot/dts/da850.dtsi
> @@ -441,6 +441,7 @@
>  			compatible = "ti,da850-tilcdc";
>  			reg = <0x213000 0x1000>;
>  			interrupts = <52>;
> +			max-width = <800>;
>  			status = "disabled";
>  		};
>  	};
> 

Does 1024x768 at 10 work?

The max-width should be the hardware's maximum supported width, not used
for bandwidth. tilcdc has max-bandwidth property for that.

 Tomi

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[PATCH] ARM: dts: da850: specify max width for display node

[Bartosz Golaszewski]

2016-11-22 11:27 GMT+01:00 Tomi Valkeinen <tomi.valkeinen@ti.com>:
> On 22/11/16 11:42, Bartosz Golaszewski wrote:
>> It has been determined that the highest resolution supported correctly
>> by LCDC rev1 is 800x600 on da850 due to memory bandwidth constraints.
>>
>> Set the max_width property in da850.dtsi to 800.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>> ---
>>  arch/arm/boot/dts/da850.dtsi | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>> index 36066fa..0876238 100644
>> --- a/arch/arm/boot/dts/da850.dtsi
>> +++ b/arch/arm/boot/dts/da850.dtsi
>> @@ -441,6 +441,7 @@
>>                       compatible = "ti,da850-tilcdc";
>>                       reg = <0x213000 0x1000>;
>>                       interrupts = <52>;
>> +                     max-width = <800>;
>>                       status = "disabled";
>>               };
>>       };
>>
>
> Does 1024x768 at 10 work?
>
> The max-width should be the hardware's maximum supported width, not used
> for bandwidth. tilcdc has max-bandwidth property for that.
>
>  Tomi
>

Eeek I misread Jyri's answer.

Will fix that in v2.

Thanks,
Bartosz