2016-11-22 09:43:02

by Bartosz Golaszewski

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

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 <[email protected]>
---
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


2016-11-22 10:28:27

by Tomi Valkeinen

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

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 <[email protected]>
> ---
> 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@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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2016-11-22 10:30:22

by Bartosz Golaszewski

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

2016-11-22 11:27 GMT+01:00 Tomi Valkeinen <[email protected]>:
> 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 <[email protected]>
>> ---
>> 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@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