[PATCH] arm64: dts: fast models: Increase clcd's max-memory-bandwidth

Robin Murphy robin.murphy at arm.com
Thu Jul 25 15:15:16 UTC 2019


Hi Kevin,

On 25/07/2019 15:50, Kevin Brodsky wrote:
> It may be desirable on certain platforms, such as Android, to
> use 32bpp buffers. Since there is no clear bandwidth limit for the
> CLCD component on the fast model, let's increase
> max-memory-bandwidth to allow using 32bpp buffers.

Given that the property is optional anyway, would it hurt to just remove 
it? After trying to dig up any relevant internal email history, it's 
still far from clear how and why it got here in the first place.

Robin.

> Reported-by: Ruben Ayrapetyan <ruben.ayrapetyan at arm.com>
> Signed-off-by: Kevin Brodsky <kevin.brodsky at arm.com>
> ---
>   arch/arm64/boot/dts/arm/fvp-base-revc.dts | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/arm/fvp-base-revc.dts b/arch/arm64/boot/dts/arm/fvp-base-revc.dts
> index 687707020ec1..3aee49ed6d88 100644
> --- a/arch/arm64/boot/dts/arm/fvp-base-revc.dts
> +++ b/arch/arm64/boot/dts/arm/fvp-base-revc.dts
> @@ -269,7 +269,7 @@
>   		motherboard {
>   			iofpga at 3,00000000 {
>   				clcd at 1f0000 {
> -					max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */
> +					max-memory-bandwidth = <260000000>; /* 32bpp @ 63.5MHz */
>   				};
>   			};
>   		};
> 


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