[PATCH] rockchip: rk3328: Set VOP QoS to high priority

[Nicolas Frattaroli]

On Samstag, 23. Juli 2022 13:28:36 CEST Nicolas Frattaroli wrote:
> The default priority for the quality of service for the video
> output results in unsightly glitches on the output whenever there
> is memory pressure on the system, which happens a lot.
> 
> This sets the VOP QoS to high priority, which fixes this issue.
> 
> Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas at gmail.com>
> ---
>  arch/arm/mach-rockchip/rk3328/rk3328.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/mach-rockchip/rk3328/rk3328.c b/arch/arm/mach-rockchip/rk3328/rk3328.c
> index de17b88682..2373586b14 100644
> --- a/arch/arm/mach-rockchip/rk3328/rk3328.c
> +++ b/arch/arm/mach-rockchip/rk3328/rk3328.c
> @@ -19,6 +19,8 @@ DECLARE_GLOBAL_DATA_PTR;
>  #define GRF_BASE		0xFF100000
>  #define UART2_BASE		0xFF130000
>  #define FW_DDR_CON_REG		0xFF7C0040
> +#define QOS_VOP_OFFSET		0xFF760080
> +#define QOS_VOP_PRIORITY	0x8
>  
>  const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
>  	[BROM_BOOTSOURCE_EMMC] = "/mmc at ff520000",
> @@ -54,6 +56,9 @@ int arch_cpu_init(void)
>  
>  	/* Disable the ddr secure region setting to make it non-secure */
>  	rk_setreg(FW_DDR_CON_REG, 0x200);
> +#else
> +	printf("Setting VOP QoS\n");
> +	rk_setreg(QOS_VOP_OFFSET + QOS_VOP_PRIORITY, 0x2);
>  #endif
>  	return 0;
>  }
> 

Hello,

could I get a review on this?

Thank you for your time,
Nicolas Frattaroli