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@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@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; }