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Lakka-LibreELEC/projects/Rockchip/patches/u-boot/0004-rockchip-rk3328-Set-VOP-QoS-to-high-priority.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Date: Sat, 23 Jul 2022 13:23:19 +0200
Subject: [PATCH 4/6] rockchip: rk3328: Set VOP QoS to high priority
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..58300bdf3f 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, 0xF);
#endif
return 0;
}