When we running DDR benchmark test will able to observed flicker issue
in 4k@60 resolution on monitor. In LS1028A SoC, need increasing DP500
priority to avoid that issue.
Signed-off-by: Wen He <wen.h...@nxp.com>
---
drivers/gpu/drm/arm/malidp_hw.c | 13 +++++++++++++
drivers/gpu/drm/arm/malidp_regs.h | 8 ++++++++
2 files changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 8df12e9a33bb..a5263488eb02 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -378,6 +378,19 @@ static void malidp500_modeset(struct malidp_hw_device
*hwdev, struct videomode *
malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_ILACED,
MALIDP_DE_DISPLAY_FUNC);
else
malidp_hw_clearbits(hwdev, MALIDP_DISP_FUNC_ILACED,
MALIDP_DE_DISPLAY_FUNC);
+
+#ifdef CONFIG_ARCH_LAYERSCAPE
+ /* Setting QoS for 4k resolution to avoid flicker issue */
+ if (mode->hactive == 3840
+ && mode->vactive == 2160)
+ malidp_hw_setbits(hwdev, GREEN_ARQOS_CONFIG
+ | RED_ARQOS_CONFIG, MALIDP500_RQOS_QUALITY);
+ else
+ malidp_hw_clearbits(hwdev, GREEN_ARQOS_CONFIG
+ | RED_ARQOS_CONFIG, MALIDP500_RQOS_QUALITY);
+
+ malidp_hw_setbits(hwdev, CONFIG_VALID, MALIDP500_CONFIG_VALID);
+#endif
}
int malidp_format_get_bpp(u32 fmt)
diff --git a/drivers/gpu/drm/arm/malidp_regs.h
b/drivers/gpu/drm/arm/malidp_regs.h
index a0dd6e1676a8..8dcf7e9f46ce 100644
--- a/drivers/gpu/drm/arm/malidp_regs.h
+++ b/drivers/gpu/drm/arm/malidp_regs.h
@@ -213,6 +213,14 @@
#define MALIDP500_DC_IRQ_BASE 0x00f00
#define MALIDP500_CONFIG_VALID 0x00f00
#define MALIDP500_CONFIG_ID 0x00fd4
+#ifdef CONFIG_ARCH_LAYERSCAPE
+#define MALIDP500_RQOS_QUALITY 0x00500
+/* Increasing QoS level signal */
+#define GREEN_ARQOS_CONFIG (0xd << 28)
+/* Close to underflow QoS level signal */
+#define RED_ARQOS_CONFIG (0xd << 12)
+#define CONFIG_VALID 0x3
+#endif
/* register offsets and bits specific to DP550/DP650 */
#define MALIDP550_ADDR_SPACE_SIZE 0x10000
--
2.17.1
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