diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/805-display-0001-drm-arm-mali-dp-Add-display-QoS-interface-configurat.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/805-display-0001-drm-arm-mali-dp-Add-display-QoS-interface-configurat.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/805-display-0001-drm-arm-mali-dp-Add-display-QoS-interface-configurat.patch b/target/linux/layerscape/patches-5.4/805-display-0001-drm-arm-mali-dp-Add-display-QoS-interface-configurat.patch new file mode 100644 index 0000000000..c27e34fc0b --- /dev/null +++ b/target/linux/layerscape/patches-5.4/805-display-0001-drm-arm-mali-dp-Add-display-QoS-interface-configurat.patch @@ -0,0 +1,85 @@ +From dae2475df84cd77c6f7245984869897c0eb0f84e Mon Sep 17 00:00:00 2001 +From: Wen He <wen.he_1@nxp.com> +Date: Tue, 10 Sep 2019 15:01:00 +0800 +Subject: [PATCH] drm/arm/mali-dp: Add display QoS interface configuration for + Mali DP500 + +Configure the display Quality of service (QoS) levels priority if the +optional property node "arm,malidp-aqros-value" is defined in DTS file. + +QoS signaling using AQROS and AWQOS AXI interface signals, the AQROS is +driven from the "RQOS" register, so needed to program the RQOS register +to avoid the high resolutions flicker issue on the LS1028A platform. + +Signed-off-by: Wen He <wen.he_1@nxp.com> +--- + drivers/gpu/drm/arm/malidp_drv.c | 6 ++++++ + drivers/gpu/drm/arm/malidp_hw.c | 9 +++++++++ + drivers/gpu/drm/arm/malidp_hw.h | 3 +++ + drivers/gpu/drm/arm/malidp_regs.h | 10 ++++++++++ + 4 files changed, 28 insertions(+) + +--- a/drivers/gpu/drm/arm/malidp_drv.c ++++ b/drivers/gpu/drm/arm/malidp_drv.c +@@ -817,6 +817,12 @@ static int malidp_bind(struct device *de + + malidp->core_id = version; + ++ ret = of_property_read_u32(dev->of_node, ++ "arm,malidp-arqos-value", ++ &hwdev->arqos_value); ++ if (ret) ++ hwdev->arqos_value = 0x0; ++ + /* set the number of lines used for output of RGB data */ + ret = of_property_read_u8_array(dev->of_node, + "arm,malidp-output-port-lines", +--- a/drivers/gpu/drm/arm/malidp_hw.c ++++ b/drivers/gpu/drm/arm/malidp_hw.c +@@ -379,6 +379,15 @@ static void malidp500_modeset(struct mal + 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); ++ ++ /* ++ * Program the RQoS register to avoid high resolutions flicker ++ * issue on the LS1028A. ++ */ ++ if (hwdev->arqos_value) { ++ val = hwdev->arqos_value; ++ malidp_hw_setbits(hwdev, val, MALIDP500_RQOS_QUALITY); ++ } + } + + int malidp_format_get_bpp(u32 fmt) +--- a/drivers/gpu/drm/arm/malidp_hw.h ++++ b/drivers/gpu/drm/arm/malidp_hw.h +@@ -251,6 +251,9 @@ struct malidp_hw_device { + + /* size of memory used for rotating layers, up to two banks available */ + u32 rotation_memory[2]; ++ ++ /* priority level of RQOS register used for driven the ARQOS signal */ ++ u32 arqos_value; + }; + + static inline u32 malidp_hw_read(struct malidp_hw_device *hwdev, u32 reg) +--- a/drivers/gpu/drm/arm/malidp_regs.h ++++ b/drivers/gpu/drm/arm/malidp_regs.h +@@ -210,6 +210,16 @@ + #define MALIDP500_CONFIG_VALID 0x00f00 + #define MALIDP500_CONFIG_ID 0x00fd4 + ++/* ++ * The quality of service (QoS) register on the DP500. RQOS register values ++ * are driven by the ARQOS signal, using AXI transacations, dependent on the ++ * FIFO input level. ++ * The RQOS register can also set QoS levels for: ++ * - RED_ARQOS @ A 4-bit signal value for close to underflow conditions ++ * - GREEN_ARQOS @ A 4-bit signal value for normal conditions ++ */ ++#define MALIDP500_RQOS_QUALITY 0x00500 ++ + /* register offsets and bits specific to DP550/DP650 */ + #define MALIDP550_ADDR_SPACE_SIZE 0x10000 + #define MALIDP550_DE_CONTROL 0x00010 |