LCD
Allwinner 平台显示输出接口信息如下
| 主板 | SOC | 显示输出接口 |
|---|---|---|
| K2B | H618 | HDMI |
| K2C | H618 | HDMI |
| K4B | T113 | MIPI DSI、Single LVDS |
| K5C | A133 | MIPI DSI、Single LVDS、Dual LVDS |
| K9 | T527 | MIPI DSI、Single LVDS、Dual LVDS、HDMI |
相关术语
| 术语 | 说明 |
|---|---|
| HDMI | 高清多媒体接口（High-Definition Multimedia Interface）。 |
| MIPI DSI | 移动行业处理器接口显示串行接口（Mobile Industry Processor Interface Display Serial Interface）。 |
| Single LVDS | 单通道低压差分信号接口（Single - Channel Low - Voltage Differential Signaling）。 |
| Dual LVDS | 单通道低压差分信号接口（Dual - Channel Low - Voltage Differential Signaling）。 |
屏幕外设
Note
路径注释会标注显示接口以及屏幕型号配置，如 MIPI DSI - AT101DS40I ，指 MIPI DSI 接口配置 AT101DS40I 型号屏幕。
MIPI DSI 接口屏幕外设信息如下：
| 型号 | 尺寸 | 分辨率 | 触摸 |
|---|---|---|---|
| AT101DS40I | 10.1-inch | 800x1280 | Y |
| MX101BA1340 | 10.1-inch | 800x1280 | Y |
| MX080B2140 | 8.0-inch | 800x1280 | Y |
| F050008M01 | 5.0-inch | 720x1280 | Y |
LVDS 接口屏幕外设信息如下：
| 接口类型 | 型号 | 尺寸 | 分辨率 | 触摸 |
|---|---|---|---|---|
| LVDS Single link | MX070IBC | 7.0-inch | 1024x600 | Y |
| LVDS Dual link | / | 21~27 inch | 1920x1080 | N |
DTS 配置
T113
T113 平台 K4B 屏幕 DTS 配置路径如下：
// MIPI DSI - AT101DS40I
brandy/brandy-2.0/u-boot-2018/arch/arm/dts/t113-s3-kickpi-lcd-mipi-10-800-1280-v1.dtsi
kernel/linux-5.4/arch/arm/boot/dts/t113-s3-kickpi-lcd-mipi-10-800-1280-v1.dtsi
// MIPI DSI - MX101BA1340
brandy/brandy-2.0/u-boot-2018/arch/arm/dts/t113-s3-kickpi-lcd-mipi-10-800-1280-v2.dtsi
kernel/linux-5.4/arch/arm/boot/dts/t113-s3-kickpi-lcd-mipi-10-800-1280-v2.dtsi
// MIPI DSI - F050008M01
brandy/brandy-2.0/u-boot-2018/arch/arm/dts/t113-s3-kickpi-lcd-mipi-5-720-1280.dtsi
kernel/linux-5.4/arch/arm/boot/dts/t113-s3-kickpi-lcd-mipi-5-720-1280.dtsi
// MIPI DSI - MX080B2140
brandy/brandy-2.0/u-boot-2018/arch/arm/dts/t113-s3-kickpi-lcd-mipi-8-800-1280.dtsi
kernel/linux-5.4/arch/arm/boot/dts/t113-s3-kickpi-lcd-mipi-8-800-1280.dtsi
A133
A133 平台 K5C 屏幕 DTS 配置路径如下：
// MIPI DSI - MX101BA1340
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/lcd-mipi-10-800-1280-v2.dtsi
// MIPI DSI - AT101DS40I
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/lcd-mipi-10-800-1280-v1.dtsi
// MIPI DSI - MX080B2140
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/lcd-mipi-8-800-1280.dtsi
// MIPI DSI - F050008M01
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/lcd-mipi-5-720-1280.dtsi
// Signal LVDS
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/lcd-lvds-7-1024-600.dtsi
// Dual LVDS
longan/kernel/linux-4.9/arch/arm64/boot/dts/sunxi/lcd-lvds-21-1920-1080.dtsi
T527
Note
对于T527平台而言，U-Boot（引导程序）与Kernel（内核）需分别独立使用一份专属的DTS（设备树源）文件，二者互不共用、各自独立配置。
T527平台 K9 屏幕 DTS 配置路径如下：
Android
kernel：
// MIPI DSI0 - F050008M01
longan/device/config/chips/t527/configs/demo/lcd-mipi0-5-720-1280-kernel.dtsi
// Signal LVDS0
longan/device/config/chips/t527/configs/demo/lcd-lvds0-7-1024-600-kernel.dtsi
uboot:
// MIPI DSI0 - F050008M01
longan/brandy/brandy-2.0/u-boot-2018/arch/arm/dts/lcd-mipi0-5-720-1280-uboot.dtsi
// Signal LVDS0
longan/brandy/brandy-2.0/u-boot-2018/arch/arm/dts/lcd-lvds0-7-1024-600-uboot.dtsi
Debian 11
kernel：
// MIPI DSI0 - F050008M01
bsp/configs/linux-5.15/lcd-mipi0-5-720-1280-kernel.dtsi
// Signal LVDS0
bsp/configs/linux-5.15/lcd-lvds0-7-1024-600-kernel.dtsi
uboot:
// MIPI DSI0 - F050008M01
brandy/brandy-2.0/u-boot-2018/arch/arm/dts/lcd-mipi0-5-720-1280-uboot.dtsi
// Signal LVDS0
brandy/brandy-2.0/u-boot-2018/arch/arm/dts/lcd-lvds0-7-1024-600-uboot.dtsi
驱动文件
T113
T113 平台 K4B 屏幕配置驱动路径如下：
// MIPI DSI - MX101BA1340
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280.h
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280.c
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_8_800x1280.h
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280.c
// MIPI DSI - F050008M01
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.h
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.c
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_5_720x1280.h
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_5_720x1280.c
// MIPI DSI - AT101DS40I
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.h
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.c
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.h
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.c
// MIPI DSI - MX080B2140
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_8_800x1280.h
brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_8_800x1280.c
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280.h
kernel/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_8_800x1280.c
A133
A133 平台 K5C 屏幕配置驱动路径如下：
// MIPI DSI - AT101DS40I
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.h
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.c
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.h
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280_AT101DS40I.c
// MIPI DSI - F050008M01
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.h
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.c
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_5_720x1280.h
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_5_720x1280.c
// MIPI DSI - MX080B2140
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_8_800x1280.h
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_8_800x1280.c
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_8_800x1280.h
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_8_800x1280.c
// MIPI DSI - MX101BA1340
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280.h
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_10_800x1280.c
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280.h
longan/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/mipi_10_800x1280.c
T527
T527平台 K9 屏幕配置驱动路径如下：
Android
// MIPI DSI - F050008M01
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.c
longan/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.h
longan/bsp/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.c
longan/bsp/drivers/video/sunxi/disp2/disp/lcd/mipi_5_720x1280.h
调试信息
查看当前显示输出的属性：
操作示例：
# cat /sys/class/disp/disp/attr/sys
screen 0:
de_rate 300000000 hz, ref_fps:66
mgr0: 720x1280 fmt[rgb] cs[0x204] range[full] eotf[0x4] bits[8bits] err[1] force_sync[0] unblank direct_show[false] iommu[1]
dmabuf: cache[7] cache max[37] umap skip[0] overflow[4]
lcd output backlight(102) fps:66.5 720x1280
err:2 skip:99 irq:17699 vsync:12094 vsync_skip:0
BUF enable ch[3] lyr[0] z[0] prem[Y] a[globl 255] fmt[ 1] fb[ 736,1280; 368, 640; 368, 640] crop[ 0, 0, 720,1280] frame[ 0, 0, 720,1280] addr[fec00000,fecf0000,fed29800] flags[0x 0] trd[0,0]
depth[ 0] disp[0]all:685, sub:685, cur:685, free:682, skip:0