LCD
The display output interface information for Allwinner platforms is as follows:
| Board | SoC | Display Output Interfaces |
|---|---|---|
| K2B | H618 | HDMI |
| K2C | H618 | HDMI |
| K4B | T113 | MIPI DSI, Single LVDS |
| K5C | A133 | MIPI DSI, Single LVDS, Dual LVDS |
Related Terminology
| Term | Description |
|---|---|
| HDMI | High-Definition Multimedia Interface. |
| MIPI DSI | Mobile Industry Processor Interface Display Serial Interface. |
| Single LVDS | Single-Channel Low-Voltage Differential Signaling. |
| Dual LVDS | Dual-Channel Low-Voltage Differential Signaling. |
Screen Peripherals
Note
Path annotations will indicate the display interface and screen model configuration, e.g., MIPI DSI - AT101DS40I refers to the MIPI DSI interface configured for the AT101DS40I model screen.
MIPI DSI interface screen peripheral information is as follows:
| Model | Size | Resolution | Touch |
|---|---|---|---|
| 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 interface screen peripheral information is as follows:
| Interface Type | Model | Size | Resolution | Touch |
|---|---|---|---|---|
| LVDS Single link | MX070IBC | 7.0-inch | 1024x600 | Y |
| LVDS Dual link | / | 21~27 inch | 1920x1080 | N |
DTS Configuration
T113
The DTS configuration paths for screens on the T113 platform (K4B) are as follows:
// 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
The DTS configuration paths for screens on the A133 platform (K5C) are as follows:
// 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
Driver Files
T113
The driver paths for screen configuration on the T113 platform (K4B) are as follows:
// 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
The driver paths for screen configuration on the A133 platform (K5C) are as follows:
// 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
Debugging Information
View the properties of the current display output:
Operation example:
# 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