The LVDS display and touch are on same pins as sabreauto .
We are using Displaytech DT070BTFT-PTS1 link to datasheet .
Panel power sequence
V01=VADD, V02=VGL, V03=VGH, VCOM=VCOM. DVDD is obviously applied first.
We are able to power the display and it shows u-boot splash logo by running following commands in u-boot
• For display power sequencing
i2c dev 2 - First enable the I2c expanders and i2c port3
i2c mw 30 1 3b 1 - set the default value to i2c expander output
i2c mw 30 3 00 1 - set all the ports of i2c expander as output
i2c mw 30 1 b9 1 - enable AVDD and VGL
i2c mw 30 1 f9 1 - enable VGH
i2c mw 30 1 fd 1 - enable LED back light supply
mw 20e0250 00000015 1 - setting GPIO7_13 enable
gpio set gpio7_13 - enabling the display
mw 20e0254 00000015 1 - setting GPIO4_05 enable
gpio set gpio4_05 - wake up display from standby state
• For turn offing the Display, need to follow the below steps in order
i2c mw 30 1 f9 1 - disable back light
i2c mw 30 1 b9 1 - disable VGH
i2c mw 30 1 3b 1 - disable AVDD and VGL
But iam not able to make these changes in u-boot and kernel .
