Hi,
I am trying to bring up the
https://www.buydisplay.com/default/lcd-3-5-inch-320x480-tft-display-module-optl-touch-screen-w-breakout-board
with DRM_TILCDC on the RGB 16 pins on P8. First I tried to go SPI.
Here is my saga.
I flashed the latest http://debian.beagleboard.org/images/bone-debian-9.5-lxqt-armhf-2018-10-07-4gb.img.xz to BBB
I killed the default u-boot from eMMC, the right uBoot is taken from sdcard
The display wiring is:
`
LCD________________BBB___________________GPIO_______________________________
JP2 1 P9_27 (VSYNC)
JP2 2 P9_29 (HSYNC)
JP2 3 P9_28 (PCLK)
JP2 4 P9_30 (DE)
JP1 [3-20] P8 31-46 (keep first 8 LCD off due: BBB is not booting)
JP1 1 P9_1 GND
JP1 2 P9_3 +VCC
JP1 21 RESET P9_12 RST GPIO 60
JP1 23 CS P9_17 CS SPI0_CS0
JP1 24 SCLK P9_22 CLK SPI0_SCLK
JP1 25 DC P9_15 D/C GPIO 48
JP1 27 MOSI P9_18 MOSI SPI 0 D1
JP1 28 MISO P9_21 MISO SPI 0 D0
JP1 29 BL/LED P9_27 LED/BL 29 GPIO 115
`
I have the uEnv.txt as:
`
#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0
uname_r=4.14.108-ti-r108
#uuid=
#dtb=
###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1