robertoj

Those LCD parameters where you found differences are: PGAMCTRL (Positive Gamma Control) (E0h) NGAMCTRL (Negative Gamma Control) (E1h) (See the ILI9488 PDF I posted) I don't know what they do exactly, but I guess they control pixel voltage, given a R, G or B digital value. I think that you can worry about it, after everything else works.

Thanks! Try playing a 1080p H264 video. With hardware acceleration, the CPU should be at 25% or less (check cpu % in htop)

Hi Ricardo, Maybe you can make a github page with instructions how to add wayland to a minimal armbian image... and let us choose from sway, i3, gnome and labwc

I just looked at your neofetch screenshot again... linux 6.6.72. Armbian community 25.5.0-trunk.87... I am surprised that H264 hardware acceleration is working But I noticed you are running Wayland and Gnome... is that how it works from the desktop-armbian image? Or did you install it later? (I hope I can start with a minimal image, and install all that's needed for wayland+labwc in my SPI LCD <- aiming for minimal ram use and lowest load time)

Yes, you must use that panel-mipi-dbi-spi.txt, process it with the python script, copy it to the right folder, and use the DTS I shared last. I havent seen another command byte sequence for ili9488. Can you post the link to the download (to make sure I will see the same thing). Can you make a hypothetical byte sequence from the LCDWIKI_SPI.cpp?

Try it with the ili9486 and ili9488 DTS we have made here: https://forum.armbian.com/topic/46824-orange-pi-zero-3-ili9486-tft-lcd/ https://forum.armbian.com/topic/47971-driving-the-ili9488-lcd-40-inch-cheap-chinese-clone/ For the gpio inside the DTS, it is only enough to know the port letter and pin number (you don't need the GPIO number and WPI)

I had time to test xrandr with my ili9488 and mipi-dbi-spi while the LCD is showing X11+lightdm+openbox, I logged in via SSH and typed: roberto@orangepizero3:~$ DISPLAY=:0.0 xrandr -q xrandr: Failed to get size of gamma for output default Screen 0: minimum 480 x 320, current 480 x 320, maximum 480 x 320 default connected 480x320+0+0 0mm x 0mm 480x320 0.00* roberto@orangepizero3:~$ DISPLAY=:0.0 xrandr --output default --rotate left xrandr: output default cannot use rotation "left" reflection "none" So, I can't rotate the LCD display with xrandr, and the only option is the 2 actions I shared on March 4 Note: the 4 rotate options are normal, right, left and inverted. None of them worked

I have the ili9488 working in orange pi zero 3 with my DTS in https://forum.armbian.com/topic/47971-driving-the-ili9488-lcd-40-inch-cheap-chinese-clone/#findComment-208446 and the panel-mipi-dbi-spi.txt from https://github.com/KungfuPancake/v0_ips_touch_display?tab=readme-ov-file My DTS file uses the new panel-mipi-dbi-spi driver, which is not fbtft, it is tinydrm. Kernel 6.12, built from https://github.com/NickAlilovic/build I can use X11 completely fine, but I havent tried wayland and h264 acceleration yet. Can you try it? The only problems I see: Cursor has some "jumpiness" when pressing the touch panel (ads7846). Graphic pixel noise appears when I am dragging an X11 window with finger. But it returns to normal after the dragging event. (doesn't happen when I drag with USB mouse). I think the noise won't happen if I can make a separate soft-SPI for the touch function. Has anybody tried xrandr? I learned to use it in my laptop, but I don't have my orange pi zero 3 available. Can anyone try: $ xrandr --output SPI-1 --rotate left Then replace left with: inverted, right and normal This should take care of the touch at the same time, but someone needs to try it.

I found that you can rotate the ili9488 display 180 degrees, by changing the LCD initialization command in panel-mipi-dbi-spi.txt: Change: command 0x36 0xE0 To: command 0x36 0x20 (changes memory access control row and column order from: starting from the corner near the VCC pin, to starting from the corner opposite from the VCC pin) Then, open /usr/share/X11/xorg.conf.d/99-calibration, and add: Option "InvertX" "1" Option "InvertY" "1" Reference: https://focuslcds.com/wp-content/uploads/Drivers/ILI9488.pdf https://forums.raspberrypi.com/viewtopic.php?t=173993 I hope it helps someone, or to myself in the future

Can you try other armbian images (i always use minimal), and self-built armbian image? Can you change USB cable? Powering with the 0V-5V pins in the GPIO pins?

My 60 MHz SPI connection is 1 m long, the cable was made with a CAT5 ethernet cable. The problem was reduced by making a 50 cm cable. Maybe I need termination resistors too. I could start with 1000ohms between MOSI and GND in the LCD wire ends. If it doesn't work, reduce the resistance, until I don't see noise.

Is the A10's TV encoder much different from the H3 TV encoder? The orange pi zero LTS has a working TV-out in Armbian (at least when I tried it last year)

For touch calibration, the straighforward intuitive way does not work. Try this procedure: https://forum.armbian.com/topic/44191-orangepi-zero-lts-ili9341-tft-lcd-and-later-orangepi-zero-3/#findComment-204741 The copy location /etc/X11/xorg.conf.d/ might be different. The xinput calibration text output will tell you that directory. The DTS also has some pressure and resistivity parameters, but I don't know how they work exactly.

Do you use x11's evdev component? Does it make any difference of stability before and after running xcalibrate/xinput_calibrator? I find that xinput_calibrator does not do anything toward pressure sensitivity. I need to make it less sensitive... anyone knows a good way of doing this?

Nicely done!! How are you going to use it? X11? Wayland? What window manger and desktop? Is your mouse cursor jumpy or stable? Is there RGB noise when you drag windows on the desktop? I have those issues. My setup: orange pi zero3, ili9488, drm, x11, openbox and idesk. I wonder if my problem comes from sharing the SPI bus with 2 chip selects... but if you have one SPI and 2 chip selects, but no noise problems, then SPI is not my problem.