Is anyone using panel-mipi-dbi in Linux 6.12?

[robertojguerra]

I need a new feature that's only available in 6.12, from an unofficial armbian branch... but I keep getting errors about failing to inject the firmware.

The same setup: same DTS, same bin, same ili9488, was successful in linux 6.11

Is anyone successful with Linux 6.12?

Is there a way to make panel-mipi-dbi-spi more verbose to see what's going on?

[notro]

Enable driver debug messages:

# echo 0x02 > /sys/module/drm/parameters/debug

$ modinfo -p drm
debug:Enable debug output, where each bit enables a debug category.
		Bit 0 (0x01)  will enable CORE messages (drm core code)
		Bit 1 (0x02)  will enable DRIVER messages (drm controller code)
		Bit 2 (0x04)  will enable KMS messages (modesetting code)
		Bit 3 (0x08)  will enable PRIME messages (prime code)
		Bit 4 (0x10)  will enable ATOMIC messages (atomic code)
		Bit 5 (0x20)  will enable VBL messages (vblank code)
		Bit 7 (0x80)  will enable LEASE messages (leasing code)
		Bit 8 (0x100) will enable DP messages (displayport code) (ulong)

[robertojguerra]

Thank you... this makes the modules more verbose, which will be helpful.

When I boot Linux 6.12, the LCD does not come on, and I enter "# modprobe panel-mipi-dbi"

Then "dmesg | grep panel" shows that my firmware file ili9488-fw.bin gets used... but there's not even 1 blink in the LCD.

So far can't see why the LCD is not responding... perhaps I need to check that the SPI is working correctly in this Orange Pi zero 3 with Linux 6.12

Are there more required modules? panel-mipi-dbi and drm_mipi_dbi?

How would I make it work since boot time? (I need this to use it in the orange pi zero 3 with 6.11.9 where the ili9488 is working)

[notro]

Module panel-mipi-dbi depends on drm_mipi_dbi and drm. These are automatically loaded if they're not built into the kernel image. If you need the driver to load as early as possible, you need to have it built into the kernel image. This means a y instead of an m in the kernel config.

[robertojguerra]

Thank you... I assumed the other ko's got selected... but now I will check.

I know that raspberry pi users are enjoying panel-Milo-dbi-spi with Linux 6.12, so that gives me some hope.

[robertojguerra]

Notro, thank you for your help 2 weeks ago.

My problem was the SPI driver not being configured correctly when I upgraded to Linux 6.12.

panel-mipi-dbi-spi works in Orange Pi Zero 3 in Linux 6.12 and Linux 6.13
https://forum.armbian.com/topic/47971-driving-the-ili9488-lcd-40-inch-cheap-chinese-clone/#findComment-216779