[Letux-kernel] [PATCH 00/20] A bunch of JZ4730 fixups for letux-kernel

[H. Nikolaus Schaller]

> Am 12.01.2021 um 19:03 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> 
> Then, scanning starts and I can reset ENA or set DIS to get it stopped. Or restarted. The QD and LDD
> bits follow. But no interrupts occur.

Well, interrupts are not disabled or broken. They just do not occur...

I managed to trigger some while playing around with the ENA and DIS flags.
But haven't found a pattern.

root at letux:~# devmem2 0x13050030 w 0x2400201c
/dev/mem opened.
Memory mapped at address 0x77edd000.
Value at address 0x13050030 (0x77edd030): 0x2400200C
Written 0x2400201C; readback 0x2400201C
** 8263 printk messages dropped **
[   10.900766] ingenic_drm_irq_handler 0x00000030
[   10.900039] ingenic_drm_irq_handler 0x00000030
[   10.899312] ingenic_drm_irq_handler 0x00000030
...