radeon_hd crashes in pll_compute()

[korli]

this is on 1002:164c (Lucienne)

2022-01-03 23:23:56 KERN: debug_server: Thread 727 entered the debugger: Divide error
2022-01-03 23:23:56 KERN: stack trace, current PC 0x192145e96a9  _Z11pll_computeP8pll_info + 0x89:
2022-01-03 23:23:56 KERN:   (0x7f79beeba9d0)  0x192145e9f95  _Z7pll_setP12display_modeh + 0xf5
2022-01-03 23:23:56 KERN:   (0x7f79beebaa50)  0x192145e8900  radeon_set_display_mode + 0x150
2022-01-03 23:23:56 KERN:   (0x7f79beebaaa0)  0x26dc1b04e9f  _ZN21AccelerantHWInterface7SetModeERK12display_mode + 0x39f
2022-01-03 23:23:56 KERN:   (0x7f79beebab20)  0x26dc1abff56  _ZN6Screen7SetModeERK12display_mode + 0x66
2022-01-03 23:23:56 KERN:   (0x7f79beebab80)  0x26dc1ac055f  _ZN6Screen11SetBestModeEttjfb + 0x28f
2022-01-03 23:23:56 KERN:   (0x7f79beebac40)  0x26dc1ae4a68  _ZN13VirtualScreen9AddScreenEP6ScreenR20ScreenConfigurations + 0x148
2022-01-03 23:23:56 KERN:   (0x7f79beebacc0)  0x26dc1ae4d91  _ZN13VirtualScreen16SetConfigurationER7DesktopR20ScreenConfigurationsPj + 0x191
2022-01-03 23:23:56 KERN:   (0x7f79beebadb0)  0x26dc1ab229c  _ZN7Desktop4InitEv + 0x13c
2022-01-03 23:23:56 KERN:   (0x7f79beebae60)  0x26dc1aa624f  _ZN9AppServer14_CreateDesktopEjPKc + 0x4f
2022-01-03 23:23:56 KERN:   (0x7f79beebaeb0)  0x26dc1aa650d  _ZN9AppServer15MessageReceivedEP8BMessage + 0x14d
2022-01-03 23:23:56 KERN:   (0x7f79beebaf60)  0x1ab5d5d1b64  _ZN7BLooper11task_looperEv + 0x284
2022-01-03 23:23:56 KERN:   (0x7f79beebafb0)  0x1ab5d5c6ab1  _ZN12BApplication3RunEv + 0x21
2022-01-03 23:23:56 KERN:   (0x7f79beebafd0)  0x26dc1aa4fa2  main + 0x52
2022-01-03 23:23:56 KERN:   (0x7f79beebb000)  0x26dc1aa5a1f  _start + 0x3f
2022-01-03 23:23:56 KERN:   (0x7f79beebb030)  0x1b67d7fef55  runtime_loader + 0x105