https://bugs.freedesktop.org/show_bug.cgi?id=39550
Roy <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO Assignee|[email protected] |[email protected] |rg | Attachment #85010|0 |1 is obsolete| | --- Comment #46 from Roy <[email protected]> --- Created attachment 85012 --> https://bugs.freedesktop.org/attachment.cgi?id=85012&action=edit drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v2) V2 fixes the reach of this patch. >From what I can tell the PWM_DIV is simply a divider for the initial PWM clock or something, it does not affect the scope of the duty cycle. I therefore assume 0x5e is always a good value to set. Traces from NV50:NVA0 would help verify whether NVIDIA always sets this value or not. This patch requires acpi_backlight=vendor to be set because it tests for the presence of a backlight by testing drm->backlight. An alternative to this test would be checking for the GPIO to be present and routed to SOR, but I wouldn't be surprised if there is at least one device that expects our driver to route it manually. How should we go about this? -- You are receiving this mail because: You are the assignee for the bug.
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