On Tue, Dec 01, 2015 at 09:53:50PM +0100, Mark Kettenis wrote: > I just committed the following cange to the OpenBSD inteldrm(4) > driver, which currently is mostly a port of the Linux 3.14 codebase. > This enables the GSE interrupt on Broadwell. Without this interrupt, > the ASLE backlight brightness mechanism doesn't work. I've verified > that this fixed the ACPI _BCM/_BCQ-based brightness mechanism on a > MacBookPro12,1 and a 3rd gen Lenovo X1 Carbon. And as far as I can > tell the current Linux code still doesn't enable the GSE interrupt. > So people over there might want to consider a diff like the one below. Yep, looks like you're correct, we still don't enable it. Let's cook up a patch... > > Cheers. > > Mark > > > Index: i915_irq.c > =================================================================== > RCS file: /cvs/src/sys/dev/pci/drm/i915/i915_irq.c,v > retrieving revision 1.29 > diff -u -p -r1.29 i915_irq.c > --- i915_irq.c 23 Sep 2015 23:12:12 -0000 1.29 > +++ i915_irq.c 1 Dec 2015 20:43:05 -0000 > @@ -3019,6 +3019,10 @@ static void gen8_de_irq_postinstall(stru > I915_WRITE(GEN8_DE_PORT_IMR, ~GEN8_AUX_CHANNEL_A); > I915_WRITE(GEN8_DE_PORT_IER, GEN8_AUX_CHANNEL_A); > POSTING_READ(GEN8_DE_PORT_IER); > + > + I915_WRITE(GEN8_DE_MISC_IMR, ~GEN8_DE_MISC_GSE); > + I915_WRITE(GEN8_DE_MISC_IER, GEN8_DE_MISC_GSE); > + POSTING_READ(GEN8_DE_MISC_IER); > } > > static int gen8_irq_postinstall(struct drm_device *dev) > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Ville Syrjälä Intel OTC _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
