Date: Wed, 11 Feb 2015 12:42:20 -0500 From: Ian FREISLICH <ianf@capeaugusta.com> To: Adrian Chadd <adrian@freebsd.org> Cc: Ian FREISLICH <ianf@capeaugusta.com>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: r277959 breaks X display on IvyBridge mobile GT2 IG Message-ID: <E1YLbIq-0000JH-3i@clue.co.za> In-Reply-To: <CAJ-Vmo=aiXAdm%2B%2B9B=VW9muoqFjKSizLayvNMN0ZpV4eyxEK0w@mail.gmail.com> References: <CAJ-Vmo=aiXAdm%2B%2B9B=VW9muoqFjKSizLayvNMN0ZpV4eyxEK0w@mail.gmail.com> <E1YLZQ5-000GX8-Pk@clue.co.za>
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Adrian Chadd wrote:
> Hi,
> =
> There's a "invert backlight" option in i915, try setting it to 1?
This is pretty much all I could find (unless I was looking in the
wrong place). It makes no difference. The backlight appears to
be disabled.
Index: intel_display.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- intel_display.c (revision 278584)
+++ intel_display.c (working copy)
@@ -6938,6 +6938,9 @@
=
/* Acer Aspire 5734Z must invert backlight brightness */
{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
+
+ /* Asus Zenbook UX31A must invert backlight brightness */
+ { 0x0166, 0x1043, 0x1517, quirk_invert_brightness },
};
=
static void intel_init_quirks(struct drm_device *dev)
Resulting log message:
Feb 11 11:55:38 zen kernel: info: [drm] applying inverted panel brightness=
quirk
The flag removed by r278584 is BLM_PCH_OVERRIDE_ENABLE according
to the Linux driver. I think we're not correctly setting or selecting
the PWM channel for backlight control.
> =
> -a
> =
> =
> On 11 February 2015 at 07:41, Ian FREISLICH <ianf@capeaugusta.com> wrote=
:
> > Hi
> >
> > With this commit my display blanks and never lights up when X starts.
> >
> > [zen] /usr/src # svn diff -r 277958:277959
> > Index: sys/dev/drm2/i915/intel_display.c
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > --- sys/dev/drm2/i915/intel_display.c (revision 277958)
> > +++ sys/dev/drm2/i915/intel_display.c (revision 277959)
> > @@ -6995,7 +6995,7 @@
> > */
> > I915_WRITE(BLC_PWM_CPU_CTL2, PWM_ENABLE);
> > I915_WRITE(BLC_PWM_CPU_CTL, 0);
> > - I915_WRITE(BLC_PWM_PCH_CTL1, PWM_ENABLE | (1<<30));
> > + I915_WRITE(BLC_PWM_PCH_CTL1, PWM_ENABLE);
> > }
> >
> > void intel_modeset_init_hw(struct drm_device *dev)
> >
> >
> > vgapci0@pci0:0:2:0: class=3D0x030000 card=3D0x15171043 chip=3D0x01=
668086 rev=3D
0x09
> > hdr=3D0x00
> > vendor =3D 'Intel Corporation'
> > device =3D '3rd Gen Core processor Graphics Controller'
> > class =3D display
> > subclass =3D VGA
> > cap 05[90] =3D MSI supports 1 message enabled with 1 message
> > cap 01[d0] =3D powerspec 2 supports D0 D3 current D0
> > cap 13[a4] =3D PCI Advanced Features: FLR TP
> >
> > Ian
> >
> > --
> > Ian Freislich
> > _______________________________________________
> > freebsd-current@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-current
> > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.=
org"
-- =
Meditating Guru
Ian Freislich
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