[Intel-gfx] [PATCH] drm/i915: fix hdmi portclock limits

[Daniel Vetter]

On Mon, Jul 22, 2013 at 05:24:34PM +0100, Damien Lespiau wrote:
> On Mon, Jul 22, 2013 at 06:02:39PM +0200, Daniel Vetter wrote:
> > In
> > 
> > commit 325b9d048810f7689ec644595061c0b700e64bce
> > Author: Daniel Vetter <daniel.vetter at ffwll.ch>
> > Date:   Fri Apr 19 11:24:33 2013 +0200
> > 
> >     drm/i915: fixup 12bpc hdmi dotclock handling
> > 
> > I've errornously claimed that we don't yet support the hdmi 1.4
> > dotclocks > 225 MHz on Haswell. But a bug report and a closer look at
> > the wrpll table showed that we've supported port clocks up to 300MHz.
> > 
> > With the new code to dynamically compute wrpll limits we should have
> > no issues going up to the full 340 MHz range of hdmi 1.4, so let's
> > just use that to fix this regression. That'll allow 4k over hdmi for
> > free!
> > 
> > v2: Drop the random hunk that somehow slipped in.
> > 
> > v3: Cantiga has the original HDMI dotclock limit of 165MHz. And also
> > patch up the mode filtering. To do so extract the dotclock limits into
> > a little helper function.
> > 
> > v4: Use 300MHz (from Bspec) instead of 340MHz (upper limit for hdmi
> > 1.3), apparently hw is not required to be able to drive the highest
> > dotclocks. Suggested by Damien.
> > 
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67048
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67030
> > Tested-by: Andreas Reis <andreas.reis at gmail.com> (v2)
> > Cc: Damien Lespiau <damien.lespiau at intel.com>
> > Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> 
> Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>

Picked up for -fixes, thanks for the review.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch