drm/i915: Fix VLV PLL LPF coefficients for DAC
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Fri, 14 Jun 2013 11:02:52 +0000 (14:02 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 1 Jul 2013 09:14:51 +0000 (11:14 +0200)
commit99750bd46f6ad3816fe2045a34fac432114c8196
treef9997cfed07a8a9826c57e8e2d65de457611c6cf
parent7425034a3361145c109510892d1e5154af2cdfed
drm/i915: Fix VLV PLL LPF coefficients for DAC

The current PLL settings produce a rather unstable picture when
I hook up a VLV to my HP ZR24w display via a VGA cable.

According to VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_9, we should
use the the same LPF coefficients for DAC as we do for HDMI and RBR DP.
And indeed that seems to cure the shivers.

v2: Add the name of the relevant document to the commit message

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_display.c