drm/i915: Make data/link N value power of two

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The BIOS uses power of two values for the data/link N value.

Follow suit to make the Zotac DP to dual-HDMI dongle work.

v2: Clean up the magic numbers and defines
    Change the N clamping to be a bit easier on the eye
    Rename intel_reduce_ratio to intel_reduce_m_n_ratio

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49402
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59810
Tested-by:  Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ville Syrjälä 2013-04-23 15:03:34 +03:00 • committed by Daniel Vetter

parent ae4edb8089

commit a65851af59

2 changed files with 22 additions and 16 deletions

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12

drivers/gpu/drm/i915/i915_reg.h

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26

drivers/gpu/drm/i915/intel_display.c

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