[Intel-gfx] [PATCH v2 0/4] drm/i915: Re-enable HDMI 12bpc

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Here's my second attempt at flipping HDMI 12bpc back on. In my last attempt [1]
Imre found that lots of standard CEA modes (1080p60 etc.) no longer work on
BXT due to the 12bpc port clock landing in a range that the DPLL can't generate.
CHV has the same limitation but it doesn't do 12bpc so the situation there
isn't as bad.

This series attempts to work around this problem by falling back to 8bpc when
the 1.5x port clock frequency turns out to be bad. Additionally we will from
now on filter out any mode where both 8bpc and 12bpc port clock is bad.

[1] http://lists.freedesktop.org/archives/intel-gfx/2015-June/068988.html

Ville Syrjälä (4):
  drm/i915: Fix HDMI 12bpc and pixel repeat clock readout for DDI
    platforms
  drm/i915: Bump HDMI min port clock to 25 MHz
  drm/i915: Account for CHV/BXT DPLL clock limittions
  Revert "drm/i915: Disable 12bpc hdmi for now"

 drivers/gpu/drm/i915/intel_ddi.c  | 49 +++++++++++++++++-----------------
 drivers/gpu/drm/i915/intel_hdmi.c | 55 +++++++++++++++++++++++++++------------
 2 files changed, 63 insertions(+), 41 deletions(-)

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