[Intel-gfx] [PATCH 0/2] New cdclk values for gen11+

[Matt Roper]

The bspec was recently updated with new cdclk values 324mhz and
326.4mhz.  These clock values are the first ones on gen11+ that use a
CD2X clock divider of /2 rather than /1 so we need a little bit of extra
logic to program the divider properly before actually enabling them.

Note that the bspec does have a note next to the /1 divider bits saying
"Use this setting for all CD frequencies" on gen11.  I suspect that this
note is left over from before these new frequencies were added, but I'm
still confirming that with the hardware team.  The note does not appear
on the TGL bspec.

Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>

Matt Roper (2):
  drm/i915: Allow /2 CD2X divider on gen11+
  drm/i915: Add 324mhz and 326.4mhz cdclks for gen11+

 drivers/gpu/drm/i915/display/intel_cdclk.c | 98 +++++++++-------------
 drivers/gpu/drm/i915/i915_reg.h            |  1 +
 2 files changed, 42 insertions(+), 57 deletions(-)

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2.20.1