diff options
author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-03-04 21:43:02 +0200 |
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committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-04-05 21:17:39 +0300 |
commit | c30fec656d1336a453bd4cb769a7c5e5c577e3b1 (patch) | |
tree | 620dade5052172ee1fdd68d8b9324bd098cd8896 /fs | |
parent | d761701c55a99598477f3cb25c03d939a7711e74 (diff) |
drm/i915: Use GPLL ref clock to calculate GPU freqs on VLV/CHV
Extract the GPLL reference frequency from CCK and use it in the
GPU freq<->opcode conversions on VLV/CHV. This eliminates all the
assumptions we have about which divider is used for which czclk
frequency.
Note that unlike most clocks from CCK, the GPLL ref clock is a divided
down version of the CZ clock rather than the HPLL clock. CZ clock itself
is a divided down version of the HPLL clock though, so in effect it just
gets divided down twice.
While at it, throw in a few comments explaining the remaining constants
for anyone who later wants to compare this to the spreadsheets.
v2: Add slow/fast notes for CHV clocks (Imre)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1457120584-26080-2-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com> (v1)
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions