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* [PATCH 0/2] New cdclk values for gen11+
@ 2019-08-26 22:55 Matt Roper
  2019-08-26 22:55 ` [PATCH 1/2] drm/i915: Allow /2 CD2X divider on gen11+ Matt Roper
                   ` (5 more replies)
  0 siblings, 6 replies; 10+ messages in thread
From: Matt Roper @ 2019-08-26 22:55 UTC (permalink / raw)
  To: intel-gfx; +Cc: Lucas De Marchi

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@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@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(-)

-- 
2.20.1

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^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2019-08-30 22:49 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-26 22:55 [PATCH 0/2] New cdclk values for gen11+ Matt Roper
2019-08-26 22:55 ` [PATCH 1/2] drm/i915: Allow /2 CD2X divider on gen11+ Matt Roper
2019-08-27 13:52   ` Ville Syrjälä
2019-08-30  0:48     ` [PATCH v2 " Matt Roper
2019-08-26 22:55 ` [PATCH 2/2] drm/i915: Add 324mhz and 326.4mhz cdclks for gen11+ Matt Roper
2019-08-27  9:19 ` ✓ Fi.CI.BAT: success for New cdclk values " Patchwork
2019-08-27 13:33 ` ✓ Fi.CI.IGT: " Patchwork
2019-08-30  1:27 ` ✓ Fi.CI.BAT: success for New cdclk values for gen11+ (rev2) Patchwork
2019-08-30 21:47 ` ✓ Fi.CI.IGT: " Patchwork
2019-08-30 22:49   ` Matt Roper

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