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| author |   Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2017-03-15 18:07:13 +0200 |
|---|---|---|
| committer |   Mika Kuoppala <mika.kuoppala@intel.com> | 2017-03-16 12:28:28 +0200 |
| commit | 47c21d9a1a7b4b3177dde686ce0eb71cdf25e07b (patch) | |
| tree | fc51595627946c7fbdbe0009d5a2c1950d9d2a93 /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | drm/i915: Return residency as microseconds (diff) | |
| download | linux-dev-47c21d9a1a7b4b3177dde686ce0eb71cdf25e07b.tar.xz linux-dev-47c21d9a1a7b4b3177dde686ce0eb71cdf25e07b.zip | |
drm/i915: Extend vlv/chv residency resolution
Vlv and chv residency counters are 40 bits in width.
With a control bit, we can choose between upper or lower
32 bit window into this counter.
Lets toggle this bit on and off on and read both parts.
As a result we can push the wrap from 13 seconds to 54
minutes.
v2: commit msg, loop readability, goto elimination (Chris)
v3: bug ref, divide outside runtime pm lock (Chris)
References: https://bugs.freedesktop.org/show_bug.cgi?id=94852
Reported-by: Len Brown <len.brown@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
0 files changed, 0 insertions, 0 deletions