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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-06-28 20:04:16 (GMT) |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-06-28 20:54:27 (GMT) |
| commit | 23b2f8bb92feb83127679c53633def32d3108e70 (patch) | |
| tree | 95d007f504488f5988e638f2504ba94372f142bc /drivers/gpu/drm/i915/intel_drv.h | |
| parent | 3d73710880afa3d61cf57b5d4eb192e812eb7e4f (diff) | |
| download | linux-fsl-qoriq-23b2f8bb92feb83127679c53633def32d3108e70.tar.xz | |
drm/i915: load a ring frequency scaling table v3
The ring frequency scaling table tells the PCU to treat certain GPU
frequencies as if they were a given CPU frequency for purposes of
scaling the ring frequency. Normally the PCU will scale the ring
frequency based on the CPU P-state, but with the table present, it will
also take the GPU frequency into account.
The main downside of keeping the ring frequency high while the CPU is
at a low frequency (or asleep altogether) is increased power
consumption. But then if you're keeping your GPU busy, you probably
want the extra performance.
v2:
- add units to debug table header (from Eric)
- use tsc_khz as a fallback if the cpufreq driver doesn't give us a freq
(from Chris)
v3:
- fix comments & debug output
- remove unneeded force wake get/put
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 9ffa61e..8ac3bd8 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -317,6 +317,7 @@ extern void intel_enable_clock_gating(struct drm_device *dev); extern void ironlake_enable_drps(struct drm_device *dev); extern void ironlake_disable_drps(struct drm_device *dev); extern void gen6_enable_rps(struct drm_i915_private *dev_priv); +extern void gen6_update_ring_freq(struct drm_i915_private *dev_priv); extern void gen6_disable_rps(struct drm_device *dev); extern void intel_init_emon(struct drm_device *dev); |