diff options
| author | Rodrigo Vivi | 2017-10-24 00:46:12 +0200 |
|---|---|---|
| committer | Rodrigo Vivi | 2017-10-24 19:20:29 +0200 |
| commit | 0aab201b4ad10fa530e4d12f8ea30b6f0a0540bd (patch) | |
| tree | 433584d1cfa8a67442e0c118dd9fab590e50ae6d /drivers/gpu/drm/i915/intel_pm.c | |
| parent | drm/i915/cnl: Force DDI_A_4_LANES when needed. (diff) | |
| download | kernel-qcow2-linux-0aab201b4ad10fa530e4d12f8ea30b6f0a0540bd.tar.gz kernel-qcow2-linux-0aab201b4ad10fa530e4d12f8ea30b6f0a0540bd.tar.xz kernel-qcow2-linux-0aab201b4ad10fa530e4d12f8ea30b6f0a0540bd.zip | |
drm/i915/cnl: Get RC6 working.
On CNL, individual wake rate limit was added to each engine.
GT can only go to RC6 if both Render and Media engines are
individually qualified. So we need to set their individual
wake rate limit.
+-----------------+---------------+--------------+--------------+
| | GT RC6 | Render C6 | Media C6 |
+-----------------+---------------+--------------+--------------+
| Wake rate limit | 0xA09C[31:16] | 0xA09C[15:0] | 0xA0A0[15:0] |
+-----------------+---------------+--------------+--------------+
v2: - Tune Render and Media wake rate values according to some extra
info I got from HW engineers. Value can be tuned, but for now
these are the recommended values.
- Fix typos pointed by James.
Cc: Nathan Ciobanu <nathan.d.ciobanu@intel.com>
Cc: Wayne Boyer <wayne.boyer@intel.com>
Cc: Joe Konno <joe.konno@linux.intel.com>
Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: James Ausmus <james.ausmus@intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171023224612.27208-1-rodrigo.vivi@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index c42a65a93b3a..1ead51754e8f 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6604,12 +6604,19 @@ static void gen9_enable_rc6(struct drm_i915_private *dev_priv) I915_WRITE(GEN6_RC_CONTROL, 0); /* 2b: Program RC6 thresholds.*/ - - /* WaRsDoubleRc6WrlWithCoarsePowerGating: Doubling WRL only when CPG is enabled */ - if (IS_SKYLAKE(dev_priv)) + if (INTEL_GEN(dev_priv) >= 10) { + I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16 | 85); + I915_WRITE(GEN10_MEDIA_WAKE_RATE_LIMIT, 150); + } else if (IS_SKYLAKE(dev_priv)) { + /* + * WaRsDoubleRc6WrlWithCoarsePowerGating:skl Doubling WRL only + * when CPG is enabled + */ I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 108 << 16); - else + } else { I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16); + } + I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */ I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */ for_each_engine(engine, dev_priv, id) |