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| author | Deepak S <deepak.s@linux.intel.com> | 2015-04-29 08:36:24 +0530 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-05-08 13:03:25 +0200 |
| commit | 3ef62342bd854fff5d792d67fc6a8e66f26c862b (patch) | |
| tree | 4cb9531ffc6b8006f8615178ff3116a767469488 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | 3126a660f352b3fe48125a8a0b4fdbf85935d8bf (diff) | |
| download | lwn-3ef62342bd854fff5d792d67fc6a8e66f26c862b.tar.gz lwn-3ef62342bd854fff5d792d67fc6a8e66f26c862b.zip | |
drm/i915: Setup static bias for GPU
Based on the spec, Setting up static BIAS for GPU to improve the
rps performace.
v2: rename reg defn to match spec. (Ville)
v3: Updated bias setting for chv (Deepak)
Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index a7516ed24eee..8812fffeac5e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5082,6 +5082,12 @@ static void cherryview_enable_rps(struct drm_device *dev) GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_AVG); + /* Setting Fixed Bias */ + val = VLV_OVERRIDE_EN | + VLV_SOC_TDP_EN | + CHV_BIAS_CPU_50_SOC_50; + vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val); + val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); /* RPS code assumes GPLL is used */ @@ -5166,6 +5172,12 @@ static void valleyview_enable_rps(struct drm_device *dev) I915_WRITE(GEN6_RC_CONTROL, rc6_mode); + /* Setting Fixed Bias */ + val = VLV_OVERRIDE_EN | + VLV_SOC_TDP_EN | + VLV_BIAS_CPU_125_SOC_875; + vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val); + val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); /* RPS code assumes GPLL is used */ |