static void vlv_set_power_well(struct drm_i915_private *dev_priv, struct i915_power_well *power_well, bool enable) { enum punit_power_well power_well_id = power_well->data; u32 mask; u32 state; u32 ctrl; mask = PUNIT_PWRGT_MASK(power_well_id); state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) : PUNIT_PWRGT_PWR_GATE(power_well_id); mutex_lock(&dev_priv->rps.hw_lock); #define COND \ ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) if (COND) goto out; ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); ctrl &= ~mask; ctrl |= state; vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); if (wait_for(COND, 100)) DRM_ERROR("timout setting power well state %08x (%08x)\n", state, vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); #undef COND out: mutex_unlock(&dev_priv->rps.hw_lock); }
static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, struct i915_power_well *power_well, bool enable) { enum pipe pipe = power_well->data; u32 state; u32 ctrl; state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); mutex_lock(&dev_priv->rps.hw_lock); #define COND \ ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state) if (COND) goto out; ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); ctrl &= ~DP_SSC_MASK(pipe); ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl); if (wait_for(COND, 100)) DRM_ERROR("timout setting power well state %08x (%08x)\n", state, vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ)); #undef COND out: mutex_unlock(&dev_priv->rps.hw_lock); }
void intel_uncore_sanitize(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 reg_val; /* BIOS often leaves RC6 enabled, but disable it for hw init */ intel_disable_gt_powersave(dev); /* Turn off power gate, require especially for the BIOS less system */ if (IS_VALLEYVIEW(dev)) { mutex_lock(&dev_priv->rps.hw_lock); reg_val = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS); if (reg_val & (RENDER_PWRGT | MEDIA_PWRGT | DISP2D_PWRGT)) vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, 0x0); mutex_unlock(&dev_priv->rps.hw_lock); } }