diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_runtime_pm.c | 9 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 6ed7141c9505..439bb27a63be 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1149,6 +1149,7 @@ enum skl_disp_power_wells { #define DPIO_SUS_CLK_CONFIG_GATE_CLKREQ (3 << 0) #define CHV_CMN_DW30 0x8178 +#define DPIO_CL2_LDOFUSE_PWRENB (1 << 6) #define DPIO_LRC_BYPASS (1 << 3) #define _TXLANE(ch, lane, offset) ((ch ? 0x2400 : 0) + \ diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index ef043b2c06b2..a0df156ee92e 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -996,6 +996,15 @@ static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1); tmp |= DPIO_DYNPWRDOWNEN_CH1; vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp); + } else { + /* + * Force the non-existing CL2 off. BXT does this + * too, so maybe it saves some power even though + * CL2 doesn't exist? + */ + tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); + tmp |= DPIO_CL2_LDOFUSE_PWRENB; + vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp); } mutex_unlock(&dev_priv->sb_lock); |