[Intel-gfx] [PATCH 02/10] drm/i915: VLV PSR: Status/enabled function.

[Rodrigo Vivi]

VLV PSR support PSR per pipe, including the status. So we have to check
if it is enabled per pipe on status.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 82e47da..774eb6c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2076,7 +2076,26 @@ static bool is_edp_psr(struct intel_dp *intel_dp)
 	return intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED;
 }
 
-static bool intel_edp_is_psr_enabled(struct drm_device *dev)
+/**
+ * vlv_edp_is_psr_enabled_on_pipe
+ * @dev: DRM device
+ * @pipe: pipe to check for PSR status.
+ *
+ * VLV PSR implements PSR per pipe. This function allows to check if it is
+ * enabled on given pipe.
+ */
+static bool vlv_edp_is_psr_enabled_on_pipe(struct drm_device *dev, int pipe)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	uint32_t val;
+
+	val = I915_READ(VLV_PSRSTAT(pipe)) &
+		VLV_EDP_PSR_CURR_STATE_MASK;
+	return (val == VLV_EDP_PSR_ACTIVE_NORFB_UP) ||
+		(val == VLV_EDP_PSR_ACTIVE_SF_UPDATE);
+}
+
+static bool hsw_edp_is_psr_enabled(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
@@ -5066,7 +5085,7 @@ void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate)
 	 * hard to tell without seeing the user of this function of this code.
 	 * Check locking and ordering once that lands.
 	 */
-	if (INTEL_INFO(dev)->gen < 8 && intel_edp_is_psr_enabled(dev)) {
+	if (IS_HASWELL(dev) && hsw_edp_is_psr_enabled(dev)) {
 		DRM_DEBUG_KMS("DRRS is disabled as PSR is enabled\n");
 		return;
 	}
-- 
1.9.3