[PATCH] add debug information to help debug PSR2 SU blocks issue

[José Roberto de Souza]

---
 drivers/gpu/drm/i915/display/intel_psr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 505ec89459fa..b9f442692ae6 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -501,13 +501,16 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 	u32 val;
 
+	DRM_DEBUG_KMS("PSR2 activate\n");
 	val = psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
+	DRM_DEBUG_KMS("\tidle frames=%i\n", val);
 
 	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
 	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
 		val |= EDP_Y_COORDINATE_ENABLE;
 
 	val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency + 1);
+	DRM_DEBUG_KMS("\tFRAMES_BEFORE_SU=%i\n", dev_priv->psr.sink_sync_latency + 1);
 
 	if (dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us >= 0 &&
 	    dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us <= 50)
@@ -525,6 +528,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 	 */
 	I915_WRITE(EDP_PSR_CTL(dev_priv->psr.transcoder), 0);
 
+	DRM_DEBUG_KMS("PSR2_CTL=0x%x\n", val);
 	I915_WRITE(EDP_PSR2_CTL(dev_priv->psr.transcoder), val);
 }
 
-- 
2.25.0