[PATCH 1/3] Add Debug prints

[Manasi Navare]

Print out HPD live status before and after edp_panel_on
and before starting link train

Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c | 12 +++++++++++-
 drivers/gpu/drm/i915/intel_dp.c  | 10 +++++++---
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 80e96f1..6012e83 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2012,13 +2012,19 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	enum port port = intel_ddi_get_encoder_port(encoder);
 	struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
+	bool test = false;
 
 	WARN_ON(link_mst && (port == PORT_A || port == PORT_E));
 
 	intel_dp_set_link_params(intel_dp, link_rate, lane_count,
 				 link_mst);
-	if (encoder->type == INTEL_OUTPUT_EDP)
+	if (encoder->type == INTEL_OUTPUT_EDP) {
+		test = intel_digital_port_connected(dev_priv, dig_port);
+		DRM_DEBUG_KMS("\nManasi Debug: HPD Live status before turning Panel On = %d", test);
 		intel_edp_panel_on(intel_dp);
+		test = intel_digital_port_connected(dev_priv, dig_port);
+		DRM_DEBUG_KMS("\nManasi Debug: HPD Live status after turning Panel On = %d", test);
+	}
 
 	intel_ddi_clk_select(encoder, pll);
 
@@ -2026,7 +2032,11 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 
 	intel_prepare_dp_ddi_buffers(encoder);
 	intel_ddi_init_dp_buf_reg(encoder);
+	test = intel_digital_port_connected(dev_priv, dig_port);
+	DRM_DEBUG_KMS("\nManasi Debug: HPD Live status = %d", test);
 	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
+	test = intel_digital_port_connected(dev_priv, dig_port);
+	DRM_DEBUG_KMS("\nManasi Debug: HPD Live status = %d", test);
 	intel_dp_start_link_train(intel_dp);
 	if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
 		intel_dp_stop_link_train(intel_dp);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index bca4ac1..22f7014 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1969,9 +1969,11 @@ static void wait_panel_power_cycle(struct intel_dp *intel_dp)
 
 	/* When we disable the VDD override bit last we have to do the manual
 	 * wait. */
-	if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
+	if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay) {
+		DRM_DEBUG_KMS("\nManasi Debug: Waiting t11_t12 time");
 		wait_remaining_ms_from_jiffies(jiffies,
 				       intel_dp->panel_power_cycle_delay - panel_power_off_duration);
+	}
 
 	wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
 }
@@ -2213,6 +2215,7 @@ static void edp_panel_on(struct intel_dp *intel_dp)
 
 	wait_panel_on(intel_dp);
 	intel_dp->last_power_on = jiffies;
+	DRM_DEBUG_KMS("\nManasi: Last Power On for eDp at %ld", intel_dp->last_power_on);
 
 	if (IS_GEN5(dev_priv)) {
 		pp |= PANEL_POWER_RESET; /* restore panel reset bit */
@@ -5231,6 +5234,7 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
 
 	intel_pps_readout_hw_state(dev_priv, intel_dp, &cur);
 
+	DRM_DEBUG_KMS("\nManasi Debug: PPS Values to be programmed at init_panel_power time ");
 	intel_pps_dump_state("cur", &cur);
 
 	vbt = dev_priv->vbt.edp.pps;
@@ -5269,7 +5273,7 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
 	intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
 #undef get_delay
 
-	DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
+	DRM_DEBUG_KMS("Manasi Debug final delay values: panel power up delay %d, power down delay %d, power cycle delay %d\n",
 		      intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
 		      intel_dp->panel_power_cycle_delay);
 
@@ -5365,7 +5369,7 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
 	else
 		I915_WRITE(regs.pp_div, pp_div);
 
-	DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
+	DRM_DEBUG_KMS("Manasi Debug at edp_init panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
 		      I915_READ(regs.pp_on),
 		      I915_READ(regs.pp_off),
 		      (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv)) ?
-- 
2.1.4