1 files changed, 327 insertions, 186 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 152d945..891f4f1 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -42,15 +42,13 @@
 
 #define DP_LINK_CONFIGURATION_SIZE	9
 
-#define IS_eDP(i) ((i)->base.type == INTEL_OUTPUT_EDP)
-#define IS_PCH_eDP(i) ((i)->is_pch_edp)
-
 struct intel_dp {
 	struct intel_encoder base;
 	uint32_t output_reg;
 	uint32_t DP;
 	uint8_t  link_configuration[DP_LINK_CONFIGURATION_SIZE];
 	bool has_audio;
+	int force_audio;
 	int dpms_mode;
 	uint8_t link_bw;
 	uint8_t lane_count;
@@ -60,8 +58,35 @@ struct intel_dp {
 	bool is_pch_edp;
 	uint8_t	train_set[4];
 	uint8_t link_status[DP_LINK_STATUS_SIZE];
+
+	struct drm_property *force_audio_property;
 };
 
+/**
+ * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
+ * @intel_dp: DP struct
+ *
+ * If a CPU or PCH DP output is attached to an eDP panel, this function
+ * will return true, and false otherwise.
+ */
+static bool is_edp(struct intel_dp *intel_dp)
+{
+	return intel_dp->base.type == INTEL_OUTPUT_EDP;
+}
+
+/**
+ * is_pch_edp - is the port on the PCH and attached to an eDP panel?
+ * @intel_dp: DP struct
+ *
+ * Returns true if the given DP struct corresponds to a PCH DP port attached
+ * to an eDP panel, false otherwise.  Helpful for determining whether we
+ * may need FDI resources for a given DP output or not.
+ */
+static bool is_pch_edp(struct intel_dp *intel_dp)
+{
+	return intel_dp->is_pch_edp;
+}
+
 static struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder)
 {
 	return container_of(encoder, struct intel_dp, base.base);
@@ -73,6 +98,25 @@ static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
 			    struct intel_dp, base);
 }
 
+/**
+ * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP?
+ * @encoder: DRM encoder
+ *
+ * Return true if @encoder corresponds to a PCH attached eDP panel.  Needed
+ * by intel_display.c.
+ */
+bool intel_encoder_is_pch_edp(struct drm_encoder *encoder)
+{
+	struct intel_dp *intel_dp;
+
+	if (!encoder)
+		return false;
+
+	intel_dp = enc_to_intel_dp(encoder);
+
+	return is_pch_edp(intel_dp);
+}
+
 static void intel_dp_start_link_train(struct intel_dp *intel_dp);
 static void intel_dp_complete_link_train(struct intel_dp *intel_dp);
 static void intel_dp_link_down(struct intel_dp *intel_dp);
@@ -138,7 +182,7 @@ intel_dp_link_required(struct drm_device *dev, struct intel_dp *intel_dp, int pi
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+	if (is_edp(intel_dp))
 		return (pixel_clock * dev_priv->edp.bpp + 7) / 8;
 	else
 		return pixel_clock * 3;
@@ -160,8 +204,7 @@ intel_dp_mode_valid(struct drm_connector *connector,
 	int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp));
 	int max_lanes = intel_dp_max_lane_count(intel_dp);
 
-	if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
-	    dev_priv->panel_fixed_mode) {
+	if (is_edp(intel_dp) && dev_priv->panel_fixed_mode) {
 		if (mode->hdisplay > dev_priv->panel_fixed_mode->hdisplay)
 			return MODE_PANEL;
 
@@ -171,7 +214,7 @@ intel_dp_mode_valid(struct drm_connector *connector,
 
 	/* only refuse the mode on non eDP since we have seen some wierd eDP panels
 	   which are outside spec tolerances but somehow work by magic */
-	if (!IS_eDP(intel_dp) &&
+	if (!is_edp(intel_dp) &&
 	    (intel_dp_link_required(connector->dev, intel_dp, mode->clock)
 	     > intel_dp_max_data_rate(max_link_clock, max_lanes)))
 		return MODE_CLOCK_HIGH;
@@ -258,7 +301,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
 	 * Note that PCH attached eDP panels should use a 125MHz input
 	 * clock divider.
 	 */
-	if (IS_eDP(intel_dp) && !IS_PCH_eDP(intel_dp)) {
+	if (is_edp(intel_dp) && !is_pch_edp(intel_dp)) {
 		if (IS_GEN6(dev))
 			aux_clock_divider = 200; /* SNB eDP input clock at 400Mhz */
 		else
@@ -530,8 +573,7 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
 	int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0;
 	static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
 
-	if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
-	    dev_priv->panel_fixed_mode) {
+	if (is_edp(intel_dp) && dev_priv->panel_fixed_mode) {
 		intel_fixed_panel_mode(dev_priv->panel_fixed_mode, adjusted_mode);
 		intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN,
 					mode, adjusted_mode);
@@ -542,6 +584,17 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
 		mode->clock = dev_priv->panel_fixed_mode->clock;
 	}
 
+	/* Just use VBT values for eDP */
+	if (is_edp(intel_dp)) {
+		intel_dp->lane_count = dev_priv->edp.lanes;
+		intel_dp->link_bw = dev_priv->edp.rate;
+		adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw);
+		DRM_DEBUG_KMS("eDP link bw %02x lane count %d clock %d\n",
+			      intel_dp->link_bw, intel_dp->lane_count,
+			      adjusted_mode->clock);
+		return true;
+	}
+
 	for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
 		for (clock = 0; clock <= max_clock; clock++) {
 			int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count);
@@ -560,19 +613,6 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
 		}
 	}
 
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
-		/* okay we failed just pick the highest */
-		intel_dp->lane_count = max_lane_count;
-		intel_dp->link_bw = bws[max_clock];
-		adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw);
-		DRM_DEBUG_KMS("Force picking display port link bw %02x lane "
-			      "count %d clock %d\n",
-			      intel_dp->link_bw, intel_dp->lane_count,
-			      adjusted_mode->clock);
-
-		return true;
-	}
-
 	return false;
 }
 
@@ -609,25 +649,6 @@ intel_dp_compute_m_n(int bpp,
 	intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
 }
 
-bool intel_pch_has_edp(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_encoder *encoder;
-
-	list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-		struct intel_dp *intel_dp;
-
-		if (encoder->crtc != crtc)
-			continue;
-
-		intel_dp = enc_to_intel_dp(encoder);
-		if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT)
-			return intel_dp->is_pch_edp;
-	}
-	return false;
-}
-
 void
 intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		 struct drm_display_mode *adjusted_mode)
@@ -652,8 +673,10 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		intel_dp = enc_to_intel_dp(encoder);
 		if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT) {
 			lane_count = intel_dp->lane_count;
-			if (IS_PCH_eDP(intel_dp))
-				bpp = dev_priv->edp.bpp;
+			break;
+		} else if (is_edp(intel_dp)) {
+			lane_count = dev_priv->edp.lanes;
+			bpp = dev_priv->edp.bpp;
 			break;
 		}
 	}
@@ -720,7 +743,7 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 		intel_dp->DP |= DP_SYNC_VS_HIGH;
 
-	if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
+	if (HAS_PCH_CPT(dev) && !is_edp(intel_dp))
 		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
 	else
 		intel_dp->DP |= DP_LINK_TRAIN_OFF;
@@ -755,7 +778,7 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 	if (intel_crtc->pipe == 1 && !HAS_PCH_CPT(dev))
 		intel_dp->DP |= DP_PIPEB_SELECT;
 
-	if (IS_eDP(intel_dp)) {
+	if (is_edp(intel_dp) && !is_pch_edp(intel_dp)) {
 		/* don't miss out required setting for eDP */
 		intel_dp->DP |= DP_PLL_ENABLE;
 		if (adjusted_mode->clock < 200000)
@@ -766,10 +789,11 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 }
 
 /* Returns true if the panel was already on when called */
-static bool ironlake_edp_panel_on (struct drm_device *dev)
+static bool ironlake_edp_panel_on (struct intel_dp *intel_dp)
 {
+	struct drm_device *dev = intel_dp->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 pp;
+	u32 pp, idle_on_mask = PP_ON | PP_SEQUENCE_STATE_ON_IDLE;
 
 	if (I915_READ(PCH_PP_STATUS) & PP_ON)
 		return true;
@@ -781,19 +805,20 @@ static bool ironlake_edp_panel_on (struct drm_device *dev)
 	I915_WRITE(PCH_PP_CONTROL, pp);
 	POSTING_READ(PCH_PP_CONTROL);
 
-	pp |= POWER_TARGET_ON;
+	pp |= PANEL_UNLOCK_REGS | POWER_TARGET_ON;
 	I915_WRITE(PCH_PP_CONTROL, pp);
+	POSTING_READ(PCH_PP_CONTROL);
 
 	/* Ouch. We need to wait here for some panels, like Dell e6510
 	 * https://bugs.freedesktop.org/show_bug.cgi?id=29278i
 	 */
 	msleep(300);
 
-	if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000))
+	if (wait_for((I915_READ(PCH_PP_STATUS) & idle_on_mask) == idle_on_mask,
+		     5000))
 		DRM_ERROR("panel on wait timed out: 0x%08x\n",
 			  I915_READ(PCH_PP_STATUS));
 
-	pp &= ~(PANEL_UNLOCK_REGS);
 	pp |= PANEL_POWER_RESET; /* restore panel reset bit */
 	I915_WRITE(PCH_PP_CONTROL, pp);
 	POSTING_READ(PCH_PP_CONTROL);
@@ -804,7 +829,8 @@ static bool ironlake_edp_panel_on (struct drm_device *dev)
 static void ironlake_edp_panel_off (struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 pp;
+	u32 pp, idle_off_mask = PP_ON | PP_SEQUENCE_MASK |
+		PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK;
 
 	pp = I915_READ(PCH_PP_CONTROL);
 
@@ -815,12 +841,12 @@ static void ironlake_edp_panel_off (struct drm_device *dev)
 
 	pp &= ~POWER_TARGET_ON;
 	I915_WRITE(PCH_PP_CONTROL, pp);
+	POSTING_READ(PCH_PP_CONTROL);
 
-	if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000))
+	if (wait_for((I915_READ(PCH_PP_STATUS) & idle_off_mask) == 0, 5000))
 		DRM_ERROR("panel off wait timed out: 0x%08x\n",
 			  I915_READ(PCH_PP_STATUS));
 
-	/* Make sure VDD is enabled so DP AUX will work */
 	pp |= PANEL_POWER_RESET; /* restore panel reset bit */
 	I915_WRITE(PCH_PP_CONTROL, pp);
 	POSTING_READ(PCH_PP_CONTROL);
@@ -831,36 +857,19 @@ static void ironlake_edp_panel_off (struct drm_device *dev)
 	msleep(300);
 }
 
-static void ironlake_edp_panel_vdd_on(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 pp;
-
-	pp = I915_READ(PCH_PP_CONTROL);
-	pp |= EDP_FORCE_VDD;
-	I915_WRITE(PCH_PP_CONTROL, pp);
-	POSTING_READ(PCH_PP_CONTROL);
-	msleep(300);
-}
-
-static void ironlake_edp_panel_vdd_off(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 pp;
-
-	pp = I915_READ(PCH_PP_CONTROL);
-	pp &= ~EDP_FORCE_VDD;
-	I915_WRITE(PCH_PP_CONTROL, pp);
-	POSTING_READ(PCH_PP_CONTROL);
-	msleep(300);
-}
-
 static void ironlake_edp_backlight_on (struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 pp;
 
 	DRM_DEBUG_KMS("\n");
+	/*
+	 * If we enable the backlight right away following a panel power
+	 * on, we may see slight flicker as the panel syncs with the eDP
+	 * link.  So delay a bit to make sure the image is solid before
+	 * allowing it to appear.
+	 */
+	msleep(300);
 	pp = I915_READ(PCH_PP_CONTROL);
 	pp |= EDP_BLC_ENABLE;
 	I915_WRITE(PCH_PP_CONTROL, pp);
@@ -885,8 +894,10 @@ static void ironlake_edp_pll_on(struct drm_encoder *encoder)
 
 	DRM_DEBUG_KMS("\n");
 	dpa_ctl = I915_READ(DP_A);
-	dpa_ctl &= ~DP_PLL_ENABLE;
+	dpa_ctl |= DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
+	POSTING_READ(DP_A);
+	udelay(200);
 }
 
 static void ironlake_edp_pll_off(struct drm_encoder *encoder)
@@ -896,7 +907,7 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder)
 	u32 dpa_ctl;
 
 	dpa_ctl = I915_READ(DP_A);
-	dpa_ctl |= DP_PLL_ENABLE;
+	dpa_ctl &= ~DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
 	POSTING_READ(DP_A);
 	udelay(200);
@@ -906,17 +917,16 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
 {
 	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
-		ironlake_edp_panel_off(dev);
+	if (is_edp(intel_dp)) {
 		ironlake_edp_backlight_off(dev);
-		ironlake_edp_panel_vdd_on(dev);
-		ironlake_edp_pll_on(encoder);
+		ironlake_edp_panel_on(intel_dp);
+		if (!is_pch_edp(intel_dp))
+			ironlake_edp_pll_on(encoder);
+		else
+			ironlake_edp_pll_off(encoder);
 	}
-	if (dp_reg & DP_PORT_EN)
-		intel_dp_link_down(intel_dp);
+	intel_dp_link_down(intel_dp);
 }
 
 static void intel_dp_commit(struct drm_encoder *encoder)
@@ -926,14 +936,13 @@ static void intel_dp_commit(struct drm_encoder *encoder)
 
 	intel_dp_start_link_train(intel_dp);
 
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
-		ironlake_edp_panel_on(dev);
+	if (is_edp(intel_dp))
+		ironlake_edp_panel_on(intel_dp);
 
 	intel_dp_complete_link_train(intel_dp);
 
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+	if (is_edp(intel_dp))
 		ironlake_edp_backlight_on(dev);
-	intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
 }
 
 static void
@@ -945,23 +954,22 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
 	uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
 	if (mode != DRM_MODE_DPMS_ON) {
-		if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
+		if (is_edp(intel_dp))
 			ironlake_edp_backlight_off(dev);
+		intel_dp_link_down(intel_dp);
+		if (is_edp(intel_dp))
 			ironlake_edp_panel_off(dev);
-		}
-		if (dp_reg & DP_PORT_EN)
-			intel_dp_link_down(intel_dp);
-		if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+		if (is_edp(intel_dp) && !is_pch_edp(intel_dp))
 			ironlake_edp_pll_off(encoder);
 	} else {
+		if (is_edp(intel_dp))
+			ironlake_edp_panel_on(intel_dp);
 		if (!(dp_reg & DP_PORT_EN)) {
 			intel_dp_start_link_train(intel_dp);
-			if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
-				ironlake_edp_panel_on(dev);
 			intel_dp_complete_link_train(intel_dp);
-			if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
-				ironlake_edp_backlight_on(dev);
 		}
+		if (is_edp(intel_dp))
+			ironlake_edp_backlight_on(dev);
 	}
 	intel_dp->dpms_mode = mode;
 }
@@ -1079,11 +1087,21 @@ intel_get_adjust_train(struct intel_dp *intel_dp)
 }
 
 static uint32_t
-intel_dp_signal_levels(uint8_t train_set, int lane_count)
+intel_dp_signal_levels(struct intel_dp *intel_dp)
 {
-	uint32_t	signal_levels = 0;
+	struct drm_device *dev = intel_dp->base.base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	uint32_t signal_levels = 0;
+	u8 train_set = intel_dp->train_set[0];
+	u32 vswing = train_set & DP_TRAIN_VOLTAGE_SWING_MASK;
+	u32 preemphasis = train_set & DP_TRAIN_PRE_EMPHASIS_MASK;
+
+	if (is_edp(intel_dp)) {
+		vswing = dev_priv->edp.vswing;
+		preemphasis = dev_priv->edp.preemphasis;
+	}
 
-	switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
+	switch (vswing) {
 	case DP_TRAIN_VOLTAGE_SWING_400:
 	default:
 		signal_levels |= DP_VOLTAGE_0_4;
@@ -1098,7 +1116,7 @@ intel_dp_signal_levels(uint8_t train_set, int lane_count)
 		signal_levels |= DP_VOLTAGE_1_2;
 		break;
 	}
-	switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
+	switch (preemphasis) {
 	case DP_TRAIN_PRE_EMPHASIS_0:
 	default:
 		signal_levels |= DP_PRE_EMPHASIS_0;
@@ -1185,6 +1203,18 @@ intel_channel_eq_ok(struct intel_dp *intel_dp)
 }
 
 static bool
+intel_dp_aux_handshake_required(struct intel_dp *intel_dp)
+{
+	struct drm_device *dev = intel_dp->base.base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (is_edp(intel_dp) && dev_priv->no_aux_handshake)
+		return false;
+
+	return true;
+}
+
+static bool
 intel_dp_set_link_train(struct intel_dp *intel_dp,
 			uint32_t dp_reg_value,
 			uint8_t dp_train_pat)
@@ -1196,6 +1226,9 @@ intel_dp_set_link_train(struct intel_dp *intel_dp,
 	I915_WRITE(intel_dp->output_reg, dp_reg_value);
 	POSTING_READ(intel_dp->output_reg);
 
+	if (!intel_dp_aux_handshake_required(intel_dp))
+		return true;
+
 	intel_dp_aux_native_write_1(intel_dp,
 				    DP_TRAINING_PATTERN_SET,
 				    dp_train_pat);
@@ -1228,13 +1261,14 @@ intel_dp_start_link_train(struct intel_dp *intel_dp)
 	POSTING_READ(intel_dp->output_reg);
 	intel_wait_for_vblank(dev, intel_crtc->pipe);
 
-	/* Write the link configuration data */
-	intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET,
-				  intel_dp->link_configuration,
-				  DP_LINK_CONFIGURATION_SIZE);
+	if (intel_dp_aux_handshake_required(intel_dp))
+		/* Write the link configuration data */
+		intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET,
+					  intel_dp->link_configuration,
+					  DP_LINK_CONFIGURATION_SIZE);
 
 	DP |= DP_PORT_EN;
-	if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
+	if (HAS_PCH_CPT(dev) && !is_edp(intel_dp))
 		DP &= ~DP_LINK_TRAIN_MASK_CPT;
 	else
 		DP &= ~DP_LINK_TRAIN_MASK;
@@ -1245,15 +1279,15 @@ intel_dp_start_link_train(struct intel_dp *intel_dp)
 	for (;;) {
 		/* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
 		uint32_t    signal_levels;
-		if (IS_GEN6(dev) && IS_eDP(intel_dp)) {
+		if (IS_GEN6(dev) && is_edp(intel_dp)) {
 			signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
 			DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
 		} else {
-			signal_levels = intel_dp_signal_levels(intel_dp->train_set[0], intel_dp->lane_count);
+			signal_levels = intel_dp_signal_levels(intel_dp);
 			DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
 		}
 
-		if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
+		if (HAS_PCH_CPT(dev) && !is_edp(intel_dp))
 			reg = DP | DP_LINK_TRAIN_PAT_1_CPT;
 		else
 			reg = DP | DP_LINK_TRAIN_PAT_1;
@@ -1263,33 +1297,37 @@ intel_dp_start_link_train(struct intel_dp *intel_dp)
 			break;
 		/* Set training pattern 1 */
 
-		udelay(100);
-		if (!intel_dp_get_link_status(intel_dp))
-			break;
-
-		if (intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
-			clock_recovery = true;
+		udelay(500);
+		if (intel_dp_aux_handshake_required(intel_dp)) {
 			break;
-		}
+		} else {
+			if (!intel_dp_get_link_status(intel_dp))
+				break;
 
-		/* Check to see if we've tried the max voltage */
-		for (i = 0; i < intel_dp->lane_count; i++)
-			if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
+			if (intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
+				clock_recovery = true;
 				break;
-		if (i == intel_dp->lane_count)
-			break;
+			}
 
-		/* Check to see if we've tried the same voltage 5 times */
-		if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
-			++tries;
-			if (tries == 5)
+			/* Check to see if we've tried the max voltage */
+			for (i = 0; i < intel_dp->lane_count; i++)
+				if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
+					break;
+			if (i == intel_dp->lane_count)
 				break;
-		} else
-			tries = 0;
-		voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
 
-		/* Compute new intel_dp->train_set as requested by target */
-		intel_get_adjust_train(intel_dp);
+			/* Check to see if we've tried the same voltage 5 times */
+			if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
+				++tries;
+				if (tries == 5)
+					break;
+			} else
+				tries = 0;
+			voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
+
+			/* Compute new intel_dp->train_set as requested by target */
+			intel_get_adjust_train(intel_dp);
+		}
 	}
 
 	intel_dp->DP = DP;
@@ -1312,15 +1350,15 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp)
 		/* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
 		uint32_t    signal_levels;
 
-		if (IS_GEN6(dev) && IS_eDP(intel_dp)) {
+		if (IS_GEN6(dev) && is_edp(intel_dp)) {
 			signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
 			DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
 		} else {
-			signal_levels = intel_dp_signal_levels(intel_dp->train_set[0], intel_dp->lane_count);
+			signal_levels = intel_dp_signal_levels(intel_dp);
 			DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
 		}
 
-		if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
+		if (HAS_PCH_CPT(dev) && !is_edp(intel_dp))
 			reg = DP | DP_LINK_TRAIN_PAT_2_CPT;
 		else
 			reg = DP | DP_LINK_TRAIN_PAT_2;
@@ -1330,25 +1368,29 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp)
 					     DP_TRAINING_PATTERN_2))
 			break;
 
-		udelay(400);
-		if (!intel_dp_get_link_status(intel_dp))
-			break;
+		udelay(500);
 
-		if (intel_channel_eq_ok(intel_dp)) {
-			channel_eq = true;
+		if (!intel_dp_aux_handshake_required(intel_dp)) {
 			break;
-		}
+		} else {
+			if (!intel_dp_get_link_status(intel_dp))
+				break;
 
-		/* Try 5 times */
-		if (tries > 5)
-			break;
+			if (intel_channel_eq_ok(intel_dp)) {
+				channel_eq = true;
+				break;
+			}
 
-		/* Compute new intel_dp->train_set as requested by target */
-		intel_get_adjust_train(intel_dp);
-		++tries;
-	}
+			/* Try 5 times */
+			if (tries > 5)
+				break;
 
-	if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
+			/* Compute new intel_dp->train_set as requested by target */
+			intel_get_adjust_train(intel_dp);
+			++tries;
+		}
+	}
+	if (HAS_PCH_CPT(dev) && !is_edp(intel_dp))
 		reg = DP | DP_LINK_TRAIN_OFF_CPT;
 	else
 		reg = DP | DP_LINK_TRAIN_OFF;
@@ -1368,14 +1410,14 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 
 	DRM_DEBUG_KMS("\n");
 
-	if (IS_eDP(intel_dp)) {
+	if (is_edp(intel_dp)) {
 		DP &= ~DP_PLL_ENABLE;
 		I915_WRITE(intel_dp->output_reg, DP);
 		POSTING_READ(intel_dp->output_reg);
 		udelay(100);
 	}
 
-	if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp)) {
+	if (HAS_PCH_CPT(dev) && !is_edp(intel_dp)) {
 		DP &= ~DP_LINK_TRAIN_MASK_CPT;
 		I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT);
 	} else {
@@ -1386,7 +1428,7 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 
 	msleep(17);
 
-	if (IS_eDP(intel_dp))
+	if (is_edp(intel_dp))
 		DP |= DP_LINK_TRAIN_OFF;
 	I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
 	POSTING_READ(intel_dp->output_reg);
@@ -1419,48 +1461,34 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
 }
 
 static enum drm_connector_status
-ironlake_dp_detect(struct drm_connector *connector)
+ironlake_dp_detect(struct intel_dp *intel_dp)
 {
-	struct intel_dp *intel_dp = intel_attached_dp(connector);
 	enum drm_connector_status status;
 
-	/* Panel needs power for AUX to work */
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
-		ironlake_edp_panel_vdd_on(connector->dev);
+	/* Can't disconnect eDP */
+	if (is_edp(intel_dp))
+		return connector_status_connected;
+
 	status = connector_status_disconnected;
 	if (intel_dp_aux_native_read(intel_dp,
 				     0x000, intel_dp->dpcd,
-				     sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
-	{
+				     sizeof (intel_dp->dpcd))
+	    == sizeof(intel_dp->dpcd)) {
 		if (intel_dp->dpcd[0] != 0)
 			status = connector_status_connected;
 	}
 	DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0],
 		      intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]);
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
-		ironlake_edp_panel_vdd_off(connector->dev);
 	return status;
 }
 
-/**
- * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection.
- *
- * \return true if DP port is connected.
- * \return false if DP port is disconnected.
- */
 static enum drm_connector_status
-intel_dp_detect(struct drm_connector *connector, bool force)
+g4x_dp_detect(struct intel_dp *intel_dp)
 {
-	struct intel_dp *intel_dp = intel_attached_dp(connector);
 	struct drm_device *dev = intel_dp->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	uint32_t temp, bit;
 	enum drm_connector_status status;
-
-	intel_dp->has_audio = false;
-
-	if (HAS_PCH_SPLIT(dev))
-		return ironlake_dp_detect(connector);
+	uint32_t temp, bit;
 
 	switch (intel_dp->output_reg) {
 	case DP_B:
@@ -1482,14 +1510,51 @@ intel_dp_detect(struct drm_connector *connector, bool force)
 		return connector_status_disconnected;
 
 	status = connector_status_disconnected;
-	if (intel_dp_aux_native_read(intel_dp,
-				     0x000, intel_dp->dpcd,
+	if (intel_dp_aux_native_read(intel_dp, 0x000, intel_dp->dpcd,
 				     sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
 	{
 		if (intel_dp->dpcd[0] != 0)
 			status = connector_status_connected;
 	}
-	return status;
+
+	return bit;
+}
+
+/**
+ * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection.
+ *
+ * \return true if DP port is connected.
+ * \return false if DP port is disconnected.
+ */
+static enum drm_connector_status
+intel_dp_detect(struct drm_connector *connector, bool force)
+{
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	struct drm_device *dev = intel_dp->base.base.dev;
+	enum drm_connector_status status;
+	struct edid *edid = NULL;
+
+	intel_dp->has_audio = false;
+
+	if (HAS_PCH_SPLIT(dev))
+		status = ironlake_dp_detect(intel_dp);
+	else
+		status = g4x_dp_detect(intel_dp);
+	if (status != connector_status_connected)
+		return status;
+
+	if (intel_dp->force_audio) {
+		intel_dp->has_audio = intel_dp->force_audio > 0;
+	} else {
+		edid = drm_get_edid(connector, &intel_dp->adapter);
+		if (edid) {
+			intel_dp->has_audio = drm_detect_monitor_audio(edid);
+			connector->display_info.raw_edid = NULL;
+			kfree(edid);
+		}
+	}
+
+	return connector_status_connected;
 }
 
 static int intel_dp_get_modes(struct drm_connector *connector)
@@ -1504,8 +1569,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
 
 	ret = intel_ddc_get_modes(connector, &intel_dp->adapter);
 	if (ret) {
-		if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
-		    !dev_priv->panel_fixed_mode) {
+		if (is_edp(intel_dp) && !dev_priv->panel_fixed_mode) {
 			struct drm_display_mode *newmode;
 			list_for_each_entry(newmode, &connector->probed_modes,
 					    head) {
@@ -1521,7 +1585,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
 	}
 
 	/* if eDP has no EDID, try to use fixed panel mode from VBT */
-	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
+	if (is_edp(intel_dp)) {
 		if (dev_priv->panel_fixed_mode != NULL) {
 			struct drm_display_mode *mode;
 			mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
@@ -1532,6 +1596,46 @@ static int intel_dp_get_modes(struct drm_connector *connector)
 	return 0;
 }
 
+static int
+intel_dp_set_property(struct drm_connector *connector,
+		      struct drm_property *property,
+		      uint64_t val)
+{
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	int ret;
+
+	ret = drm_connector_property_set_value(connector, property, val);
+	if (ret)
+		return ret;
+
+	if (property == intel_dp->force_audio_property) {
+		if (val == intel_dp->force_audio)
+			return 0;
+
+		intel_dp->force_audio = val;
+
+		if (val > 0 && intel_dp->has_audio)
+			return 0;
+		if (val < 0 && !intel_dp->has_audio)
+			return 0;
+
+		intel_dp->has_audio = val > 0;
+		goto done;
+	}
+
+	return -EINVAL;
+
+done:
+	if (intel_dp->base.base.crtc) {
+		struct drm_crtc *crtc = intel_dp->base.base.crtc;
+		drm_crtc_helper_set_mode(crtc, &crtc->mode,
+					 crtc->x, crtc->y,
+					 crtc->fb);
+	}
+
+	return 0;
+}
+
 static void
 intel_dp_destroy (struct drm_connector *connector)
 {
@@ -1561,6 +1665,7 @@ static const struct drm_connector_funcs intel_dp_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.detect = intel_dp_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
+	.set_property = intel_dp_set_property,
 	.destroy = intel_dp_destroy,
 };
 
@@ -1625,6 +1730,20 @@ bool intel_dpd_is_edp(struct drm_device *dev)
 	return false;
 }
 
+static void
+intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+
+	intel_dp->force_audio_property =
+		drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
+	if (intel_dp->force_audio_property) {
+		intel_dp->force_audio_property->values[0] = -1;
+		intel_dp->force_audio_property->values[1] = 1;
+		drm_connector_attach_property(connector, intel_dp->force_audio_property, 0);
+	}
+}
+
 void
 intel_dp_init(struct drm_device *dev, int output_reg)
 {
@@ -1651,7 +1770,7 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 		if (intel_dpd_is_edp(dev))
 			intel_dp->is_pch_edp = true;
 
-	if (output_reg == DP_A || IS_PCH_eDP(intel_dp)) {
+	if (output_reg == DP_A || is_pch_edp(intel_dp)) {
 		type = DRM_MODE_CONNECTOR_eDP;
 		intel_encoder->type = INTEL_OUTPUT_EDP;
 	} else {
@@ -1672,7 +1791,7 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 	else if (output_reg == DP_D || output_reg == PCH_DP_D)
 		intel_encoder->clone_mask = (1 << INTEL_DP_D_CLONE_BIT);
 
-	if (IS_eDP(intel_dp))
+	if (is_edp(intel_dp))
 		intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT);
 
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
@@ -1717,9 +1836,29 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 
 	intel_dp_i2c_init(intel_dp, intel_connector, name);
 
+	/* Cache some DPCD data in the eDP case */
+	if (is_edp(intel_dp)) {
+		int ret;
+		bool was_on;
+
+		was_on = ironlake_edp_panel_on(intel_dp);
+		ret = intel_dp_aux_native_read(intel_dp, DP_DPCD_REV,
+					       intel_dp->dpcd,
+					       sizeof(intel_dp->dpcd));
+		if (ret == sizeof(intel_dp->dpcd)) {
+			if (intel_dp->dpcd[0] >= 0x11)
+				dev_priv->no_aux_handshake = intel_dp->dpcd[3] &
+					DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
+		} else {
+			DRM_ERROR("failed to retrieve link info\n");
+		}
+		if (!was_on)
+			ironlake_edp_panel_off(dev);
+	}
+
 	intel_encoder->hot_plug = intel_dp_hot_plug;
 
-	if (output_reg == DP_A || IS_PCH_eDP(intel_dp)) {
+	if (is_edp(intel_dp)) {
 		/* initialize panel mode from VBT if available for eDP */
 		if (dev_priv->lfp_lvds_vbt_mode) {
 			dev_priv->panel_fixed_mode =
@@ -1731,6 +1870,8 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 		}
 	}
 
+	intel_dp_add_properties(intel_dp, connector);
+
 	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 	 * 0xd.  Failure to do so will result in spurious interrupts being
 	 * generated on the port when a cable is not attached.