diff mbox

[5/6] drm/i915: Unduplicate CHV pre-encoder enabling phy logic

Message ID 1460129506-6293-6-git-send-email-ander.conselvan.de.oliveira@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ander Conselvan de Oliveira April 8, 2016, 3:31 p.m. UTC
The only difference between the DP and HDMI versions was the lane count.
Since lane_count is now set appropriately for HDMI too, get rid of the
duplication and move this to intel_dpio_phy.c

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h       |  2 +
 drivers/gpu/drm/i915/intel_dp.c       | 84 +------------------------------
 drivers/gpu/drm/i915/intel_dpio_phy.c | 93 +++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_hdmi.c     | 69 +-------------------------
 4 files changed, 99 insertions(+), 149 deletions(-)

Comments

Ville Syrjala April 11, 2016, 3:13 p.m. UTC | #1
On Fri, Apr 08, 2016 at 06:31:45PM +0300, Ander Conselvan de Oliveira wrote:
> The only difference between the DP and HDMI versions was the lane count.
> Since lane_count is now set appropriately for HDMI too, get rid of the
> duplication and move this to intel_dpio_phy.c
> 
> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h       |  2 +
>  drivers/gpu/drm/i915/intel_dp.c       | 84 +------------------------------
>  drivers/gpu/drm/i915/intel_dpio_phy.c | 93 +++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_hdmi.c     | 69 +-------------------------
>  4 files changed, 99 insertions(+), 149 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 7b2f453..e1b2f48 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -3511,6 +3511,8 @@ void chv_set_phy_signal_level(struct intel_encoder *encoder,
>  void chv_data_lane_soft_reset(struct intel_encoder *encoder,
>  			      bool reset);
>  void chv_phy_pre_pll_enable(struct intel_encoder *encoder);
> +void chv_phy_pre_encoder_enable(struct intel_encoder *encoder);
> +void chv_phy_release_cl2_override(struct intel_encoder *encoder);
>  
>  int intel_gpu_freq(struct drm_i915_private *dev_priv, int val);
>  int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index fb0c9c5..8735738 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2851,91 +2851,11 @@ static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
>  
>  static void chv_pre_enable_dp(struct intel_encoder *encoder)
>  {
> -	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
> -	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
> -	struct drm_device *dev = encoder->base.dev;
> -	struct drm_i915_private *dev_priv = dev->dev_private;
> -	struct intel_crtc *intel_crtc =
> -		to_intel_crtc(encoder->base.crtc);
> -	enum dpio_channel ch = vlv_dport_to_channel(dport);
> -	int pipe = intel_crtc->pipe;
> -	int data, i, stagger;
> -	u32 val;
> -
> -	mutex_lock(&dev_priv->sb_lock);
> -
> -	/* allow hardware to manage TX FIFO reset source */
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
> -	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
> -
> -	if (intel_crtc->config->lane_count > 2) {
> -		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
> -		val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
> -		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
> -	}
> -
> -	/* Program Tx lane latency optimal setting*/
> -	for (i = 0; i < intel_crtc->config->lane_count; i++) {
> -		/* Set the upar bit */
> -		if (intel_crtc->config->lane_count == 1)
> -			data = 0x0;
> -		else
> -			data = (i == 1) ? 0x0 : 0x1;
> -		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
> -				data << DPIO_UPAR_SHIFT);
> -	}
> -
> -	/* Data lane stagger programming */
> -	if (intel_crtc->config->port_clock > 270000)
> -		stagger = 0x18;
> -	else if (intel_crtc->config->port_clock > 135000)
> -		stagger = 0xd;
> -	else if (intel_crtc->config->port_clock > 67500)
> -		stagger = 0x7;
> -	else if (intel_crtc->config->port_clock > 33750)
> -		stagger = 0x4;
> -	else
> -		stagger = 0x2;
> -
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
> -	val |= DPIO_TX2_STAGGER_MASK(0x1f);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
> -
> -	if (intel_crtc->config->lane_count > 2) {
> -		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
> -		val |= DPIO_TX2_STAGGER_MASK(0x1f);
> -		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
> -	}
> -
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
> -		       DPIO_LANESTAGGER_STRAP(stagger) |
> -		       DPIO_LANESTAGGER_STRAP_OVRD |
> -		       DPIO_TX1_STAGGER_MASK(0x1f) |
> -		       DPIO_TX1_STAGGER_MULT(6) |
> -		       DPIO_TX2_STAGGER_MULT(0));
> -
> -	if (intel_crtc->config->lane_count > 2) {
> -		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
> -			       DPIO_LANESTAGGER_STRAP(stagger) |
> -			       DPIO_LANESTAGGER_STRAP_OVRD |
> -			       DPIO_TX1_STAGGER_MASK(0x1f) |
> -			       DPIO_TX1_STAGGER_MULT(7) |
> -			       DPIO_TX2_STAGGER_MULT(5));
> -	}
> -
> -	/* Deassert data lane reset */
> -	chv_data_lane_soft_reset(encoder, false);
> -
> -	mutex_unlock(&dev_priv->sb_lock);
> +	chv_phy_pre_encoder_enable(encoder);
>  
>  	intel_enable_dp(encoder);
>  
> -	/* Second common lane will stay alive on its own now */

These comments would be better left in the caller.

> -	if (dport->release_cl2_override) {
> -		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
> -		dport->release_cl2_override = false;
> -	}
> +	chv_phy_release_cl2_override(encoder);
>  }
>  
>  static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
> diff --git a/drivers/gpu/drm/i915/intel_dpio_phy.c b/drivers/gpu/drm/i915/intel_dpio_phy.c
> index b4ca3ff..6078e74 100644
> --- a/drivers/gpu/drm/i915/intel_dpio_phy.c
> +++ b/drivers/gpu/drm/i915/intel_dpio_phy.c
> @@ -244,3 +244,96 @@ void chv_phy_pre_pll_enable(struct intel_encoder *encoder)
>  
>  	mutex_unlock(&dev_priv->sb_lock);
>  }
> +
> +void chv_phy_pre_encoder_enable(struct intel_encoder *encoder)
> +{
> +	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
> +	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
> +	struct drm_device *dev = encoder->base.dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +	struct intel_crtc *intel_crtc =
> +		to_intel_crtc(encoder->base.crtc);
> +	enum dpio_channel ch = vlv_dport_to_channel(dport);
> +	int pipe = intel_crtc->pipe;
> +	int data, i, stagger;
> +	u32 val;
> +
> +	mutex_lock(&dev_priv->sb_lock);
> +
> +	/* allow hardware to manage TX FIFO reset source */
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
> +	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
> +
> +	if (intel_crtc->config->lane_count > 2) {
> +		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
> +		val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
> +		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
> +	}
> +
> +	/* Program Tx lane latency optimal setting*/
> +	for (i = 0; i < intel_crtc->config->lane_count; i++) {
> +		/* Set the upar bit */
> +		if (intel_crtc->config->lane_count == 1)
> +			data = 0x0;
> +		else
> +			data = (i == 1) ? 0x0 : 0x1;
> +		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
> +				data << DPIO_UPAR_SHIFT);
> +	}
> +
> +	/* Data lane stagger programming */
> +	if (intel_crtc->config->port_clock > 270000)
> +		stagger = 0x18;
> +	else if (intel_crtc->config->port_clock > 135000)
> +		stagger = 0xd;
> +	else if (intel_crtc->config->port_clock > 67500)
> +		stagger = 0x7;
> +	else if (intel_crtc->config->port_clock > 33750)
> +		stagger = 0x4;
> +	else
> +		stagger = 0x2;
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
> +	val |= DPIO_TX2_STAGGER_MASK(0x1f);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
> +
> +	if (intel_crtc->config->lane_count > 2) {
> +		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
> +		val |= DPIO_TX2_STAGGER_MASK(0x1f);
> +		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
> +	}
> +
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
> +		       DPIO_LANESTAGGER_STRAP(stagger) |
> +		       DPIO_LANESTAGGER_STRAP_OVRD |
> +		       DPIO_TX1_STAGGER_MASK(0x1f) |
> +		       DPIO_TX1_STAGGER_MULT(6) |
> +		       DPIO_TX2_STAGGER_MULT(0));
> +
> +	if (intel_crtc->config->lane_count > 2) {
> +		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
> +			       DPIO_LANESTAGGER_STRAP(stagger) |
> +			       DPIO_LANESTAGGER_STRAP_OVRD |
> +			       DPIO_TX1_STAGGER_MASK(0x1f) |
> +			       DPIO_TX1_STAGGER_MULT(7) |
> +			       DPIO_TX2_STAGGER_MULT(5));
> +	}
> +
> +	/* Deassert data lane reset */
> +	chv_data_lane_soft_reset(encoder, false);
> +
> +	mutex_unlock(&dev_priv->sb_lock);
> +}
> +
> +void chv_phy_release_cl2_override(struct intel_encoder *encoder)
> +{
> +	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> +
> +	/* Second common lane will stay alive on its own now */
> +	if (dport->release_cl2_override) {
> +		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
> +		dport->release_cl2_override = false;
> +	}
> +}
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 4501906..1eb6667 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1734,69 +1734,8 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
>  	struct intel_crtc *intel_crtc =
>  		to_intel_crtc(encoder->base.crtc);
>  	const struct drm_display_mode *adjusted_mode = &intel_crtc->config->base.adjusted_mode;
> -	enum dpio_channel ch = vlv_dport_to_channel(dport);
> -	int pipe = intel_crtc->pipe;
> -	int data, i, stagger;
> -	u32 val;
> -
> -	mutex_lock(&dev_priv->sb_lock);
> -
> -	/* allow hardware to manage TX FIFO reset source */
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
> -	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
> -
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
> -	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
> -
> -	/* Program Tx latency optimal setting */
> -	for (i = 0; i < 4; i++) {
> -		/* Set the upar bit */
> -		data = (i == 1) ? 0x0 : 0x1;
> -		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
> -				data << DPIO_UPAR_SHIFT);
> -	}
> -
> -	/* Data lane stagger programming */
> -	if (intel_crtc->config->port_clock > 270000)
> -		stagger = 0x18;
> -	else if (intel_crtc->config->port_clock > 135000)
> -		stagger = 0xd;
> -	else if (intel_crtc->config->port_clock > 67500)
> -		stagger = 0x7;
> -	else if (intel_crtc->config->port_clock > 33750)
> -		stagger = 0x4;
> -	else
> -		stagger = 0x2;
> -
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
> -	val |= DPIO_TX2_STAGGER_MASK(0x1f);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
> -
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
> -	val |= DPIO_TX2_STAGGER_MASK(0x1f);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
> -
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
> -		       DPIO_LANESTAGGER_STRAP(stagger) |
> -		       DPIO_LANESTAGGER_STRAP_OVRD |
> -		       DPIO_TX1_STAGGER_MASK(0x1f) |
> -		       DPIO_TX1_STAGGER_MULT(6) |
> -		       DPIO_TX2_STAGGER_MULT(0));
> -
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
> -		       DPIO_LANESTAGGER_STRAP(stagger) |
> -		       DPIO_LANESTAGGER_STRAP_OVRD |
> -		       DPIO_TX1_STAGGER_MASK(0x1f) |
> -		       DPIO_TX1_STAGGER_MULT(7) |
> -		       DPIO_TX2_STAGGER_MULT(5));
> -
> -	/* Deassert data lane reset */
> -	chv_data_lane_soft_reset(encoder, false);
> -
> -	mutex_unlock(&dev_priv->sb_lock);
>  
> +	chv_phy_pre_encoder_enable(encoder);
>  	chv_set_phy_signal_level(encoder, 128, 102, false);
>  
>  	intel_hdmi->set_infoframes(&encoder->base,
> @@ -1807,11 +1746,7 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
>  
>  	vlv_wait_port_ready(dev_priv, dport, 0x0);
>  
> -	/* Second common lane will stay alive on its own now */
> -	if (dport->release_cl2_override) {
> -		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
> -		dport->release_cl2_override = false;
> -	}
> +	chv_phy_release_cl2_override(encoder);
>  }
>  
>  static void intel_hdmi_destroy(struct drm_connector *connector)
> -- 
> 2.4.11
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7b2f453..e1b2f48 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3511,6 +3511,8 @@  void chv_set_phy_signal_level(struct intel_encoder *encoder,
 void chv_data_lane_soft_reset(struct intel_encoder *encoder,
 			      bool reset);
 void chv_phy_pre_pll_enable(struct intel_encoder *encoder);
+void chv_phy_pre_encoder_enable(struct intel_encoder *encoder);
+void chv_phy_release_cl2_override(struct intel_encoder *encoder);
 
 int intel_gpu_freq(struct drm_i915_private *dev_priv, int val);
 int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index fb0c9c5..8735738 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2851,91 +2851,11 @@  static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
 
 static void chv_pre_enable_dp(struct intel_encoder *encoder)
 {
-	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
-	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
-	struct drm_device *dev = encoder->base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_crtc *intel_crtc =
-		to_intel_crtc(encoder->base.crtc);
-	enum dpio_channel ch = vlv_dport_to_channel(dport);
-	int pipe = intel_crtc->pipe;
-	int data, i, stagger;
-	u32 val;
-
-	mutex_lock(&dev_priv->sb_lock);
-
-	/* allow hardware to manage TX FIFO reset source */
-	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
-	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
-
-	if (intel_crtc->config->lane_count > 2) {
-		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
-		val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
-		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
-	}
-
-	/* Program Tx lane latency optimal setting*/
-	for (i = 0; i < intel_crtc->config->lane_count; i++) {
-		/* Set the upar bit */
-		if (intel_crtc->config->lane_count == 1)
-			data = 0x0;
-		else
-			data = (i == 1) ? 0x0 : 0x1;
-		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
-				data << DPIO_UPAR_SHIFT);
-	}
-
-	/* Data lane stagger programming */
-	if (intel_crtc->config->port_clock > 270000)
-		stagger = 0x18;
-	else if (intel_crtc->config->port_clock > 135000)
-		stagger = 0xd;
-	else if (intel_crtc->config->port_clock > 67500)
-		stagger = 0x7;
-	else if (intel_crtc->config->port_clock > 33750)
-		stagger = 0x4;
-	else
-		stagger = 0x2;
-
-	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
-	val |= DPIO_TX2_STAGGER_MASK(0x1f);
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
-
-	if (intel_crtc->config->lane_count > 2) {
-		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
-		val |= DPIO_TX2_STAGGER_MASK(0x1f);
-		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
-	}
-
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
-		       DPIO_LANESTAGGER_STRAP(stagger) |
-		       DPIO_LANESTAGGER_STRAP_OVRD |
-		       DPIO_TX1_STAGGER_MASK(0x1f) |
-		       DPIO_TX1_STAGGER_MULT(6) |
-		       DPIO_TX2_STAGGER_MULT(0));
-
-	if (intel_crtc->config->lane_count > 2) {
-		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
-			       DPIO_LANESTAGGER_STRAP(stagger) |
-			       DPIO_LANESTAGGER_STRAP_OVRD |
-			       DPIO_TX1_STAGGER_MASK(0x1f) |
-			       DPIO_TX1_STAGGER_MULT(7) |
-			       DPIO_TX2_STAGGER_MULT(5));
-	}
-
-	/* Deassert data lane reset */
-	chv_data_lane_soft_reset(encoder, false);
-
-	mutex_unlock(&dev_priv->sb_lock);
+	chv_phy_pre_encoder_enable(encoder);
 
 	intel_enable_dp(encoder);
 
-	/* Second common lane will stay alive on its own now */
-	if (dport->release_cl2_override) {
-		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
-		dport->release_cl2_override = false;
-	}
+	chv_phy_release_cl2_override(encoder);
 }
 
 static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
diff --git a/drivers/gpu/drm/i915/intel_dpio_phy.c b/drivers/gpu/drm/i915/intel_dpio_phy.c
index b4ca3ff..6078e74 100644
--- a/drivers/gpu/drm/i915/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/intel_dpio_phy.c
@@ -244,3 +244,96 @@  void chv_phy_pre_pll_enable(struct intel_encoder *encoder)
 
 	mutex_unlock(&dev_priv->sb_lock);
 }
+
+void chv_phy_pre_encoder_enable(struct intel_encoder *encoder)
+{
+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc =
+		to_intel_crtc(encoder->base.crtc);
+	enum dpio_channel ch = vlv_dport_to_channel(dport);
+	int pipe = intel_crtc->pipe;
+	int data, i, stagger;
+	u32 val;
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	/* allow hardware to manage TX FIFO reset source */
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
+	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
+
+	if (intel_crtc->config->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
+		val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
+	}
+
+	/* Program Tx lane latency optimal setting*/
+	for (i = 0; i < intel_crtc->config->lane_count; i++) {
+		/* Set the upar bit */
+		if (intel_crtc->config->lane_count == 1)
+			data = 0x0;
+		else
+			data = (i == 1) ? 0x0 : 0x1;
+		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
+				data << DPIO_UPAR_SHIFT);
+	}
+
+	/* Data lane stagger programming */
+	if (intel_crtc->config->port_clock > 270000)
+		stagger = 0x18;
+	else if (intel_crtc->config->port_clock > 135000)
+		stagger = 0xd;
+	else if (intel_crtc->config->port_clock > 67500)
+		stagger = 0x7;
+	else if (intel_crtc->config->port_clock > 33750)
+		stagger = 0x4;
+	else
+		stagger = 0x2;
+
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
+	val |= DPIO_TX2_STAGGER_MASK(0x1f);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
+
+	if (intel_crtc->config->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
+		val |= DPIO_TX2_STAGGER_MASK(0x1f);
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
+	}
+
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
+		       DPIO_LANESTAGGER_STRAP(stagger) |
+		       DPIO_LANESTAGGER_STRAP_OVRD |
+		       DPIO_TX1_STAGGER_MASK(0x1f) |
+		       DPIO_TX1_STAGGER_MULT(6) |
+		       DPIO_TX2_STAGGER_MULT(0));
+
+	if (intel_crtc->config->lane_count > 2) {
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
+			       DPIO_LANESTAGGER_STRAP(stagger) |
+			       DPIO_LANESTAGGER_STRAP_OVRD |
+			       DPIO_TX1_STAGGER_MASK(0x1f) |
+			       DPIO_TX1_STAGGER_MULT(7) |
+			       DPIO_TX2_STAGGER_MULT(5));
+	}
+
+	/* Deassert data lane reset */
+	chv_data_lane_soft_reset(encoder, false);
+
+	mutex_unlock(&dev_priv->sb_lock);
+}
+
+void chv_phy_release_cl2_override(struct intel_encoder *encoder)
+{
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	/* Second common lane will stay alive on its own now */
+	if (dport->release_cl2_override) {
+		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
+		dport->release_cl2_override = false;
+	}
+}
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 4501906..1eb6667 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1734,69 +1734,8 @@  static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
 	struct intel_crtc *intel_crtc =
 		to_intel_crtc(encoder->base.crtc);
 	const struct drm_display_mode *adjusted_mode = &intel_crtc->config->base.adjusted_mode;
-	enum dpio_channel ch = vlv_dport_to_channel(dport);
-	int pipe = intel_crtc->pipe;
-	int data, i, stagger;
-	u32 val;
-
-	mutex_lock(&dev_priv->sb_lock);
-
-	/* allow hardware to manage TX FIFO reset source */
-	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
-	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
-
-	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
-	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
-
-	/* Program Tx latency optimal setting */
-	for (i = 0; i < 4; i++) {
-		/* Set the upar bit */
-		data = (i == 1) ? 0x0 : 0x1;
-		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
-				data << DPIO_UPAR_SHIFT);
-	}
-
-	/* Data lane stagger programming */
-	if (intel_crtc->config->port_clock > 270000)
-		stagger = 0x18;
-	else if (intel_crtc->config->port_clock > 135000)
-		stagger = 0xd;
-	else if (intel_crtc->config->port_clock > 67500)
-		stagger = 0x7;
-	else if (intel_crtc->config->port_clock > 33750)
-		stagger = 0x4;
-	else
-		stagger = 0x2;
-
-	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
-	val |= DPIO_TX2_STAGGER_MASK(0x1f);
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
-
-	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
-	val |= DPIO_TX2_STAGGER_MASK(0x1f);
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
-
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
-		       DPIO_LANESTAGGER_STRAP(stagger) |
-		       DPIO_LANESTAGGER_STRAP_OVRD |
-		       DPIO_TX1_STAGGER_MASK(0x1f) |
-		       DPIO_TX1_STAGGER_MULT(6) |
-		       DPIO_TX2_STAGGER_MULT(0));
-
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
-		       DPIO_LANESTAGGER_STRAP(stagger) |
-		       DPIO_LANESTAGGER_STRAP_OVRD |
-		       DPIO_TX1_STAGGER_MASK(0x1f) |
-		       DPIO_TX1_STAGGER_MULT(7) |
-		       DPIO_TX2_STAGGER_MULT(5));
-
-	/* Deassert data lane reset */
-	chv_data_lane_soft_reset(encoder, false);
-
-	mutex_unlock(&dev_priv->sb_lock);
 
+	chv_phy_pre_encoder_enable(encoder);
 	chv_set_phy_signal_level(encoder, 128, 102, false);
 
 	intel_hdmi->set_infoframes(&encoder->base,
@@ -1807,11 +1746,7 @@  static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
 
 	vlv_wait_port_ready(dev_priv, dport, 0x0);
 
-	/* Second common lane will stay alive on its own now */
-	if (dport->release_cl2_override) {
-		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
-		dport->release_cl2_override = false;
-	}
+	chv_phy_release_cl2_override(encoder);
 }
 
 static void intel_hdmi_destroy(struct drm_connector *connector)