diff mbox

[1/3] drm/i915: Introduce i9xx_set_pipeconf()

Message ID 1364908210-13748-2-git-send-email-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ville Syrjälä April 2, 2013, 1:10 p.m. UTC
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Extract the PIPECONF setup into i9xx_set_pipeconf(). This makes the
<=Gen4/VLV code follow the same pattern as the Gen5+ codepaths.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 123 +++++++++++++++++++----------------
 1 file changed, 68 insertions(+), 55 deletions(-)

Comments

Jani Nikula April 3, 2013, 10:08 a.m. UTC | #1
On Tue, 02 Apr 2013, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Extract the PIPECONF setup into i9xx_set_pipeconf(). This makes the
> <=Gen4/VLV code follow the same pattern as the Gen5+ codepaths.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 123 +++++++++++++++++++----------------
>  1 file changed, 68 insertions(+), 55 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 298bc0c..dfaea15 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4514,6 +4514,71 @@ static void intel_set_pipe_timings(struct intel_crtc *intel_crtc,
>  		   ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
>  }
>  
> +static void i9xx_set_pipeconf(struct drm_crtc *crtc,
> +			      const struct drm_display_mode *mode,
> +			      const struct drm_display_mode *adjusted_mode,
> +			      bool is_dp)
> +{
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +	int pipe = intel_crtc->pipe;
> +	u32 pipeconf;
> +
> +	/* setup pipeconf */
> +	pipeconf = I915_READ(PIPECONF(pipe));
> +
> +	if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
> +		/* Enable pixel doubling when the dot clock is > 90% of the (display)
> +		 * core speed.
> +		 *
> +		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
> +		 * pipe == 0 check?
> +		 */
> +		if (mode->clock >
> +		    dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
> +			pipeconf |= PIPECONF_DOUBLE_WIDE;
> +		else
> +			pipeconf &= ~PIPECONF_DOUBLE_WIDE;
> +	}
> +
> +	/* default to 8bpc */
> +	pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
> +	if (is_dp && intel_crtc->config.dither) {
> +		pipeconf |= PIPECONF_6BPC |
> +			PIPECONF_DITHER_EN |
> +			PIPECONF_DITHER_TYPE_SP;
> +	}
> +
> +	if (IS_VALLEYVIEW(dev) &&
> +	    intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP) &&
> +	    intel_crtc->config.dither) {
> +		pipeconf |= PIPECONF_6BPC |
> +			PIPECONF_ENABLE |
> +			I965_PIPECONF_ACTIVE;
> +	}
> +
> +	if (HAS_PIPE_CXSR(dev)) {
> +		if (intel_crtc->lowfreq_avail) {
> +			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
> +			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
> +		} else {
> +			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
> +			pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
> +		}
> +	}
> +
> +	pipeconf &= ~PIPECONF_INTERLACE_MASK;
> +	if (!IS_GEN2(dev) &&
> +	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
> +		pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
> +	else
> +		pipeconf |= PIPECONF_PROGRESSIVE;
> +
> +	I915_WRITE(PIPECONF(pipe), pipeconf);
> +	POSTING_READ(PIPECONF(pipe));
> +}
> +
>  static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
>  			      int x, int y,
>  			      struct drm_framebuffer *fb)
> @@ -4528,7 +4593,7 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
>  	int plane = intel_crtc->plane;
>  	int refclk, num_connectors = 0;
>  	intel_clock_t clock, reduced_clock;
> -	u32 dspcntr, pipeconf;
> +	u32 dspcntr;
>  	bool ok, has_reduced_clock = false, is_sdvo = false;
>  	bool is_lvds = false, is_tv = false, is_dp = false;
>  	struct intel_encoder *encoder;
> @@ -4605,9 +4670,6 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
>  				has_reduced_clock ? &reduced_clock : NULL,
>  				num_connectors);
>  
> -	/* setup pipeconf */
> -	pipeconf = I915_READ(PIPECONF(pipe));
> -
>  	/* Set up the display plane register */
>  	dspcntr = DISPPLANE_GAMMA_ENABLE;
>  
> @@ -4618,58 +4680,9 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
>  			dspcntr |= DISPPLANE_SEL_PIPE_B;
>  	}
>  
> -	if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
> -		/* Enable pixel doubling when the dot clock is > 90% of the (display)
> -		 * core speed.
> -		 *
> -		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
> -		 * pipe == 0 check?
> -		 */
> -		if (mode->clock >
> -		    dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
> -			pipeconf |= PIPECONF_DOUBLE_WIDE;
> -		else
> -			pipeconf &= ~PIPECONF_DOUBLE_WIDE;
> -	}
> -
> -	/* default to 8bpc */
> -	pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
> -	if (is_dp) {
> -		if (intel_crtc->config.dither) {
> -			pipeconf |= PIPECONF_6BPC |
> -				    PIPECONF_DITHER_EN |
> -				    PIPECONF_DITHER_TYPE_SP;
> -		}
> -	}
> -
> -	if (IS_VALLEYVIEW(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
> -		if (intel_crtc->config.dither) {
> -			pipeconf |= PIPECONF_6BPC |
> -					PIPECONF_ENABLE |
> -					I965_PIPECONF_ACTIVE;
> -		}
> -	}
> -
>  	DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
>  	drm_mode_debug_printmodeline(mode);
>  
> -	if (HAS_PIPE_CXSR(dev)) {
> -		if (intel_crtc->lowfreq_avail) {
> -			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
> -			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
> -		} else {
> -			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
> -			pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
> -		}
> -	}
> -
> -	pipeconf &= ~PIPECONF_INTERLACE_MASK;
> -	if (!IS_GEN2(dev) &&
> -	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
> -		pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
> -	else
> -		pipeconf |= PIPECONF_PROGRESSIVE;
> -
>  	intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
>  
>  	/* pipesrc and dspsize control the size that is scaled from,
> @@ -4680,8 +4693,8 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
>  		   (mode->hdisplay - 1));
>  	I915_WRITE(DSPPOS(plane), 0);
>  
> -	I915_WRITE(PIPECONF(pipe), pipeconf);
> -	POSTING_READ(PIPECONF(pipe));
> +	i9xx_set_pipeconf(crtc, mode, adjusted_mode, is_dp);
> +
>  	intel_enable_pipe(dev_priv, pipe, false);
>  
>  	intel_wait_for_vblank(dev, pipe);
> -- 
> 1.8.1.5
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Daniel Vetter April 3, 2013, 5:06 p.m. UTC | #2
On Wed, Apr 03, 2013 at 01:08:16PM +0300, Jani Nikula wrote:
> On Tue, 02 Apr 2013, ville.syrjala@linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> >
> > Extract the PIPECONF setup into i9xx_set_pipeconf(). This makes the
> > <=Gen4/VLV code follow the same pattern as the Gen5+ codepaths.
> 
> Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Queued for -next with a pretty massive bikeshed (extended conflict
resolutions ftw), thanks for the patch.
-Daniel

> 
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_display.c | 123 +++++++++++++++++++----------------
> >  1 file changed, 68 insertions(+), 55 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index 298bc0c..dfaea15 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -4514,6 +4514,71 @@ static void intel_set_pipe_timings(struct intel_crtc *intel_crtc,
> >  		   ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
> >  }
> >  
> > +static void i9xx_set_pipeconf(struct drm_crtc *crtc,
> > +			      const struct drm_display_mode *mode,
> > +			      const struct drm_display_mode *adjusted_mode,
> > +			      bool is_dp)
> > +{
> > +	struct drm_device *dev = crtc->dev;
> > +	struct drm_i915_private *dev_priv = dev->dev_private;
> > +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> > +	int pipe = intel_crtc->pipe;
> > +	u32 pipeconf;
> > +
> > +	/* setup pipeconf */
> > +	pipeconf = I915_READ(PIPECONF(pipe));
> > +
> > +	if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
> > +		/* Enable pixel doubling when the dot clock is > 90% of the (display)
> > +		 * core speed.
> > +		 *
> > +		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
> > +		 * pipe == 0 check?
> > +		 */
> > +		if (mode->clock >
> > +		    dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
> > +			pipeconf |= PIPECONF_DOUBLE_WIDE;
> > +		else
> > +			pipeconf &= ~PIPECONF_DOUBLE_WIDE;
> > +	}
> > +
> > +	/* default to 8bpc */
> > +	pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
> > +	if (is_dp && intel_crtc->config.dither) {
> > +		pipeconf |= PIPECONF_6BPC |
> > +			PIPECONF_DITHER_EN |
> > +			PIPECONF_DITHER_TYPE_SP;
> > +	}
> > +
> > +	if (IS_VALLEYVIEW(dev) &&
> > +	    intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP) &&
> > +	    intel_crtc->config.dither) {
> > +		pipeconf |= PIPECONF_6BPC |
> > +			PIPECONF_ENABLE |
> > +			I965_PIPECONF_ACTIVE;
> > +	}
> > +
> > +	if (HAS_PIPE_CXSR(dev)) {
> > +		if (intel_crtc->lowfreq_avail) {
> > +			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
> > +			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
> > +		} else {
> > +			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
> > +			pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
> > +		}
> > +	}
> > +
> > +	pipeconf &= ~PIPECONF_INTERLACE_MASK;
> > +	if (!IS_GEN2(dev) &&
> > +	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
> > +		pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
> > +	else
> > +		pipeconf |= PIPECONF_PROGRESSIVE;
> > +
> > +	I915_WRITE(PIPECONF(pipe), pipeconf);
> > +	POSTING_READ(PIPECONF(pipe));
> > +}
> > +
> >  static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
> >  			      int x, int y,
> >  			      struct drm_framebuffer *fb)
> > @@ -4528,7 +4593,7 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
> >  	int plane = intel_crtc->plane;
> >  	int refclk, num_connectors = 0;
> >  	intel_clock_t clock, reduced_clock;
> > -	u32 dspcntr, pipeconf;
> > +	u32 dspcntr;
> >  	bool ok, has_reduced_clock = false, is_sdvo = false;
> >  	bool is_lvds = false, is_tv = false, is_dp = false;
> >  	struct intel_encoder *encoder;
> > @@ -4605,9 +4670,6 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
> >  				has_reduced_clock ? &reduced_clock : NULL,
> >  				num_connectors);
> >  
> > -	/* setup pipeconf */
> > -	pipeconf = I915_READ(PIPECONF(pipe));
> > -
> >  	/* Set up the display plane register */
> >  	dspcntr = DISPPLANE_GAMMA_ENABLE;
> >  
> > @@ -4618,58 +4680,9 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
> >  			dspcntr |= DISPPLANE_SEL_PIPE_B;
> >  	}
> >  
> > -	if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
> > -		/* Enable pixel doubling when the dot clock is > 90% of the (display)
> > -		 * core speed.
> > -		 *
> > -		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
> > -		 * pipe == 0 check?
> > -		 */
> > -		if (mode->clock >
> > -		    dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
> > -			pipeconf |= PIPECONF_DOUBLE_WIDE;
> > -		else
> > -			pipeconf &= ~PIPECONF_DOUBLE_WIDE;
> > -	}
> > -
> > -	/* default to 8bpc */
> > -	pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
> > -	if (is_dp) {
> > -		if (intel_crtc->config.dither) {
> > -			pipeconf |= PIPECONF_6BPC |
> > -				    PIPECONF_DITHER_EN |
> > -				    PIPECONF_DITHER_TYPE_SP;
> > -		}
> > -	}
> > -
> > -	if (IS_VALLEYVIEW(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
> > -		if (intel_crtc->config.dither) {
> > -			pipeconf |= PIPECONF_6BPC |
> > -					PIPECONF_ENABLE |
> > -					I965_PIPECONF_ACTIVE;
> > -		}
> > -	}
> > -
> >  	DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
> >  	drm_mode_debug_printmodeline(mode);
> >  
> > -	if (HAS_PIPE_CXSR(dev)) {
> > -		if (intel_crtc->lowfreq_avail) {
> > -			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
> > -			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
> > -		} else {
> > -			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
> > -			pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
> > -		}
> > -	}
> > -
> > -	pipeconf &= ~PIPECONF_INTERLACE_MASK;
> > -	if (!IS_GEN2(dev) &&
> > -	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
> > -		pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
> > -	else
> > -		pipeconf |= PIPECONF_PROGRESSIVE;
> > -
> >  	intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
> >  
> >  	/* pipesrc and dspsize control the size that is scaled from,
> > @@ -4680,8 +4693,8 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
> >  		   (mode->hdisplay - 1));
> >  	I915_WRITE(DSPPOS(plane), 0);
> >  
> > -	I915_WRITE(PIPECONF(pipe), pipeconf);
> > -	POSTING_READ(PIPECONF(pipe));
> > +	i9xx_set_pipeconf(crtc, mode, adjusted_mode, is_dp);
> > +
> >  	intel_enable_pipe(dev_priv, pipe, false);
> >  
> >  	intel_wait_for_vblank(dev, pipe);
> > -- 
> > 1.8.1.5
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Daniel Vetter April 3, 2013, 9:15 p.m. UTC | #3
On Wed, Apr 03, 2013 at 07:06:01PM +0200, Daniel Vetter wrote:
> On Wed, Apr 03, 2013 at 01:08:16PM +0300, Jani Nikula wrote:
> > On Tue, 02 Apr 2013, ville.syrjala@linux.intel.com wrote:
> > > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > >
> > > Extract the PIPECONF setup into i9xx_set_pipeconf(). This makes the
> > > <=Gen4/VLV code follow the same pattern as the Gen5+ codepaths.
> > 
> > Reviewed-by: Jani Nikula <jani.nikula@intel.com>
> 
> Queued for -next with a pretty massive bikeshed (extended conflict
> resolutions ftw), thanks for the patch.

I've changed my mind after trying to rebase my current pipe_config stuff
on top of latest dinq - I've noticed that I've written this exact patch,
but in slightly different colors:

https://patchwork.kernel.org/patch/2173951/

The slightly different colors resulted in rebase hell in my pipe_config
branch, so I've ditched your patch here and exchanged it with mine -
rebasing your two patches on top was much easier ;-)

Cheers, Daniel
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 298bc0c..dfaea15 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4514,6 +4514,71 @@  static void intel_set_pipe_timings(struct intel_crtc *intel_crtc,
 		   ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
 }
 
+static void i9xx_set_pipeconf(struct drm_crtc *crtc,
+			      const struct drm_display_mode *mode,
+			      const struct drm_display_mode *adjusted_mode,
+			      bool is_dp)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	u32 pipeconf;
+
+	/* setup pipeconf */
+	pipeconf = I915_READ(PIPECONF(pipe));
+
+	if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
+		/* Enable pixel doubling when the dot clock is > 90% of the (display)
+		 * core speed.
+		 *
+		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
+		 * pipe == 0 check?
+		 */
+		if (mode->clock >
+		    dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
+			pipeconf |= PIPECONF_DOUBLE_WIDE;
+		else
+			pipeconf &= ~PIPECONF_DOUBLE_WIDE;
+	}
+
+	/* default to 8bpc */
+	pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
+	if (is_dp && intel_crtc->config.dither) {
+		pipeconf |= PIPECONF_6BPC |
+			PIPECONF_DITHER_EN |
+			PIPECONF_DITHER_TYPE_SP;
+	}
+
+	if (IS_VALLEYVIEW(dev) &&
+	    intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP) &&
+	    intel_crtc->config.dither) {
+		pipeconf |= PIPECONF_6BPC |
+			PIPECONF_ENABLE |
+			I965_PIPECONF_ACTIVE;
+	}
+
+	if (HAS_PIPE_CXSR(dev)) {
+		if (intel_crtc->lowfreq_avail) {
+			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
+			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
+		} else {
+			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
+			pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
+		}
+	}
+
+	pipeconf &= ~PIPECONF_INTERLACE_MASK;
+	if (!IS_GEN2(dev) &&
+	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
+		pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
+	else
+		pipeconf |= PIPECONF_PROGRESSIVE;
+
+	I915_WRITE(PIPECONF(pipe), pipeconf);
+	POSTING_READ(PIPECONF(pipe));
+}
+
 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 			      int x, int y,
 			      struct drm_framebuffer *fb)
@@ -4528,7 +4593,7 @@  static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 	int plane = intel_crtc->plane;
 	int refclk, num_connectors = 0;
 	intel_clock_t clock, reduced_clock;
-	u32 dspcntr, pipeconf;
+	u32 dspcntr;
 	bool ok, has_reduced_clock = false, is_sdvo = false;
 	bool is_lvds = false, is_tv = false, is_dp = false;
 	struct intel_encoder *encoder;
@@ -4605,9 +4670,6 @@  static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 				has_reduced_clock ? &reduced_clock : NULL,
 				num_connectors);
 
-	/* setup pipeconf */
-	pipeconf = I915_READ(PIPECONF(pipe));
-
 	/* Set up the display plane register */
 	dspcntr = DISPPLANE_GAMMA_ENABLE;
 
@@ -4618,58 +4680,9 @@  static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 			dspcntr |= DISPPLANE_SEL_PIPE_B;
 	}
 
-	if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
-		/* Enable pixel doubling when the dot clock is > 90% of the (display)
-		 * core speed.
-		 *
-		 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
-		 * pipe == 0 check?
-		 */
-		if (mode->clock >
-		    dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
-			pipeconf |= PIPECONF_DOUBLE_WIDE;
-		else
-			pipeconf &= ~PIPECONF_DOUBLE_WIDE;
-	}
-
-	/* default to 8bpc */
-	pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
-	if (is_dp) {
-		if (intel_crtc->config.dither) {
-			pipeconf |= PIPECONF_6BPC |
-				    PIPECONF_DITHER_EN |
-				    PIPECONF_DITHER_TYPE_SP;
-		}
-	}
-
-	if (IS_VALLEYVIEW(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
-		if (intel_crtc->config.dither) {
-			pipeconf |= PIPECONF_6BPC |
-					PIPECONF_ENABLE |
-					I965_PIPECONF_ACTIVE;
-		}
-	}
-
 	DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
 	drm_mode_debug_printmodeline(mode);
 
-	if (HAS_PIPE_CXSR(dev)) {
-		if (intel_crtc->lowfreq_avail) {
-			DRM_DEBUG_KMS("enabling CxSR downclocking\n");
-			pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
-		} else {
-			DRM_DEBUG_KMS("disabling CxSR downclocking\n");
-			pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
-		}
-	}
-
-	pipeconf &= ~PIPECONF_INTERLACE_MASK;
-	if (!IS_GEN2(dev) &&
-	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
-		pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
-	else
-		pipeconf |= PIPECONF_PROGRESSIVE;
-
 	intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
 
 	/* pipesrc and dspsize control the size that is scaled from,
@@ -4680,8 +4693,8 @@  static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
 		   (mode->hdisplay - 1));
 	I915_WRITE(DSPPOS(plane), 0);
 
-	I915_WRITE(PIPECONF(pipe), pipeconf);
-	POSTING_READ(PIPECONF(pipe));
+	i9xx_set_pipeconf(crtc, mode, adjusted_mode, is_dp);
+
 	intel_enable_pipe(dev_priv, pipe, false);
 
 	intel_wait_for_vblank(dev, pipe);