diff mbox

[v2,03/10] drm/i915/gen9: Make skl_wm_level per-plane

Message ID 1475885497-6094-4-git-send-email-cpaul@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

cpaul@redhat.com Oct. 8, 2016, 12:11 a.m. UTC
Having skl_wm_level contain all of the watermarks for each plane is
annoying since it prevents us from having any sort of object to
represent a single watermark level, something we take advantage of in
the next commit to cut down on all of the copy paste code in here.

Changes since v1:
- Style nitpicks
- Fix accidental usage of i vs. PLANE_CURSOR
- Split out skl_pipe_wm_active_state simplification into separate patch

Signed-off-by: Lyude <cpaul@redhat.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h  |   6 +-
 drivers/gpu/drm/i915/intel_drv.h |   6 +-
 drivers/gpu/drm/i915/intel_pm.c  | 207 +++++++++++++++++++--------------------
 3 files changed, 111 insertions(+), 108 deletions(-)

Comments

Zanoni, Paulo R Oct. 11, 2016, 7:36 p.m. UTC | #1
Em Sex, 2016-10-07 às 20:11 -0400, Lyude escreveu:
> Having skl_wm_level contain all of the watermarks for each plane is
> annoying since it prevents us from having any sort of object to
> represent a single watermark level, something we take advantage of in
> the next commit to cut down on all of the copy paste code in here.
> 
> Changes since v1:
> - Style nitpicks
> - Fix accidental usage of i vs. PLANE_CURSOR
> - Split out skl_pipe_wm_active_state simplification into separate
> patch
> 
> Signed-off-by: Lyude <cpaul@redhat.com>

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h  |   6 +-
>  drivers/gpu/drm/i915/intel_drv.h |   6 +-
>  drivers/gpu/drm/i915/intel_pm.c  | 207 +++++++++++++++++++--------
> ------------
>  3 files changed, 111 insertions(+), 108 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h
> index e9d035ea..0287c93 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1649,9 +1649,9 @@ struct skl_wm_values {
>  };
>  
>  struct skl_wm_level {
> -	bool plane_en[I915_MAX_PLANES];
> -	uint16_t plane_res_b[I915_MAX_PLANES];
> -	uint8_t plane_res_l[I915_MAX_PLANES];
> +	bool plane_en;
> +	uint16_t plane_res_b;
> +	uint8_t plane_res_l;
>  };
>  
>  /*
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 35ba282..d684f4f 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -468,9 +468,13 @@ struct intel_pipe_wm {
>  	bool sprites_scaled;
>  };
>  
> -struct skl_pipe_wm {
> +struct skl_plane_wm {
>  	struct skl_wm_level wm[8];
>  	struct skl_wm_level trans_wm;
> +};
> +
> +struct skl_pipe_wm {
> +	struct skl_plane_wm planes[I915_MAX_PLANES];
>  	uint32_t linetime;
>  };
>  
> diff --git a/drivers/gpu/drm/i915/intel_pm.c
> b/drivers/gpu/drm/i915/intel_pm.c
> index cc5d5e9..4c2ebcd 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3670,67 +3670,52 @@ static int
>  skl_compute_wm_level(const struct drm_i915_private *dev_priv,
>  		     struct skl_ddb_allocation *ddb,
>  		     struct intel_crtc_state *cstate,
> +		     struct intel_plane *intel_plane,
>  		     int level,
>  		     struct skl_wm_level *result)
>  {
>  	struct drm_atomic_state *state = cstate->base.state;
>  	struct intel_crtc *intel_crtc = to_intel_crtc(cstate-
> >base.crtc);
> -	struct drm_plane *plane;
> -	struct intel_plane *intel_plane;
> -	struct intel_plane_state *intel_pstate;
> +	struct drm_plane *plane = &intel_plane->base;
> +	struct intel_plane_state *intel_pstate = NULL;
>  	uint16_t ddb_blocks;
>  	enum pipe pipe = intel_crtc->pipe;
>  	int ret;
> +	int i = skl_wm_plane_id(intel_plane);
> +
> +	if (state)
> +		intel_pstate =
> +			intel_atomic_get_existing_plane_state(state,
> +							      intel_
> plane);
>  
>  	/*
> -	 * We'll only calculate watermarks for planes that are
> actually
> -	 * enabled, so make sure all other planes are set as
> disabled.
> +	 * Note: If we start supporting multiple pending atomic
> commits against
> +	 * the same planes/CRTC's in the future, plane->state will
> no longer be
> +	 * the correct pre-state to use for the calculations here
> and we'll
> +	 * need to change where we get the 'unchanged' plane data
> from.
> +	 *
> +	 * For now this is fine because we only allow one queued
> commit against
> +	 * a CRTC.  Even if the plane isn't modified by this
> transaction and we
> +	 * don't have a plane lock, we still have the CRTC's lock,
> so we know
> +	 * that no other transactions are racing with us to update
> it.
>  	 */
> -	memset(result, 0, sizeof(*result));
> +	if (!intel_pstate)
> +		intel_pstate = to_intel_plane_state(plane->state);
>  
> -	for_each_intel_plane_mask(&dev_priv->drm,
> -				  intel_plane,
> -				  cstate->base.plane_mask) {
> -		int i = skl_wm_plane_id(intel_plane);
> -
> -		plane = &intel_plane->base;
> -		intel_pstate = NULL;
> -		if (state)
> -			intel_pstate =
> -				intel_atomic_get_existing_plane_stat
> e(state,
> -								    
>   intel_plane);
> +	WARN_ON(!intel_pstate->base.fb);
>  
> -		/*
> -		 * Note: If we start supporting multiple pending
> atomic commits
> -		 * against the same planes/CRTC's in the future,
> plane->state
> -		 * will no longer be the correct pre-state to use
> for the
> -		 * calculations here and we'll need to change where
> we get the
> -		 * 'unchanged' plane data from.
> -		 *
> -		 * For now this is fine because we only allow one
> queued commit
> -		 * against a CRTC.  Even if the plane isn't modified
> by this
> -		 * transaction and we don't have a plane lock, we
> still have
> -		 * the CRTC's lock, so we know that no other
> transactions are
> -		 * racing with us to update it.
> -		 */
> -		if (!intel_pstate)
> -			intel_pstate = to_intel_plane_state(plane-
> >state);
> +	ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][i]);
>  
> -		WARN_ON(!intel_pstate->base.fb);
> -
> -		ddb_blocks = skl_ddb_entry_size(&ddb-
> >plane[pipe][i]);
> -
> -		ret = skl_compute_plane_wm(dev_priv,
> -					   cstate,
> -					   intel_pstate,
> -					   ddb_blocks,
> -					   level,
> -					   &result->plane_res_b[i],
> -					   &result->plane_res_l[i],
> -					   &result->plane_en[i]);
> -		if (ret)
> -			return ret;
> -	}
> +	ret = skl_compute_plane_wm(dev_priv,
> +				   cstate,
> +				   intel_pstate,
> +				   ddb_blocks,
> +				   level,
> +				   &result->plane_res_b,
> +				   &result->plane_res_l,
> +				   &result->plane_en);
> +	if (ret)
> +		return ret;
>  
>  	return 0;
>  }
> @@ -3751,19 +3736,11 @@ skl_compute_linetime_wm(struct
> intel_crtc_state *cstate)
>  static void skl_compute_transition_wm(struct intel_crtc_state
> *cstate,
>  				      struct skl_wm_level *trans_wm
> /* out */)
>  {
> -	struct drm_crtc *crtc = cstate->base.crtc;
> -	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> -	struct intel_plane *intel_plane;
> -
>  	if (!cstate->base.active)
>  		return;
>  
>  	/* Until we know more, just disable transition WMs */
> -	for_each_intel_plane_on_crtc(crtc->dev, intel_crtc,
> intel_plane) {
> -		int i = skl_wm_plane_id(intel_plane);
> -
> -		trans_wm->plane_en[i] = false;
> -	}
> +	trans_wm->plane_en = false;
>  }
>  
>  static int skl_build_pipe_wm(struct intel_crtc_state *cstate,
> @@ -3772,19 +3749,33 @@ static int skl_build_pipe_wm(struct
> intel_crtc_state *cstate,
>  {
>  	struct drm_device *dev = cstate->base.crtc->dev;
>  	const struct drm_i915_private *dev_priv = to_i915(dev);
> +	struct intel_plane *intel_plane;
> +	struct skl_plane_wm *wm;
>  	int level, max_level = ilk_wm_max_level(dev);
>  	int ret;
>  
> -	for (level = 0; level <= max_level; level++) {
> -		ret = skl_compute_wm_level(dev_priv, ddb, cstate,
> -					   level, &pipe_wm-
> >wm[level]);
> -		if (ret)
> -			return ret;
> +	/*
> +	 * We'll only calculate watermarks for planes that are
> actually
> +	 * enabled, so make sure all other planes are set as
> disabled.
> +	 */
> +	memset(pipe_wm->planes, 0, sizeof(pipe_wm->planes));
> +
> +	for_each_intel_plane_mask(&dev_priv->drm,
> +				  intel_plane,
> +				  cstate->base.plane_mask) {
> +		wm = &pipe_wm->planes[skl_wm_plane_id(intel_plane)];
> +
> +		for (level = 0; level <= max_level; level++) {
> +			ret = skl_compute_wm_level(dev_priv, ddb,
> cstate,
> +						   intel_plane,
> level,
> +						   &wm->wm[level]);
> +			if (ret)
> +				return ret;
> +		}
> +		skl_compute_transition_wm(cstate, &wm->trans_wm);
>  	}
>  	pipe_wm->linetime = skl_compute_linetime_wm(cstate);
>  
> -	skl_compute_transition_wm(cstate, &pipe_wm->trans_wm);
> -
>  	return 0;
>  }
>  
> @@ -3794,50 +3785,56 @@ static void skl_compute_wm_results(struct
> drm_device *dev,
>  				   struct intel_crtc *intel_crtc)
>  {
>  	int level, max_level = ilk_wm_max_level(dev);
> +	struct skl_plane_wm *plane_wm;
>  	enum pipe pipe = intel_crtc->pipe;
>  	uint32_t temp;
>  	int i;
>  
> -	for (level = 0; level <= max_level; level++) {
> -		for (i = 0; i < intel_num_planes(intel_crtc); i++) {
> +	for (i = 0; i < intel_num_planes(intel_crtc); i++) {
> +		plane_wm = &p_wm->planes[i];
> +
> +		for (level = 0; level <= max_level; level++) {
>  			temp = 0;
>  
> -			temp |= p_wm->wm[level].plane_res_l[i] <<
> +			temp |= plane_wm->wm[level].plane_res_l <<
>  					PLANE_WM_LINES_SHIFT;
> -			temp |= p_wm->wm[level].plane_res_b[i];
> -			if (p_wm->wm[level].plane_en[i])
> +			temp |= plane_wm->wm[level].plane_res_b;
> +			if (plane_wm->wm[level].plane_en)
>  				temp |= PLANE_WM_EN;
>  
>  			r->plane[pipe][i][level] = temp;
>  		}
>  
> -		temp = 0;
> -
> -		temp |= p_wm->wm[level].plane_res_l[PLANE_CURSOR] <<
> PLANE_WM_LINES_SHIFT;
> -		temp |= p_wm->wm[level].plane_res_b[PLANE_CURSOR];
> +	}
>  
> -		if (p_wm->wm[level].plane_en[PLANE_CURSOR])
> +	for (level = 0; level <= max_level; level++) {
> +		plane_wm = &p_wm->planes[PLANE_CURSOR];
> +		temp = 0;
> +		temp |= plane_wm->wm[level].plane_res_l <<
> PLANE_WM_LINES_SHIFT;
> +		temp |= plane_wm->wm[level].plane_res_b;
> +		if (plane_wm->wm[level].plane_en)
>  			temp |= PLANE_WM_EN;
>  
>  		r->plane[pipe][PLANE_CURSOR][level] = temp;
> -
>  	}
>  
>  	/* transition WMs */
>  	for (i = 0; i < intel_num_planes(intel_crtc); i++) {
> +		plane_wm = &p_wm->planes[i];
>  		temp = 0;
> -		temp |= p_wm->trans_wm.plane_res_l[i] <<
> PLANE_WM_LINES_SHIFT;
> -		temp |= p_wm->trans_wm.plane_res_b[i];
> -		if (p_wm->trans_wm.plane_en[i])
> +		temp |= plane_wm->trans_wm.plane_res_l <<
> PLANE_WM_LINES_SHIFT;
> +		temp |= plane_wm->trans_wm.plane_res_b;
> +		if (plane_wm->trans_wm.plane_en)
>  			temp |= PLANE_WM_EN;
>  
>  		r->plane_trans[pipe][i] = temp;
>  	}
>  
> +	plane_wm = &p_wm->planes[PLANE_CURSOR];
>  	temp = 0;
> -	temp |= p_wm->trans_wm.plane_res_l[PLANE_CURSOR] <<
> PLANE_WM_LINES_SHIFT;
> -	temp |= p_wm->trans_wm.plane_res_b[PLANE_CURSOR];
> -	if (p_wm->trans_wm.plane_en[PLANE_CURSOR])
> +	temp |= plane_wm->trans_wm.plane_res_l <<
> PLANE_WM_LINES_SHIFT;
> +	temp |= plane_wm->trans_wm.plane_res_b;
> +	if (plane_wm->trans_wm.plane_en)
>  		temp |= PLANE_WM_EN;
>  
>  	r->plane_trans[pipe][PLANE_CURSOR] = temp;
> @@ -4278,35 +4275,37 @@ static void skl_pipe_wm_active_state(uint32_t
> val,
>  
>  	if (!is_transwm) {
>  		if (!is_cursor) {
> -			active->wm[level].plane_en[i] = is_enabled;
> -			active->wm[level].plane_res_b[i] =
> -					val & PLANE_WM_BLOCKS_MASK;
> -			active->wm[level].plane_res_l[i] =
> -					(val >>
> PLANE_WM_LINES_SHIFT) &
> -						PLANE_WM_LINES_MASK;
> +			active->planes[i].wm[level].plane_en =
> is_enabled;
> +			active->planes[i].wm[level].plane_res_b =
> +				val & PLANE_WM_BLOCKS_MASK;
> +			active->planes[i].wm[level].plane_res_l =
> +				(val >> PLANE_WM_LINES_SHIFT) &
> +				PLANE_WM_LINES_MASK;
>  		} else {
> -			active->wm[level].plane_en[PLANE_CURSOR] =
> is_enabled;
> -			active->wm[level].plane_res_b[PLANE_CURSOR]
> =
> -					val & PLANE_WM_BLOCKS_MASK;
> -			active->wm[level].plane_res_l[PLANE_CURSOR]
> =
> -					(val >>
> PLANE_WM_LINES_SHIFT) &
> -						PLANE_WM_LINES_MASK;
> +			active-
> >planes[PLANE_CURSOR].wm[level].plane_en =
> +				is_enabled;
> +			active-
> >planes[PLANE_CURSOR].wm[level].plane_res_b =
> +				val & PLANE_WM_BLOCKS_MASK;
> +			active-
> >planes[PLANE_CURSOR].wm[level].plane_res_l =
> +				(val >> PLANE_WM_LINES_SHIFT) &
> +				PLANE_WM_LINES_MASK;
>  		}
>  	} else {
>  		if (!is_cursor) {
> -			active->trans_wm.plane_en[i] = is_enabled;
> -			active->trans_wm.plane_res_b[i] =
> -					val & PLANE_WM_BLOCKS_MASK;
> -			active->trans_wm.plane_res_l[i] =
> -					(val >>
> PLANE_WM_LINES_SHIFT) &
> -						PLANE_WM_LINES_MASK;
> +			active->planes[i].trans_wm.plane_en =
> is_enabled;
> +			active->planes[i].trans_wm.plane_res_b =
> +				val & PLANE_WM_BLOCKS_MASK;
> +			active->planes[i].trans_wm.plane_res_l =
> +				(val >> PLANE_WM_LINES_SHIFT) &
> +				PLANE_WM_LINES_MASK;
>  		} else {
> -			active->trans_wm.plane_en[PLANE_CURSOR] =
> is_enabled;
> -			active->trans_wm.plane_res_b[PLANE_CURSOR] =
> -					val & PLANE_WM_BLOCKS_MASK;
> -			active->trans_wm.plane_res_l[PLANE_CURSOR] =
> -					(val >>
> PLANE_WM_LINES_SHIFT) &
> -						PLANE_WM_LINES_MASK;
> +			active-
> >planes[PLANE_CURSOR].trans_wm.plane_en =
> +				is_enabled;
> +			active-
> >planes[PLANE_CURSOR].trans_wm.plane_res_b =
> +				val & PLANE_WM_BLOCKS_MASK;
> +			active-
> >planes[PLANE_CURSOR].trans_wm.plane_res_l =
> +				(val >> PLANE_WM_LINES_SHIFT) &
> +				PLANE_WM_LINES_MASK;
>  		}
>  	}
>  }
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e9d035ea..0287c93 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1649,9 +1649,9 @@  struct skl_wm_values {
 };
 
 struct skl_wm_level {
-	bool plane_en[I915_MAX_PLANES];
-	uint16_t plane_res_b[I915_MAX_PLANES];
-	uint8_t plane_res_l[I915_MAX_PLANES];
+	bool plane_en;
+	uint16_t plane_res_b;
+	uint8_t plane_res_l;
 };
 
 /*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 35ba282..d684f4f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -468,9 +468,13 @@  struct intel_pipe_wm {
 	bool sprites_scaled;
 };
 
-struct skl_pipe_wm {
+struct skl_plane_wm {
 	struct skl_wm_level wm[8];
 	struct skl_wm_level trans_wm;
+};
+
+struct skl_pipe_wm {
+	struct skl_plane_wm planes[I915_MAX_PLANES];
 	uint32_t linetime;
 };
 
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index cc5d5e9..4c2ebcd 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3670,67 +3670,52 @@  static int
 skl_compute_wm_level(const struct drm_i915_private *dev_priv,
 		     struct skl_ddb_allocation *ddb,
 		     struct intel_crtc_state *cstate,
+		     struct intel_plane *intel_plane,
 		     int level,
 		     struct skl_wm_level *result)
 {
 	struct drm_atomic_state *state = cstate->base.state;
 	struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
-	struct drm_plane *plane;
-	struct intel_plane *intel_plane;
-	struct intel_plane_state *intel_pstate;
+	struct drm_plane *plane = &intel_plane->base;
+	struct intel_plane_state *intel_pstate = NULL;
 	uint16_t ddb_blocks;
 	enum pipe pipe = intel_crtc->pipe;
 	int ret;
+	int i = skl_wm_plane_id(intel_plane);
+
+	if (state)
+		intel_pstate =
+			intel_atomic_get_existing_plane_state(state,
+							      intel_plane);
 
 	/*
-	 * We'll only calculate watermarks for planes that are actually
-	 * enabled, so make sure all other planes are set as disabled.
+	 * Note: If we start supporting multiple pending atomic commits against
+	 * the same planes/CRTC's in the future, plane->state will no longer be
+	 * the correct pre-state to use for the calculations here and we'll
+	 * need to change where we get the 'unchanged' plane data from.
+	 *
+	 * For now this is fine because we only allow one queued commit against
+	 * a CRTC.  Even if the plane isn't modified by this transaction and we
+	 * don't have a plane lock, we still have the CRTC's lock, so we know
+	 * that no other transactions are racing with us to update it.
 	 */
-	memset(result, 0, sizeof(*result));
+	if (!intel_pstate)
+		intel_pstate = to_intel_plane_state(plane->state);
 
-	for_each_intel_plane_mask(&dev_priv->drm,
-				  intel_plane,
-				  cstate->base.plane_mask) {
-		int i = skl_wm_plane_id(intel_plane);
-
-		plane = &intel_plane->base;
-		intel_pstate = NULL;
-		if (state)
-			intel_pstate =
-				intel_atomic_get_existing_plane_state(state,
-								      intel_plane);
+	WARN_ON(!intel_pstate->base.fb);
 
-		/*
-		 * Note: If we start supporting multiple pending atomic commits
-		 * against the same planes/CRTC's in the future, plane->state
-		 * will no longer be the correct pre-state to use for the
-		 * calculations here and we'll need to change where we get the
-		 * 'unchanged' plane data from.
-		 *
-		 * For now this is fine because we only allow one queued commit
-		 * against a CRTC.  Even if the plane isn't modified by this
-		 * transaction and we don't have a plane lock, we still have
-		 * the CRTC's lock, so we know that no other transactions are
-		 * racing with us to update it.
-		 */
-		if (!intel_pstate)
-			intel_pstate = to_intel_plane_state(plane->state);
+	ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][i]);
 
-		WARN_ON(!intel_pstate->base.fb);
-
-		ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][i]);
-
-		ret = skl_compute_plane_wm(dev_priv,
-					   cstate,
-					   intel_pstate,
-					   ddb_blocks,
-					   level,
-					   &result->plane_res_b[i],
-					   &result->plane_res_l[i],
-					   &result->plane_en[i]);
-		if (ret)
-			return ret;
-	}
+	ret = skl_compute_plane_wm(dev_priv,
+				   cstate,
+				   intel_pstate,
+				   ddb_blocks,
+				   level,
+				   &result->plane_res_b,
+				   &result->plane_res_l,
+				   &result->plane_en);
+	if (ret)
+		return ret;
 
 	return 0;
 }
@@ -3751,19 +3736,11 @@  skl_compute_linetime_wm(struct intel_crtc_state *cstate)
 static void skl_compute_transition_wm(struct intel_crtc_state *cstate,
 				      struct skl_wm_level *trans_wm /* out */)
 {
-	struct drm_crtc *crtc = cstate->base.crtc;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	struct intel_plane *intel_plane;
-
 	if (!cstate->base.active)
 		return;
 
 	/* Until we know more, just disable transition WMs */
-	for_each_intel_plane_on_crtc(crtc->dev, intel_crtc, intel_plane) {
-		int i = skl_wm_plane_id(intel_plane);
-
-		trans_wm->plane_en[i] = false;
-	}
+	trans_wm->plane_en = false;
 }
 
 static int skl_build_pipe_wm(struct intel_crtc_state *cstate,
@@ -3772,19 +3749,33 @@  static int skl_build_pipe_wm(struct intel_crtc_state *cstate,
 {
 	struct drm_device *dev = cstate->base.crtc->dev;
 	const struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_plane *intel_plane;
+	struct skl_plane_wm *wm;
 	int level, max_level = ilk_wm_max_level(dev);
 	int ret;
 
-	for (level = 0; level <= max_level; level++) {
-		ret = skl_compute_wm_level(dev_priv, ddb, cstate,
-					   level, &pipe_wm->wm[level]);
-		if (ret)
-			return ret;
+	/*
+	 * We'll only calculate watermarks for planes that are actually
+	 * enabled, so make sure all other planes are set as disabled.
+	 */
+	memset(pipe_wm->planes, 0, sizeof(pipe_wm->planes));
+
+	for_each_intel_plane_mask(&dev_priv->drm,
+				  intel_plane,
+				  cstate->base.plane_mask) {
+		wm = &pipe_wm->planes[skl_wm_plane_id(intel_plane)];
+
+		for (level = 0; level <= max_level; level++) {
+			ret = skl_compute_wm_level(dev_priv, ddb, cstate,
+						   intel_plane, level,
+						   &wm->wm[level]);
+			if (ret)
+				return ret;
+		}
+		skl_compute_transition_wm(cstate, &wm->trans_wm);
 	}
 	pipe_wm->linetime = skl_compute_linetime_wm(cstate);
 
-	skl_compute_transition_wm(cstate, &pipe_wm->trans_wm);
-
 	return 0;
 }
 
@@ -3794,50 +3785,56 @@  static void skl_compute_wm_results(struct drm_device *dev,
 				   struct intel_crtc *intel_crtc)
 {
 	int level, max_level = ilk_wm_max_level(dev);
+	struct skl_plane_wm *plane_wm;
 	enum pipe pipe = intel_crtc->pipe;
 	uint32_t temp;
 	int i;
 
-	for (level = 0; level <= max_level; level++) {
-		for (i = 0; i < intel_num_planes(intel_crtc); i++) {
+	for (i = 0; i < intel_num_planes(intel_crtc); i++) {
+		plane_wm = &p_wm->planes[i];
+
+		for (level = 0; level <= max_level; level++) {
 			temp = 0;
 
-			temp |= p_wm->wm[level].plane_res_l[i] <<
+			temp |= plane_wm->wm[level].plane_res_l <<
 					PLANE_WM_LINES_SHIFT;
-			temp |= p_wm->wm[level].plane_res_b[i];
-			if (p_wm->wm[level].plane_en[i])
+			temp |= plane_wm->wm[level].plane_res_b;
+			if (plane_wm->wm[level].plane_en)
 				temp |= PLANE_WM_EN;
 
 			r->plane[pipe][i][level] = temp;
 		}
 
-		temp = 0;
-
-		temp |= p_wm->wm[level].plane_res_l[PLANE_CURSOR] << PLANE_WM_LINES_SHIFT;
-		temp |= p_wm->wm[level].plane_res_b[PLANE_CURSOR];
+	}
 
-		if (p_wm->wm[level].plane_en[PLANE_CURSOR])
+	for (level = 0; level <= max_level; level++) {
+		plane_wm = &p_wm->planes[PLANE_CURSOR];
+		temp = 0;
+		temp |= plane_wm->wm[level].plane_res_l << PLANE_WM_LINES_SHIFT;
+		temp |= plane_wm->wm[level].plane_res_b;
+		if (plane_wm->wm[level].plane_en)
 			temp |= PLANE_WM_EN;
 
 		r->plane[pipe][PLANE_CURSOR][level] = temp;
-
 	}
 
 	/* transition WMs */
 	for (i = 0; i < intel_num_planes(intel_crtc); i++) {
+		plane_wm = &p_wm->planes[i];
 		temp = 0;
-		temp |= p_wm->trans_wm.plane_res_l[i] << PLANE_WM_LINES_SHIFT;
-		temp |= p_wm->trans_wm.plane_res_b[i];
-		if (p_wm->trans_wm.plane_en[i])
+		temp |= plane_wm->trans_wm.plane_res_l << PLANE_WM_LINES_SHIFT;
+		temp |= plane_wm->trans_wm.plane_res_b;
+		if (plane_wm->trans_wm.plane_en)
 			temp |= PLANE_WM_EN;
 
 		r->plane_trans[pipe][i] = temp;
 	}
 
+	plane_wm = &p_wm->planes[PLANE_CURSOR];
 	temp = 0;
-	temp |= p_wm->trans_wm.plane_res_l[PLANE_CURSOR] << PLANE_WM_LINES_SHIFT;
-	temp |= p_wm->trans_wm.plane_res_b[PLANE_CURSOR];
-	if (p_wm->trans_wm.plane_en[PLANE_CURSOR])
+	temp |= plane_wm->trans_wm.plane_res_l << PLANE_WM_LINES_SHIFT;
+	temp |= plane_wm->trans_wm.plane_res_b;
+	if (plane_wm->trans_wm.plane_en)
 		temp |= PLANE_WM_EN;
 
 	r->plane_trans[pipe][PLANE_CURSOR] = temp;
@@ -4278,35 +4275,37 @@  static void skl_pipe_wm_active_state(uint32_t val,
 
 	if (!is_transwm) {
 		if (!is_cursor) {
-			active->wm[level].plane_en[i] = is_enabled;
-			active->wm[level].plane_res_b[i] =
-					val & PLANE_WM_BLOCKS_MASK;
-			active->wm[level].plane_res_l[i] =
-					(val >> PLANE_WM_LINES_SHIFT) &
-						PLANE_WM_LINES_MASK;
+			active->planes[i].wm[level].plane_en = is_enabled;
+			active->planes[i].wm[level].plane_res_b =
+				val & PLANE_WM_BLOCKS_MASK;
+			active->planes[i].wm[level].plane_res_l =
+				(val >> PLANE_WM_LINES_SHIFT) &
+				PLANE_WM_LINES_MASK;
 		} else {
-			active->wm[level].plane_en[PLANE_CURSOR] = is_enabled;
-			active->wm[level].plane_res_b[PLANE_CURSOR] =
-					val & PLANE_WM_BLOCKS_MASK;
-			active->wm[level].plane_res_l[PLANE_CURSOR] =
-					(val >> PLANE_WM_LINES_SHIFT) &
-						PLANE_WM_LINES_MASK;
+			active->planes[PLANE_CURSOR].wm[level].plane_en =
+				is_enabled;
+			active->planes[PLANE_CURSOR].wm[level].plane_res_b =
+				val & PLANE_WM_BLOCKS_MASK;
+			active->planes[PLANE_CURSOR].wm[level].plane_res_l =
+				(val >> PLANE_WM_LINES_SHIFT) &
+				PLANE_WM_LINES_MASK;
 		}
 	} else {
 		if (!is_cursor) {
-			active->trans_wm.plane_en[i] = is_enabled;
-			active->trans_wm.plane_res_b[i] =
-					val & PLANE_WM_BLOCKS_MASK;
-			active->trans_wm.plane_res_l[i] =
-					(val >> PLANE_WM_LINES_SHIFT) &
-						PLANE_WM_LINES_MASK;
+			active->planes[i].trans_wm.plane_en = is_enabled;
+			active->planes[i].trans_wm.plane_res_b =
+				val & PLANE_WM_BLOCKS_MASK;
+			active->planes[i].trans_wm.plane_res_l =
+				(val >> PLANE_WM_LINES_SHIFT) &
+				PLANE_WM_LINES_MASK;
 		} else {
-			active->trans_wm.plane_en[PLANE_CURSOR] = is_enabled;
-			active->trans_wm.plane_res_b[PLANE_CURSOR] =
-					val & PLANE_WM_BLOCKS_MASK;
-			active->trans_wm.plane_res_l[PLANE_CURSOR] =
-					(val >> PLANE_WM_LINES_SHIFT) &
-						PLANE_WM_LINES_MASK;
+			active->planes[PLANE_CURSOR].trans_wm.plane_en =
+				is_enabled;
+			active->planes[PLANE_CURSOR].trans_wm.plane_res_b =
+				val & PLANE_WM_BLOCKS_MASK;
+			active->planes[PLANE_CURSOR].trans_wm.plane_res_l =
+				(val >> PLANE_WM_LINES_SHIFT) &
+				PLANE_WM_LINES_MASK;
 		}
 	}
 }