drm/i915: Pass plane to watermark calculation functions

Sometimes we might need to change the way we calculate
watermarks, based on which particular plane it is calculated
for. Thus it would be convenient to pass plane struct to those
functions.

v2: Pass plane instead of plane_id
v3: Do not pass plane to skl_cursor_allocation(Ville Syrjälä)
v4: - Make intel_crtc_get_plane static again(Ville Syrjälä)
    - s/cursor_plane/plane(Ville Syrjälä)
    - Pass plane to skl_compute_wm_* instead of plane_id(Ville Syrjälä)
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220124090653.14547-2-stanislav.lisovskiy@intel.com

drivers/gpu/drm/i915/display/intel_atomic_plane.h

@@ -16,6 +16,7 @@ struct intel_crtc;
 struct intel_crtc_state;
 struct intel_plane;
 struct intel_plane_state;
+enum plane_id;
 
 unsigned int intel_adjusted_rate(const struct drm_rect *src,
 				 const struct drm_rect *dst,

drivers/gpu/drm/i915/intel_pm.c

@@ -4240,7 +4240,9 @@ static int skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
 				 u64 modifier, unsigned int rotation,
 				 u32 plane_pixel_rate, struct skl_wm_params *wp,
 				 int color_plane);
+
 static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
+				 struct intel_plane *plane,
 				 int level,
 				 unsigned int latency,
 				 const struct skl_wm_params *wp,
@@ -4251,6 +4253,7 @@ static unsigned int
 skl_cursor_allocation(const struct intel_crtc_state *crtc_state,
 		      int num_active)
 {
+	struct intel_plane *plane = to_intel_plane(crtc_state->uapi.crtc->cursor);
 	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
 	int level, max_level = ilk_wm_max_level(dev_priv);
 	struct skl_wm_level wm = {};
@@ -4267,7 +4270,7 @@ skl_cursor_allocation(const struct intel_crtc_state *crtc_state,
 	for (level = 0; level <= max_level; level++) {
 		unsigned int latency = dev_priv->wm.skl_latency[level];
 
-		skl_compute_plane_wm(crtc_state, level, latency, &wp, &wm, &wm);
+		skl_compute_plane_wm(crtc_state, plane, level, latency, &wp, &wm, &wm);
 		if (wm.min_ddb_alloc == U16_MAX)
 			break;
 
@@ -5495,6 +5498,7 @@ static int skl_wm_max_lines(struct drm_i915_private *dev_priv)
 }
 
 static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
+				 struct intel_plane *plane,
 				 int level,
 				 unsigned int latency,
 				 const struct skl_wm_params *wp,
@@ -5622,6 +5626,7 @@ static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
 
 static void
 skl_compute_wm_levels(const struct intel_crtc_state *crtc_state,
+		      struct intel_plane *plane,
 		      const struct skl_wm_params *wm_params,
 		      struct skl_wm_level *levels)
 {
@@ -5633,7 +5638,7 @@ skl_compute_wm_levels(const struct intel_crtc_state *crtc_state,
 		struct skl_wm_level *result = &levels[level];
 		unsigned int latency = dev_priv->wm.skl_latency[level];
 
-		skl_compute_plane_wm(crtc_state, level, latency,
+		skl_compute_plane_wm(crtc_state, plane, level, latency,
 				     wm_params, result_prev, result);
 
 		result_prev = result;
@@ -5641,6 +5646,7 @@ skl_compute_wm_levels(const struct intel_crtc_state *crtc_state,
 }
 
 static void tgl_compute_sagv_wm(const struct intel_crtc_state *crtc_state,
+				struct intel_plane *plane,
 				const struct skl_wm_params *wm_params,
 				struct skl_plane_wm *plane_wm)
 {
@@ -5649,7 +5655,7 @@ static void tgl_compute_sagv_wm(const struct intel_crtc_state *crtc_state,
 	struct skl_wm_level *levels = plane_wm->wm;
 	unsigned int latency = dev_priv->wm.skl_latency[0] + dev_priv->sagv_block_time_us;
 
-	skl_compute_plane_wm(crtc_state, 0, latency,
+	skl_compute_plane_wm(crtc_state, plane, 0, latency,
 			     wm_params, &levels[0],
 			     sagv_wm);
 }
@@ -5719,11 +5725,11 @@ static void skl_compute_transition_wm(struct drm_i915_private *dev_priv,
 
 static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state,
 				     const struct intel_plane_state *plane_state,
-				     enum plane_id plane_id, int color_plane)
+				     struct intel_plane *plane, int color_plane)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id];
+	struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id];
 	struct skl_wm_params wm_params;
 	int ret;
 
@@ -5732,13 +5738,13 @@ static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state,
 	if (ret)
 		return ret;
 
-	skl_compute_wm_levels(crtc_state, &wm_params, wm->wm);
+	skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->wm);
 
 	skl_compute_transition_wm(dev_priv, &wm->trans_wm,
 				  &wm->wm[0], &wm_params);
 
 	if (DISPLAY_VER(dev_priv) >= 12) {
-		tgl_compute_sagv_wm(crtc_state, &wm_params, wm);
+		tgl_compute_sagv_wm(crtc_state, plane, &wm_params, wm);
 
 		skl_compute_transition_wm(dev_priv, &wm->sagv.trans_wm,
 					  &wm->sagv.wm0, &wm_params);
@@ -5749,9 +5755,9 @@ static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state,
 
 static int skl_build_plane_wm_uv(struct intel_crtc_state *crtc_state,
 				 const struct intel_plane_state *plane_state,
-				 enum plane_id plane_id)
+				 struct intel_plane *plane)
 {
-	struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id];
+	struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id];
 	struct skl_wm_params wm_params;
 	int ret;
 
@@ -5763,7 +5769,7 @@ static int skl_build_plane_wm_uv(struct intel_crtc_state *crtc_state,
 	if (ret)
 		return ret;
 
-	skl_compute_wm_levels(crtc_state, &wm_params, wm->uv_wm);
+	skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->uv_wm);
 
 	return 0;
 }
@@ -5783,13 +5789,13 @@ static int skl_build_plane_wm(struct intel_crtc_state *crtc_state,
 		return 0;
 
 	ret = skl_build_plane_wm_single(crtc_state, plane_state,
-					plane_id, 0);
+					plane, 0);
 	if (ret)
 		return ret;
 
 	if (fb->format->is_yuv && fb->format->num_planes > 1) {
 		ret = skl_build_plane_wm_uv(crtc_state, plane_state,
-					    plane_id);
+					    plane);
 		if (ret)
 			return ret;
 	}
@@ -5814,7 +5820,6 @@ static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
 
 	if (plane_state->planar_linked_plane) {
 		const struct drm_framebuffer *fb = plane_state->hw.fb;
-		enum plane_id y_plane_id = plane_state->planar_linked_plane->id;
 
 		drm_WARN_ON(&dev_priv->drm,
 			    !intel_wm_plane_visible(crtc_state, plane_state));
@@ -5822,17 +5827,17 @@ static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
 			    fb->format->num_planes == 1);
 
 		ret = skl_build_plane_wm_single(crtc_state, plane_state,
-						y_plane_id, 0);
+						plane_state->planar_linked_plane, 0);
 		if (ret)
 			return ret;
 
 		ret = skl_build_plane_wm_single(crtc_state, plane_state,
-						plane_id, 1);
+						plane, 1);
 		if (ret)
 			return ret;
 	} else if (intel_wm_plane_visible(crtc_state, plane_state)) {
 		ret = skl_build_plane_wm_single(crtc_state, plane_state,
-						plane_id, 0);
+						plane, 0);
 		if (ret)
 			return ret;
 	}