drm/i915/fbc: Track FBC usage per-plane

In the future we may have multiple planes on the same pipe
capable of using FBC. Prepare for that by tracking FBC usage
per-plane rather than per-crtc.

v2: s/intel_get_crtc_for_pipe/intel_crtc_for_pipe/
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211124113652.22090-9-ville.syrjala@linux.intel.comReviewed-by: Mika Kahola <mika.kahola@intel.com>

drivers/gpu/drm/i915/i915_drv.h

@@ -402,7 +402,7 @@ struct intel_fbc {
 	struct mutex lock;
 	unsigned int possible_framebuffer_bits;
 	unsigned int busy_bits;
-	struct intel_crtc *crtc;
+	struct intel_plane *plane;
 
 	struct drm_mm_node compressed_fb;
 	struct drm_mm_node compressed_llb;

drivers/gpu/drm/i915/i915_trace.h

@@ -372,8 +372,8 @@ TRACE_EVENT(intel_plane_disable_arm,
 /* fbc */
 
 TRACE_EVENT(intel_fbc_activate,
-	    TP_PROTO(struct intel_crtc *crtc),
-	    TP_ARGS(crtc),
+	    TP_PROTO(struct intel_plane *plane),
+	    TP_ARGS(plane),
 
 	    TP_STRUCT__entry(
 			     __field(enum pipe, pipe)
@@ -382,6 +382,8 @@ TRACE_EVENT(intel_fbc_activate,
 			     ),
 
 	    TP_fast_assign(
+			   struct intel_crtc *crtc = intel_crtc_for_pipe(to_i915(plane->base.dev),
+									 plane->pipe);
 			   __entry->pipe = crtc->pipe;
 			   __entry->frame = intel_crtc_get_vblank_counter(crtc);
 			   __entry->scanline = intel_get_crtc_scanline(crtc);
@@ -392,8 +394,8 @@ TRACE_EVENT(intel_fbc_activate,
 );
 
 TRACE_EVENT(intel_fbc_deactivate,
-	    TP_PROTO(struct intel_crtc *crtc),
-	    TP_ARGS(crtc),
+	    TP_PROTO(struct intel_plane *plane),
+	    TP_ARGS(plane),
 
 	    TP_STRUCT__entry(
 			     __field(enum pipe, pipe)
@@ -402,6 +404,8 @@ TRACE_EVENT(intel_fbc_deactivate,
 			     ),
 
 	    TP_fast_assign(
+			   struct intel_crtc *crtc = intel_crtc_for_pipe(to_i915(plane->base.dev),
+									 plane->pipe);
 			   __entry->pipe = crtc->pipe;
 			   __entry->frame = intel_crtc_get_vblank_counter(crtc);
 			   __entry->scanline = intel_get_crtc_scanline(crtc);
@@ -412,8 +416,8 @@ TRACE_EVENT(intel_fbc_deactivate,
 );
 
 TRACE_EVENT(intel_fbc_nuke,
-	    TP_PROTO(struct intel_crtc *crtc),
-	    TP_ARGS(crtc),
+	    TP_PROTO(struct intel_plane *plane),
+	    TP_ARGS(plane),
 
 	    TP_STRUCT__entry(
 			     __field(enum pipe, pipe)
@@ -422,6 +426,8 @@ TRACE_EVENT(intel_fbc_nuke,
 			     ),
 
 	    TP_fast_assign(
+			   struct intel_crtc *crtc = intel_crtc_for_pipe(to_i915(plane->base.dev),
+									 plane->pipe);
 			   __entry->pipe = crtc->pipe;
 			   __entry->frame = intel_crtc_get_vblank_counter(crtc);
 			   __entry->scanline = intel_get_crtc_scanline(crtc);