drm/i915/bw: make struct intel_bw_state opaque

With all the code touching struct intel_bw_state moved inside
intel_bw.c, we move the struct definition there too, and make the type
opaque. to_intel_bw_state() needs to be turned into a proper
function. All of this nicely reduces includes from intel_bw.h.

Reviewed-by: Imre Deak <[e-mail]>
Link: https://lore.kernel.org/r/743[e-mail]
Signed-off-by: Jani Nikula <[e-mail]>

drivers/gpu/drm/i915/display/intel_bw.c

···
 #include "intel_uncore.h"
 #include "skl_watermark.h"
 
+struct intel_dbuf_bw {
+	unsigned int max_bw[I915_MAX_DBUF_SLICES];
+	u8 active_planes[I915_MAX_DBUF_SLICES];
+};
+
+struct intel_bw_state {
+	struct intel_global_state base;
+	struct intel_dbuf_bw dbuf_bw[I915_MAX_PIPES];
+
+	/*
+	 * Contains a bit mask, used to determine, whether correspondent
+	 * pipe allows SAGV or not.
+	 */
+	u8 pipe_sagv_reject;
+
+	/* bitmask of active pipes */
+	u8 active_pipes;
+
+	/*
+	 * From MTL onwards, to lock a QGV point, punit expects the peak BW of
+	 * the selected QGV point as the parameter in multiples of 100MB/s
+	 */
+	u16 qgv_point_peakbw;
+
+	/*
+	 * Current QGV points mask, which restricts
+	 * some particular SAGV states, not to confuse
+	 * with pipe_sagv_mask.
+	 */
+	u16 qgv_points_mask;
+
+	unsigned int data_rate[I915_MAX_PIPES];
+	u8 num_active_planes[I915_MAX_PIPES];
+};
+
 /* Parameters for Qclk Geyserville (QGV) */
 struct intel_qgv_point {
 	u16 dclk, t_rp, t_rdpre, t_rc, t_ras, t_rcd;
···
 		data_rate = DIV_ROUND_UP(data_rate * 105, 100);
 
 	return data_rate;
+}
+
+struct intel_bw_state *to_intel_bw_state(struct intel_global_state *obj_state)
+{
+	return container_of(obj_state, struct intel_bw_state, base);
 }
 
 struct intel_bw_state *

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

···
 
 #include <drm/drm_atomic.h>
 
-#include "intel_display_limits.h"
-#include "intel_display_power.h"
-#include "intel_global_state.h"
-
 struct intel_atomic_state;
+struct intel_bw_state;
 struct intel_crtc;
 struct intel_crtc_state;
 struct intel_display;
+struct intel_global_state;
 
-struct intel_dbuf_bw {
-	unsigned int max_bw[I915_MAX_DBUF_SLICES];
-	u8 active_planes[I915_MAX_DBUF_SLICES];
-};
-
-struct intel_bw_state {
-	struct intel_global_state base;
-	struct intel_dbuf_bw dbuf_bw[I915_MAX_PIPES];
-
-	/*
-	 * Contains a bit mask, used to determine, whether correspondent
-	 * pipe allows SAGV or not.
-	 */
-	u8 pipe_sagv_reject;
-
-	/* bitmask of active pipes */
-	u8 active_pipes;
-
-	/*
-	 * From MTL onwards, to lock a QGV point, punit expects the peak BW of
-	 * the selected QGV point as the parameter in multiples of 100MB/s
-	 */
-	u16 qgv_point_peakbw;
-
-	/*
-	 * Current QGV points mask, which restricts
-	 * some particular SAGV states, not to confuse
-	 * with pipe_sagv_mask.
-	 */
-	u16 qgv_points_mask;
-
-	unsigned int data_rate[I915_MAX_PIPES];
-	u8 num_active_planes[I915_MAX_PIPES];
-};
-
-#define to_intel_bw_state(global_state) \
-	container_of_const((global_state), struct intel_bw_state, base)
+struct intel_bw_state *to_intel_bw_state(struct intel_global_state *obj_state);
 
 struct intel_bw_state *
 intel_atomic_get_old_bw_state(struct intel_atomic_state *state);