drm/i915: extract intel_fbc.h from intel_drv.h

It used to be handy that we only had a couple of headers, but over time
intel_drv.h has become unwieldy. Extract declarations to a separate
header file corresponding to the implementation module, clarifying the
modularity of the driver.

Ensure the new header is self-contained, and do so with minimal further
includes, using forward declarations as needed. Include the new header
only where needed, and sort the modified include directives while at it
and as needed.

No functional changes.

v2: Remove stray newline (Chris)

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/db44ba199c86f24bfa9e490531eddf51cccd89da.1554461791.git.jani.nikula@intel.com

11 files changed, 59 insertions, 30 deletions

diff --git a/drivers/gpu/drm/i915/Makefile.header-test b/drivers/gpu/drm/i915/Makefile.header-test
index e03285ccad24..1099de6c8bda 100644
--- a/drivers/gpu/drm/i915/Makefile.header-test
+++ b/drivers/gpu/drm/i915/Makefile.header-test
@@ -15,6 +15,7 @@ header_test := \
 	intel_csr.h \
 	intel_ddi.h \
 	intel_engine_types.h \
+	intel_fbc.h \
 	intel_frontbuffer.h \
 	intel_workarounds_types.h
 
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 4dd2d9ae3202..89a3b1802965 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -26,14 +26,16 @@
  *
  */
 
-#include <linux/sort.h>
 #include <linux/sched/mm.h>
+#include <linux/sort.h>
+
 #include <drm/drm_debugfs.h>
 #include <drm/drm_fourcc.h>
-#include "intel_drv.h"
-#include "intel_guc_submission.h"
 
 #include "i915_reset.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
+#include "intel_guc_submission.h"
 
 static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
 {
diff --git a/drivers/gpu/drm/i915/i915_reset.h b/drivers/gpu/drm/i915/i915_reset.h
index 86b1ac8116ce..3c0450289b8f 100644
--- a/drivers/gpu/drm/i915/i915_reset.h
+++ b/drivers/gpu/drm/i915/i915_reset.h
@@ -14,6 +14,7 @@
 #include "intel_engine_types.h"
 
 struct drm_i915_private;
+struct i915_request;
 struct intel_engine_cs;
 struct intel_guc;
 
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index d2f2a9c2fabd..95f3dab1b229 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -25,8 +25,10 @@
  */
 
 #include <drm/i915_drm.h>
-#include "intel_drv.h"
+
 #include "i915_reg.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
 
 static void i915_save_display(struct drm_i915_private *dev_priv)
 {
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0d0c363a5077..06ae3093b02b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -52,6 +52,7 @@
 #include "intel_ddi.h"
 #include "intel_drv.h"
 #include "intel_dsi.h"
+#include "intel_fbc.h"
 #include "intel_frontbuffer.h"
 
 /* Primary plane formats for gen <= 3 */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 9404dfcbfd3a..cc0d179b6c43 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -2012,30 +2012,6 @@ static inline void intel_fbdev_restore_mode(struct drm_device *dev)
 }
 #endif
 
-/* intel_fbc.c */
-void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
-			   struct intel_atomic_state *state);
-bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
-void intel_fbc_pre_update(struct intel_crtc *crtc,
-			  struct intel_crtc_state *crtc_state,
-			  struct intel_plane_state *plane_state);
-void intel_fbc_post_update(struct intel_crtc *crtc);
-void intel_fbc_init(struct drm_i915_private *dev_priv);
-void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv);
-void intel_fbc_enable(struct intel_crtc *crtc,
-		      struct intel_crtc_state *crtc_state,
-		      struct intel_plane_state *plane_state);
-void intel_fbc_disable(struct intel_crtc *crtc);
-void intel_fbc_global_disable(struct drm_i915_private *dev_priv);
-void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
-			  unsigned int frontbuffer_bits,
-			  enum fb_op_origin origin);
-void intel_fbc_flush(struct drm_i915_private *dev_priv,
-		     unsigned int frontbuffer_bits, enum fb_op_origin origin);
-void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv);
-void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *dev_priv);
-int intel_fbc_reset_underrun(struct drm_i915_private *dev_priv);
-
 /* intel_hdmi.c */
 void intel_hdmi_init(struct drm_i915_private *dev_priv, i915_reg_t hdmi_reg,
 		     enum port port);
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 43fe08be3b7d..910a4c2e3419 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -40,8 +40,9 @@
 
 #include <drm/drm_fourcc.h>
 
-#include "intel_drv.h"
 #include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
 
 static inline bool fbc_supported(struct drm_i915_private *dev_priv)
 {
diff --git a/drivers/gpu/drm/i915/intel_fbc.h b/drivers/gpu/drm/i915/intel_fbc.h
new file mode 100644
index 000000000000..50272eda8d43
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_fbc.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_FBC_H__
+#define __INTEL_FBC_H__
+
+#include <linux/types.h>
+
+#include "intel_frontbuffer.h"
+
+struct drm_i915_private;
+struct intel_atomic_state;
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_plane_state;
+
+void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
+			   struct intel_atomic_state *state);
+bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
+void intel_fbc_pre_update(struct intel_crtc *crtc,
+			  struct intel_crtc_state *crtc_state,
+			  struct intel_plane_state *plane_state);
+void intel_fbc_post_update(struct intel_crtc *crtc);
+void intel_fbc_init(struct drm_i915_private *dev_priv);
+void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv);
+void intel_fbc_enable(struct intel_crtc *crtc,
+		      struct intel_crtc_state *crtc_state,
+		      struct intel_plane_state *plane_state);
+void intel_fbc_disable(struct intel_crtc *crtc);
+void intel_fbc_global_disable(struct drm_i915_private *dev_priv);
+void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
+			  unsigned int frontbuffer_bits,
+			  enum fb_op_origin origin);
+void intel_fbc_flush(struct drm_i915_private *dev_priv,
+		     unsigned int frontbuffer_bits, enum fb_op_origin origin);
+void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv);
+void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *dev_priv);
+int intel_fbc_reset_underrun(struct drm_i915_private *dev_priv);
+
+#endif /* __INTEL_FBC_H__ */
diff --git a/drivers/gpu/drm/i915/intel_fifo_underrun.c b/drivers/gpu/drm/i915/intel_fifo_underrun.c
index f33de4be4b89..74c8b0528294 100644
--- a/drivers/gpu/drm/i915/intel_fifo_underrun.c
+++ b/drivers/gpu/drm/i915/intel_fifo_underrun.c
@@ -27,6 +27,7 @@
 
 #include "i915_drv.h"
 #include "intel_drv.h"
+#include "intel_fbc.h"
 
 /**
  * DOC: fifo underrun handling
diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c
index 16f253deaf8d..1d19da2ffee8 100644
--- a/drivers/gpu/drm/i915/intel_frontbuffer.c
+++ b/drivers/gpu/drm/i915/intel_frontbuffer.c
@@ -61,9 +61,10 @@
  */
 
 
+#include "i915_drv.h"
 #include "intel_drv.h"
+#include "intel_fbc.h"
 #include "intel_frontbuffer.h"
-#include "i915_drv.h"
 
 void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
 			       enum fb_op_origin origin,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 0e05ee1f3ea0..b3c4f640117f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -35,6 +35,7 @@
 
 #include "i915_drv.h"
 #include "intel_drv.h"
+#include "intel_fbc.h"
 #include "../../../platform/x86/intel_ips.h"
 
 /**