drm: Move simple_display_pipe prepare_fb helper into gem fb helpers

There's nothing tinydrm specific to this, and there's a few more
copies of the same in various other drivers.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: David Airlie <airlied@linux.ie>
Cc: David Lechner <david@lechnology.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Daniel Stone <daniels@collabora.com>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Acked-by: David Lechner <david@lechnology.com>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180405154449.23038-3-daniel.vetter@ffwll.ch

drivers/gpu/drm/drm_gem_framebuffer_helper.c

@@ -22,6 +22,7 @@
 #include <drm/drm_gem.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_modeset_helper.h>
+#include <drm/drm_simple_kms_helper.h>
 
 /**
  * DOC: overview
@@ -265,6 +266,24 @@ int drm_gem_fb_prepare_fb(struct drm_plane *plane,
 }
 EXPORT_SYMBOL_GPL(drm_gem_fb_prepare_fb);
 
+/**
+ * drm_gem_fb_simple_display_pipe_prepare_fb - prepare_fb helper for
+ *     &drm_simple_display_pipe
+ * @pipe: Simple display pipe
+ * @plane_state: Plane state
+ *
+ * This function uses drm_gem_fb_prepare_fb() to check if the plane FB has a
+ * &dma_buf attached, extracts the exclusive fence and attaches it to plane
+ * state for the atomic helper to wait on. Drivers can use this as their
+ * &drm_simple_display_pipe_funcs.prepare_fb callback.
+ */
+int drm_gem_fb_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
+					      struct drm_plane_state *plane_state)
+{
+	return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);
+}
+EXPORT_SYMBOL(drm_gem_fb_simple_display_pipe_prepare_fb);
+
 /**
  * drm_gem_fbdev_fb_create - Create a GEM backed &drm_framebuffer for fbdev
  *                           emulation

drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c

@@ -138,23 +138,6 @@ void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe,
 }
 EXPORT_SYMBOL(tinydrm_display_pipe_update);
 
-/**
- * tinydrm_display_pipe_prepare_fb - Display pipe prepare_fb helper
- * @pipe: Simple display pipe
- * @plane_state: Plane state
- *
- * This function uses drm_gem_fb_prepare_fb() to check if the plane FB has an
- * dma-buf attached, extracts the exclusive fence and attaches it to plane
- * state for the atomic helper to wait on. Drivers can use this as their
- * &drm_simple_display_pipe_funcs->prepare_fb callback.
- */
-int tinydrm_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
-				    struct drm_plane_state *plane_state)
-{
-	return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);
-}
-EXPORT_SYMBOL(tinydrm_display_pipe_prepare_fb);
-
 static int tinydrm_rotate_mode(struct drm_display_mode *mode,
 			       unsigned int rotation)
 {

drivers/gpu/drm/tinydrm/ili9225.c

@@ -354,7 +354,7 @@ static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
 	.enable		= ili9225_pipe_enable,
 	.disable	= ili9225_pipe_disable,
 	.update		= tinydrm_display_pipe_update,
-	.prepare_fb	= tinydrm_display_pipe_prepare_fb,
+	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
 };
 
 static const struct drm_display_mode ili9225_mode = {

drivers/gpu/drm/tinydrm/mi0283qt.c

@@ -19,6 +19,7 @@
 
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_modeset_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/tinydrm/mipi-dbi.h>
 #include <drm/tinydrm/tinydrm-helpers.h>
 #include <video/mipi_display.h>
@@ -134,7 +135,7 @@ static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
 	.enable = mi0283qt_enable,
 	.disable = mipi_dbi_pipe_disable,
 	.update = tinydrm_display_pipe_update,
-	.prepare_fb = tinydrm_display_pipe_prepare_fb,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
 };
 
 static const struct drm_display_mode mi0283qt_mode = {

drivers/gpu/drm/tinydrm/repaper.c

@@ -841,7 +841,7 @@ static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = {
 	.enable = repaper_pipe_enable,
 	.disable = repaper_pipe_disable,
 	.update = tinydrm_display_pipe_update,
-	.prepare_fb = tinydrm_display_pipe_prepare_fb,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
 };
 
 static const uint32_t repaper_formats[] = {

drivers/gpu/drm/tinydrm/st7586.c

@@ -290,7 +290,7 @@ static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
 	.enable		= st7586_pipe_enable,
 	.disable	= st7586_pipe_disable,
 	.update		= tinydrm_display_pipe_update,
-	.prepare_fb	= tinydrm_display_pipe_prepare_fb,
+	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
 };
 
 static const struct drm_display_mode st7586_mode = {

drivers/gpu/drm/tinydrm/st7735r.c

@@ -106,7 +106,7 @@ static const struct drm_simple_display_pipe_funcs jd_t18003_t01_pipe_funcs = {
 	.enable		= jd_t18003_t01_pipe_enable,
 	.disable	= mipi_dbi_pipe_disable,
 	.update		= tinydrm_display_pipe_update,
-	.prepare_fb	= tinydrm_display_pipe_prepare_fb,
+	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
 };
 
 static const struct drm_display_mode jd_t18003_t01_mode = {

include/drm/drm_gem_framebuffer_helper.h

@@ -10,6 +10,7 @@ struct drm_gem_object;
 struct drm_mode_fb_cmd2;
 struct drm_plane;
 struct drm_plane_state;
+struct drm_simple_display_pipe;
 
 struct drm_gem_object *drm_gem_fb_get_obj(struct drm_framebuffer *fb,
 					  unsigned int plane);
@@ -27,6 +28,8 @@ drm_gem_fb_create(struct drm_device *dev, struct drm_file *file,
 
 int drm_gem_fb_prepare_fb(struct drm_plane *plane,
 			  struct drm_plane_state *state);
+int drm_gem_fb_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
+					      struct drm_plane_state *plane_state);
 
 struct drm_framebuffer *
 drm_gem_fbdev_fb_create(struct drm_device *dev,

include/drm/drm_simple_kms_helper.h

@@ -116,6 +116,9 @@ struct drm_simple_display_pipe_funcs {
 	 * Optional, called by &drm_plane_helper_funcs.prepare_fb.  Please read
 	 * the documentation for the &drm_plane_helper_funcs.prepare_fb hook for
 	 * more details.
+	 *
+	 * Drivers which always have their buffers pinned should use
+	 * drm_gem_fb_simple_display_pipe_prepare_fb() for this hook.
 	 */
 	int (*prepare_fb)(struct drm_simple_display_pipe *pipe,
 			  struct drm_plane_state *plane_state);

include/drm/tinydrm/tinydrm.h

@@ -95,8 +95,6 @@ void tinydrm_shutdown(struct tinydrm_device *tdev);
 
 void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe,
 				 struct drm_plane_state *old_state);
-int tinydrm_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
-				    struct drm_plane_state *plane_state);
 int
 tinydrm_display_pipe_init(struct tinydrm_device *tdev,
 			  const struct drm_simple_display_pipe_funcs *funcs,