drm, kdb, kms: Add an enter argument to mode_set_base_atomic() API

Some devices such as the radeon chips receive information from user
space which needs to be saved when executing an atomic mode set
operation, else the user space would have to be queried again for the
information.

This patch extends the mode_set_base_atomic() call to pass an argument
to indicate if this is an entry or an exit from an atomic kernel mode
set change.  Individual drm drivers can properly save and restore
state accordingly.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Airlie <airlied@linux.ie>
CC: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_fb_helper.c

@@ -263,7 +263,8 @@ int drm_fb_helper_debug_enter(struct fb_info *info)
 			funcs->mode_set_base_atomic(mode_set->crtc,
 						    mode_set->fb,
 						    mode_set->x,
-						    mode_set->y);
+						    mode_set->y,
+						    1);
 
 		}
 	}
@@ -309,7 +310,7 @@ int drm_fb_helper_debug_leave(struct fb_info *info)
 		}
 
 		funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
-					    crtc->y);
+					    crtc->y, 0);
 	}
 
 	return 0;

drivers/gpu/drm/i915/intel_display.c

@@ -1492,7 +1492,7 @@ err_unpin:
 /* Assume fb object is pinned & idle & fenced and just update base pointers */
 static int
 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
-			   int x, int y)
+			   int x, int y, int enter)
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1614,7 +1614,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
 			   atomic_read(&obj_priv->pending_flip) == 0);
 	}
 
-	ret = intel_pipe_set_base_atomic(crtc, crtc->fb, x, y);
+	ret = intel_pipe_set_base_atomic(crtc, crtc->fb, x, y, 0);
 	if (ret) {
 		i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
 		mutex_unlock(&dev->struct_mutex);

drivers/gpu/drm/nouveau/nv04_crtc.c

@@ -858,7 +858,7 @@ nv04_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 static int
 nv04_crtc_mode_set_base_atomic(struct drm_crtc *crtc,
 			       struct drm_framebuffer *fb,
-			       int x, int y)
+			       int x, int y, int enter)
 {
 	return nv04_crtc_do_mode_set_base(crtc, fb, x, y, true);
 }

drivers/gpu/drm/nouveau/nv50_crtc.c

@@ -712,7 +712,7 @@ nv50_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 static int
 nv50_crtc_mode_set_base_atomic(struct drm_crtc *crtc,
 			       struct drm_framebuffer *fb,
-			       int x, int y)
+			       int x, int y, int enter)
 {
 	return nv50_crtc_do_mode_set_base(crtc, fb, x, y, true, true);
 }

drivers/gpu/drm/radeon/atombios_crtc.c

@@ -1180,7 +1180,7 @@ int atombios_crtc_set_base(struct drm_crtc *crtc, int x, int y,
 
 int atombios_crtc_set_base_atomic(struct drm_crtc *crtc,
                                   struct drm_framebuffer *fb,
-                                  int x, int y)
+                                  int x, int y, int enter)
 {
        struct drm_device *dev = crtc->dev;
        struct radeon_device *rdev = dev->dev_private;

drivers/gpu/drm/radeon/radeon_legacy_crtc.c

@@ -353,7 +353,7 @@ int radeon_crtc_set_base(struct drm_crtc *crtc, int x, int y,
 
 int radeon_crtc_set_base_atomic(struct drm_crtc *crtc,
 				struct drm_framebuffer *fb,
-				int x, int y)
+				int x, int y, int enter)
 {
 	return radeon_crtc_do_set_base(crtc, fb, x, y, 1);
 }

drivers/gpu/drm/radeon/radeon_mode.h

@@ -516,7 +516,7 @@ extern int atombios_crtc_set_base(struct drm_crtc *crtc, int x, int y,
 				   struct drm_framebuffer *old_fb);
 extern int atombios_crtc_set_base_atomic(struct drm_crtc *crtc,
 					 struct drm_framebuffer *fb,
-					 int x, int y);
+					 int x, int y, int enter);
 extern int atombios_crtc_mode_set(struct drm_crtc *crtc,
 				   struct drm_display_mode *mode,
 				   struct drm_display_mode *adjusted_mode,
@@ -528,7 +528,7 @@ extern int radeon_crtc_set_base(struct drm_crtc *crtc, int x, int y,
 				 struct drm_framebuffer *old_fb);
 extern int radeon_crtc_set_base_atomic(struct drm_crtc *crtc,
 				       struct drm_framebuffer *fb,
-				       int x, int y);
+				       int x, int y, int enter);
 extern int radeon_crtc_do_set_base(struct drm_crtc *crtc,
 				   struct drm_framebuffer *fb,
 				   int x, int y, int atomic);

include/drm/drm_crtc_helper.h

@@ -61,7 +61,8 @@ struct drm_crtc_helper_funcs {
 	int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
 			     struct drm_framebuffer *old_fb);
 	int (*mode_set_base_atomic)(struct drm_crtc *crtc,
-				    struct drm_framebuffer *fb, int x, int y);
+				    struct drm_framebuffer *fb, int x, int y,
+				    int is_enter);
 
 	/* reload the current crtc LUT */
 	void (*load_lut)(struct drm_crtc *crtc);