drm: add KGDB/KDB support

Implement the callbacks for KDB entry/exit via the drm helpers.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
index 1121f7799c6f..10f7d03e58a9 100644
--- a/include/drm/drm_crtc_helper.h
+++ b/include/drm/drm_crtc_helper.h
@@ -60,6 +60,8 @@ struct drm_crtc_helper_funcs {
         /* Move the crtc on the current fb to the given position *optional* */
         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);
 
         /* reload the current crtc LUT */
         void (*load_lut)(struct drm_crtc *crtc);
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index f0a6afc47e76..f22e7fe4b6db 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -32,6 +32,8 @@
 
 struct drm_fb_helper;
 
+#include <linux/kgdb.h>
+
 struct drm_fb_helper_crtc {
         uint32_t crtc_id;
         struct drm_mode_set mode_set;
@@ -78,6 +80,7 @@ struct drm_fb_helper_connector {
 
 struct drm_fb_helper {
         struct drm_framebuffer *fb;
+        struct drm_framebuffer *saved_fb;
         struct drm_device *dev;
         struct drm_display_mode *mode;
         int crtc_count;
@@ -126,5 +129,7 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
+int drm_fb_helper_debug_enter(struct fb_info *info);
+int drm_fb_helper_debug_leave(struct fb_info *info);
 
 #endif