drm: add hotspot support for cursors.

So it looks like for virtual hw cursors on QXL we need to inform
the "hw" device what the cursor hotspot parameters are. This
makes sense if you think the host has to draw the cursor and interpret
clicks from it. However the current modesetting interface doesn't support
passing the hotspot information from userspace.

This implements a new cursor ioctl, that takes the hotspot info as well,
userspace can try calling the new interface and if it gets -ENOSYS it means
its on an older kernel and can just fallback.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 19 insertions, 0 deletions

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 0fd007af8de9..663c3ab47752 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -339,6 +339,9 @@ struct drm_crtc_funcs {
         /* cursor controls */
         int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv,
                           uint32_t handle, uint32_t width, uint32_t height);
+        int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv,
+                           uint32_t handle, uint32_t width, uint32_t height,
+                           int32_t hot_x, int32_t hot_y);
         int (*cursor_move)(struct drm_crtc *crtc, int x, int y);
 
         /* Set gamma on the CRTC */
@@ -1018,6 +1021,8 @@ extern int drm_mode_setplane(struct drm_device *dev,
                                void *data, struct drm_file *file_priv);
 extern int drm_mode_cursor_ioctl(struct drm_device *dev,
                                 void *data, struct drm_file *file_priv);
+extern int drm_mode_cursor2_ioctl(struct drm_device *dev,
+                                void *data, struct drm_file *file_priv);
 extern int drm_mode_addfb(struct drm_device *dev,
                           void *data, struct drm_file *file_priv);
 extern int drm_mode_addfb2(struct drm_device *dev,
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 5a57be68bab7..238a166b9fe6 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -732,6 +732,7 @@ struct drm_prime_handle {
 #define DRM_IOCTL_MODE_ADDFB2           DRM_IOWR(0xB8, struct drm_mode_fb_cmd2)
 #define DRM_IOCTL_MODE_OBJ_GETPROPERTIES        DRM_IOWR(0xB9, struct drm_mode_obj_get_properties)
 #define DRM_IOCTL_MODE_OBJ_SETPROPERTY  DRM_IOWR(0xBA, struct drm_mode_obj_set_property)
+#define DRM_IOCTL_MODE_CURSOR2          DRM_IOWR(0xBB, struct drm_mode_cursor2)
 
 /**
  * Device specific ioctls should only be in their respective headers
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 090e5331ab7e..53db7cea373b 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -388,6 +388,19 @@ struct drm_mode_cursor {
         __u32 handle;
 };
 
+struct drm_mode_cursor2 {
+        __u32 flags;
+        __u32 crtc_id;
+        __s32 x;
+        __s32 y;
+        __u32 width;
+        __u32 height;
+        /* driver specific handle */
+        __u32 handle;
+        __s32 hot_x;
+        __s32 hot_y;
+};
+
 struct drm_mode_crtc_lut {
         __u32 crtc_id;
         __u32 gamma_size;