drm: Add drm_crtc_init_with_planes() (v2)

Add a new drm_crtc_init_with_planes() to allow drivers to provide
specific primary and cursor planes at CRTC initialization.  The existing
drm_crtc_init() interface remains to avoid driver churn in existing
drivers; it will initialize the CRTC with a plane helper-created primary
plane and no cursor plane.

v2:
  - Move drm_crtc_init() to plane helper file so that nothing in the DRM
    core depends on helpers.  [suggested by Daniel Vetter]
  - Keep cursor parameter to drm_crtc_init_with_planes() a void* until
    we actually add cursor support.  [suggested by Daniel Vetter]

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 4c4f792588e9..46790c0de845 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -270,6 +270,8 @@ struct drm_crtc_funcs {
  * @dev: parent DRM device
  * @head: list management
  * @base: base KMS object for ID tracking etc.
+ * @primary: primary plane for this CRTC
+ * @cursor: cursor plane for this CRTC
  * @enabled: is this CRTC enabled?
  * @mode: current mode timings
  * @hwmode: mode timings as programmed to hw regs
@@ -305,6 +307,10 @@ struct drm_crtc {
 
         struct drm_mode_object base;
 
+        /* primary and cursor planes for CRTC */
+        struct drm_plane *primary;
+        struct drm_plane *cursor;
+
         /* framebuffer the connector is currently bound to */
         struct drm_framebuffer *fb;
 
@@ -824,6 +830,11 @@ extern void drm_modeset_lock_all(struct drm_device *dev);
 extern void drm_modeset_unlock_all(struct drm_device *dev);
 extern void drm_warn_on_modeset_not_all_locked(struct drm_device *dev);
 
+extern int drm_crtc_init_with_planes(struct drm_device *dev,
+                                     struct drm_crtc *crtc,
+                                     struct drm_plane *primary,
+                                     void *cursor,
+                                     const struct drm_crtc_funcs *funcs);
 extern int drm_crtc_init(struct drm_device *dev,
                          struct drm_crtc *crtc,
                          const struct drm_crtc_funcs *funcs);