drm/i915: Add crtc state duplication/destruction functions
The atomic helpers need these to prepare a new state object when
starting a new atomic operation.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 52ef6f4..19a9dd5 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -200,3 +200,38 @@
return -EINVAL;
}
+
+/*
+ * intel_crtc_duplicate_state - duplicate crtc state
+ * @crtc: drm crtc
+ *
+ * Allocates and returns a copy of the crtc state (both common and
+ * Intel-specific) for the specified crtc.
+ *
+ * Returns: The newly allocated crtc state, or NULL on failure.
+ */
+struct drm_crtc_state *
+intel_crtc_duplicate_state(struct drm_crtc *crtc)
+{
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ if (WARN_ON(!intel_crtc->config))
+ return kzalloc(sizeof(*intel_crtc->config), GFP_KERNEL);
+
+ return kmemdup(intel_crtc->config, sizeof(*intel_crtc->config),
+ GFP_KERNEL);
+}
+
+/**
+ * intel_crtc_destroy_state - destroy crtc state
+ * @crtc: drm crtc
+ *
+ * Destroys the crtc state (both common and Intel-specific) for the
+ * specified crtc.
+ */
+void
+intel_crtc_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ drm_atomic_helper_crtc_destroy_state(crtc, state);
+}