drm/i915: Rename intel_shared_dpll_commit() to _swap_state()

The function intel_shared_dpll_commit() performs the equivalent of
drm_atomic_helper_swap_state() for the shared dpll state, which is not
handled by the helpers. So make it do a full swap of the state and
rename it for consistency.

v2: Fix typo in the commit message. (Durga)
v3: Rebase.
v4: Swap the states instead of just renaming the function. (Daniel)
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com> (v2)
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v3)
Link: http://patchwork.freedesktop.org/patch/msgid/1483024933-3726-3-git-send-email-ander.conselvan.de.oliveira@intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -14658,7 +14658,7 @@ static int intel_atomic_commit(struct drm_device *dev,
 
 	drm_atomic_helper_swap_state(state, true);
 	dev_priv->wm.distrust_bios_wm = false;
-	intel_shared_dpll_commit(state);
+	intel_shared_dpll_swap_state(state);
 	intel_atomic_track_fbs(state);
 
 	if (intel_state->modeset) {

drivers/gpu/drm/i915/intel_dpll_mgr.c

@@ -265,7 +265,7 @@ intel_reference_shared_dpll(struct intel_shared_dpll *pll,
 	shared_dpll[pll->id].crtc_mask |= 1 << crtc->pipe;
 }
 
-void intel_shared_dpll_commit(struct drm_atomic_state *state)
+void intel_shared_dpll_swap_state(struct drm_atomic_state *state)
 {
 	struct drm_i915_private *dev_priv = to_i915(state->dev);
 	struct intel_shared_dpll_config *shared_dpll;
@@ -277,8 +277,13 @@ void intel_shared_dpll_commit(struct drm_atomic_state *state)
 
 	shared_dpll = to_intel_atomic_state(state)->shared_dpll;
 	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+		struct intel_shared_dpll_config tmp;
+
 		pll = &dev_priv->shared_dplls[i];
+
+		tmp = pll->config;
 		pll->config = shared_dpll[i];
+		shared_dpll[i] = tmp;
 	}
 }
 

drivers/gpu/drm/i915/intel_dpll_mgr.h

@@ -152,7 +152,7 @@ void intel_release_shared_dpll(struct intel_shared_dpll *dpll,
 void intel_prepare_shared_dpll(struct intel_crtc *crtc);
 void intel_enable_shared_dpll(struct intel_crtc *crtc);
 void intel_disable_shared_dpll(struct intel_crtc *crtc);
-void intel_shared_dpll_commit(struct drm_atomic_state *state);
+void intel_shared_dpll_swap_state(struct drm_atomic_state *state);
 void intel_shared_dpll_init(struct drm_device *dev);
 
 /* BXT dpll related functions */