Atomic resume was preserving the dpll state because it was required
for clearing pll state correctly. If we look at the old_crtc_state
for pll to clear this is not needed and the hack can be removed.

Signed-off-by: Maarten Lankhorst <[email protected]>
---
 drivers/gpu/drm/i915/intel_display.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 3b6bd6e9f7ae..e496c130364d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13093,8 +13093,6 @@ static void intel_modeset_clear_plls(struct 
drm_atomic_state *state)
        struct drm_device *dev = state->dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        struct intel_shared_dpll_config *shared_dpll = NULL;
-       struct intel_crtc *intel_crtc;
-       struct intel_crtc_state *intel_crtc_state;
        struct drm_crtc *crtc;
        struct drm_crtc_state *crtc_state;
        int i;
@@ -13103,16 +13101,16 @@ static void intel_modeset_clear_plls(struct 
drm_atomic_state *state)
                return;
 
        for_each_crtc_in_state(state, crtc, crtc_state, i) {
-               int dpll;
-
-               intel_crtc = to_intel_crtc(crtc);
-               intel_crtc_state = to_intel_crtc_state(crtc_state);
-               dpll = intel_crtc_state->shared_dpll;
+               struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+               int dpll = to_intel_crtc_state(crtc->state)->shared_dpll;
 
-               if (!needs_modeset(crtc_state) || dpll == DPLL_ID_PRIVATE)
+               if (!needs_modeset(crtc_state))
                        continue;
 
-               intel_crtc_state->shared_dpll = DPLL_ID_PRIVATE;
+               to_intel_crtc_state(crtc_state)->shared_dpll = DPLL_ID_PRIVATE;
+
+               if (dpll == DPLL_ID_PRIVATE)
+                       continue;
 
                if (!shared_dpll)
                        shared_dpll = intel_atomic_get_shared_dpll_state(state);
@@ -15922,9 +15920,6 @@ void intel_display_resume(struct drm_device *dev)
 
        state->acquire_ctx = dev->mode_config.acquire_ctx;
 
-       /* preserve complete old state, including dpll */
-       intel_atomic_get_shared_dpll_state(state);
-
        for_each_crtc(dev, crtc) {
                struct drm_crtc_state *crtc_state =
                        drm_atomic_get_crtc_state(state, crtc);
-- 
2.1.0

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