Revert "drm/i915: Read hw state into an atomic state struct, v2."

This reverts commit 3bae26eb2991c00670df377cf6c3bc2b0577e82a.

Seems it introduces regressions for 3 different reasons, oh boy..

In bug #90868 as I can see the atomic state will be restored on
resume without the planes being set up properly. Because plane
setup here requires the atomic state, we'll have to settle
for committing atomic planes first.

In bug #90861 the failure appears to affect mostly DP devices,
and happens because reading out the atomic state prevents a modeset
on boot, which would require better hw state readout.

In bug #90874 it's shown that cdclk should be part of the atomic
state, so only performing a single modeset during resume excarbated
the issue.

It's better to fix those issues first, and then commit this patch,
so do that temporarily.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90868
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90861
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90874Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/intel_atomic.c

@@ -395,7 +395,7 @@ int intel_atomic_setup_scalers(struct drm_device *dev,
 	return 0;
 }
 
-void
+static void
 intel_atomic_duplicate_dpll_state(struct drm_i915_private *dev_priv,
 				  struct intel_shared_dpll_config *shared_dpll)
 {

drivers/gpu/drm/i915/intel_drv.h

@@ -130,6 +130,11 @@ struct intel_fbdev {
 
 struct intel_encoder {
 	struct drm_encoder base;
+	/*
+	 * The new crtc this encoder will be driven from. Only differs from
+	 * base->crtc while a modeset is in progress.
+	 */
+	struct intel_crtc *new_crtc;
 
 	enum intel_output_type type;
 	unsigned int cloneable;
@@ -190,6 +195,12 @@ struct intel_connector {
 	 */
 	struct intel_encoder *encoder;
 
+	/*
+	 * The new encoder this connector will be driven. Only differs from
+	 * encoder while a modeset is in progress.
+	 */
+	struct intel_encoder *new_encoder;
+
 	/* Reads out the current hw, returning true if the connector is enabled
 	 * and active (i.e. dpms ON state). */
 	bool (*get_hw_state)(struct intel_connector *);
@@ -527,6 +538,7 @@ struct intel_crtc {
 
 	struct intel_initial_plane_config plane_config;
 	struct intel_crtc_state *config;
+	bool new_enabled;
 
 	/* reset counter value when the last flip was submitted */
 	unsigned int reset_counter;
@@ -1407,8 +1419,6 @@ struct drm_atomic_state *intel_atomic_state_alloc(struct drm_device *dev);
 void intel_atomic_state_clear(struct drm_atomic_state *);
 struct intel_shared_dpll_config *
 intel_atomic_get_shared_dpll_state(struct drm_atomic_state *s);
-void intel_atomic_duplicate_dpll_state(struct drm_i915_private *,
-				       struct intel_shared_dpll_config *);
 
 static inline struct intel_crtc_state *
 intel_atomic_get_crtc_state(struct drm_atomic_state *state,