Revert "drm/i915: Make intel_display_suspend atomic, v2."

This reverts commit 490f400db5d886fc28566af69b02f6497f31be4b.

We're not ready yet to make it atomic, we calculate some state in
advance, but without atomic plane support atomic the hw readout will
fail.

It's required to revert this commit to revert the atomic hw
state readout patch.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90868
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90861
Signed-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/i915_drv.c

@@ -634,9 +634,6 @@ static int i915_drm_suspend(struct drm_device *dev)
 	intel_display_suspend(dev);
 	drm_modeset_unlock_all(dev);
 
-	/* suspending displays will unsets init power */
-	intel_display_set_init_power(dev_priv, true);
-
 	intel_dp_mst_suspend(dev);
 
 	intel_runtime_pm_disable_interrupts(dev_priv);

drivers/gpu/drm/i915/intel_display.c

@@ -6191,58 +6191,27 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
  * turn all crtc's off, but do not adjust state
  * This has to be paired with a call to intel_modeset_setup_hw_state.
  */
-int intel_display_suspend(struct drm_device *dev)
+void intel_display_suspend(struct drm_device *dev)
 {
-	struct drm_mode_config *config = &dev->mode_config;
-	struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;
-	struct drm_atomic_state *state;
+	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct drm_crtc *crtc;
-	unsigned crtc_mask = 0;
-	int ret = 0;
-
-	if (WARN_ON(!ctx))
-		return 0;
-
-	lockdep_assert_held(&ctx->ww_ctx);
-	state = drm_atomic_state_alloc(dev);
-	if (WARN_ON(!state))
-		return -ENOMEM;
-
-	state->acquire_ctx = ctx;
-	state->allow_modeset = true;
 
 	for_each_crtc(dev, crtc) {
-		struct drm_crtc_state *crtc_state =
-			drm_atomic_get_crtc_state(state, crtc);
-
-		ret = PTR_ERR_OR_ZERO(crtc_state);
-		if (ret)
-			goto free;
+		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+		enum intel_display_power_domain domain;
+		unsigned long domains;
 
-		if (!crtc_state->active)
+		if (!intel_crtc->active)
 			continue;
 
-		crtc_state->active = false;
-		crtc_mask |= 1 << drm_crtc_index(crtc);
-	}
-
-	if (crtc_mask) {
-		ret = intel_set_mode(state);
-
-		if (!ret) {
-			for_each_crtc(dev, crtc)
-				if (crtc_mask & (1 << drm_crtc_index(crtc)))
-					crtc->state->active = true;
+		intel_crtc_disable_planes(crtc);
+		dev_priv->display.crtc_disable(crtc);
 
-			return ret;
-		}
+		domains = intel_crtc->enabled_power_domains;
+		for_each_power_domain(domain, domains)
+			intel_display_power_put(dev_priv, domain);
+		intel_crtc->enabled_power_domains = 0;
 	}
-
-free:
-	if (ret)
-		DRM_ERROR("Suspending crtc's failed with %i\n", ret);
-	drm_atomic_state_free(state);
-	return ret;
 }
 
 /* Master function to enable/disable CRTC and corresponding power wells */

drivers/gpu/drm/i915/intel_drv.h

@@ -992,7 +992,7 @@ int intel_pch_rawclk(struct drm_device *dev);
 void intel_mark_busy(struct drm_device *dev);
 void intel_mark_idle(struct drm_device *dev);
 void intel_crtc_restore_mode(struct drm_crtc *crtc);
-int intel_display_suspend(struct drm_device *dev);
+void intel_display_suspend(struct drm_device *dev);
 int intel_crtc_control(struct drm_crtc *crtc, bool enable);
 void intel_crtc_update_dpms(struct drm_crtc *crtc);
 void intel_encoder_destroy(struct drm_encoder *encoder);