[Intel-gfx] [PATCH 2/4] drm/i915: Prepare to track new pipe config per pipe

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Add a new_config pointer to intel_crtc which will point to the new pipe
config for said crtc while intel_crtc.config will still contain the old
config during first parts of the modeset operation. This is a step
towards having the entire new state available during the compute phase,
so that we can make accurate decisions about global resource usage.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 5 +++++
 drivers/gpu/drm/i915/intel_drv.h     | 1 +
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7020b7b..5861975 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9187,6 +9187,7 @@ intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
 	list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
 			    base.head) {
 		WARN_ON(intel_crtc->base.enabled != intel_crtc_in_use(&intel_crtc->base));
+		WARN_ON(intel_crtc->new_config != &intel_crtc->config);
 	}
 
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
@@ -9620,6 +9621,7 @@ static int __intel_set_mode(struct drm_crtc *crtc,
 		}
 		intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,
 				       "[modeset]");
+		to_intel_crtc(crtc)->new_config = pipe_config;
 	}
 
 	/*
@@ -9653,6 +9655,7 @@ static int __intel_set_mode(struct drm_crtc *crtc,
 		/* mode_set/enable/disable functions rely on a correct pipe
 		 * config. */
 		to_intel_crtc(crtc)->config = *pipe_config;
+		to_intel_crtc(crtc)->new_config = &to_intel_crtc(crtc)->config;
 	}
 
 	/* Only after disabling all output pipelines that will be changed can we
@@ -10226,6 +10229,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
 	dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
 
+	intel_crtc->new_config = &intel_crtc->config;
+
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 7f55290..d538657 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -359,6 +359,7 @@ struct intel_crtc {
 	bool cursor_visible;
 
 	struct intel_crtc_config config;
+	struct intel_crtc_config *new_config;
 	bool new_enabled;
 
 	uint32_t ddi_pll_sel;
-- 
1.8.3.2