[PATCH 5/7] drm/xe/display: move xe->display initialization to xe_display_probe()

[Jani Nikula]

The future goal is to have intel_display_device_probe() create struct
intel_display. As the first step, postpone xe->display initialization
right before that call. This is the same location as in i915.

There's a subtle functional change here: xe->display will now be
initialized only if xe->info.probe_display.

The xe_display_create() function becomes empty, and can be removed. Move
its documentation to xe_display_probe()

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/xe/display/xe_display.c | 33 +++++++++++--------------
 drivers/gpu/drm/xe/display/xe_display.h |  4 ---
 drivers/gpu/drm/xe/xe_device.c          |  4 ---
 3 files changed, 14 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/xe/display/xe_display.c b/drivers/gpu/drm/xe/display/xe_display.c
index b0f5624177bd..c35444637620 100644
--- a/drivers/gpu/drm/xe/display/xe_display.c
+++ b/drivers/gpu/drm/xe/display/xe_display.c
@@ -83,25 +83,6 @@ static void unset_display_features(struct xe_device *xe)
 	xe->drm.driver_features &= ~(DRIVER_MODESET | DRIVER_ATOMIC);
 }
 
-/**
- * xe_display_create - create display struct
- * @xe: XE device instance
- *
- * Initialize all fields used by the display part.
- *
- * TODO: once everything can be inside a single struct, make the struct opaque
- * to the rest of xe and return it to be xe->display.
- *
- * Returns: 0 on success
- */
-int xe_display_create(struct xe_device *xe)
-{
-	/* TODO: Allocate display dynamically. */
-	xe->display = &xe->__display;
-
-	return 0;
-}
-
 static void xe_display_fini_early(void *arg)
 {
 	struct xe_device *xe = arg;
@@ -524,6 +505,17 @@ static void display_device_remove(struct drm_device *dev, void *arg)
 	intel_display_device_remove(display);
 }
 
+/**
+ * xe_display_probe - probe display and create display struct
+ * @xe: XE device instance
+ *
+ * Initialize all fields used by the display part.
+ *
+ * TODO: once everything can be inside a single struct, make the struct opaque
+ * to the rest of xe and return it to be xe->display.
+ *
+ * Returns: 0 on success
+ */
 int xe_display_probe(struct xe_device *xe)
 {
 	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
@@ -533,6 +525,9 @@ int xe_display_probe(struct xe_device *xe)
 	if (!xe->info.probe_display)
 		goto no_display;
 
+	/* TODO: Allocate display dynamically. */
+	xe->display = &xe->__display;
+
 	display = intel_display_device_probe(pdev);
 
 	err = drmm_add_action_or_reset(&xe->drm, display_device_remove, display);
diff --git a/drivers/gpu/drm/xe/display/xe_display.h b/drivers/gpu/drm/xe/display/xe_display.h
index 46e14f8dee28..e533aa4750bc 100644
--- a/drivers/gpu/drm/xe/display/xe_display.h
+++ b/drivers/gpu/drm/xe/display/xe_display.h
@@ -15,8 +15,6 @@ struct drm_driver;
 bool xe_display_driver_probe_defer(struct pci_dev *pdev);
 void xe_display_driver_set_hooks(struct drm_driver *driver);
 
-int xe_display_create(struct xe_device *xe);
-
 int xe_display_probe(struct xe_device *xe);
 
 int xe_display_init_early(struct xe_device *xe);
@@ -46,8 +44,6 @@ static inline int xe_display_driver_probe_defer(struct pci_dev *pdev) { return 0
 static inline void xe_display_driver_set_hooks(struct drm_driver *driver) { }
 static inline void xe_display_driver_remove(struct xe_device *xe) {}
 
-static inline int xe_display_create(struct xe_device *xe) { return 0; }
-
 static inline int xe_display_probe(struct xe_device *xe) { return 0; }
 
 static inline int xe_display_init_early(struct xe_device *xe) { return 0; }
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index d4b6e623aa48..660b0c5126dc 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -491,10 +491,6 @@ struct xe_device *xe_device_create(struct pci_dev *pdev,
 	if (err)
 		goto err;
 
-	err = xe_display_create(xe);
-	if (WARN_ON(err))
-		goto err;
-
 	return xe;
 
 err:
-- 
2.39.5