drm/xe/display: Use a single early init call for display

Now that interrupts are disabled for xe_display_init_noaccel,
both xe_display_init_noirq and xe_display_init_noaccel run in the same
context.

This means that we can get rid of the 3 different init calls. Without
interrupts, nothing is touching display up to this point.
Unify those 3 early display calls into a single xe_display_init_early(),
this makes the init sequence cleaner, and display less tangled during
init.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250121142850.4960-3-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>

Author: Maarten Lankhorst

drivers/gpu/drm/xe/display/xe_display.c

@@ -101,19 +101,25 @@ int xe_display_create(struct xe_device *xe)
 	return drmm_add_action_or_reset(&xe->drm, display_destroy, NULL);
 }
 
-static void xe_display_fini_nommio(struct drm_device *dev, void *dummy)
+static void xe_display_fini_early(void *arg)
 {
-	struct xe_device *xe = to_xe_device(dev);
+	struct xe_device *xe = arg;
 	struct intel_display *display = &xe->display;
 
 	if (!xe->info.probe_display)
 		return;
 
+	intel_display_driver_remove_nogem(display);
+	intel_display_driver_remove_noirq(display);
+	intel_opregion_cleanup(display);
 	intel_power_domains_cleanup(display);
 }
 
-int xe_display_init_nommio(struct xe_device *xe)
+int xe_display_init_early(struct xe_device *xe)
 {
+	struct intel_display *display = &xe->display;
+	int err;
+
 	if (!xe->info.probe_display)
 		return 0;
 
@@ -123,29 +129,6 @@ int xe_display_init_nommio(struct xe_device *xe)
 	/* This must be called before any calls to HAS_PCH_* */
 	intel_detect_pch(xe);
 
-	return drmm_add_action_or_reset(&xe->drm, xe_display_fini_nommio, xe);
-}
-
-static void xe_display_fini_noirq(void *arg)
-{
-	struct xe_device *xe = arg;
-	struct intel_display *display = &xe->display;
-
-	if (!xe->info.probe_display)
-		return;
-
-	intel_display_driver_remove_noirq(display);
-	intel_opregion_cleanup(display);
-}
-
-int xe_display_init_noirq(struct xe_device *xe)
-{
-	struct intel_display *display = &xe->display;
-	int err;
-
-	if (!xe->info.probe_display)
-		return 0;
-
 	intel_display_driver_early_probe(display);
 
 	/* Early display init.. */
@@ -162,38 +145,20 @@ int xe_display_init_noirq(struct xe_device *xe)
 	intel_display_device_info_runtime_init(display);
 
 	err = intel_display_driver_probe_noirq(display);
-	if (err) {
-		intel_opregion_cleanup(display);
-		return err;
-	}
-
-	return devm_add_action_or_reset(xe->drm.dev, xe_display_fini_noirq, xe);
-}
-
-static void xe_display_fini_noaccel(void *arg)
-{
-	struct xe_device *xe = arg;
-	struct intel_display *display = &xe->display;
-
-	if (!xe->info.probe_display)
-		return;
-
-	intel_display_driver_remove_nogem(display);
-}
-
-int xe_display_init_noaccel(struct xe_device *xe)
-{
-	struct intel_display *display = &xe->display;
-	int err;
-
-	if (!xe->info.probe_display)
-		return 0;
+	if (err)
+		goto err_opregion;
 
 	err = intel_display_driver_probe_nogem(display);
 	if (err)
-		return err;
+		goto err_noirq;
 
-	return devm_add_action_or_reset(xe->drm.dev, xe_display_fini_noaccel, xe);
+	return devm_add_action_or_reset(xe->drm.dev, xe_display_fini_early, xe);
+err_noirq:
+	intel_display_driver_remove_noirq(display);
+	intel_power_domains_cleanup(display);
+err_opregion:
+	intel_opregion_cleanup(display);
+	return err;
 }
 
 int xe_display_init(struct xe_device *xe)

drivers/gpu/drm/xe/display/xe_display.h

@@ -20,9 +20,7 @@ int xe_display_create(struct xe_device *xe);
 
 int xe_display_probe(struct xe_device *xe);
 
-int xe_display_init_nommio(struct xe_device *xe);
-int xe_display_init_noirq(struct xe_device *xe);
-int xe_display_init_noaccel(struct xe_device *xe);
+int xe_display_init_early(struct xe_device *xe);
 int xe_display_init(struct xe_device *xe);
 void xe_display_fini(struct xe_device *xe);
 
@@ -54,9 +52,7 @@ 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_nommio(struct xe_device *xe) { return 0; }
-static inline int xe_display_init_noirq(struct xe_device *xe) { return 0; }
-static inline int xe_display_init_noaccel(struct xe_device *xe) { return 0; }
+static inline int xe_display_init_early(struct xe_device *xe) { return 0; }
 static inline int xe_display_init(struct xe_device *xe) { return 0; }
 static inline void xe_display_fini(struct xe_device *xe) {}
 

drivers/gpu/drm/xe/xe_device.c

@@ -752,10 +752,6 @@ int xe_device_probe(struct xe_device *xe)
 		return err;
 
 	xe->info.mem_region_mask = 1;
-	err = xe_display_init_nommio(xe);
-	if (err)
-		return err;
-
 	err = xe_set_dma_info(xe);
 	if (err)
 		return err;
@@ -810,10 +806,6 @@ int xe_device_probe(struct xe_device *xe)
 	if (err)
 		return err;
 
-	err = xe_display_init_noirq(xe);
-	if (err)
-		return err;
-
 	err = probe_has_flat_ccs(xe);
 	if (err)
 		goto err;
@@ -837,7 +829,7 @@ int xe_device_probe(struct xe_device *xe)
 	 * This is the reason the first allocation needs to be done
 	 * inside display.
 	 */
-	err = xe_display_init_noaccel(xe);
+	err = xe_display_init_early(xe);
 	if (err)
 		goto err;