[PATCH v2 8/8] drm/i915/reset: add modeset_stuck callback to intel_display_reset_prepare()

[Jani Nikula <jani.nikula@xxxxxxxxx>]

Drop the dependency on gt by providing a callback for trying to unbreak
stuck modeset. Do intel_gt_set_wedged() via the callback.

It's by no means pretty, but this is perhaps the most straightforward
alternative.

Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_display_reset.c | 6 +++---
 drivers/gpu/drm/i915/display/intel_display_reset.h | 5 ++++-
 drivers/gpu/drm/i915/gt/intel_reset.c              | 7 ++++++-
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_reset.c b/drivers/gpu/drm/i915/display/intel_display_reset.c
index aafee2df6501..8ef86c896158 100644
--- a/drivers/gpu/drm/i915/display/intel_display_reset.c
+++ b/drivers/gpu/drm/i915/display/intel_display_reset.c
@@ -19,9 +19,9 @@ bool intel_display_reset_test(struct intel_display *display)
 	return display->params.force_reset_modeset_test;
 }
 
-void intel_display_reset_prepare(struct intel_display *display)
+void intel_display_reset_prepare(struct intel_display *display,
+				 modeset_stuck_fn modeset_stuck, void *context)
 {
-	struct drm_i915_private *dev_priv = to_i915(display->drm);
 	struct drm_modeset_acquire_ctx *ctx = &display->restore.reset_ctx;
 	struct drm_atomic_state *state;
 	int ret;
@@ -32,7 +32,7 @@ void intel_display_reset_prepare(struct intel_display *display)
 	if (atomic_read(&display->restore.pending_fb_pin)) {
 		drm_dbg_kms(display->drm,
 			    "Modeset potentially stuck, unbreaking through wedging\n");
-		intel_gt_set_wedged(to_gt(dev_priv));
+		modeset_stuck(context);
 	}
 
 	/*
diff --git a/drivers/gpu/drm/i915/display/intel_display_reset.h b/drivers/gpu/drm/i915/display/intel_display_reset.h
index 985766cde001..053c3e90ac77 100644
--- a/drivers/gpu/drm/i915/display/intel_display_reset.h
+++ b/drivers/gpu/drm/i915/display/intel_display_reset.h
@@ -10,8 +10,11 @@
 
 struct intel_display;
 
+typedef void modeset_stuck_fn(void *context);
+
 bool intel_display_reset_test(struct intel_display *display);
-void intel_display_reset_prepare(struct intel_display *display);
+void intel_display_reset_prepare(struct intel_display *display,
+				 modeset_stuck_fn modeset_stuck, void *context);
 void intel_display_reset_finish(struct intel_display *display, bool test_only);
 
 #endif /* __INTEL_RESET_H__ */
diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index 2ca12bbf168f..84a8ca167a4e 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -1405,6 +1405,11 @@ static bool gt_reset_clobbers_display(struct intel_gt *gt)
 	return intel_gt_gpu_reset_clobbers_display(gt) && intel_has_gpu_reset(gt);
 }
 
+static void display_reset_modeset_stuck(void *gt)
+{
+	intel_gt_set_wedged(gt);
+}
+
 static void display_reset_prepare(struct intel_gt *gt)
 {
 	struct drm_i915_private *i915 = gt->i915;
@@ -1419,7 +1424,7 @@ static void display_reset_prepare(struct intel_gt *gt)
 	smp_mb__after_atomic();
 	wake_up_bit(&gt->reset.flags, I915_RESET_MODESET);
 
-	intel_display_reset_prepare(display);
+	intel_display_reset_prepare(display, display_reset_modeset_stuck, gt);
 }
 
 static void display_reset_finish(struct intel_gt *gt)
-- 
2.39.5