[Intel-gfx] [PATCH] drm/i915/display: Go softly softly on initial modeset failure

[Chris Wilson]

Reduce the module/device probe error into a mere debug to hide issues
where the initial modeset is failing (after lies told by hw probe) and
the system hangs with a livelock in cleaning up the failed commit.

Reported-by: H.J. Lu <hjl.tools at gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=210619
Fixes: b3bf99daaee9 ("drm/i915/display: Defer initial modeset until after GGTT is initialised")
Fixes: ccc9e67ab26f ("drm/i915/display: Defer initial modeset until after GGTT is initialised")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: "Ville Syrjälä" <ville.syrjala at linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: H.J. Lu <hjl.tools at gmail.com>
Cc: Dave Airlie <airlied at redhat.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index c567c0cada7e..761be8deaa9b 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -18755,7 +18755,7 @@ int intel_modeset_init(struct drm_i915_private *i915)
 	 */
 	ret = intel_initial_commit(&i915->drm);
 	if (ret)
-		return ret;
+		drm_dbg_kms(&i915->drm, "Initial modeset failed, %d\n", ret);
 
 	intel_overlay_setup(i915);
 
-- 
2.20.1