From: Ville Syrjälä <[email protected]>

drm_mode_probed_add() is unhappy about being called w/o
mode_config.mutex. Grab it during LVDS fixed mode setup
to silence the WARNs.

Cc: [email protected]
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7301
Fixes: aa2b88074a56 ("drm/i915/sdvo: Fix multi function encoder stuff")
Signed-off-by: Ville Syrjälä <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_sdvo.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c 
b/drivers/gpu/drm/i915/display/intel_sdvo.c
index ccf81d616cb4..1eaaa7ec580e 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -2899,8 +2899,12 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int 
device)
        intel_panel_add_vbt_sdvo_fixed_mode(intel_connector);
 
        if (!intel_panel_preferred_fixed_mode(intel_connector)) {
+               mutex_lock(&i915->drm.mode_config.mutex);
+
                intel_ddc_get_modes(connector, &intel_sdvo->ddc);
                intel_panel_add_edid_fixed_modes(intel_connector, false);
+
+               mutex_unlock(&i915->drm.mode_config.mutex);
        }
 
        intel_panel_init(intel_connector);
-- 
2.37.4

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