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drm/i915/sdvo: Grab mode_config.mutex during LVDS init to avoid WARNs

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[ Upstream commit 12caf46cf4 ]

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: stable@vger.kernel.org
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7301
Fixes: aa2b88074a ("drm/i915/sdvo: Fix multi function encoder stuff")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221026101134.20865-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit a3cd4f4472)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ville Syrjälä 2022-10-26 13:11:29 +03:00 committed by Greg Kroah-Hartman
parent 72be4e4107
commit 9482bd7002
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/display/intel_sdvo.c
View file

@ -2900,8 +2900,12 @@ 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);