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drm/i915/sdvo: Grab mode_config.mutex during LVDS init to avoid WARNs
[ Upstream commit 12caf46 ] 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: aa2b880 ("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 a3cd4f4) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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