Commit dd7eb65c authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Jani Nikula
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drm/i915/mst: Reject modes that require the bigjoiner 



We have no bigjoiner support in the MST code, so .mode_valid()
pretending otherwise is just going to result black screens for
users. Reject any mode that needs the joiner.

Cc: stable@vger.kernel.org
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Fixes: d51f25eb ("drm/i915: Add DSC support to MST path")
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231127145028.4899-3-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
(cherry picked from commit 9c058492)
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 7cf82b25

drivers/gpu/drm/i915/display/intel_dp_mst.c

+4 −0
Original line number Diff line number Diff line
@@ -997,6 +997,10 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector, 
	if (intel_dp_need_bigjoiner(intel_dp, mode->hdisplay, target_clock)) {

		bigjoiner = true;

		max_dotclk *= 2;



		/* TODO: add support for bigjoiner */

		*status = MODE_CLOCK_HIGH;

		return 0;

	}



	if (DISPLAY_VER(dev_priv) >= 10 &&