From: Ville Syrjälä Date: Mon, 27 Nov 2023 14:50:27 +0000 (+0200) Subject: drm/i915/mst: Reject modes that require the bigjoiner X-Git-Tag: v6.6.7~71 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a0396af35ca2010a129dda039fdf71358d5035be;p=platform%2Fkernel%2Flinux-starfive.git drm/i915/mst: Reject modes that require the bigjoiner commit dd7eb65c493615fda7d459501c3d4a46e00ea5ba upstream. 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 Fixes: d51f25eb479a ("drm/i915: Add DSC support to MST path") Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20231127145028.4899-3-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula (cherry picked from commit 9c058492b16f90bb772cb0dad567e8acc68e155d) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index ccea5ea..7a3d024 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -955,6 +955,10 @@ 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 &&