5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jani Nikula jani.nikula@intel.com
commit 49cc17967be95d64606d5684416ee51eec35e84a upstream.
It's not possible to use the joiner at the same time with eDP MSO. When a panel needs MSO, it's not optional, so MSO trumps joiner.
v3: Only change intel_dp_has_joiner(), leave debugfs alone (Ville)
Fixes: bc71194e8897 ("drm/i915/edp: enable eDP MSO during link training") Cc: stable@vger.kernel.org # v5.13+ Cc: Ville Syrjala ville.syrjala@linux.intel.com Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1668 Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20240614142311.589089-1-jani.n... Signed-off-by: Jani Nikula jani.nikula@intel.com (cherry picked from commit 8b5a92ca24eb96bb71e2a55e352687487d87687f) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/intel_dp.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -226,6 +226,10 @@ bool intel_dp_can_bigjoiner(struct intel struct intel_encoder *encoder = &intel_dig_port->base; struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ /* eDP MSO is not compatible with joiner */ + if (intel_dp->mso_link_count) + return false; + return DISPLAY_VER(dev_priv) >= 12 || (DISPLAY_VER(dev_priv) == 11 && encoder->port != PORT_A);