[Intel-gfx] [PATCH] drm/i915/adl_p: enable MSO on pipe B

[Jani Nikula]

On ADL-P, it's possible to enable the stream splitter on pipe B in
addition to pipe A.

Bspec: 50174
Cc: Uma Shankar <uma.shankar at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 3d8918674153..4d6f1a206f56 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4729,9 +4729,12 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 
 		dig_port->hpd_pulse = intel_dp_hpd_pulse;
 
-		/* Splitter enable for eDP MSO is supported for pipe A only. */
-		if (dig_port->dp.mso_link_count)
+		/* Splitter enable for eDP MSO is limited to certain pipes. */
+		if (dig_port->dp.mso_link_count) {
 			encoder->pipe_mask = BIT(PIPE_A);
+			if (IS_ALDERLAKE_P(dev_priv))
+				encoder->pipe_mask |= BIT(PIPE_B);
+		}
 	}
 
 	/* In theory we don't need the encoder->type check, but leave it just in
-- 
2.20.1