[PATCH v2] drm/i915: update eDP MSO pipe mask for newer platforms

[Luca Coelho]

Starting from display version 14, pipes A and B are supported in eDP
MSO.  After display version 20 there are no restrictions.

Update the function that returns the pipe mask for eDP MSO
accordingly.

Bspec: 68923, 55473
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: James Ausmus <james.ausmus at intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa at intel.com>
Signed-off-by: Luca Coelho <luciano.coelho at intel.com>
---

In v2:
   * allow pipes A and B from ver 14 to 20 [Gustavo]


drivers/gpu/drm/i915/display/intel_ddi.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 922194b957be..29a616a8e72d 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -2336,13 +2336,20 @@ static void intel_ddi_power_up_lanes(struct intel_encoder *encoder,
 	}
 }
 
-/* Splitter enable for eDP MSO is limited to certain pipes. */
+/*
+ * Splitter enable for eDP MSO is limited to certain pipes on certain
+ * platforms.
+ */
 static u8 intel_ddi_splitter_pipe_mask(struct drm_i915_private *i915)
 {
-	if (IS_ALDERLAKE_P(i915))
+
+	if (IS_ALDERLAKE_P(i915) ||
+	    IS_DISPLAY_IP_RANGE(i915, IP_VER(14, 0), IP_VER(20, 0)))
 		return BIT(PIPE_A) | BIT(PIPE_B);
-	else
+	else if (DISPLAY_VER(i915) < 14)
 		return BIT(PIPE_A);
+
+	return ~0;
 }
 
 static void intel_ddi_mso_get_config(struct intel_encoder *encoder,
-- 
2.39.2