The pipes that can be used for eDP MSO are limited to pipe A (and sometimes also pipe B) only for display version 20 and below.
Modify the function that returns the pipe mask for eDP MSO so that these limitations only apply to version 20 and below, enabling all pipes otherwise. Bspec: 68923 Cc: Jani Nikula <[email protected]> Cc: James Ausmus <[email protected]> Signed-off-by: Luca Coelho <[email protected]> --- drivers/gpu/drm/i915/display/intel_ddi.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 922194b957be..5c99ae148213 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2336,13 +2336,18 @@ 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)) return BIT(PIPE_A) | BIT(PIPE_B); - else + else if (DISPLAY_VER(i915) <= 20) return BIT(PIPE_A); + + return ~0; } static void intel_ddi_mso_get_config(struct intel_encoder *encoder, -- 2.39.2
