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usb: typec: altmodes/displayport: Fall back to multi-func pins
If our port-partner supports both DP-only operation (pin-assignment C) and multi-func operation (pin-assignment D) and we only support pin-assignment D and the port-partner prefers DP-only mode, then before this commit we would and up masking out pin-assignment D from the available pin-assignments and fail to pick a pin-assignment. Instead only mask out the multi-func pin-assignments if we support dp-only pin-assignments, so that we correctly fall-back to a multi-func pin-assignment in this case (by picking pin-assignment D). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -100,7 +100,7 @@ static int dp_altmode_configure(struct dp_altmode *dp, u8 con)
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if (dp->data.status & DP_STATUS_PREFER_MULTI_FUNC &&
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pin_assign & DP_PIN_ASSIGN_MULTI_FUNC_MASK)
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pin_assign &= DP_PIN_ASSIGN_MULTI_FUNC_MASK;
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else
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else if (pin_assign & DP_PIN_ASSIGN_DP_ONLY_MASK)
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pin_assign &= DP_PIN_ASSIGN_DP_ONLY_MASK;
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if (!pin_assign)
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