Add DPCD register definitions for eDP 1.4 Multi-SST Operation.

Cc: Nischal Varide <nischal.var...@intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
 include/drm/drm_dp_helper.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index edffd1dcca3e..632ad7faa006 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1016,6 +1016,11 @@ struct drm_device;
 #define DP_EDP_REGIONAL_BACKLIGHT_BASE      0x740    /* eDP 1.4 */
 #define DP_EDP_REGIONAL_BACKLIGHT_0        0x741    /* eDP 1.4 */
 
+#define DP_EDP_MSO_LINK_CAPABILITIES        0x7a4    /* eDP 1.4 */
+# define DP_EDP_MSO_NUMBER_OF_LINKS_MASK    (7 << 0)
+# define DP_EDP_MSO_NUMBER_OF_LINKS_SHIFT   0
+# define DP_EDP_MSO_INDEPENDENT_LINK_BIT    (1 << 3)
+
 /* Sideband MSG Buffers */
 #define DP_SIDEBAND_MSG_DOWN_REQ_BASE      0x1000   /* 1.2 MST */
 #define DP_SIDEBAND_MSG_UP_REP_BASE        0x1200   /* 1.2 MST */
-- 
2.20.1

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