[PATCH 2/5] drm/dp: Add DPCD defines for register 0x007

[Adam Jackson <ajax@redhat.com>]

Low four bits are downstream port count.  High bit indicates peer OUI
support.  OUI matching will allow us to do additional per-sink handling
for things like DP->VGA bandwidth limits or (hopefully) the iMac-as-
display hack.

Signed-off-by: Adam Jackson <ajax@redhat.com>
---
 include/drm/drm_dp_helper.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 8ed85b9..1744b18c 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -72,6 +72,10 @@
 
 #define DP_MAIN_LINK_CHANNEL_CODING         0x006
 
+#define DP_DOWN_STREAM_PORT_COUNT	    0x007
+#define  DP_PORT_COUNT_MASK		    0x0f
+#define  DP_OUI_SUPPORT			    (1 << 7)
+
 #define DP_EDP_CONFIGURATION_CAP            0x00d
 #define DP_TRAINING_AUX_RD_INTERVAL         0x00e
 
-- 
1.7.7.6