From: Adam Jackson <ajax@redhat.com>
Date: Mon, 14 May 2012 20:05:46 +0000 (-0400)
Subject: drm/dp: Add DPCD defines for register 0x007
X-Git-Tag: Ubuntu-snapdragon-4.4.0-1029.32~13219^2~18
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=de44d97193fc67c1636c614fc302945e2912da1f;p=mirror_ubuntu-zesty-kernel.git

drm/dp: Add DPCD defines for register 0x007

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>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 8ed85b96487d..1744b18c06b3 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