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@xxxxxxxxxx> --- 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 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
