drm/dp/mst: Provide defines for ACK vs. NAK reply type

Make the code a bit easier to read by providing symbolic names
for the reply_type (ACK vs. NAK). Also clean up some brace stuff
while at it.

v2: s/DP_REPLY/DP_SIDEBAND_REPLY/ (DK)
    Fix some checkpatch issues

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190122200301.18633-1-ville.syrjala@linux.intel.com

1 files changed, 4 insertions, 0 deletions

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index c223c87ef119..a62d3750663a 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -992,6 +992,10 @@
 #define DP_SINK_EVENT_NOTIFY            0x30
 #define DP_QUERY_STREAM_ENC_STATUS      0x38
 
+/* DP 1.2 MST sideband reply types */
+#define DP_SIDEBAND_REPLY_ACK           0x00
+#define DP_SIDEBAND_REPLY_NAK           0x01
+
 /* DP 1.2 MST sideband nak reasons - table 2.84 */
 #define DP_NAK_WRITE_FAILURE            0x01
 #define DP_NAK_INVALID_READ             0x02