drm/dp_mst: Combine redundant cases in drm_dp_encode_sideband_req()

Noticed this while working on adding a drm_dp_decode_sideband_req().
DP_POWER_DOWN_PHY/DP_POWER_UP_PHY both use the same struct as
DP_ENUM_PATH_RESOURCES, so we can just combine their cases.

Changes since v2:
* Fix commit message

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Juston Li <juston.li@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Harry Wentland <hwentlan@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190903215702.16984-1-lyude@redhat.com

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 625743c..bdcdd37 100644 (file)
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -271,6 +271,8 @@ static void drm_dp_encode_sideband_req(struct drm_dp_sideband_msg_req_body *req,
 
        switch (req->req_type) {
        case DP_ENUM_PATH_RESOURCES:
+       case DP_POWER_DOWN_PHY:
+       case DP_POWER_UP_PHY:
                buf[idx] = (req->u.port_num.port_number & 0xf) << 4;
                idx++;
                break;
@@ -358,12 +360,6 @@ static void drm_dp_encode_sideband_req(struct drm_dp_sideband_msg_req_body *req,
                memcpy(&buf[idx], req->u.i2c_write.bytes, req->u.i2c_write.num_bytes);
                idx += req->u.i2c_write.num_bytes;
                break;
-
-       case DP_POWER_DOWN_PHY:
-       case DP_POWER_UP_PHY:
-               buf[idx] = (req->u.port_num.port_number & 0xf) << 4;
-               idx++;
-               break;
        }
        raw->cur_len = idx;
 }