These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / include / drm / drm_dp_mst_helper.h

diff --git a/kernel/include/drm/drm_dp_mst_helper.h b/kernel/include/drm/drm_dp_mst_helper.h
index 86d0b25..f356f97 100644 (file)
--- a/kernel/include/drm/drm_dp_mst_helper.h
+++ b/kernel/include/drm/drm_dp_mst_helper.h
@@ -44,8 +44,6 @@ struct drm_dp_vcpi {
 /**
  * struct drm_dp_mst_port - MST port
  * @kref: reference count for this port.
- * @guid_valid: for DP 1.2 devices if we have validated the GUID.
- * @guid: guid for DP 1.2 device on this port.
  * @port_num: port number
  * @input: if this port is an input port.
  * @mcs: message capability status - DP 1.2 spec.
@@ -70,10 +68,6 @@ struct drm_dp_vcpi {
 struct drm_dp_mst_port {
        struct kref kref;
 
-       /* if dpcd 1.2 device is on this port - its GUID info */
-       bool guid_valid;
-       u8 guid[16];
-
        u8 port_num;
        bool input;
        bool mcs;
@@ -109,10 +103,12 @@ struct drm_dp_mst_port {
  * @tx_slots: transmission slots for this device.
  * @last_seqno: last sequence number used to talk to this.
  * @link_address_sent: if a link address message has been sent to this device yet.
+ * @guid: guid for DP 1.2 branch device. port under this branch can be
+ * identified by port #.
  *
  * This structure represents an MST branch device, there is one
- * primary branch device at the root, along with any others connected
- * to downstream ports
+ * primary branch device at the root, along with any other branches connected
+ * to downstream port of parent branches.
  */
 struct drm_dp_mst_branch {
        struct kref kref;
@@ -131,6 +127,9 @@ struct drm_dp_mst_branch {
        struct drm_dp_sideband_msg_tx *tx_slots[2];
        int last_seqno;
        bool link_address_sent;
+
+       /* global unique identifier to identify branch devices */
+       u8 guid[16];
 };
 
 
@@ -253,6 +252,7 @@ struct drm_dp_remote_dpcd_write {
        u8 *bytes;
 };
 
+#define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4
 struct drm_dp_remote_i2c_read {
        u8 num_transactions;
        u8 port_number;
@@ -262,7 +262,7 @@ struct drm_dp_remote_i2c_read {
                u8 *bytes;
                u8 no_stop_bit;
                u8 i2c_transaction_delay;
-       } transactions[4];
+       } transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS];
        u8 read_i2c_device_id;
        u8 num_bytes_read;
 };
@@ -374,6 +374,7 @@ struct drm_dp_mst_topology_mgr;
 struct drm_dp_mst_topology_cbs {
        /* create a connector for a port */
        struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path);
+       void (*register_connector)(struct drm_connector *connector);
        void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr,
                                  struct drm_connector *connector);
        void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr);
@@ -403,11 +404,9 @@ struct drm_dp_payload {
  * @conn_base_id: DRM connector ID this mgr is connected to.
  * @down_rep_recv: msg receiver state for down replies.
  * @up_req_recv: msg receiver state for up requests.
- * @lock: protects mst state, primary, guid, dpcd.
+ * @lock: protects mst state, primary, dpcd.
  * @mst_state: if this manager is enabled for an MST capable port.
  * @mst_primary: pointer to the primary branch device.
- * @guid_valid: GUID valid for the primary branch device.
- * @guid: GUID for primary port.
  * @dpcd: cache of DPCD for primary port.
  * @pbn_div: PBN to slots divisor.
  *
@@ -429,13 +428,11 @@ struct drm_dp_mst_topology_mgr {
        struct drm_dp_sideband_msg_rx up_req_recv;
 
        /* pointer to info about the initial MST device */
-       struct mutex lock; /* protects mst_state + primary + guid + dpcd */
+       struct mutex lock; /* protects mst_state + primary + dpcd */
 
        bool mst_state;
        struct drm_dp_mst_branch *mst_primary;
-       /* primary MST device GUID */
-       bool guid_valid;
-       u8 guid[16];
+
        u8 dpcd[DP_RECEIVER_CAP_SIZE];
        u8 sink_count;
        int pbn_div;
@@ -448,9 +445,7 @@ struct drm_dp_mst_topology_mgr {
           the mstb tx_slots and txmsg->state once they are queued */
        struct mutex qlock;
        struct list_head tx_msg_downq;
-       struct list_head tx_msg_upq;
        bool tx_down_in_progress;
-       bool tx_up_in_progress;
 
        /* payload info + lock for it */
        struct mutex payload_lock;