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26 #include "dmub/dmub_srv_stat.h"
27 #include "dmub/inc/dmub_cmd.h"
30 * DOC: DMUB_SRV STAT Interface
32 * These interfaces are called without acquiring DAL and DC locks.
33 * Hence, there is limitations on whese interfaces can access. Only
34 * variables exclusively defined for these interfaces can be modified.
38 * dmub_srv_stat_get_notification - Retrieves a dmub outbox notification, set up dmub notification
39 * structure with message information. Also a pending bit if queue
40 * is having more notifications
41 * @dmub: dmub srv structure
42 * @notify: dmub notification structure to be filled up
44 * Returns: dmub_status
46 enum dmub_status dmub_srv_stat_get_notification(struct dmub_srv *dmub,
47 struct dmub_notification *notify)
50 * This function is called without dal and dc locks, so
51 * we shall not modify any dmub variables, only dmub->outbox1_rb
52 * is exempted as it is exclusively accessed by this function
54 union dmub_rb_out_cmd cmd = {0};
57 notify->type = DMUB_NOTIFICATION_NO_DATA;
58 notify->pending_notification = false;
59 return DMUB_STATUS_INVALID;
62 /* Get write pointer which is updated by dmub */
63 dmub->outbox1_rb.wrpt = dmub->hw_funcs.get_outbox1_wptr(dmub);
65 if (!dmub_rb_out_front(&dmub->outbox1_rb, &cmd)) {
66 notify->type = DMUB_NOTIFICATION_NO_DATA;
67 notify->pending_notification = false;
68 return DMUB_STATUS_OK;
71 switch (cmd.cmd_common.header.type) {
72 case DMUB_OUT_CMD__DP_AUX_REPLY:
73 notify->type = DMUB_NOTIFICATION_AUX_REPLY;
74 notify->link_index = cmd.dp_aux_reply.control.instance;
75 notify->result = cmd.dp_aux_reply.control.result;
76 dmub_memcpy((void *)¬ify->aux_reply,
77 (void *)&cmd.dp_aux_reply.reply_data, sizeof(struct aux_reply_data));
79 case DMUB_OUT_CMD__DP_HPD_NOTIFY:
80 if (cmd.dp_hpd_notify.hpd_data.hpd_type == DP_HPD) {
81 notify->type = DMUB_NOTIFICATION_HPD;
82 notify->hpd_status = cmd.dp_hpd_notify.hpd_data.hpd_status;
84 notify->type = DMUB_NOTIFICATION_HPD_IRQ;
87 notify->link_index = cmd.dp_hpd_notify.hpd_data.instance;
88 notify->result = AUX_RET_SUCCESS;
90 case DMUB_OUT_CMD__SET_CONFIG_REPLY:
91 notify->type = DMUB_NOTIFICATION_SET_CONFIG_REPLY;
92 notify->link_index = cmd.set_config_reply.set_config_reply_control.instance;
93 notify->sc_status = cmd.set_config_reply.set_config_reply_control.status;
96 notify->type = DMUB_NOTIFICATION_NO_DATA;
100 /* Pop outbox1 ringbuffer and update read pointer */
101 dmub_rb_pop_front(&dmub->outbox1_rb);
102 dmub->hw_funcs.set_outbox1_rptr(dmub, dmub->outbox1_rb.rptr);
105 * Notify dc whether dmub has a pending outbox message,
106 * this is to avoid one more call to dmub_srv_stat_get_notification
108 if (dmub_rb_empty(&dmub->outbox1_rb))
109 notify->pending_notification = false;
111 notify->pending_notification = true;
113 return DMUB_STATUS_OK;