diff options
Diffstat (limited to 'drivers/gpu/drm/drm_dp_mst_topology.c')
-rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 99 |
1 files changed, 82 insertions, 17 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 196ebba8af5f..b1c63e9cdf8a 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -33,7 +33,7 @@ #include <drm/drm_fixed.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> -#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h> /** * DOC: dp mst helper @@ -67,6 +67,64 @@ static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, static int drm_dp_mst_register_i2c_bus(struct drm_dp_aux *aux); static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux); static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr); + +#define DP_STR(x) [DP_ ## x] = #x + +static const char *drm_dp_mst_req_type_str(u8 req_type) +{ + static const char * const req_type_str[] = { + DP_STR(GET_MSG_TRANSACTION_VERSION), + DP_STR(LINK_ADDRESS), + DP_STR(CONNECTION_STATUS_NOTIFY), + DP_STR(ENUM_PATH_RESOURCES), + DP_STR(ALLOCATE_PAYLOAD), + DP_STR(QUERY_PAYLOAD), + DP_STR(RESOURCE_STATUS_NOTIFY), + DP_STR(CLEAR_PAYLOAD_ID_TABLE), + DP_STR(REMOTE_DPCD_READ), + DP_STR(REMOTE_DPCD_WRITE), + DP_STR(REMOTE_I2C_READ), + DP_STR(REMOTE_I2C_WRITE), + DP_STR(POWER_UP_PHY), + DP_STR(POWER_DOWN_PHY), + DP_STR(SINK_EVENT_NOTIFY), + DP_STR(QUERY_STREAM_ENC_STATUS), + }; + + if (req_type >= ARRAY_SIZE(req_type_str) || + !req_type_str[req_type]) + return "unknown"; + + return req_type_str[req_type]; +} + +#undef DP_STR +#define DP_STR(x) [DP_NAK_ ## x] = #x + +static const char *drm_dp_mst_nak_reason_str(u8 nak_reason) +{ + static const char * const nak_reason_str[] = { + DP_STR(WRITE_FAILURE), + DP_STR(INVALID_READ), + DP_STR(CRC_FAILURE), + DP_STR(BAD_PARAM), + DP_STR(DEFER), + DP_STR(LINK_FAILURE), + DP_STR(NO_RESOURCES), + DP_STR(DPCD_FAIL), + DP_STR(I2C_NAK), + DP_STR(ALLOCATE_FAIL), + }; + + if (nak_reason >= ARRAY_SIZE(nak_reason_str) || + !nak_reason_str[nak_reason]) + return "unknown"; + + return nak_reason_str[nak_reason]; +} + +#undef DP_STR + /* sideband msg handling */ static u8 drm_dp_msg_header_crc4(const uint8_t *data, size_t num_nibbles) { @@ -568,7 +626,7 @@ static bool drm_dp_sideband_parse_reply(struct drm_dp_sideband_msg_rx *raw, msg->reply_type = (raw->msg[0] & 0x80) >> 7; msg->req_type = (raw->msg[0] & 0x7f); - if (msg->reply_type) { + if (msg->reply_type == DP_SIDEBAND_REPLY_NAK) { memcpy(msg->u.nak.guid, &raw->msg[1], 16); msg->u.nak.reason = raw->msg[17]; msg->u.nak.nak_data = raw->msg[18]; @@ -594,7 +652,8 @@ static bool drm_dp_sideband_parse_reply(struct drm_dp_sideband_msg_rx *raw, case DP_POWER_UP_PHY: return drm_dp_sideband_parse_power_updown_phy_ack(raw, msg); default: - DRM_ERROR("Got unknown reply 0x%02x\n", msg->req_type); + DRM_ERROR("Got unknown reply 0x%02x (%s)\n", msg->req_type, + drm_dp_mst_req_type_str(msg->req_type)); return false; } } @@ -661,7 +720,8 @@ static bool drm_dp_sideband_parse_req(struct drm_dp_sideband_msg_rx *raw, case DP_RESOURCE_STATUS_NOTIFY: return drm_dp_sideband_parse_resource_status_notify(raw, msg); default: - DRM_ERROR("Got unknown request 0x%02x\n", msg->req_type); + DRM_ERROR("Got unknown request 0x%02x (%s)\n", msg->req_type, + drm_dp_mst_req_type_str(msg->req_type)); return false; } } @@ -1969,9 +2029,9 @@ static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, if (ret > 0) { int i; - if (txmsg->reply.reply_type == 1) + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) { DRM_DEBUG_KMS("link address nak received\n"); - else { + } else { DRM_DEBUG_KMS("link address reply: %d\n", txmsg->reply.u.link_addr.nports); for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) { DRM_DEBUG_KMS("port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n", i, @@ -2020,9 +2080,9 @@ static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); if (ret > 0) { - if (txmsg->reply.reply_type == 1) + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) { DRM_DEBUG_KMS("enum path resources nak received\n"); - else { + } else { if (port->port_num != txmsg->reply.u.path_resources.port_number) DRM_ERROR("got incorrect port in response\n"); DRM_DEBUG_KMS("enum path resources %d: %d %d\n", txmsg->reply.u.path_resources.port_number, txmsg->reply.u.path_resources.full_payload_bw_number, @@ -2132,7 +2192,7 @@ static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr, */ ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); if (ret > 0) { - if (txmsg->reply.reply_type == 1) + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) ret = -EINVAL; else ret = 0; @@ -2165,7 +2225,7 @@ int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, ret = drm_dp_mst_wait_tx_reply(port->parent, txmsg); if (ret > 0) { - if (txmsg->reply.reply_type == 1) + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) ret = -EINVAL; else ret = 0; @@ -2423,9 +2483,9 @@ static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); if (ret > 0) { - if (txmsg->reply.reply_type == 1) { + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) ret = -EINVAL; - } else + else ret = 0; } kfree(txmsg); @@ -2438,7 +2498,7 @@ static int drm_dp_encode_up_ack_reply(struct drm_dp_sideband_msg_tx *msg, u8 req { struct drm_dp_sideband_msg_reply_body reply; - reply.reply_type = 0; + reply.reply_type = DP_SIDEBAND_REPLY_ACK; reply.req_type = req_type; drm_dp_encode_sideband_reply(&reply, msg); return 0; @@ -2745,9 +2805,14 @@ static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr) } drm_dp_sideband_parse_reply(&mgr->down_rep_recv, &txmsg->reply); - if (txmsg->reply.reply_type == 1) { - DRM_DEBUG_KMS("Got NAK reply: req 0x%02x, reason 0x%02x, nak data 0x%02x\n", txmsg->reply.req_type, txmsg->reply.u.nak.reason, txmsg->reply.u.nak.nak_data); - } + + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) + DRM_DEBUG_KMS("Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n", + txmsg->reply.req_type, + drm_dp_mst_req_type_str(txmsg->reply.req_type), + txmsg->reply.u.nak.reason, + drm_dp_mst_nak_reason_str(txmsg->reply.u.nak.reason), + txmsg->reply.u.nak.nak_data); memset(&mgr->down_rep_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); drm_dp_mst_topology_put_mstb(mstb); @@ -3893,7 +3958,7 @@ static int drm_dp_mst_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); if (ret > 0) { - if (txmsg->reply.reply_type == 1) { /* got a NAK back */ + if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) { ret = -EREMOTEIO; goto out; } |