/* SPDX-License-Identifier: MIT */ /* * Copyright (C) 2020 Google, Inc. * * Authors: * Sean Paul */ #include #include #include #include #include "i915_reg.h" #include "intel_ddi.h" #include "intel_de.h" #include "intel_display_types.h" #include "intel_dp.h" #include "intel_dp_hdcp.h" #include "intel_hdcp.h" #include "intel_hdcp_regs.h" static u32 transcoder_to_stream_enc_status(enum transcoder cpu_transcoder) { switch (cpu_transcoder) { case TRANSCODER_A: return HDCP_STATUS_STREAM_A_ENC; case TRANSCODER_B: return HDCP_STATUS_STREAM_B_ENC; case TRANSCODER_C: return HDCP_STATUS_STREAM_C_ENC; case TRANSCODER_D: return HDCP_STATUS_STREAM_D_ENC; default: return 0; } } static void intel_dp_hdcp_wait_for_cp_irq(struct intel_connector *connector, int timeout) { struct intel_hdcp *hdcp = &connector->hdcp; long ret; #define C (hdcp->cp_irq_count_cached != atomic_read(&hdcp->cp_irq_count)) ret = wait_event_interruptible_timeout(hdcp->cp_irq_queue, C, msecs_to_jiffies(timeout)); if (!ret) drm_dbg_kms(connector->base.dev, "Timedout at waiting for CP_IRQ\n"); } static int intel_dp_hdcp_write_an_aksv(struct intel_digital_port *dig_port, u8 *an) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); u8 aksv[DRM_HDCP_KSV_LEN] = {}; ssize_t dpcd_ret; /* Output An first, that's easy */ dpcd_ret = drm_dp_dpcd_write(&dig_port->dp.aux, DP_AUX_HDCP_AN, an, DRM_HDCP_AN_LEN); if (dpcd_ret != DRM_HDCP_AN_LEN) { drm_dbg_kms(&i915->drm, "Failed to write An over DP/AUX (%zd)\n", dpcd_ret); return dpcd_ret >= 0 ? -EIO : dpcd_ret; } /* * Since Aksv is Oh-So-Secret, we can't access it in software. So we * send an empty buffer of the correct length through the DP helpers. On * the other side, in the transfer hook, we'll generate a flag based on * the destination address which will tickle the hardware to output the * Aksv on our behalf after the header is sent. */ dpcd_ret = drm_dp_dpcd_write(&dig_port->dp.aux, DP_AUX_HDCP_AKSV, aksv, DRM_HDCP_KSV_LEN); if (dpcd_ret != DRM_HDCP_KSV_LEN) { drm_dbg_kms(&i915->drm, "Failed to write Aksv over DP/AUX (%zd)\n", dpcd_ret); return dpcd_ret >= 0 ? -EIO : dpcd_ret; } return 0; } static int intel_dp_hdcp_read_bksv(struct intel_digital_port *dig_port, u8 *bksv) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_BKSV, bksv, DRM_HDCP_KSV_LEN); if (ret != DRM_HDCP_KSV_LEN) { drm_dbg_kms(&i915->drm, "Read Bksv from DP/AUX failed (%zd)\n", ret); return ret >= 0 ? -EIO : ret; } return 0; } static int intel_dp_hdcp_read_bstatus(struct intel_digital_port *dig_port, u8 *bstatus) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; /* * For some reason the HDMI and DP HDCP specs call this register * definition by different names. In the HDMI spec, it's called BSTATUS, * but in DP it's called BINFO. */ ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_BINFO, bstatus, DRM_HDCP_BSTATUS_LEN); if (ret != DRM_HDCP_BSTATUS_LEN) { drm_dbg_kms(&i915->drm, "Read bstatus from DP/AUX failed (%zd)\n", ret); return ret >= 0 ? -EIO : ret; } return 0; } static int intel_dp_hdcp_read_bcaps(struct drm_dp_aux *aux, struct drm_i915_private *i915, u8 *bcaps) { ssize_t ret; ret = drm_dp_dpcd_read(aux, DP_AUX_HDCP_BCAPS, bcaps, 1); if (ret != 1) { drm_dbg_kms(&i915->drm, "Read bcaps from DP/AUX failed (%zd)\n", ret); return ret >= 0 ? -EIO : ret; } return 0; } static int intel_dp_hdcp_repeater_present(struct intel_digital_port *dig_port, bool *repeater_present) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; u8 bcaps; ret = intel_dp_hdcp_read_bcaps(&dig_port->dp.aux, i915, &bcaps); if (ret) return ret; *repeater_present = bcaps & DP_BCAPS_REPEATER_PRESENT; return 0; } static int intel_dp_hdcp_read_ri_prime(struct intel_digital_port *dig_port, u8 *ri_prime) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_RI_PRIME, ri_prime, DRM_HDCP_RI_LEN); if (ret != DRM_HDCP_RI_LEN) { drm_dbg_kms(&i915->drm, "Read Ri' from DP/AUX failed (%zd)\n", ret); return ret >= 0 ? -EIO : ret; } return 0; } static int intel_dp_hdcp_read_ksv_ready(struct intel_digital_port *dig_port, bool *ksv_ready) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; u8 bstatus; ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_BSTATUS, &bstatus, 1); if (ret != 1) { drm_dbg_kms(&i915->drm, "Read bstatus from DP/AUX failed (%zd)\n", ret); return ret >= 0 ? -EIO : ret; } *ksv_ready = bstatus & DP_BSTATUS_READY; return 0; } static int intel_dp_hdcp_read_ksv_fifo(struct intel_digital_port *dig_port, int num_downstream, u8 *ksv_fifo) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; int i; /* KSV list is read via 15 byte window (3 entries @ 5 bytes each) */ for (i = 0; i < num_downstream; i += 3) { size_t len = min(num_downstream - i, 3) * DRM_HDCP_KSV_LEN; ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_KSV_FIFO, ksv_fifo + i * DRM_HDCP_KSV_LEN, len); if (ret != len) { drm_dbg_kms(&i915->drm, "Read ksv[%d] from DP/AUX failed (%zd)\n", i, ret); return ret >= 0 ? -EIO : ret; } } return 0; } static int intel_dp_hdcp_read_v_prime_part(struct intel_digital_port *dig_port, int i, u32 *part) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; if (i >= DRM_HDCP_V_PRIME_NUM_PARTS) return -EINVAL; ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_V_PRIME(i), part, DRM_HDCP_V_PRIME_PART_LEN); if (ret != DRM_HDCP_V_PRIME_PART_LEN) { drm_dbg_kms(&i915->drm, "Read v'[%d] from DP/AUX failed (%zd)\n", i, ret); return ret >= 0 ? -EIO : ret; } return 0; } static int intel_dp_hdcp_toggle_signalling(struct intel_digital_port *dig_port, enum transcoder cpu_transcoder, bool enable) { /* Not used for single stream DisplayPort setups */ return 0; } static bool intel_dp_hdcp_check_link(struct intel_digital_port *dig_port, struct intel_connector *connector) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; u8 bstatus; ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_BSTATUS, &bstatus, 1); if (ret != 1) { drm_dbg_kms(&i915->drm, "Read bstatus from DP/AUX failed (%zd)\n", ret); return false; } return !(bstatus & (DP_BSTATUS_LINK_FAILURE | DP_BSTATUS_REAUTH_REQ)); } static int intel_dp_hdcp_get_capability(struct intel_digital_port *dig_port, bool *hdcp_capable) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); ssize_t ret; u8 bcaps; ret = intel_dp_hdcp_read_bcaps(&dig_port->dp.aux, i915, &bcaps); if (ret) return ret; *hdcp_capable = bcaps & DP_BCAPS_HDCP_CAPABLE; return 0; } struct hdcp2_dp_errata_stream_type { u8 msg_id; u8 stream_type; } __packed; struct hdcp2_dp_msg_data { u8 msg_id; u32 offset; bool msg_detectable; u32 timeout; u32 timeout2; /* Added for non_paired situation */ /* Timeout to read entire msg */ u32 msg_read_timeout; }; static const struct hdcp2_dp_msg_data hdcp2_dp_msg_data[] = { { HDCP_2_2_AKE_INIT, DP_HDCP_2_2_AKE_INIT_OFFSET, false, 0, 0, 0}, { HDCP_2_2_AKE_SEND_CERT, DP_HDCP_2_2_AKE_SEND_CERT_OFFSET, false, HDCP_2_2_CERT_TIMEOUT_MS, 0, HDCP_2_2_DP_CERT_READ_TIMEOUT_MS}, { HDCP_2_2_AKE_NO_STORED_KM, DP_HDCP_2_2_AKE_NO_STORED_KM_OFFSET, false, 0, 0, 0 }, { HDCP_2_2_AKE_STORED_KM, DP_HDCP_2_2_AKE_STORED_KM_OFFSET, false, 0, 0, 0 }, { HDCP_2_2_AKE_SEND_HPRIME, DP_HDCP_2_2_AKE_SEND_HPRIME_OFFSET, true, HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS, HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS, HDCP_2_2_DP_HPRIME_READ_TIMEOUT_MS}, { HDCP_2_2_AKE_SEND_PAIRING_INFO, DP_HDCP_2_2_AKE_SEND_PAIRING_INFO_OFFSET, true, HDCP_2_2_PAIRING_TIMEOUT_MS, 0, HDCP_2_2_DP_PAIRING_READ_TIMEOUT_MS }, { HDCP_2_2_LC_INIT, DP_HDCP_2_2_LC_INIT_OFFSET, false, 0, 0, 0 }, { HDCP_2_2_LC_SEND_LPRIME, DP_HDCP_2_2_LC_SEND_LPRIME_OFFSET, false, HDCP_2_2_DP_LPRIME_TIMEOUT_MS, 0, 0 }, { HDCP_2_2_SKE_SEND_EKS, DP_HDCP_2_2_SKE_SEND_EKS_OFFSET, false, 0, 0, 0 }, { HDCP_2_2_REP_SEND_RECVID_LIST, DP_HDCP_2_2_REP_SEND_RECVID_LIST_OFFSET, true, HDCP_2_2_RECVID_LIST_TIMEOUT_MS, 0, 0 }, { HDCP_2_2_REP_SEND_ACK, DP_HDCP_2_2_REP_SEND_ACK_OFFSET, false, 0, 0, 0 }, { HDCP_2_2_REP_STREAM_MANAGE, DP_HDCP_2_2_REP_STREAM_MANAGE_OFFSET, false, 0, 0, 0}, { HDCP_2_2_REP_STREAM_READY, DP_HDCP_2_2_REP_STREAM_READY_OFFSET, false, HDCP_2_2_STREAM_READY_TIMEOUT_MS, 0, 0 }, /* local define to shovel this through the write_2_2 interface */ #define HDCP_2_2_ERRATA_DP_STREAM_TYPE 50 { HDCP_2_2_ERRATA_DP_STREAM_TYPE, DP_HDCP_2_2_REG_STREAM_TYPE_OFFSET, false, 0, 0 }, }; static int intel_dp_hdcp2_read_rx_status(struct intel_connector *connector, u8 *rx_status) { struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_dp_aux *aux = &dig_port->dp.aux; ssize_t ret; ret = drm_dp_dpcd_read(aux, DP_HDCP_2_2_REG_RXSTATUS_OFFSET, rx_status, HDCP_2_2_DP_RXSTATUS_LEN); if (ret != HDCP_2_2_DP_RXSTATUS_LEN) { drm_dbg_kms(&i915->drm, "Read bstatus from DP/AUX failed (%zd)\n", ret); return ret >= 0 ? -EIO : ret; } return 0; } static int hdcp2_detect_msg_availability(struct intel_connector *connector, u8 msg_id, bool *msg_ready) { u8 rx_status; int ret; *msg_ready = false; ret = intel_dp_hdcp2_read_rx_status(connector, &rx_status); if (ret < 0) return ret; switch (msg_id) { case HDCP_2_2_AKE_SEND_HPRIME: if (HDCP_2_2_DP_RXSTATUS_H_PRIME(rx_status)) *msg_ready = true; break; case HDCP_2_2_AKE_SEND_PAIRING_INFO: if (HDCP_2_2_DP_RXSTATUS_PAIRING(rx_status)) *msg_ready = true; break; case HDCP_2_2_REP_SEND_RECVID_LIST: if (HDCP_2_2_DP_RXSTATUS_READY(rx_status)) *msg_ready = true; break; default: drm_err(connector->base.dev, "Unidentified msg_id: %d\n", msg_id); return -EINVAL; } return 0; } static ssize_t intel_dp_hdcp2_wait_for_msg(struct intel_connector *connector, const struct hdcp2_dp_msg_data *hdcp2_msg_data) { struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct intel_dp *dp = &dig_port->dp; struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; u8 msg_id = hdcp2_msg_data->msg_id; int ret, timeout; bool msg_ready = false; if (msg_id == HDCP_2_2_AKE_SEND_HPRIME && !hdcp->is_paired) timeout = hdcp2_msg_data->timeout2; else timeout = hdcp2_msg_data->timeout; /* * There is no way to detect the CERT, LPRIME and STREAM_READY * availability. So Wait for timeout and read the msg. */ if (!hdcp2_msg_data->msg_detectable) { mdelay(timeout); ret = 0; } else { /* * As we want to check the msg availability at timeout, Ignoring * the timeout at wait for CP_IRQ. */ intel_dp_hdcp_wait_for_cp_irq(connector, timeout); ret = hdcp2_detect_msg_availability(connector, msg_id, &msg_ready); if (!msg_ready) ret = -ETIMEDOUT; } if (ret) drm_dbg_kms(&i915->drm, "msg_id %d, ret %d, timeout(mSec): %d\n", hdcp2_msg_data->msg_id, ret, timeout); return ret; } static const struct hdcp2_dp_msg_data *get_hdcp2_dp_msg_data(u8 msg_id) { int i; for (i = 0; i < ARRAY_SIZE(hdcp2_dp_msg_data); i++) if (hdcp2_dp_msg_data[i].msg_id == msg_id) return &hdcp2_dp_msg_data[i]; return NULL; } static int intel_dp_hdcp2_write_msg(struct intel_connector *connector, void *buf, size_t size) { unsigned int offset; u8 *byte = buf; ssize_t ret, bytes_to_write, len; struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_dp_aux *aux = &dig_port->dp.aux; const struct hdcp2_dp_msg_data *hdcp2_msg_data; hdcp2_msg_data = get_hdcp2_dp_msg_data(*byte); if (!hdcp2_msg_data) return -EINVAL; offset = hdcp2_msg_data->offset; /* No msg_id in DP HDCP2.2 msgs */ bytes_to_write = size - 1; byte++; while (bytes_to_write) { len = bytes_to_write > DP_AUX_MAX_PAYLOAD_BYTES ? DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_write; ret = drm_dp_dpcd_write(aux, offset, (void *)byte, len); if (ret < 0) return ret; bytes_to_write -= ret; byte += ret; offset += ret; } return size; } static ssize_t get_receiver_id_list_rx_info(struct intel_connector *connector, u32 *dev_cnt, u8 *byte) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_dp_aux *aux = &dig_port->dp.aux; ssize_t ret; u8 *rx_info = byte; ret = drm_dp_dpcd_read(aux, DP_HDCP_2_2_REG_RXINFO_OFFSET, (void *)rx_info, HDCP_2_2_RXINFO_LEN); if (ret != HDCP_2_2_RXINFO_LEN) return ret >= 0 ? -EIO : ret; *dev_cnt = (HDCP_2_2_DEV_COUNT_HI(rx_info[0]) << 4 | HDCP_2_2_DEV_COUNT_LO(rx_info[1])); if (*dev_cnt > HDCP_2_2_MAX_DEVICE_COUNT) *dev_cnt = HDCP_2_2_MAX_DEVICE_COUNT; return ret; } static int intel_dp_hdcp2_read_msg(struct intel_connector *connector, u8 msg_id, void *buf, size_t size) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); struct drm_dp_aux *aux = &dig_port->dp.aux; struct intel_dp *dp = &dig_port->dp; struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; unsigned int offset; u8 *byte = buf; ssize_t ret, bytes_to_recv, len; const struct hdcp2_dp_msg_data *hdcp2_msg_data; ktime_t msg_end = ktime_set(0, 0); bool msg_expired; u32 dev_cnt; hdcp2_msg_data = get_hdcp2_dp_msg_data(msg_id); if (!hdcp2_msg_data) return -EINVAL; offset = hdcp2_msg_data->offset; ret = intel_dp_hdcp2_wait_for_msg(connector, hdcp2_msg_data); if (ret < 0) return ret; hdcp->cp_irq_count_cached = atomic_read(&hdcp->cp_irq_count); /* DP adaptation msgs has no msg_id */ byte++; if (msg_id == HDCP_2_2_REP_SEND_RECVID_LIST) { ret = get_receiver_id_list_rx_info(connector, &dev_cnt, byte); if (ret < 0) return ret; byte += ret; size = sizeof(struct hdcp2_rep_send_receiverid_list) - HDCP_2_2_RXINFO_LEN - HDCP_2_2_RECEIVER_IDS_MAX_LEN + (dev_cnt * HDCP_2_2_RECEIVER_ID_LEN); offset += HDCP_2_2_RXINFO_LEN; } bytes_to_recv = size - 1; while (bytes_to_recv) { len = bytes_to_recv > DP_AUX_MAX_PAYLOAD_BYTES ? DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_recv; /* Entire msg read timeout since initiate of msg read */ if (bytes_to_recv == size - 1 && hdcp2_msg_data->msg_read_timeout > 0) { msg_end = ktime_add_ms(ktime_get_raw(), hdcp2_msg_data->msg_read_timeout); } ret = drm_dp_dpcd_read(aux, offset, (void *)byte, len); if (ret < 0) { drm_dbg_kms(&i915->drm, "msg_id %d, ret %zd\n", msg_id, ret); return ret; } bytes_to_recv -= ret; byte += ret; offset += ret; } if (hdcp2_msg_data->msg_read_timeout > 0) { msg_expired = ktime_after(ktime_get_raw(), msg_end); if (msg_expired) { drm_dbg_kms(&i915->drm, "msg_id %d, entire msg read timeout(mSec): %d\n", msg_id, hdcp2_msg_data->msg_read_timeout); return -ETIMEDOUT; } } byte = buf; *byte = msg_id; return size; } static int intel_dp_hdcp2_config_stream_type(struct intel_connector *connector, bool is_repeater, u8 content_type) { int ret; struct hdcp2_dp_errata_stream_type stream_type_msg; if (is_repeater) return 0; /* * Errata for DP: As Stream type is used for encryption, Receiver * should be communicated with stream type for the decryption of the * content. * Repeater will be communicated with stream type as a part of it's * auth later in time. */ stream_type_msg.msg_id = HDCP_2_2_ERRATA_DP_STREAM_TYPE; stream_type_msg.stream_type = content_type; ret = intel_dp_hdcp2_write_msg(connector, &stream_type_msg, sizeof(stream_type_msg)); return ret < 0 ? ret : 0; } static int intel_dp_hdcp2_check_link(struct intel_digital_port *dig_port, struct intel_connector *connector) { u8 rx_status; int ret; ret = intel_dp_hdcp2_read_rx_status(connector, &rx_status); if (ret) return ret; if (HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(rx_status)) ret = HDCP_REAUTH_REQUEST; else if (HDCP_2_2_DP_RXSTATUS_LINK_FAILED(rx_status)) ret = HDCP_LINK_INTEGRITY_FAILURE; else if (HDCP_2_2_DP_RXSTATUS_READY(rx_status)) ret = HDCP_TOPOLOGY_CHANGE; return ret; } static int _intel_dp_hdcp2_get_capability(struct drm_dp_aux *aux, bool *capable) { u8 rx_caps[3]; int ret, i; *capable = false; /* * Some HDCP monitors act really shady by not giving the correct hdcp * capability on the first rx_caps read and usually take an extra read * to give the capability. We read rx_caps three times before we * declare a monitor not capable of HDCP 2.2. */ for (i = 0; i < 3; i++) { ret = drm_dp_dpcd_read(aux, DP_HDCP_2_2_REG_RX_CAPS_OFFSET, rx_caps, HDCP_2_2_RXCAPS_LEN); if (ret != HDCP_2_2_RXCAPS_LEN) return ret >= 0 ? -EIO : ret; if (rx_caps[0] == HDCP_2_2_RX_CAPS_VERSION_VAL && HDCP_2_2_DP_HDCP_CAPABLE(rx_caps[2])) { *capable = true; break; } } return 0; } static int intel_dp_hdcp2_get_capability(struct intel_connector *connector, bool *capable) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_dp_aux *aux = &dig_port->dp.aux; return _intel_dp_hdcp2_get_capability(aux, capable); } static int intel_dp_hdcp_get_remote_capability(struct intel_connector *connector, bool *hdcp_capable, bool *hdcp2_capable) { struct drm_i915_private *i915 = to_i915(connector->base.dev); struct drm_dp_aux *aux = &connector->port->aux; u8 bcaps; int ret; *hdcp_capable = false; *hdcp2_capable = false; if (!intel_encoder_is_mst(connector->encoder)) return -EINVAL; ret = _intel_dp_hdcp2_get_capability(aux, hdcp2_capable); if (ret) drm_dbg_kms(&i915->drm, "HDCP2 DPCD capability read failed err: %d\n", ret); ret = intel_dp_hdcp_read_bcaps(aux, i915, &bcaps); if (ret) return ret; *hdcp_capable = bcaps & DP_BCAPS_HDCP_CAPABLE; return 0; } static const struct intel_hdcp_shim intel_dp_hdcp_shim = { .write_an_aksv = intel_dp_hdcp_write_an_aksv, .read_bksv = intel_dp_hdcp_read_bksv, .read_bstatus = intel_dp_hdcp_read_bstatus, .repeater_present = intel_dp_hdcp_repeater_present, .read_ri_prime = intel_dp_hdcp_read_ri_prime, .read_ksv_ready = intel_dp_hdcp_read_ksv_ready, .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo, .read_v_prime_part = intel_dp_hdcp_read_v_prime_part, .toggle_signalling = intel_dp_hdcp_toggle_signalling, .check_link = intel_dp_hdcp_check_link, .hdcp_get_capability = intel_dp_hdcp_get_capability, .write_2_2_msg = intel_dp_hdcp2_write_msg, .read_2_2_msg = intel_dp_hdcp2_read_msg, .config_stream_type = intel_dp_hdcp2_config_stream_type, .check_2_2_link = intel_dp_hdcp2_check_link, .hdcp_2_2_get_capability = intel_dp_hdcp2_get_capability, .protocol = HDCP_PROTOCOL_DP, }; static int intel_dp_mst_toggle_hdcp_stream_select(struct intel_connector *connector, bool enable) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_hdcp *hdcp = &connector->hdcp; int ret; ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, hdcp->stream_transcoder, enable, TRANS_DDI_HDCP_SELECT); if (ret) drm_err(&i915->drm, "%s HDCP stream select failed (%d)\n", enable ? "Enable" : "Disable", ret); return ret; } static int intel_dp_mst_hdcp_stream_encryption(struct intel_connector *connector, bool enable) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_hdcp *hdcp = &connector->hdcp; enum port port = dig_port->base.port; enum transcoder cpu_transcoder = hdcp->stream_transcoder; u32 stream_enc_status; int ret; ret = intel_dp_mst_toggle_hdcp_stream_select(connector, enable); if (ret) return ret; stream_enc_status = transcoder_to_stream_enc_status(cpu_transcoder); if (!stream_enc_status) return -EINVAL; /* Wait for encryption confirmation */ if (intel_de_wait(i915, HDCP_STATUS(i915, cpu_transcoder, port), stream_enc_status, enable ? stream_enc_status : 0, HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) { drm_err(&i915->drm, "Timed out waiting for transcoder: %s stream encryption %s\n", transcoder_name(cpu_transcoder), enable ? "enabled" : "disabled"); return -ETIMEDOUT; } return 0; } static int intel_dp_mst_hdcp2_stream_encryption(struct intel_connector *connector, bool enable) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct hdcp_port_data *data = &dig_port->hdcp_port_data; struct intel_hdcp *hdcp = &connector->hdcp; enum transcoder cpu_transcoder = hdcp->stream_transcoder; enum pipe pipe = (enum pipe)cpu_transcoder; enum port port = dig_port->base.port; int ret; drm_WARN_ON(&i915->drm, enable && !!(intel_de_read(i915, HDCP2_AUTH_STREAM(i915, cpu_transcoder, port)) & AUTH_STREAM_TYPE) != data->streams[0].stream_type); ret = intel_dp_mst_toggle_hdcp_stream_select(connector, enable); if (ret) return ret; /* Wait for encryption confirmation */ if (intel_de_wait(i915, HDCP2_STREAM_STATUS(i915, cpu_transcoder, pipe), STREAM_ENCRYPTION_STATUS, enable ? STREAM_ENCRYPTION_STATUS : 0, HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) { drm_err(&i915->drm, "Timed out waiting for transcoder: %s stream encryption %s\n", transcoder_name(cpu_transcoder), enable ? "enabled" : "disabled"); return -ETIMEDOUT; } return 0; } static int intel_dp_mst_hdcp2_check_link(struct intel_digital_port *dig_port, struct intel_connector *connector) { struct intel_hdcp *hdcp = &connector->hdcp; int ret; /* * We do need to do the Link Check only for the connector involved with * HDCP port authentication and encryption. * We can re-use the hdcp->is_repeater flag to know that the connector * involved with HDCP port authentication and encryption. */ if (hdcp->is_repeater) { ret = intel_dp_hdcp2_check_link(dig_port, connector); if (ret) return ret; } return 0; } static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = { .write_an_aksv = intel_dp_hdcp_write_an_aksv, .read_bksv = intel_dp_hdcp_read_bksv, .read_bstatus = intel_dp_hdcp_read_bstatus, .repeater_present = intel_dp_hdcp_repeater_present, .read_ri_prime = intel_dp_hdcp_read_ri_prime, .read_ksv_ready = intel_dp_hdcp_read_ksv_ready, .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo, .read_v_prime_part = intel_dp_hdcp_read_v_prime_part, .toggle_signalling = intel_dp_hdcp_toggle_signalling, .stream_encryption = intel_dp_mst_hdcp_stream_encryption, .check_link = intel_dp_hdcp_check_link, .hdcp_get_capability = intel_dp_hdcp_get_capability, .write_2_2_msg = intel_dp_hdcp2_write_msg, .read_2_2_msg = intel_dp_hdcp2_read_msg, .config_stream_type = intel_dp_hdcp2_config_stream_type, .stream_2_2_encryption = intel_dp_mst_hdcp2_stream_encryption, .check_2_2_link = intel_dp_mst_hdcp2_check_link, .hdcp_2_2_get_capability = intel_dp_hdcp2_get_capability, .get_remote_hdcp_capability = intel_dp_hdcp_get_remote_capability, .protocol = HDCP_PROTOCOL_DP, }; int intel_dp_hdcp_init(struct intel_digital_port *dig_port, struct intel_connector *intel_connector) { struct drm_device *dev = intel_connector->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_encoder *intel_encoder = &dig_port->base; enum port port = intel_encoder->port; struct intel_dp *intel_dp = &dig_port->dp; if (!is_hdcp_supported(dev_priv, port)) return 0; if (intel_connector->mst_port) return intel_hdcp_init(intel_connector, dig_port, &intel_dp_mst_hdcp_shim); else if (!intel_dp_is_edp(intel_dp)) return intel_hdcp_init(intel_connector, dig_port, &intel_dp_hdcp_shim); return 0; }