diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c | 590 |
1 files changed, 590 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c b/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c new file mode 100644 index 000000000000..240b00849f3d --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c @@ -0,0 +1,590 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright 2023, Intel Corporation. + */ + +#include <linux/err.h> +#include <drm/i915_hdcp_interface.h> + +#include "i915_drv.h" +#include "intel_hdcp_gsc_message.h" + +int +intel_hdcp_gsc_initiate_session(struct device *dev, struct hdcp_port_data *data, + struct hdcp2_ake_init *ake_data) +{ + struct wired_cmd_initiate_hdcp2_session_in session_init_in = {}; + struct wired_cmd_initiate_hdcp2_session_out session_init_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !ake_data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + session_init_in.header.api_version = HDCP_API_VERSION; + session_init_in.header.command_id = WIRED_INITIATE_HDCP2_SESSION; + session_init_in.header.status = FW_HDCP_STATUS_SUCCESS; + session_init_in.header.buffer_len = + WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN; + + session_init_in.port.integrated_port_type = data->port_type; + session_init_in.port.physical_port = (u8)data->hdcp_ddi; + session_init_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + session_init_in.protocol = data->protocol; + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&session_init_in, + sizeof(session_init_in), + (u8 *)&session_init_out, + sizeof(session_init_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (session_init_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. Status: 0x%X\n", + WIRED_INITIATE_HDCP2_SESSION, + session_init_out.header.status); + return -EIO; + } + + ake_data->msg_id = HDCP_2_2_AKE_INIT; + ake_data->tx_caps = session_init_out.tx_caps; + memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN); + + return 0; +} + +int +intel_hdcp_gsc_verify_receiver_cert_prepare_km(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ake_send_cert *rx_cert, + bool *km_stored, + struct hdcp2_ake_no_stored_km + *ek_pub_km, + size_t *msg_sz) +{ + struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = {}; + struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !rx_cert || !km_stored || !ek_pub_km || !msg_sz) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + verify_rxcert_in.header.api_version = HDCP_API_VERSION; + verify_rxcert_in.header.command_id = WIRED_VERIFY_RECEIVER_CERT; + verify_rxcert_in.header.status = FW_HDCP_STATUS_SUCCESS; + verify_rxcert_in.header.buffer_len = + WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN; + + verify_rxcert_in.port.integrated_port_type = data->port_type; + verify_rxcert_in.port.physical_port = (u8)data->hdcp_ddi; + verify_rxcert_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + verify_rxcert_in.cert_rx = rx_cert->cert_rx; + memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN); + memcpy(verify_rxcert_in.rx_caps, rx_cert->rx_caps, HDCP_2_2_RXCAPS_LEN); + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&verify_rxcert_in, + sizeof(verify_rxcert_in), + (u8 *)&verify_rxcert_out, + sizeof(verify_rxcert_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed: %zd\n", byte); + return byte; + } + + if (verify_rxcert_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. Status: 0x%X\n", + WIRED_VERIFY_RECEIVER_CERT, + verify_rxcert_out.header.status); + return -EIO; + } + + *km_stored = !!verify_rxcert_out.km_stored; + if (verify_rxcert_out.km_stored) { + ek_pub_km->msg_id = HDCP_2_2_AKE_STORED_KM; + *msg_sz = sizeof(struct hdcp2_ake_stored_km); + } else { + ek_pub_km->msg_id = HDCP_2_2_AKE_NO_STORED_KM; + *msg_sz = sizeof(struct hdcp2_ake_no_stored_km); + } + + memcpy(ek_pub_km->e_kpub_km, &verify_rxcert_out.ekm_buff, + sizeof(verify_rxcert_out.ekm_buff)); + + return 0; +} + +int +intel_hdcp_gsc_verify_hprime(struct device *dev, struct hdcp_port_data *data, + struct hdcp2_ake_send_hprime *rx_hprime) +{ + struct wired_cmd_ake_send_hprime_in send_hprime_in = {}; + struct wired_cmd_ake_send_hprime_out send_hprime_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !rx_hprime) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + send_hprime_in.header.api_version = HDCP_API_VERSION; + send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME; + send_hprime_in.header.status = FW_HDCP_STATUS_SUCCESS; + send_hprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN; + + send_hprime_in.port.integrated_port_type = data->port_type; + send_hprime_in.port.physical_port = (u8)data->hdcp_ddi; + send_hprime_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + memcpy(send_hprime_in.h_prime, rx_hprime->h_prime, + HDCP_2_2_H_PRIME_LEN); + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&send_hprime_in, + sizeof(send_hprime_in), + (u8 *)&send_hprime_out, + sizeof(send_hprime_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (send_hprime_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. Status: 0x%X\n", + WIRED_AKE_SEND_HPRIME, send_hprime_out.header.status); + return -EIO; + } + + return 0; +} + +int +intel_hdcp_gsc_store_pairing_info(struct device *dev, struct hdcp_port_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + struct wired_cmd_ake_send_pairing_info_in pairing_info_in = {}; + struct wired_cmd_ake_send_pairing_info_out pairing_info_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !pairing_info) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + pairing_info_in.header.api_version = HDCP_API_VERSION; + pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO; + pairing_info_in.header.status = FW_HDCP_STATUS_SUCCESS; + pairing_info_in.header.buffer_len = + WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN; + + pairing_info_in.port.integrated_port_type = data->port_type; + pairing_info_in.port.physical_port = (u8)data->hdcp_ddi; + pairing_info_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km, + HDCP_2_2_E_KH_KM_LEN); + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&pairing_info_in, + sizeof(pairing_info_in), + (u8 *)&pairing_info_out, + sizeof(pairing_info_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (pairing_info_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. Status: 0x%X\n", + WIRED_AKE_SEND_PAIRING_INFO, + pairing_info_out.header.status); + return -EIO; + } + + return 0; +} + +int +intel_hdcp_gsc_initiate_locality_check(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_lc_init *lc_init_data) +{ + struct wired_cmd_init_locality_check_in lc_init_in = {}; + struct wired_cmd_init_locality_check_out lc_init_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !lc_init_data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + lc_init_in.header.api_version = HDCP_API_VERSION; + lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK; + lc_init_in.header.status = FW_HDCP_STATUS_SUCCESS; + lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN; + + lc_init_in.port.integrated_port_type = data->port_type; + lc_init_in.port.physical_port = (u8)data->hdcp_ddi; + lc_init_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&lc_init_in, sizeof(lc_init_in), + (u8 *)&lc_init_out, sizeof(lc_init_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (lc_init_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. status: 0x%X\n", + WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status); + return -EIO; + } + + lc_init_data->msg_id = HDCP_2_2_LC_INIT; + memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN); + + return 0; +} + +int +intel_hdcp_gsc_verify_lprime(struct device *dev, struct hdcp_port_data *data, + struct hdcp2_lc_send_lprime *rx_lprime) +{ + struct wired_cmd_validate_locality_in verify_lprime_in = {}; + struct wired_cmd_validate_locality_out verify_lprime_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !rx_lprime) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + verify_lprime_in.header.api_version = HDCP_API_VERSION; + verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY; + verify_lprime_in.header.status = FW_HDCP_STATUS_SUCCESS; + verify_lprime_in.header.buffer_len = + WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN; + + verify_lprime_in.port.integrated_port_type = data->port_type; + verify_lprime_in.port.physical_port = (u8)data->hdcp_ddi; + verify_lprime_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime, + HDCP_2_2_L_PRIME_LEN); + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&verify_lprime_in, + sizeof(verify_lprime_in), + (u8 *)&verify_lprime_out, + sizeof(verify_lprime_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (verify_lprime_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", + WIRED_VALIDATE_LOCALITY, + verify_lprime_out.header.status); + return -EIO; + } + + return 0; +} + +int intel_hdcp_gsc_get_session_key(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ske_send_eks *ske_data) +{ + struct wired_cmd_get_session_key_in get_skey_in = {}; + struct wired_cmd_get_session_key_out get_skey_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data || !ske_data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + get_skey_in.header.api_version = HDCP_API_VERSION; + get_skey_in.header.command_id = WIRED_GET_SESSION_KEY; + get_skey_in.header.status = FW_HDCP_STATUS_SUCCESS; + get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN; + + get_skey_in.port.integrated_port_type = data->port_type; + get_skey_in.port.physical_port = (u8)data->hdcp_ddi; + get_skey_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&get_skey_in, sizeof(get_skey_in), + (u8 *)&get_skey_out, sizeof(get_skey_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (get_skey_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", + WIRED_GET_SESSION_KEY, get_skey_out.header.status); + return -EIO; + } + + ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS; + memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks, + HDCP_2_2_E_DKEY_KS_LEN); + memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN); + + return 0; +} + +int +intel_hdcp_gsc_repeater_check_flow_prepare_ack(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_rep_send_receiverid_list + *rep_topology, + struct hdcp2_rep_send_ack + *rep_send_ack) +{ + struct wired_cmd_verify_repeater_in verify_repeater_in = {}; + struct wired_cmd_verify_repeater_out verify_repeater_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !rep_topology || !rep_send_ack || !data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + verify_repeater_in.header.api_version = HDCP_API_VERSION; + verify_repeater_in.header.command_id = WIRED_VERIFY_REPEATER; + verify_repeater_in.header.status = FW_HDCP_STATUS_SUCCESS; + verify_repeater_in.header.buffer_len = + WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN; + + verify_repeater_in.port.integrated_port_type = data->port_type; + verify_repeater_in.port.physical_port = (u8)data->hdcp_ddi; + verify_repeater_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + memcpy(verify_repeater_in.rx_info, rep_topology->rx_info, + HDCP_2_2_RXINFO_LEN); + memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v, + HDCP_2_2_SEQ_NUM_LEN); + memcpy(verify_repeater_in.v_prime, rep_topology->v_prime, + HDCP_2_2_V_PRIME_HALF_LEN); + memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids, + HDCP_2_2_RECEIVER_IDS_MAX_LEN); + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&verify_repeater_in, + sizeof(verify_repeater_in), + (u8 *)&verify_repeater_out, + sizeof(verify_repeater_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (verify_repeater_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", + WIRED_VERIFY_REPEATER, + verify_repeater_out.header.status); + return -EIO; + } + + memcpy(rep_send_ack->v, verify_repeater_out.v, + HDCP_2_2_V_PRIME_HALF_LEN); + rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK; + + return 0; +} + +int intel_hdcp_gsc_verify_mprime(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_rep_stream_ready *stream_ready) +{ + struct wired_cmd_repeater_auth_stream_req_in *verify_mprime_in; + struct wired_cmd_repeater_auth_stream_req_out verify_mprime_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + size_t cmd_size; + + if (!dev || !stream_ready || !data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + cmd_size = struct_size(verify_mprime_in, streams, data->k); + if (cmd_size == SIZE_MAX) + return -EINVAL; + + verify_mprime_in = kzalloc(cmd_size, GFP_KERNEL); + if (!verify_mprime_in) + return -ENOMEM; + + verify_mprime_in->header.api_version = HDCP_API_VERSION; + verify_mprime_in->header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ; + verify_mprime_in->header.status = FW_HDCP_STATUS_SUCCESS; + verify_mprime_in->header.buffer_len = cmd_size - sizeof(verify_mprime_in->header); + + verify_mprime_in->port.integrated_port_type = data->port_type; + verify_mprime_in->port.physical_port = (u8)data->hdcp_ddi; + verify_mprime_in->port.attached_transcoder = (u8)data->hdcp_transcoder; + + memcpy(verify_mprime_in->m_prime, stream_ready->m_prime, HDCP_2_2_MPRIME_LEN); + drm_hdcp_cpu_to_be24(verify_mprime_in->seq_num_m, data->seq_num_m); + + memcpy(verify_mprime_in->streams, data->streams, + array_size(data->k, sizeof(*data->streams))); + + verify_mprime_in->k = cpu_to_be16(data->k); + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)verify_mprime_in, cmd_size, + (u8 *)&verify_mprime_out, + sizeof(verify_mprime_out)); + kfree(verify_mprime_in); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (verify_mprime_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", + WIRED_REPEATER_AUTH_STREAM_REQ, + verify_mprime_out.header.status); + return -EIO; + } + + return 0; +} + +int intel_hdcp_gsc_enable_authentication(struct device *dev, + struct hdcp_port_data *data) +{ + struct wired_cmd_enable_auth_in enable_auth_in = {}; + struct wired_cmd_enable_auth_out enable_auth_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + enable_auth_in.header.api_version = HDCP_API_VERSION; + enable_auth_in.header.command_id = WIRED_ENABLE_AUTH; + enable_auth_in.header.status = FW_HDCP_STATUS_SUCCESS; + enable_auth_in.header.buffer_len = WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN; + + enable_auth_in.port.integrated_port_type = data->port_type; + enable_auth_in.port.physical_port = (u8)data->hdcp_ddi; + enable_auth_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + enable_auth_in.stream_type = data->streams[0].stream_type; + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&enable_auth_in, + sizeof(enable_auth_in), + (u8 *)&enable_auth_out, + sizeof(enable_auth_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (enable_auth_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", + WIRED_ENABLE_AUTH, enable_auth_out.header.status); + return -EIO; + } + + return 0; +} + +int +intel_hdcp_gsc_close_session(struct device *dev, struct hdcp_port_data *data) +{ + struct wired_cmd_close_session_in session_close_in = {}; + struct wired_cmd_close_session_out session_close_out = {}; + struct drm_i915_private *i915; + ssize_t byte; + + if (!dev || !data) + return -EINVAL; + + i915 = kdev_to_i915(dev); + if (!i915) { + dev_err(dev, "DRM not initialized, aborting HDCP.\n"); + return -ENODEV; + } + + session_close_in.header.api_version = HDCP_API_VERSION; + session_close_in.header.command_id = WIRED_CLOSE_SESSION; + session_close_in.header.status = FW_HDCP_STATUS_SUCCESS; + session_close_in.header.buffer_len = + WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN; + + session_close_in.port.integrated_port_type = data->port_type; + session_close_in.port.physical_port = (u8)data->hdcp_ddi; + session_close_in.port.attached_transcoder = (u8)data->hdcp_transcoder; + + byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&session_close_in, + sizeof(session_close_in), + (u8 *)&session_close_out, + sizeof(session_close_out)); + if (byte < 0) { + drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); + return byte; + } + + if (session_close_out.header.status != FW_HDCP_STATUS_SUCCESS) { + drm_dbg_kms(&i915->drm, "Session Close Failed. status: 0x%X\n", + session_close_out.header.status); + return -EIO; + } + + return 0; +} |