diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_types.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_hdcp.c | 76 |
2 files changed, 77 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index a4e3f33f75eb..4440521e3e9e 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -496,6 +496,8 @@ struct intel_hdcp { enum transcoder cpu_transcoder; /* Only used for DP MST stream encryption */ enum transcoder stream_transcoder; + /* Used to force HDCP 1.4 bypassing HDCP 2.x */ + bool force_hdcp14; }; struct intel_connector { diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index 591851954114..7063e3f5c538 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -2472,13 +2472,16 @@ static int _intel_hdcp_enable(struct intel_atomic_state *state, * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup * is capable of HDCP2.2, it is preferred to use HDCP2.2. */ - if (intel_hdcp2_get_capability(connector)) { + if (!hdcp->force_hdcp14 && intel_hdcp2_get_capability(connector)) { ret = _intel_hdcp2_enable(state, connector); if (!ret) check_link_interval = DRM_HDCP2_CHECK_PERIOD_MS; } + if (hdcp->force_hdcp14) + drm_dbg_kms(display->drm, "Forcing HDCP 1.4\n"); + /* * When HDCP2.2 fails and Content Type is not Type1, HDCP1.4 will * be attempted. @@ -2806,6 +2809,75 @@ out: } DEFINE_SHOW_ATTRIBUTE(intel_hdcp_sink_capability); +static ssize_t intel_hdcp_force_14_write(struct file *file, + const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct seq_file *m = file->private_data; + struct intel_connector *connector = m->private; + struct intel_hdcp *hdcp = &connector->hdcp; + bool force_hdcp14 = false; + int ret; + + if (len == 0) + return 0; + + ret = kstrtobool_from_user(ubuf, len, &force_hdcp14); + if (ret < 0) + return ret; + + hdcp->force_hdcp14 = force_hdcp14; + *offp += len; + + return len; +} + +static int intel_hdcp_force_14_show(struct seq_file *m, void *data) +{ + struct intel_connector *connector = m->private; + struct intel_display *display = to_intel_display(connector); + struct intel_encoder *encoder = intel_attached_encoder(connector); + struct intel_hdcp *hdcp = &connector->hdcp; + struct drm_crtc *crtc; + int ret; + + if (!encoder) + return -ENODEV; + + ret = drm_modeset_lock_single_interruptible(&display->drm->mode_config.connection_mutex); + if (ret) + return ret; + + crtc = connector->base.state->crtc; + if (connector->base.status != connector_status_connected || !crtc) { + ret = -ENODEV; + goto out; + } + + seq_printf(m, "%s\n", + str_yes_no(hdcp->force_hdcp14)); +out: + drm_modeset_unlock(&display->drm->mode_config.connection_mutex); + + return ret; +} + +static int intel_hdcp_force_14_open(struct inode *inode, + struct file *file) +{ + return single_open(file, intel_hdcp_force_14_show, + inode->i_private); +} + +static const struct file_operations intel_hdcp_force_14_fops = { + .owner = THIS_MODULE, + .open = intel_hdcp_force_14_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = intel_hdcp_force_14_write +}; + void intel_hdcp_connector_debugfs_add(struct intel_connector *connector) { struct dentry *root = connector->base.debugfs_entry; @@ -2816,5 +2888,7 @@ void intel_hdcp_connector_debugfs_add(struct intel_connector *connector) connector_type == DRM_MODE_CONNECTOR_HDMIB) { debugfs_create_file("i915_hdcp_sink_capability", 0444, root, connector, &intel_hdcp_sink_capability_fops); + debugfs_create_file("i915_force_hdcp14", 0644, root, + connector, &intel_hdcp_force_14_fops); } } |