diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 48572b157222ed047d54df44110139e0649d642d..8d432e50a1968174a4676d02fa1331982fbd726e 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -3522,6 +3522,57 @@ static int i915_wa_registers(struct seq_file *m, void *unused) return 0; } +static int i915_ipc_status_show(struct seq_file *m, void *data) +{ + struct drm_i915_private *dev_priv = m->private; + + seq_printf(m, "Isochronous Priority Control: %s\n", + yesno(dev_priv->ipc_enabled)); + return 0; +} + +static int i915_ipc_status_open(struct inode *inode, struct file *file) +{ + struct drm_i915_private *dev_priv = inode->i_private; + + if (!HAS_IPC(dev_priv)) + return -ENODEV; + + return single_open(file, i915_ipc_status_show, dev_priv); +} + +static ssize_t i915_ipc_status_write(struct file *file, const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct seq_file *m = file->private_data; + struct drm_i915_private *dev_priv = m->private; + int ret; + bool enable; + + ret = kstrtobool_from_user(ubuf, len, &enable); + if (ret < 0) + return ret; + + intel_runtime_pm_get(dev_priv); + if (!dev_priv->ipc_enabled && enable) + DRM_INFO("Enabling IPC: WM will be proper only after next commit\n"); + dev_priv->wm.distrust_bios_wm = true; + dev_priv->ipc_enabled = enable; + intel_enable_ipc(dev_priv); + intel_runtime_pm_put(dev_priv); + + return len; +} + +static const struct file_operations i915_ipc_status_fops = { + .owner = THIS_MODULE, + .open = i915_ipc_status_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = i915_ipc_status_write +}; + static int i915_ddb_info(struct seq_file *m, void *unused) { struct drm_i915_private *dev_priv = node_to_i915(m->private); @@ -4858,7 +4909,8 @@ static const struct i915_debugfs_files { {"i915_dp_test_type", &i915_displayport_test_type_fops}, {"i915_dp_test_active", &i915_displayport_test_active_fops}, {"i915_guc_log_control", &i915_guc_log_control_fops}, - {"i915_hpd_storm_ctl", &i915_hpd_storm_ctl_fops} + {"i915_hpd_storm_ctl", &i915_hpd_storm_ctl_fops}, + {"i915_ipc_status", &i915_ipc_status_fops} }; int i915_debugfs_register(struct drm_i915_private *dev_priv)