Re: [PATCH v5 19/21] drm/tegra: Implement new UAPI

11.01.2021 16:00, Mikko Perttunen пишет:

+int tegra_drm_ioctl_channel_open(struct drm_device *drm, void *data,

• 		 struct drm_file *file)
  

+{

• struct tegra_drm_file *fpriv = file->driver_priv;
• struct tegra_drm *tegra = drm->dev_private;
• struct drm_tegra_channel_open *args = data;
• struct tegra_drm_client *client = NULL;
• struct tegra_drm_channel_ctx *ctx;
• int err;
• if (args->flags)

• return -EINVAL;
  

• ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
• if (!ctx)

• return -ENOMEM;
  

• err = -ENODEV;
• list_for_each_entry(client, &tegra->clients, list) {

• if (client->base.class == args->host1x_class) {
  

• 	err = 0;
  

• 	break;
  

• }
  

• }
• if (err)

• goto free_ctx;
  

• if (client->shared_channel) {

• ctx->channel = host1x_channel_get(client->shared_channel);
  

Let's omit the shared_channel until it will be really needed and used.