diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_drv.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_drv.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index bb9ee2c93eca..f2a69cfb6ebf 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -167,6 +167,8 @@ static void omap_disconnect_pipelines(struct drm_device *ddev) pipe->display = NULL; } + memset(&priv->channels, 0, sizeof(priv->channels)); + priv->num_pipes = 0; } @@ -186,6 +188,7 @@ static int omap_connect_pipelines(struct drm_device *ddev) { struct omap_drm_private *priv = ddev->dev_private; struct omap_dss_device *output = NULL; + unsigned int i; int r; if (!omapdss_stack_is_ready()) @@ -218,6 +221,22 @@ static int omap_connect_pipelines(struct drm_device *ddev) sort(priv->pipes, priv->num_pipes, sizeof(priv->pipes[0]), omap_compare_pipes, NULL); + /* + * Populate the pipeline lookup table by DISPC channel. Only one display + * is allowed per channel. + */ + for (i = 0; i < priv->num_pipes; ++i) { + struct omap_drm_pipeline *pipe = &priv->pipes[i]; + enum omap_channel channel = pipe->output->dispc_channel; + + if (WARN_ON(priv->channels[channel] != NULL)) { + r = -EINVAL; + goto cleanup; + } + + priv->channels[channel] = pipe; + } + return 0; cleanup: |