Initialize port device node pointer in the tilcdc crtc. Fixes "Falling
back to first CRTC" warning from tda998x driver.
The tda998x encoder driver calls drm_of_find_possible_crtcs() to
initialize possible_crtcs of struct drm_encoder. The crtc->port needs
to be initialized for drm_of_find_possible_crtcs() to work.
Signed-off-by: Jyri Sarha <jsarha@xxxxxx>
---
drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 248e3ea..5f4da8c 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -124,6 +124,7 @@ static void tilcdc_crtc_destroy(struct drm_crtc *crtc)
tilcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+ of_node_put(crtc->port);
drm_crtc_cleanup(crtc);
drm_flip_work_cleanup(&tilcdc_crtc->unref_work);
@@ -749,6 +750,7 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc)
struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev)
{
+ struct tilcdc_drm_private *priv = dev->dev_private;
struct tilcdc_crtc *tilcdc_crtc;
struct drm_crtc *crtc;
int ret;
@@ -775,6 +777,24 @@ struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev)
drm_crtc_helper_add(crtc, &tilcdc_crtc_helper_funcs);
+ if (priv->is_componentized) {
+ struct device_node *ports =
+ of_get_child_by_name(dev->dev->of_node, "ports");
+
+ if (ports) {
+ crtc->port = of_get_child_by_name(ports, "port");
+ of_node_put(ports);
+ } else {
+ crtc->port =
+ of_get_child_by_name(dev->dev->of_node, "port");
+ }
+ if (!crtc->port) { /* This should never happen */
+ dev_err(dev->dev, "Port node not found in %s\n",
+ dev->dev->of_node->full_name);
+ goto fail;
+ }
+ }
+
return crtc;
fail:
--
1.9.1
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