drm/exynos: dp: support drm_bridge
Modify driver to support drm_bridge.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
index 27e3d27..46f1497 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -18,6 +18,7 @@
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
#include <linux/gpio.h>
#include <linux/component.h>
#include <linux/phy/phy.h>
@@ -994,9 +995,19 @@
};
/* returns the number of bridges attached */
-static int exynos_drm_attach_lcd_bridge(struct drm_device *dev,
+static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp,
struct drm_encoder *encoder)
{
+ int ret;
+
+ encoder->bridge = dp->bridge;
+ dp->bridge->encoder = encoder;
+ ret = drm_bridge_attach(encoder->dev, dp->bridge);
+ if (ret) {
+ DRM_ERROR("Failed to attach bridge to drm\n");
+ return ret;
+ }
+
return 0;
}
@@ -1010,9 +1021,11 @@
dp->encoder = encoder;
/* Pre-empt DP connector creation if there's a bridge */
- ret = exynos_drm_attach_lcd_bridge(dp->drm_dev, encoder);
- if (ret)
- return 0;
+ if (dp->bridge) {
+ ret = exynos_drm_attach_lcd_bridge(dp, encoder);
+ if (!ret)
+ return 0;
+ }
connector->polled = DRM_CONNECTOR_POLL_HPD;
@@ -1219,7 +1232,7 @@
}
}
- if (!dp->panel) {
+ if (!dp->panel && !dp->bridge) {
ret = exynos_dp_dt_parse_panel(dp);
if (ret)
return ret;
@@ -1303,7 +1316,7 @@
static int exynos_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct device_node *panel_node;
+ struct device_node *panel_node, *bridge_node, *endpoint;
struct exynos_dp_device *dp;
int ret;
@@ -1329,6 +1342,18 @@
return -EPROBE_DEFER;
}
+ endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+ if (endpoint) {
+ bridge_node = of_graph_get_remote_port_parent(endpoint);
+ if (bridge_node) {
+ dp->bridge = of_drm_find_bridge(bridge_node);
+ of_node_put(bridge_node);
+ if (!dp->bridge)
+ return -EPROBE_DEFER;
+ } else
+ return -EPROBE_DEFER;
+ }
+
ret = component_add(&pdev->dev, &exynos_dp_ops);
if (ret)
exynos_drm_component_del(&pdev->dev,