Modify driver to support drm_bridge.
Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- .../devicetree/bindings/video/exynos_dp.txt | 12 +++++++ drivers/gpu/drm/exynos/exynos_dp_core.c | 37 ++++++++++++++++---- drivers/gpu/drm/exynos/exynos_dp_core.h | 1 + 3 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt index 53dbccf..7a3a9cd 100644 --- a/Documentation/devicetree/bindings/video/exynos_dp.txt +++ b/Documentation/devicetree/bindings/video/exynos_dp.txt @@ -66,6 +66,10 @@ Optional properties for dp-controller: Hotplug detect GPIO. Indicates which GPIO should be used for hotplug detection + -video interfaces: Device node can contain video interface port + nodes according to [1]. + +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
Example:
@@ -105,4 +109,12 @@ Board Specific portion: vsync-len = <6>; }; }; + + ports { + port@0 { + dp_out: endpoint { + remote-endpoint = <&bridge_in>; + }; + }; + }; }; diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c index 5025b70..d30c748 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> @@ -989,9 +990,19 @@ static struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = { };
/* 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; }
@@ -1005,9 +1016,11 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display, 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;
@@ -1259,7 +1272,7 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data) if (ret) return ret;
- if (!dp->panel) { + if (!dp->panel && !dp->bridge) { ret = exynos_dp_dt_parse_panel(dp); if (ret) return ret; @@ -1345,7 +1358,7 @@ static const struct component_ops exynos_dp_ops = { 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;
@@ -1367,6 +1380,18 @@ static int exynos_dp_probe(struct platform_device *pdev) 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; + } + exynos_dp_display.ctx = dp;
ret = component_add(&pdev->dev, &exynos_dp_ops); diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.h b/drivers/gpu/drm/exynos/exynos_dp_core.h index a1aee69..3b0ba93 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_core.h +++ b/drivers/gpu/drm/exynos/exynos_dp_core.h @@ -150,6 +150,7 @@ struct exynos_dp_device { struct drm_connector connector; struct drm_encoder *encoder; struct drm_panel *panel; + struct drm_bridge *bridge; struct clk *clock; unsigned int irq; void __iomem *reg_base;