In some platforms there is attached another device to the end of HDMI.
The patch adds support for it.
Signed-off-by: Andrzej Hajda <a.ha...@samsung.com>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 56 +++++++++++++++++++++++++++++-------
1 file changed, 46 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c
b/drivers/gpu/drm/exynos/exynos_hdmi.c
index a73b192..41fb894 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -35,6 +35,7 @@
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
+#include <linux/of_graph.h>
#include <linux/hdmi.h>
#include <linux/component.h>
#include <linux/mfd/syscon.h>
@@ -133,6 +134,7 @@ struct hdmi_context {
struct regulator_bulk_data regul_bulk[ARRAY_SIZE(supply)];
struct regulator *reg_hdmi_en;
struct exynos_drm_clk phy_clk;
+ struct drm_bridge *bridge;
};
static inline struct hdmi_context *encoder_to_hdmi(struct drm_encoder *e)
@@ -922,7 +924,15 @@ static int hdmi_create_connector(struct drm_encoder
*encoder)
drm_connector_register(connector);
drm_mode_connector_attach_encoder(connector, encoder);
- return 0;
+ if (hdata->bridge) {
+ encoder->bridge = hdata->bridge;
+ hdata->bridge->encoder = encoder;
+ ret = drm_bridge_attach(encoder->dev, hdata->bridge);
+ if (ret)
+ DRM_ERROR("Failed to attach bridge\n");
+ }
+
+ return ret;
}
static bool hdmi_mode_fixup(struct drm_encoder *encoder,
@@ -1591,6 +1601,31 @@ static void hdmiphy_clk_enable(struct exynos_drm_clk
*clk, bool enable)
hdmiphy_disable(hdata);
}
+static int hdmi_bridge_init(struct hdmi_context *hdata)
+{
+ struct device *dev = hdata->dev;
+ struct device_node *ep, *np;
+
+ ep = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1);
+ if (!ep)
+ return 0;
+
+ np = of_graph_get_remote_port_parent(ep);
+ of_node_put(ep);
+ if (!np) {
+ DRM_ERROR("failed to get remote port parent");
+ return -EINVAL;
+ }
+
+ hdata->bridge = of_drm_find_bridge(np);
+ of_node_put(np);
+
+ if (!hdata->bridge)
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+
static int hdmi_resources_init(struct hdmi_context *hdata)
{
struct device *dev = hdata->dev;
@@ -1630,17 +1665,18 @@ static int hdmi_resources_init(struct hdmi_context
*hdata)
hdata->reg_hdmi_en = devm_regulator_get_optional(dev, "hdmi-en");
- if (PTR_ERR(hdata->reg_hdmi_en) == -ENODEV)
- return 0;
+ if (PTR_ERR(hdata->reg_hdmi_en) != -ENODEV) {
+ if (IS_ERR(hdata->reg_hdmi_en))
+ return PTR_ERR(hdata->reg_hdmi_en);
- if (IS_ERR(hdata->reg_hdmi_en))
- return PTR_ERR(hdata->reg_hdmi_en);
-
- ret = regulator_enable(hdata->reg_hdmi_en);
- if (ret)
- DRM_ERROR("failed to enable hdmi-en regulator\n");
+ ret = regulator_enable(hdata->reg_hdmi_en);
+ if (ret) {
+ DRM_ERROR("failed to enable hdmi-en regulator\n");
+ return ret;
+ }
+ }
- return ret;
+ return hdmi_bridge_init(hdata);
}
static struct of_device_id hdmi_match_types[] = {
--
2.7.4
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