drm/exynos: Implement lvds bridge discovery to DP driver
This patch implements the lvds bridge discovery and connector pre-emption
code to the dp driver.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
index af2c9d2..a59bca9 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -25,6 +25,7 @@
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/bridge/ptn3460.h>
#include "exynos_drm_drv.h"
#include "exynos_dp_core.h"
@@ -32,6 +33,11 @@
#define ctx_from_connector(c) container_of(c, struct exynos_dp_device, \
connector)
+struct bridge_init {
+ struct i2c_client *client;
+ struct device_node *node;
+};
+
static int exynos_dp_init_dp(struct exynos_dp_device *dp)
{
exynos_dp_reset(dp);
@@ -973,6 +979,35 @@
return 0;
}
+static bool find_bridge(const char *compat, struct bridge_init *bridge)
+{
+ bridge->client = NULL;
+ bridge->node = of_find_compatible_node(NULL, NULL, compat);
+ if (!bridge->node)
+ return false;
+
+ bridge->client = of_find_i2c_device_by_node(bridge->node);
+ if (!bridge->client)
+ return false;
+
+ return true;
+}
+
+/* returns the number of bridges attached */
+static int exynos_drm_attach_lcd_bridge(struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ struct bridge_init bridge;
+ int ret;
+
+ if (find_bridge("nxp,ptn3460", &bridge)) {
+ ret = ptn3460_init(dev, encoder, bridge.client, bridge.node);
+ if (!ret)
+ return 1;
+ }
+ return 0;
+}
+
static int exynos_dp_create_connector(struct exynos_drm_display *display,
struct drm_encoder *encoder)
{
@@ -981,6 +1016,12 @@
int ret;
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;
+
connector->polled = DRM_CONNECTOR_POLL_HPD;
ret = drm_connector_init(dp->drm_dev, connector,