The TI TDP158 is an AC-Coupled HDMI signal to TMDS Redriver supporting
DVI 1.0 and HDMI 1.4b and 2.0b output signals.
The default settings work fine for our use-case.
Signed-off-by: Marc Gonzalez <mgonzalez@xxxxxxxxxx>
---
drivers/gpu/drm/bridge/Kconfig | 6 +++
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/ti-tdp158.c | 103 +++++++++++++++++++++++++++++++++++++
3 files changed, 110 insertions(+)
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index c621be1a99a89..0859f85cb4b69 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -368,6 +368,12 @@ config DRM_TI_DLPC3433
It supports up to 720p resolution with 60 and 120 Hz refresh
rates.
+config DRM_TI_TDP158
+ tristate "TI TDP158 HDMI/TMDS bridge"
+ depends on OF
+ help
+ Texas Instruments TDP158 HDMI/TMDS Bridge driver
+
config DRM_TI_TFP410
tristate "TI TFP410 DVI/HDMI bridge"
depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 7df87b582dca3..3daf803ce80b6 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
obj-$(CONFIG_DRM_TI_DLPC3433) += ti-dlpc3433.o
obj-$(CONFIG_DRM_TI_SN65DSI83) += ti-sn65dsi83.o
obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
+obj-$(CONFIG_DRM_TI_TDP158) += ti-tdp158.o
obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
obj-$(CONFIG_DRM_TI_TPD12S015) += ti-tpd12s015.o
obj-$(CONFIG_DRM_NWL_MIPI_DSI) += nwl-dsi.o
diff --git a/drivers/gpu/drm/bridge/ti-tdp158.c b/drivers/gpu/drm/bridge/ti-tdp158.c
new file mode 100644
index 0000000000000..b65132e3598fc
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-tdp158.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2024 Freebox SAS
+ */
+#include <drm/drm_bridge.h>
+#include <drm/drm_atomic_helper.h>
+#include <linux/i2c.h>
+
+struct tdp158 {
+ struct drm_bridge bridge;
+ struct drm_bridge *next;
+ struct gpio_desc *enable; // Operation Enable - pin 36
+ struct regulator *vcc; // 3.3V
+ struct regulator *vdd; // 1.1V
+};
+
+static void tdp158_enable(struct drm_bridge *bridge, struct drm_bridge_state *prev)
+{
+ int err;
+ struct tdp158 *tdp158 = bridge->driver_private;
+
+ if ((err = regulator_enable(tdp158->vcc)))
+ pr_err("%s: vcc: %d", __func__, err);
+
+ if ((err = regulator_enable(tdp158->vdd)))
+ pr_err("%s: vdd: %d", __func__, err);
+
+ gpiod_set_value_cansleep(tdp158->enable, 1);
+}
+
+static void tdp158_disable(struct drm_bridge *bridge, struct drm_bridge_state *prev)
+{
+ struct tdp158 *tdp158 = bridge->driver_private;
+
+ gpiod_set_value_cansleep(tdp158->enable, 0);
+ regulator_disable(tdp158->vdd);
+ regulator_disable(tdp158->vcc);
+}
+
+static int tdp158_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags)
+{
+ struct tdp158 *tdp158 = bridge->driver_private;
+ return drm_bridge_attach(bridge->encoder, tdp158->next, bridge, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+}
+
+static const struct drm_bridge_funcs tdp158_bridge_funcs = {
+ .attach = tdp158_attach,
+ .atomic_enable = tdp158_enable,
+ .atomic_disable = tdp158_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+};
+
+static int tdp158_bridge_probe(struct i2c_client *client)
+{
+ struct tdp158 *tdp158;
+ struct device *dev = &client->dev;
+
+ tdp158 = devm_kzalloc(dev, sizeof(*tdp158), GFP_KERNEL);
+ if (!tdp158)
+ return -ENOMEM;
+
+ tdp158->next = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
+ if (IS_ERR(tdp158->next))
+ return dev_err_probe(dev, PTR_ERR(tdp158->next), "next");
+
+ tdp158->vcc = devm_regulator_get(dev, "vcc");
+ if (IS_ERR(tdp158->vcc))
+ return dev_err_probe(dev, PTR_ERR(tdp158->vcc), "vcc");
+
+ tdp158->vdd = devm_regulator_get(dev, "vdd");
+ if (IS_ERR(tdp158->vdd))
+ return dev_err_probe(dev, PTR_ERR(tdp158->vdd), "vdd");
+
+ tdp158->enable = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(tdp158->enable))
+ return dev_err_probe(dev, PTR_ERR(tdp158->enable), "enable");
+
+ tdp158->bridge.of_node = dev->of_node;
+ tdp158->bridge.funcs = &tdp158_bridge_funcs;
+ tdp158->bridge.driver_private = tdp158;
+
+ return devm_drm_bridge_add(dev, &tdp158->bridge);
+}
+
+static const struct of_device_id tdp158_bridge_match_table[] = {
+ { .compatible = "ti,tdp158" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tdp158_bridge_match_table);
+
+static struct i2c_driver tdp158_bridge_driver = {
+ .probe = tdp158_bridge_probe,
+ .driver = {
+ .name = "tdp158-bridge",
+ .of_match_table = tdp158_bridge_match_table,
+ },
+};
+module_i2c_driver(tdp158_bridge_driver);
+
+MODULE_DESCRIPTION("TI TDP158 driver");
+MODULE_LICENSE("GPL");
--
2.34.1
