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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/bridge/ti-tpd12s015.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/bridge/ti-tpd12s015.c')
-rw-r--r--drivers/gpu/drm/bridge/ti-tpd12s015.c211
1 files changed, 211 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/ti-tpd12s015.c b/drivers/gpu/drm/bridge/ti-tpd12s015.c
new file mode 100644
index 000000000..b588fea12
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-tpd12s015.c
@@ -0,0 +1,211 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TPD12S015 HDMI ESD protection & level shifter chip driver
+ *
+ * Copyright (C) 2019 Texas Instruments Incorporated
+ *
+ * Based on the omapdrm-specific encoder-opa362 driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_bridge.h>
+
+struct tpd12s015_device {
+ struct drm_bridge bridge;
+
+ struct gpio_desc *ct_cp_hpd_gpio;
+ struct gpio_desc *ls_oe_gpio;
+ struct gpio_desc *hpd_gpio;
+ int hpd_irq;
+
+ struct drm_bridge *next_bridge;
+};
+
+static inline struct tpd12s015_device *to_tpd12s015(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct tpd12s015_device, bridge);
+}
+
+static int tpd12s015_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ ret = drm_bridge_attach(bridge->encoder, tpd->next_bridge,
+ bridge, flags);
+ if (ret < 0)
+ return ret;
+
+ gpiod_set_value_cansleep(tpd->ls_oe_gpio, 1);
+
+ /* DC-DC converter needs at max 300us to get to 90% of 5V. */
+ usleep_range(300, 1000);
+
+ return 0;
+}
+
+static void tpd12s015_detach(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ gpiod_set_value_cansleep(tpd->ls_oe_gpio, 0);
+}
+
+static enum drm_connector_status tpd12s015_detect(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ if (gpiod_get_value_cansleep(tpd->hpd_gpio))
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+}
+
+static void tpd12s015_hpd_enable(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ gpiod_set_value_cansleep(tpd->ct_cp_hpd_gpio, 1);
+}
+
+static void tpd12s015_hpd_disable(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ gpiod_set_value_cansleep(tpd->ct_cp_hpd_gpio, 0);
+}
+
+static const struct drm_bridge_funcs tpd12s015_bridge_funcs = {
+ .attach = tpd12s015_attach,
+ .detach = tpd12s015_detach,
+ .detect = tpd12s015_detect,
+ .hpd_enable = tpd12s015_hpd_enable,
+ .hpd_disable = tpd12s015_hpd_disable,
+};
+
+static irqreturn_t tpd12s015_hpd_isr(int irq, void *data)
+{
+ struct tpd12s015_device *tpd = data;
+ struct drm_bridge *bridge = &tpd->bridge;
+
+ drm_bridge_hpd_notify(bridge, tpd12s015_detect(bridge));
+
+ return IRQ_HANDLED;
+}
+
+static int tpd12s015_probe(struct platform_device *pdev)
+{
+ struct tpd12s015_device *tpd;
+ struct device_node *node;
+ struct gpio_desc *gpio;
+ int ret;
+
+ tpd = devm_kzalloc(&pdev->dev, sizeof(*tpd), GFP_KERNEL);
+ if (!tpd)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, tpd);
+
+ tpd->bridge.funcs = &tpd12s015_bridge_funcs;
+ tpd->bridge.of_node = pdev->dev.of_node;
+ tpd->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+ tpd->bridge.ops = DRM_BRIDGE_OP_DETECT;
+
+ /* Get the next bridge, connected to port@1. */
+ node = of_graph_get_remote_node(pdev->dev.of_node, 1, -1);
+ if (!node)
+ return -ENODEV;
+
+ tpd->next_bridge = of_drm_find_bridge(node);
+ of_node_put(node);
+
+ if (!tpd->next_bridge)
+ return -EPROBE_DEFER;
+
+ /* Get the control and HPD GPIOs. */
+ gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ tpd->ct_cp_hpd_gpio = gpio;
+
+ gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ tpd->ls_oe_gpio = gpio;
+
+ gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2, GPIOD_IN);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ tpd->hpd_gpio = gpio;
+
+ /* Register the IRQ if the HPD GPIO is IRQ-capable. */
+ tpd->hpd_irq = gpiod_to_irq(tpd->hpd_gpio);
+ if (tpd->hpd_irq >= 0) {
+ ret = devm_request_threaded_irq(&pdev->dev, tpd->hpd_irq, NULL,
+ tpd12s015_hpd_isr,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "tpd12s015 hpd", tpd);
+ if (ret)
+ return ret;
+
+ tpd->bridge.ops |= DRM_BRIDGE_OP_HPD;
+ }
+
+ /* Register the DRM bridge. */
+ drm_bridge_add(&tpd->bridge);
+
+ return 0;
+}
+
+static int tpd12s015_remove(struct platform_device *pdev)
+{
+ struct tpd12s015_device *tpd = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&tpd->bridge);
+
+ return 0;
+}
+
+static const struct of_device_id tpd12s015_of_match[] = {
+ { .compatible = "ti,tpd12s015", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, tpd12s015_of_match);
+
+static struct platform_driver tpd12s015_driver = {
+ .probe = tpd12s015_probe,
+ .remove = tpd12s015_remove,
+ .driver = {
+ .name = "tpd12s015",
+ .of_match_table = tpd12s015_of_match,
+ },
+};
+
+module_platform_driver(tpd12s015_driver);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_DESCRIPTION("TPD12S015 HDMI level shifter and ESD protection driver");
+MODULE_LICENSE("GPL");