1 files changed, 416 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
new file mode 100644
index 000000000..ca30ed9da
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
@@ -0,0 +1,416 @@
+/*
+ * HDMI Connector driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/mutex.h>
+
+#include <drm/drm_edid.h>
+
+#include "../dss/omapdss.h"
+
+static const struct videomode hdmic_default_vm = {
+	.hactive	= 640,
+	.vactive	= 480,
+	.pixelclock	= 25175000,
+	.hsync_len	= 96,
+	.hfront_porch	= 16,
+	.hback_porch	= 48,
+	.vsync_len	= 2,
+	.vfront_porch	= 11,
+	.vback_porch	= 31,
+
+	.flags		= DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
+};
+
+struct panel_drv_data {
+	struct omap_dss_device dssdev;
+	struct omap_dss_device *in;
+	void (*hpd_cb)(void *cb_data, enum drm_connector_status status);
+	void *hpd_cb_data;
+	bool hpd_enabled;
+	struct mutex hpd_lock;
+
+	struct device *dev;
+
+	struct videomode vm;
+
+	int hpd_gpio;
+};
+
+#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
+
+static int hdmic_connect(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in;
+	int r;
+
+	dev_dbg(ddata->dev, "connect\n");
+
+	if (omapdss_device_is_connected(dssdev))
+		return 0;
+
+	in = omapdss_of_find_source_for_first_ep(ddata->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(ddata->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
+	r = in->ops.hdmi->connect(in, dssdev);
+	if (r) {
+		omap_dss_put_device(in);
+		return r;
+	}
+
+	ddata->in = in;
+	return 0;
+}
+
+static void hdmic_disconnect(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	dev_dbg(ddata->dev, "disconnect\n");
+
+	if (!omapdss_device_is_connected(dssdev))
+		return;
+
+	in->ops.hdmi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
+}
+
+static int hdmic_enable(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+	int r;
+
+	dev_dbg(ddata->dev, "enable\n");
+
+	if (!omapdss_device_is_connected(dssdev))
+		return -ENODEV;
+
+	if (omapdss_device_is_enabled(dssdev))
+		return 0;
+
+	in->ops.hdmi->set_timings(in, &ddata->vm);
+
+	r = in->ops.hdmi->enable(in);
+	if (r)
+		return r;
+
+	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+	return r;
+}
+
+static void hdmic_disable(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	dev_dbg(ddata->dev, "disable\n");
+
+	if (!omapdss_device_is_enabled(dssdev))
+		return;
+
+	in->ops.hdmi->disable(in);
+
+	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void hdmic_set_timings(struct omap_dss_device *dssdev,
+			      struct videomode *vm)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	ddata->vm = *vm;
+	dssdev->panel.vm = *vm;
+
+	in->ops.hdmi->set_timings(in, vm);
+}
+
+static void hdmic_get_timings(struct omap_dss_device *dssdev,
+			      struct videomode *vm)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	*vm = ddata->vm;
+}
+
+static int hdmic_check_timings(struct omap_dss_device *dssdev,
+			       struct videomode *vm)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	return in->ops.hdmi->check_timings(in, vm);
+}
+
+static int hdmic_read_edid(struct omap_dss_device *dssdev,
+		u8 *edid, int len)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	return in->ops.hdmi->read_edid(in, edid, len);
+}
+
+static bool hdmic_detect(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+	bool connected;
+
+	if (gpio_is_valid(ddata->hpd_gpio))
+		connected = gpio_get_value_cansleep(ddata->hpd_gpio);
+	else
+		connected = in->ops.hdmi->detect(in);
+	if (!connected && in->ops.hdmi->lost_hotplug)
+		in->ops.hdmi->lost_hotplug(in);
+	return connected;
+}
+
+static int hdmic_register_hpd_cb(struct omap_dss_device *dssdev,
+				 void (*cb)(void *cb_data,
+					    enum drm_connector_status status),
+				 void *cb_data)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	if (gpio_is_valid(ddata->hpd_gpio)) {
+		mutex_lock(&ddata->hpd_lock);
+		ddata->hpd_cb = cb;
+		ddata->hpd_cb_data = cb_data;
+		mutex_unlock(&ddata->hpd_lock);
+		return 0;
+	} else if (in->ops.hdmi->register_hpd_cb) {
+		return in->ops.hdmi->register_hpd_cb(in, cb, cb_data);
+	}
+
+	return -ENOTSUPP;
+}
+
+static void hdmic_unregister_hpd_cb(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	if (gpio_is_valid(ddata->hpd_gpio)) {
+		mutex_lock(&ddata->hpd_lock);
+		ddata->hpd_cb = NULL;
+		ddata->hpd_cb_data = NULL;
+		mutex_unlock(&ddata->hpd_lock);
+	} else if (in->ops.hdmi->unregister_hpd_cb) {
+		in->ops.hdmi->unregister_hpd_cb(in);
+	}
+}
+
+static void hdmic_enable_hpd(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	if (gpio_is_valid(ddata->hpd_gpio)) {
+		mutex_lock(&ddata->hpd_lock);
+		ddata->hpd_enabled = true;
+		mutex_unlock(&ddata->hpd_lock);
+	} else if (in->ops.hdmi->enable_hpd) {
+		in->ops.hdmi->enable_hpd(in);
+	}
+}
+
+static void hdmic_disable_hpd(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	if (gpio_is_valid(ddata->hpd_gpio)) {
+		mutex_lock(&ddata->hpd_lock);
+		ddata->hpd_enabled = false;
+		mutex_unlock(&ddata->hpd_lock);
+	} else if (in->ops.hdmi->disable_hpd) {
+		in->ops.hdmi->disable_hpd(in);
+	}
+}
+
+static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
+}
+
+static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
+		const struct hdmi_avi_infoframe *avi)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	return in->ops.hdmi->set_infoframe(in, avi);
+}
+
+static struct omap_dss_driver hdmic_driver = {
+	.connect		= hdmic_connect,
+	.disconnect		= hdmic_disconnect,
+
+	.enable			= hdmic_enable,
+	.disable		= hdmic_disable,
+
+	.set_timings		= hdmic_set_timings,
+	.get_timings		= hdmic_get_timings,
+	.check_timings		= hdmic_check_timings,
+
+	.read_edid		= hdmic_read_edid,
+	.detect			= hdmic_detect,
+	.register_hpd_cb	= hdmic_register_hpd_cb,
+	.unregister_hpd_cb	= hdmic_unregister_hpd_cb,
+	.enable_hpd		= hdmic_enable_hpd,
+	.disable_hpd		= hdmic_disable_hpd,
+	.set_hdmi_mode		= hdmic_set_hdmi_mode,
+	.set_hdmi_infoframe	= hdmic_set_infoframe,
+};
+
+static irqreturn_t hdmic_hpd_isr(int irq, void *data)
+{
+	struct panel_drv_data *ddata = data;
+
+	mutex_lock(&ddata->hpd_lock);
+	if (ddata->hpd_enabled && ddata->hpd_cb) {
+		enum drm_connector_status status;
+
+		if (hdmic_detect(&ddata->dssdev))
+			status = connector_status_connected;
+		else
+			status = connector_status_disconnected;
+
+		ddata->hpd_cb(ddata->hpd_cb_data, status);
+	}
+	mutex_unlock(&ddata->hpd_lock);
+
+	return IRQ_HANDLED;
+}
+
+static int hdmic_probe_of(struct platform_device *pdev)
+{
+	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+	struct device_node *node = pdev->dev.of_node;
+	int gpio;
+
+	/* HPD GPIO */
+	gpio = of_get_named_gpio(node, "hpd-gpios", 0);
+	if (gpio_is_valid(gpio))
+		ddata->hpd_gpio = gpio;
+	else
+		ddata->hpd_gpio = -ENODEV;
+
+	return 0;
+}
+
+static int hdmic_probe(struct platform_device *pdev)
+{
+	struct panel_drv_data *ddata;
+	struct omap_dss_device *dssdev;
+	int r;
+
+	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+	if (!ddata)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, ddata);
+	ddata->dev = &pdev->dev;
+
+	r = hdmic_probe_of(pdev);
+	if (r)
+		return r;
+
+	mutex_init(&ddata->hpd_lock);
+
+	if (gpio_is_valid(ddata->hpd_gpio)) {
+		r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
+				GPIOF_DIR_IN, "hdmi_hpd");
+		if (r)
+			return r;
+
+		r = devm_request_threaded_irq(&pdev->dev,
+				gpio_to_irq(ddata->hpd_gpio),
+				NULL, hdmic_hpd_isr,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+				IRQF_ONESHOT,
+				"hdmic hpd", ddata);
+		if (r)
+			return r;
+	}
+
+	ddata->vm = hdmic_default_vm;
+
+	dssdev = &ddata->dssdev;
+	dssdev->driver = &hdmic_driver;
+	dssdev->dev = &pdev->dev;
+	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
+	dssdev->owner = THIS_MODULE;
+	dssdev->panel.vm = hdmic_default_vm;
+
+	r = omapdss_register_display(dssdev);
+	if (r) {
+		dev_err(&pdev->dev, "Failed to register panel\n");
+		return r;
+	}
+
+	return 0;
+}
+
+static int __exit hdmic_remove(struct platform_device *pdev)
+{
+	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+	struct omap_dss_device *dssdev = &ddata->dssdev;
+
+	omapdss_unregister_display(&ddata->dssdev);
+
+	hdmic_disable(dssdev);
+	hdmic_disconnect(dssdev);
+
+	return 0;
+}
+
+static const struct of_device_id hdmic_of_match[] = {
+	{ .compatible = "omapdss,hdmi-connector", },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, hdmic_of_match);
+
+static struct platform_driver hdmi_connector_driver = {
+	.probe	= hdmic_probe,
+	.remove	= __exit_p(hdmic_remove),
+	.driver	= {
+		.name	= "connector-hdmi",
+		.of_match_table = hdmic_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+
+module_platform_driver(hdmi_connector_driver);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_DESCRIPTION("HDMI Connector driver");
+MODULE_LICENSE("GPL");