kernel_samsung_a34x-permissive/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c

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/*
* 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");