2012-11-16 05:28:22 +08:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2012 Avionic Design GmbH
|
|
|
|
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
|
|
|
|
*
|
|
|
|
* 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/of_gpio.h>
|
|
|
|
|
|
|
|
#include "drm.h"
|
|
|
|
|
|
|
|
static int tegra_connector_get_modes(struct drm_connector *connector)
|
|
|
|
{
|
|
|
|
struct tegra_output *output = connector_to_output(connector);
|
|
|
|
struct edid *edid = NULL;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (output->edid)
|
|
|
|
edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
|
|
|
|
else if (output->ddc)
|
|
|
|
edid = drm_get_edid(connector, output->ddc);
|
|
|
|
|
|
|
|
drm_mode_connector_update_edid_property(connector, edid);
|
|
|
|
|
|
|
|
if (edid) {
|
|
|
|
err = drm_add_edid_modes(connector, edid);
|
|
|
|
kfree(edid);
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tegra_connector_mode_valid(struct drm_connector *connector,
|
|
|
|
struct drm_display_mode *mode)
|
|
|
|
{
|
|
|
|
struct tegra_output *output = connector_to_output(connector);
|
|
|
|
enum drm_mode_status status = MODE_OK;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = tegra_output_check_mode(output, mode, &status);
|
|
|
|
if (err < 0)
|
|
|
|
return MODE_ERROR;
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct drm_encoder *
|
|
|
|
tegra_connector_best_encoder(struct drm_connector *connector)
|
|
|
|
{
|
|
|
|
struct tegra_output *output = connector_to_output(connector);
|
|
|
|
|
|
|
|
return &output->encoder;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct drm_connector_helper_funcs connector_helper_funcs = {
|
|
|
|
.get_modes = tegra_connector_get_modes,
|
|
|
|
.mode_valid = tegra_connector_mode_valid,
|
|
|
|
.best_encoder = tegra_connector_best_encoder,
|
|
|
|
};
|
|
|
|
|
|
|
|
static enum drm_connector_status
|
|
|
|
tegra_connector_detect(struct drm_connector *connector, bool force)
|
|
|
|
{
|
|
|
|
struct tegra_output *output = connector_to_output(connector);
|
|
|
|
enum drm_connector_status status = connector_status_unknown;
|
|
|
|
|
|
|
|
if (gpio_is_valid(output->hpd_gpio)) {
|
|
|
|
if (gpio_get_value(output->hpd_gpio) == 0)
|
|
|
|
status = connector_status_disconnected;
|
|
|
|
else
|
|
|
|
status = connector_status_connected;
|
|
|
|
} else {
|
|
|
|
if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
|
|
|
|
status = connector_status_connected;
|
|
|
|
}
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2013-10-14 20:06:02 +08:00
|
|
|
static void drm_connector_clear(struct drm_connector *connector)
|
|
|
|
{
|
|
|
|
memset(connector, 0, sizeof(*connector));
|
|
|
|
}
|
|
|
|
|
2012-11-16 05:28:22 +08:00
|
|
|
static void tegra_connector_destroy(struct drm_connector *connector)
|
|
|
|
{
|
|
|
|
drm_sysfs_connector_remove(connector);
|
|
|
|
drm_connector_cleanup(connector);
|
2013-10-14 20:06:02 +08:00
|
|
|
drm_connector_clear(connector);
|
2012-11-16 05:28:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct drm_connector_funcs connector_funcs = {
|
|
|
|
.dpms = drm_helper_connector_dpms,
|
|
|
|
.detect = tegra_connector_detect,
|
|
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
|
|
.destroy = tegra_connector_destroy,
|
|
|
|
};
|
|
|
|
|
2013-10-14 20:06:02 +08:00
|
|
|
static void drm_encoder_clear(struct drm_encoder *encoder)
|
|
|
|
{
|
|
|
|
memset(encoder, 0, sizeof(*encoder));
|
|
|
|
}
|
|
|
|
|
2012-11-16 05:28:22 +08:00
|
|
|
static void tegra_encoder_destroy(struct drm_encoder *encoder)
|
|
|
|
{
|
|
|
|
drm_encoder_cleanup(encoder);
|
2013-10-14 20:06:02 +08:00
|
|
|
drm_encoder_clear(encoder);
|
2012-11-16 05:28:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct drm_encoder_funcs encoder_funcs = {
|
|
|
|
.destroy = tegra_encoder_destroy,
|
|
|
|
};
|
|
|
|
|
|
|
|
static void tegra_encoder_dpms(struct drm_encoder *encoder, int mode)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool tegra_encoder_mode_fixup(struct drm_encoder *encoder,
|
|
|
|
const struct drm_display_mode *mode,
|
|
|
|
struct drm_display_mode *adjusted)
|
|
|
|
{
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void tegra_encoder_prepare(struct drm_encoder *encoder)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static void tegra_encoder_commit(struct drm_encoder *encoder)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static void tegra_encoder_mode_set(struct drm_encoder *encoder,
|
|
|
|
struct drm_display_mode *mode,
|
|
|
|
struct drm_display_mode *adjusted)
|
|
|
|
{
|
|
|
|
struct tegra_output *output = encoder_to_output(encoder);
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = tegra_output_enable(output);
|
|
|
|
if (err < 0)
|
|
|
|
dev_err(encoder->dev->dev, "tegra_output_enable(): %d\n", err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
|
|
|
|
.dpms = tegra_encoder_dpms,
|
|
|
|
.mode_fixup = tegra_encoder_mode_fixup,
|
|
|
|
.prepare = tegra_encoder_prepare,
|
|
|
|
.commit = tegra_encoder_commit,
|
|
|
|
.mode_set = tegra_encoder_mode_set,
|
|
|
|
};
|
|
|
|
|
|
|
|
static irqreturn_t hpd_irq(int irq, void *data)
|
|
|
|
{
|
|
|
|
struct tegra_output *output = data;
|
|
|
|
|
|
|
|
drm_helper_hpd_irq_event(output->connector.dev);
|
|
|
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
2013-10-14 20:26:42 +08:00
|
|
|
int tegra_output_probe(struct tegra_output *output)
|
2012-11-16 05:28:22 +08:00
|
|
|
{
|
|
|
|
enum of_gpio_flags flags;
|
|
|
|
struct device_node *ddc;
|
|
|
|
size_t size;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!output->of_node)
|
|
|
|
output->of_node = output->dev->of_node;
|
|
|
|
|
|
|
|
output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
|
|
|
|
|
|
|
|
ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
|
|
|
|
if (ddc) {
|
|
|
|
output->ddc = of_find_i2c_adapter_by_node(ddc);
|
|
|
|
if (!output->ddc) {
|
|
|
|
err = -EPROBE_DEFER;
|
|
|
|
of_node_put(ddc);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
of_node_put(ddc);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!output->edid && !output->ddc)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
|
|
|
|
"nvidia,hpd-gpio", 0,
|
|
|
|
&flags);
|
|
|
|
if (gpio_is_valid(output->hpd_gpio)) {
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN,
|
|
|
|
"HDMI hotplug detect");
|
|
|
|
if (err < 0) {
|
|
|
|
dev_err(output->dev, "gpio_request_one(): %d\n", err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = gpio_to_irq(output->hpd_gpio);
|
|
|
|
if (err < 0) {
|
|
|
|
dev_err(output->dev, "gpio_to_irq(): %d\n", err);
|
2013-10-14 20:26:42 +08:00
|
|
|
gpio_free(output->hpd_gpio);
|
|
|
|
return err;
|
2012-11-16 05:28:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
output->hpd_irq = err;
|
|
|
|
|
|
|
|
flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
|
|
|
|
IRQF_ONESHOT;
|
|
|
|
|
|
|
|
err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
|
|
|
|
flags, "hpd", output);
|
|
|
|
if (err < 0) {
|
|
|
|
dev_err(output->dev, "failed to request IRQ#%u: %d\n",
|
|
|
|
output->hpd_irq, err);
|
2013-10-14 20:26:42 +08:00
|
|
|
gpio_free(output->hpd_gpio);
|
|
|
|
return err;
|
2012-11-16 05:28:22 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
output->connector.polled = DRM_CONNECTOR_POLL_HPD;
|
|
|
|
}
|
|
|
|
|
2013-10-14 20:26:42 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int tegra_output_remove(struct tegra_output *output)
|
|
|
|
{
|
|
|
|
if (gpio_is_valid(output->hpd_gpio)) {
|
|
|
|
free_irq(output->hpd_irq, output);
|
|
|
|
gpio_free(output->hpd_gpio);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (output->ddc)
|
|
|
|
put_device(&output->ddc->dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
|
|
|
|
{
|
|
|
|
int connector, encoder;
|
|
|
|
|
2012-11-16 05:28:22 +08:00
|
|
|
switch (output->type) {
|
|
|
|
case TEGRA_OUTPUT_RGB:
|
|
|
|
connector = DRM_MODE_CONNECTOR_LVDS;
|
|
|
|
encoder = DRM_MODE_ENCODER_LVDS;
|
|
|
|
break;
|
|
|
|
|
2012-11-16 05:28:23 +08:00
|
|
|
case TEGRA_OUTPUT_HDMI:
|
|
|
|
connector = DRM_MODE_CONNECTOR_HDMIA;
|
|
|
|
encoder = DRM_MODE_ENCODER_TMDS;
|
|
|
|
break;
|
|
|
|
|
2012-11-16 05:28:22 +08:00
|
|
|
default:
|
|
|
|
connector = DRM_MODE_CONNECTOR_Unknown;
|
|
|
|
encoder = DRM_MODE_ENCODER_NONE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
drm_connector_init(drm, &output->connector, &connector_funcs,
|
|
|
|
connector);
|
|
|
|
drm_connector_helper_add(&output->connector, &connector_helper_funcs);
|
2013-09-24 15:58:08 +08:00
|
|
|
output->connector.dpms = DRM_MODE_DPMS_OFF;
|
2012-11-16 05:28:22 +08:00
|
|
|
|
|
|
|
drm_encoder_init(drm, &output->encoder, &encoder_funcs, encoder);
|
|
|
|
drm_encoder_helper_add(&output->encoder, &encoder_helper_funcs);
|
|
|
|
|
|
|
|
drm_mode_connector_attach_encoder(&output->connector, &output->encoder);
|
|
|
|
drm_sysfs_connector_add(&output->connector);
|
|
|
|
|
|
|
|
output->encoder.possible_crtcs = 0x3;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int tegra_output_exit(struct tegra_output *output)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|