aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/msm/mddi_client_nt35399.c
blob: f96df32e5509a4581209cb867827c2ba35c68305 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
/* drivers/video/msm_fb/mddi_client_nt35399.c
 *
 * Support for Novatek NT35399 MDDI client of Sapphire
 *
 * Copyright (C) 2008 HTC Incorporated
 * Author: Solomon Chiu (solomon_chiu@htc.com)
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/platform_data/video-msm_fb.h>

static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait);

struct panel_info {
	struct msm_mddi_client_data *client_data;
	struct platform_device pdev;
	struct msm_panel_data panel_data;
	struct msmfb_callback *fb_callback;
	struct work_struct panel_work;
	struct workqueue_struct *fb_wq;
	int nt35399_got_int;
};

static void
nt35399_request_vsync(struct msm_panel_data *panel_data,
		      struct msmfb_callback *callback)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	panel->fb_callback = callback;
	if (panel->nt35399_got_int) {
		panel->nt35399_got_int = 0;
		client_data->activate_link(client_data); /* clears interrupt */
	}
}

static void nt35399_wait_vsync(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	if (panel->nt35399_got_int) {
		panel->nt35399_got_int = 0;
		client_data->activate_link(client_data); /* clears interrupt */
	}

	if (wait_event_timeout(nt35399_vsync_wait, panel->nt35399_got_int,
				HZ/2) == 0)
		printk(KERN_ERR "timeout waiting for VSYNC\n");

	panel->nt35399_got_int = 0;
	/* interrupt clears when screen dma starts */
}

static int nt35399_suspend(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;
	int ret;

	ret = bridge_data->uninit(bridge_data, client_data);
	if (ret) {
		printk(KERN_INFO "mddi nt35399 client: non zero return from "
			"uninit\n");
		return ret;
	}
	client_data->suspend(client_data);
	return 0;
}

static int nt35399_resume(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;
	int ret;

	client_data->resume(client_data);
	ret = bridge_data->init(bridge_data, client_data);
	if (ret)
		return ret;
	return 0;
}

static int nt35399_blank(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;
	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;

	return bridge_data->blank(bridge_data, client_data);
}

static int nt35399_unblank(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;
	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;

	return bridge_data->unblank(bridge_data, client_data);
}

irqreturn_t nt35399_vsync_interrupt(int irq, void *data)
{
	struct panel_info *panel = data;

	panel->nt35399_got_int = 1;

	if (panel->fb_callback) {
		panel->fb_callback->func(panel->fb_callback);
		panel->fb_callback = NULL;
	}

	wake_up(&nt35399_vsync_wait);

	return IRQ_HANDLED;
}

static int setup_vsync(struct panel_info *panel, int init)
{
	int ret;
	int gpio = 97;
	unsigned int irq;

	if (!init) {
		ret = 0;
		goto uninit;
	}
	ret = gpio_request_one(gpio, GPIOF_IN, "vsync");
	if (ret)
		goto err_request_gpio_failed;

	ret = irq = gpio_to_irq(gpio);
	if (ret < 0)
		goto err_get_irq_num_failed;

	ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING,
			  "vsync", panel);
	if (ret)
		goto err_request_irq_failed;

	printk(KERN_INFO "vsync on gpio %d now %d\n",
	       gpio, gpio_get_value(gpio));
	return 0;

uninit:
	free_irq(gpio_to_irq(gpio), panel->client_data);
err_request_irq_failed:
err_get_irq_num_failed:
	gpio_free(gpio);
err_request_gpio_failed:
	return ret;
}

static int mddi_nt35399_probe(struct platform_device *pdev)
{
	struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;

	int ret;

	struct panel_info *panel = devm_kzalloc(&pdev->dev,
						sizeof(struct panel_info),
						GFP_KERNEL);

	printk(KERN_DEBUG "%s: enter.\n", __func__);

	if (!panel)
		return -ENOMEM;
	platform_set_drvdata(pdev, panel);

	ret = setup_vsync(panel, 1);
	if (ret) {
		dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n");
		return ret;
	}

	panel->client_data = client_data;
	panel->panel_data.suspend = nt35399_suspend;
	panel->panel_data.resume = nt35399_resume;
	panel->panel_data.wait_vsync = nt35399_wait_vsync;
	panel->panel_data.request_vsync = nt35399_request_vsync;
	panel->panel_data.blank = nt35399_blank;
	panel->panel_data.unblank = nt35399_unblank;
	panel->panel_data.fb_data = &bridge_data->fb_data;
	panel->panel_data.caps = 0;

	panel->pdev.name = "msm_panel";
	panel->pdev.id = pdev->id;
	panel->pdev.resource = client_data->fb_resource;
	panel->pdev.num_resources = 1;
	panel->pdev.dev.platform_data = &panel->panel_data;

	if (bridge_data->init)
		bridge_data->init(bridge_data, client_data);

	platform_device_register(&panel->pdev);

	return 0;
}

static int mddi_nt35399_remove(struct platform_device *pdev)
{
	struct panel_info *panel = platform_get_drvdata(pdev);

	setup_vsync(panel, 0);
	return 0;
}

static struct platform_driver mddi_client_0bda_8a47 = {
	.probe = mddi_nt35399_probe,
	.remove = mddi_nt35399_remove,
	.driver = { .name = "mddi_c_0bda_8a47" },
};

static int __init mddi_client_nt35399_init(void)
{
	return platform_driver_register(&mddi_client_0bda_8a47);
}

module_init(mddi_client_nt35399_init);