summaryrefslogtreecommitdiff
path: root/arch/arm/mach-tegra/panel-c-lvds-1366-14.c
blob: cc9a3ba8bb738e07251e38b9b6956aaff8564add (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
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
/*
 * arch/arm/mach-tegra/panel-c-lvds-1366-4.c
 *
 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <mach/dc.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/tegra_pwm_bl.h>
#include <linux/regulator/consumer.h>
#include <linux/pwm_backlight.h>
#include <linux/max8831_backlight.h>
#include <linux/leds.h>
#include <linux/ioport.h>
#include "board.h"
#include "board-panel.h"
#include "devices.h"
#include "gpio-names.h"
#include "tegra12_host1x_devices.h"

#define DC_CTRL_MODE	TEGRA_DC_OUT_CONTINUOUS_MODE

#ifdef CONFIG_MACH_APALIS_TK1
#define LVDS_PANEL_BL_PWM	TEGRA_GPIO_PU6
#else
#define LVDS_PANEL_BL_PWM	TEGRA_GPIO_PH1
#endif

static bool reg_requested;
static bool gpio_requested;
static struct platform_device *disp_device;

static struct regulator *vdd_lcd_bl;
static struct regulator *vdd_lcd_bl_en;
static struct regulator *avdd_lcd;
static struct regulator *vdd_ds_1v8;
static struct regulator	*dvdd_lcd_1v8;

static struct tegra_dc_sd_settings lvds_c_1366_14_sd_settings = {
	.enable = 1, /* enabled by default. */
	.use_auto_pwm = false,
	.hw_update_delay = 0,
	.bin_width = -1,
	.aggressiveness = 5,
	.use_vid_luma = false,
	.phase_in_adjustments = 0,
	.k_limit_enable = true,
	.k_limit = 200,
	.sd_window_enable = false,
	.soft_clipping_enable = true,
	/* Low soft clipping threshold to compensate for aggressive k_limit */
	.soft_clipping_threshold = 128,
	.smooth_k_enable = false,
	.smooth_k_incr = 64,
	/* Default video coefficients */
	.coeff = {5, 9, 2},
	.fc = {0, 0},
	/* Immediate backlight changes */
	.blp = {1024, 255},
	/* Gammas: R: 2.2 G: 2.2 B: 2.2 */
	/* Default BL TF */
	.bltf = {
			{
				{57, 65, 73, 82},
				{92, 103, 114, 125},
				{138, 150, 164, 178},
				{193, 208, 224, 241},
			},
		},
	/* Default LUT */
	.lut = {
			{
				{255, 255, 255},
				{199, 199, 199},
				{153, 153, 153},
				{116, 116, 116},
				{85, 85, 85},
				{59, 59, 59},
				{36, 36, 36},
				{17, 17, 17},
				{0, 0, 0},
			},
		},
	.sd_brightness = &sd_brightness,
	.use_vpulse2 = true,
};

static tegra_dc_bl_output lvds_c_1366_14_bl_output_measured = {
	/*  TODO: linear backlight calibration */
	0,   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, 253, 254, 255
};

static int laguna_lvds_regulator_get(struct device *dev)
{
	int err = 0;

	if (reg_requested)
		return 0;

	vdd_ds_1v8 = regulator_get(dev, "vdd_ds_1v8");
	if (IS_ERR(vdd_ds_1v8)) {
		pr_err("vdd_ds_1v8 regulator get failed\n");
		err = PTR_ERR(vdd_ds_1v8);
		vdd_ds_1v8 = NULL;
		goto fail;
	}

	vdd_lcd_bl = regulator_get(dev, "vdd_lcd_bl");
	if (IS_ERR(vdd_lcd_bl)) {
		pr_err("vdd_lcd_bl regulator get failed\n");
		err = PTR_ERR(vdd_lcd_bl);
		vdd_lcd_bl = NULL;
		goto fail;
	}

	vdd_lcd_bl_en = regulator_get(dev, "vdd_lcd_bl_en");
	if (IS_ERR(vdd_lcd_bl_en)) {
		pr_err("vdd_lcd_bl_en regulator get failed\n");
		err = PTR_ERR(vdd_lcd_bl_en);
		vdd_lcd_bl_en = NULL;
		goto fail;
	}

	avdd_lcd = regulator_get(dev, "avdd_lcd");
	if (IS_ERR(avdd_lcd)) {
		pr_err("avdd_lcd regulator get failed\n");
		err = PTR_ERR(avdd_lcd);
		avdd_lcd = NULL;
		goto fail;
	}

	dvdd_lcd_1v8 = regulator_get(dev, "dvdd_lcd");
	if (IS_ERR(dvdd_lcd_1v8)) {
		pr_err("dvdd_lcd regulator get failed\n");
		err = PTR_ERR(dvdd_lcd_1v8);
		dvdd_lcd_1v8 = NULL;
		goto fail;
	}

	reg_requested = true;
	return 0;
fail:
	return err;
}

static int laguna_lvds_gpio_get(void)
{
	int err = 0;

	if (gpio_requested)
		return 0;

	err = gpio_request(LVDS_PANEL_BL_PWM, "panel pwm");
	if (err < 0) {
		pr_err("panel pwm gpio request failed\n");
		goto fail;
	}
	gpio_free(LVDS_PANEL_BL_PWM);

	gpio_requested = true;
	return 0;
fail:
	return err;
}

static int lvds_c_1366_14_enable(struct device *dev)
{
	int err = 0;

	err = laguna_lvds_regulator_get(dev);
	if (err < 0) {
		pr_err("lvds regulator get failed\n");
		goto fail;
	}

	err = laguna_lvds_gpio_get();
	if (err < 0) {
		pr_err("lvds gpio request failed\n");
		goto fail;
	}

	if (vdd_lcd_bl) {
		err = regulator_enable(vdd_lcd_bl);
		if (err < 0) {
			pr_err("vdd_lcd_bl regulator enable failed\n");
			goto fail;
		}
	}

	msleep(20);

	if (vdd_ds_1v8) {
		err = regulator_enable(vdd_ds_1v8);
		if (err < 0) {
			pr_err("vdd_ds_1v8 regulator enable failed\n");
			goto fail;
		}
	}

	if (avdd_lcd) {
		err = regulator_enable(avdd_lcd);
		if (err < 0) {
			pr_err("avdd_lcd regulator enable failed\n");
			goto fail;
		}
	}

	msleep(10);

	if (vdd_lcd_bl_en) {
		err = regulator_enable(vdd_lcd_bl_en);
		if (err < 0) {
			pr_err("vdd_lcd_bl_en regulator enable failed\n");
			goto fail;
		}
	}

	if (dvdd_lcd_1v8) {
		err = regulator_enable(dvdd_lcd_1v8);
		if (err < 0) {
			pr_err("dvdd_lcd_1v8 regulator enable failed\n");
			goto fail;
		}
	}

	return 0;
fail:
	return err;
}

static int lvds_c_1366_14_disable(void)
{
	if (vdd_lcd_bl_en)
		regulator_disable(vdd_lcd_bl_en);

	msleep(10);

	if (avdd_lcd)
		regulator_disable(avdd_lcd);

	if (vdd_ds_1v8)
		regulator_disable(vdd_ds_1v8);

	msleep(10);

	if (vdd_lcd_bl)
		regulator_disable(vdd_lcd_bl);

	msleep(500);

	return 0;
}

static int lvds_c_1366_14_postsuspend(void)
{
	return 0;
}

static struct tegra_dc_out_pin lvds_out_pins[] = {
	{
		.name   = TEGRA_DC_OUT_PIN_H_SYNC,
		.pol    = TEGRA_DC_OUT_PIN_POL_LOW,
	},
	{
		.name   = TEGRA_DC_OUT_PIN_V_SYNC,
		.pol    = TEGRA_DC_OUT_PIN_POL_LOW,
	},
	{
		.name   = TEGRA_DC_OUT_PIN_PIXEL_CLOCK,
		.pol    = TEGRA_DC_OUT_PIN_POL_LOW,
	},
	{
		.name   = TEGRA_DC_OUT_PIN_DATA_ENABLE,
		.pol    = TEGRA_DC_OUT_PIN_POL_HIGH,
	},
};

static int lvds_c_1366_14_bl_notify(struct device *unused, int brightness)
{
	int cur_sd_brightness = atomic_read(&sd_brightness);

	/* SD brightness is a percentage */
	brightness = (brightness * cur_sd_brightness) / 255;

	/* Apply any backlight response curve */
	if (brightness > 255)
		pr_info("Error: Brightness > 255!\n");
	else
		brightness = lvds_c_1366_14_bl_output_measured[brightness];

	return brightness;
}

static int lvds_c_1366_14_check_fb(struct device *dev, struct fb_info *info)
{
	return info->device == &disp_device->dev;
}

static struct platform_pwm_backlight_data lvds_c_1366_14_bl_data = {
#ifdef CONFIG_MACH_APALIS_TK1
	.pwm_id		= 3,
#else
	.pwm_id		= 1,
#endif
	.max_brightness	= 255,
	.dft_brightness	= 224,
	.pwm_period_ns	= 1000000,
	.pwm_gpio	= TEGRA_GPIO_INVALID,
	.notify		= lvds_c_1366_14_bl_notify,
	/* Only toggle backlight on fb blank notifications for disp1 */
	.check_fb	= lvds_c_1366_14_check_fb,
};

static struct platform_device __maybe_unused
		lvds_c_1366_14_bl_device = {
	.name	= "pwm-backlight",
	.id	= -1,
	.dev	= {
		.platform_data = &lvds_c_1366_14_bl_data,
	},
};

static struct platform_device __maybe_unused
			*lvds_c_1366_14_bl_devices[] __initdata = {
	&lvds_c_1366_14_bl_device,
};

static int  __init lvds_c_1366_14_register_bl_dev(void)
{
	int err = 0;
	err = platform_add_devices(lvds_c_1366_14_bl_devices,
				ARRAY_SIZE(lvds_c_1366_14_bl_devices));
	if (err) {
		pr_err("disp1 bl device registration failed");
		return err;
	}
	return err;
}

static void lvds_c_1366_14_set_disp_device(
	struct platform_device *laguna_display_device)
{
	disp_device = laguna_display_device;
}

static void lvds_c_1366_14_dc_out_init(struct tegra_dc_out *dc)
{
	dc->align = TEGRA_DC_ALIGN_MSB,
	dc->order = TEGRA_DC_ORDER_RED_BLUE,
	dc->flags = DC_CTRL_MODE;
	dc->out_pins = lvds_out_pins,
	dc->n_out_pins = ARRAY_SIZE(lvds_out_pins),
	dc->depth = 18,
	dc->parent_clk = "pll_d_out0";
	dc->enable = lvds_c_1366_14_enable;
	dc->disable = lvds_c_1366_14_disable;
	dc->postsuspend	= lvds_c_1366_14_postsuspend,
	dc->width = 309;
	dc->height = 174;
}

static void
lvds_c_1366_14_sd_settings_init(struct tegra_dc_sd_settings *settings)
{
	*settings = lvds_c_1366_14_sd_settings;
	settings->bl_device_name = "pwm-backlight";
}

struct tegra_panel __initdata lvds_c_1366_14 = {
	.init_sd_settings = lvds_c_1366_14_sd_settings_init,
	.init_dc_out = lvds_c_1366_14_dc_out_init,
	.register_bl_dev = lvds_c_1366_14_register_bl_dev,
	.set_disp_device = lvds_c_1366_14_set_disp_device,
};
EXPORT_SYMBOL(lvds_c_1366_14);