2 * TPO TD043MTEA1 Panel driver
4 * Author: Gražvydas Ignotas <notasas@gmail.com>
5 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
13 #include <linux/module.h>
14 #include <linux/delay.h>
15 #include <linux/spi/spi.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/gpio.h>
18 #include <linux/err.h>
19 #include <linux/slab.h>
20 #include <linux/of_gpio.h>
22 #include <video/omapdss.h>
23 #include <video/omap-panel-data.h>
25 #define TPO_R02_MODE(x) ((x) & 7)
26 #define TPO_R02_MODE_800x480 7
27 #define TPO_R02_NCLK_RISING BIT(3)
28 #define TPO_R02_HSYNC_HIGH BIT(4)
29 #define TPO_R02_VSYNC_HIGH BIT(5)
31 #define TPO_R03_NSTANDBY BIT(0)
32 #define TPO_R03_EN_CP_CLK BIT(1)
33 #define TPO_R03_EN_VGL_PUMP BIT(2)
34 #define TPO_R03_EN_PWM BIT(3)
35 #define TPO_R03_DRIVING_CAP_100 BIT(4)
36 #define TPO_R03_EN_PRE_CHARGE BIT(6)
37 #define TPO_R03_SOFTWARE_CTL BIT(7)
39 #define TPO_R04_NFLIP_H BIT(0)
40 #define TPO_R04_NFLIP_V BIT(1)
41 #define TPO_R04_CP_CLK_FREQ_1H BIT(2)
42 #define TPO_R04_VGL_FREQ_1H BIT(4)
44 #define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
45 TPO_R03_EN_VGL_PUMP | TPO_R03_EN_PWM | \
46 TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
49 #define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
50 TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)
52 static const u16 tpo_td043_def_gamma
[12] = {
53 105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023
56 struct panel_drv_data
{
57 struct omap_dss_device dssdev
;
58 struct omap_dss_device
*in
;
60 struct omap_video_timings videomode
;
64 struct spi_device
*spi
;
65 struct regulator
*vcc_reg
;
73 u32 power_on_resume
:1;
76 static const struct omap_video_timings tpo_td043_timings
= {
80 .pixelclock
= 36000000,
90 .vsync_level
= OMAPDSS_SIG_ACTIVE_LOW
,
91 .hsync_level
= OMAPDSS_SIG_ACTIVE_LOW
,
92 .data_pclk_edge
= OMAPDSS_DRIVE_SIG_FALLING_EDGE
,
93 .de_level
= OMAPDSS_SIG_ACTIVE_HIGH
,
94 .sync_pclk_edge
= OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES
,
97 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
99 static int tpo_td043_write(struct spi_device
*spi
, u8 addr
, u8 data
)
101 struct spi_message m
;
102 struct spi_transfer xfer
;
106 spi_message_init(&m
);
108 memset(&xfer
, 0, sizeof(xfer
));
110 w
= ((u16
)addr
<< 10) | (1 << 8) | data
;
112 xfer
.bits_per_word
= 16;
114 spi_message_add_tail(&xfer
, &m
);
116 r
= spi_sync(spi
, &m
);
118 dev_warn(&spi
->dev
, "failed to write to LCD reg (%d)\n", r
);
122 static void tpo_td043_write_gamma(struct spi_device
*spi
, u16 gamma
[12])
126 /* gamma bits [9:8] */
127 for (val
= i
= 0; i
< 4; i
++)
128 val
|= (gamma
[i
] & 0x300) >> ((i
+ 1) * 2);
129 tpo_td043_write(spi
, 0x11, val
);
131 for (val
= i
= 0; i
< 4; i
++)
132 val
|= (gamma
[i
+4] & 0x300) >> ((i
+ 1) * 2);
133 tpo_td043_write(spi
, 0x12, val
);
135 for (val
= i
= 0; i
< 4; i
++)
136 val
|= (gamma
[i
+8] & 0x300) >> ((i
+ 1) * 2);
137 tpo_td043_write(spi
, 0x13, val
);
139 /* gamma bits [7:0] */
140 for (val
= i
= 0; i
< 12; i
++)
141 tpo_td043_write(spi
, 0x14 + i
, gamma
[i
] & 0xff);
144 static int tpo_td043_write_mirror(struct spi_device
*spi
, bool h
, bool v
)
146 u8 reg4
= TPO_R04_NFLIP_H
| TPO_R04_NFLIP_V
|
147 TPO_R04_CP_CLK_FREQ_1H
| TPO_R04_VGL_FREQ_1H
;
149 reg4
&= ~TPO_R04_NFLIP_H
;
151 reg4
&= ~TPO_R04_NFLIP_V
;
153 return tpo_td043_write(spi
, 4, reg4
);
156 static int tpo_td043_set_hmirror(struct omap_dss_device
*dssdev
, bool enable
)
158 struct panel_drv_data
*ddata
= dev_get_drvdata(dssdev
->dev
);
160 ddata
->hmirror
= enable
;
161 return tpo_td043_write_mirror(ddata
->spi
, ddata
->hmirror
,
165 static bool tpo_td043_get_hmirror(struct omap_dss_device
*dssdev
)
167 struct panel_drv_data
*ddata
= dev_get_drvdata(dssdev
->dev
);
169 return ddata
->hmirror
;
172 static ssize_t
tpo_td043_vmirror_show(struct device
*dev
,
173 struct device_attribute
*attr
, char *buf
)
175 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
177 return snprintf(buf
, PAGE_SIZE
, "%d\n", ddata
->vmirror
);
180 static ssize_t
tpo_td043_vmirror_store(struct device
*dev
,
181 struct device_attribute
*attr
, const char *buf
, size_t count
)
183 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
187 ret
= kstrtoint(buf
, 0, &val
);
193 ret
= tpo_td043_write_mirror(ddata
->spi
, ddata
->hmirror
, val
);
197 ddata
->vmirror
= val
;
202 static ssize_t
tpo_td043_mode_show(struct device
*dev
,
203 struct device_attribute
*attr
, char *buf
)
205 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
207 return snprintf(buf
, PAGE_SIZE
, "%d\n", ddata
->mode
);
210 static ssize_t
tpo_td043_mode_store(struct device
*dev
,
211 struct device_attribute
*attr
, const char *buf
, size_t count
)
213 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
217 ret
= kstrtol(buf
, 0, &val
);
218 if (ret
!= 0 || val
& ~7)
223 val
|= TPO_R02_NCLK_RISING
;
224 tpo_td043_write(ddata
->spi
, 2, val
);
229 static ssize_t
tpo_td043_gamma_show(struct device
*dev
,
230 struct device_attribute
*attr
, char *buf
)
232 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
237 for (i
= 0; i
< ARRAY_SIZE(ddata
->gamma
); i
++) {
238 ret
= snprintf(buf
+ len
, PAGE_SIZE
- len
, "%u ",
249 static ssize_t
tpo_td043_gamma_store(struct device
*dev
,
250 struct device_attribute
*attr
, const char *buf
, size_t count
)
252 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
257 ret
= sscanf(buf
, "%u %u %u %u %u %u %u %u %u %u %u %u",
258 &g
[0], &g
[1], &g
[2], &g
[3], &g
[4], &g
[5],
259 &g
[6], &g
[7], &g
[8], &g
[9], &g
[10], &g
[11]);
264 for (i
= 0; i
< 12; i
++)
265 ddata
->gamma
[i
] = g
[i
];
267 tpo_td043_write_gamma(ddata
->spi
, ddata
->gamma
);
272 static DEVICE_ATTR(vmirror
, S_IRUGO
| S_IWUSR
,
273 tpo_td043_vmirror_show
, tpo_td043_vmirror_store
);
274 static DEVICE_ATTR(mode
, S_IRUGO
| S_IWUSR
,
275 tpo_td043_mode_show
, tpo_td043_mode_store
);
276 static DEVICE_ATTR(gamma
, S_IRUGO
| S_IWUSR
,
277 tpo_td043_gamma_show
, tpo_td043_gamma_store
);
279 static struct attribute
*tpo_td043_attrs
[] = {
280 &dev_attr_vmirror
.attr
,
282 &dev_attr_gamma
.attr
,
286 static struct attribute_group tpo_td043_attr_group
= {
287 .attrs
= tpo_td043_attrs
,
290 static int tpo_td043_power_on(struct panel_drv_data
*ddata
)
294 if (ddata
->powered_on
)
297 r
= regulator_enable(ddata
->vcc_reg
);
301 /* wait for panel to stabilize */
304 if (gpio_is_valid(ddata
->nreset_gpio
))
305 gpio_set_value(ddata
->nreset_gpio
, 1);
307 tpo_td043_write(ddata
->spi
, 2,
308 TPO_R02_MODE(ddata
->mode
) | TPO_R02_NCLK_RISING
);
309 tpo_td043_write(ddata
->spi
, 3, TPO_R03_VAL_NORMAL
);
310 tpo_td043_write(ddata
->spi
, 0x20, 0xf0);
311 tpo_td043_write(ddata
->spi
, 0x21, 0xf0);
312 tpo_td043_write_mirror(ddata
->spi
, ddata
->hmirror
,
314 tpo_td043_write_gamma(ddata
->spi
, ddata
->gamma
);
316 ddata
->powered_on
= 1;
320 static void tpo_td043_power_off(struct panel_drv_data
*ddata
)
322 if (!ddata
->powered_on
)
325 tpo_td043_write(ddata
->spi
, 3,
326 TPO_R03_VAL_STANDBY
| TPO_R03_EN_PWM
);
328 if (gpio_is_valid(ddata
->nreset_gpio
))
329 gpio_set_value(ddata
->nreset_gpio
, 0);
331 /* wait for at least 2 vsyncs before cutting off power */
334 tpo_td043_write(ddata
->spi
, 3, TPO_R03_VAL_STANDBY
);
336 regulator_disable(ddata
->vcc_reg
);
338 ddata
->powered_on
= 0;
341 static int tpo_td043_connect(struct omap_dss_device
*dssdev
)
343 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
344 struct omap_dss_device
*in
= ddata
->in
;
347 if (omapdss_device_is_connected(dssdev
))
350 r
= in
->ops
.dpi
->connect(in
, dssdev
);
357 static void tpo_td043_disconnect(struct omap_dss_device
*dssdev
)
359 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
360 struct omap_dss_device
*in
= ddata
->in
;
362 if (!omapdss_device_is_connected(dssdev
))
365 in
->ops
.dpi
->disconnect(in
, dssdev
);
368 static int tpo_td043_enable(struct omap_dss_device
*dssdev
)
370 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
371 struct omap_dss_device
*in
= ddata
->in
;
374 if (!omapdss_device_is_connected(dssdev
))
377 if (omapdss_device_is_enabled(dssdev
))
380 if (ddata
->data_lines
)
381 in
->ops
.dpi
->set_data_lines(in
, ddata
->data_lines
);
382 in
->ops
.dpi
->set_timings(in
, &ddata
->videomode
);
384 r
= in
->ops
.dpi
->enable(in
);
389 * If we are resuming from system suspend, SPI clocks might not be
390 * enabled yet, so we'll program the LCD from SPI PM resume callback.
392 if (!ddata
->spi_suspended
) {
393 r
= tpo_td043_power_on(ddata
);
395 in
->ops
.dpi
->disable(in
);
400 dssdev
->state
= OMAP_DSS_DISPLAY_ACTIVE
;
405 static void tpo_td043_disable(struct omap_dss_device
*dssdev
)
407 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
408 struct omap_dss_device
*in
= ddata
->in
;
410 if (!omapdss_device_is_enabled(dssdev
))
413 in
->ops
.dpi
->disable(in
);
415 if (!ddata
->spi_suspended
)
416 tpo_td043_power_off(ddata
);
418 dssdev
->state
= OMAP_DSS_DISPLAY_DISABLED
;
421 static void tpo_td043_set_timings(struct omap_dss_device
*dssdev
,
422 struct omap_video_timings
*timings
)
424 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
425 struct omap_dss_device
*in
= ddata
->in
;
427 ddata
->videomode
= *timings
;
428 dssdev
->panel
.timings
= *timings
;
430 in
->ops
.dpi
->set_timings(in
, timings
);
433 static void tpo_td043_get_timings(struct omap_dss_device
*dssdev
,
434 struct omap_video_timings
*timings
)
436 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
438 *timings
= ddata
->videomode
;
441 static int tpo_td043_check_timings(struct omap_dss_device
*dssdev
,
442 struct omap_video_timings
*timings
)
444 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
445 struct omap_dss_device
*in
= ddata
->in
;
447 return in
->ops
.dpi
->check_timings(in
, timings
);
450 static struct omap_dss_driver tpo_td043_ops
= {
451 .connect
= tpo_td043_connect
,
452 .disconnect
= tpo_td043_disconnect
,
454 .enable
= tpo_td043_enable
,
455 .disable
= tpo_td043_disable
,
457 .set_timings
= tpo_td043_set_timings
,
458 .get_timings
= tpo_td043_get_timings
,
459 .check_timings
= tpo_td043_check_timings
,
461 .set_mirror
= tpo_td043_set_hmirror
,
462 .get_mirror
= tpo_td043_get_hmirror
,
464 .get_resolution
= omapdss_default_get_resolution
,
468 static int tpo_td043_probe_pdata(struct spi_device
*spi
)
470 const struct panel_tpo_td043mtea1_platform_data
*pdata
;
471 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
472 struct omap_dss_device
*dssdev
, *in
;
474 pdata
= dev_get_platdata(&spi
->dev
);
476 ddata
->nreset_gpio
= pdata
->nreset_gpio
;
478 in
= omap_dss_find_output(pdata
->source
);
480 dev_err(&spi
->dev
, "failed to find video source '%s'\n",
482 return -EPROBE_DEFER
;
486 ddata
->data_lines
= pdata
->data_lines
;
488 dssdev
= &ddata
->dssdev
;
489 dssdev
->name
= pdata
->name
;
494 static int tpo_td043_probe_of(struct spi_device
*spi
)
496 struct device_node
*node
= spi
->dev
.of_node
;
497 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
498 struct omap_dss_device
*in
;
501 gpio
= of_get_named_gpio(node
, "reset-gpios", 0);
502 if (!gpio_is_valid(gpio
)) {
503 dev_err(&spi
->dev
, "failed to parse enable gpio\n");
506 ddata
->nreset_gpio
= gpio
;
508 in
= omapdss_of_find_source_for_first_ep(node
);
510 dev_err(&spi
->dev
, "failed to find video source\n");
519 static int tpo_td043_probe(struct spi_device
*spi
)
521 struct panel_drv_data
*ddata
;
522 struct omap_dss_device
*dssdev
;
525 dev_dbg(&spi
->dev
, "%s\n", __func__
);
527 spi
->bits_per_word
= 16;
528 spi
->mode
= SPI_MODE_0
;
532 dev_err(&spi
->dev
, "spi_setup failed: %d\n", r
);
536 ddata
= devm_kzalloc(&spi
->dev
, sizeof(*ddata
), GFP_KERNEL
);
540 dev_set_drvdata(&spi
->dev
, ddata
);
544 if (dev_get_platdata(&spi
->dev
)) {
545 r
= tpo_td043_probe_pdata(spi
);
548 } else if (spi
->dev
.of_node
) {
549 r
= tpo_td043_probe_of(spi
);
556 ddata
->mode
= TPO_R02_MODE_800x480
;
557 memcpy(ddata
->gamma
, tpo_td043_def_gamma
, sizeof(ddata
->gamma
));
559 ddata
->vcc_reg
= devm_regulator_get(&spi
->dev
, "vcc");
560 if (IS_ERR(ddata
->vcc_reg
)) {
561 dev_err(&spi
->dev
, "failed to get LCD VCC regulator\n");
562 r
= PTR_ERR(ddata
->vcc_reg
);
566 if (gpio_is_valid(ddata
->nreset_gpio
)) {
567 r
= devm_gpio_request_one(&spi
->dev
,
568 ddata
->nreset_gpio
, GPIOF_OUT_INIT_LOW
,
571 dev_err(&spi
->dev
, "couldn't request reset GPIO\n");
576 r
= sysfs_create_group(&spi
->dev
.kobj
, &tpo_td043_attr_group
);
578 dev_err(&spi
->dev
, "failed to create sysfs files\n");
582 ddata
->videomode
= tpo_td043_timings
;
584 dssdev
= &ddata
->dssdev
;
585 dssdev
->dev
= &spi
->dev
;
586 dssdev
->driver
= &tpo_td043_ops
;
587 dssdev
->type
= OMAP_DISPLAY_TYPE_DPI
;
588 dssdev
->owner
= THIS_MODULE
;
589 dssdev
->panel
.timings
= ddata
->videomode
;
591 r
= omapdss_register_display(dssdev
);
593 dev_err(&spi
->dev
, "Failed to register panel\n");
600 sysfs_remove_group(&spi
->dev
.kobj
, &tpo_td043_attr_group
);
604 omap_dss_put_device(ddata
->in
);
608 static int tpo_td043_remove(struct spi_device
*spi
)
610 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
611 struct omap_dss_device
*dssdev
= &ddata
->dssdev
;
612 struct omap_dss_device
*in
= ddata
->in
;
614 dev_dbg(&ddata
->spi
->dev
, "%s\n", __func__
);
616 omapdss_unregister_display(dssdev
);
618 tpo_td043_disable(dssdev
);
619 tpo_td043_disconnect(dssdev
);
621 omap_dss_put_device(in
);
623 sysfs_remove_group(&spi
->dev
.kobj
, &tpo_td043_attr_group
);
628 #ifdef CONFIG_PM_SLEEP
629 static int tpo_td043_spi_suspend(struct device
*dev
)
631 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
633 dev_dbg(dev
, "tpo_td043_spi_suspend, tpo %p\n", ddata
);
635 ddata
->power_on_resume
= ddata
->powered_on
;
636 tpo_td043_power_off(ddata
);
637 ddata
->spi_suspended
= 1;
642 static int tpo_td043_spi_resume(struct device
*dev
)
644 struct panel_drv_data
*ddata
= dev_get_drvdata(dev
);
647 dev_dbg(dev
, "tpo_td043_spi_resume\n");
649 if (ddata
->power_on_resume
) {
650 ret
= tpo_td043_power_on(ddata
);
654 ddata
->spi_suspended
= 0;
660 static SIMPLE_DEV_PM_OPS(tpo_td043_spi_pm
,
661 tpo_td043_spi_suspend
, tpo_td043_spi_resume
);
663 static const struct of_device_id tpo_td043_of_match
[] = {
664 { .compatible
= "omapdss,tpo,td043mtea1", },
668 MODULE_DEVICE_TABLE(of
, tpo_td043_of_match
);
670 static struct spi_driver tpo_td043_spi_driver
= {
672 .name
= "panel-tpo-td043mtea1",
673 .owner
= THIS_MODULE
,
674 .pm
= &tpo_td043_spi_pm
,
675 .of_match_table
= tpo_td043_of_match
,
676 .suppress_bind_attrs
= true,
678 .probe
= tpo_td043_probe
,
679 .remove
= tpo_td043_remove
,
682 module_spi_driver(tpo_td043_spi_driver
);
684 MODULE_ALIAS("spi:tpo,td043mtea1");
685 MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
686 MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
687 MODULE_LICENSE("GPL");