1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * TPO TD043MTEA1 Panel driver
5 * Author: Gražvydas Ignotas <notasas@gmail.com>
6 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
9 #include <linux/module.h>
10 #include <linux/delay.h>
11 #include <linux/spi/spi.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/err.h>
15 #include <linux/slab.h>
17 #include <video/omapfb_dss.h>
19 #define TPO_R02_MODE(x) ((x) & 7)
20 #define TPO_R02_MODE_800x480 7
21 #define TPO_R02_NCLK_RISING BIT(3)
22 #define TPO_R02_HSYNC_HIGH BIT(4)
23 #define TPO_R02_VSYNC_HIGH BIT(5)
25 #define TPO_R03_NSTANDBY BIT(0)
26 #define TPO_R03_EN_CP_CLK BIT(1)
27 #define TPO_R03_EN_VGL_PUMP BIT(2)
28 #define TPO_R03_EN_PWM BIT(3)
29 #define TPO_R03_DRIVING_CAP_100 BIT(4)
30 #define TPO_R03_EN_PRE_CHARGE BIT(6)
31 #define TPO_R03_SOFTWARE_CTL BIT(7)
33 #define TPO_R04_NFLIP_H BIT(0)
34 #define TPO_R04_NFLIP_V BIT(1)
35 #define TPO_R04_CP_CLK_FREQ_1H BIT(2)
36 #define TPO_R04_VGL_FREQ_1H BIT(4)
38 #define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
39 TPO_R03_EN_VGL_PUMP | TPO_R03_EN_PWM | \
40 TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
43 #define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
44 TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)
46 static const u16 tpo_td043_def_gamma[12] = {
47 105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023
50 struct panel_drv_data {
51 struct omap_dss_device dssdev;
52 struct omap_dss_device *in;
54 struct omap_video_timings videomode;
58 struct spi_device *spi;
59 struct regulator *vcc_reg;
60 struct gpio_desc *reset_gpio;
67 u32 power_on_resume:1;
70 static const struct omap_video_timings tpo_td043_timings = {
74 .pixelclock = 36000000,
84 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
85 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
86 .data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
87 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
88 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
91 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
93 static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)
96 struct spi_transfer xfer;
100 spi_message_init(&m);
102 memset(&xfer, 0, sizeof(xfer));
104 w = ((u16)addr << 10) | (1 << 8) | data;
106 xfer.bits_per_word = 16;
108 spi_message_add_tail(&xfer, &m);
110 r = spi_sync(spi, &m);
112 dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);
116 static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])
120 /* gamma bits [9:8] */
121 for (val = i = 0; i < 4; i++)
122 val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
123 tpo_td043_write(spi, 0x11, val);
125 for (val = i = 0; i < 4; i++)
126 val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);
127 tpo_td043_write(spi, 0x12, val);
129 for (val = i = 0; i < 4; i++)
130 val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);
131 tpo_td043_write(spi, 0x13, val);
133 /* gamma bits [7:0] */
134 for (val = i = 0; i < 12; i++)
135 tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);
138 static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
140 u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V |
141 TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
143 reg4 &= ~TPO_R04_NFLIP_H;
145 reg4 &= ~TPO_R04_NFLIP_V;
147 return tpo_td043_write(spi, 4, reg4);
150 static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
152 struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
154 ddata->hmirror = enable;
155 return tpo_td043_write_mirror(ddata->spi, ddata->hmirror,
159 static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
161 struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
163 return ddata->hmirror;
166 static ssize_t tpo_td043_vmirror_show(struct device *dev,
167 struct device_attribute *attr, char *buf)
169 struct panel_drv_data *ddata = dev_get_drvdata(dev);
171 return sysfs_emit(buf, "%d\n", ddata->vmirror);
174 static ssize_t tpo_td043_vmirror_store(struct device *dev,
175 struct device_attribute *attr, const char *buf, size_t count)
177 struct panel_drv_data *ddata = dev_get_drvdata(dev);
181 ret = kstrtoint(buf, 0, &val);
187 ret = tpo_td043_write_mirror(ddata->spi, ddata->hmirror, val);
191 ddata->vmirror = val;
196 static ssize_t tpo_td043_mode_show(struct device *dev,
197 struct device_attribute *attr, char *buf)
199 struct panel_drv_data *ddata = dev_get_drvdata(dev);
201 return sysfs_emit(buf, "%d\n", ddata->mode);
204 static ssize_t tpo_td043_mode_store(struct device *dev,
205 struct device_attribute *attr, const char *buf, size_t count)
207 struct panel_drv_data *ddata = dev_get_drvdata(dev);
211 ret = kstrtol(buf, 0, &val);
212 if (ret != 0 || val & ~7)
217 val |= TPO_R02_NCLK_RISING;
218 tpo_td043_write(ddata->spi, 2, val);
223 static ssize_t tpo_td043_gamma_show(struct device *dev,
224 struct device_attribute *attr, char *buf)
226 struct panel_drv_data *ddata = dev_get_drvdata(dev);
230 for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++)
231 len += sysfs_emit_at(buf, len, "%u ", ddata->gamma[i]);
238 static ssize_t tpo_td043_gamma_store(struct device *dev,
239 struct device_attribute *attr, const char *buf, size_t count)
241 struct panel_drv_data *ddata = dev_get_drvdata(dev);
246 ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
247 &g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
248 &g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);
253 for (i = 0; i < 12; i++)
254 ddata->gamma[i] = g[i];
256 tpo_td043_write_gamma(ddata->spi, ddata->gamma);
261 static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,
262 tpo_td043_vmirror_show, tpo_td043_vmirror_store);
263 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
264 tpo_td043_mode_show, tpo_td043_mode_store);
265 static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,
266 tpo_td043_gamma_show, tpo_td043_gamma_store);
268 static struct attribute *tpo_td043_attrs[] = {
269 &dev_attr_vmirror.attr,
271 &dev_attr_gamma.attr,
275 static const struct attribute_group tpo_td043_attr_group = {
276 .attrs = tpo_td043_attrs,
279 static int tpo_td043_power_on(struct panel_drv_data *ddata)
283 if (ddata->powered_on)
286 r = regulator_enable(ddata->vcc_reg);
290 /* wait for panel to stabilize */
293 gpiod_set_value_cansleep(ddata->reset_gpio, 0);
295 tpo_td043_write(ddata->spi, 2,
296 TPO_R02_MODE(ddata->mode) | TPO_R02_NCLK_RISING);
297 tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_NORMAL);
298 tpo_td043_write(ddata->spi, 0x20, 0xf0);
299 tpo_td043_write(ddata->spi, 0x21, 0xf0);
300 tpo_td043_write_mirror(ddata->spi, ddata->hmirror,
302 tpo_td043_write_gamma(ddata->spi, ddata->gamma);
304 ddata->powered_on = 1;
308 static void tpo_td043_power_off(struct panel_drv_data *ddata)
310 if (!ddata->powered_on)
313 tpo_td043_write(ddata->spi, 3,
314 TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
316 gpiod_set_value_cansleep(ddata->reset_gpio, 1);
318 /* wait for at least 2 vsyncs before cutting off power */
321 tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_STANDBY);
323 regulator_disable(ddata->vcc_reg);
325 ddata->powered_on = 0;
328 static int tpo_td043_connect(struct omap_dss_device *dssdev)
330 struct panel_drv_data *ddata = to_panel_data(dssdev);
331 struct omap_dss_device *in = ddata->in;
333 if (omapdss_device_is_connected(dssdev))
336 return in->ops.dpi->connect(in, dssdev);
339 static void tpo_td043_disconnect(struct omap_dss_device *dssdev)
341 struct panel_drv_data *ddata = to_panel_data(dssdev);
342 struct omap_dss_device *in = ddata->in;
344 if (!omapdss_device_is_connected(dssdev))
347 in->ops.dpi->disconnect(in, dssdev);
350 static int tpo_td043_enable(struct omap_dss_device *dssdev)
352 struct panel_drv_data *ddata = to_panel_data(dssdev);
353 struct omap_dss_device *in = ddata->in;
356 if (!omapdss_device_is_connected(dssdev))
359 if (omapdss_device_is_enabled(dssdev))
362 if (ddata->data_lines)
363 in->ops.dpi->set_data_lines(in, ddata->data_lines);
364 in->ops.dpi->set_timings(in, &ddata->videomode);
366 r = in->ops.dpi->enable(in);
371 * If we are resuming from system suspend, SPI clocks might not be
372 * enabled yet, so we'll program the LCD from SPI PM resume callback.
374 if (!ddata->spi_suspended) {
375 r = tpo_td043_power_on(ddata);
377 in->ops.dpi->disable(in);
382 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
387 static void tpo_td043_disable(struct omap_dss_device *dssdev)
389 struct panel_drv_data *ddata = to_panel_data(dssdev);
390 struct omap_dss_device *in = ddata->in;
392 if (!omapdss_device_is_enabled(dssdev))
395 in->ops.dpi->disable(in);
397 if (!ddata->spi_suspended)
398 tpo_td043_power_off(ddata);
400 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
403 static void tpo_td043_set_timings(struct omap_dss_device *dssdev,
404 struct omap_video_timings *timings)
406 struct panel_drv_data *ddata = to_panel_data(dssdev);
407 struct omap_dss_device *in = ddata->in;
409 ddata->videomode = *timings;
410 dssdev->panel.timings = *timings;
412 in->ops.dpi->set_timings(in, timings);
415 static void tpo_td043_get_timings(struct omap_dss_device *dssdev,
416 struct omap_video_timings *timings)
418 struct panel_drv_data *ddata = to_panel_data(dssdev);
420 *timings = ddata->videomode;
423 static int tpo_td043_check_timings(struct omap_dss_device *dssdev,
424 struct omap_video_timings *timings)
426 struct panel_drv_data *ddata = to_panel_data(dssdev);
427 struct omap_dss_device *in = ddata->in;
429 return in->ops.dpi->check_timings(in, timings);
432 static struct omap_dss_driver tpo_td043_ops = {
433 .connect = tpo_td043_connect,
434 .disconnect = tpo_td043_disconnect,
436 .enable = tpo_td043_enable,
437 .disable = tpo_td043_disable,
439 .set_timings = tpo_td043_set_timings,
440 .get_timings = tpo_td043_get_timings,
441 .check_timings = tpo_td043_check_timings,
443 .set_mirror = tpo_td043_set_hmirror,
444 .get_mirror = tpo_td043_get_hmirror,
446 .get_resolution = omapdss_default_get_resolution,
449 static int tpo_td043_probe(struct spi_device *spi)
451 struct panel_drv_data *ddata;
452 struct omap_dss_device *dssdev;
455 dev_dbg(&spi->dev, "%s\n", __func__);
457 if (!spi->dev.of_node)
460 spi->bits_per_word = 16;
461 spi->mode = SPI_MODE_0;
465 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
469 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
473 dev_set_drvdata(&spi->dev, ddata);
477 ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
478 r = PTR_ERR_OR_ZERO(ddata->in);
480 dev_err(&spi->dev, "failed to find video source: %d\n", r);
484 ddata->mode = TPO_R02_MODE_800x480;
485 memcpy(ddata->gamma, tpo_td043_def_gamma, sizeof(ddata->gamma));
487 ddata->vcc_reg = devm_regulator_get(&spi->dev, "vcc");
488 if (IS_ERR(ddata->vcc_reg)) {
489 r = dev_err_probe(&spi->dev, PTR_ERR(ddata->vcc_reg),
490 "failed to get LCD VCC regulator\n");
494 ddata->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH);
495 r = PTR_ERR_OR_ZERO(ddata->reset_gpio);
497 dev_err(&spi->dev, "couldn't request reset GPIO\n");
501 gpiod_set_consumer_name(ddata->reset_gpio, "lcd reset");
503 r = sysfs_create_group(&spi->dev.kobj, &tpo_td043_attr_group);
505 dev_err(&spi->dev, "failed to create sysfs files\n");
509 ddata->videomode = tpo_td043_timings;
511 dssdev = &ddata->dssdev;
512 dssdev->dev = &spi->dev;
513 dssdev->driver = &tpo_td043_ops;
514 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
515 dssdev->owner = THIS_MODULE;
516 dssdev->panel.timings = ddata->videomode;
518 r = omapdss_register_display(dssdev);
520 dev_err(&spi->dev, "Failed to register panel\n");
527 sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);
531 omap_dss_put_device(ddata->in);
535 static void tpo_td043_remove(struct spi_device *spi)
537 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
538 struct omap_dss_device *dssdev = &ddata->dssdev;
539 struct omap_dss_device *in = ddata->in;
541 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
543 omapdss_unregister_display(dssdev);
545 tpo_td043_disable(dssdev);
546 tpo_td043_disconnect(dssdev);
548 omap_dss_put_device(in);
550 sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);
553 #ifdef CONFIG_PM_SLEEP
554 static int tpo_td043_spi_suspend(struct device *dev)
556 struct panel_drv_data *ddata = dev_get_drvdata(dev);
558 dev_dbg(dev, "tpo_td043_spi_suspend, tpo %p\n", ddata);
560 ddata->power_on_resume = ddata->powered_on;
561 tpo_td043_power_off(ddata);
562 ddata->spi_suspended = 1;
567 static int tpo_td043_spi_resume(struct device *dev)
569 struct panel_drv_data *ddata = dev_get_drvdata(dev);
572 dev_dbg(dev, "tpo_td043_spi_resume\n");
574 if (ddata->power_on_resume) {
575 ret = tpo_td043_power_on(ddata);
579 ddata->spi_suspended = 0;
585 static SIMPLE_DEV_PM_OPS(tpo_td043_spi_pm,
586 tpo_td043_spi_suspend, tpo_td043_spi_resume);
588 static const struct of_device_id tpo_td043_of_match[] = {
589 { .compatible = "omapdss,tpo,td043mtea1", },
593 MODULE_DEVICE_TABLE(of, tpo_td043_of_match);
595 static struct spi_driver tpo_td043_spi_driver = {
597 .name = "panel-tpo-td043mtea1",
598 .pm = &tpo_td043_spi_pm,
599 .of_match_table = tpo_td043_of_match,
600 .suppress_bind_attrs = true,
602 .probe = tpo_td043_probe,
603 .remove = tpo_td043_remove,
606 module_spi_driver(tpo_td043_spi_driver);
608 MODULE_ALIAS("spi:tpo,td043mtea1");
609 MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
610 MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
611 MODULE_LICENSE("GPL");