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Commit 2e1def0c authored by Tomi Valkeinen's avatar Tomi Valkeinen
Browse files

OMAPDSS: Add TPO TD043MTEA1 panel driver 



Add TPO TD043MTEA1 panel driver which uses the new DSS device model
and DSS ops.

Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: default avatarGrazvydas Ignotas <notasas@gmail.com>
parent 922ae890

drivers/video/omap2/displays-new/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -55,4 +55,11 @@ config DISPLAY_PANEL_SHARP_LS037V7DW01 
        depends on BACKLIGHT_CLASS_DEVICE

        help

          LCD Panel used in TI's SDP3430 and EVM boards



config DISPLAY_PANEL_TPO_TD043MTEA1

        tristate "TPO TD043MTEA1 LCD Panel"

        depends on SPI

        help

          LCD Panel used in OMAP3 Pandora



endmenu

drivers/video/omap2/displays-new/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,3 +8,4 @@ obj-$(CONFIG_DISPLAY_PANEL_DSI_CM) += panel-dsi-cm.o 
obj-$(CONFIG_DISPLAY_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o

obj-$(CONFIG_DISPLAY_PANEL_LGPHILIPS_LB035Q02) += panel-lgphilips-lb035q02.o

obj-$(CONFIG_DISPLAY_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o

obj-$(CONFIG_DISPLAY_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o

drivers/video/omap2/displays-new/panel-tpo-td043mtea1.c

0 → 100644
+646 −0
Original line number Diff line number Diff line 
/*

 * TPO TD043MTEA1 Panel driver

 *

 * Author: Gražvydas Ignotas <notasas@gmail.com>

 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */



#include <linux/module.h>

#include <linux/delay.h>

#include <linux/spi/spi.h>

#include <linux/regulator/consumer.h>

#include <linux/gpio.h>

#include <linux/err.h>

#include <linux/slab.h>



#include <video/omapdss.h>

#include <video/omap-panel-data.h>



#define TPO_R02_MODE(x)		((x) & 7)

#define TPO_R02_MODE_800x480	7

#define TPO_R02_NCLK_RISING	BIT(3)

#define TPO_R02_HSYNC_HIGH	BIT(4)

#define TPO_R02_VSYNC_HIGH	BIT(5)



#define TPO_R03_NSTANDBY	BIT(0)

#define TPO_R03_EN_CP_CLK	BIT(1)

#define TPO_R03_EN_VGL_PUMP	BIT(2)

#define TPO_R03_EN_PWM		BIT(3)

#define TPO_R03_DRIVING_CAP_100	BIT(4)

#define TPO_R03_EN_PRE_CHARGE	BIT(6)

#define TPO_R03_SOFTWARE_CTL	BIT(7)



#define TPO_R04_NFLIP_H		BIT(0)

#define TPO_R04_NFLIP_V		BIT(1)

#define TPO_R04_CP_CLK_FREQ_1H	BIT(2)

#define TPO_R04_VGL_FREQ_1H	BIT(4)



#define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \

			TPO_R03_EN_VGL_PUMP |  TPO_R03_EN_PWM | \

			TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \

			TPO_R03_SOFTWARE_CTL)



#define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \

			TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)



static const u16 tpo_td043_def_gamma[12] = {

	105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023

};



struct panel_drv_data {

	struct omap_dss_device	dssdev;

	struct omap_dss_device *in;



	struct omap_video_timings videomode;



	int data_lines;



	struct spi_device *spi;

	struct regulator *vcc_reg;

	int nreset_gpio;

	u16 gamma[12];

	u32 mode;

	u32 hmirror:1;

	u32 vmirror:1;

	u32 powered_on:1;

	u32 spi_suspended:1;

	u32 power_on_resume:1;

};



static const struct omap_video_timings tpo_td043_timings = {

	.x_res		= 800,

	.y_res		= 480,



	.pixel_clock	= 36000,



	.hsw		= 1,

	.hfp		= 68,

	.hbp		= 214,



	.vsw		= 1,

	.vfp		= 39,

	.vbp		= 34,



	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,

	.hsync_level	= OMAPDSS_SIG_ACTIVE_LOW,

	.data_pclk_edge	= OMAPDSS_DRIVE_SIG_FALLING_EDGE,

	.de_level	= OMAPDSS_SIG_ACTIVE_HIGH,

	.sync_pclk_edge	= OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,

};



#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)



static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)

{

	struct spi_message	m;

	struct spi_transfer	xfer;

	u16			w;

	int			r;



	spi_message_init(&m);



	memset(&xfer, 0, sizeof(xfer));



	w = ((u16)addr << 10) | (1 << 8) | data;

	xfer.tx_buf = &w;

	xfer.bits_per_word = 16;

	xfer.len = 2;

	spi_message_add_tail(&xfer, &m);



	r = spi_sync(spi, &m);

	if (r < 0)

		dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);

	return r;

}



static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])

{

	u8 i, val;



	/* gamma bits [9:8] */

	for (val = i = 0; i < 4; i++)

		val |= (gamma[i] & 0x300) >> ((i + 1) * 2);

	tpo_td043_write(spi, 0x11, val);



	for (val = i = 0; i < 4; i++)

		val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);

	tpo_td043_write(spi, 0x12, val);



	for (val = i = 0; i < 4; i++)

		val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);

	tpo_td043_write(spi, 0x13, val);



	/* gamma bits [7:0] */

	for (val = i = 0; i < 12; i++)

		tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);

}



static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)

{

	u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V |

		TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;

	if (h)

		reg4 &= ~TPO_R04_NFLIP_H;

	if (v)

		reg4 &= ~TPO_R04_NFLIP_V;



	return tpo_td043_write(spi, 4, reg4);

}



static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);



	ddata->hmirror = enable;

	return tpo_td043_write_mirror(ddata->spi, ddata->hmirror,

			ddata->vmirror);

}



static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);



	return ddata->hmirror;

}



static ssize_t tpo_td043_vmirror_show(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);



	return snprintf(buf, PAGE_SIZE, "%d\n", ddata->vmirror);

}



static ssize_t tpo_td043_vmirror_store(struct device *dev,

	struct device_attribute *attr, const char *buf, size_t count)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	int val;

	int ret;



	ret = kstrtoint(buf, 0, &val);

	if (ret < 0)

		return ret;



	val = !!val;



	ret = tpo_td043_write_mirror(ddata->spi, ddata->hmirror, val);

	if (ret < 0)

		return ret;



	ddata->vmirror = val;



	return count;

}



static ssize_t tpo_td043_mode_show(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);



	return snprintf(buf, PAGE_SIZE, "%d\n", ddata->mode);

}



static ssize_t tpo_td043_mode_store(struct device *dev,

	struct device_attribute *attr, const char *buf, size_t count)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	long val;

	int ret;



	ret = kstrtol(buf, 0, &val);

	if (ret != 0 || val & ~7)

		return -EINVAL;



	ddata->mode = val;



	val |= TPO_R02_NCLK_RISING;

	tpo_td043_write(ddata->spi, 2, val);



	return count;

}



static ssize_t tpo_td043_gamma_show(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	ssize_t len = 0;

	int ret;

	int i;



	for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++) {

		ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",

				ddata->gamma[i]);

		if (ret < 0)

			return ret;

		len += ret;

	}

	buf[len - 1] = '\n';



	return len;

}



static ssize_t tpo_td043_gamma_store(struct device *dev,

	struct device_attribute *attr, const char *buf, size_t count)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	unsigned int g[12];

	int ret;

	int i;



	ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",

			&g[0], &g[1], &g[2], &g[3], &g[4], &g[5],

			&g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);



	if (ret != 12)

		return -EINVAL;



	for (i = 0; i < 12; i++)

		ddata->gamma[i] = g[i];



	tpo_td043_write_gamma(ddata->spi, ddata->gamma);



	return count;

}



static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,

		tpo_td043_vmirror_show, tpo_td043_vmirror_store);

static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,

		tpo_td043_mode_show, tpo_td043_mode_store);

static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,

		tpo_td043_gamma_show, tpo_td043_gamma_store);



static struct attribute *tpo_td043_attrs[] = {

	&dev_attr_vmirror.attr,

	&dev_attr_mode.attr,

	&dev_attr_gamma.attr,

	NULL,

};



static struct attribute_group tpo_td043_attr_group = {

	.attrs = tpo_td043_attrs,

};



static int tpo_td043_power_on(struct panel_drv_data *ddata)

{

	int r;



	if (ddata->powered_on)

		return 0;



	r = regulator_enable(ddata->vcc_reg);

	if (r != 0)

		return r;



	/* wait for panel to stabilize */

	msleep(160);



	if (gpio_is_valid(ddata->nreset_gpio))

		gpio_set_value(ddata->nreset_gpio, 1);



	tpo_td043_write(ddata->spi, 2,

			TPO_R02_MODE(ddata->mode) | TPO_R02_NCLK_RISING);

	tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_NORMAL);

	tpo_td043_write(ddata->spi, 0x20, 0xf0);

	tpo_td043_write(ddata->spi, 0x21, 0xf0);

	tpo_td043_write_mirror(ddata->spi, ddata->hmirror,

			ddata->vmirror);

	tpo_td043_write_gamma(ddata->spi, ddata->gamma);



	ddata->powered_on = 1;

	return 0;

}



static void tpo_td043_power_off(struct panel_drv_data *ddata)

{

	if (!ddata->powered_on)

		return;



	tpo_td043_write(ddata->spi, 3,

			TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);



	if (gpio_is_valid(ddata->nreset_gpio))

		gpio_set_value(ddata->nreset_gpio, 0);



	/* wait for at least 2 vsyncs before cutting off power */

	msleep(50);



	tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_STANDBY);



	regulator_disable(ddata->vcc_reg);



	ddata->powered_on = 0;

}



static int tpo_td043_connect(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;

	int r;



	if (omapdss_device_is_connected(dssdev))

		return 0;



	r = in->ops.dpi->connect(in, dssdev);

	if (r)

		return r;



	return 0;

}



static void tpo_td043_disconnect(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



	if (!omapdss_device_is_connected(dssdev))

		return;



	in->ops.dpi->disconnect(in, dssdev);

}



static int tpo_td043_enable(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;

	int r;



	if (!omapdss_device_is_connected(dssdev))

		return -ENODEV;



	if (omapdss_device_is_enabled(dssdev))

		return 0;



	in->ops.dpi->set_data_lines(in, ddata->data_lines);

	in->ops.dpi->set_timings(in, &ddata->videomode);



	r = in->ops.dpi->enable(in);

	if (r)

		return r;



	/*

	 * If we are resuming from system suspend, SPI clocks might not be

	 * enabled yet, so we'll program the LCD from SPI PM resume callback.

	 */

	if (!ddata->spi_suspended) {

		r = tpo_td043_power_on(ddata);

		if (r) {

			in->ops.dpi->disable(in);

			return r;

		}

	}



	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;



	return 0;

}



static void tpo_td043_disable(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



	if (!omapdss_device_is_enabled(dssdev))

		return;



	in->ops.dpi->disable(in);



	if (!ddata->spi_suspended)

		tpo_td043_power_off(ddata);



	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;

}



static void tpo_td043_set_timings(struct omap_dss_device *dssdev,

		struct omap_video_timings *timings)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



	ddata->videomode = *timings;

	dssdev->panel.timings = *timings;



	in->ops.dpi->set_timings(in, timings);

}



static void tpo_td043_get_timings(struct omap_dss_device *dssdev,

		struct omap_video_timings *timings)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);



	*timings = ddata->videomode;

}



static int tpo_td043_check_timings(struct omap_dss_device *dssdev,

		struct omap_video_timings *timings)

{

	struct panel_drv_data *ddata = to_panel_data(dssdev);

	struct omap_dss_device *in = ddata->in;



	return in->ops.dpi->check_timings(in, timings);

}



static struct omap_dss_driver tpo_td043_ops = {

	.connect	= tpo_td043_connect,

	.disconnect	= tpo_td043_disconnect,



	.enable		= tpo_td043_enable,

	.disable	= tpo_td043_disable,



	.set_timings	= tpo_td043_set_timings,

	.get_timings	= tpo_td043_get_timings,

	.check_timings	= tpo_td043_check_timings,



	.set_mirror	= tpo_td043_set_hmirror,

	.get_mirror	= tpo_td043_get_hmirror,



	.get_resolution	= omapdss_default_get_resolution,

};





static int tpo_td043_probe_pdata(struct spi_device *spi)

{

	const struct panel_tpo_td043mtea1_platform_data *pdata;

	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);

	struct omap_dss_device *dssdev, *in;



	pdata = dev_get_platdata(&spi->dev);



	ddata->nreset_gpio = pdata->nreset_gpio;



	in = omap_dss_find_output(pdata->source);

	if (in == NULL) {

		dev_err(&spi->dev, "failed to find video source '%s'\n",

				pdata->source);

		return -EPROBE_DEFER;

	}

	ddata->in = in;



	ddata->data_lines = pdata->data_lines;



	dssdev = &ddata->dssdev;

	dssdev->name = pdata->name;



	return 0;

}



static int tpo_td043_probe(struct spi_device *spi)

{

	struct panel_drv_data *ddata;

	struct omap_dss_device *dssdev;

	int r;



	dev_dbg(&spi->dev, "%s\n", __func__);



	spi->bits_per_word = 16;

	spi->mode = SPI_MODE_0;



	r = spi_setup(spi);

	if (r < 0) {

		dev_err(&spi->dev, "spi_setup failed: %d\n", r);

		return r;

	}



	ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);

	if (ddata == NULL)

		return -ENOMEM;



	dev_set_drvdata(&spi->dev, ddata);



	ddata->spi = spi;



	if (dev_get_platdata(&spi->dev)) {

		r = tpo_td043_probe_pdata(spi);

		if (r)

			return r;

	} else {

		return -ENODEV;

	}



	ddata->mode = TPO_R02_MODE_800x480;

	memcpy(ddata->gamma, tpo_td043_def_gamma, sizeof(ddata->gamma));



	ddata->vcc_reg = devm_regulator_get(&spi->dev, "vcc");

	if (IS_ERR(ddata->vcc_reg)) {

		dev_err(&spi->dev, "failed to get LCD VCC regulator\n");

		r = PTR_ERR(ddata->vcc_reg);

		goto err_regulator;

	}



	if (gpio_is_valid(ddata->nreset_gpio)) {

		r = devm_gpio_request_one(&spi->dev,

				ddata->nreset_gpio, GPIOF_OUT_INIT_LOW,

				"lcd reset");

		if (r < 0) {

			dev_err(&spi->dev, "couldn't request reset GPIO\n");

			goto err_gpio_req;

		}

	}



	r = sysfs_create_group(&spi->dev.kobj, &tpo_td043_attr_group);

	if (r) {

		dev_err(&spi->dev, "failed to create sysfs files\n");

		goto err_sysfs;

	}



	ddata->videomode = tpo_td043_timings;



	dssdev = &ddata->dssdev;

	dssdev->dev = &spi->dev;

	dssdev->driver = &tpo_td043_ops;

	dssdev->type = OMAP_DISPLAY_TYPE_DPI;

	dssdev->owner = THIS_MODULE;

	dssdev->panel.timings = ddata->videomode;



	r = omapdss_register_display(dssdev);

	if (r) {

		dev_err(&spi->dev, "Failed to register panel\n");

		goto err_reg;

	}



	return 0;



err_reg:

	sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);

err_sysfs:

err_gpio_req:

err_regulator:

	omap_dss_put_device(ddata->in);

	return r;

}



static int tpo_td043_remove(struct spi_device *spi)

{

	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);

	struct omap_dss_device *dssdev = &ddata->dssdev;

	struct omap_dss_device *in = ddata->in;



	dev_dbg(&ddata->spi->dev, "%s\n", __func__);



	omapdss_unregister_display(dssdev);



	tpo_td043_disable(dssdev);

	tpo_td043_disconnect(dssdev);



	omap_dss_put_device(in);



	sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);



	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int tpo_td043_spi_suspend(struct device *dev)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);



	dev_dbg(dev, "tpo_td043_spi_suspend, tpo %p\n", ddata);



	ddata->power_on_resume = ddata->powered_on;

	tpo_td043_power_off(ddata);

	ddata->spi_suspended = 1;



	return 0;

}



static int tpo_td043_spi_resume(struct device *dev)

{

	struct panel_drv_data *ddata = dev_get_drvdata(dev);

	int ret;



	dev_dbg(dev, "tpo_td043_spi_resume\n");



	if (ddata->power_on_resume) {

		ret = tpo_td043_power_on(ddata);

		if (ret)

			return ret;

	}

	ddata->spi_suspended = 0;



	return 0;

}

#endif



static SIMPLE_DEV_PM_OPS(tpo_td043_spi_pm,

	tpo_td043_spi_suspend, tpo_td043_spi_resume);



static struct spi_driver tpo_td043_spi_driver = {

	.driver = {

		.name	= "panel-tpo-td043mtea1",

		.owner	= THIS_MODULE,

		.pm	= &tpo_td043_spi_pm,

	},

	.probe	= tpo_td043_probe,

	.remove	= tpo_td043_remove,

};



module_spi_driver(tpo_td043_spi_driver);



MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");

MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");

MODULE_LICENSE("GPL");

include/video/omap-panel-data.h

+16 −0
Original line number Diff line number Diff line
@@ -322,4 +322,20 @@ struct panel_sharp_ls037v7dw01_platform_data { 
	int ud_gpio;

};



/**

 * panel-tpo-td043mtea1 platform data

 * @name: name for this display entity

 * @source: name of the display entity used as a video source

 * @data_lines: number of DPI datalines

 * @nreset_gpio: reset signal

 */

struct panel_tpo_td043mtea1_platform_data {

	const char *name;

	const char *source;



	int data_lines;



	int nreset_gpio;

};



#endif /* __OMAP_PANEL_DATA_H */