// SPDX-License-Identifier: GPL-2.0-or-later
/*
* TPO TD043MTEA1 Panel driver
*
* Author: Gražvydas Ignotas <[email protected]>
* Converted to new DSS device model: Tomi Valkeinen <[email protected]>
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <video/omapfb_dss.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;
struct gpio_desc *reset_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,
.pixelclock = 36000000,
.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_RISING_EDGE,
};
#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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%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 i;
for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++)
len += sysfs_emit_at(buf, len, "%u ", ddata->gamma[i]);
if (len)
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 const 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);
gpiod_set_value_cansleep(ddata->reset_gpio, 0);
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);
gpiod_set_value_cansleep(ddata->reset_gpio, 1);
/* 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;
if (omapdss_device_is_connected(dssdev))
return 0;
return in->ops.dpi->connect(in, dssdev);
}
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;
if (ddata->data_lines)
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(struct spi_device *spi)
{
struct panel_drv_data *ddata;
struct omap_dss_device *dssdev;
int r;
dev_dbg(&spi->dev, "%s\n", __func__);
if (!spi->dev.of_node)
return -ENODEV;
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;
ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
r = PTR_ERR_OR_ZERO(ddata->in);
if (r) {
dev_err(&spi->dev, "failed to find video source: %d\n", r);
return r;
}
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)) {
r = dev_err_probe(&spi->dev, PTR_ERR(ddata->vcc_reg),
"failed to get LCD VCC regulator\n");
goto err_regulator;
}
ddata->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH);
r = PTR_ERR_OR_ZERO(ddata->reset_gpio);
if (r) {
dev_err(&spi->dev, "couldn't request reset GPIO\n");
goto err_gpio_req;
}
gpiod_set_consumer_name(ddata->reset_gpio, "lcd reset");
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 void 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);
}
#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 const struct of_device_id tpo_td043_of_match[] = {
{ .compatible = "omapdss,tpo,td043mtea1", },
{},
};
MODULE_DEVICE_TABLE(of, tpo_td043_of_match);
static struct spi_driver tpo_td043_spi_driver = {
.driver = {
.name = "panel-tpo-td043mtea1",
.pm = &tpo_td043_spi_pm,
.of_match_table = tpo_td043_of_match,
.suppress_bind_attrs = true,
},
.probe = tpo_td043_probe,
.remove = tpo_td043_remove,
};
module_spi_driver(tpo_td043_spi_driver);
MODULE_ALIAS("spi:tpo,td043mtea1");
MODULE_AUTHOR("Gražvydas Ignotas <[email protected]>");
MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
MODULE_LICENSE("GPL");
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