Release 4.7 drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
/*
* LCD panel driver for Sharp LS037V7DW01
*
* Copyright (C) 2013 Texas Instruments
* Author: 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 version 2 as published by
* the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <video/omapdss.h>
struct panel_drv_data {
struct omap_dss_device dssdev;
struct omap_dss_device *in;
struct regulator *vcc;
int data_lines;
struct omap_video_timings videomode;
struct gpio_desc *resb_gpio; /* low = reset active min 20 us */
struct gpio_desc *ini_gpio; /* high = power on */
struct gpio_desc *mo_gpio; /* low = 480x640, high = 240x320 */
struct gpio_desc *lr_gpio; /* high = conventional horizontal scanning */
struct gpio_desc *ud_gpio; /* high = conventional vertical scanning */
};
static const struct omap_video_timings sharp_ls_timings = {
.x_res = 480,
.y_res = 640,
.pixelclock = 19200000,
.hsw = 2,
.hfp = 1,
.hbp = 28,
.vsw = 1,
.vfp = 1,
.vbp = 1,
.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
};
#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
static int sharp_ls_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;
}
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static void sharp_ls_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);
}
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static int sharp_ls_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);
if (ddata->vcc) {
r = regulator_enable(ddata->vcc);
if (r != 0)
return r;
}
r = in->ops.dpi->enable(in);
if (r) {
regulator_disable(ddata->vcc);
return r;
}
/* wait couple of vsyncs until enabling the LCD */
msleep(50);
if (ddata->resb_gpio)
gpiod_set_value_cansleep(ddata->resb_gpio, 1);
if (ddata->ini_gpio)
gpiod_set_value_cansleep(ddata->ini_gpio, 1);
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
return 0;
}
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static void sharp_ls_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;
if (ddata->ini_gpio)
gpiod_set_value_cansleep(ddata->ini_gpio, 0);
if (ddata->resb_gpio)
gpiod_set_value_cansleep(ddata->resb_gpio, 0);
/* wait at least 5 vsyncs after disabling the LCD */
msleep(100);
in->ops.dpi->disable(in);
if (ddata->vcc)
regulator_disable(ddata->vcc);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}
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static void sharp_ls_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);
}
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static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
*timings = ddata->videomode;
}
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static int sharp_ls_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);
}
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static struct omap_dss_driver sharp_ls_ops = {
.connect = sharp_ls_connect,
.disconnect = sharp_ls_disconnect,
.enable = sharp_ls_enable,
.disable = sharp_ls_disable,
.set_timings = sharp_ls_set_timings,
.get_timings = sharp_ls_get_timings,
.check_timings = sharp_ls_check_timings,
.get_resolution = omapdss_default_get_resolution,
};
static int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
const char *desc, struct gpio_desc **gpiod)
{
struct gpio_desc *gd;
*gpiod = NULL;
gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
if (IS_ERR(gd))
return PTR_ERR(gd);
*gpiod = gd;
return 0;
}
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static int sharp_ls_probe_of(struct platform_device *pdev)
{
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct device_node *node = pdev->dev.of_node;
struct omap_dss_device *in;
int r;
ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
if (IS_ERR(ddata->vcc)) {
dev_err(&pdev->dev, "failed to get regulator\n");
return PTR_ERR(ddata->vcc);
}
/* lcd INI */
r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
if (r)
return r;
/* lcd RESB */
r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
if (r)
return r;
/* lcd MO */
r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
if (r)
return r;
/* lcd LR */
r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
if (r)
return r;
/* lcd UD */
r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
if (r)
return r;
in = omapdss_of_find_source_for_first_ep(node);
if (IS_ERR(in)) {
dev_err(&pdev->dev, "failed to find video source\n");
return PTR_ERR(in);
}
ddata->in = in;
return 0;
}
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static int sharp_ls_probe(struct platform_device *pdev)
{
struct panel_drv_data *ddata;
struct omap_dss_device *dssdev;
int r;
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (ddata == NULL)
return -ENOMEM;
platform_set_drvdata(pdev, ddata);
if (!pdev->dev.of_node)
return -ENODEV;
r = sharp_ls_probe_of(pdev);
if (r)
return r;
ddata->videomode = sharp_ls_timings;
dssdev = &ddata->dssdev;
dssdev->dev = &pdev->dev;
dssdev->driver = &sharp_ls_ops;
dssdev->type = OMAP_DISPLAY_TYPE_DPI;
dssdev->owner = THIS_MODULE;
dssdev->panel.timings = ddata->videomode;
dssdev->phy.dpi.data_lines = ddata->data_lines;
r = omapdss_register_display(dssdev);
if (r) {
dev_err(&pdev->dev, "Failed to register panel\n");
goto err_reg;
}
return 0;
err_reg:
omap_dss_put_device(ddata->in);
return r;
}
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static int __exit sharp_ls_remove(struct platform_device *pdev)
{
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct omap_dss_device *dssdev = &ddata->dssdev;
struct omap_dss_device *in = ddata->in;
omapdss_unregister_display(dssdev);
sharp_ls_disable(dssdev);
sharp_ls_disconnect(dssdev);
omap_dss_put_device(in);
return 0;
}
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static const struct of_device_id sharp_ls_of_match[] = {
{ .compatible = "omapdss,sharp,ls037v7dw01", },
{},
};
MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
static struct platform_driver sharp_ls_driver = {
.probe = sharp_ls_probe,
.remove = __exit_p(sharp_ls_remove),
.driver = {
.name = "panel-sharp-ls037v7dw01",
.of_match_table = sharp_ls_of_match,
.suppress_bind_attrs = true,
},
};
module_platform_driver(sharp_ls_driver);
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
MODULE_LICENSE("GPL");
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