diff options
Diffstat (limited to 'drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c')
| -rw-r--r-- | drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c new file mode 100644 index 00000000..ba38b3ad --- /dev/null +++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c @@ -0,0 +1,233 @@ +/* + * LCD panel driver for Sharp LS037V7DW01 + * + * Copyright (C) 2008 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@nokia.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. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/backlight.h> +#include <linux/fb.h> +#include <linux/err.h> +#include <linux/slab.h> + +#include <video/omapdss.h> + +struct sharp_data { + struct backlight_device *bl; +}; + +static struct omap_video_timings sharp_ls_timings = { + .x_res = 480, + .y_res = 640, + + .pixel_clock = 19200, + + .hsw = 2, + .hfp = 1, + .hbp = 28, + + .vsw = 1, + .vfp = 1, + .vbp = 1, +}; + +static int sharp_ls_bl_update_status(struct backlight_device *bl) +{ + struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev); + int level; + + if (!dssdev->set_backlight) + return -EINVAL; + + if (bl->props.fb_blank == FB_BLANK_UNBLANK && + bl->props.power == FB_BLANK_UNBLANK) + level = bl->props.brightness; + else + level = 0; + + return dssdev->set_backlight(dssdev, level); +} + +static int sharp_ls_bl_get_brightness(struct backlight_device *bl) +{ + if (bl->props.fb_blank == FB_BLANK_UNBLANK && + bl->props.power == FB_BLANK_UNBLANK) + return bl->props.brightness; + + return 0; +} + +static const struct backlight_ops sharp_ls_bl_ops = { + .get_brightness = sharp_ls_bl_get_brightness, + .update_status = sharp_ls_bl_update_status, +}; + + + +static int sharp_ls_panel_probe(struct omap_dss_device *dssdev) +{ + struct backlight_properties props; + struct backlight_device *bl; + struct sharp_data *sd; + int r; + + dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | + OMAP_DSS_LCD_IHS; + dssdev->panel.acb = 0x28; + dssdev->panel.timings = sharp_ls_timings; + + sd = kzalloc(sizeof(*sd), GFP_KERNEL); + if (!sd) + return -ENOMEM; + + dev_set_drvdata(&dssdev->dev, sd); + + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = dssdev->max_backlight_level; + props.type = BACKLIGHT_RAW; + + bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev, + &sharp_ls_bl_ops, &props); + if (IS_ERR(bl)) { + r = PTR_ERR(bl); + kfree(sd); + return r; + } + sd->bl = bl; + + bl->props.fb_blank = FB_BLANK_UNBLANK; + bl->props.power = FB_BLANK_UNBLANK; + bl->props.brightness = dssdev->max_backlight_level; + r = sharp_ls_bl_update_status(bl); + if (r < 0) + dev_err(&dssdev->dev, "failed to set lcd brightness\n"); + + return 0; +} + +static void __exit sharp_ls_panel_remove(struct omap_dss_device *dssdev) +{ + struct sharp_data *sd = dev_get_drvdata(&dssdev->dev); + struct backlight_device *bl = sd->bl; + + bl->props.power = FB_BLANK_POWERDOWN; + sharp_ls_bl_update_status(bl); + backlight_device_unregister(bl); + + kfree(sd); +} + +static int sharp_ls_power_on(struct omap_dss_device *dssdev) +{ + int r = 0; + + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) + return 0; + + r = omapdss_dpi_display_enable(dssdev); + if (r) + goto err0; + + /* wait couple of vsyncs until enabling the LCD */ + msleep(50); + + if (dssdev->platform_enable) { + r = dssdev->platform_enable(dssdev); + if (r) + goto err1; + } + + return 0; +err1: + omapdss_dpi_display_disable(dssdev); +err0: + return r; +} + +static void sharp_ls_power_off(struct omap_dss_device *dssdev) +{ + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + return; + + if (dssdev->platform_disable) + dssdev->platform_disable(dssdev); + + /* wait at least 5 vsyncs after disabling the LCD */ + + msleep(100); + + omapdss_dpi_display_disable(dssdev); +} + +static int sharp_ls_panel_enable(struct omap_dss_device *dssdev) +{ + int r; + r = sharp_ls_power_on(dssdev); + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + return r; +} + +static void sharp_ls_panel_disable(struct omap_dss_device *dssdev) +{ + sharp_ls_power_off(dssdev); + dssdev->state = OMAP_DSS_DISPLAY_DISABLED; +} + +static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev) +{ + sharp_ls_power_off(dssdev); + dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; + return 0; +} + +static int sharp_ls_panel_resume(struct omap_dss_device *dssdev) +{ + int r; + r = sharp_ls_power_on(dssdev); + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + return r; +} + +static struct omap_dss_driver sharp_ls_driver = { + .probe = sharp_ls_panel_probe, + .remove = __exit_p(sharp_ls_panel_remove), + + .enable = sharp_ls_panel_enable, + .disable = sharp_ls_panel_disable, + .suspend = sharp_ls_panel_suspend, + .resume = sharp_ls_panel_resume, + + .driver = { + .name = "sharp_ls_panel", + .owner = THIS_MODULE, + }, +}; + +static int __init sharp_ls_panel_drv_init(void) +{ + return omap_dss_register_driver(&sharp_ls_driver); +} + +static void __exit sharp_ls_panel_drv_exit(void) +{ + omap_dss_unregister_driver(&sharp_ls_driver); +} + +module_init(sharp_ls_panel_drv_init); +module_exit(sharp_ls_panel_drv_exit); +MODULE_LICENSE("GPL"); |