drivers/video/omap2/displays/panel-sharp-lq043t1dg01.c

   1 /*
   2  * LCD panel driver for Sharp LQ043T1DG01
   3  *
   4  * Copyright (C) 2009 Texas Instruments Inc
   5  * Author: Vaibhav Hiremath <hvaibhav@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/delay.h>
  22 #include <linux/device.h>
  23 #include <linux/err.h>
  24
  25 #include <plat/display.h>
  26
  27 static struct omap_video_timings sharp_lq_timings = {
  28         .x_res = 480,
  29         .y_res = 272,
  30
  31         .pixel_clock    = 9000,
  32
  33         .hsw            = 42,
  34         .hfp            = 3,
  35         .hbp            = 2,
  36
  37         .vsw            = 11,
  38         .vfp            = 3,
  39         .vbp            = 2,
  40 };
  41
  42 static int sharp_lq_panel_power_on(struct omap_dss_device *dssdev)
  43 {
  44         int r;
  45
  46         r = omapdss_dpi_display_enable(dssdev);
  47         if (r)
  48                 goto err0;
  49
  50         /* wait couple of vsyncs until enabling the LCD */
  51         msleep(50);
  52
  53         if (dssdev->platform_enable) {
  54                 r = dssdev->platform_enable(dssdev);
  55                 if (r)
  56                         goto err1;
  57         }
  58
  59         return 0;
  60 err1:
  61         omapdss_dpi_display_disable(dssdev);
  62 err0:
  63         return r;
  64 }
  65
  66 static void sharp_lq_panel_power_off(struct omap_dss_device *dssdev)
  67 {
  68         if (dssdev->platform_disable)
  69                 dssdev->platform_disable(dssdev);
  70
  71         /* wait at least 5 vsyncs after disabling the LCD */
  72         msleep(100);
  73
  74         omapdss_dpi_display_disable(dssdev);
  75 }
  76
  77 static int sharp_lq_panel_probe(struct omap_dss_device *dssdev)
  78 {
  79
  80         dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
  81                 OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IEO;
  82         dssdev->panel.acb = 0x0;
  83         dssdev->panel.timings = sharp_lq_timings;
  84
  85         return 0;
  86 }
  87
  88 static void sharp_lq_panel_remove(struct omap_dss_device *dssdev)
  89 {
  90 }
  91
  92 static int sharp_lq_panel_enable(struct omap_dss_device *dssdev)
  93 {
  94         int r = 0;
  95
  96         r = sharp_lq_panel_power_on(dssdev);
  97         if (r)
  98                 return r;
  99
 100         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 101
 102         return 0;
 103 }
 104
 105 static void sharp_lq_panel_disable(struct omap_dss_device *dssdev)
 106 {
 107         sharp_lq_panel_power_off(dssdev);
 108
 109         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 110 }
 111
 112 static int sharp_lq_panel_suspend(struct omap_dss_device *dssdev)
 113 {
 114         sharp_lq_panel_power_off(dssdev);
 115         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 116         return 0;
 117 }
 118
 119 static int sharp_lq_panel_resume(struct omap_dss_device *dssdev)
 120 {
 121         int r = 0;
 122
 123         r = sharp_lq_panel_power_on(dssdev);
 124         if (r)
 125                 return r;
 126
 127         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 128
 129         return 0;
 130 }
 131
 132 static struct omap_dss_driver sharp_lq_driver = {
 133         .probe          = sharp_lq_panel_probe,
 134         .remove         = sharp_lq_panel_remove,
 135
 136         .enable         = sharp_lq_panel_enable,
 137         .disable        = sharp_lq_panel_disable,
 138         .suspend        = sharp_lq_panel_suspend,
 139         .resume         = sharp_lq_panel_resume,
 140
 141         .driver         = {
 142                 .name   = "sharp_lq_panel",
 143                 .owner  = THIS_MODULE,
 144         },
 145 };
 146
 147 static int __init sharp_lq_panel_drv_init(void)
 148 {
 149         return omap_dss_register_driver(&sharp_lq_driver);
 150 }
 151
 152 static void __exit sharp_lq_panel_drv_exit(void)
 153 {
 154         omap_dss_unregister_driver(&sharp_lq_driver);
 155 }
 156
 157 module_init(sharp_lq_panel_drv_init);
 158 module_exit(sharp_lq_panel_drv_exit);
 159 MODULE_LICENSE("GPL");