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         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
  47                 return 0;
  48
  49         r = omapdss_dpi_display_enable(dssdev);
  50         if (r)
  51                 goto err0;
  52
  53         /* wait couple of vsyncs until enabling the LCD */
  54         msleep(50);
  55
  56         if (dssdev->platform_enable) {
  57                 r = dssdev->platform_enable(dssdev);
  58                 if (r)
  59                         goto err1;
  60         }
  61
  62         return 0;
  63 err1:
  64         omapdss_dpi_display_disable(dssdev);
  65 err0:
  66         return r;
  67 }
  68
  69 static void sharp_lq_panel_power_off(struct omap_dss_device *dssdev)
  70 {
  71         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
  72                 return;
  73
  74         if (dssdev->platform_disable)
  75                 dssdev->platform_disable(dssdev);
  76
  77         /* wait at least 5 vsyncs after disabling the LCD */
  78         msleep(100);
  79
  80         omapdss_dpi_display_disable(dssdev);
  81 }
  82
  83 static int sharp_lq_panel_probe(struct omap_dss_device *dssdev)
  84 {
  85
  86         dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
  87                 OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IEO;
  88         dssdev->panel.acb = 0x0;
  89         dssdev->panel.timings = sharp_lq_timings;
  90
  91         return 0;
  92 }
  93
  94 static void sharp_lq_panel_remove(struct omap_dss_device *dssdev)
  95 {
  96 }
  97
  98 static int sharp_lq_panel_enable(struct omap_dss_device *dssdev)
  99 {
 100         int r = 0;
 101
 102         r = sharp_lq_panel_power_on(dssdev);
 103         if (r)
 104                 return r;
 105
 106         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 107
 108         return 0;
 109 }
 110
 111 static void sharp_lq_panel_disable(struct omap_dss_device *dssdev)
 112 {
 113         sharp_lq_panel_power_off(dssdev);
 114
 115         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 116 }
 117
 118 static int sharp_lq_panel_suspend(struct omap_dss_device *dssdev)
 119 {
 120         sharp_lq_panel_power_off(dssdev);
 121         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 122         return 0;
 123 }
 124
 125 static int sharp_lq_panel_resume(struct omap_dss_device *dssdev)
 126 {
 127         int r = 0;
 128
 129         r = sharp_lq_panel_power_on(dssdev);
 130         if (r)
 131                 return r;
 132
 133         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 134
 135         return 0;
 136 }
 137
 138 static struct omap_dss_driver sharp_lq_driver = {
 139         .probe          = sharp_lq_panel_probe,
 140         .remove         = sharp_lq_panel_remove,
 141
 142         .enable         = sharp_lq_panel_enable,
 143         .disable        = sharp_lq_panel_disable,
 144         .suspend        = sharp_lq_panel_suspend,
 145         .resume         = sharp_lq_panel_resume,
 146
 147         .driver         = {
 148                 .name   = "sharp_lq_panel",
 149                 .owner  = THIS_MODULE,
 150         },
 151 };
 152
 153 static int __init sharp_lq_panel_drv_init(void)
 154 {
 155         return omap_dss_register_driver(&sharp_lq_driver);
 156 }
 157
 158 static void __exit sharp_lq_panel_drv_exit(void)
 159 {
 160         omap_dss_unregister_driver(&sharp_lq_driver);
 161 }
 162
 163 module_init(sharp_lq_panel_drv_init);
 164 module_exit(sharp_lq_panel_drv_exit);
 165 MODULE_LICENSE("GPL");