drivers/video/omap2/displays/panel-generic.c

   1 /*
   2  * Generic panel support
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.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
  23 #include <plat/display.h>
  24
  25 static struct omap_video_timings generic_panel_timings = {
  26         /* 640 x 480 @ 60 Hz  Reduced blanking VESA CVT 0.31M3-R */
  27         .x_res          = 640,
  28         .y_res          = 480,
  29         .pixel_clock    = 23500,
  30         .hfp            = 48,
  31         .hsw            = 32,
  32         .hbp            = 80,
  33         .vfp            = 3,
  34         .vsw            = 4,
  35         .vbp            = 7,
  36 };
  37
  38 static int generic_panel_power_on(struct omap_dss_device *dssdev)
  39 {
  40         int r;
  41
  42         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
  43                 return 0;
  44
  45         r = omapdss_dpi_display_enable(dssdev);
  46         if (r)
  47                 goto err0;
  48
  49         if (dssdev->platform_enable) {
  50                 r = dssdev->platform_enable(dssdev);
  51                 if (r)
  52                         goto err1;
  53         }
  54
  55         return 0;
  56 err1:
  57         omapdss_dpi_display_disable(dssdev);
  58 err0:
  59         return r;
  60 }
  61
  62 static void generic_panel_power_off(struct omap_dss_device *dssdev)
  63 {
  64         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
  65                 return;
  66
  67         if (dssdev->platform_disable)
  68                 dssdev->platform_disable(dssdev);
  69
  70         omapdss_dpi_display_disable(dssdev);
  71 }
  72
  73 static int generic_panel_probe(struct omap_dss_device *dssdev)
  74 {
  75         dssdev->panel.config = OMAP_DSS_LCD_TFT;
  76         dssdev->panel.timings = generic_panel_timings;
  77
  78         return 0;
  79 }
  80
  81 static void generic_panel_remove(struct omap_dss_device *dssdev)
  82 {
  83 }
  84
  85 static int generic_panel_enable(struct omap_dss_device *dssdev)
  86 {
  87         int r = 0;
  88
  89         r = generic_panel_power_on(dssdev);
  90         if (r)
  91                 return r;
  92
  93         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
  94
  95         return 0;
  96 }
  97
  98 static void generic_panel_disable(struct omap_dss_device *dssdev)
  99 {
 100         generic_panel_power_off(dssdev);
 101
 102         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 103 }
 104
 105 static int generic_panel_suspend(struct omap_dss_device *dssdev)
 106 {
 107         generic_panel_power_off(dssdev);
 108         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 109         return 0;
 110 }
 111
 112 static int generic_panel_resume(struct omap_dss_device *dssdev)
 113 {
 114         int r = 0;
 115
 116         r = generic_panel_power_on(dssdev);
 117         if (r)
 118                 return r;
 119
 120         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 121
 122         return 0;
 123 }
 124
 125 static void generic_panel_set_timings(struct omap_dss_device *dssdev,
 126                 struct omap_video_timings *timings)
 127 {
 128         dpi_set_timings(dssdev, timings);
 129 }
 130
 131 static void generic_panel_get_timings(struct omap_dss_device *dssdev,
 132                 struct omap_video_timings *timings)
 133 {
 134         *timings = dssdev->panel.timings;
 135 }
 136
 137 static int generic_panel_check_timings(struct omap_dss_device *dssdev,
 138                 struct omap_video_timings *timings)
 139 {
 140         return dpi_check_timings(dssdev, timings);
 141 }
 142
 143 static struct omap_dss_driver generic_driver = {
 144         .probe          = generic_panel_probe,
 145         .remove         = generic_panel_remove,
 146
 147         .enable         = generic_panel_enable,
 148         .disable        = generic_panel_disable,
 149         .suspend        = generic_panel_suspend,
 150         .resume         = generic_panel_resume,
 151
 152         .set_timings    = generic_panel_set_timings,
 153         .get_timings    = generic_panel_get_timings,
 154         .check_timings  = generic_panel_check_timings,
 155
 156         .driver         = {
 157                 .name   = "generic_panel",
 158                 .owner  = THIS_MODULE,
 159         },
 160 };
 161
 162 static int __init generic_panel_drv_init(void)
 163 {
 164         return omap_dss_register_driver(&generic_driver);
 165 }
 166
 167 static void __exit generic_panel_drv_exit(void)
 168 {
 169         omap_dss_unregister_driver(&generic_driver);
 170 }
 171
 172 module_init(generic_panel_drv_init);
 173 module_exit(generic_panel_drv_exit);
 174 MODULE_LICENSE("GPL");