drivers/gpu/drm/omapdrm/displays/connector-analog-tv.c

   1 /*
   2  * Analog TV Connector driver
   3  *
   4  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
   5  * Author: Tomi Valkeinen <tomi.valkeinen@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
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/of.h>
  16
  17 #include "../dss/omapdss.h"
  18
  19 struct panel_drv_data {
  20         struct omap_dss_device dssdev;
  21         struct omap_dss_device *in;
  22
  23         struct device *dev;
  24
  25         struct videomode vm;
  26 };
  27
  28 static const struct videomode tvc_pal_vm = {
  29         .hactive        = 720,
  30         .vactive        = 574,
  31         .pixelclock     = 13500000,
  32         .hsync_len      = 64,
  33         .hfront_porch   = 12,
  34         .hback_porch    = 68,
  35         .vsync_len      = 5,
  36         .vfront_porch   = 5,
  37         .vback_porch    = 41,
  38
  39         .flags          = DISPLAY_FLAGS_INTERLACED | DISPLAY_FLAGS_HSYNC_LOW |
  40                           DISPLAY_FLAGS_VSYNC_LOW,
  41 };
  42
  43 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
  44
  45 static int tvc_connect(struct omap_dss_device *dssdev)
  46 {
  47         struct panel_drv_data *ddata = to_panel_data(dssdev);
  48         struct omap_dss_device *in;
  49         int r;
  50
  51         dev_dbg(ddata->dev, "connect\n");
  52
  53         if (omapdss_device_is_connected(dssdev))
  54                 return 0;
  55
  56         in = omapdss_of_find_source_for_first_ep(ddata->dev->of_node);
  57         if (IS_ERR(in)) {
  58                 dev_err(ddata->dev, "failed to find video source\n");
  59                 return PTR_ERR(in);
  60         }
  61
  62         r = in->ops.atv->connect(in, dssdev);
  63         if (r) {
  64                 omap_dss_put_device(in);
  65                 return r;
  66         }
  67
  68         ddata->in = in;
  69         return 0;
  70 }
  71
  72 static void tvc_disconnect(struct omap_dss_device *dssdev)
  73 {
  74         struct panel_drv_data *ddata = to_panel_data(dssdev);
  75         struct omap_dss_device *in = ddata->in;
  76
  77         dev_dbg(ddata->dev, "disconnect\n");
  78
  79         if (!omapdss_device_is_connected(dssdev))
  80                 return;
  81
  82         in->ops.atv->disconnect(in, dssdev);
  83
  84         omap_dss_put_device(in);
  85         ddata->in = NULL;
  86 }
  87
  88 static int tvc_enable(struct omap_dss_device *dssdev)
  89 {
  90         struct panel_drv_data *ddata = to_panel_data(dssdev);
  91         struct omap_dss_device *in = ddata->in;
  92         int r;
  93
  94         dev_dbg(ddata->dev, "enable\n");
  95
  96         if (!omapdss_device_is_connected(dssdev))
  97                 return -ENODEV;
  98
  99         if (omapdss_device_is_enabled(dssdev))
 100                 return 0;
 101
 102         in->ops.atv->set_timings(in, &ddata->vm);
 103
 104         r = in->ops.atv->enable(in);
 105         if (r)
 106                 return r;
 107
 108         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 109
 110         return r;
 111 }
 112
 113 static void tvc_disable(struct omap_dss_device *dssdev)
 114 {
 115         struct panel_drv_data *ddata = to_panel_data(dssdev);
 116         struct omap_dss_device *in = ddata->in;
 117
 118         dev_dbg(ddata->dev, "disable\n");
 119
 120         if (!omapdss_device_is_enabled(dssdev))
 121                 return;
 122
 123         in->ops.atv->disable(in);
 124
 125         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 126 }
 127
 128 static void tvc_set_timings(struct omap_dss_device *dssdev,
 129                             struct videomode *vm)
 130 {
 131         struct panel_drv_data *ddata = to_panel_data(dssdev);
 132         struct omap_dss_device *in = ddata->in;
 133
 134         ddata->vm = *vm;
 135         dssdev->panel.vm = *vm;
 136
 137         in->ops.atv->set_timings(in, vm);
 138 }
 139
 140 static void tvc_get_timings(struct omap_dss_device *dssdev,
 141                             struct videomode *vm)
 142 {
 143         struct panel_drv_data *ddata = to_panel_data(dssdev);
 144
 145         *vm = ddata->vm;
 146 }
 147
 148 static int tvc_check_timings(struct omap_dss_device *dssdev,
 149                              struct videomode *vm)
 150 {
 151         struct panel_drv_data *ddata = to_panel_data(dssdev);
 152         struct omap_dss_device *in = ddata->in;
 153
 154         return in->ops.atv->check_timings(in, vm);
 155 }
 156
 157 static u32 tvc_get_wss(struct omap_dss_device *dssdev)
 158 {
 159         struct panel_drv_data *ddata = to_panel_data(dssdev);
 160         struct omap_dss_device *in = ddata->in;
 161
 162         return in->ops.atv->get_wss(in);
 163 }
 164
 165 static int tvc_set_wss(struct omap_dss_device *dssdev, u32 wss)
 166 {
 167         struct panel_drv_data *ddata = to_panel_data(dssdev);
 168         struct omap_dss_device *in = ddata->in;
 169
 170         return in->ops.atv->set_wss(in, wss);
 171 }
 172
 173 static struct omap_dss_driver tvc_driver = {
 174         .connect                = tvc_connect,
 175         .disconnect             = tvc_disconnect,
 176
 177         .enable                 = tvc_enable,
 178         .disable                = tvc_disable,
 179
 180         .set_timings            = tvc_set_timings,
 181         .get_timings            = tvc_get_timings,
 182         .check_timings          = tvc_check_timings,
 183
 184         .get_wss                = tvc_get_wss,
 185         .set_wss                = tvc_set_wss,
 186 };
 187
 188 static int tvc_probe(struct platform_device *pdev)
 189 {
 190         struct panel_drv_data *ddata;
 191         struct omap_dss_device *dssdev;
 192         int r;
 193
 194         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 195         if (!ddata)
 196                 return -ENOMEM;
 197
 198         platform_set_drvdata(pdev, ddata);
 199         ddata->dev = &pdev->dev;
 200
 201         ddata->vm = tvc_pal_vm;
 202
 203         dssdev = &ddata->dssdev;
 204         dssdev->driver = &tvc_driver;
 205         dssdev->dev = &pdev->dev;
 206         dssdev->type = OMAP_DISPLAY_TYPE_VENC;
 207         dssdev->owner = THIS_MODULE;
 208         dssdev->panel.vm = tvc_pal_vm;
 209
 210         r = omapdss_register_display(dssdev);
 211         if (r) {
 212                 dev_err(&pdev->dev, "Failed to register panel\n");
 213                 return r;
 214         }
 215
 216         return 0;
 217 }
 218
 219 static int __exit tvc_remove(struct platform_device *pdev)
 220 {
 221         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 222         struct omap_dss_device *dssdev = &ddata->dssdev;
 223
 224         omapdss_unregister_display(&ddata->dssdev);
 225
 226         tvc_disable(dssdev);
 227         tvc_disconnect(dssdev);
 228
 229         return 0;
 230 }
 231
 232 static const struct of_device_id tvc_of_match[] = {
 233         { .compatible = "omapdss,svideo-connector", },
 234         { .compatible = "omapdss,composite-video-connector", },
 235         {},
 236 };
 237
 238 MODULE_DEVICE_TABLE(of, tvc_of_match);
 239
 240 static struct platform_driver tvc_connector_driver = {
 241         .probe  = tvc_probe,
 242         .remove = __exit_p(tvc_remove),
 243         .driver = {
 244                 .name   = "connector-analog-tv",
 245                 .of_match_table = tvc_of_match,
 246                 .suppress_bind_attrs = true,
 247         },
 248 };
 249
 250 module_platform_driver(tvc_connector_driver);
 251
 252 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 253 MODULE_DESCRIPTION("Analog TV Connector driver");
 254 MODULE_LICENSE("GPL");