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 static const struct of_device_id tvc_of_match[];
  44
  45 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
  46
  47 static int tvc_connect(struct omap_dss_device *dssdev)
  48 {
  49         struct panel_drv_data *ddata = to_panel_data(dssdev);
  50         struct omap_dss_device *in = ddata->in;
  51         int r;
  52
  53         dev_dbg(ddata->dev, "connect\n");
  54
  55         if (omapdss_device_is_connected(dssdev))
  56                 return 0;
  57
  58         r = in->ops.atv->connect(in, dssdev);
  59         if (r)
  60                 return r;
  61
  62         return 0;
  63 }
  64
  65 static void tvc_disconnect(struct omap_dss_device *dssdev)
  66 {
  67         struct panel_drv_data *ddata = to_panel_data(dssdev);
  68         struct omap_dss_device *in = ddata->in;
  69
  70         dev_dbg(ddata->dev, "disconnect\n");
  71
  72         if (!omapdss_device_is_connected(dssdev))
  73                 return;
  74
  75         in->ops.atv->disconnect(in, dssdev);
  76 }
  77
  78 static int tvc_enable(struct omap_dss_device *dssdev)
  79 {
  80         struct panel_drv_data *ddata = to_panel_data(dssdev);
  81         struct omap_dss_device *in = ddata->in;
  82         int r;
  83
  84         dev_dbg(ddata->dev, "enable\n");
  85
  86         if (!omapdss_device_is_connected(dssdev))
  87                 return -ENODEV;
  88
  89         if (omapdss_device_is_enabled(dssdev))
  90                 return 0;
  91
  92         in->ops.atv->set_timings(in, &ddata->vm);
  93
  94         r = in->ops.atv->enable(in);
  95         if (r)
  96                 return r;
  97
  98         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
  99
 100         return r;
 101 }
 102
 103 static void tvc_disable(struct omap_dss_device *dssdev)
 104 {
 105         struct panel_drv_data *ddata = to_panel_data(dssdev);
 106         struct omap_dss_device *in = ddata->in;
 107
 108         dev_dbg(ddata->dev, "disable\n");
 109
 110         if (!omapdss_device_is_enabled(dssdev))
 111                 return;
 112
 113         in->ops.atv->disable(in);
 114
 115         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 116 }
 117
 118 static void tvc_set_timings(struct omap_dss_device *dssdev,
 119                             struct videomode *vm)
 120 {
 121         struct panel_drv_data *ddata = to_panel_data(dssdev);
 122         struct omap_dss_device *in = ddata->in;
 123
 124         ddata->vm = *vm;
 125         dssdev->panel.vm = *vm;
 126
 127         in->ops.atv->set_timings(in, vm);
 128 }
 129
 130 static void tvc_get_timings(struct omap_dss_device *dssdev,
 131                             struct videomode *vm)
 132 {
 133         struct panel_drv_data *ddata = to_panel_data(dssdev);
 134
 135         *vm = ddata->vm;
 136 }
 137
 138 static int tvc_check_timings(struct omap_dss_device *dssdev,
 139                              struct videomode *vm)
 140 {
 141         struct panel_drv_data *ddata = to_panel_data(dssdev);
 142         struct omap_dss_device *in = ddata->in;
 143
 144         return in->ops.atv->check_timings(in, vm);
 145 }
 146
 147 static u32 tvc_get_wss(struct omap_dss_device *dssdev)
 148 {
 149         struct panel_drv_data *ddata = to_panel_data(dssdev);
 150         struct omap_dss_device *in = ddata->in;
 151
 152         return in->ops.atv->get_wss(in);
 153 }
 154
 155 static int tvc_set_wss(struct omap_dss_device *dssdev, u32 wss)
 156 {
 157         struct panel_drv_data *ddata = to_panel_data(dssdev);
 158         struct omap_dss_device *in = ddata->in;
 159
 160         return in->ops.atv->set_wss(in, wss);
 161 }
 162
 163 static struct omap_dss_driver tvc_driver = {
 164         .connect                = tvc_connect,
 165         .disconnect             = tvc_disconnect,
 166
 167         .enable                 = tvc_enable,
 168         .disable                = tvc_disable,
 169
 170         .set_timings            = tvc_set_timings,
 171         .get_timings            = tvc_get_timings,
 172         .check_timings          = tvc_check_timings,
 173
 174         .get_wss                = tvc_get_wss,
 175         .set_wss                = tvc_set_wss,
 176 };
 177
 178 static int tvc_probe_of(struct platform_device *pdev)
 179 {
 180         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 181         struct device_node *node = pdev->dev.of_node;
 182         struct omap_dss_device *in;
 183
 184         in = omapdss_of_find_source_for_first_ep(node);
 185         if (IS_ERR(in)) {
 186                 dev_err(&pdev->dev, "failed to find video source\n");
 187                 return PTR_ERR(in);
 188         }
 189
 190         ddata->in = in;
 191
 192         return 0;
 193 }
 194
 195 static int tvc_probe(struct platform_device *pdev)
 196 {
 197         struct panel_drv_data *ddata;
 198         struct omap_dss_device *dssdev;
 199         int r;
 200
 201         if (!pdev->dev.of_node)
 202                 return -ENODEV;
 203
 204         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 205         if (!ddata)
 206                 return -ENOMEM;
 207
 208         platform_set_drvdata(pdev, ddata);
 209         ddata->dev = &pdev->dev;
 210
 211         r = tvc_probe_of(pdev);
 212         if (r)
 213                 return r;
 214
 215         ddata->vm = tvc_pal_vm;
 216
 217         dssdev = &ddata->dssdev;
 218         dssdev->driver = &tvc_driver;
 219         dssdev->dev = &pdev->dev;
 220         dssdev->type = OMAP_DISPLAY_TYPE_VENC;
 221         dssdev->owner = THIS_MODULE;
 222         dssdev->panel.vm = tvc_pal_vm;
 223
 224         r = omapdss_register_display(dssdev);
 225         if (r) {
 226                 dev_err(&pdev->dev, "Failed to register panel\n");
 227                 goto err_reg;
 228         }
 229
 230         return 0;
 231 err_reg:
 232         omap_dss_put_device(ddata->in);
 233         return r;
 234 }
 235
 236 static int __exit tvc_remove(struct platform_device *pdev)
 237 {
 238         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 239         struct omap_dss_device *dssdev = &ddata->dssdev;
 240         struct omap_dss_device *in = ddata->in;
 241
 242         omapdss_unregister_display(&ddata->dssdev);
 243
 244         tvc_disable(dssdev);
 245         tvc_disconnect(dssdev);
 246
 247         omap_dss_put_device(in);
 248
 249         return 0;
 250 }
 251
 252 static const struct of_device_id tvc_of_match[] = {
 253         { .compatible = "omapdss,svideo-connector", },
 254         { .compatible = "omapdss,composite-video-connector", },
 255         {},
 256 };
 257
 258 MODULE_DEVICE_TABLE(of, tvc_of_match);
 259
 260 static struct platform_driver tvc_connector_driver = {
 261         .probe  = tvc_probe,
 262         .remove = __exit_p(tvc_remove),
 263         .driver = {
 264                 .name   = "connector-analog-tv",
 265                 .of_match_table = tvc_of_match,
 266                 .suppress_bind_attrs = true,
 267         },
 268 };
 269
 270 module_platform_driver(tvc_connector_driver);
 271
 272 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 273 MODULE_DESCRIPTION("Analog TV Connector driver");
 274 MODULE_LICENSE("GPL");