drivers/video/fbdev/omap2/omapfb/displays/connector-analog-tv.c

   1 /*
   2  * Analog TV Connector driver
   3  *
   4  * Copyright (C) 2013 Texas Instruments
   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 <video/omapfb_dss.h>
  18 #include <video/omap-panel-data.h>
  19
  20 struct panel_drv_data {
  21         struct omap_dss_device dssdev;
  22         struct omap_dss_device *in;
  23
  24         struct device *dev;
  25
  26         struct omap_video_timings timings;
  27
  28         bool invert_polarity;
  29 };
  30
  31 static const struct omap_video_timings tvc_pal_timings = {
  32         .x_res          = 720,
  33         .y_res          = 574,
  34         .pixelclock     = 13500000,
  35         .hsw            = 64,
  36         .hfp            = 12,
  37         .hbp            = 68,
  38         .vsw            = 5,
  39         .vfp            = 5,
  40         .vbp            = 41,
  41
  42         .interlace      = true,
  43 };
  44
  45 static const struct of_device_id tvc_of_match[];
  46
  47 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
  48
  49 static int tvc_connect(struct omap_dss_device *dssdev)
  50 {
  51         struct panel_drv_data *ddata = to_panel_data(dssdev);
  52         struct omap_dss_device *in = ddata->in;
  53         int r;
  54
  55         dev_dbg(ddata->dev, "connect\n");
  56
  57         if (omapdss_device_is_connected(dssdev))
  58                 return 0;
  59
  60         r = in->ops.atv->connect(in, dssdev);
  61         if (r)
  62                 return r;
  63
  64         return 0;
  65 }
  66
  67 static void tvc_disconnect(struct omap_dss_device *dssdev)
  68 {
  69         struct panel_drv_data *ddata = to_panel_data(dssdev);
  70         struct omap_dss_device *in = ddata->in;
  71
  72         dev_dbg(ddata->dev, "disconnect\n");
  73
  74         if (!omapdss_device_is_connected(dssdev))
  75                 return;
  76
  77         in->ops.atv->disconnect(in, dssdev);
  78 }
  79
  80 static int tvc_enable(struct omap_dss_device *dssdev)
  81 {
  82         struct panel_drv_data *ddata = to_panel_data(dssdev);
  83         struct omap_dss_device *in = ddata->in;
  84         int r;
  85
  86         dev_dbg(ddata->dev, "enable\n");
  87
  88         if (!omapdss_device_is_connected(dssdev))
  89                 return -ENODEV;
  90
  91         if (omapdss_device_is_enabled(dssdev))
  92                 return 0;
  93
  94         in->ops.atv->set_timings(in, &ddata->timings);
  95
  96         if (!ddata->dev->of_node) {
  97                 in->ops.atv->set_type(in, OMAP_DSS_VENC_TYPE_COMPOSITE);
  98
  99                 in->ops.atv->invert_vid_out_polarity(in,
 100                         ddata->invert_polarity);
 101         }
 102
 103         r = in->ops.atv->enable(in);
 104         if (r)
 105                 return r;
 106
 107         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 108
 109         return r;
 110 }
 111
 112 static void tvc_disable(struct omap_dss_device *dssdev)
 113 {
 114         struct panel_drv_data *ddata = to_panel_data(dssdev);
 115         struct omap_dss_device *in = ddata->in;
 116
 117         dev_dbg(ddata->dev, "disable\n");
 118
 119         if (!omapdss_device_is_enabled(dssdev))
 120                 return;
 121
 122         in->ops.atv->disable(in);
 123
 124         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 125 }
 126
 127 static void tvc_set_timings(struct omap_dss_device *dssdev,
 128                 struct omap_video_timings *timings)
 129 {
 130         struct panel_drv_data *ddata = to_panel_data(dssdev);
 131         struct omap_dss_device *in = ddata->in;
 132
 133         ddata->timings = *timings;
 134         dssdev->panel.timings = *timings;
 135
 136         in->ops.atv->set_timings(in, timings);
 137 }
 138
 139 static void tvc_get_timings(struct omap_dss_device *dssdev,
 140                 struct omap_video_timings *timings)
 141 {
 142         struct panel_drv_data *ddata = to_panel_data(dssdev);
 143
 144         *timings = ddata->timings;
 145 }
 146
 147 static int tvc_check_timings(struct omap_dss_device *dssdev,
 148                 struct omap_video_timings *timings)
 149 {
 150         struct panel_drv_data *ddata = to_panel_data(dssdev);
 151         struct omap_dss_device *in = ddata->in;
 152
 153         return in->ops.atv->check_timings(in, timings);
 154 }
 155
 156 static u32 tvc_get_wss(struct omap_dss_device *dssdev)
 157 {
 158         struct panel_drv_data *ddata = to_panel_data(dssdev);
 159         struct omap_dss_device *in = ddata->in;
 160
 161         return in->ops.atv->get_wss(in);
 162 }
 163
 164 static int tvc_set_wss(struct omap_dss_device *dssdev, u32 wss)
 165 {
 166         struct panel_drv_data *ddata = to_panel_data(dssdev);
 167         struct omap_dss_device *in = ddata->in;
 168
 169         return in->ops.atv->set_wss(in, wss);
 170 }
 171
 172 static struct omap_dss_driver tvc_driver = {
 173         .connect                = tvc_connect,
 174         .disconnect             = tvc_disconnect,
 175
 176         .enable                 = tvc_enable,
 177         .disable                = tvc_disable,
 178
 179         .set_timings            = tvc_set_timings,
 180         .get_timings            = tvc_get_timings,
 181         .check_timings          = tvc_check_timings,
 182
 183         .get_resolution         = omapdss_default_get_resolution,
 184
 185         .get_wss                = tvc_get_wss,
 186         .set_wss                = tvc_set_wss,
 187 };
 188
 189 static int tvc_probe_pdata(struct platform_device *pdev)
 190 {
 191         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 192         struct connector_atv_platform_data *pdata;
 193         struct omap_dss_device *in, *dssdev;
 194
 195         pdata = dev_get_platdata(&pdev->dev);
 196
 197         in = omap_dss_find_output(pdata->source);
 198         if (in == NULL) {
 199                 dev_err(&pdev->dev, "Failed to find video source\n");
 200                 return -EPROBE_DEFER;
 201         }
 202
 203         ddata->in = in;
 204
 205         ddata->invert_polarity = pdata->invert_polarity;
 206
 207         dssdev = &ddata->dssdev;
 208         dssdev->name = pdata->name;
 209
 210         return 0;
 211 }
 212
 213 static int tvc_probe_of(struct platform_device *pdev)
 214 {
 215         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 216         struct device_node *node = pdev->dev.of_node;
 217         struct omap_dss_device *in;
 218
 219         in = omapdss_of_find_source_for_first_ep(node);
 220         if (IS_ERR(in)) {
 221                 dev_err(&pdev->dev, "failed to find video source\n");
 222                 return PTR_ERR(in);
 223         }
 224
 225         ddata->in = in;
 226
 227         return 0;
 228 }
 229
 230 static int tvc_probe(struct platform_device *pdev)
 231 {
 232         struct panel_drv_data *ddata;
 233         struct omap_dss_device *dssdev;
 234         int r;
 235
 236         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 237         if (!ddata)
 238                 return -ENOMEM;
 239
 240         platform_set_drvdata(pdev, ddata);
 241         ddata->dev = &pdev->dev;
 242
 243         if (dev_get_platdata(&pdev->dev)) {
 244                 r = tvc_probe_pdata(pdev);
 245                 if (r)
 246                         return r;
 247         } else if (pdev->dev.of_node) {
 248                 r = tvc_probe_of(pdev);
 249                 if (r)
 250                         return r;
 251         } else {
 252                 return -ENODEV;
 253         }
 254
 255         ddata->timings = tvc_pal_timings;
 256
 257         dssdev = &ddata->dssdev;
 258         dssdev->driver = &tvc_driver;
 259         dssdev->dev = &pdev->dev;
 260         dssdev->type = OMAP_DISPLAY_TYPE_VENC;
 261         dssdev->owner = THIS_MODULE;
 262         dssdev->panel.timings = tvc_pal_timings;
 263
 264         r = omapdss_register_display(dssdev);
 265         if (r) {
 266                 dev_err(&pdev->dev, "Failed to register panel\n");
 267                 goto err_reg;
 268         }
 269
 270         return 0;
 271 err_reg:
 272         omap_dss_put_device(ddata->in);
 273         return r;
 274 }
 275
 276 static int __exit tvc_remove(struct platform_device *pdev)
 277 {
 278         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 279         struct omap_dss_device *dssdev = &ddata->dssdev;
 280         struct omap_dss_device *in = ddata->in;
 281
 282         omapdss_unregister_display(&ddata->dssdev);
 283
 284         tvc_disable(dssdev);
 285         tvc_disconnect(dssdev);
 286
 287         omap_dss_put_device(in);
 288
 289         return 0;
 290 }
 291
 292 static const struct of_device_id tvc_of_match[] = {
 293         { .compatible = "omapdss,svideo-connector", },
 294         { .compatible = "omapdss,composite-video-connector", },
 295         {},
 296 };
 297
 298 MODULE_DEVICE_TABLE(of, tvc_of_match);
 299
 300 static struct platform_driver tvc_connector_driver = {
 301         .probe  = tvc_probe,
 302         .remove = __exit_p(tvc_remove),
 303         .driver = {
 304                 .name   = "connector-analog-tv",
 305                 .of_match_table = tvc_of_match,
 306                 .suppress_bind_attrs = true,
 307         },
 308 };
 309
 310 module_platform_driver(tvc_connector_driver);
 311
 312 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 313 MODULE_DESCRIPTION("Analog TV Connector driver");
 314 MODULE_LICENSE("GPL");