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
  22         struct device *dev;
  23 };
  24
  25 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
  26
  27 static int tvc_connect(struct omap_dss_device *src,
  28                        struct omap_dss_device *dst)
  29 {
  30         return 0;
  31 }
  32
  33 static void tvc_disconnect(struct omap_dss_device *src,
  34                            struct omap_dss_device *dst)
  35 {
  36 }
  37
  38 static int tvc_enable(struct omap_dss_device *dssdev)
  39 {
  40         struct panel_drv_data *ddata = to_panel_data(dssdev);
  41         struct omap_dss_device *src = dssdev->src;
  42         int r;
  43
  44         dev_dbg(ddata->dev, "enable\n");
  45
  46         if (!omapdss_device_is_connected(dssdev))
  47                 return -ENODEV;
  48
  49         if (omapdss_device_is_enabled(dssdev))
  50                 return 0;
  51
  52         r = src->ops->enable(src);
  53         if (r)
  54                 return r;
  55
  56         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
  57
  58         return r;
  59 }
  60
  61 static void tvc_disable(struct omap_dss_device *dssdev)
  62 {
  63         struct panel_drv_data *ddata = to_panel_data(dssdev);
  64         struct omap_dss_device *src = dssdev->src;
  65
  66         dev_dbg(ddata->dev, "disable\n");
  67
  68         if (!omapdss_device_is_enabled(dssdev))
  69                 return;
  70
  71         src->ops->disable(src);
  72
  73         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
  74 }
  75
  76 static const struct omap_dss_device_ops tvc_ops = {
  77         .connect                = tvc_connect,
  78         .disconnect             = tvc_disconnect,
  79
  80         .enable                 = tvc_enable,
  81         .disable                = tvc_disable,
  82 };
  83
  84 static int tvc_probe(struct platform_device *pdev)
  85 {
  86         struct panel_drv_data *ddata;
  87         struct omap_dss_device *dssdev;
  88
  89         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
  90         if (!ddata)
  91                 return -ENOMEM;
  92
  93         platform_set_drvdata(pdev, ddata);
  94         ddata->dev = &pdev->dev;
  95
  96         dssdev = &ddata->dssdev;
  97         dssdev->ops = &tvc_ops;
  98         dssdev->dev = &pdev->dev;
  99         dssdev->type = OMAP_DISPLAY_TYPE_VENC;
 100         dssdev->owner = THIS_MODULE;
 101         dssdev->of_ports = BIT(0);
 102
 103         omapdss_display_init(dssdev);
 104         omapdss_device_register(dssdev);
 105
 106         return 0;
 107 }
 108
 109 static int __exit tvc_remove(struct platform_device *pdev)
 110 {
 111         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 112         struct omap_dss_device *dssdev = &ddata->dssdev;
 113
 114         omapdss_device_unregister(&ddata->dssdev);
 115
 116         tvc_disable(dssdev);
 117
 118         return 0;
 119 }
 120
 121 static const struct of_device_id tvc_of_match[] = {
 122         { .compatible = "omapdss,svideo-connector", },
 123         { .compatible = "omapdss,composite-video-connector", },
 124         {},
 125 };
 126
 127 MODULE_DEVICE_TABLE(of, tvc_of_match);
 128
 129 static struct platform_driver tvc_connector_driver = {
 130         .probe  = tvc_probe,
 131         .remove = __exit_p(tvc_remove),
 132         .driver = {
 133                 .name   = "connector-analog-tv",
 134                 .of_match_table = tvc_of_match,
 135                 .suppress_bind_attrs = true,
 136         },
 137 };
 138
 139 module_platform_driver(tvc_connector_driver);
 140
 141 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 142 MODULE_DESCRIPTION("Analog TV Connector driver");
 143 MODULE_LICENSE("GPL");