drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HDMI Connector driver
   4  *
   5  * Copyright (C) 2013 Texas Instruments
   6  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
   7  */
   8
   9 #include <linux/slab.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/of.h>
  13 #include <linux/of_gpio.h>
  14
  15 #include <drm/drm_edid.h>
  16
  17 #include <video/omapfb_dss.h>
  18
  19 static const struct omap_video_timings hdmic_default_timings = {
  20         .x_res          = 640,
  21         .y_res          = 480,
  22         .pixelclock     = 25175000,
  23         .hsw            = 96,
  24         .hfp            = 16,
  25         .hbp            = 48,
  26         .vsw            = 2,
  27         .vfp            = 11,
  28         .vbp            = 31,
  29
  30         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  31         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  32
  33         .interlace      = false,
  34 };
  35
  36 struct panel_drv_data {
  37         struct omap_dss_device dssdev;
  38         struct omap_dss_device *in;
  39
  40         struct device *dev;
  41
  42         struct omap_video_timings timings;
  43
  44         int hpd_gpio;
  45 };
  46
  47 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
  48
  49 static int hdmic_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.hdmi->connect(in, dssdev);
  61         if (r)
  62                 return r;
  63
  64         return 0;
  65 }
  66
  67 static void hdmic_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.hdmi->disconnect(in, dssdev);
  78 }
  79
  80 static int hdmic_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.hdmi->set_timings(in, &ddata->timings);
  95
  96         r = in->ops.hdmi->enable(in);
  97         if (r)
  98                 return r;
  99
 100         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 101
 102         return r;
 103 }
 104
 105 static void hdmic_disable(struct omap_dss_device *dssdev)
 106 {
 107         struct panel_drv_data *ddata = to_panel_data(dssdev);
 108         struct omap_dss_device *in = ddata->in;
 109
 110         dev_dbg(ddata->dev, "disable\n");
 111
 112         if (!omapdss_device_is_enabled(dssdev))
 113                 return;
 114
 115         in->ops.hdmi->disable(in);
 116
 117         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 118 }
 119
 120 static void hdmic_set_timings(struct omap_dss_device *dssdev,
 121                 struct omap_video_timings *timings)
 122 {
 123         struct panel_drv_data *ddata = to_panel_data(dssdev);
 124         struct omap_dss_device *in = ddata->in;
 125
 126         ddata->timings = *timings;
 127         dssdev->panel.timings = *timings;
 128
 129         in->ops.hdmi->set_timings(in, timings);
 130 }
 131
 132 static void hdmic_get_timings(struct omap_dss_device *dssdev,
 133                 struct omap_video_timings *timings)
 134 {
 135         struct panel_drv_data *ddata = to_panel_data(dssdev);
 136
 137         *timings = ddata->timings;
 138 }
 139
 140 static int hdmic_check_timings(struct omap_dss_device *dssdev,
 141                 struct omap_video_timings *timings)
 142 {
 143         struct panel_drv_data *ddata = to_panel_data(dssdev);
 144         struct omap_dss_device *in = ddata->in;
 145
 146         return in->ops.hdmi->check_timings(in, timings);
 147 }
 148
 149 static int hdmic_read_edid(struct omap_dss_device *dssdev,
 150                 u8 *edid, int len)
 151 {
 152         struct panel_drv_data *ddata = to_panel_data(dssdev);
 153         struct omap_dss_device *in = ddata->in;
 154
 155         return in->ops.hdmi->read_edid(in, edid, len);
 156 }
 157
 158 static bool hdmic_detect(struct omap_dss_device *dssdev)
 159 {
 160         struct panel_drv_data *ddata = to_panel_data(dssdev);
 161         struct omap_dss_device *in = ddata->in;
 162
 163         if (gpio_is_valid(ddata->hpd_gpio))
 164                 return gpio_get_value_cansleep(ddata->hpd_gpio);
 165         else
 166                 return in->ops.hdmi->detect(in);
 167 }
 168
 169 static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode)
 170 {
 171         struct panel_drv_data *ddata = to_panel_data(dssdev);
 172         struct omap_dss_device *in = ddata->in;
 173
 174         return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
 175 }
 176
 177 static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
 178                 const struct hdmi_avi_infoframe *avi)
 179 {
 180         struct panel_drv_data *ddata = to_panel_data(dssdev);
 181         struct omap_dss_device *in = ddata->in;
 182
 183         return in->ops.hdmi->set_infoframe(in, avi);
 184 }
 185
 186 static struct omap_dss_driver hdmic_driver = {
 187         .connect                = hdmic_connect,
 188         .disconnect             = hdmic_disconnect,
 189
 190         .enable                 = hdmic_enable,
 191         .disable                = hdmic_disable,
 192
 193         .set_timings            = hdmic_set_timings,
 194         .get_timings            = hdmic_get_timings,
 195         .check_timings          = hdmic_check_timings,
 196
 197         .get_resolution         = omapdss_default_get_resolution,
 198
 199         .read_edid              = hdmic_read_edid,
 200         .detect                 = hdmic_detect,
 201         .set_hdmi_mode          = hdmic_set_hdmi_mode,
 202         .set_hdmi_infoframe     = hdmic_set_infoframe,
 203 };
 204
 205 static int hdmic_probe_of(struct platform_device *pdev)
 206 {
 207         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 208         struct device_node *node = pdev->dev.of_node;
 209         struct omap_dss_device *in;
 210         int gpio;
 211
 212         /* HPD GPIO */
 213         gpio = of_get_named_gpio(node, "hpd-gpios", 0);
 214         if (gpio_is_valid(gpio))
 215                 ddata->hpd_gpio = gpio;
 216         else
 217                 ddata->hpd_gpio = -ENODEV;
 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 hdmic_probe(struct platform_device *pdev)
 231 {
 232         struct panel_drv_data *ddata;
 233         struct omap_dss_device *dssdev;
 234         int r;
 235
 236         if (!pdev->dev.of_node)
 237                 return -ENODEV;
 238
 239         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 240         if (!ddata)
 241                 return -ENOMEM;
 242
 243         platform_set_drvdata(pdev, ddata);
 244         ddata->dev = &pdev->dev;
 245
 246         r = hdmic_probe_of(pdev);
 247         if (r)
 248                 return r;
 249
 250         if (gpio_is_valid(ddata->hpd_gpio)) {
 251                 r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
 252                                 GPIOF_DIR_IN, "hdmi_hpd");
 253                 if (r)
 254                         goto err_reg;
 255         }
 256
 257         ddata->timings = hdmic_default_timings;
 258
 259         dssdev = &ddata->dssdev;
 260         dssdev->driver = &hdmic_driver;
 261         dssdev->dev = &pdev->dev;
 262         dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
 263         dssdev->owner = THIS_MODULE;
 264         dssdev->panel.timings = hdmic_default_timings;
 265
 266         r = omapdss_register_display(dssdev);
 267         if (r) {
 268                 dev_err(&pdev->dev, "Failed to register panel\n");
 269                 goto err_reg;
 270         }
 271
 272         return 0;
 273 err_reg:
 274         omap_dss_put_device(ddata->in);
 275         return r;
 276 }
 277
 278 static int __exit hdmic_remove(struct platform_device *pdev)
 279 {
 280         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 281         struct omap_dss_device *dssdev = &ddata->dssdev;
 282         struct omap_dss_device *in = ddata->in;
 283
 284         omapdss_unregister_display(&ddata->dssdev);
 285
 286         hdmic_disable(dssdev);
 287         hdmic_disconnect(dssdev);
 288
 289         omap_dss_put_device(in);
 290
 291         return 0;
 292 }
 293
 294 static const struct of_device_id hdmic_of_match[] = {
 295         { .compatible = "omapdss,hdmi-connector", },
 296         {},
 297 };
 298
 299 MODULE_DEVICE_TABLE(of, hdmic_of_match);
 300
 301 static struct platform_driver hdmi_connector_driver = {
 302         .probe  = hdmic_probe,
 303         .remove = __exit_p(hdmic_remove),
 304         .driver = {
 305                 .name   = "connector-hdmi",
 306                 .of_match_table = hdmic_of_match,
 307                 .suppress_bind_attrs = true,
 308         },
 309 };
 310
 311 module_platform_driver(hdmi_connector_driver);
 312
 313 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 314 MODULE_DESCRIPTION("HDMI Connector driver");
 315 MODULE_LICENSE("GPL");