drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c

   1 /*
   2  * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
   3  *
   4  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_crtc.h>
  16 #include <drm/drm_crtc_helper.h>
  17
  18 #include <video/display_timing.h>
  19 #include <video/of_display_timing.h>
  20 #include <video/videomode.h>
  21
  22 #include "rcar_du_drv.h"
  23 #include "rcar_du_encoder.h"
  24 #include "rcar_du_kms.h"
  25 #include "rcar_du_lvdscon.h"
  26
  27 struct rcar_du_lvds_connector {
  28         struct rcar_du_connector connector;
  29
  30         struct rcar_du_panel_data panel;
  31 };
  32
  33 #define to_rcar_lvds_connector(c) \
  34         container_of(c, struct rcar_du_lvds_connector, connector.connector)
  35
  36 static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
  37 {
  38         struct rcar_du_lvds_connector *lvdscon =
  39                 to_rcar_lvds_connector(connector);
  40         struct drm_display_mode *mode;
  41
  42         mode = drm_mode_create(connector->dev);
  43         if (mode == NULL)
  44                 return 0;
  45
  46         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
  47
  48         drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
  49
  50         drm_mode_probed_add(connector, mode);
  51
  52         return 1;
  53 }
  54
  55 static int rcar_du_lvds_connector_mode_valid(struct drm_connector *connector,
  56                                             struct drm_display_mode *mode)
  57 {
  58         return MODE_OK;
  59 }
  60
  61 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  62         .get_modes = rcar_du_lvds_connector_get_modes,
  63         .mode_valid = rcar_du_lvds_connector_mode_valid,
  64         .best_encoder = rcar_du_connector_best_encoder,
  65 };
  66
  67 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
  68 {
  69         drm_connector_unregister(connector);
  70         drm_connector_cleanup(connector);
  71 }
  72
  73 static enum drm_connector_status
  74 rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
  75 {
  76         return connector_status_connected;
  77 }
  78
  79 static const struct drm_connector_funcs connector_funcs = {
  80         .dpms = drm_helper_connector_dpms,
  81         .detect = rcar_du_lvds_connector_detect,
  82         .fill_modes = drm_helper_probe_single_connector_modes,
  83         .destroy = rcar_du_lvds_connector_destroy,
  84 };
  85
  86 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
  87                                 struct rcar_du_encoder *renc,
  88                                 const struct rcar_du_panel_data *panel,
  89                                 /* TODO const */ struct device_node *np)
  90 {
  91         struct rcar_du_lvds_connector *lvdscon;
  92         struct drm_connector *connector;
  93         int ret;
  94
  95         lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
  96         if (lvdscon == NULL)
  97                 return -ENOMEM;
  98
  99         if (panel) {
 100                 lvdscon->panel = *panel;
 101         } else {
 102                 struct display_timing timing;
 103
 104                 ret = of_get_display_timing(np, "panel-timing", &timing);
 105                 if (ret < 0)
 106                         return ret;
 107
 108                 videomode_from_timing(&timing, &lvdscon->panel.mode);
 109
 110                 of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
 111                 of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);
 112         }
 113
 114         connector = &lvdscon->connector.connector;
 115         connector->display_info.width_mm = lvdscon->panel.width_mm;
 116         connector->display_info.height_mm = lvdscon->panel.height_mm;
 117
 118         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 119                                  DRM_MODE_CONNECTOR_LVDS);
 120         if (ret < 0)
 121                 return ret;
 122
 123         drm_connector_helper_add(connector, &connector_helper_funcs);
 124         ret = drm_connector_register(connector);
 125         if (ret < 0)
 126                 return ret;
 127
 128         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 129         drm_object_property_set_value(&connector->base,
 130                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 131
 132         ret = drm_mode_connector_attach_encoder(connector, &renc->encoder);
 133         if (ret < 0)
 134                 return ret;
 135
 136         connector->encoder = &renc->encoder;
 137         lvdscon->connector.encoder = renc;
 138
 139         return 0;
 140 }