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_atomic_helper.h>
  16 #include <drm/drm_crtc.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_panel.h>
  19
  20 #include <video/display_timing.h>
  21 #include <video/of_display_timing.h>
  22 #include <video/videomode.h>
  23
  24 #include "rcar_du_drv.h"
  25 #include "rcar_du_encoder.h"
  26 #include "rcar_du_kms.h"
  27 #include "rcar_du_lvdscon.h"
  28
  29 static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
  30 {
  31         struct rcar_du_connector *rcon = to_rcar_connector(connector);
  32
  33         return drm_panel_get_modes(rcon->panel);
  34 }
  35
  36 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  37         .get_modes = rcar_du_lvds_connector_get_modes,
  38 };
  39
  40 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
  41 {
  42         struct rcar_du_connector *rcon = to_rcar_connector(connector);
  43
  44         drm_panel_detach(rcon->panel);
  45         drm_connector_cleanup(connector);
  46 }
  47
  48 static const struct drm_connector_funcs connector_funcs = {
  49         .reset = drm_atomic_helper_connector_reset,
  50         .fill_modes = drm_helper_probe_single_connector_modes,
  51         .destroy = rcar_du_lvds_connector_destroy,
  52         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  53         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  54 };
  55
  56 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
  57                                 struct rcar_du_encoder *renc,
  58                                 const struct device_node *np)
  59 {
  60         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  61         struct rcar_du_connector *rcon;
  62         struct drm_connector *connector;
  63         int ret;
  64
  65         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  66         if (rcon == NULL)
  67                 return -ENOMEM;
  68
  69         connector = &rcon->connector;
  70
  71         rcon->panel = of_drm_find_panel(np);
  72         if (!rcon->panel)
  73                 return -EPROBE_DEFER;
  74
  75         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
  76                                  DRM_MODE_CONNECTOR_LVDS);
  77         if (ret < 0)
  78                 return ret;
  79
  80         drm_connector_helper_add(connector, &connector_helper_funcs);
  81
  82         ret = drm_mode_connector_attach_encoder(connector, encoder);
  83         if (ret < 0)
  84                 return ret;
  85
  86         ret = drm_panel_attach(rcon->panel, connector);
  87         if (ret < 0)
  88                 return ret;
  89
  90         rcon->encoder = renc;
  91
  92         return 0;
  93 }