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

   1 /*
   2  * rcar_du_vgacon.c  --  R-Car Display Unit VGA 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 "rcar_du_drv.h"
  19 #include "rcar_du_encoder.h"
  20 #include "rcar_du_kms.h"
  21 #include "rcar_du_vgacon.h"
  22
  23 static int rcar_du_vga_connector_get_modes(struct drm_connector *connector)
  24 {
  25         return 0;
  26 }
  27
  28 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  29         .get_modes = rcar_du_vga_connector_get_modes,
  30         .best_encoder = rcar_du_connector_best_encoder,
  31 };
  32
  33 static void rcar_du_vga_connector_destroy(struct drm_connector *connector)
  34 {
  35         drm_connector_unregister(connector);
  36         drm_connector_cleanup(connector);
  37 }
  38
  39 static enum drm_connector_status
  40 rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
  41 {
  42         return connector_status_connected;
  43 }
  44
  45 static const struct drm_connector_funcs connector_funcs = {
  46         .dpms = drm_helper_connector_dpms,
  47         .detect = rcar_du_vga_connector_detect,
  48         .fill_modes = drm_helper_probe_single_connector_modes,
  49         .destroy = rcar_du_vga_connector_destroy,
  50 };
  51
  52 int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
  53                                struct rcar_du_encoder *renc)
  54 {
  55         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  56         struct rcar_du_connector *rcon;
  57         struct drm_connector *connector;
  58         int ret;
  59
  60         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  61         if (rcon == NULL)
  62                 return -ENOMEM;
  63
  64         connector = &rcon->connector;
  65         connector->display_info.width_mm = 0;
  66         connector->display_info.height_mm = 0;
  67         connector->interlace_allowed = true;
  68
  69         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
  70                                  DRM_MODE_CONNECTOR_VGA);
  71         if (ret < 0)
  72                 return ret;
  73
  74         drm_connector_helper_add(connector, &connector_helper_funcs);
  75         ret = drm_connector_register(connector);
  76         if (ret < 0)
  77                 return ret;
  78
  79         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
  80         drm_object_property_set_value(&connector->base,
  81                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
  82
  83         ret = drm_mode_connector_attach_encoder(connector, encoder);
  84         if (ret < 0)
  85                 return ret;
  86
  87         connector->encoder = encoder;
  88         rcon->encoder = renc;
  89
  90         return 0;
  91 }