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 int rcar_du_vga_connector_mode_valid(struct drm_connector *connector,
  29                                             struct drm_display_mode *mode)
  30 {
  31         return MODE_OK;
  32 }
  33
  34 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  35         .get_modes = rcar_du_vga_connector_get_modes,
  36         .mode_valid = rcar_du_vga_connector_mode_valid,
  37         .best_encoder = rcar_du_connector_best_encoder,
  38 };
  39
  40 static void rcar_du_vga_connector_destroy(struct drm_connector *connector)
  41 {
  42         drm_connector_unregister(connector);
  43         drm_connector_cleanup(connector);
  44 }
  45
  46 static enum drm_connector_status
  47 rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
  48 {
  49         return connector_status_connected;
  50 }
  51
  52 static const struct drm_connector_funcs connector_funcs = {
  53         .dpms = drm_helper_connector_dpms,
  54         .detect = rcar_du_vga_connector_detect,
  55         .fill_modes = drm_helper_probe_single_connector_modes,
  56         .destroy = rcar_du_vga_connector_destroy,
  57 };
  58
  59 int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
  60                                struct rcar_du_encoder *renc)
  61 {
  62         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  63         struct rcar_du_connector *rcon;
  64         struct drm_connector *connector;
  65         int ret;
  66
  67         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  68         if (rcon == NULL)
  69                 return -ENOMEM;
  70
  71         connector = &rcon->connector;
  72         connector->display_info.width_mm = 0;
  73         connector->display_info.height_mm = 0;
  74
  75         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
  76                                  DRM_MODE_CONNECTOR_VGA);
  77         if (ret < 0)
  78                 return ret;
  79
  80         drm_connector_helper_add(connector, &connector_helper_funcs);
  81         ret = drm_connector_register(connector);
  82         if (ret < 0)
  83                 return ret;
  84
  85         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
  86         drm_object_property_set_value(&connector->base,
  87                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
  88
  89         ret = drm_mode_connector_attach_encoder(connector, encoder);
  90         if (ret < 0)
  91                 return ret;
  92
  93         connector->encoder = encoder;
  94         rcon->encoder = renc;
  95
  96         return 0;
  97 }