LXR linux/drivers/gpu/drm/rcar-du/rcar_du

   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
  23static int rcar_du_vga_connector_get_modes(struct drm_connector *connector)
  24{
  25        return 0;
  26}
  27
  28static 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
  33static void rcar_du_vga_connector_destroy(struct drm_connector *connector)
  34{
  35        drm_connector_unregister(connector);
  36        drm_connector_cleanup(connector);
  37}
  38
  39static enum drm_connector_status
  40rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
  41{
  42        return connector_status_connected;
  43}
  44
  45static 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
  52int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
  53                               struct rcar_du_encoder *renc)
  54{
  55        struct rcar_du_connector *rcon;
  56        struct drm_connector *connector;
  57        int ret;
  58
  59        rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  60        if (rcon == NULL)
  61                return -ENOMEM;
  62
  63        connector = &rcon->connector;
  64        connector->display_info.width_mm = 0;
  65        connector->display_info.height_mm = 0;
  66
  67        ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
  68                                 DRM_MODE_CONNECTOR_VGA);
  69        if (ret < 0)
  70                return ret;
  71
  72        drm_connector_helper_add(connector, &connector_helper_funcs);
  73        ret = drm_connector_register(connector);
  74        if (ret < 0)
  75                return ret;
  76
  77        drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
  78        drm_object_property_set_value(&connector->base,
  79                rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
  80
  81        ret = drm_mode_connector_attach_encoder(connector, &renc->encoder);
  82        if (ret < 0)
  83                return ret;
  84
  85        connector->encoder = &renc->encoder;
  86        rcon->encoder = renc;
  87
  88        return 0;
  89}
  90