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_atomic_helper.h>
  16 #include <drm/drm_crtc.h>
  17 #include <drm/drm_crtc_helper.h>
  18
  19 #include "rcar_du_drv.h"
  20 #include "rcar_du_encoder.h"
  21 #include "rcar_du_kms.h"
  22 #include "rcar_du_vgacon.h"
  23
  24 static int rcar_du_vga_connector_get_modes(struct drm_connector *connector)
  25 {
  26         return 0;
  27 }
  28
  29 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  30         .get_modes = rcar_du_vga_connector_get_modes,
  31         .best_encoder = rcar_du_connector_best_encoder,
  32 };
  33
  34 static enum drm_connector_status
  35 rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
  36 {
  37         return connector_status_connected;
  38 }
  39
  40 static const struct drm_connector_funcs connector_funcs = {
  41         .dpms = drm_atomic_helper_connector_dpms,
  42         .reset = drm_atomic_helper_connector_reset,
  43         .detect = rcar_du_vga_connector_detect,
  44         .fill_modes = drm_helper_probe_single_connector_modes,
  45         .destroy = drm_connector_cleanup,
  46         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  47         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  48 };
  49
  50 int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
  51                                struct rcar_du_encoder *renc)
  52 {
  53         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  54         struct rcar_du_connector *rcon;
  55         struct drm_connector *connector;
  56         int ret;
  57
  58         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  59         if (rcon == NULL)
  60                 return -ENOMEM;
  61
  62         connector = &rcon->connector;
  63         connector->display_info.width_mm = 0;
  64         connector->display_info.height_mm = 0;
  65         connector->interlace_allowed = true;
  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
  74         connector->dpms = DRM_MODE_DPMS_OFF;
  75         drm_object_property_set_value(&connector->base,
  76                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
  77
  78         ret = drm_mode_connector_attach_encoder(connector, encoder);
  79         if (ret < 0)
  80                 return ret;
  81
  82         rcon->encoder = renc;
  83
  84         return 0;
  85 }