kernel/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 void rcar_du_vga_connector_destroy(struct drm_connector *connector)
  35 {
  36         drm_connector_unregister(connector);
  37         drm_connector_cleanup(connector);
  38 }
  39
  40 static enum drm_connector_status
  41 rcar_du_vga_connector_detect(struct drm_connector *connector, bool force)
  42 {
  43         return connector_status_connected;
  44 }
  45
  46 static const struct drm_connector_funcs connector_funcs = {
  47         .dpms = drm_atomic_helper_connector_dpms,
  48         .reset = drm_atomic_helper_connector_reset,
  49         .detect = rcar_du_vga_connector_detect,
  50         .fill_modes = drm_helper_probe_single_connector_modes,
  51         .destroy = rcar_du_vga_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_vga_connector_init(struct rcar_du_device *rcdu,
  57                                struct rcar_du_encoder *renc)
  58 {
  59         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  60         struct rcar_du_connector *rcon;
  61         struct drm_connector *connector;
  62         int ret;
  63
  64         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  65         if (rcon == NULL)
  66                 return -ENOMEM;
  67
  68         connector = &rcon->connector;
  69         connector->display_info.width_mm = 0;
  70         connector->display_info.height_mm = 0;
  71         connector->interlace_allowed = true;
  72
  73         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
  74                                  DRM_MODE_CONNECTOR_VGA);
  75         if (ret < 0)
  76                 return ret;
  77
  78         drm_connector_helper_add(connector, &connector_helper_funcs);
  79         ret = drm_connector_register(connector);
  80         if (ret < 0)
  81                 return ret;
  82
  83         connector->dpms = DRM_MODE_DPMS_OFF;
  84         drm_object_property_set_value(&connector->base,
  85                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
  86
  87         ret = drm_mode_connector_attach_encoder(connector, encoder);
  88         if (ret < 0)
  89                 return ret;
  90
  91         rcon->encoder = renc;
  92
  93         return 0;
  94 }