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

   1 /*
   2  * R-Car Display Unit HDMI Connector
   3  *
   4  * Copyright (C) 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 #include <drm/drm_encoder_slave.h>
  18
  19 #include "rcar_du_drv.h"
  20 #include "rcar_du_encoder.h"
  21 #include "rcar_du_hdmicon.h"
  22 #include "rcar_du_kms.h"
  23
  24 #define to_slave_funcs(e)       (to_rcar_encoder(e)->slave.slave_funcs)
  25
  26 static int rcar_du_hdmi_connector_get_modes(struct drm_connector *connector)
  27 {
  28         struct drm_encoder *encoder = connector->encoder;
  29         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  30
  31         if (sfuncs->get_modes == NULL)
  32                 return 0;
  33
  34         return sfuncs->get_modes(encoder, connector);
  35 }
  36
  37 static int rcar_du_hdmi_connector_mode_valid(struct drm_connector *connector,
  38                                              struct drm_display_mode *mode)
  39 {
  40         struct drm_encoder *encoder = connector->encoder;
  41         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  42
  43         if (sfuncs->mode_valid == NULL)
  44                 return MODE_OK;
  45
  46         return sfuncs->mode_valid(encoder, mode);
  47 }
  48
  49 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  50         .get_modes = rcar_du_hdmi_connector_get_modes,
  51         .mode_valid = rcar_du_hdmi_connector_mode_valid,
  52         .best_encoder = rcar_du_connector_best_encoder,
  53 };
  54
  55 static void rcar_du_hdmi_connector_destroy(struct drm_connector *connector)
  56 {
  57         drm_connector_unregister(connector);
  58         drm_connector_cleanup(connector);
  59 }
  60
  61 static enum drm_connector_status
  62 rcar_du_hdmi_connector_detect(struct drm_connector *connector, bool force)
  63 {
  64         struct drm_encoder *encoder = connector->encoder;
  65         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  66
  67         if (sfuncs->detect == NULL)
  68                 return connector_status_unknown;
  69
  70         return sfuncs->detect(encoder, connector);
  71 }
  72
  73 static const struct drm_connector_funcs connector_funcs = {
  74         .dpms = drm_helper_connector_dpms,
  75         .detect = rcar_du_hdmi_connector_detect,
  76         .fill_modes = drm_helper_probe_single_connector_modes,
  77         .destroy = rcar_du_hdmi_connector_destroy,
  78 };
  79
  80 int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
  81                                 struct rcar_du_encoder *renc)
  82 {
  83         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  84         struct rcar_du_connector *rcon;
  85         struct drm_connector *connector;
  86         int ret;
  87
  88         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  89         if (rcon == NULL)
  90                 return -ENOMEM;
  91
  92         connector = &rcon->connector;
  93         connector->display_info.width_mm = 0;
  94         connector->display_info.height_mm = 0;
  95
  96         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
  97                                  DRM_MODE_CONNECTOR_HDMIA);
  98         if (ret < 0)
  99                 return ret;
 100
 101         drm_connector_helper_add(connector, &connector_helper_funcs);
 102         ret = drm_connector_register(connector);
 103         if (ret < 0)
 104                 return ret;
 105
 106         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 107         drm_object_property_set_value(&connector->base,
 108                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 109
 110         ret = drm_mode_connector_attach_encoder(connector, encoder);
 111         if (ret < 0)
 112                 return ret;
 113
 114         connector->encoder = encoder;
 115         rcon->encoder = renc;
 116
 117         return 0;
 118 }