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 rcar_du_connector *con = to_rcar_connector(connector);
  29         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
  30         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  31
  32         if (sfuncs->get_modes == NULL)
  33                 return 0;
  34
  35         return sfuncs->get_modes(encoder, connector);
  36 }
  37
  38 static int rcar_du_hdmi_connector_mode_valid(struct drm_connector *connector,
  39                                              struct drm_display_mode *mode)
  40 {
  41         struct rcar_du_connector *con = to_rcar_connector(connector);
  42         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
  43         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  44
  45         if (sfuncs->mode_valid == NULL)
  46                 return MODE_OK;
  47
  48         return sfuncs->mode_valid(encoder, mode);
  49 }
  50
  51 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  52         .get_modes = rcar_du_hdmi_connector_get_modes,
  53         .mode_valid = rcar_du_hdmi_connector_mode_valid,
  54         .best_encoder = rcar_du_connector_best_encoder,
  55 };
  56
  57 static void rcar_du_hdmi_connector_destroy(struct drm_connector *connector)
  58 {
  59         drm_connector_unregister(connector);
  60         drm_connector_cleanup(connector);
  61 }
  62
  63 static enum drm_connector_status
  64 rcar_du_hdmi_connector_detect(struct drm_connector *connector, bool force)
  65 {
  66         struct rcar_du_connector *con = to_rcar_connector(connector);
  67         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
  68         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  69
  70         if (sfuncs->detect == NULL)
  71                 return connector_status_unknown;
  72
  73         return sfuncs->detect(encoder, connector);
  74 }
  75
  76 static const struct drm_connector_funcs connector_funcs = {
  77         .dpms = drm_helper_connector_dpms,
  78         .detect = rcar_du_hdmi_connector_detect,
  79         .fill_modes = drm_helper_probe_single_connector_modes,
  80         .destroy = rcar_du_hdmi_connector_destroy,
  81 };
  82
  83 int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
  84                                 struct rcar_du_encoder *renc)
  85 {
  86         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  87         struct rcar_du_connector *rcon;
  88         struct drm_connector *connector;
  89         int ret;
  90
  91         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  92         if (rcon == NULL)
  93                 return -ENOMEM;
  94
  95         connector = &rcon->connector;
  96         connector->display_info.width_mm = 0;
  97         connector->display_info.height_mm = 0;
  98         connector->interlace_allowed = true;
  99         connector->polled = DRM_CONNECTOR_POLL_HPD;
 100
 101         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 102                                  DRM_MODE_CONNECTOR_HDMIA);
 103         if (ret < 0)
 104                 return ret;
 105
 106         drm_connector_helper_add(connector, &connector_helper_funcs);
 107         ret = drm_connector_register(connector);
 108         if (ret < 0)
 109                 return ret;
 110
 111         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 112         drm_object_property_set_value(&connector->base,
 113                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 114
 115         ret = drm_mode_connector_attach_encoder(connector, encoder);
 116         if (ret < 0)
 117                 return ret;
 118
 119         connector->encoder = encoder;
 120         rcon->encoder = renc;
 121
 122         return 0;
 123 }