kernel/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_atomic_helper.h>
  16 #include <drm/drm_crtc.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_encoder_slave.h>
  19
  20 #include "rcar_du_drv.h"
  21 #include "rcar_du_encoder.h"
  22 #include "rcar_du_hdmicon.h"
  23 #include "rcar_du_kms.h"
  24
  25 #define to_slave_funcs(e)       (to_rcar_encoder(e)->slave.slave_funcs)
  26
  27 static int rcar_du_hdmi_connector_get_modes(struct drm_connector *connector)
  28 {
  29         struct rcar_du_connector *con = to_rcar_connector(connector);
  30         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
  31         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  32
  33         if (sfuncs->get_modes == NULL)
  34                 return 0;
  35
  36         return sfuncs->get_modes(encoder, connector);
  37 }
  38
  39 static int rcar_du_hdmi_connector_mode_valid(struct drm_connector *connector,
  40                                              struct drm_display_mode *mode)
  41 {
  42         struct rcar_du_connector *con = to_rcar_connector(connector);
  43         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
  44         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  45
  46         if (sfuncs->mode_valid == NULL)
  47                 return MODE_OK;
  48
  49         return sfuncs->mode_valid(encoder, mode);
  50 }
  51
  52 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  53         .get_modes = rcar_du_hdmi_connector_get_modes,
  54         .mode_valid = rcar_du_hdmi_connector_mode_valid,
  55         .best_encoder = rcar_du_connector_best_encoder,
  56 };
  57
  58 static void rcar_du_hdmi_connector_destroy(struct drm_connector *connector)
  59 {
  60         drm_connector_unregister(connector);
  61         drm_connector_cleanup(connector);
  62 }
  63
  64 static enum drm_connector_status
  65 rcar_du_hdmi_connector_detect(struct drm_connector *connector, bool force)
  66 {
  67         struct rcar_du_connector *con = to_rcar_connector(connector);
  68         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
  69         struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
  70
  71         if (sfuncs->detect == NULL)
  72                 return connector_status_unknown;
  73
  74         return sfuncs->detect(encoder, connector);
  75 }
  76
  77 static const struct drm_connector_funcs connector_funcs = {
  78         .dpms = drm_atomic_helper_connector_dpms,
  79         .reset = drm_atomic_helper_connector_reset,
  80         .detect = rcar_du_hdmi_connector_detect,
  81         .fill_modes = drm_helper_probe_single_connector_modes,
  82         .destroy = rcar_du_hdmi_connector_destroy,
  83         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  84         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  85 };
  86
  87 int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
  88                                 struct rcar_du_encoder *renc)
  89 {
  90         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  91         struct rcar_du_connector *rcon;
  92         struct drm_connector *connector;
  93         int ret;
  94
  95         rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
  96         if (rcon == NULL)
  97                 return -ENOMEM;
  98
  99         connector = &rcon->connector;
 100         connector->display_info.width_mm = 0;
 101         connector->display_info.height_mm = 0;
 102         connector->interlace_allowed = true;
 103         connector->polled = DRM_CONNECTOR_POLL_HPD;
 104
 105         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 106                                  DRM_MODE_CONNECTOR_HDMIA);
 107         if (ret < 0)
 108                 return ret;
 109
 110         drm_connector_helper_add(connector, &connector_helper_funcs);
 111         ret = drm_connector_register(connector);
 112         if (ret < 0)
 113                 return ret;
 114
 115         connector->dpms = DRM_MODE_DPMS_OFF;
 116         drm_object_property_set_value(&connector->base,
 117                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 118
 119         ret = drm_mode_connector_attach_encoder(connector, encoder);
 120         if (ret < 0)
 121                 return ret;
 122
 123         rcon->encoder = renc;
 124
 125         return 0;
 126 }