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
 27static 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	const 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
 39static 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	const 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
 52static 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
 58static enum drm_connector_status
 59rcar_du_hdmi_connector_detect(struct drm_connector *connector, bool force)
 60{
 61	struct rcar_du_connector *con = to_rcar_connector(connector);
 62	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(con->encoder);
 63	const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
 64
 65	if (sfuncs->detect == NULL)
 66		return connector_status_unknown;
 67
 68	return sfuncs->detect(encoder, connector);
 69}
 70
 71static const struct drm_connector_funcs connector_funcs = {
 72	.dpms = drm_atomic_helper_connector_dpms,
 73	.reset = drm_atomic_helper_connector_reset,
 74	.detect = rcar_du_hdmi_connector_detect,
 75	.fill_modes = drm_helper_probe_single_connector_modes,
 76	.destroy = drm_connector_cleanup,
 77	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 78	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 79};
 80
 81int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
 82				struct rcar_du_encoder *renc)
 83{
 84	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
 85	struct rcar_du_connector *rcon;
 86	struct drm_connector *connector;
 87	int ret;
 88
 89	rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
 90	if (rcon == NULL)
 91		return -ENOMEM;
 92
 93	connector = &rcon->connector;
 94	connector->display_info.width_mm = 0;
 95	connector->display_info.height_mm = 0;
 96	connector->interlace_allowed = true;
 97	connector->polled = DRM_CONNECTOR_POLL_HPD;
 98
 99	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
100				 DRM_MODE_CONNECTOR_HDMIA);
101	if (ret < 0)
102		return ret;
103
104	drm_connector_helper_add(connector, &connector_helper_funcs);
105
106	connector->dpms = 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	rcon->encoder = renc;
115
116	return 0;
117}