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	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	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 void rcar_du_hdmi_connector_destroy(struct drm_connector *connector)
59{
60	drm_connector_unregister(connector);
61	drm_connector_cleanup(connector);
62}
63
64static enum drm_connector_status
65rcar_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
77static 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
87int 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}
127