1/*
2 * Copyright (C) 2012 Russell King
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#include <drm/drmP.h>
9#include <drm/drm_crtc_helper.h>
10#include <drm/drm_edid.h>
11#include <drm/drm_encoder_slave.h>
12#include "armada_output.h"
13#include "armada_drm.h"
14
15struct armada_connector {
16	struct drm_connector conn;
17	const struct armada_output_type *type;
18};
19
20#define drm_to_armada_conn(c) container_of(c, struct armada_connector, conn)
21
22struct drm_encoder *armada_drm_connector_encoder(struct drm_connector *conn)
23{
24	struct drm_encoder *enc = conn->encoder;
25
26	return enc ? enc : drm_encoder_find(conn->dev, conn->encoder_ids[0]);
27}
28
29static enum drm_connector_status armada_drm_connector_detect(
30	struct drm_connector *conn, bool force)
31{
32	struct armada_connector *dconn = drm_to_armada_conn(conn);
33	enum drm_connector_status status = connector_status_disconnected;
34
35	if (dconn->type->detect) {
36		status = dconn->type->detect(conn, force);
37	} else {
38		struct drm_encoder *enc = armada_drm_connector_encoder(conn);
39
40		if (enc)
41			status = encoder_helper_funcs(enc)->detect(enc, conn);
42	}
43
44	return status;
45}
46
47static void armada_drm_connector_destroy(struct drm_connector *conn)
48{
49	struct armada_connector *dconn = drm_to_armada_conn(conn);
50
51	drm_connector_unregister(conn);
52	drm_connector_cleanup(conn);
53	kfree(dconn);
54}
55
56static int armada_drm_connector_set_property(struct drm_connector *conn,
57	struct drm_property *property, uint64_t value)
58{
59	struct armada_connector *dconn = drm_to_armada_conn(conn);
60
61	if (!dconn->type->set_property)
62		return -EINVAL;
63
64	return dconn->type->set_property(conn, property, value);
65}
66
67static const struct drm_connector_funcs armada_drm_conn_funcs = {
68	.dpms		= drm_helper_connector_dpms,
69	.fill_modes	= drm_helper_probe_single_connector_modes,
70	.detect		= armada_drm_connector_detect,
71	.destroy	= armada_drm_connector_destroy,
72	.set_property	= armada_drm_connector_set_property,
73};
74
75void armada_drm_encoder_prepare(struct drm_encoder *encoder)
76{
77	encoder_helper_funcs(encoder)->dpms(encoder, DRM_MODE_DPMS_OFF);
78}
79
80void armada_drm_encoder_commit(struct drm_encoder *encoder)
81{
82	encoder_helper_funcs(encoder)->dpms(encoder, DRM_MODE_DPMS_ON);
83}
84
85bool armada_drm_encoder_mode_fixup(struct drm_encoder *encoder,
86	const struct drm_display_mode *mode, struct drm_display_mode *adjusted)
87{
88	return true;
89}
90
91/* Shouldn't this be a generic helper function? */
92int armada_drm_slave_encoder_mode_valid(struct drm_connector *conn,
93	struct drm_display_mode *mode)
94{
95	struct drm_encoder *encoder = armada_drm_connector_encoder(conn);
96	int valid = MODE_BAD;
97
98	if (encoder) {
99		struct drm_encoder_slave *slave = to_encoder_slave(encoder);
100
101		valid = slave->slave_funcs->mode_valid(encoder, mode);
102	}
103	return valid;
104}
105
106int armada_drm_slave_encoder_set_property(struct drm_connector *conn,
107	struct drm_property *property, uint64_t value)
108{
109	struct drm_encoder *encoder = armada_drm_connector_encoder(conn);
110	int rc = -EINVAL;
111
112	if (encoder) {
113		struct drm_encoder_slave *slave = to_encoder_slave(encoder);
114
115		rc = slave->slave_funcs->set_property(encoder, conn, property,
116						      value);
117	}
118	return rc;
119}
120
121int armada_output_create(struct drm_device *dev,
122	const struct armada_output_type *type, const void *data)
123{
124	struct armada_connector *dconn;
125	int ret;
126
127	dconn = kzalloc(sizeof(*dconn), GFP_KERNEL);
128	if (!dconn)
129		return -ENOMEM;
130
131	dconn->type = type;
132
133	ret = drm_connector_init(dev, &dconn->conn, &armada_drm_conn_funcs,
134				 type->connector_type);
135	if (ret) {
136		DRM_ERROR("unable to init connector\n");
137		goto err_destroy_dconn;
138	}
139
140	ret = type->create(&dconn->conn, data);
141	if (ret)
142		goto err_conn;
143
144	ret = drm_connector_register(&dconn->conn);
145	if (ret)
146		goto err_sysfs;
147
148	return 0;
149
150 err_sysfs:
151	if (dconn->conn.encoder)
152		dconn->conn.encoder->funcs->destroy(dconn->conn.encoder);
153 err_conn:
154	drm_connector_cleanup(&dconn->conn);
155 err_destroy_dconn:
156	kfree(dconn);
157	return ret;
158}
159