1/*	$NetBSD: intel_connector.c,v 1.2 2021/12/18 23:45:29 riastradh Exp $	*/
2
3/*
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 * Copyright (c) 2007, 2010 Intel Corporation
6 *   Jesse Barnes <jesse.barnes@intel.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
26 */
27
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: intel_connector.c,v 1.2 2021/12/18 23:45:29 riastradh Exp $");
30
31#include <linux/i2c.h>
32#include <linux/slab.h>
33
34#include <drm/drm_atomic_helper.h>
35#include <drm/drm_edid.h>
36
37#include "display/intel_panel.h"
38
39#include "i915_drv.h"
40#include "intel_connector.h"
41#include "intel_display_types.h"
42#include "intel_hdcp.h"
43
44int intel_connector_init(struct intel_connector *connector)
45{
46	struct intel_digital_connector_state *conn_state;
47
48	/*
49	 * Allocate enough memory to hold intel_digital_connector_state,
50	 * This might be a few bytes too many, but for connectors that don't
51	 * need it we'll free the state and allocate a smaller one on the first
52	 * successful commit anyway.
53	 */
54	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
55	if (!conn_state)
56		return -ENOMEM;
57
58	__drm_atomic_helper_connector_reset(&connector->base,
59					    &conn_state->base);
60
61	return 0;
62}
63
64struct intel_connector *intel_connector_alloc(void)
65{
66	struct intel_connector *connector;
67
68	connector = kzalloc(sizeof(*connector), GFP_KERNEL);
69	if (!connector)
70		return NULL;
71
72	if (intel_connector_init(connector) < 0) {
73		kfree(connector);
74		return NULL;
75	}
76
77	return connector;
78}
79
80/*
81 * Free the bits allocated by intel_connector_alloc.
82 * This should only be used after intel_connector_alloc has returned
83 * successfully, and before drm_connector_init returns successfully.
84 * Otherwise the destroy callbacks for the connector and the state should
85 * take care of proper cleanup/free (see intel_connector_destroy).
86 */
87void intel_connector_free(struct intel_connector *connector)
88{
89	kfree(to_intel_digital_connector_state(connector->base.state));
90	kfree(connector);
91}
92
93/*
94 * Connector type independent destroy hook for drm_connector_funcs.
95 */
96void intel_connector_destroy(struct drm_connector *connector)
97{
98	struct intel_connector *intel_connector = to_intel_connector(connector);
99
100	kfree(intel_connector->detect_edid);
101
102	intel_hdcp_cleanup(intel_connector);
103
104	if (!IS_ERR_OR_NULL(intel_connector->edid))
105		kfree(intel_connector->edid);
106
107	intel_panel_fini(&intel_connector->panel);
108
109	drm_connector_cleanup(connector);
110
111	if (intel_connector->port)
112		drm_dp_mst_put_port_malloc(intel_connector->port);
113
114	kfree(connector);
115}
116
117int intel_connector_register(struct drm_connector *connector)
118{
119	struct intel_connector *intel_connector = to_intel_connector(connector);
120	int ret;
121
122	ret = intel_backlight_device_register(intel_connector);
123	if (ret)
124		goto err;
125
126	if (i915_inject_probe_failure(to_i915(connector->dev))) {
127		ret = -EFAULT;
128		goto err_backlight;
129	}
130
131	return 0;
132
133err_backlight:
134	intel_backlight_device_unregister(intel_connector);
135err:
136	return ret;
137}
138
139void intel_connector_unregister(struct drm_connector *connector)
140{
141	struct intel_connector *intel_connector = to_intel_connector(connector);
142
143	intel_backlight_device_unregister(intel_connector);
144}
145
146void intel_connector_attach_encoder(struct intel_connector *connector,
147				    struct intel_encoder *encoder)
148{
149	connector->encoder = encoder;
150	drm_connector_attach_encoder(&connector->base, &encoder->base);
151}
152
153/*
154 * Simple connector->get_hw_state implementation for encoders that support only
155 * one connector and no cloning and hence the encoder state determines the state
156 * of the connector.
157 */
158bool intel_connector_get_hw_state(struct intel_connector *connector)
159{
160	enum pipe pipe = 0;
161	struct intel_encoder *encoder = connector->encoder;
162
163	return encoder->get_hw_state(encoder, &pipe);
164}
165
166enum pipe intel_connector_get_pipe(struct intel_connector *connector)
167{
168	struct drm_device *dev = connector->base.dev;
169
170	WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
171
172	if (!connector->base.state->crtc)
173		return INVALID_PIPE;
174
175	return to_intel_crtc(connector->base.state->crtc)->pipe;
176}
177
178/**
179 * intel_connector_update_modes - update connector from edid
180 * @connector: DRM connector device to use
181 * @edid: previously read EDID information
182 */
183int intel_connector_update_modes(struct drm_connector *connector,
184				struct edid *edid)
185{
186	int ret;
187
188	drm_connector_update_edid_property(connector, edid);
189	ret = drm_add_edid_modes(connector, edid);
190
191	return ret;
192}
193
194/**
195 * intel_ddc_get_modes - get modelist from monitor
196 * @connector: DRM connector device to use
197 * @adapter: i2c adapter
198 *
199 * Fetch the EDID information from @connector using the DDC bus.
200 */
201int intel_ddc_get_modes(struct drm_connector *connector,
202			struct i2c_adapter *adapter)
203{
204	struct edid *edid;
205	int ret;
206
207	edid = drm_get_edid(connector, adapter);
208	if (!edid)
209		return 0;
210
211	ret = intel_connector_update_modes(connector, edid);
212	kfree(edid);
213
214	return ret;
215}
216
217static const struct drm_prop_enum_list force_audio_names[] = {
218	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
219	{ HDMI_AUDIO_OFF, "off" },
220	{ HDMI_AUDIO_AUTO, "auto" },
221	{ HDMI_AUDIO_ON, "on" },
222};
223
224void
225intel_attach_force_audio_property(struct drm_connector *connector)
226{
227	struct drm_device *dev = connector->dev;
228	struct drm_i915_private *dev_priv = to_i915(dev);
229	struct drm_property *prop;
230
231	prop = dev_priv->force_audio_property;
232	if (prop == NULL) {
233		prop = drm_property_create_enum(dev, 0,
234					   "audio",
235					   force_audio_names,
236					   ARRAY_SIZE(force_audio_names));
237		if (prop == NULL)
238			return;
239
240		dev_priv->force_audio_property = prop;
241	}
242	drm_object_attach_property(&connector->base, prop, 0);
243}
244
245static const struct drm_prop_enum_list broadcast_rgb_names[] = {
246	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
247	{ INTEL_BROADCAST_RGB_FULL, "Full" },
248	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
249};
250
251void
252intel_attach_broadcast_rgb_property(struct drm_connector *connector)
253{
254	struct drm_device *dev = connector->dev;
255	struct drm_i915_private *dev_priv = to_i915(dev);
256	struct drm_property *prop;
257
258	prop = dev_priv->broadcast_rgb_property;
259	if (prop == NULL) {
260		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
261					   "Broadcast RGB",
262					   broadcast_rgb_names,
263					   ARRAY_SIZE(broadcast_rgb_names));
264		if (prop == NULL)
265			return;
266
267		dev_priv->broadcast_rgb_property = prop;
268	}
269
270	drm_object_attach_property(&connector->base, prop, 0);
271}
272
273void
274intel_attach_aspect_ratio_property(struct drm_connector *connector)
275{
276	if (!drm_mode_create_aspect_ratio_property(connector->dev))
277		drm_object_attach_property(&connector->base,
278			connector->dev->mode_config.aspect_ratio_property,
279			DRM_MODE_PICTURE_ASPECT_NONE);
280}
281
282void
283intel_attach_colorspace_property(struct drm_connector *connector)
284{
285	switch (connector->connector_type) {
286	case DRM_MODE_CONNECTOR_HDMIA:
287	case DRM_MODE_CONNECTOR_HDMIB:
288		if (drm_mode_create_hdmi_colorspace_property(connector))
289			return;
290		break;
291	case DRM_MODE_CONNECTOR_DisplayPort:
292	case DRM_MODE_CONNECTOR_eDP:
293		if (drm_mode_create_dp_colorspace_property(connector))
294			return;
295		break;
296	default:
297		DRM_DEBUG_KMS("Colorspace property not supported\n");
298		return;
299	}
300
301	drm_object_attach_property(&connector->base,
302				   connector->colorspace_property, 0);
303}
304