1/*
2 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
3 * Copyright (c) 2007, 2010 Intel Corporation
4 *   Jesse Barnes <jesse.barnes@intel.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 */
25
26#include <linux/i2c.h>
27#include <linux/slab.h>
28
29#include <drm/drm_atomic_helper.h>
30#include <drm/drm_edid.h>
31
32#include "i915_drv.h"
33#include "intel_backlight.h"
34#include "intel_connector.h"
35#include "intel_display_debugfs.h"
36#include "intel_display_types.h"
37#include "intel_hdcp.h"
38#include "intel_panel.h"
39
40int intel_connector_init(struct intel_connector *connector)
41{
42	struct intel_digital_connector_state *conn_state;
43
44	/*
45	 * Allocate enough memory to hold intel_digital_connector_state,
46	 * This might be a few bytes too many, but for connectors that don't
47	 * need it we'll free the state and allocate a smaller one on the first
48	 * successful commit anyway.
49	 */
50	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
51	if (!conn_state)
52		return -ENOMEM;
53
54	__drm_atomic_helper_connector_reset(&connector->base,
55					    &conn_state->base);
56
57	intel_panel_init_alloc(connector);
58
59	return 0;
60}
61
62struct intel_connector *intel_connector_alloc(void)
63{
64	struct intel_connector *connector;
65
66	connector = kzalloc(sizeof(*connector), GFP_KERNEL);
67	if (!connector)
68		return NULL;
69
70	if (intel_connector_init(connector) < 0) {
71		kfree(connector);
72		return NULL;
73	}
74
75	return connector;
76}
77
78/*
79 * Free the bits allocated by intel_connector_alloc.
80 * This should only be used after intel_connector_alloc has returned
81 * successfully, and before drm_connector_init returns successfully.
82 * Otherwise the destroy callbacks for the connector and the state should
83 * take care of proper cleanup/free (see intel_connector_destroy).
84 */
85void intel_connector_free(struct intel_connector *connector)
86{
87	kfree(to_intel_digital_connector_state(connector->base.state));
88	kfree(connector);
89}
90
91/*
92 * Connector type independent destroy hook for drm_connector_funcs.
93 */
94void intel_connector_destroy(struct drm_connector *connector)
95{
96	struct intel_connector *intel_connector = to_intel_connector(connector);
97
98	drm_edid_free(intel_connector->detect_edid);
99
100	intel_hdcp_cleanup(intel_connector);
101
102	intel_panel_fini(intel_connector);
103
104	drm_connector_cleanup(connector);
105
106	if (intel_connector->port)
107		drm_dp_mst_put_port_malloc(intel_connector->port);
108
109	kfree(connector);
110}
111
112int intel_connector_register(struct drm_connector *connector)
113{
114	struct intel_connector *intel_connector = to_intel_connector(connector);
115	int ret;
116
117	ret = intel_backlight_device_register(intel_connector);
118	if (ret)
119		goto err;
120
121	if (i915_inject_probe_failure(to_i915(connector->dev))) {
122		ret = -EFAULT;
123		goto err_backlight;
124	}
125
126	intel_connector_debugfs_add(intel_connector);
127
128	return 0;
129
130err_backlight:
131	intel_backlight_device_unregister(intel_connector);
132err:
133	return ret;
134}
135
136void intel_connector_unregister(struct drm_connector *connector)
137{
138	struct intel_connector *intel_connector = to_intel_connector(connector);
139
140	intel_backlight_device_unregister(intel_connector);
141}
142
143void intel_connector_attach_encoder(struct intel_connector *connector,
144				    struct intel_encoder *encoder)
145{
146	connector->encoder = encoder;
147	drm_connector_attach_encoder(&connector->base, &encoder->base);
148}
149
150/*
151 * Simple connector->get_hw_state implementation for encoders that support only
152 * one connector and no cloning and hence the encoder state determines the state
153 * of the connector.
154 */
155bool intel_connector_get_hw_state(struct intel_connector *connector)
156{
157	enum pipe pipe = 0;
158	struct intel_encoder *encoder = intel_attached_encoder(connector);
159
160	return encoder->get_hw_state(encoder, &pipe);
161}
162
163enum pipe intel_connector_get_pipe(struct intel_connector *connector)
164{
165	struct drm_device *dev = connector->base.dev;
166
167	drm_WARN_ON(dev,
168		    !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
169
170	if (!connector->base.state->crtc)
171		return INVALID_PIPE;
172
173	return to_intel_crtc(connector->base.state->crtc)->pipe;
174}
175
176/**
177 * intel_connector_update_modes - update connector from edid
178 * @connector: DRM connector device to use
179 * @drm_edid: previously read EDID information
180 */
181int intel_connector_update_modes(struct drm_connector *connector,
182				 const struct drm_edid *drm_edid)
183{
184	int ret;
185
186	drm_edid_connector_update(connector, drm_edid);
187	ret = drm_edid_connector_add_modes(connector);
188
189	return ret;
190}
191
192/**
193 * intel_ddc_get_modes - get modelist from monitor
194 * @connector: DRM connector device to use
195 * @ddc: DDC bus i2c adapter
196 *
197 * Fetch the EDID information from @connector using the DDC bus.
198 */
199int intel_ddc_get_modes(struct drm_connector *connector,
200			struct i2c_adapter *ddc)
201{
202	const struct drm_edid *drm_edid;
203	int ret;
204
205	drm_edid = drm_edid_read_ddc(connector, ddc);
206	if (!drm_edid)
207		return 0;
208
209	ret = intel_connector_update_modes(connector, drm_edid);
210	drm_edid_free(drm_edid);
211
212	return ret;
213}
214
215static const struct drm_prop_enum_list force_audio_names[] = {
216	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
217	{ HDMI_AUDIO_OFF, "off" },
218	{ HDMI_AUDIO_AUTO, "auto" },
219	{ HDMI_AUDIO_ON, "on" },
220};
221
222void
223intel_attach_force_audio_property(struct drm_connector *connector)
224{
225	struct drm_device *dev = connector->dev;
226	struct drm_i915_private *dev_priv = to_i915(dev);
227	struct drm_property *prop;
228
229	prop = dev_priv->display.properties.force_audio;
230	if (prop == NULL) {
231		prop = drm_property_create_enum(dev, 0,
232					   "audio",
233					   force_audio_names,
234					   ARRAY_SIZE(force_audio_names));
235		if (prop == NULL)
236			return;
237
238		dev_priv->display.properties.force_audio = prop;
239	}
240	drm_object_attach_property(&connector->base, prop, 0);
241}
242
243static const struct drm_prop_enum_list broadcast_rgb_names[] = {
244	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
245	{ INTEL_BROADCAST_RGB_FULL, "Full" },
246	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
247};
248
249void
250intel_attach_broadcast_rgb_property(struct drm_connector *connector)
251{
252	struct drm_device *dev = connector->dev;
253	struct drm_i915_private *dev_priv = to_i915(dev);
254	struct drm_property *prop;
255
256	prop = dev_priv->display.properties.broadcast_rgb;
257	if (prop == NULL) {
258		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
259					   "Broadcast RGB",
260					   broadcast_rgb_names,
261					   ARRAY_SIZE(broadcast_rgb_names));
262		if (prop == NULL)
263			return;
264
265		dev_priv->display.properties.broadcast_rgb = prop;
266	}
267
268	drm_object_attach_property(&connector->base, prop, 0);
269}
270
271void
272intel_attach_aspect_ratio_property(struct drm_connector *connector)
273{
274	if (!drm_mode_create_aspect_ratio_property(connector->dev))
275		drm_object_attach_property(&connector->base,
276			connector->dev->mode_config.aspect_ratio_property,
277			DRM_MODE_PICTURE_ASPECT_NONE);
278}
279
280void
281intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
282{
283	if (!drm_mode_create_hdmi_colorspace_property(connector, 0))
284		drm_connector_attach_colorspace_property(connector);
285}
286
287void
288intel_attach_dp_colorspace_property(struct drm_connector *connector)
289{
290	if (!drm_mode_create_dp_colorspace_property(connector, 0))
291		drm_connector_attach_colorspace_property(connector);
292}
293
294void
295intel_attach_scaling_mode_property(struct drm_connector *connector)
296{
297	struct drm_i915_private *i915 = to_i915(connector->dev);
298	u32 scaling_modes;
299
300	scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
301		BIT(DRM_MODE_SCALE_FULLSCREEN);
302
303	/* On GMCH platforms borders are only possible on the LVDS port */
304	if (!HAS_GMCH(i915) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
305		scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
306
307	drm_connector_attach_scaling_mode_property(connector, scaling_modes);
308
309	connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
310}
311