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 "display/intel_panel.h"
 33
 34#include "i915_drv.h"
 35#include "intel_connector.h"
 36#include "intel_display_types.h"
 37#include "intel_hdcp.h"
 38
 39int intel_connector_init(struct intel_connector *connector)
 40{
 41	struct intel_digital_connector_state *conn_state;
 42
 43	/*
 44	 * Allocate enough memory to hold intel_digital_connector_state,
 45	 * This might be a few bytes too many, but for connectors that don't
 46	 * need it we'll free the state and allocate a smaller one on the first
 47	 * successful commit anyway.
 48	 */
 49	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
 50	if (!conn_state)
 51		return -ENOMEM;
 52
 53	__drm_atomic_helper_connector_reset(&connector->base,
 54					    &conn_state->base);
 55
 56	return 0;
 57}
 58
 59struct intel_connector *intel_connector_alloc(void)
 60{
 61	struct intel_connector *connector;
 62
 63	connector = kzalloc(sizeof(*connector), GFP_KERNEL);
 64	if (!connector)
 65		return NULL;
 66
 67	if (intel_connector_init(connector) < 0) {
 68		kfree(connector);
 69		return NULL;
 70	}
 71
 72	return connector;
 73}
 74
 75/*
 76 * Free the bits allocated by intel_connector_alloc.
 77 * This should only be used after intel_connector_alloc has returned
 78 * successfully, and before drm_connector_init returns successfully.
 79 * Otherwise the destroy callbacks for the connector and the state should
 80 * take care of proper cleanup/free (see intel_connector_destroy).
 81 */
 82void intel_connector_free(struct intel_connector *connector)
 83{
 84	kfree(to_intel_digital_connector_state(connector->base.state));
 85	kfree(connector);
 86}
 87
 88/*
 89 * Connector type independent destroy hook for drm_connector_funcs.
 90 */
 91void intel_connector_destroy(struct drm_connector *connector)
 92{
 93	struct intel_connector *intel_connector = to_intel_connector(connector);
 94
 95	kfree(intel_connector->detect_edid);
 96
 97	intel_hdcp_cleanup(intel_connector);
 98
 99	if (!IS_ERR_OR_NULL(intel_connector->edid))
100		kfree(intel_connector->edid);
101
102	intel_panel_fini(&intel_connector->panel);
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	return 0;
127
128err_backlight:
129	intel_backlight_device_unregister(intel_connector);
130err:
131	return ret;
132}
133
134void intel_connector_unregister(struct drm_connector *connector)
135{
136	struct intel_connector *intel_connector = to_intel_connector(connector);
137
138	intel_backlight_device_unregister(intel_connector);
139}
140
141void intel_connector_attach_encoder(struct intel_connector *connector,
142				    struct intel_encoder *encoder)
143{
144	connector->encoder = encoder;
145	drm_connector_attach_encoder(&connector->base, &encoder->base);
146}
147
148/*
149 * Simple connector->get_hw_state implementation for encoders that support only
150 * one connector and no cloning and hence the encoder state determines the state
151 * of the connector.
152 */
153bool intel_connector_get_hw_state(struct intel_connector *connector)
154{
155	enum pipe pipe = 0;
156	struct intel_encoder *encoder = connector->encoder;
157
158	return encoder->get_hw_state(encoder, &pipe);
159}
160
161enum pipe intel_connector_get_pipe(struct intel_connector *connector)
162{
163	struct drm_device *dev = connector->base.dev;
164
165	WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
166
167	if (!connector->base.state->crtc)
168		return INVALID_PIPE;
169
170	return to_intel_crtc(connector->base.state->crtc)->pipe;
171}
172
173/**
174 * intel_connector_update_modes - update connector from edid
175 * @connector: DRM connector device to use
176 * @edid: previously read EDID information
177 */
178int intel_connector_update_modes(struct drm_connector *connector,
179				struct edid *edid)
180{
181	int ret;
182
183	drm_connector_update_edid_property(connector, edid);
184	ret = drm_add_edid_modes(connector, edid);
185
186	return ret;
187}
188
189/**
190 * intel_ddc_get_modes - get modelist from monitor
191 * @connector: DRM connector device to use
192 * @adapter: i2c adapter
193 *
194 * Fetch the EDID information from @connector using the DDC bus.
195 */
196int intel_ddc_get_modes(struct drm_connector *connector,
197			struct i2c_adapter *adapter)
198{
199	struct edid *edid;
200	int ret;
201
202	edid = drm_get_edid(connector, adapter);
203	if (!edid)
204		return 0;
205
206	ret = intel_connector_update_modes(connector, edid);
207	kfree(edid);
208
209	return ret;
210}
211
212static const struct drm_prop_enum_list force_audio_names[] = {
213	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
214	{ HDMI_AUDIO_OFF, "off" },
215	{ HDMI_AUDIO_AUTO, "auto" },
216	{ HDMI_AUDIO_ON, "on" },
217};
218
219void
220intel_attach_force_audio_property(struct drm_connector *connector)
221{
222	struct drm_device *dev = connector->dev;
223	struct drm_i915_private *dev_priv = to_i915(dev);
224	struct drm_property *prop;
225
226	prop = dev_priv->force_audio_property;
227	if (prop == NULL) {
228		prop = drm_property_create_enum(dev, 0,
229					   "audio",
230					   force_audio_names,
231					   ARRAY_SIZE(force_audio_names));
232		if (prop == NULL)
233			return;
234
235		dev_priv->force_audio_property = prop;
236	}
237	drm_object_attach_property(&connector->base, prop, 0);
238}
239
240static const struct drm_prop_enum_list broadcast_rgb_names[] = {
241	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
242	{ INTEL_BROADCAST_RGB_FULL, "Full" },
243	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
244};
245
246void
247intel_attach_broadcast_rgb_property(struct drm_connector *connector)
248{
249	struct drm_device *dev = connector->dev;
250	struct drm_i915_private *dev_priv = to_i915(dev);
251	struct drm_property *prop;
252
253	prop = dev_priv->broadcast_rgb_property;
254	if (prop == NULL) {
255		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
256					   "Broadcast RGB",
257					   broadcast_rgb_names,
258					   ARRAY_SIZE(broadcast_rgb_names));
259		if (prop == NULL)
260			return;
261
262		dev_priv->broadcast_rgb_property = prop;
263	}
264
265	drm_object_attach_property(&connector->base, prop, 0);
266}
267
268void
269intel_attach_aspect_ratio_property(struct drm_connector *connector)
270{
271	if (!drm_mode_create_aspect_ratio_property(connector->dev))
272		drm_object_attach_property(&connector->base,
273			connector->dev->mode_config.aspect_ratio_property,
274			DRM_MODE_PICTURE_ASPECT_NONE);
275}
276
277void
278intel_attach_colorspace_property(struct drm_connector *connector)
279{
280	if (!drm_mode_create_colorspace_property(connector))
281		drm_object_attach_property(&connector->base,
282					   connector->colorspace_property, 0);
283}