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	INIT_LIST_HEAD(&connector->panel.fixed_modes);
 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	kfree(intel_connector->detect_edid);
 99
100	intel_hdcp_cleanup(intel_connector);
101
102	if (!IS_ERR_OR_NULL(intel_connector->edid))
103		kfree(intel_connector->edid);
104
105	intel_panel_fini(intel_connector);
106
107	drm_connector_cleanup(connector);
108
109	if (intel_connector->port)
110		drm_dp_mst_put_port_malloc(intel_connector->port);
111
112	kfree(connector);
113}
114
115int intel_connector_register(struct drm_connector *connector)
116{
117	struct intel_connector *intel_connector = to_intel_connector(connector);
118	int ret;
119
120	ret = intel_backlight_device_register(intel_connector);
121	if (ret)
122		goto err;
123
124	if (i915_inject_probe_failure(to_i915(connector->dev))) {
125		ret = -EFAULT;
126		goto err_backlight;
127	}
128
129	intel_connector_debugfs_add(intel_connector);
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 = intel_attached_encoder(connector);
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	drm_WARN_ON(dev,
171		    !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
172
173	if (!connector->base.state->crtc)
174		return INVALID_PIPE;
175
176	return to_intel_crtc(connector->base.state->crtc)->pipe;
177}
178
179/**
180 * intel_connector_update_modes - update connector from edid
181 * @connector: DRM connector device to use
182 * @edid: previously read EDID information
183 */
184int intel_connector_update_modes(struct drm_connector *connector,
185				struct edid *edid)
186{
187	int ret;
188
189	drm_connector_update_edid_property(connector, edid);
190	ret = drm_add_edid_modes(connector, edid);
191
192	return ret;
193}
194
195/**
196 * intel_ddc_get_modes - get modelist from monitor
197 * @connector: DRM connector device to use
198 * @adapter: i2c adapter
199 *
200 * Fetch the EDID information from @connector using the DDC bus.
201 */
202int intel_ddc_get_modes(struct drm_connector *connector,
203			struct i2c_adapter *adapter)
204{
205	struct edid *edid;
206	int ret;
207
208	edid = drm_get_edid(connector, adapter);
209	if (!edid)
210		return 0;
211
212	ret = intel_connector_update_modes(connector, edid);
213	kfree(edid);
214
215	return ret;
216}
217
218static const struct drm_prop_enum_list force_audio_names[] = {
219	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
220	{ HDMI_AUDIO_OFF, "off" },
221	{ HDMI_AUDIO_AUTO, "auto" },
222	{ HDMI_AUDIO_ON, "on" },
223};
224
225void
226intel_attach_force_audio_property(struct drm_connector *connector)
227{
228	struct drm_device *dev = connector->dev;
229	struct drm_i915_private *dev_priv = to_i915(dev);
230	struct drm_property *prop;
231
232	prop = dev_priv->display.properties.force_audio;
233	if (prop == NULL) {
234		prop = drm_property_create_enum(dev, 0,
235					   "audio",
236					   force_audio_names,
237					   ARRAY_SIZE(force_audio_names));
238		if (prop == NULL)
239			return;
240
241		dev_priv->display.properties.force_audio = prop;
242	}
243	drm_object_attach_property(&connector->base, prop, 0);
244}
245
246static const struct drm_prop_enum_list broadcast_rgb_names[] = {
247	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
248	{ INTEL_BROADCAST_RGB_FULL, "Full" },
249	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
250};
251
252void
253intel_attach_broadcast_rgb_property(struct drm_connector *connector)
254{
255	struct drm_device *dev = connector->dev;
256	struct drm_i915_private *dev_priv = to_i915(dev);
257	struct drm_property *prop;
258
259	prop = dev_priv->display.properties.broadcast_rgb;
260	if (prop == NULL) {
261		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
262					   "Broadcast RGB",
263					   broadcast_rgb_names,
264					   ARRAY_SIZE(broadcast_rgb_names));
265		if (prop == NULL)
266			return;
267
268		dev_priv->display.properties.broadcast_rgb = prop;
269	}
270
271	drm_object_attach_property(&connector->base, prop, 0);
272}
273
274void
275intel_attach_aspect_ratio_property(struct drm_connector *connector)
276{
277	if (!drm_mode_create_aspect_ratio_property(connector->dev))
278		drm_object_attach_property(&connector->base,
279			connector->dev->mode_config.aspect_ratio_property,
280			DRM_MODE_PICTURE_ASPECT_NONE);
281}
282
283void
284intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
285{
286	if (!drm_mode_create_hdmi_colorspace_property(connector))
287		drm_connector_attach_colorspace_property(connector);
288}
289
290void
291intel_attach_dp_colorspace_property(struct drm_connector *connector)
292{
293	if (!drm_mode_create_dp_colorspace_property(connector))
294		drm_connector_attach_colorspace_property(connector);
295}
296
297void
298intel_attach_scaling_mode_property(struct drm_connector *connector)
299{
300	struct drm_i915_private *i915 = to_i915(connector->dev);
301	u32 scaling_modes;
302
303	scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
304		BIT(DRM_MODE_SCALE_FULLSCREEN);
305
306	/* On GMCH platforms borders are only possible on the LVDS port */
307	if (!HAS_GMCH(i915) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
308		scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
309
310	drm_connector_attach_scaling_mode_property(connector, scaling_modes);
311
312	connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
313}