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#include <drm/drm_print.h>
32#include <drm/drm_probe_helper.h>
33
34#include "i915_drv.h"
35#include "i915_utils.h" /* for i915_inject_probe_failure() */
36#include "intel_connector.h"
37#include "intel_display_core.h"
38#include "intel_display_debugfs.h"
39#include "intel_display_types.h"
40#include "intel_hdcp.h"
41#include "intel_panel.h"
42
43static void intel_connector_modeset_retry_work_fn(struct work_struct *work)
44{
45 struct intel_connector *connector = container_of(work, typeof(*connector),
46 modeset_retry_work);
47 struct intel_display *display = to_intel_display(connector);
48
49 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n", connector->base.base.id,
50 connector->base.name);
51
52 /* Grab the locks before changing connector property*/
53 mutex_lock(&display->drm->mode_config.mutex);
54 /* Set connector link status to BAD and send a Uevent to notify
55 * userspace to do a modeset.
56 */
57 drm_connector_set_link_status_property(connector: &connector->base,
58 DRM_MODE_LINK_STATUS_BAD);
59 mutex_unlock(lock: &display->drm->mode_config.mutex);
60 /* Send Hotplug uevent so userspace can reprobe */
61 drm_kms_helper_connector_hotplug_event(connector: &connector->base);
62
63 drm_connector_put(connector: &connector->base);
64}
65
66void intel_connector_queue_modeset_retry_work(struct intel_connector *connector)
67{
68 struct intel_display *display = to_intel_display(connector);
69
70 drm_connector_get(connector: &connector->base);
71 if (!queue_work(wq: display->wq.unordered, work: &connector->modeset_retry_work))
72 drm_connector_put(connector: &connector->base);
73}
74
75void intel_connector_cancel_modeset_retry_work(struct intel_connector *connector)
76{
77 if (cancel_work_sync(work: &connector->modeset_retry_work))
78 drm_connector_put(connector: &connector->base);
79}
80
81static int intel_connector_init(struct intel_connector *connector)
82{
83 struct intel_digital_connector_state *conn_state;
84
85 /*
86 * Allocate enough memory to hold intel_digital_connector_state,
87 * This might be a few bytes too many, but for connectors that don't
88 * need it we'll free the state and allocate a smaller one on the first
89 * successful commit anyway.
90 */
91 conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
92 if (!conn_state)
93 return -ENOMEM;
94
95 __drm_atomic_helper_connector_reset(connector: &connector->base,
96 conn_state: &conn_state->base);
97
98 intel_panel_init_alloc(connector);
99
100 INIT_WORK(&connector->modeset_retry_work,
101 intel_connector_modeset_retry_work_fn);
102
103 return 0;
104}
105
106struct intel_connector *intel_connector_alloc(void)
107{
108 struct intel_connector *connector;
109
110 connector = kzalloc(sizeof(*connector), GFP_KERNEL);
111 if (!connector)
112 return NULL;
113
114 if (intel_connector_init(connector) < 0) {
115 kfree(objp: connector);
116 return NULL;
117 }
118
119 return connector;
120}
121
122/*
123 * Free the bits allocated by intel_connector_alloc.
124 * This should only be used after intel_connector_alloc has returned
125 * successfully, and before drm_connector_init returns successfully.
126 * Otherwise the destroy callbacks for the connector and the state should
127 * take care of proper cleanup/free (see intel_connector_destroy).
128 */
129void intel_connector_free(struct intel_connector *connector)
130{
131 kfree(to_intel_digital_connector_state(connector->base.state));
132 kfree(objp: connector);
133}
134
135/*
136 * Connector type independent destroy hook for drm_connector_funcs.
137 */
138void intel_connector_destroy(struct drm_connector *connector)
139{
140 struct intel_connector *intel_connector = to_intel_connector(connector);
141
142 drm_edid_free(drm_edid: intel_connector->detect_edid);
143
144 intel_hdcp_cleanup(connector: intel_connector);
145
146 intel_panel_fini(connector: intel_connector);
147
148 drm_connector_cleanup(connector);
149
150 if (intel_connector->mst.port)
151 drm_dp_mst_put_port_malloc(port: intel_connector->mst.port);
152
153 kfree(objp: connector);
154}
155
156int intel_connector_register(struct drm_connector *_connector)
157{
158 struct intel_connector *connector = to_intel_connector(_connector);
159 struct drm_i915_private *i915 = to_i915(dev: _connector->dev);
160 int ret;
161
162 ret = intel_panel_register(connector);
163 if (ret)
164 goto err;
165
166 if (i915_inject_probe_failure(i915)) {
167 ret = -EFAULT;
168 goto err_panel;
169 }
170
171 intel_connector_debugfs_add(connector);
172
173 return 0;
174
175err_panel:
176 intel_panel_unregister(connector);
177err:
178 return ret;
179}
180
181void intel_connector_unregister(struct drm_connector *_connector)
182{
183 struct intel_connector *connector = to_intel_connector(_connector);
184
185 intel_panel_unregister(connector);
186}
187
188void intel_connector_attach_encoder(struct intel_connector *connector,
189 struct intel_encoder *encoder)
190{
191 connector->encoder = encoder;
192 drm_connector_attach_encoder(connector: &connector->base, encoder: &encoder->base);
193}
194
195/*
196 * Simple connector->get_hw_state implementation for encoders that support only
197 * one connector and no cloning and hence the encoder state determines the state
198 * of the connector.
199 */
200bool intel_connector_get_hw_state(struct intel_connector *connector)
201{
202 enum pipe pipe = 0;
203 struct intel_encoder *encoder = intel_attached_encoder(connector);
204
205 return encoder->get_hw_state(encoder, &pipe);
206}
207
208enum pipe intel_connector_get_pipe(struct intel_connector *connector)
209{
210 struct intel_display *display = to_intel_display(connector);
211
212 drm_modeset_lock_assert_held(lock: &display->drm->mode_config.connection_mutex);
213
214 if (!connector->base.state->crtc)
215 return INVALID_PIPE;
216
217 return to_intel_crtc(connector->base.state->crtc)->pipe;
218}
219
220/**
221 * intel_connector_update_modes - update connector from edid
222 * @connector: DRM connector device to use
223 * @drm_edid: previously read EDID information
224 */
225int intel_connector_update_modes(struct drm_connector *connector,
226 const struct drm_edid *drm_edid)
227{
228 int ret;
229
230 drm_edid_connector_update(connector, edid: drm_edid);
231 ret = drm_edid_connector_add_modes(connector);
232
233 return ret;
234}
235
236/**
237 * intel_ddc_get_modes - get modelist from monitor
238 * @connector: DRM connector device to use
239 * @ddc: DDC bus i2c adapter
240 *
241 * Fetch the EDID information from @connector using the DDC bus.
242 */
243int intel_ddc_get_modes(struct drm_connector *connector,
244 struct i2c_adapter *ddc)
245{
246 const struct drm_edid *drm_edid;
247 int ret;
248
249 drm_edid = drm_edid_read_ddc(connector, adapter: ddc);
250 if (!drm_edid)
251 return 0;
252
253 ret = intel_connector_update_modes(connector, drm_edid);
254 drm_edid_free(drm_edid);
255
256 return ret;
257}
258
259static const struct drm_prop_enum_list force_audio_names[] = {
260 { HDMI_AUDIO_OFF_DVI, "force-dvi" },
261 { HDMI_AUDIO_OFF, "off" },
262 { HDMI_AUDIO_AUTO, "auto" },
263 { HDMI_AUDIO_ON, "on" },
264};
265
266void
267intel_attach_force_audio_property(struct drm_connector *connector)
268{
269 struct intel_display *display = to_intel_display(connector->dev);
270 struct drm_property *prop;
271
272 prop = display->properties.force_audio;
273 if (prop == NULL) {
274 prop = drm_property_create_enum(dev: display->drm, flags: 0,
275 name: "audio",
276 props: force_audio_names,
277 ARRAY_SIZE(force_audio_names));
278 if (prop == NULL)
279 return;
280
281 display->properties.force_audio = prop;
282 }
283 drm_object_attach_property(obj: &connector->base, property: prop, init_val: 0);
284}
285
286static const struct drm_prop_enum_list broadcast_rgb_names[] = {
287 { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
288 { INTEL_BROADCAST_RGB_FULL, "Full" },
289 { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
290};
291
292void
293intel_attach_broadcast_rgb_property(struct drm_connector *connector)
294{
295 struct intel_display *display = to_intel_display(connector->dev);
296 struct drm_property *prop;
297
298 prop = display->properties.broadcast_rgb;
299 if (prop == NULL) {
300 prop = drm_property_create_enum(dev: display->drm, DRM_MODE_PROP_ENUM,
301 name: "Broadcast RGB",
302 props: broadcast_rgb_names,
303 ARRAY_SIZE(broadcast_rgb_names));
304 if (prop == NULL)
305 return;
306
307 display->properties.broadcast_rgb = prop;
308 }
309
310 drm_object_attach_property(obj: &connector->base, property: prop, init_val: 0);
311}
312
313void
314intel_attach_aspect_ratio_property(struct drm_connector *connector)
315{
316 if (!drm_mode_create_aspect_ratio_property(dev: connector->dev))
317 drm_object_attach_property(obj: &connector->base,
318 property: connector->dev->mode_config.aspect_ratio_property,
319 DRM_MODE_PICTURE_ASPECT_NONE);
320}
321
322void
323intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
324{
325 if (!drm_mode_create_hdmi_colorspace_property(connector, supported_colorspaces: 0))
326 drm_connector_attach_colorspace_property(connector);
327}
328
329void
330intel_attach_dp_colorspace_property(struct drm_connector *connector)
331{
332 if (!drm_mode_create_dp_colorspace_property(connector, supported_colorspaces: 0))
333 drm_connector_attach_colorspace_property(connector);
334}
335
336void
337intel_attach_scaling_mode_property(struct drm_connector *connector)
338{
339 struct intel_display *display = to_intel_display(connector->dev);
340 u32 scaling_modes;
341
342 scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
343 BIT(DRM_MODE_SCALE_FULLSCREEN);
344
345 /* On GMCH platforms borders are only possible on the LVDS port */
346 if (!HAS_GMCH(display) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
347 scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
348
349 drm_connector_attach_scaling_mode_property(connector, scaling_mode_mask: scaling_modes);
350
351 connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
352}
353

source code of linux/drivers/gpu/drm/i915/display/intel_connector.c