1 /*
2 * Copyright 2012-15 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26 #include <linux/version.h>
27 #include <drm/drm_atomic_helper.h>
28 #include "dm_services.h"
29 #include "amdgpu.h"
30 #include "amdgpu_dm.h"
31 #include "amdgpu_dm_mst_types.h"
32
33 #include "dc.h"
34 #include "dm_helpers.h"
35
36 #include "dc_link_ddc.h"
37
38 #include "i2caux_interface.h"
39
40 /* #define TRACE_DPCD */
41
42 #ifdef TRACE_DPCD
43 #define SIDE_BAND_MSG(address) (address >= DP_SIDEBAND_MSG_DOWN_REQ_BASE && address < DP_SINK_COUNT_ESI)
44
side_band_msg_type_to_str(uint32_t address)45 static inline char *side_band_msg_type_to_str(uint32_t address)
46 {
47 static char str[10] = {0};
48
49 if (address < DP_SIDEBAND_MSG_UP_REP_BASE)
50 strcpy(str, "DOWN_REQ");
51 else if (address < DP_SIDEBAND_MSG_DOWN_REP_BASE)
52 strcpy(str, "UP_REP");
53 else if (address < DP_SIDEBAND_MSG_UP_REQ_BASE)
54 strcpy(str, "DOWN_REP");
55 else
56 strcpy(str, "UP_REQ");
57
58 return str;
59 }
60
log_dpcd(uint8_t type,uint32_t address,uint8_t * data,uint32_t size,bool res)61 static void log_dpcd(uint8_t type,
62 uint32_t address,
63 uint8_t *data,
64 uint32_t size,
65 bool res)
66 {
67 DRM_DEBUG_KMS("Op: %s, addr: %04x, SideBand Msg: %s, Op res: %s\n",
68 (type == DP_AUX_NATIVE_READ) ||
69 (type == DP_AUX_I2C_READ) ?
70 "Read" : "Write",
71 address,
72 SIDE_BAND_MSG(address) ?
73 side_band_msg_type_to_str(address) : "Nop",
74 res ? "OK" : "Fail");
75
76 if (res) {
77 print_hex_dump(KERN_INFO, "Body: ", DUMP_PREFIX_NONE, 16, 1, data, size, false);
78 }
79 }
80 #endif
81
dm_dp_aux_transfer(struct drm_dp_aux * aux,struct drm_dp_aux_msg * msg)82 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
83 struct drm_dp_aux_msg *msg)
84 {
85 ssize_t result = 0;
86 struct aux_payload payload;
87 enum aux_channel_operation_result operation_result;
88
89 if (WARN_ON(msg->size > 16))
90 return -E2BIG;
91
92 payload.address = msg->address;
93 payload.data = msg->buffer;
94 payload.length = msg->size;
95 payload.reply = &msg->reply;
96 payload.i2c_over_aux = (msg->request & DP_AUX_NATIVE_WRITE) == 0;
97 payload.write = (msg->request & DP_AUX_I2C_READ) == 0;
98 payload.mot = (msg->request & DP_AUX_I2C_MOT) != 0;
99 payload.defer_delay = 0;
100
101 result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload,
102 &operation_result);
103
104 if (payload.write)
105 result = msg->size;
106
107 if (result < 0)
108 switch (operation_result) {
109 case AUX_CHANNEL_OPERATION_SUCCEEDED:
110 break;
111 case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON:
112 case AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN:
113 result = -EIO;
114 break;
115 case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
116 result = -EBUSY;
117 break;
118 case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
119 result = -ETIMEDOUT;
120 break;
121 }
122
123 return result;
124 }
125
126 static enum drm_connector_status
dm_dp_mst_detect(struct drm_connector * connector,bool force)127 dm_dp_mst_detect(struct drm_connector *connector, bool force)
128 {
129 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
130 struct amdgpu_dm_connector *master = aconnector->mst_port;
131
132 enum drm_connector_status status =
133 drm_dp_mst_detect_port(
134 connector,
135 &master->mst_mgr,
136 aconnector->port);
137
138 return status;
139 }
140
141 static void
dm_dp_mst_connector_destroy(struct drm_connector * connector)142 dm_dp_mst_connector_destroy(struct drm_connector *connector)
143 {
144 struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
145 struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder;
146
147 if (amdgpu_dm_connector->edid) {
148 kfree(amdgpu_dm_connector->edid);
149 amdgpu_dm_connector->edid = NULL;
150 }
151
152 drm_encoder_cleanup(&amdgpu_encoder->base);
153 kfree(amdgpu_encoder);
154 drm_connector_cleanup(connector);
155 drm_dp_mst_put_port_malloc(amdgpu_dm_connector->port);
156 kfree(amdgpu_dm_connector);
157 }
158
159 static int
amdgpu_dm_mst_connector_late_register(struct drm_connector * connector)160 amdgpu_dm_mst_connector_late_register(struct drm_connector *connector)
161 {
162 struct amdgpu_dm_connector *amdgpu_dm_connector =
163 to_amdgpu_dm_connector(connector);
164 struct drm_dp_mst_port *port = amdgpu_dm_connector->port;
165
166 return drm_dp_mst_connector_late_register(connector, port);
167 }
168
169 static void
amdgpu_dm_mst_connector_early_unregister(struct drm_connector * connector)170 amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector)
171 {
172 struct amdgpu_dm_connector *amdgpu_dm_connector =
173 to_amdgpu_dm_connector(connector);
174 struct drm_dp_mst_port *port = amdgpu_dm_connector->port;
175
176 drm_dp_mst_connector_early_unregister(connector, port);
177 }
178
179 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
180 .detect = dm_dp_mst_detect,
181 .fill_modes = drm_helper_probe_single_connector_modes,
182 .destroy = dm_dp_mst_connector_destroy,
183 .reset = amdgpu_dm_connector_funcs_reset,
184 .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
185 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
186 .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
187 .atomic_get_property = amdgpu_dm_connector_atomic_get_property,
188 .late_register = amdgpu_dm_mst_connector_late_register,
189 .early_unregister = amdgpu_dm_mst_connector_early_unregister,
190 };
191
dm_dp_mst_get_modes(struct drm_connector * connector)192 static int dm_dp_mst_get_modes(struct drm_connector *connector)
193 {
194 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
195 int ret = 0;
196
197 if (!aconnector)
198 return drm_add_edid_modes(connector, NULL);
199
200 if (!aconnector->edid) {
201 struct edid *edid;
202 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
203
204 if (!edid) {
205 drm_connector_update_edid_property(
206 &aconnector->base,
207 NULL);
208 return ret;
209 }
210
211 aconnector->edid = edid;
212 }
213
214 if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL) {
215 dc_sink_release(aconnector->dc_sink);
216 aconnector->dc_sink = NULL;
217 }
218
219 if (!aconnector->dc_sink) {
220 struct dc_sink *dc_sink;
221 struct dc_sink_init_data init_params = {
222 .link = aconnector->dc_link,
223 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
224 dc_sink = dc_link_add_remote_sink(
225 aconnector->dc_link,
226 (uint8_t *)aconnector->edid,
227 (aconnector->edid->extensions + 1) * EDID_LENGTH,
228 &init_params);
229
230 dc_sink->priv = aconnector;
231 /* dc_link_add_remote_sink returns a new reference */
232 aconnector->dc_sink = dc_sink;
233
234 if (aconnector->dc_sink)
235 amdgpu_dm_update_freesync_caps(
236 connector, aconnector->edid);
237
238 }
239
240 drm_connector_update_edid_property(
241 &aconnector->base, aconnector->edid);
242
243 ret = drm_add_edid_modes(connector, aconnector->edid);
244
245 return ret;
246 }
247
dm_mst_best_encoder(struct drm_connector * connector)248 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
249 {
250 struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
251
252 return &amdgpu_dm_connector->mst_encoder->base;
253 }
254
255 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
256 .get_modes = dm_dp_mst_get_modes,
257 .mode_valid = amdgpu_dm_connector_mode_valid,
258 .best_encoder = dm_mst_best_encoder,
259 };
260
amdgpu_dm_encoder_destroy(struct drm_encoder * encoder)261 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
262 {
263 drm_encoder_cleanup(encoder);
264 kfree(encoder);
265 }
266
267 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
268 .destroy = amdgpu_dm_encoder_destroy,
269 };
270
271 static struct amdgpu_encoder *
dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector * connector)272 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
273 {
274 struct drm_device *dev = connector->base.dev;
275 struct amdgpu_device *adev = dev->dev_private;
276 struct amdgpu_encoder *amdgpu_encoder;
277 struct drm_encoder *encoder;
278
279 amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
280 if (!amdgpu_encoder)
281 return NULL;
282
283 encoder = &amdgpu_encoder->base;
284 encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
285
286 drm_encoder_init(
287 dev,
288 &amdgpu_encoder->base,
289 &amdgpu_dm_encoder_funcs,
290 DRM_MODE_ENCODER_DPMST,
291 NULL);
292
293 drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
294
295 return amdgpu_encoder;
296 }
297
298 static struct drm_connector *
dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr * mgr,struct drm_dp_mst_port * port,const char * pathprop)299 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
300 struct drm_dp_mst_port *port,
301 const char *pathprop)
302 {
303 struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
304 struct drm_device *dev = master->base.dev;
305 struct amdgpu_device *adev = dev->dev_private;
306 struct amdgpu_dm_connector *aconnector;
307 struct drm_connector *connector;
308
309 aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
310 if (!aconnector)
311 return NULL;
312
313 connector = &aconnector->base;
314 aconnector->port = port;
315 aconnector->mst_port = master;
316
317 if (drm_connector_init(
318 dev,
319 connector,
320 &dm_dp_mst_connector_funcs,
321 DRM_MODE_CONNECTOR_DisplayPort)) {
322 kfree(aconnector);
323 return NULL;
324 }
325 drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
326
327 amdgpu_dm_connector_init_helper(
328 &adev->dm,
329 aconnector,
330 DRM_MODE_CONNECTOR_DisplayPort,
331 master->dc_link,
332 master->connector_id);
333
334 aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
335 drm_connector_attach_encoder(&aconnector->base,
336 &aconnector->mst_encoder->base);
337
338 drm_object_attach_property(
339 &connector->base,
340 dev->mode_config.path_property,
341 0);
342 drm_object_attach_property(
343 &connector->base,
344 dev->mode_config.tile_property,
345 0);
346
347 drm_connector_set_path_property(connector, pathprop);
348
349 /*
350 * Initialize connector state before adding the connectror to drm and
351 * framebuffer lists
352 */
353 amdgpu_dm_connector_funcs_reset(connector);
354
355 DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
356 aconnector, connector->base.id, aconnector->mst_port);
357
358 drm_dp_mst_get_port_malloc(port);
359
360 DRM_DEBUG_KMS(":%d\n", connector->base.id);
361
362 return connector;
363 }
364
dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr * mgr,struct drm_connector * connector)365 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
366 struct drm_connector *connector)
367 {
368 struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
369 struct drm_device *dev = master->base.dev;
370 struct amdgpu_device *adev = dev->dev_private;
371 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
372
373 DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
374 aconnector, connector->base.id, aconnector->mst_port);
375
376 if (aconnector->dc_sink) {
377 amdgpu_dm_update_freesync_caps(connector, NULL);
378 dc_link_remove_remote_sink(aconnector->dc_link,
379 aconnector->dc_sink);
380 dc_sink_release(aconnector->dc_sink);
381 aconnector->dc_sink = NULL;
382 }
383
384 drm_connector_unregister(connector);
385 if (adev->mode_info.rfbdev)
386 drm_fb_helper_remove_one_connector(&adev->mode_info.rfbdev->helper, connector);
387 drm_connector_put(connector);
388 }
389
dm_dp_mst_register_connector(struct drm_connector * connector)390 static void dm_dp_mst_register_connector(struct drm_connector *connector)
391 {
392 struct drm_device *dev = connector->dev;
393 struct amdgpu_device *adev = dev->dev_private;
394
395 if (adev->mode_info.rfbdev)
396 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
397 else
398 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
399
400 drm_connector_register(connector);
401 }
402
403 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
404 .add_connector = dm_dp_add_mst_connector,
405 .destroy_connector = dm_dp_destroy_mst_connector,
406 .register_connector = dm_dp_mst_register_connector
407 };
408
amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager * dm,struct amdgpu_dm_connector * aconnector)409 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
410 struct amdgpu_dm_connector *aconnector)
411 {
412 aconnector->dm_dp_aux.aux.name = "dmdc";
413 aconnector->dm_dp_aux.aux.dev = aconnector->base.kdev;
414 aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
415 aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
416
417 drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
418 drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux,
419 aconnector->base.name, dm->adev->dev);
420 aconnector->mst_mgr.cbs = &dm_mst_cbs;
421 drm_dp_mst_topology_mgr_init(
422 &aconnector->mst_mgr,
423 dm->adev->ddev,
424 &aconnector->dm_dp_aux.aux,
425 16,
426 4,
427 aconnector->connector_id);
428 }
429
430
