1 /*
2  * Copyright 2015 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/string.h>
27 #include <linux/acpi.h>
28 #include <linux/version.h>
29 #include <linux/i2c.h>
30 
31 #include <drm/drmP.h>
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/amdgpu_drm.h>
34 #include <drm/drm_edid.h>
35 
36 #include "dm_services.h"
37 #include "amdgpu.h"
38 #include "dc.h"
39 #include "amdgpu_dm.h"
40 #include "amdgpu_dm_irq.h"
41 
42 #include "dm_helpers.h"
43 
44 /* dm_helpers_parse_edid_caps
45  *
46  * Parse edid caps
47  *
48  * @edid:	[in] pointer to edid
49  *  edid_caps:	[in] pointer to edid caps
50  * @return
51  *	void
52  * */
53 enum dc_edid_status dm_helpers_parse_edid_caps(
54 		struct dc_context *ctx,
55 		const struct dc_edid *edid,
56 		struct dc_edid_caps *edid_caps)
57 {
58 	struct edid *edid_buf = (struct edid *) edid->raw_edid;
59 	struct cea_sad *sads;
60 	int sad_count = -1;
61 	int sadb_count = -1;
62 	int i = 0;
63 	int j = 0;
64 	uint8_t *sadb = NULL;
65 
66 	enum dc_edid_status result = EDID_OK;
67 
68 	if (!edid_caps || !edid)
69 		return EDID_BAD_INPUT;
70 
71 	if (!drm_edid_is_valid(edid_buf))
72 		result = EDID_BAD_CHECKSUM;
73 
74 	edid_caps->manufacturer_id = (uint16_t) edid_buf->mfg_id[0] |
75 					((uint16_t) edid_buf->mfg_id[1])<<8;
76 	edid_caps->product_id = (uint16_t) edid_buf->prod_code[0] |
77 					((uint16_t) edid_buf->prod_code[1])<<8;
78 	edid_caps->serial_number = edid_buf->serial;
79 	edid_caps->manufacture_week = edid_buf->mfg_week;
80 	edid_caps->manufacture_year = edid_buf->mfg_year;
81 
82 	/* One of the four detailed_timings stores the monitor name. It's
83 	 * stored in an array of length 13. */
84 	for (i = 0; i < 4; i++) {
85 		if (edid_buf->detailed_timings[i].data.other_data.type == 0xfc) {
86 			while (j < 13 && edid_buf->detailed_timings[i].data.other_data.data.str.str[j]) {
87 				if (edid_buf->detailed_timings[i].data.other_data.data.str.str[j] == '\n')
88 					break;
89 
90 				edid_caps->display_name[j] =
91 					edid_buf->detailed_timings[i].data.other_data.data.str.str[j];
92 				j++;
93 			}
94 		}
95 	}
96 
97 	edid_caps->edid_hdmi = drm_detect_hdmi_monitor(
98 			(struct edid *) edid->raw_edid);
99 
100 	sad_count = drm_edid_to_sad((struct edid *) edid->raw_edid, &sads);
101 	if (sad_count <= 0) {
102 		DRM_INFO("SADs count is: %d, don't need to read it\n",
103 				sad_count);
104 		return result;
105 	}
106 
107 	edid_caps->audio_mode_count = sad_count < DC_MAX_AUDIO_DESC_COUNT ? sad_count : DC_MAX_AUDIO_DESC_COUNT;
108 	for (i = 0; i < edid_caps->audio_mode_count; ++i) {
109 		struct cea_sad *sad = &sads[i];
110 
111 		edid_caps->audio_modes[i].format_code = sad->format;
112 		edid_caps->audio_modes[i].channel_count = sad->channels;
113 		edid_caps->audio_modes[i].sample_rate = sad->freq;
114 		edid_caps->audio_modes[i].sample_size = sad->byte2;
115 	}
116 
117 	sadb_count = drm_edid_to_speaker_allocation((struct edid *) edid->raw_edid, &sadb);
118 
119 	if (sadb_count < 0) {
120 		DRM_ERROR("Couldn't read Speaker Allocation Data Block: %d\n", sadb_count);
121 		sadb_count = 0;
122 	}
123 
124 	if (sadb_count)
125 		edid_caps->speaker_flags = sadb[0];
126 	else
127 		edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION;
128 
129 	kfree(sads);
130 	kfree(sadb);
131 
132 	return result;
133 }
134 
135 static void get_payload_table(
136 		struct amdgpu_dm_connector *aconnector,
137 		struct dp_mst_stream_allocation_table *proposed_table)
138 {
139 	int i;
140 	struct drm_dp_mst_topology_mgr *mst_mgr =
141 			&aconnector->mst_port->mst_mgr;
142 
143 	mutex_lock(&mst_mgr->payload_lock);
144 
145 	proposed_table->stream_count = 0;
146 
147 	/* number of active streams */
148 	for (i = 0; i < mst_mgr->max_payloads; i++) {
149 		if (mst_mgr->payloads[i].num_slots == 0)
150 			break; /* end of vcp_id table */
151 
152 		ASSERT(mst_mgr->payloads[i].payload_state !=
153 				DP_PAYLOAD_DELETE_LOCAL);
154 
155 		if (mst_mgr->payloads[i].payload_state == DP_PAYLOAD_LOCAL ||
156 			mst_mgr->payloads[i].payload_state ==
157 					DP_PAYLOAD_REMOTE) {
158 
159 			struct dp_mst_stream_allocation *sa =
160 					&proposed_table->stream_allocations[
161 						proposed_table->stream_count];
162 
163 			sa->slot_count = mst_mgr->payloads[i].num_slots;
164 			sa->vcp_id = mst_mgr->proposed_vcpis[i]->vcpi;
165 			proposed_table->stream_count++;
166 		}
167 	}
168 
169 	mutex_unlock(&mst_mgr->payload_lock);
170 }
171 
172 /*
173  * Writes payload allocation table in immediate downstream device.
174  */
175 bool dm_helpers_dp_mst_write_payload_allocation_table(
176 		struct dc_context *ctx,
177 		const struct dc_stream_state *stream,
178 		struct dp_mst_stream_allocation_table *proposed_table,
179 		bool enable)
180 {
181 	struct amdgpu_dm_connector *aconnector;
182 	struct drm_dp_mst_topology_mgr *mst_mgr;
183 	struct drm_dp_mst_port *mst_port;
184 	int slots = 0;
185 	bool ret;
186 	int clock;
187 	int bpp = 0;
188 	int pbn = 0;
189 
190 	aconnector = stream->sink->priv;
191 
192 	if (!aconnector || !aconnector->mst_port)
193 		return false;
194 
195 	mst_mgr = &aconnector->mst_port->mst_mgr;
196 
197 	if (!mst_mgr->mst_state)
198 		return false;
199 
200 	mst_port = aconnector->port;
201 
202 	if (enable) {
203 		clock = stream->timing.pix_clk_khz;
204 
205 		switch (stream->timing.display_color_depth) {
206 
207 		case COLOR_DEPTH_666:
208 			bpp = 6;
209 			break;
210 		case COLOR_DEPTH_888:
211 			bpp = 8;
212 			break;
213 		case COLOR_DEPTH_101010:
214 			bpp = 10;
215 			break;
216 		case COLOR_DEPTH_121212:
217 			bpp = 12;
218 			break;
219 		case COLOR_DEPTH_141414:
220 			bpp = 14;
221 			break;
222 		case COLOR_DEPTH_161616:
223 			bpp = 16;
224 			break;
225 		default:
226 			ASSERT(bpp != 0);
227 			break;
228 		}
229 
230 		bpp = bpp * 3;
231 
232 		/* TODO need to know link rate */
233 
234 		pbn = drm_dp_calc_pbn_mode(clock, bpp);
235 
236 		slots = drm_dp_find_vcpi_slots(mst_mgr, pbn);
237 		ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port, pbn, slots);
238 
239 		if (!ret)
240 			return false;
241 
242 	} else {
243 		drm_dp_mst_reset_vcpi_slots(mst_mgr, mst_port);
244 	}
245 
246 	ret = drm_dp_update_payload_part1(mst_mgr);
247 
248 	/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or
249 	 * AUX message. The sequence is slot 1-63 allocated sequence for each
250 	 * stream. AMD ASIC stream slot allocation should follow the same
251 	 * sequence. copy DRM MST allocation to dc */
252 
253 	get_payload_table(aconnector, proposed_table);
254 
255 	if (ret)
256 		return false;
257 
258 	return true;
259 }
260 
261 /*
262  * Polls for ACT (allocation change trigger) handled and sends
263  * ALLOCATE_PAYLOAD message.
264  */
265 bool dm_helpers_dp_mst_poll_for_allocation_change_trigger(
266 		struct dc_context *ctx,
267 		const struct dc_stream_state *stream)
268 {
269 	struct amdgpu_dm_connector *aconnector;
270 	struct drm_dp_mst_topology_mgr *mst_mgr;
271 	int ret;
272 
273 	aconnector = stream->sink->priv;
274 
275 	if (!aconnector || !aconnector->mst_port)
276 		return false;
277 
278 	mst_mgr = &aconnector->mst_port->mst_mgr;
279 
280 	if (!mst_mgr->mst_state)
281 		return false;
282 
283 	ret = drm_dp_check_act_status(mst_mgr);
284 
285 	if (ret)
286 		return false;
287 
288 	return true;
289 }
290 
291 bool dm_helpers_dp_mst_send_payload_allocation(
292 		struct dc_context *ctx,
293 		const struct dc_stream_state *stream,
294 		bool enable)
295 {
296 	struct amdgpu_dm_connector *aconnector;
297 	struct drm_dp_mst_topology_mgr *mst_mgr;
298 	struct drm_dp_mst_port *mst_port;
299 	int ret;
300 
301 	aconnector = stream->sink->priv;
302 
303 	if (!aconnector || !aconnector->mst_port)
304 		return false;
305 
306 	mst_port = aconnector->port;
307 
308 	mst_mgr = &aconnector->mst_port->mst_mgr;
309 
310 	if (!mst_mgr->mst_state)
311 		return false;
312 
313 	ret = drm_dp_update_payload_part2(mst_mgr);
314 
315 	if (ret)
316 		return false;
317 
318 	if (!enable)
319 		drm_dp_mst_deallocate_vcpi(mst_mgr, mst_port);
320 
321 	return true;
322 }
323 
324 bool dm_helpers_dc_conn_log(struct dc_context *ctx, struct log_entry *entry, enum dc_log_type event)
325 {
326 	return true;
327 }
328 
329 void dm_dtn_log_begin(struct dc_context *ctx)
330 {}
331 
332 void dm_dtn_log_append_v(struct dc_context *ctx,
333 		const char *pMsg, ...)
334 {}
335 
336 void dm_dtn_log_end(struct dc_context *ctx)
337 {}
338 
339 bool dm_helpers_dp_mst_start_top_mgr(
340 		struct dc_context *ctx,
341 		const struct dc_link *link,
342 		bool boot)
343 {
344 	struct amdgpu_dm_connector *aconnector = link->priv;
345 
346 	if (!aconnector) {
347 			DRM_ERROR("Failed to found connector for link!");
348 			return false;
349 	}
350 
351 	if (boot) {
352 		DRM_INFO("DM_MST: Differing MST start on aconnector: %p [id: %d]\n",
353 					aconnector, aconnector->base.base.id);
354 		return true;
355 	}
356 
357 	DRM_INFO("DM_MST: starting TM on aconnector: %p [id: %d]\n",
358 			aconnector, aconnector->base.base.id);
359 
360 	return (drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true) == 0);
361 }
362 
363 void dm_helpers_dp_mst_stop_top_mgr(
364 		struct dc_context *ctx,
365 		const struct dc_link *link)
366 {
367 	struct amdgpu_dm_connector *aconnector = link->priv;
368 
369 	if (!aconnector) {
370 			DRM_ERROR("Failed to found connector for link!");
371 			return;
372 	}
373 
374 	DRM_INFO("DM_MST: stopping TM on aconnector: %p [id: %d]\n",
375 			aconnector, aconnector->base.base.id);
376 
377 	if (aconnector->mst_mgr.mst_state == true)
378 		drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, false);
379 }
380 
381 bool dm_helpers_dp_read_dpcd(
382 		struct dc_context *ctx,
383 		const struct dc_link *link,
384 		uint32_t address,
385 		uint8_t *data,
386 		uint32_t size)
387 {
388 
389 	struct amdgpu_dm_connector *aconnector = link->priv;
390 
391 	if (!aconnector) {
392 		DRM_ERROR("Failed to found connector for link!");
393 		return false;
394 	}
395 
396 	return drm_dp_dpcd_read(&aconnector->dm_dp_aux.aux, address,
397 			data, size) > 0;
398 }
399 
400 bool dm_helpers_dp_write_dpcd(
401 		struct dc_context *ctx,
402 		const struct dc_link *link,
403 		uint32_t address,
404 		const uint8_t *data,
405 		uint32_t size)
406 {
407 	struct amdgpu_dm_connector *aconnector = link->priv;
408 
409 	if (!aconnector) {
410 		DRM_ERROR("Failed to found connector for link!");
411 		return false;
412 	}
413 
414 	return drm_dp_dpcd_write(&aconnector->dm_dp_aux.aux,
415 			address, (uint8_t *)data, size) > 0;
416 }
417 
418 bool dm_helpers_submit_i2c(
419 		struct dc_context *ctx,
420 		const struct dc_link *link,
421 		struct i2c_command *cmd)
422 {
423 	struct amdgpu_dm_connector *aconnector = link->priv;
424 	struct i2c_msg *msgs;
425 	int i = 0;
426 	int num = cmd->number_of_payloads;
427 	bool result;
428 
429 	if (!aconnector) {
430 		DRM_ERROR("Failed to found connector for link!");
431 		return false;
432 	}
433 
434 	msgs = kzalloc(num * sizeof(struct i2c_msg), GFP_KERNEL);
435 
436 	if (!msgs)
437 		return false;
438 
439 	for (i = 0; i < num; i++) {
440 		msgs[i].flags = cmd->payloads[i].write ? 0 : I2C_M_RD;
441 		msgs[i].addr = cmd->payloads[i].address;
442 		msgs[i].len = cmd->payloads[i].length;
443 		msgs[i].buf = cmd->payloads[i].data;
444 	}
445 
446 	result = i2c_transfer(&aconnector->i2c->base, msgs, num) == num;
447 
448 	kfree(msgs);
449 
450 	return result;
451 }
452 
453 enum dc_edid_status dm_helpers_read_local_edid(
454 		struct dc_context *ctx,
455 		struct dc_link *link,
456 		struct dc_sink *sink)
457 {
458 	struct amdgpu_dm_connector *aconnector = link->priv;
459 	struct i2c_adapter *ddc;
460 	int retry = 3;
461 	enum dc_edid_status edid_status;
462 	struct edid *edid;
463 
464 	if (link->aux_mode)
465 		ddc = &aconnector->dm_dp_aux.aux.ddc;
466 	else
467 		ddc = &aconnector->i2c->base;
468 
469 	/* some dongles read edid incorrectly the first time,
470 	 * do check sum and retry to make sure read correct edid.
471 	 */
472 	do {
473 
474 		edid = drm_get_edid(&aconnector->base, ddc);
475 
476 		if (!edid)
477 			return EDID_NO_RESPONSE;
478 
479 		sink->dc_edid.length = EDID_LENGTH * (edid->extensions + 1);
480 		memmove(sink->dc_edid.raw_edid, (uint8_t *)edid, sink->dc_edid.length);
481 
482 		/* We don't need the original edid anymore */
483 		kfree(edid);
484 
485 		edid_status = dm_helpers_parse_edid_caps(
486 						ctx,
487 						&sink->dc_edid,
488 						&sink->edid_caps);
489 
490 	} while (edid_status == EDID_BAD_CHECKSUM && --retry > 0);
491 
492 	if (edid_status != EDID_OK)
493 		DRM_ERROR("EDID err: %d, on connector: %s",
494 				edid_status,
495 				aconnector->base.name);
496 
497 	return edid_status;
498 }
499