1 /*
2  * Copyright © 2014 Intel Corporation
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 (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  */
23 
24 #include <linux/component.h>
25 #include <linux/kernel.h>
26 
27 #include <drm/drm_edid.h>
28 #include <drm/i915_component.h>
29 
30 #include "i915_drv.h"
31 #include "intel_atomic.h"
32 #include "intel_audio.h"
33 #include "intel_audio_regs.h"
34 #include "intel_cdclk.h"
35 #include "intel_crtc.h"
36 #include "intel_de.h"
37 #include "intel_display_types.h"
38 #include "intel_lpe_audio.h"
39 
40 /**
41  * DOC: High Definition Audio over HDMI and Display Port
42  *
43  * The graphics and audio drivers together support High Definition Audio over
44  * HDMI and Display Port. The audio programming sequences are divided into audio
45  * codec and controller enable and disable sequences. The graphics driver
46  * handles the audio codec sequences, while the audio driver handles the audio
47  * controller sequences.
48  *
49  * The disable sequences must be performed before disabling the transcoder or
50  * port. The enable sequences may only be performed after enabling the
51  * transcoder and port, and after completed link training. Therefore the audio
52  * enable/disable sequences are part of the modeset sequence.
53  *
54  * The codec and controller sequences could be done either parallel or serial,
55  * but generally the ELDV/PD change in the codec sequence indicates to the audio
56  * driver that the controller sequence should start. Indeed, most of the
57  * co-operation between the graphics and audio drivers is handled via audio
58  * related registers. (The notable exception is the power management, not
59  * covered here.)
60  *
61  * The struct &i915_audio_component is used to interact between the graphics
62  * and audio drivers. The struct &i915_audio_component_ops @ops in it is
63  * defined in graphics driver and called in audio driver. The
64  * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
65  */
66 
67 struct intel_audio_funcs {
68 	void (*audio_codec_enable)(struct intel_encoder *encoder,
69 				   const struct intel_crtc_state *crtc_state,
70 				   const struct drm_connector_state *conn_state);
71 	void (*audio_codec_disable)(struct intel_encoder *encoder,
72 				    const struct intel_crtc_state *old_crtc_state,
73 				    const struct drm_connector_state *old_conn_state);
74 };
75 
76 /* DP N/M table */
77 #define LC_810M	810000
78 #define LC_540M	540000
79 #define LC_270M	270000
80 #define LC_162M	162000
81 
82 struct dp_aud_n_m {
83 	int sample_rate;
84 	int clock;
85 	u16 m;
86 	u16 n;
87 };
88 
89 struct hdmi_aud_ncts {
90 	int sample_rate;
91 	int clock;
92 	int n;
93 	int cts;
94 };
95 
96 /* Values according to DP 1.4 Table 2-104 */
97 static const struct dp_aud_n_m dp_aud_n_m[] = {
98 	{ 32000, LC_162M, 1024, 10125 },
99 	{ 44100, LC_162M, 784, 5625 },
100 	{ 48000, LC_162M, 512, 3375 },
101 	{ 64000, LC_162M, 2048, 10125 },
102 	{ 88200, LC_162M, 1568, 5625 },
103 	{ 96000, LC_162M, 1024, 3375 },
104 	{ 128000, LC_162M, 4096, 10125 },
105 	{ 176400, LC_162M, 3136, 5625 },
106 	{ 192000, LC_162M, 2048, 3375 },
107 	{ 32000, LC_270M, 1024, 16875 },
108 	{ 44100, LC_270M, 784, 9375 },
109 	{ 48000, LC_270M, 512, 5625 },
110 	{ 64000, LC_270M, 2048, 16875 },
111 	{ 88200, LC_270M, 1568, 9375 },
112 	{ 96000, LC_270M, 1024, 5625 },
113 	{ 128000, LC_270M, 4096, 16875 },
114 	{ 176400, LC_270M, 3136, 9375 },
115 	{ 192000, LC_270M, 2048, 5625 },
116 	{ 32000, LC_540M, 1024, 33750 },
117 	{ 44100, LC_540M, 784, 18750 },
118 	{ 48000, LC_540M, 512, 11250 },
119 	{ 64000, LC_540M, 2048, 33750 },
120 	{ 88200, LC_540M, 1568, 18750 },
121 	{ 96000, LC_540M, 1024, 11250 },
122 	{ 128000, LC_540M, 4096, 33750 },
123 	{ 176400, LC_540M, 3136, 18750 },
124 	{ 192000, LC_540M, 2048, 11250 },
125 	{ 32000, LC_810M, 1024, 50625 },
126 	{ 44100, LC_810M, 784, 28125 },
127 	{ 48000, LC_810M, 512, 16875 },
128 	{ 64000, LC_810M, 2048, 50625 },
129 	{ 88200, LC_810M, 1568, 28125 },
130 	{ 96000, LC_810M, 1024, 16875 },
131 	{ 128000, LC_810M, 4096, 50625 },
132 	{ 176400, LC_810M, 3136, 28125 },
133 	{ 192000, LC_810M, 2048, 16875 },
134 };
135 
136 static const struct dp_aud_n_m *
audio_config_dp_get_n_m(const struct intel_crtc_state * crtc_state,int rate)137 audio_config_dp_get_n_m(const struct intel_crtc_state *crtc_state, int rate)
138 {
139 	int i;
140 
141 	for (i = 0; i < ARRAY_SIZE(dp_aud_n_m); i++) {
142 		if (rate == dp_aud_n_m[i].sample_rate &&
143 		    crtc_state->port_clock == dp_aud_n_m[i].clock)
144 			return &dp_aud_n_m[i];
145 	}
146 
147 	return NULL;
148 }
149 
150 static const struct {
151 	int clock;
152 	u32 config;
153 } hdmi_audio_clock[] = {
154 	{ 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
155 	{ 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
156 	{ 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
157 	{ 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
158 	{ 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
159 	{ 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
160 	{ 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
161 	{ 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
162 	{ 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
163 	{ 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
164 	{ 296703, AUD_CONFIG_PIXEL_CLOCK_HDMI_296703 },
165 	{ 297000, AUD_CONFIG_PIXEL_CLOCK_HDMI_297000 },
166 	{ 593407, AUD_CONFIG_PIXEL_CLOCK_HDMI_593407 },
167 	{ 594000, AUD_CONFIG_PIXEL_CLOCK_HDMI_594000 },
168 };
169 
170 /* HDMI N/CTS table */
171 #define TMDS_297M 297000
172 #define TMDS_296M 296703
173 #define TMDS_594M 594000
174 #define TMDS_593M 593407
175 
176 static const struct hdmi_aud_ncts hdmi_aud_ncts_24bpp[] = {
177 	{ 32000, TMDS_296M, 5824, 421875 },
178 	{ 32000, TMDS_297M, 3072, 222750 },
179 	{ 32000, TMDS_593M, 5824, 843750 },
180 	{ 32000, TMDS_594M, 3072, 445500 },
181 	{ 44100, TMDS_296M, 4459, 234375 },
182 	{ 44100, TMDS_297M, 4704, 247500 },
183 	{ 44100, TMDS_593M, 8918, 937500 },
184 	{ 44100, TMDS_594M, 9408, 990000 },
185 	{ 88200, TMDS_296M, 8918, 234375 },
186 	{ 88200, TMDS_297M, 9408, 247500 },
187 	{ 88200, TMDS_593M, 17836, 937500 },
188 	{ 88200, TMDS_594M, 18816, 990000 },
189 	{ 176400, TMDS_296M, 17836, 234375 },
190 	{ 176400, TMDS_297M, 18816, 247500 },
191 	{ 176400, TMDS_593M, 35672, 937500 },
192 	{ 176400, TMDS_594M, 37632, 990000 },
193 	{ 48000, TMDS_296M, 5824, 281250 },
194 	{ 48000, TMDS_297M, 5120, 247500 },
195 	{ 48000, TMDS_593M, 5824, 562500 },
196 	{ 48000, TMDS_594M, 6144, 594000 },
197 	{ 96000, TMDS_296M, 11648, 281250 },
198 	{ 96000, TMDS_297M, 10240, 247500 },
199 	{ 96000, TMDS_593M, 11648, 562500 },
200 	{ 96000, TMDS_594M, 12288, 594000 },
201 	{ 192000, TMDS_296M, 23296, 281250 },
202 	{ 192000, TMDS_297M, 20480, 247500 },
203 	{ 192000, TMDS_593M, 23296, 562500 },
204 	{ 192000, TMDS_594M, 24576, 594000 },
205 };
206 
207 /* Appendix C - N & CTS values for deep color from HDMI 2.0 spec*/
208 /* HDMI N/CTS table for 10 bit deep color(30 bpp)*/
209 #define TMDS_371M 371250
210 #define TMDS_370M 370878
211 
212 static const struct hdmi_aud_ncts hdmi_aud_ncts_30bpp[] = {
213 	{ 32000, TMDS_370M, 5824, 527344 },
214 	{ 32000, TMDS_371M, 6144, 556875 },
215 	{ 44100, TMDS_370M, 8918, 585938 },
216 	{ 44100, TMDS_371M, 4704, 309375 },
217 	{ 88200, TMDS_370M, 17836, 585938 },
218 	{ 88200, TMDS_371M, 9408, 309375 },
219 	{ 176400, TMDS_370M, 35672, 585938 },
220 	{ 176400, TMDS_371M, 18816, 309375 },
221 	{ 48000, TMDS_370M, 11648, 703125 },
222 	{ 48000, TMDS_371M, 5120, 309375 },
223 	{ 96000, TMDS_370M, 23296, 703125 },
224 	{ 96000, TMDS_371M, 10240, 309375 },
225 	{ 192000, TMDS_370M, 46592, 703125 },
226 	{ 192000, TMDS_371M, 20480, 309375 },
227 };
228 
229 /* HDMI N/CTS table for 12 bit deep color(36 bpp)*/
230 #define TMDS_445_5M 445500
231 #define TMDS_445M 445054
232 
233 static const struct hdmi_aud_ncts hdmi_aud_ncts_36bpp[] = {
234 	{ 32000, TMDS_445M, 5824, 632813 },
235 	{ 32000, TMDS_445_5M, 4096, 445500 },
236 	{ 44100, TMDS_445M, 8918, 703125 },
237 	{ 44100, TMDS_445_5M, 4704, 371250 },
238 	{ 88200, TMDS_445M, 17836, 703125 },
239 	{ 88200, TMDS_445_5M, 9408, 371250 },
240 	{ 176400, TMDS_445M, 35672, 703125 },
241 	{ 176400, TMDS_445_5M, 18816, 371250 },
242 	{ 48000, TMDS_445M, 5824, 421875 },
243 	{ 48000, TMDS_445_5M, 5120, 371250 },
244 	{ 96000, TMDS_445M, 11648, 421875 },
245 	{ 96000, TMDS_445_5M, 10240, 371250 },
246 	{ 192000, TMDS_445M, 23296, 421875 },
247 	{ 192000, TMDS_445_5M, 20480, 371250 },
248 };
249 
250 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
audio_config_hdmi_pixel_clock(const struct intel_crtc_state * crtc_state)251 static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_state)
252 {
253 	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
254 	const struct drm_display_mode *adjusted_mode =
255 		&crtc_state->hw.adjusted_mode;
256 	int i;
257 
258 	for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
259 		if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock)
260 			break;
261 	}
262 
263 	if (DISPLAY_VER(dev_priv) < 12 && adjusted_mode->crtc_clock > 148500)
264 		i = ARRAY_SIZE(hdmi_audio_clock);
265 
266 	if (i == ARRAY_SIZE(hdmi_audio_clock)) {
267 		drm_dbg_kms(&dev_priv->drm,
268 			    "HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
269 			    adjusted_mode->crtc_clock);
270 		i = 1;
271 	}
272 
273 	drm_dbg_kms(&dev_priv->drm,
274 		    "Configuring HDMI audio for pixel clock %d (0x%08x)\n",
275 		    hdmi_audio_clock[i].clock,
276 		    hdmi_audio_clock[i].config);
277 
278 	return hdmi_audio_clock[i].config;
279 }
280 
audio_config_hdmi_get_n(const struct intel_crtc_state * crtc_state,int rate)281 static int audio_config_hdmi_get_n(const struct intel_crtc_state *crtc_state,
282 				   int rate)
283 {
284 	const struct hdmi_aud_ncts *hdmi_ncts_table;
285 	int i, size;
286 
287 	if (crtc_state->pipe_bpp == 36) {
288 		hdmi_ncts_table = hdmi_aud_ncts_36bpp;
289 		size = ARRAY_SIZE(hdmi_aud_ncts_36bpp);
290 	} else if (crtc_state->pipe_bpp == 30) {
291 		hdmi_ncts_table = hdmi_aud_ncts_30bpp;
292 		size = ARRAY_SIZE(hdmi_aud_ncts_30bpp);
293 	} else {
294 		hdmi_ncts_table = hdmi_aud_ncts_24bpp;
295 		size = ARRAY_SIZE(hdmi_aud_ncts_24bpp);
296 	}
297 
298 	for (i = 0; i < size; i++) {
299 		if (rate == hdmi_ncts_table[i].sample_rate &&
300 		    crtc_state->port_clock == hdmi_ncts_table[i].clock) {
301 			return hdmi_ncts_table[i].n;
302 		}
303 	}
304 	return 0;
305 }
306 
intel_eld_uptodate(struct drm_connector * connector,i915_reg_t reg_eldv,u32 bits_eldv,i915_reg_t reg_elda,u32 bits_elda,i915_reg_t reg_edid)307 static bool intel_eld_uptodate(struct drm_connector *connector,
308 			       i915_reg_t reg_eldv, u32 bits_eldv,
309 			       i915_reg_t reg_elda, u32 bits_elda,
310 			       i915_reg_t reg_edid)
311 {
312 	struct drm_i915_private *dev_priv = to_i915(connector->dev);
313 	const u8 *eld = connector->eld;
314 	u32 tmp;
315 	int i;
316 
317 	tmp = intel_de_read(dev_priv, reg_eldv);
318 	tmp &= bits_eldv;
319 
320 	if (!tmp)
321 		return false;
322 
323 	tmp = intel_de_read(dev_priv, reg_elda);
324 	tmp &= ~bits_elda;
325 	intel_de_write(dev_priv, reg_elda, tmp);
326 
327 	for (i = 0; i < drm_eld_size(eld) / 4; i++)
328 		if (intel_de_read(dev_priv, reg_edid) != *((const u32 *)eld + i))
329 			return false;
330 
331 	return true;
332 }
333 
g4x_audio_codec_disable(struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)334 static void g4x_audio_codec_disable(struct intel_encoder *encoder,
335 				    const struct intel_crtc_state *old_crtc_state,
336 				    const struct drm_connector_state *old_conn_state)
337 {
338 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
339 	u32 eldv, tmp;
340 
341 	tmp = intel_de_read(dev_priv, G4X_AUD_VID_DID);
342 	if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
343 		eldv = G4X_ELDV_DEVCL_DEVBLC;
344 	else
345 		eldv = G4X_ELDV_DEVCTG;
346 
347 	/* Invalidate ELD */
348 	tmp = intel_de_read(dev_priv, G4X_AUD_CNTL_ST);
349 	tmp &= ~eldv;
350 	intel_de_write(dev_priv, G4X_AUD_CNTL_ST, tmp);
351 }
352 
g4x_audio_codec_enable(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state,const struct drm_connector_state * conn_state)353 static void g4x_audio_codec_enable(struct intel_encoder *encoder,
354 				   const struct intel_crtc_state *crtc_state,
355 				   const struct drm_connector_state *conn_state)
356 {
357 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
358 	struct drm_connector *connector = conn_state->connector;
359 	const u8 *eld = connector->eld;
360 	u32 eldv;
361 	u32 tmp;
362 	int len, i;
363 
364 	tmp = intel_de_read(dev_priv, G4X_AUD_VID_DID);
365 	if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
366 		eldv = G4X_ELDV_DEVCL_DEVBLC;
367 	else
368 		eldv = G4X_ELDV_DEVCTG;
369 
370 	if (intel_eld_uptodate(connector,
371 			       G4X_AUD_CNTL_ST, eldv,
372 			       G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK,
373 			       G4X_HDMIW_HDMIEDID))
374 		return;
375 
376 	tmp = intel_de_read(dev_priv, G4X_AUD_CNTL_ST);
377 	tmp &= ~(eldv | G4X_ELD_ADDR_MASK);
378 	len = (tmp >> 9) & 0x1f;		/* ELD buffer size */
379 	intel_de_write(dev_priv, G4X_AUD_CNTL_ST, tmp);
380 
381 	len = min(drm_eld_size(eld) / 4, len);
382 	for (i = 0; i < len; i++)
383 		intel_de_write(dev_priv, G4X_HDMIW_HDMIEDID,
384 			       *((const u32 *)eld + i));
385 
386 	tmp = intel_de_read(dev_priv, G4X_AUD_CNTL_ST);
387 	tmp |= eldv;
388 	intel_de_write(dev_priv, G4X_AUD_CNTL_ST, tmp);
389 }
390 
391 static void
hsw_dp_audio_config_update(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state)392 hsw_dp_audio_config_update(struct intel_encoder *encoder,
393 			   const struct intel_crtc_state *crtc_state)
394 {
395 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
396 	struct i915_audio_component *acomp = dev_priv->display.audio.component;
397 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
398 	enum port port = encoder->port;
399 	const struct dp_aud_n_m *nm;
400 	int rate;
401 	u32 tmp;
402 
403 	rate = acomp ? acomp->aud_sample_rate[port] : 0;
404 	nm = audio_config_dp_get_n_m(crtc_state, rate);
405 	if (nm)
406 		drm_dbg_kms(&dev_priv->drm, "using Maud %u, Naud %u\n", nm->m,
407 			    nm->n);
408 	else
409 		drm_dbg_kms(&dev_priv->drm, "using automatic Maud, Naud\n");
410 
411 	tmp = intel_de_read(dev_priv, HSW_AUD_CFG(cpu_transcoder));
412 	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
413 	tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
414 	tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
415 	tmp |= AUD_CONFIG_N_VALUE_INDEX;
416 
417 	if (nm) {
418 		tmp &= ~AUD_CONFIG_N_MASK;
419 		tmp |= AUD_CONFIG_N(nm->n);
420 		tmp |= AUD_CONFIG_N_PROG_ENABLE;
421 	}
422 
423 	intel_de_write(dev_priv, HSW_AUD_CFG(cpu_transcoder), tmp);
424 
425 	tmp = intel_de_read(dev_priv, HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
426 	tmp &= ~AUD_CONFIG_M_MASK;
427 	tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
428 	tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
429 
430 	if (nm) {
431 		tmp |= nm->m;
432 		tmp |= AUD_M_CTS_M_VALUE_INDEX;
433 		tmp |= AUD_M_CTS_M_PROG_ENABLE;
434 	}
435 
436 	intel_de_write(dev_priv, HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
437 }
438 
439 static void
hsw_hdmi_audio_config_update(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state)440 hsw_hdmi_audio_config_update(struct intel_encoder *encoder,
441 			     const struct intel_crtc_state *crtc_state)
442 {
443 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
444 	struct i915_audio_component *acomp = dev_priv->display.audio.component;
445 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
446 	enum port port = encoder->port;
447 	int n, rate;
448 	u32 tmp;
449 
450 	rate = acomp ? acomp->aud_sample_rate[port] : 0;
451 
452 	tmp = intel_de_read(dev_priv, HSW_AUD_CFG(cpu_transcoder));
453 	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
454 	tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
455 	tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
456 	tmp |= audio_config_hdmi_pixel_clock(crtc_state);
457 
458 	n = audio_config_hdmi_get_n(crtc_state, rate);
459 	if (n != 0) {
460 		drm_dbg_kms(&dev_priv->drm, "using N %d\n", n);
461 
462 		tmp &= ~AUD_CONFIG_N_MASK;
463 		tmp |= AUD_CONFIG_N(n);
464 		tmp |= AUD_CONFIG_N_PROG_ENABLE;
465 	} else {
466 		drm_dbg_kms(&dev_priv->drm, "using automatic N\n");
467 	}
468 
469 	intel_de_write(dev_priv, HSW_AUD_CFG(cpu_transcoder), tmp);
470 
471 	/*
472 	 * Let's disable "Enable CTS or M Prog bit"
473 	 * and let HW calculate the value
474 	 */
475 	tmp = intel_de_read(dev_priv, HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
476 	tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
477 	tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
478 	intel_de_write(dev_priv, HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
479 }
480 
481 static void
hsw_audio_config_update(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state)482 hsw_audio_config_update(struct intel_encoder *encoder,
483 			const struct intel_crtc_state *crtc_state)
484 {
485 	if (intel_crtc_has_dp_encoder(crtc_state))
486 		hsw_dp_audio_config_update(encoder, crtc_state);
487 	else
488 		hsw_hdmi_audio_config_update(encoder, crtc_state);
489 }
490 
hsw_audio_codec_disable(struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)491 static void hsw_audio_codec_disable(struct intel_encoder *encoder,
492 				    const struct intel_crtc_state *old_crtc_state,
493 				    const struct drm_connector_state *old_conn_state)
494 {
495 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
496 	enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
497 	u32 tmp;
498 
499 	mutex_lock(&dev_priv->display.audio.mutex);
500 
501 	/* Disable timestamps */
502 	tmp = intel_de_read(dev_priv, HSW_AUD_CFG(cpu_transcoder));
503 	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
504 	tmp |= AUD_CONFIG_N_PROG_ENABLE;
505 	tmp &= ~AUD_CONFIG_UPPER_N_MASK;
506 	tmp &= ~AUD_CONFIG_LOWER_N_MASK;
507 	if (intel_crtc_has_dp_encoder(old_crtc_state))
508 		tmp |= AUD_CONFIG_N_VALUE_INDEX;
509 	intel_de_write(dev_priv, HSW_AUD_CFG(cpu_transcoder), tmp);
510 
511 	/* Invalidate ELD */
512 	tmp = intel_de_read(dev_priv, HSW_AUD_PIN_ELD_CP_VLD);
513 	tmp &= ~AUDIO_ELD_VALID(cpu_transcoder);
514 	tmp &= ~AUDIO_OUTPUT_ENABLE(cpu_transcoder);
515 	intel_de_write(dev_priv, HSW_AUD_PIN_ELD_CP_VLD, tmp);
516 
517 	mutex_unlock(&dev_priv->display.audio.mutex);
518 }
519 
calc_hblank_early_prog(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state)520 static unsigned int calc_hblank_early_prog(struct intel_encoder *encoder,
521 					   const struct intel_crtc_state *crtc_state)
522 {
523 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
524 	unsigned int link_clks_available, link_clks_required;
525 	unsigned int tu_data, tu_line, link_clks_active;
526 	unsigned int h_active, h_total, hblank_delta, pixel_clk;
527 	unsigned int fec_coeff, cdclk, vdsc_bpp;
528 	unsigned int link_clk, lanes;
529 	unsigned int hblank_rise;
530 
531 	h_active = crtc_state->hw.adjusted_mode.crtc_hdisplay;
532 	h_total = crtc_state->hw.adjusted_mode.crtc_htotal;
533 	pixel_clk = crtc_state->hw.adjusted_mode.crtc_clock;
534 	vdsc_bpp = crtc_state->dsc.compressed_bpp;
535 	cdclk = i915->display.cdclk.hw.cdclk;
536 	/* fec= 0.972261, using rounding multiplier of 1000000 */
537 	fec_coeff = 972261;
538 	link_clk = crtc_state->port_clock;
539 	lanes = crtc_state->lane_count;
540 
541 	drm_dbg_kms(&i915->drm, "h_active = %u link_clk = %u :"
542 		    "lanes = %u vdsc_bpp = %u cdclk = %u\n",
543 		    h_active, link_clk, lanes, vdsc_bpp, cdclk);
544 
545 	if (WARN_ON(!link_clk || !pixel_clk || !lanes || !vdsc_bpp || !cdclk))
546 		return 0;
547 
548 	link_clks_available = (h_total - h_active) * link_clk / pixel_clk - 28;
549 	link_clks_required = DIV_ROUND_UP(192000 * h_total, 1000 * pixel_clk) * (48 / lanes + 2);
550 
551 	if (link_clks_available > link_clks_required)
552 		hblank_delta = 32;
553 	else
554 		hblank_delta = DIV64_U64_ROUND_UP(mul_u32_u32(5 * (link_clk + cdclk), pixel_clk),
555 						  mul_u32_u32(link_clk, cdclk));
556 
557 	tu_data = div64_u64(mul_u32_u32(pixel_clk * vdsc_bpp * 8, 1000000),
558 			    mul_u32_u32(link_clk * lanes, fec_coeff));
559 	tu_line = div64_u64(h_active * mul_u32_u32(link_clk, fec_coeff),
560 			    mul_u32_u32(64 * pixel_clk, 1000000));
561 	link_clks_active  = (tu_line - 1) * 64 + tu_data;
562 
563 	hblank_rise = (link_clks_active + 6 * DIV_ROUND_UP(link_clks_active, 250) + 4) * pixel_clk / link_clk;
564 
565 	return h_active - hblank_rise + hblank_delta;
566 }
567 
calc_samples_room(const struct intel_crtc_state * crtc_state)568 static unsigned int calc_samples_room(const struct intel_crtc_state *crtc_state)
569 {
570 	unsigned int h_active, h_total, pixel_clk;
571 	unsigned int link_clk, lanes;
572 
573 	h_active = crtc_state->hw.adjusted_mode.hdisplay;
574 	h_total = crtc_state->hw.adjusted_mode.htotal;
575 	pixel_clk = crtc_state->hw.adjusted_mode.clock;
576 	link_clk = crtc_state->port_clock;
577 	lanes = crtc_state->lane_count;
578 
579 	return ((h_total - h_active) * link_clk - 12 * pixel_clk) /
580 		(pixel_clk * (48 / lanes + 2));
581 }
582 
enable_audio_dsc_wa(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state)583 static void enable_audio_dsc_wa(struct intel_encoder *encoder,
584 				const struct intel_crtc_state *crtc_state)
585 {
586 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
587 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
588 	enum pipe pipe = crtc->pipe;
589 	unsigned int hblank_early_prog, samples_room;
590 	unsigned int val;
591 
592 	if (DISPLAY_VER(i915) < 11)
593 		return;
594 
595 	val = intel_de_read(i915, AUD_CONFIG_BE);
596 
597 	if (DISPLAY_VER(i915) == 11)
598 		val |= HBLANK_EARLY_ENABLE_ICL(pipe);
599 	else if (DISPLAY_VER(i915) >= 12)
600 		val |= HBLANK_EARLY_ENABLE_TGL(pipe);
601 
602 	if (crtc_state->dsc.compression_enable &&
603 	    crtc_state->hw.adjusted_mode.hdisplay >= 3840 &&
604 	    crtc_state->hw.adjusted_mode.vdisplay >= 2160) {
605 		/* Get hblank early enable value required */
606 		val &= ~HBLANK_START_COUNT_MASK(pipe);
607 		hblank_early_prog = calc_hblank_early_prog(encoder, crtc_state);
608 		if (hblank_early_prog < 32)
609 			val |= HBLANK_START_COUNT(pipe, HBLANK_START_COUNT_32);
610 		else if (hblank_early_prog < 64)
611 			val |= HBLANK_START_COUNT(pipe, HBLANK_START_COUNT_64);
612 		else if (hblank_early_prog < 96)
613 			val |= HBLANK_START_COUNT(pipe, HBLANK_START_COUNT_96);
614 		else
615 			val |= HBLANK_START_COUNT(pipe, HBLANK_START_COUNT_128);
616 
617 		/* Get samples room value required */
618 		val &= ~NUMBER_SAMPLES_PER_LINE_MASK(pipe);
619 		samples_room = calc_samples_room(crtc_state);
620 		if (samples_room < 3)
621 			val |= NUMBER_SAMPLES_PER_LINE(pipe, samples_room);
622 		else /* Program 0 i.e "All Samples available in buffer" */
623 			val |= NUMBER_SAMPLES_PER_LINE(pipe, 0x0);
624 	}
625 
626 	intel_de_write(i915, AUD_CONFIG_BE, val);
627 }
628 
629 #undef ROUNDING_FACTOR
630 
hsw_audio_codec_enable(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state,const struct drm_connector_state * conn_state)631 static void hsw_audio_codec_enable(struct intel_encoder *encoder,
632 				   const struct intel_crtc_state *crtc_state,
633 				   const struct drm_connector_state *conn_state)
634 {
635 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
636 	struct drm_connector *connector = conn_state->connector;
637 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
638 	const u8 *eld = connector->eld;
639 	u32 tmp;
640 	int len, i;
641 
642 	mutex_lock(&dev_priv->display.audio.mutex);
643 
644 	/* Enable Audio WA for 4k DSC usecases */
645 	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP))
646 		enable_audio_dsc_wa(encoder, crtc_state);
647 
648 	/* Enable audio presence detect, invalidate ELD */
649 	tmp = intel_de_read(dev_priv, HSW_AUD_PIN_ELD_CP_VLD);
650 	tmp |= AUDIO_OUTPUT_ENABLE(cpu_transcoder);
651 	tmp &= ~AUDIO_ELD_VALID(cpu_transcoder);
652 	intel_de_write(dev_priv, HSW_AUD_PIN_ELD_CP_VLD, tmp);
653 
654 	/*
655 	 * FIXME: We're supposed to wait for vblank here, but we have vblanks
656 	 * disabled during the mode set. The proper fix would be to push the
657 	 * rest of the setup into a vblank work item, queued here, but the
658 	 * infrastructure is not there yet.
659 	 */
660 
661 	/* Reset ELD write address */
662 	tmp = intel_de_read(dev_priv, HSW_AUD_DIP_ELD_CTRL(cpu_transcoder));
663 	tmp &= ~IBX_ELD_ADDRESS_MASK;
664 	intel_de_write(dev_priv, HSW_AUD_DIP_ELD_CTRL(cpu_transcoder), tmp);
665 
666 	/* Up to 84 bytes of hw ELD buffer */
667 	len = min(drm_eld_size(eld), 84);
668 	for (i = 0; i < len / 4; i++)
669 		intel_de_write(dev_priv, HSW_AUD_EDID_DATA(cpu_transcoder),
670 			       *((const u32 *)eld + i));
671 
672 	/* ELD valid */
673 	tmp = intel_de_read(dev_priv, HSW_AUD_PIN_ELD_CP_VLD);
674 	tmp |= AUDIO_ELD_VALID(cpu_transcoder);
675 	intel_de_write(dev_priv, HSW_AUD_PIN_ELD_CP_VLD, tmp);
676 
677 	/* Enable timestamps */
678 	hsw_audio_config_update(encoder, crtc_state);
679 
680 	mutex_unlock(&dev_priv->display.audio.mutex);
681 }
682 
ilk_audio_codec_disable(struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)683 static void ilk_audio_codec_disable(struct intel_encoder *encoder,
684 				    const struct intel_crtc_state *old_crtc_state,
685 				    const struct drm_connector_state *old_conn_state)
686 {
687 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
688 	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
689 	enum pipe pipe = crtc->pipe;
690 	enum port port = encoder->port;
691 	u32 tmp, eldv;
692 	i915_reg_t aud_config, aud_cntrl_st2;
693 
694 	if (drm_WARN_ON(&dev_priv->drm, port == PORT_A))
695 		return;
696 
697 	if (HAS_PCH_IBX(dev_priv)) {
698 		aud_config = IBX_AUD_CFG(pipe);
699 		aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
700 	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
701 		aud_config = VLV_AUD_CFG(pipe);
702 		aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
703 	} else {
704 		aud_config = CPT_AUD_CFG(pipe);
705 		aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
706 	}
707 
708 	/* Disable timestamps */
709 	tmp = intel_de_read(dev_priv, aud_config);
710 	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
711 	tmp |= AUD_CONFIG_N_PROG_ENABLE;
712 	tmp &= ~AUD_CONFIG_UPPER_N_MASK;
713 	tmp &= ~AUD_CONFIG_LOWER_N_MASK;
714 	if (intel_crtc_has_dp_encoder(old_crtc_state))
715 		tmp |= AUD_CONFIG_N_VALUE_INDEX;
716 	intel_de_write(dev_priv, aud_config, tmp);
717 
718 	eldv = IBX_ELD_VALID(port);
719 
720 	/* Invalidate ELD */
721 	tmp = intel_de_read(dev_priv, aud_cntrl_st2);
722 	tmp &= ~eldv;
723 	intel_de_write(dev_priv, aud_cntrl_st2, tmp);
724 }
725 
ilk_audio_codec_enable(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state,const struct drm_connector_state * conn_state)726 static void ilk_audio_codec_enable(struct intel_encoder *encoder,
727 				   const struct intel_crtc_state *crtc_state,
728 				   const struct drm_connector_state *conn_state)
729 {
730 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
731 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
732 	struct drm_connector *connector = conn_state->connector;
733 	enum pipe pipe = crtc->pipe;
734 	enum port port = encoder->port;
735 	const u8 *eld = connector->eld;
736 	u32 tmp, eldv;
737 	int len, i;
738 	i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
739 
740 	if (drm_WARN_ON(&dev_priv->drm, port == PORT_A))
741 		return;
742 
743 	/*
744 	 * FIXME: We're supposed to wait for vblank here, but we have vblanks
745 	 * disabled during the mode set. The proper fix would be to push the
746 	 * rest of the setup into a vblank work item, queued here, but the
747 	 * infrastructure is not there yet.
748 	 */
749 
750 	if (HAS_PCH_IBX(dev_priv)) {
751 		hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
752 		aud_config = IBX_AUD_CFG(pipe);
753 		aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
754 		aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
755 	} else if (IS_VALLEYVIEW(dev_priv) ||
756 		   IS_CHERRYVIEW(dev_priv)) {
757 		hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
758 		aud_config = VLV_AUD_CFG(pipe);
759 		aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
760 		aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
761 	} else {
762 		hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
763 		aud_config = CPT_AUD_CFG(pipe);
764 		aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
765 		aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
766 	}
767 
768 	eldv = IBX_ELD_VALID(port);
769 
770 	/* Invalidate ELD */
771 	tmp = intel_de_read(dev_priv, aud_cntrl_st2);
772 	tmp &= ~eldv;
773 	intel_de_write(dev_priv, aud_cntrl_st2, tmp);
774 
775 	/* Reset ELD write address */
776 	tmp = intel_de_read(dev_priv, aud_cntl_st);
777 	tmp &= ~IBX_ELD_ADDRESS_MASK;
778 	intel_de_write(dev_priv, aud_cntl_st, tmp);
779 
780 	/* Up to 84 bytes of hw ELD buffer */
781 	len = min(drm_eld_size(eld), 84);
782 	for (i = 0; i < len / 4; i++)
783 		intel_de_write(dev_priv, hdmiw_hdmiedid,
784 			       *((const u32 *)eld + i));
785 
786 	/* ELD valid */
787 	tmp = intel_de_read(dev_priv, aud_cntrl_st2);
788 	tmp |= eldv;
789 	intel_de_write(dev_priv, aud_cntrl_st2, tmp);
790 
791 	/* Enable timestamps */
792 	tmp = intel_de_read(dev_priv, aud_config);
793 	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
794 	tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
795 	tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
796 	if (intel_crtc_has_dp_encoder(crtc_state))
797 		tmp |= AUD_CONFIG_N_VALUE_INDEX;
798 	else
799 		tmp |= audio_config_hdmi_pixel_clock(crtc_state);
800 	intel_de_write(dev_priv, aud_config, tmp);
801 }
802 
803 /**
804  * intel_audio_codec_enable - Enable the audio codec for HD audio
805  * @encoder: encoder on which to enable audio
806  * @crtc_state: pointer to the current crtc state.
807  * @conn_state: pointer to the current connector state.
808  *
809  * The enable sequences may only be performed after enabling the transcoder and
810  * port, and after completed link training.
811  */
intel_audio_codec_enable(struct intel_encoder * encoder,const struct intel_crtc_state * crtc_state,const struct drm_connector_state * conn_state)812 void intel_audio_codec_enable(struct intel_encoder *encoder,
813 			      const struct intel_crtc_state *crtc_state,
814 			      const struct drm_connector_state *conn_state)
815 {
816 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
817 	struct i915_audio_component *acomp = dev_priv->display.audio.component;
818 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
819 	struct drm_connector *connector = conn_state->connector;
820 	const struct drm_display_mode *adjusted_mode =
821 		&crtc_state->hw.adjusted_mode;
822 	enum port port = encoder->port;
823 	enum pipe pipe = crtc->pipe;
824 
825 	if (!crtc_state->has_audio)
826 		return;
827 
828 	drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Enable audio codec on pipe %c, %u bytes ELD\n",
829 		    connector->base.id, connector->name,
830 		    encoder->base.base.id, encoder->base.name,
831 		    pipe_name(pipe), drm_eld_size(connector->eld));
832 
833 	/* FIXME precompute the ELD in .compute_config() */
834 	if (!connector->eld[0])
835 		drm_dbg_kms(&dev_priv->drm,
836 			    "Bogus ELD on [CONNECTOR:%d:%s]\n",
837 			    connector->base.id, connector->name);
838 
839 	connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
840 
841 	if (dev_priv->display.funcs.audio)
842 		dev_priv->display.funcs.audio->audio_codec_enable(encoder,
843 								  crtc_state,
844 								  conn_state);
845 
846 	mutex_lock(&dev_priv->display.audio.mutex);
847 	encoder->audio_connector = connector;
848 
849 	/* referred in audio callbacks */
850 	dev_priv->display.audio.encoder_map[pipe] = encoder;
851 	mutex_unlock(&dev_priv->display.audio.mutex);
852 
853 	if (acomp && acomp->base.audio_ops &&
854 	    acomp->base.audio_ops->pin_eld_notify) {
855 		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
856 		if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST))
857 			pipe = -1;
858 		acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
859 						 (int) port, (int) pipe);
860 	}
861 
862 	intel_lpe_audio_notify(dev_priv, pipe, port, connector->eld,
863 			       crtc_state->port_clock,
864 			       intel_crtc_has_dp_encoder(crtc_state));
865 }
866 
867 /**
868  * intel_audio_codec_disable - Disable the audio codec for HD audio
869  * @encoder: encoder on which to disable audio
870  * @old_crtc_state: pointer to the old crtc state.
871  * @old_conn_state: pointer to the old connector state.
872  *
873  * The disable sequences must be performed before disabling the transcoder or
874  * port.
875  */
intel_audio_codec_disable(struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)876 void intel_audio_codec_disable(struct intel_encoder *encoder,
877 			       const struct intel_crtc_state *old_crtc_state,
878 			       const struct drm_connector_state *old_conn_state)
879 {
880 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
881 	struct i915_audio_component *acomp = dev_priv->display.audio.component;
882 	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
883 	struct drm_connector *connector = old_conn_state->connector;
884 	enum port port = encoder->port;
885 	enum pipe pipe = crtc->pipe;
886 
887 	if (!old_crtc_state->has_audio)
888 		return;
889 
890 	drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Disable audio codec on pipe %c\n",
891 		    connector->base.id, connector->name,
892 		    encoder->base.base.id, encoder->base.name, pipe_name(pipe));
893 
894 	if (dev_priv->display.funcs.audio)
895 		dev_priv->display.funcs.audio->audio_codec_disable(encoder,
896 								   old_crtc_state,
897 								   old_conn_state);
898 
899 	mutex_lock(&dev_priv->display.audio.mutex);
900 	encoder->audio_connector = NULL;
901 	dev_priv->display.audio.encoder_map[pipe] = NULL;
902 	mutex_unlock(&dev_priv->display.audio.mutex);
903 
904 	if (acomp && acomp->base.audio_ops &&
905 	    acomp->base.audio_ops->pin_eld_notify) {
906 		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
907 		if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
908 			pipe = -1;
909 		acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
910 						 (int) port, (int) pipe);
911 	}
912 
913 	intel_lpe_audio_notify(dev_priv, pipe, port, NULL, 0, false);
914 }
915 
916 static const struct intel_audio_funcs g4x_audio_funcs = {
917 	.audio_codec_enable = g4x_audio_codec_enable,
918 	.audio_codec_disable = g4x_audio_codec_disable,
919 };
920 
921 static const struct intel_audio_funcs ilk_audio_funcs = {
922 	.audio_codec_enable = ilk_audio_codec_enable,
923 	.audio_codec_disable = ilk_audio_codec_disable,
924 };
925 
926 static const struct intel_audio_funcs hsw_audio_funcs = {
927 	.audio_codec_enable = hsw_audio_codec_enable,
928 	.audio_codec_disable = hsw_audio_codec_disable,
929 };
930 
931 /**
932  * intel_audio_hooks_init - Set up chip specific audio hooks
933  * @dev_priv: device private
934  */
intel_audio_hooks_init(struct drm_i915_private * dev_priv)935 void intel_audio_hooks_init(struct drm_i915_private *dev_priv)
936 {
937 	if (IS_G4X(dev_priv)) {
938 		dev_priv->display.funcs.audio = &g4x_audio_funcs;
939 	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
940 		dev_priv->display.funcs.audio = &ilk_audio_funcs;
941 	} else if (IS_HASWELL(dev_priv) || DISPLAY_VER(dev_priv) >= 8) {
942 		dev_priv->display.funcs.audio = &hsw_audio_funcs;
943 	} else if (HAS_PCH_SPLIT(dev_priv)) {
944 		dev_priv->display.funcs.audio = &ilk_audio_funcs;
945 	}
946 }
947 
948 struct aud_ts_cdclk_m_n {
949 	u8 m;
950 	u16 n;
951 };
952 
intel_audio_cdclk_change_pre(struct drm_i915_private * i915)953 void intel_audio_cdclk_change_pre(struct drm_i915_private *i915)
954 {
955 	if (DISPLAY_VER(i915) >= 13)
956 		intel_de_rmw(i915, AUD_TS_CDCLK_M, AUD_TS_CDCLK_M_EN, 0);
957 }
958 
get_aud_ts_cdclk_m_n(int refclk,int cdclk,struct aud_ts_cdclk_m_n * aud_ts)959 static void get_aud_ts_cdclk_m_n(int refclk, int cdclk, struct aud_ts_cdclk_m_n *aud_ts)
960 {
961 	if (refclk == 24000)
962 		aud_ts->m = 12;
963 	else
964 		aud_ts->m = 15;
965 
966 	aud_ts->n = cdclk * aud_ts->m / 24000;
967 }
968 
intel_audio_cdclk_change_post(struct drm_i915_private * i915)969 void intel_audio_cdclk_change_post(struct drm_i915_private *i915)
970 {
971 	struct aud_ts_cdclk_m_n aud_ts;
972 
973 	if (DISPLAY_VER(i915) >= 13) {
974 		get_aud_ts_cdclk_m_n(i915->display.cdclk.hw.ref, i915->display.cdclk.hw.cdclk, &aud_ts);
975 
976 		intel_de_write(i915, AUD_TS_CDCLK_N, aud_ts.n);
977 		intel_de_write(i915, AUD_TS_CDCLK_M, aud_ts.m | AUD_TS_CDCLK_M_EN);
978 		drm_dbg_kms(&i915->drm, "aud_ts_cdclk set to M=%u, N=%u\n", aud_ts.m, aud_ts.n);
979 	}
980 }
981 
glk_force_audio_cdclk_commit(struct intel_atomic_state * state,struct intel_crtc * crtc,bool enable)982 static int glk_force_audio_cdclk_commit(struct intel_atomic_state *state,
983 					struct intel_crtc *crtc,
984 					bool enable)
985 {
986 	struct intel_cdclk_state *cdclk_state;
987 	int ret;
988 
989 	/* need to hold at least one crtc lock for the global state */
990 	ret = drm_modeset_lock(&crtc->base.mutex, state->base.acquire_ctx);
991 	if (ret)
992 		return ret;
993 
994 	cdclk_state = intel_atomic_get_cdclk_state(state);
995 	if (IS_ERR(cdclk_state))
996 		return PTR_ERR(cdclk_state);
997 
998 	cdclk_state->force_min_cdclk = enable ? 2 * 96000 : 0;
999 
1000 	return drm_atomic_commit(&state->base);
1001 }
1002 
glk_force_audio_cdclk(struct drm_i915_private * dev_priv,bool enable)1003 static void glk_force_audio_cdclk(struct drm_i915_private *dev_priv,
1004 				  bool enable)
1005 {
1006 	struct drm_modeset_acquire_ctx ctx;
1007 	struct drm_atomic_state *state;
1008 	struct intel_crtc *crtc;
1009 	int ret;
1010 
1011 	crtc = intel_first_crtc(dev_priv);
1012 	if (!crtc)
1013 		return;
1014 
1015 	drm_modeset_acquire_init(&ctx, 0);
1016 	state = drm_atomic_state_alloc(&dev_priv->drm);
1017 	if (drm_WARN_ON(&dev_priv->drm, !state))
1018 		return;
1019 
1020 	state->acquire_ctx = &ctx;
1021 
1022 retry:
1023 	ret = glk_force_audio_cdclk_commit(to_intel_atomic_state(state), crtc,
1024 					   enable);
1025 	if (ret == -EDEADLK) {
1026 		drm_atomic_state_clear(state);
1027 		drm_modeset_backoff(&ctx);
1028 		goto retry;
1029 	}
1030 
1031 	drm_WARN_ON(&dev_priv->drm, ret);
1032 
1033 	drm_atomic_state_put(state);
1034 
1035 	drm_modeset_drop_locks(&ctx);
1036 	drm_modeset_acquire_fini(&ctx);
1037 }
1038 
i915_audio_component_get_power(struct device * kdev)1039 static unsigned long i915_audio_component_get_power(struct device *kdev)
1040 {
1041 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
1042 	intel_wakeref_t ret;
1043 
1044 	/* Catch potential impedance mismatches before they occur! */
1045 	BUILD_BUG_ON(sizeof(intel_wakeref_t) > sizeof(unsigned long));
1046 
1047 	ret = intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO_PLAYBACK);
1048 
1049 	if (dev_priv->display.audio.power_refcount++ == 0) {
1050 		if (DISPLAY_VER(dev_priv) >= 9) {
1051 			intel_de_write(dev_priv, AUD_FREQ_CNTRL,
1052 				       dev_priv->display.audio.freq_cntrl);
1053 			drm_dbg_kms(&dev_priv->drm,
1054 				    "restored AUD_FREQ_CNTRL to 0x%x\n",
1055 				    dev_priv->display.audio.freq_cntrl);
1056 		}
1057 
1058 		/* Force CDCLK to 2*BCLK as long as we need audio powered. */
1059 		if (IS_GEMINILAKE(dev_priv))
1060 			glk_force_audio_cdclk(dev_priv, true);
1061 
1062 		if (DISPLAY_VER(dev_priv) >= 10)
1063 			intel_de_write(dev_priv, AUD_PIN_BUF_CTL,
1064 				       (intel_de_read(dev_priv, AUD_PIN_BUF_CTL) | AUD_PIN_BUF_ENABLE));
1065 	}
1066 
1067 	return ret;
1068 }
1069 
i915_audio_component_put_power(struct device * kdev,unsigned long cookie)1070 static void i915_audio_component_put_power(struct device *kdev,
1071 					   unsigned long cookie)
1072 {
1073 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
1074 
1075 	/* Stop forcing CDCLK to 2*BCLK if no need for audio to be powered. */
1076 	if (--dev_priv->display.audio.power_refcount == 0)
1077 		if (IS_GEMINILAKE(dev_priv))
1078 			glk_force_audio_cdclk(dev_priv, false);
1079 
1080 	intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO_PLAYBACK, cookie);
1081 }
1082 
i915_audio_component_codec_wake_override(struct device * kdev,bool enable)1083 static void i915_audio_component_codec_wake_override(struct device *kdev,
1084 						     bool enable)
1085 {
1086 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
1087 	unsigned long cookie;
1088 	u32 tmp;
1089 
1090 	if (DISPLAY_VER(dev_priv) < 9)
1091 		return;
1092 
1093 	cookie = i915_audio_component_get_power(kdev);
1094 
1095 	/*
1096 	 * Enable/disable generating the codec wake signal, overriding the
1097 	 * internal logic to generate the codec wake to controller.
1098 	 */
1099 	tmp = intel_de_read(dev_priv, HSW_AUD_CHICKENBIT);
1100 	tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL;
1101 	intel_de_write(dev_priv, HSW_AUD_CHICKENBIT, tmp);
1102 	usleep_range(1000, 1500);
1103 
1104 	if (enable) {
1105 		tmp = intel_de_read(dev_priv, HSW_AUD_CHICKENBIT);
1106 		tmp |= SKL_AUD_CODEC_WAKE_SIGNAL;
1107 		intel_de_write(dev_priv, HSW_AUD_CHICKENBIT, tmp);
1108 		usleep_range(1000, 1500);
1109 	}
1110 
1111 	i915_audio_component_put_power(kdev, cookie);
1112 }
1113 
1114 /* Get CDCLK in kHz  */
i915_audio_component_get_cdclk_freq(struct device * kdev)1115 static int i915_audio_component_get_cdclk_freq(struct device *kdev)
1116 {
1117 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
1118 
1119 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_DDI(dev_priv)))
1120 		return -ENODEV;
1121 
1122 	return dev_priv->display.cdclk.hw.cdclk;
1123 }
1124 
1125 /*
1126  * get the intel_encoder according to the parameter port and pipe
1127  * intel_encoder is saved by the index of pipe
1128  * MST & (pipe >= 0): return the audio.encoder_map[pipe],
1129  *   when port is matched
1130  * MST & (pipe < 0): this is invalid
1131  * Non-MST & (pipe >= 0): only pipe = 0 (the first device entry)
1132  *   will get the right intel_encoder with port matched
1133  * Non-MST & (pipe < 0): get the right intel_encoder with port matched
1134  */
get_saved_enc(struct drm_i915_private * dev_priv,int port,int pipe)1135 static struct intel_encoder *get_saved_enc(struct drm_i915_private *dev_priv,
1136 					       int port, int pipe)
1137 {
1138 	struct intel_encoder *encoder;
1139 
1140 	/* MST */
1141 	if (pipe >= 0) {
1142 		if (drm_WARN_ON(&dev_priv->drm,
1143 				pipe >= ARRAY_SIZE(dev_priv->display.audio.encoder_map)))
1144 			return NULL;
1145 
1146 		encoder = dev_priv->display.audio.encoder_map[pipe];
1147 		/*
1148 		 * when bootup, audio driver may not know it is
1149 		 * MST or not. So it will poll all the port & pipe
1150 		 * combinations
1151 		 */
1152 		if (encoder != NULL && encoder->port == port &&
1153 		    encoder->type == INTEL_OUTPUT_DP_MST)
1154 			return encoder;
1155 	}
1156 
1157 	/* Non-MST */
1158 	if (pipe > 0)
1159 		return NULL;
1160 
1161 	for_each_pipe(dev_priv, pipe) {
1162 		encoder = dev_priv->display.audio.encoder_map[pipe];
1163 		if (encoder == NULL)
1164 			continue;
1165 
1166 		if (encoder->type == INTEL_OUTPUT_DP_MST)
1167 			continue;
1168 
1169 		if (port == encoder->port)
1170 			return encoder;
1171 	}
1172 
1173 	return NULL;
1174 }
1175 
i915_audio_component_sync_audio_rate(struct device * kdev,int port,int pipe,int rate)1176 static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
1177 						int pipe, int rate)
1178 {
1179 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
1180 	struct i915_audio_component *acomp = dev_priv->display.audio.component;
1181 	struct intel_encoder *encoder;
1182 	struct intel_crtc *crtc;
1183 	unsigned long cookie;
1184 	int err = 0;
1185 
1186 	if (!HAS_DDI(dev_priv))
1187 		return 0;
1188 
1189 	cookie = i915_audio_component_get_power(kdev);
1190 	mutex_lock(&dev_priv->display.audio.mutex);
1191 
1192 	/* 1. get the pipe */
1193 	encoder = get_saved_enc(dev_priv, port, pipe);
1194 	if (!encoder || !encoder->base.crtc) {
1195 		drm_dbg_kms(&dev_priv->drm, "Not valid for port %c\n",
1196 			    port_name(port));
1197 		err = -ENODEV;
1198 		goto unlock;
1199 	}
1200 
1201 	crtc = to_intel_crtc(encoder->base.crtc);
1202 
1203 	/* port must be valid now, otherwise the pipe will be invalid */
1204 	acomp->aud_sample_rate[port] = rate;
1205 
1206 	hsw_audio_config_update(encoder, crtc->config);
1207 
1208  unlock:
1209 	mutex_unlock(&dev_priv->display.audio.mutex);
1210 	i915_audio_component_put_power(kdev, cookie);
1211 	return err;
1212 }
1213 
i915_audio_component_get_eld(struct device * kdev,int port,int pipe,bool * enabled,unsigned char * buf,int max_bytes)1214 static int i915_audio_component_get_eld(struct device *kdev, int port,
1215 					int pipe, bool *enabled,
1216 					unsigned char *buf, int max_bytes)
1217 {
1218 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
1219 	struct intel_encoder *intel_encoder;
1220 	const u8 *eld;
1221 	int ret = -EINVAL;
1222 
1223 	mutex_lock(&dev_priv->display.audio.mutex);
1224 
1225 	intel_encoder = get_saved_enc(dev_priv, port, pipe);
1226 	if (!intel_encoder) {
1227 		drm_dbg_kms(&dev_priv->drm, "Not valid for port %c\n",
1228 			    port_name(port));
1229 		mutex_unlock(&dev_priv->display.audio.mutex);
1230 		return ret;
1231 	}
1232 
1233 	ret = 0;
1234 	*enabled = intel_encoder->audio_connector != NULL;
1235 	if (*enabled) {
1236 		eld = intel_encoder->audio_connector->eld;
1237 		ret = drm_eld_size(eld);
1238 		memcpy(buf, eld, min(max_bytes, ret));
1239 	}
1240 
1241 	mutex_unlock(&dev_priv->display.audio.mutex);
1242 	return ret;
1243 }
1244 
1245 static const struct drm_audio_component_ops i915_audio_component_ops = {
1246 	.owner		= THIS_MODULE,
1247 	.get_power	= i915_audio_component_get_power,
1248 	.put_power	= i915_audio_component_put_power,
1249 	.codec_wake_override = i915_audio_component_codec_wake_override,
1250 	.get_cdclk_freq	= i915_audio_component_get_cdclk_freq,
1251 	.sync_audio_rate = i915_audio_component_sync_audio_rate,
1252 	.get_eld	= i915_audio_component_get_eld,
1253 };
1254 
i915_audio_component_bind(struct device * i915_kdev,struct device * hda_kdev,void * data)1255 static int i915_audio_component_bind(struct device *i915_kdev,
1256 				     struct device *hda_kdev, void *data)
1257 {
1258 	struct i915_audio_component *acomp = data;
1259 	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
1260 	int i;
1261 
1262 	if (drm_WARN_ON(&dev_priv->drm, acomp->base.ops || acomp->base.dev))
1263 		return -EEXIST;
1264 
1265 	if (drm_WARN_ON(&dev_priv->drm,
1266 			!device_link_add(hda_kdev, i915_kdev,
1267 					 DL_FLAG_STATELESS)))
1268 		return -ENOMEM;
1269 
1270 	drm_modeset_lock_all(&dev_priv->drm);
1271 	acomp->base.ops = &i915_audio_component_ops;
1272 	acomp->base.dev = i915_kdev;
1273 	BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
1274 	for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
1275 		acomp->aud_sample_rate[i] = 0;
1276 	dev_priv->display.audio.component = acomp;
1277 	drm_modeset_unlock_all(&dev_priv->drm);
1278 
1279 	return 0;
1280 }
1281 
i915_audio_component_unbind(struct device * i915_kdev,struct device * hda_kdev,void * data)1282 static void i915_audio_component_unbind(struct device *i915_kdev,
1283 					struct device *hda_kdev, void *data)
1284 {
1285 	struct i915_audio_component *acomp = data;
1286 	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
1287 
1288 	drm_modeset_lock_all(&dev_priv->drm);
1289 	acomp->base.ops = NULL;
1290 	acomp->base.dev = NULL;
1291 	dev_priv->display.audio.component = NULL;
1292 	drm_modeset_unlock_all(&dev_priv->drm);
1293 
1294 	device_link_remove(hda_kdev, i915_kdev);
1295 
1296 	if (dev_priv->display.audio.power_refcount)
1297 		drm_err(&dev_priv->drm, "audio power refcount %d after unbind\n",
1298 			dev_priv->display.audio.power_refcount);
1299 }
1300 
1301 static const struct component_ops i915_audio_component_bind_ops = {
1302 	.bind	= i915_audio_component_bind,
1303 	.unbind	= i915_audio_component_unbind,
1304 };
1305 
1306 #define AUD_FREQ_TMODE_SHIFT	14
1307 #define AUD_FREQ_4T		0
1308 #define AUD_FREQ_8T		(2 << AUD_FREQ_TMODE_SHIFT)
1309 #define AUD_FREQ_PULLCLKS(x)	(((x) & 0x3) << 11)
1310 #define AUD_FREQ_BCLK_96M	BIT(4)
1311 
1312 #define AUD_FREQ_GEN12          (AUD_FREQ_8T | AUD_FREQ_PULLCLKS(0) | AUD_FREQ_BCLK_96M)
1313 #define AUD_FREQ_TGL_BROKEN     (AUD_FREQ_8T | AUD_FREQ_PULLCLKS(2) | AUD_FREQ_BCLK_96M)
1314 
1315 /**
1316  * i915_audio_component_init - initialize and register the audio component
1317  * @dev_priv: i915 device instance
1318  *
1319  * This will register with the component framework a child component which
1320  * will bind dynamically to the snd_hda_intel driver's corresponding master
1321  * component when the latter is registered. During binding the child
1322  * initializes an instance of struct i915_audio_component which it receives
1323  * from the master. The master can then start to use the interface defined by
1324  * this struct. Each side can break the binding at any point by deregistering
1325  * its own component after which each side's component unbind callback is
1326  * called.
1327  *
1328  * We ignore any error during registration and continue with reduced
1329  * functionality (i.e. without HDMI audio).
1330  */
i915_audio_component_init(struct drm_i915_private * dev_priv)1331 static void i915_audio_component_init(struct drm_i915_private *dev_priv)
1332 {
1333 	u32 aud_freq, aud_freq_init;
1334 	int ret;
1335 
1336 	ret = component_add_typed(dev_priv->drm.dev,
1337 				  &i915_audio_component_bind_ops,
1338 				  I915_COMPONENT_AUDIO);
1339 	if (ret < 0) {
1340 		drm_err(&dev_priv->drm,
1341 			"failed to add audio component (%d)\n", ret);
1342 		/* continue with reduced functionality */
1343 		return;
1344 	}
1345 
1346 	if (DISPLAY_VER(dev_priv) >= 9) {
1347 		aud_freq_init = intel_de_read(dev_priv, AUD_FREQ_CNTRL);
1348 
1349 		if (DISPLAY_VER(dev_priv) >= 12)
1350 			aud_freq = AUD_FREQ_GEN12;
1351 		else
1352 			aud_freq = aud_freq_init;
1353 
1354 		/* use BIOS provided value for TGL and RKL unless it is a known bad value */
1355 		if ((IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv)) &&
1356 		    aud_freq_init != AUD_FREQ_TGL_BROKEN)
1357 			aud_freq = aud_freq_init;
1358 
1359 		drm_dbg_kms(&dev_priv->drm, "use AUD_FREQ_CNTRL of 0x%x (init value 0x%x)\n",
1360 			    aud_freq, aud_freq_init);
1361 
1362 		dev_priv->display.audio.freq_cntrl = aud_freq;
1363 	}
1364 
1365 	/* init with current cdclk */
1366 	intel_audio_cdclk_change_post(dev_priv);
1367 
1368 	dev_priv->display.audio.component_registered = true;
1369 }
1370 
1371 /**
1372  * i915_audio_component_cleanup - deregister the audio component
1373  * @dev_priv: i915 device instance
1374  *
1375  * Deregisters the audio component, breaking any existing binding to the
1376  * corresponding snd_hda_intel driver's master component.
1377  */
i915_audio_component_cleanup(struct drm_i915_private * dev_priv)1378 static void i915_audio_component_cleanup(struct drm_i915_private *dev_priv)
1379 {
1380 	if (!dev_priv->display.audio.component_registered)
1381 		return;
1382 
1383 	component_del(dev_priv->drm.dev, &i915_audio_component_bind_ops);
1384 	dev_priv->display.audio.component_registered = false;
1385 }
1386 
1387 /**
1388  * intel_audio_init() - Initialize the audio driver either using
1389  * component framework or using lpe audio bridge
1390  * @dev_priv: the i915 drm device private data
1391  *
1392  */
intel_audio_init(struct drm_i915_private * dev_priv)1393 void intel_audio_init(struct drm_i915_private *dev_priv)
1394 {
1395 	if (intel_lpe_audio_init(dev_priv) < 0)
1396 		i915_audio_component_init(dev_priv);
1397 }
1398 
1399 /**
1400  * intel_audio_deinit() - deinitialize the audio driver
1401  * @dev_priv: the i915 drm device private data
1402  *
1403  */
intel_audio_deinit(struct drm_i915_private * dev_priv)1404 void intel_audio_deinit(struct drm_i915_private *dev_priv)
1405 {
1406 	if (dev_priv->display.audio.lpe.platdev != NULL)
1407 		intel_lpe_audio_teardown(dev_priv);
1408 	else
1409 		i915_audio_component_cleanup(dev_priv);
1410 }
1411