xref: /dragonfly/sys/dev/drm/radeon/r600_hdmi.c (revision b0d289c2)
1 /*
2  * Copyright 2008 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
4  * Copyright 2009 Christian König.
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 shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  * Authors: Christian König
25  */
26 #include <linux/hdmi.h>
27 #include <drm/drmP.h>
28 #include <uapi_drm/radeon_drm.h>
29 #include "radeon.h"
30 #include "radeon_asic.h"
31 #include "r600d.h"
32 #include "atom.h"
33 
34 /*
35  * HDMI color format
36  */
37 enum r600_hdmi_color_format {
38 	RGB = 0,
39 	YCC_422 = 1,
40 	YCC_444 = 2
41 };
42 
43 /*
44  * IEC60958 status bits
45  */
46 enum r600_hdmi_iec_status_bits {
47 	AUDIO_STATUS_DIG_ENABLE   = 0x01,
48 	AUDIO_STATUS_V            = 0x02,
49 	AUDIO_STATUS_VCFG         = 0x04,
50 	AUDIO_STATUS_EMPHASIS     = 0x08,
51 	AUDIO_STATUS_COPYRIGHT    = 0x10,
52 	AUDIO_STATUS_NONAUDIO     = 0x20,
53 	AUDIO_STATUS_PROFESSIONAL = 0x40,
54 	AUDIO_STATUS_LEVEL        = 0x80
55 };
56 
57 static const struct radeon_hdmi_acr r600_hdmi_predefined_acr[] = {
58     /*	     32kHz	  44.1kHz	48kHz    */
59     /* Clock      N     CTS      N     CTS      N     CTS */
60     {  25174,  4576,  28125,  7007,  31250,  6864,  28125 }, /*  25,20/1.001 MHz */
61     {  25200,  4096,  25200,  6272,  28000,  6144,  25200 }, /*  25.20       MHz */
62     {  27000,  4096,  27000,  6272,  30000,  6144,  27000 }, /*  27.00       MHz */
63     {  27027,  4096,  27027,  6272,  30030,  6144,  27027 }, /*  27.00*1.001 MHz */
64     {  54000,  4096,  54000,  6272,  60000,  6144,  54000 }, /*  54.00       MHz */
65     {  54054,  4096,  54054,  6272,  60060,  6144,  54054 }, /*  54.00*1.001 MHz */
66     {  74175, 11648, 210937, 17836, 234375, 11648, 140625 }, /*  74.25/1.001 MHz */
67     {  74250,  4096,  74250,  6272,  82500,  6144,  74250 }, /*  74.25       MHz */
68     { 148351, 11648, 421875,  8918, 234375,  5824, 140625 }, /* 148.50/1.001 MHz */
69     { 148500,  4096, 148500,  6272, 165000,  6144, 148500 }, /* 148.50       MHz */
70     {      0,  4096,      0,  6272,      0,  6144,      0 }  /* Other */
71 };
72 
73 /*
74  * calculate CTS value if it's not found in the table
75  */
76 static void r600_hdmi_calc_cts(uint32_t clock, int *CTS, int N, int freq)
77 {
78 	if (*CTS == 0)
79 		*CTS = clock * N / (128 * freq) * 1000;
80 	DRM_DEBUG("Using ACR timing N=%d CTS=%d for frequency %d\n",
81 		  N, *CTS, freq);
82 }
83 
84 struct radeon_hdmi_acr r600_hdmi_acr(uint32_t clock)
85 {
86 	struct radeon_hdmi_acr res;
87 	u8 i;
88 
89 	for (i = 0; r600_hdmi_predefined_acr[i].clock != clock &&
90 	     r600_hdmi_predefined_acr[i].clock != 0; i++)
91 		;
92 	res = r600_hdmi_predefined_acr[i];
93 
94 	/* In case some CTS are missing */
95 	r600_hdmi_calc_cts(clock, &res.cts_32khz, res.n_32khz, 32000);
96 	r600_hdmi_calc_cts(clock, &res.cts_44_1khz, res.n_44_1khz, 44100);
97 	r600_hdmi_calc_cts(clock, &res.cts_48khz, res.n_48khz, 48000);
98 
99 	return res;
100 }
101 
102 /*
103  * update the N and CTS parameters for a given pixel clock rate
104  */
105 static void r600_hdmi_update_ACR(struct drm_encoder *encoder, uint32_t clock)
106 {
107 	struct drm_device *dev = encoder->dev;
108 	struct radeon_device *rdev = dev->dev_private;
109 	struct radeon_hdmi_acr acr = r600_hdmi_acr(clock);
110 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
111 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
112 	uint32_t offset = dig->afmt->offset;
113 
114 	WREG32(HDMI0_ACR_32_0 + offset, HDMI0_ACR_CTS_32(acr.cts_32khz));
115 	WREG32(HDMI0_ACR_32_1 + offset, acr.n_32khz);
116 
117 	WREG32(HDMI0_ACR_44_0 + offset, HDMI0_ACR_CTS_44(acr.cts_44_1khz));
118 	WREG32(HDMI0_ACR_44_1 + offset, acr.n_44_1khz);
119 
120 	WREG32(HDMI0_ACR_48_0 + offset, HDMI0_ACR_CTS_48(acr.cts_48khz));
121 	WREG32(HDMI0_ACR_48_1 + offset, acr.n_48khz);
122 }
123 
124 /*
125  * build a HDMI Video Info Frame
126  */
127 static void r600_hdmi_update_avi_infoframe(struct drm_encoder *encoder,
128 					   void *buffer, size_t size)
129 {
130 	struct drm_device *dev = encoder->dev;
131 	struct radeon_device *rdev = dev->dev_private;
132 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
133 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
134 	uint32_t offset = dig->afmt->offset;
135 	uint8_t *frame = (uint8_t*)buffer + 3;
136 	uint8_t *header = buffer;
137 
138 	WREG32(HDMI0_AVI_INFO0 + offset,
139 		frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
140 	WREG32(HDMI0_AVI_INFO1 + offset,
141 		frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x7] << 24));
142 	WREG32(HDMI0_AVI_INFO2 + offset,
143 		frame[0x8] | (frame[0x9] << 8) | (frame[0xA] << 16) | (frame[0xB] << 24));
144 	WREG32(HDMI0_AVI_INFO3 + offset,
145 		frame[0xC] | (frame[0xD] << 8) | (header[1] << 24));
146 }
147 
148 /*
149  * build a Audio Info Frame
150  */
151 static void r600_hdmi_update_audio_infoframe(struct drm_encoder *encoder,
152 					     const void *buffer, size_t size)
153 {
154 	struct drm_device *dev = encoder->dev;
155 	struct radeon_device *rdev = dev->dev_private;
156 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
157 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
158 	uint32_t offset = dig->afmt->offset;
159 	const u8 *frame = (const u8*)buffer + 3;
160 
161 	WREG32(HDMI0_AUDIO_INFO0 + offset,
162 		frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
163 	WREG32(HDMI0_AUDIO_INFO1 + offset,
164 		frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x8] << 24));
165 }
166 
167 /*
168  * test if audio buffer is filled enough to start playing
169  */
170 static bool r600_hdmi_is_audio_buffer_filled(struct drm_encoder *encoder)
171 {
172 	struct drm_device *dev = encoder->dev;
173 	struct radeon_device *rdev = dev->dev_private;
174 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
175 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
176 	uint32_t offset = dig->afmt->offset;
177 
178 	return (RREG32(HDMI0_STATUS + offset) & 0x10) != 0;
179 }
180 
181 /*
182  * have buffer status changed since last call?
183  */
184 int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder)
185 {
186 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
187 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
188 	int status, result;
189 
190 	if (!dig->afmt || !dig->afmt->enabled)
191 		return 0;
192 
193 	status = r600_hdmi_is_audio_buffer_filled(encoder);
194 	result = dig->afmt->last_buffer_filled_status != status;
195 	dig->afmt->last_buffer_filled_status = status;
196 
197 	return result;
198 }
199 
200 /*
201  * write the audio workaround status to the hardware
202  */
203 static void r600_hdmi_audio_workaround(struct drm_encoder *encoder)
204 {
205 	struct drm_device *dev = encoder->dev;
206 	struct radeon_device *rdev = dev->dev_private;
207 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
208 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
209 	uint32_t offset = dig->afmt->offset;
210 	bool hdmi_audio_workaround = false; /* FIXME */
211 	u32 value;
212 
213 	if (!hdmi_audio_workaround ||
214 	    r600_hdmi_is_audio_buffer_filled(encoder))
215 		value = 0; /* disable workaround */
216 	else
217 		value = HDMI0_AUDIO_TEST_EN; /* enable workaround */
218 	WREG32_P(HDMI0_AUDIO_PACKET_CONTROL + offset,
219 		 value, ~HDMI0_AUDIO_TEST_EN);
220 }
221 
222 void r600_audio_set_dto(struct drm_encoder *encoder, u32 clock)
223 {
224 	struct drm_device *dev = encoder->dev;
225 	struct radeon_device *rdev = dev->dev_private;
226 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
227 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
228 	u32 base_rate = 24000;
229 	u32 max_ratio = clock / base_rate;
230 	u32 dto_phase;
231 	u32 dto_modulo = clock;
232 	u32 wallclock_ratio;
233 	u32 dto_cntl;
234 
235 	if (!dig || !dig->afmt)
236 		return;
237 
238 	if (max_ratio >= 8) {
239 		dto_phase = 192 * 1000;
240 		wallclock_ratio = 3;
241 	} else if (max_ratio >= 4) {
242 		dto_phase = 96 * 1000;
243 		wallclock_ratio = 2;
244 	} else if (max_ratio >= 2) {
245 		dto_phase = 48 * 1000;
246 		wallclock_ratio = 1;
247 	} else {
248 		dto_phase = 24 * 1000;
249 		wallclock_ratio = 0;
250 	}
251 
252 	/* there are two DTOs selected by DCCG_AUDIO_DTO_SELECT.
253 	 * doesn't matter which one you use.  Just use the first one.
254 	 */
255 	/* XXX two dtos; generally use dto0 for hdmi */
256 	/* Express [24MHz / target pixel clock] as an exact rational
257 	 * number (coefficient of two integer numbers.  DCCG_AUDIO_DTOx_PHASE
258 	 * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
259 	 */
260 	if (ASIC_IS_DCE3(rdev)) {
261 		/* according to the reg specs, this should DCE3.2 only, but in
262 		 * practice it seems to cover DCE3.0 as well.
263 		 */
264 		if (dig->dig_encoder == 0) {
265 			dto_cntl = RREG32(DCCG_AUDIO_DTO0_CNTL) & ~DCCG_AUDIO_DTO_WALLCLOCK_RATIO_MASK;
266 			dto_cntl |= DCCG_AUDIO_DTO_WALLCLOCK_RATIO(wallclock_ratio);
267 			WREG32(DCCG_AUDIO_DTO0_CNTL, dto_cntl);
268 			WREG32(DCCG_AUDIO_DTO0_PHASE, dto_phase);
269 			WREG32(DCCG_AUDIO_DTO0_MODULE, dto_modulo);
270 			WREG32(DCCG_AUDIO_DTO_SELECT, 0); /* select DTO0 */
271 		} else {
272 			dto_cntl = RREG32(DCCG_AUDIO_DTO1_CNTL) & ~DCCG_AUDIO_DTO_WALLCLOCK_RATIO_MASK;
273 			dto_cntl |= DCCG_AUDIO_DTO_WALLCLOCK_RATIO(wallclock_ratio);
274 			WREG32(DCCG_AUDIO_DTO1_CNTL, dto_cntl);
275 			WREG32(DCCG_AUDIO_DTO1_PHASE, dto_phase);
276 			WREG32(DCCG_AUDIO_DTO1_MODULE, dto_modulo);
277 			WREG32(DCCG_AUDIO_DTO_SELECT, 1); /* select DTO1 */
278 		}
279 	} else {
280 		/* according to the reg specs, this should be DCE2.0 and DCE3.0 */
281 		WREG32(AUDIO_DTO, AUDIO_DTO_PHASE(base_rate / 10) |
282 		       AUDIO_DTO_MODULE(clock / 10));
283 	}
284 }
285 
286 /*
287  * update the info frames with the data from the current display mode
288  */
289 void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode)
290 {
291 	struct drm_device *dev = encoder->dev;
292 	struct radeon_device *rdev = dev->dev_private;
293 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
294 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
295 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
296 	struct hdmi_avi_infoframe frame;
297 	uint32_t offset;
298 	ssize_t err;
299 
300 	if (!dig || !dig->afmt)
301 		return;
302 
303 	/* Silent, r600_hdmi_enable will raise WARN for us */
304 	if (!dig->afmt->enabled)
305 		return;
306 	offset = dig->afmt->offset;
307 
308 	r600_audio_set_dto(encoder, mode->clock);
309 
310 	WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
311 	       HDMI0_NULL_SEND); /* send null packets when required */
312 
313 	WREG32(HDMI0_AUDIO_CRC_CONTROL + offset, 0x1000);
314 
315 	if (ASIC_IS_DCE32(rdev)) {
316 		WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,
317 		       HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */
318 		       HDMI0_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */
319 		WREG32(AFMT_AUDIO_PACKET_CONTROL + offset,
320 		       AFMT_AUDIO_SAMPLE_SEND | /* send audio packets */
321 		       AFMT_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
322 	} else {
323 		WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,
324 		       HDMI0_AUDIO_SAMPLE_SEND | /* send audio packets */
325 		       HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */
326 		       HDMI0_AUDIO_PACKETS_PER_LINE(3) | /* should be suffient for all audio modes and small enough for all hblanks */
327 		       HDMI0_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
328 	}
329 
330 	WREG32(HDMI0_ACR_PACKET_CONTROL + offset,
331 	       HDMI0_ACR_AUTO_SEND | /* allow hw to sent ACR packets when required */
332 	       HDMI0_ACR_SOURCE); /* select SW CTS value */
333 
334 	WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
335 	       HDMI0_NULL_SEND | /* send null packets when required */
336 	       HDMI0_GC_SEND | /* send general control packets */
337 	       HDMI0_GC_CONT); /* send general control packets every frame */
338 
339 	/* TODO: HDMI0_AUDIO_INFO_UPDATE */
340 	WREG32(HDMI0_INFOFRAME_CONTROL0 + offset,
341 	       HDMI0_AVI_INFO_SEND | /* enable AVI info frames */
342 	       HDMI0_AVI_INFO_CONT | /* send AVI info frames every frame/field */
343 	       HDMI0_AUDIO_INFO_SEND | /* enable audio info frames (frames won't be set until audio is enabled) */
344 	       HDMI0_AUDIO_INFO_CONT); /* send audio info frames every frame/field */
345 
346 	WREG32(HDMI0_INFOFRAME_CONTROL1 + offset,
347 	       HDMI0_AVI_INFO_LINE(2) | /* anything other than 0 */
348 	       HDMI0_AUDIO_INFO_LINE(2)); /* anything other than 0 */
349 
350 	WREG32(HDMI0_GC + offset, 0); /* unset HDMI0_GC_AVMUTE */
351 
352 	err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
353 	if (err < 0) {
354 		DRM_ERROR("failed to setup AVI infoframe: %zd\n", err);
355 		return;
356 	}
357 
358 	err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
359 	if (err < 0) {
360 		DRM_ERROR("failed to pack AVI infoframe: %zd\n", err);
361 		return;
362 	}
363 
364 	r600_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));
365 	r600_hdmi_update_ACR(encoder, mode->clock);
366 
367 	/* it's unknown what these bits do excatly, but it's indeed quite useful for debugging */
368 	WREG32(HDMI0_RAMP_CONTROL0 + offset, 0x00FFFFFF);
369 	WREG32(HDMI0_RAMP_CONTROL1 + offset, 0x007FFFFF);
370 	WREG32(HDMI0_RAMP_CONTROL2 + offset, 0x00000001);
371 	WREG32(HDMI0_RAMP_CONTROL3 + offset, 0x00000001);
372 
373 	r600_hdmi_audio_workaround(encoder);
374 }
375 
376 /*
377  * update settings with current parameters from audio engine
378  */
379 void r600_hdmi_update_audio_settings(struct drm_encoder *encoder)
380 {
381 	struct drm_device *dev = encoder->dev;
382 	struct radeon_device *rdev = dev->dev_private;
383 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
384 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
385 	struct r600_audio audio = r600_audio_status(rdev);
386 	uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
387 	struct hdmi_audio_infoframe frame;
388 	uint32_t offset;
389 	uint32_t iec;
390 	ssize_t err;
391 
392 	if (!dig->afmt || !dig->afmt->enabled)
393 		return;
394 	offset = dig->afmt->offset;
395 
396 	DRM_DEBUG("%s with %d channels, %d Hz sampling rate, %d bits per sample,\n",
397 		 r600_hdmi_is_audio_buffer_filled(encoder) ? "playing" : "stopped",
398 		  audio.channels, audio.rate, audio.bits_per_sample);
399 	DRM_DEBUG("0x%02X IEC60958 status bits and 0x%02X category code\n",
400 		  (int)audio.status_bits, (int)audio.category_code);
401 
402 	iec = 0;
403 	if (audio.status_bits & AUDIO_STATUS_PROFESSIONAL)
404 		iec |= 1 << 0;
405 	if (audio.status_bits & AUDIO_STATUS_NONAUDIO)
406 		iec |= 1 << 1;
407 	if (audio.status_bits & AUDIO_STATUS_COPYRIGHT)
408 		iec |= 1 << 2;
409 	if (audio.status_bits & AUDIO_STATUS_EMPHASIS)
410 		iec |= 1 << 3;
411 
412 	iec |= HDMI0_60958_CS_CATEGORY_CODE(audio.category_code);
413 
414 	switch (audio.rate) {
415 	case 32000:
416 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x3);
417 		break;
418 	case 44100:
419 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x0);
420 		break;
421 	case 48000:
422 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x2);
423 		break;
424 	case 88200:
425 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x8);
426 		break;
427 	case 96000:
428 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xa);
429 		break;
430 	case 176400:
431 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xc);
432 		break;
433 	case 192000:
434 		iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xe);
435 		break;
436 	}
437 
438 	WREG32(HDMI0_60958_0 + offset, iec);
439 
440 	iec = 0;
441 	switch (audio.bits_per_sample) {
442 	case 16:
443 		iec |= HDMI0_60958_CS_WORD_LENGTH(0x2);
444 		break;
445 	case 20:
446 		iec |= HDMI0_60958_CS_WORD_LENGTH(0x3);
447 		break;
448 	case 24:
449 		iec |= HDMI0_60958_CS_WORD_LENGTH(0xb);
450 		break;
451 	}
452 	if (audio.status_bits & AUDIO_STATUS_V)
453 		iec |= 0x5 << 16;
454 	WREG32_P(HDMI0_60958_1 + offset, iec, ~0x5000f);
455 
456 	err = hdmi_audio_infoframe_init(&frame);
457 	if (err < 0) {
458 		DRM_ERROR("failed to setup audio infoframe\n");
459 		return;
460 	}
461 
462 	frame.channels = audio.channels;
463 
464 	err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
465 	if (err < 0) {
466 		DRM_ERROR("failed to pack audio infoframe\n");
467 		return;
468 	}
469 
470 	r600_hdmi_update_audio_infoframe(encoder, buffer, sizeof(buffer));
471 	r600_hdmi_audio_workaround(encoder);
472 }
473 
474 /*
475  * enable the HDMI engine
476  */
477 void r600_hdmi_enable(struct drm_encoder *encoder, bool enable)
478 {
479 	struct drm_device *dev = encoder->dev;
480 	struct radeon_device *rdev = dev->dev_private;
481 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
482 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
483 	u32 hdmi = HDMI0_ERROR_ACK;
484 
485 	if (!dig || !dig->afmt)
486 		return;
487 
488 	/* Silent, r600_hdmi_enable will raise WARN for us */
489 	if (enable && dig->afmt->enabled)
490 		return;
491 	if (!enable && !dig->afmt->enabled)
492 		return;
493 
494 	/* Older chipsets require setting HDMI and routing manually */
495 	if (!ASIC_IS_DCE3(rdev)) {
496 		if (enable)
497 			hdmi |= HDMI0_ENABLE;
498 		switch (radeon_encoder->encoder_id) {
499 		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
500 			if (enable) {
501 				WREG32_OR(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN);
502 				hdmi |= HDMI0_STREAM(HDMI0_STREAM_TMDSA);
503 			} else {
504 				WREG32_AND(AVIVO_TMDSA_CNTL, ~AVIVO_TMDSA_CNTL_HDMI_EN);
505 			}
506 			break;
507 		case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
508 			if (enable) {
509 				WREG32_OR(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN);
510 				hdmi |= HDMI0_STREAM(HDMI0_STREAM_LVTMA);
511 			} else {
512 				WREG32_AND(AVIVO_LVTMA_CNTL, ~AVIVO_LVTMA_CNTL_HDMI_EN);
513 			}
514 			break;
515 		case ENCODER_OBJECT_ID_INTERNAL_DDI:
516 			if (enable) {
517 				WREG32_OR(DDIA_CNTL, DDIA_HDMI_EN);
518 				hdmi |= HDMI0_STREAM(HDMI0_STREAM_DDIA);
519 			} else {
520 				WREG32_AND(DDIA_CNTL, ~DDIA_HDMI_EN);
521 			}
522 			break;
523 		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
524 			if (enable)
525 				hdmi |= HDMI0_STREAM(HDMI0_STREAM_DVOA);
526 			break;
527 		default:
528 			dev_err(rdev->dev, "Invalid encoder for HDMI: 0x%X\n",
529 				radeon_encoder->encoder_id);
530 			break;
531 		}
532 		WREG32(HDMI0_CONTROL + dig->afmt->offset, hdmi);
533 	}
534 
535 	if (rdev->irq.installed) {
536 		/* if irq is available use it */
537 		/* XXX: shouldn't need this on any asics.  Double check DCE2/3 */
538 		if (enable)
539 			radeon_irq_kms_enable_afmt(rdev, dig->afmt->id);
540 		else
541 			radeon_irq_kms_disable_afmt(rdev, dig->afmt->id);
542 	}
543 
544 	dig->afmt->enabled = enable;
545 
546 	DRM_DEBUG("%sabling HDMI interface @ 0x%04X for encoder 0x%x\n",
547 		  enable ? "En" : "Dis", dig->afmt->offset, radeon_encoder->encoder_id);
548 }
549