2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Christian König.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Christian König
26 #include <linux/hdmi.h>
27 #include <linux/gcd.h>
29 #include <drm/radeon_drm.h>
31 #include "radeon_asic.h"
38 enum r600_hdmi_color_format {
45 * IEC60958 status bits
47 enum r600_hdmi_iec_status_bits {
48 AUDIO_STATUS_DIG_ENABLE = 0x01,
49 AUDIO_STATUS_V = 0x02,
50 AUDIO_STATUS_VCFG = 0x04,
51 AUDIO_STATUS_EMPHASIS = 0x08,
52 AUDIO_STATUS_COPYRIGHT = 0x10,
53 AUDIO_STATUS_NONAUDIO = 0x20,
54 AUDIO_STATUS_PROFESSIONAL = 0x40,
55 AUDIO_STATUS_LEVEL = 0x80
58 static const struct radeon_hdmi_acr r600_hdmi_predefined_acr[] = {
59 /* 32kHz 44.1kHz 48kHz */
60 /* Clock N CTS N CTS N CTS */
61 { 25175, 4096, 25175, 28224, 125875, 6144, 25175 }, /* 25,20/1.001 MHz */
62 { 25200, 4096, 25200, 6272, 28000, 6144, 25200 }, /* 25.20 MHz */
63 { 27000, 4096, 27000, 6272, 30000, 6144, 27000 }, /* 27.00 MHz */
64 { 27027, 4096, 27027, 6272, 30030, 6144, 27027 }, /* 27.00*1.001 MHz */
65 { 54000, 4096, 54000, 6272, 60000, 6144, 54000 }, /* 54.00 MHz */
66 { 54054, 4096, 54054, 6272, 60060, 6144, 54054 }, /* 54.00*1.001 MHz */
67 { 74176, 4096, 74176, 5733, 75335, 6144, 74176 }, /* 74.25/1.001 MHz */
68 { 74250, 4096, 74250, 6272, 82500, 6144, 74250 }, /* 74.25 MHz */
69 { 148352, 4096, 148352, 5733, 150670, 6144, 148352 }, /* 148.50/1.001 MHz */
70 { 148500, 4096, 148500, 6272, 165000, 6144, 148500 }, /* 148.50 MHz */
75 * calculate CTS and N values if they are not found in the table
77 static void r600_hdmi_calc_cts(uint32_t clock, int *CTS, int *N, int freq)
80 unsigned long div, mul;
82 /* Safe, but overly large values */
86 /* Smallest valid fraction */
93 * The optimal N is 128*freq/1000. Calculate the closest larger
94 * value that doesn't truncate any bits.
96 mul = ((128*freq/1000) + (n-1))/n;
101 /* Check that we are in spec (not always possible) */
102 if (n < (128*freq/1500))
103 printk(KERN_WARNING "Calculated ACR N value is too small. You may experience audio problems.\n");
104 if (n > (128*freq/300))
105 printk(KERN_WARNING "Calculated ACR N value is too large. You may experience audio problems.\n");
110 DRM_DEBUG("Calculated ACR timing N=%d CTS=%d for frequency %d\n",
114 struct radeon_hdmi_acr r600_hdmi_acr(uint32_t clock)
116 struct radeon_hdmi_acr res;
119 /* Precalculated values for common clocks */
120 for (i = 0; i < ARRAY_SIZE(r600_hdmi_predefined_acr); i++) {
121 if (r600_hdmi_predefined_acr[i].clock == clock)
122 return r600_hdmi_predefined_acr[i];
125 /* And odd clocks get manually calculated */
126 r600_hdmi_calc_cts(clock, &res.cts_32khz, &res.n_32khz, 32000);
127 r600_hdmi_calc_cts(clock, &res.cts_44_1khz, &res.n_44_1khz, 44100);
128 r600_hdmi_calc_cts(clock, &res.cts_48khz, &res.n_48khz, 48000);
134 * update the N and CTS parameters for a given pixel clock rate
136 static void r600_hdmi_update_ACR(struct drm_encoder *encoder, uint32_t clock)
138 struct drm_device *dev = encoder->dev;
139 struct radeon_device *rdev = dev->dev_private;
140 struct radeon_hdmi_acr acr = r600_hdmi_acr(clock);
141 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
142 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
143 uint32_t offset = dig->afmt->offset;
145 WREG32(HDMI0_ACR_32_0 + offset, HDMI0_ACR_CTS_32(acr.cts_32khz));
146 WREG32(HDMI0_ACR_32_1 + offset, acr.n_32khz);
148 WREG32(HDMI0_ACR_44_0 + offset, HDMI0_ACR_CTS_44(acr.cts_44_1khz));
149 WREG32(HDMI0_ACR_44_1 + offset, acr.n_44_1khz);
151 WREG32(HDMI0_ACR_48_0 + offset, HDMI0_ACR_CTS_48(acr.cts_48khz));
152 WREG32(HDMI0_ACR_48_1 + offset, acr.n_48khz);
156 * build a HDMI Video Info Frame
158 static void r600_hdmi_update_avi_infoframe(struct drm_encoder *encoder,
159 void *buffer, size_t size)
161 struct drm_device *dev = encoder->dev;
162 struct radeon_device *rdev = dev->dev_private;
163 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
164 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
165 uint32_t offset = dig->afmt->offset;
166 uint8_t *frame = buffer + 3;
167 uint8_t *header = buffer;
169 WREG32(HDMI0_AVI_INFO0 + offset,
170 frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
171 WREG32(HDMI0_AVI_INFO1 + offset,
172 frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x7] << 24));
173 WREG32(HDMI0_AVI_INFO2 + offset,
174 frame[0x8] | (frame[0x9] << 8) | (frame[0xA] << 16) | (frame[0xB] << 24));
175 WREG32(HDMI0_AVI_INFO3 + offset,
176 frame[0xC] | (frame[0xD] << 8) | (header[1] << 24));
180 * build a Audio Info Frame
182 static void r600_hdmi_update_audio_infoframe(struct drm_encoder *encoder,
183 const void *buffer, size_t size)
185 struct drm_device *dev = encoder->dev;
186 struct radeon_device *rdev = dev->dev_private;
187 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
188 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
189 uint32_t offset = dig->afmt->offset;
190 const u8 *frame = buffer + 3;
192 WREG32(HDMI0_AUDIO_INFO0 + offset,
193 frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
194 WREG32(HDMI0_AUDIO_INFO1 + offset,
195 frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x8] << 24));
199 * test if audio buffer is filled enough to start playing
201 static bool r600_hdmi_is_audio_buffer_filled(struct drm_encoder *encoder)
203 struct drm_device *dev = encoder->dev;
204 struct radeon_device *rdev = dev->dev_private;
205 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
206 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
207 uint32_t offset = dig->afmt->offset;
209 return (RREG32(HDMI0_STATUS + offset) & 0x10) != 0;
213 * have buffer status changed since last call?
215 int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder)
217 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
218 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
221 if (!dig->afmt || !dig->afmt->enabled)
224 status = r600_hdmi_is_audio_buffer_filled(encoder);
225 result = dig->afmt->last_buffer_filled_status != status;
226 dig->afmt->last_buffer_filled_status = status;
232 * write the audio workaround status to the hardware
234 static void r600_hdmi_audio_workaround(struct drm_encoder *encoder)
236 struct drm_device *dev = encoder->dev;
237 struct radeon_device *rdev = dev->dev_private;
238 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
239 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
240 uint32_t offset = dig->afmt->offset;
241 bool hdmi_audio_workaround = false; /* FIXME */
244 if (!hdmi_audio_workaround ||
245 r600_hdmi_is_audio_buffer_filled(encoder))
246 value = 0; /* disable workaround */
248 value = HDMI0_AUDIO_TEST_EN; /* enable workaround */
249 WREG32_P(HDMI0_AUDIO_PACKET_CONTROL + offset,
250 value, ~HDMI0_AUDIO_TEST_EN);
253 void r600_audio_set_dto(struct drm_encoder *encoder, u32 clock)
255 struct drm_device *dev = encoder->dev;
256 struct radeon_device *rdev = dev->dev_private;
257 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
258 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
259 u32 base_rate = 24000;
261 if (!dig || !dig->afmt)
264 /* there are two DTOs selected by DCCG_AUDIO_DTO_SELECT.
265 * doesn't matter which one you use. Just use the first one.
267 /* XXX two dtos; generally use dto0 for hdmi */
268 /* Express [24MHz / target pixel clock] as an exact rational
269 * number (coefficient of two integer numbers. DCCG_AUDIO_DTOx_PHASE
270 * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
272 if (ASIC_IS_DCE32(rdev)) {
273 if (dig->dig_encoder == 0) {
274 WREG32(DCCG_AUDIO_DTO0_PHASE, base_rate * 100);
275 WREG32(DCCG_AUDIO_DTO0_MODULE, clock * 100);
276 WREG32(DCCG_AUDIO_DTO_SELECT, 0); /* select DTO0 */
278 WREG32(DCCG_AUDIO_DTO1_PHASE, base_rate * 100);
279 WREG32(DCCG_AUDIO_DTO1_MODULE, clock * 100);
280 WREG32(DCCG_AUDIO_DTO_SELECT, 1); /* select DTO1 */
282 } else if (ASIC_IS_DCE3(rdev)) {
283 /* according to the reg specs, this should DCE3.2 only, but in
284 * practice it seems to cover DCE3.0/3.1 as well.
286 if (dig->dig_encoder == 0) {
287 WREG32(DCCG_AUDIO_DTO0_PHASE, base_rate * 100);
288 WREG32(DCCG_AUDIO_DTO0_MODULE, clock * 100);
289 WREG32(DCCG_AUDIO_DTO_SELECT, 0); /* select DTO0 */
291 WREG32(DCCG_AUDIO_DTO1_PHASE, base_rate * 100);
292 WREG32(DCCG_AUDIO_DTO1_MODULE, clock * 100);
293 WREG32(DCCG_AUDIO_DTO_SELECT, 1); /* select DTO1 */
296 /* according to the reg specs, this should be DCE2.0 and DCE3.0/3.1 */
297 WREG32(AUDIO_DTO, AUDIO_DTO_PHASE(base_rate / 10) |
298 AUDIO_DTO_MODULE(clock / 10));
303 * update the info frames with the data from the current display mode
305 void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode)
307 struct drm_device *dev = encoder->dev;
308 struct radeon_device *rdev = dev->dev_private;
309 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
310 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
311 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
312 struct hdmi_avi_infoframe frame;
316 if (!dig || !dig->afmt)
319 /* Silent, r600_hdmi_enable will raise WARN for us */
320 if (!dig->afmt->enabled)
322 offset = dig->afmt->offset;
324 r600_audio_set_dto(encoder, mode->clock);
326 WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
327 HDMI0_NULL_SEND); /* send null packets when required */
329 WREG32(HDMI0_AUDIO_CRC_CONTROL + offset, 0x1000);
331 if (ASIC_IS_DCE32(rdev)) {
332 WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,
333 HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */
334 HDMI0_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */
335 WREG32(AFMT_AUDIO_PACKET_CONTROL + offset,
336 AFMT_AUDIO_SAMPLE_SEND | /* send audio packets */
337 AFMT_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
339 WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,
340 HDMI0_AUDIO_SAMPLE_SEND | /* send audio packets */
341 HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */
342 HDMI0_AUDIO_PACKETS_PER_LINE(3) | /* should be suffient for all audio modes and small enough for all hblanks */
343 HDMI0_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
346 WREG32(HDMI0_ACR_PACKET_CONTROL + offset,
347 HDMI0_ACR_SOURCE | /* select SW CTS value - XXX verify that hw CTS works on all families */
348 HDMI0_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */
350 WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
351 HDMI0_NULL_SEND | /* send null packets when required */
352 HDMI0_GC_SEND | /* send general control packets */
353 HDMI0_GC_CONT); /* send general control packets every frame */
355 /* TODO: HDMI0_AUDIO_INFO_UPDATE */
356 WREG32(HDMI0_INFOFRAME_CONTROL0 + offset,
357 HDMI0_AVI_INFO_SEND | /* enable AVI info frames */
358 HDMI0_AVI_INFO_CONT | /* send AVI info frames every frame/field */
359 HDMI0_AUDIO_INFO_SEND | /* enable audio info frames (frames won't be set until audio is enabled) */
360 HDMI0_AUDIO_INFO_CONT); /* send audio info frames every frame/field */
362 WREG32(HDMI0_INFOFRAME_CONTROL1 + offset,
363 HDMI0_AVI_INFO_LINE(2) | /* anything other than 0 */
364 HDMI0_AUDIO_INFO_LINE(2)); /* anything other than 0 */
366 WREG32(HDMI0_GC + offset, 0); /* unset HDMI0_GC_AVMUTE */
368 err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
370 DRM_ERROR("failed to setup AVI infoframe: %zd\n", err);
374 err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
376 DRM_ERROR("failed to pack AVI infoframe: %zd\n", err);
380 r600_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));
381 r600_hdmi_update_ACR(encoder, mode->clock);
383 /* it's unknown what these bits do excatly, but it's indeed quite useful for debugging */
384 WREG32(HDMI0_RAMP_CONTROL0 + offset, 0x00FFFFFF);
385 WREG32(HDMI0_RAMP_CONTROL1 + offset, 0x007FFFFF);
386 WREG32(HDMI0_RAMP_CONTROL2 + offset, 0x00000001);
387 WREG32(HDMI0_RAMP_CONTROL3 + offset, 0x00000001);
389 r600_hdmi_audio_workaround(encoder);
393 * update settings with current parameters from audio engine
395 void r600_hdmi_update_audio_settings(struct drm_encoder *encoder)
397 struct drm_device *dev = encoder->dev;
398 struct radeon_device *rdev = dev->dev_private;
399 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
400 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
401 struct r600_audio audio = r600_audio_status(rdev);
402 uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
403 struct hdmi_audio_infoframe frame;
408 if (!dig->afmt || !dig->afmt->enabled)
410 offset = dig->afmt->offset;
412 DRM_DEBUG("%s with %d channels, %d Hz sampling rate, %d bits per sample,\n",
413 r600_hdmi_is_audio_buffer_filled(encoder) ? "playing" : "stopped",
414 audio.channels, audio.rate, audio.bits_per_sample);
415 DRM_DEBUG("0x%02X IEC60958 status bits and 0x%02X category code\n",
416 (int)audio.status_bits, (int)audio.category_code);
419 if (audio.status_bits & AUDIO_STATUS_PROFESSIONAL)
421 if (audio.status_bits & AUDIO_STATUS_NONAUDIO)
423 if (audio.status_bits & AUDIO_STATUS_COPYRIGHT)
425 if (audio.status_bits & AUDIO_STATUS_EMPHASIS)
428 iec |= HDMI0_60958_CS_CATEGORY_CODE(audio.category_code);
430 switch (audio.rate) {
432 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x3);
435 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x0);
438 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x2);
441 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x8);
444 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xa);
447 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xc);
450 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xe);
454 WREG32(HDMI0_60958_0 + offset, iec);
457 switch (audio.bits_per_sample) {
459 iec |= HDMI0_60958_CS_WORD_LENGTH(0x2);
462 iec |= HDMI0_60958_CS_WORD_LENGTH(0x3);
465 iec |= HDMI0_60958_CS_WORD_LENGTH(0xb);
468 if (audio.status_bits & AUDIO_STATUS_V)
470 WREG32_P(HDMI0_60958_1 + offset, iec, ~0x5000f);
472 err = hdmi_audio_infoframe_init(&frame);
474 DRM_ERROR("failed to setup audio infoframe\n");
478 frame.channels = audio.channels;
480 err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
482 DRM_ERROR("failed to pack audio infoframe\n");
486 r600_hdmi_update_audio_infoframe(encoder, buffer, sizeof(buffer));
487 r600_hdmi_audio_workaround(encoder);
491 * enable the HDMI engine
493 void r600_hdmi_enable(struct drm_encoder *encoder, bool enable)
495 struct drm_device *dev = encoder->dev;
496 struct radeon_device *rdev = dev->dev_private;
497 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
498 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
499 u32 hdmi = HDMI0_ERROR_ACK;
501 if (!dig || !dig->afmt)
504 /* Silent, r600_hdmi_enable will raise WARN for us */
505 if (enable && dig->afmt->enabled)
507 if (!enable && !dig->afmt->enabled)
510 /* Older chipsets require setting HDMI and routing manually */
511 if (!ASIC_IS_DCE3(rdev)) {
513 hdmi |= HDMI0_ENABLE;
514 switch (radeon_encoder->encoder_id) {
515 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
517 WREG32_OR(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN);
518 hdmi |= HDMI0_STREAM(HDMI0_STREAM_TMDSA);
520 WREG32_AND(AVIVO_TMDSA_CNTL, ~AVIVO_TMDSA_CNTL_HDMI_EN);
523 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
525 WREG32_OR(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN);
526 hdmi |= HDMI0_STREAM(HDMI0_STREAM_LVTMA);
528 WREG32_AND(AVIVO_LVTMA_CNTL, ~AVIVO_LVTMA_CNTL_HDMI_EN);
531 case ENCODER_OBJECT_ID_INTERNAL_DDI:
533 WREG32_OR(DDIA_CNTL, DDIA_HDMI_EN);
534 hdmi |= HDMI0_STREAM(HDMI0_STREAM_DDIA);
536 WREG32_AND(DDIA_CNTL, ~DDIA_HDMI_EN);
539 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
541 hdmi |= HDMI0_STREAM(HDMI0_STREAM_DVOA);
544 dev_err(rdev->dev, "Invalid encoder for HDMI: 0x%X\n",
545 radeon_encoder->encoder_id);
548 WREG32(HDMI0_CONTROL + dig->afmt->offset, hdmi);
551 if (rdev->irq.installed) {
552 /* if irq is available use it */
553 /* XXX: shouldn't need this on any asics. Double check DCE2/3 */
555 radeon_irq_kms_enable_afmt(rdev, dig->afmt->id);
557 radeon_irq_kms_disable_afmt(rdev, dig->afmt->id);
560 dig->afmt->enabled = enable;
562 DRM_DEBUG("%sabling HDMI interface @ 0x%04X for encoder 0x%x\n",
563 enable ? "En" : "Dis", dig->afmt->offset, radeon_encoder->encoder_id);