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>
28 #include <drm/radeon_drm.h>
30 #include "radeon_asic.h"
37 enum r600_hdmi_color_format {
44 * IEC60958 status bits
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
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 */
74 * calculate CTS value if it's not found in the table
76 static void r600_hdmi_calc_cts(uint32_t clock, int *CTS, int N, int freq)
79 *CTS = clock * N / (128 * freq) * 1000;
80 DRM_DEBUG("Using ACR timing N=%d CTS=%d for frequency %d\n",
84 struct radeon_hdmi_acr r600_hdmi_acr(uint32_t clock)
86 struct radeon_hdmi_acr res;
89 for (i = 0; r600_hdmi_predefined_acr[i].clock != clock &&
90 r600_hdmi_predefined_acr[i].clock != 0; i++)
92 res = r600_hdmi_predefined_acr[i];
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);
103 * update the N and CTS parameters for a given pixel clock rate
105 static void r600_hdmi_update_ACR(struct drm_encoder *encoder, uint32_t clock)
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;
114 WREG32(HDMI0_ACR_32_0 + offset, HDMI0_ACR_CTS_32(acr.cts_32khz));
115 WREG32(HDMI0_ACR_32_1 + offset, acr.n_32khz);
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);
120 WREG32(HDMI0_ACR_48_0 + offset, HDMI0_ACR_CTS_48(acr.cts_48khz));
121 WREG32(HDMI0_ACR_48_1 + offset, acr.n_48khz);
125 * build a HDMI Video Info Frame
127 static void r600_hdmi_update_avi_infoframe(struct drm_encoder *encoder,
128 void *buffer, size_t size)
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 = buffer + 3;
137 /* Our header values (type, version, length) should be alright, Intel
138 * is using the same. Checksum function also seems to be OK, it works
139 * fine for audio infoframe. However calculated value is always lower
140 * by 2 in comparison to fglrx. It breaks displaying anything in case
141 * of TVs that strictly check the checksum. Hack it manually here to
142 * workaround this issue. */
145 WREG32(HDMI0_AVI_INFO0 + offset,
146 frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
147 WREG32(HDMI0_AVI_INFO1 + offset,
148 frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x7] << 24));
149 WREG32(HDMI0_AVI_INFO2 + offset,
150 frame[0x8] | (frame[0x9] << 8) | (frame[0xA] << 16) | (frame[0xB] << 24));
151 WREG32(HDMI0_AVI_INFO3 + offset,
152 frame[0xC] | (frame[0xD] << 8));
156 * build a Audio Info Frame
158 static void r600_hdmi_update_audio_infoframe(struct drm_encoder *encoder,
159 const 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 const u8 *frame = buffer + 3;
168 WREG32(HDMI0_AUDIO_INFO0 + offset,
169 frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
170 WREG32(HDMI0_AUDIO_INFO1 + offset,
171 frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x8] << 24));
175 * test if audio buffer is filled enough to start playing
177 static bool r600_hdmi_is_audio_buffer_filled(struct drm_encoder *encoder)
179 struct drm_device *dev = encoder->dev;
180 struct radeon_device *rdev = dev->dev_private;
181 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
182 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
183 uint32_t offset = dig->afmt->offset;
185 return (RREG32(HDMI0_STATUS + offset) & 0x10) != 0;
189 * have buffer status changed since last call?
191 int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder)
193 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
194 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
197 if (!dig->afmt || !dig->afmt->enabled)
200 status = r600_hdmi_is_audio_buffer_filled(encoder);
201 result = dig->afmt->last_buffer_filled_status != status;
202 dig->afmt->last_buffer_filled_status = status;
208 * write the audio workaround status to the hardware
210 static void r600_hdmi_audio_workaround(struct drm_encoder *encoder)
212 struct drm_device *dev = encoder->dev;
213 struct radeon_device *rdev = dev->dev_private;
214 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
215 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
216 uint32_t offset = dig->afmt->offset;
217 bool hdmi_audio_workaround = false; /* FIXME */
220 if (!hdmi_audio_workaround ||
221 r600_hdmi_is_audio_buffer_filled(encoder))
222 value = 0; /* disable workaround */
224 value = HDMI0_AUDIO_TEST_EN; /* enable workaround */
225 WREG32_P(HDMI0_AUDIO_PACKET_CONTROL + offset,
226 value, ~HDMI0_AUDIO_TEST_EN);
229 void r600_audio_set_dto(struct drm_encoder *encoder, u32 clock)
231 struct drm_device *dev = encoder->dev;
232 struct radeon_device *rdev = dev->dev_private;
233 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
234 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
235 u32 base_rate = 24000;
237 if (!dig || !dig->afmt)
240 /* there are two DTOs selected by DCCG_AUDIO_DTO_SELECT.
241 * doesn't matter which one you use. Just use the first one.
243 /* XXX two dtos; generally use dto0 for hdmi */
244 /* Express [24MHz / target pixel clock] as an exact rational
245 * number (coefficient of two integer numbers. DCCG_AUDIO_DTOx_PHASE
246 * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
248 if (ASIC_IS_DCE3(rdev)) {
249 /* according to the reg specs, this should DCE3.2 only, but in
250 * practice it seems to cover DCE3.0 as well.
252 WREG32(DCCG_AUDIO_DTO0_PHASE, base_rate * 100);
253 WREG32(DCCG_AUDIO_DTO0_MODULE, clock * 100);
254 WREG32(DCCG_AUDIO_DTO_SELECT, 0); /* select DTO0 */
256 /* according to the reg specs, this should be DCE2.0 and DCE3.0 */
257 WREG32(AUDIO_DTO, AUDIO_DTO_PHASE(base_rate / 10) |
258 AUDIO_DTO_MODULE(clock / 10));
263 * update the info frames with the data from the current display mode
265 void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode)
267 struct drm_device *dev = encoder->dev;
268 struct radeon_device *rdev = dev->dev_private;
269 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
270 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
271 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
272 struct hdmi_avi_infoframe frame;
276 /* Silent, r600_hdmi_enable will raise WARN for us */
277 if (!dig->afmt->enabled)
279 offset = dig->afmt->offset;
281 r600_audio_set_dto(encoder, mode->clock);
283 WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
284 HDMI0_NULL_SEND); /* send null packets when required */
286 WREG32(HDMI0_AUDIO_CRC_CONTROL + offset, 0x1000);
288 if (ASIC_IS_DCE32(rdev)) {
289 WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,
290 HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */
291 HDMI0_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */
292 WREG32(AFMT_AUDIO_PACKET_CONTROL + offset,
293 AFMT_AUDIO_SAMPLE_SEND | /* send audio packets */
294 AFMT_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
296 WREG32(HDMI0_AUDIO_PACKET_CONTROL + offset,
297 HDMI0_AUDIO_SAMPLE_SEND | /* send audio packets */
298 HDMI0_AUDIO_DELAY_EN(1) | /* default audio delay */
299 HDMI0_AUDIO_PACKETS_PER_LINE(3) | /* should be suffient for all audio modes and small enough for all hblanks */
300 HDMI0_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
303 WREG32(HDMI0_ACR_PACKET_CONTROL + offset,
304 HDMI0_ACR_AUTO_SEND | /* allow hw to sent ACR packets when required */
305 HDMI0_ACR_SOURCE); /* select SW CTS value */
307 WREG32(HDMI0_VBI_PACKET_CONTROL + offset,
308 HDMI0_NULL_SEND | /* send null packets when required */
309 HDMI0_GC_SEND | /* send general control packets */
310 HDMI0_GC_CONT); /* send general control packets every frame */
312 /* TODO: HDMI0_AUDIO_INFO_UPDATE */
313 WREG32(HDMI0_INFOFRAME_CONTROL0 + offset,
314 HDMI0_AVI_INFO_SEND | /* enable AVI info frames */
315 HDMI0_AVI_INFO_CONT | /* send AVI info frames every frame/field */
316 HDMI0_AUDIO_INFO_SEND | /* enable audio info frames (frames won't be set until audio is enabled) */
317 HDMI0_AUDIO_INFO_CONT); /* send audio info frames every frame/field */
319 WREG32(HDMI0_INFOFRAME_CONTROL1 + offset,
320 HDMI0_AVI_INFO_LINE(2) | /* anything other than 0 */
321 HDMI0_AUDIO_INFO_LINE(2)); /* anything other than 0 */
323 WREG32(HDMI0_GC + offset, 0); /* unset HDMI0_GC_AVMUTE */
325 err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
327 DRM_ERROR("failed to setup AVI infoframe: %zd\n", err);
331 err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
333 DRM_ERROR("failed to pack AVI infoframe: %zd\n", err);
337 r600_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));
338 r600_hdmi_update_ACR(encoder, mode->clock);
340 /* it's unknown what these bits do excatly, but it's indeed quite useful for debugging */
341 WREG32(HDMI0_RAMP_CONTROL0 + offset, 0x00FFFFFF);
342 WREG32(HDMI0_RAMP_CONTROL1 + offset, 0x007FFFFF);
343 WREG32(HDMI0_RAMP_CONTROL2 + offset, 0x00000001);
344 WREG32(HDMI0_RAMP_CONTROL3 + offset, 0x00000001);
346 r600_hdmi_audio_workaround(encoder);
350 * update settings with current parameters from audio engine
352 void r600_hdmi_update_audio_settings(struct drm_encoder *encoder)
354 struct drm_device *dev = encoder->dev;
355 struct radeon_device *rdev = dev->dev_private;
356 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
357 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
358 struct r600_audio audio = r600_audio_status(rdev);
359 uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
360 struct hdmi_audio_infoframe frame;
365 if (!dig->afmt || !dig->afmt->enabled)
367 offset = dig->afmt->offset;
369 DRM_DEBUG("%s with %d channels, %d Hz sampling rate, %d bits per sample,\n",
370 r600_hdmi_is_audio_buffer_filled(encoder) ? "playing" : "stopped",
371 audio.channels, audio.rate, audio.bits_per_sample);
372 DRM_DEBUG("0x%02X IEC60958 status bits and 0x%02X category code\n",
373 (int)audio.status_bits, (int)audio.category_code);
376 if (audio.status_bits & AUDIO_STATUS_PROFESSIONAL)
378 if (audio.status_bits & AUDIO_STATUS_NONAUDIO)
380 if (audio.status_bits & AUDIO_STATUS_COPYRIGHT)
382 if (audio.status_bits & AUDIO_STATUS_EMPHASIS)
385 iec |= HDMI0_60958_CS_CATEGORY_CODE(audio.category_code);
387 switch (audio.rate) {
389 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x3);
392 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x0);
395 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x2);
398 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0x8);
401 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xa);
404 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xc);
407 iec |= HDMI0_60958_CS_SAMPLING_FREQUENCY(0xe);
411 WREG32(HDMI0_60958_0 + offset, iec);
414 switch (audio.bits_per_sample) {
416 iec |= HDMI0_60958_CS_WORD_LENGTH(0x2);
419 iec |= HDMI0_60958_CS_WORD_LENGTH(0x3);
422 iec |= HDMI0_60958_CS_WORD_LENGTH(0xb);
425 if (audio.status_bits & AUDIO_STATUS_V)
427 WREG32_P(HDMI0_60958_1 + offset, iec, ~0x5000f);
429 err = hdmi_audio_infoframe_init(&frame);
431 DRM_ERROR("failed to setup audio infoframe\n");
435 frame.channels = audio.channels;
437 err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
439 DRM_ERROR("failed to pack audio infoframe\n");
443 r600_hdmi_update_audio_infoframe(encoder, buffer, sizeof(buffer));
444 r600_hdmi_audio_workaround(encoder);
448 * enable the HDMI engine
450 void r600_hdmi_enable(struct drm_encoder *encoder, bool enable)
452 struct drm_device *dev = encoder->dev;
453 struct radeon_device *rdev = dev->dev_private;
454 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
455 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
456 u32 hdmi = HDMI0_ERROR_ACK;
458 /* Silent, r600_hdmi_enable will raise WARN for us */
459 if (enable && dig->afmt->enabled)
461 if (!enable && !dig->afmt->enabled)
464 /* Older chipsets require setting HDMI and routing manually */
465 if (!ASIC_IS_DCE3(rdev)) {
467 hdmi |= HDMI0_ENABLE;
468 switch (radeon_encoder->encoder_id) {
469 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
471 WREG32_OR(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN);
472 hdmi |= HDMI0_STREAM(HDMI0_STREAM_TMDSA);
474 WREG32_AND(AVIVO_TMDSA_CNTL, ~AVIVO_TMDSA_CNTL_HDMI_EN);
477 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
479 WREG32_OR(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN);
480 hdmi |= HDMI0_STREAM(HDMI0_STREAM_LVTMA);
482 WREG32_AND(AVIVO_LVTMA_CNTL, ~AVIVO_LVTMA_CNTL_HDMI_EN);
485 case ENCODER_OBJECT_ID_INTERNAL_DDI:
487 WREG32_OR(DDIA_CNTL, DDIA_HDMI_EN);
488 hdmi |= HDMI0_STREAM(HDMI0_STREAM_DDIA);
490 WREG32_AND(DDIA_CNTL, ~DDIA_HDMI_EN);
493 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
495 hdmi |= HDMI0_STREAM(HDMI0_STREAM_DVOA);
498 dev_err(rdev->dev, "Invalid encoder for HDMI: 0x%X\n",
499 radeon_encoder->encoder_id);
502 WREG32(HDMI0_CONTROL + dig->afmt->offset, hdmi);
505 if (rdev->irq.installed) {
506 /* if irq is available use it */
507 /* XXX: shouldn't need this on any asics. Double check DCE2/3 */
509 radeon_irq_kms_enable_afmt(rdev, dig->afmt->id);
511 radeon_irq_kms_disable_afmt(rdev, dig->afmt->id);
514 dig->afmt->enabled = enable;
516 DRM_DEBUG("%sabling HDMI interface @ 0x%04X for encoder 0x%x\n",
517 enable ? "En" : "Dis", dig->afmt->offset, radeon_encoder->encoder_id);