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
28 #include "radeon_reg.h"
29 #include "radeon_asic.h"
32 #define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */
35 * check if the chipset is supported
37 static int r600_audio_chipset_supported(struct radeon_device *rdev)
39 return (rdev->family >= CHIP_R600 && rdev->family < CHIP_CEDAR)
40 || rdev->family == CHIP_RS600
41 || rdev->family == CHIP_RS690
42 || rdev->family == CHIP_RS740;
46 * current number of channels
48 int r600_audio_channels(struct radeon_device *rdev)
50 return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
54 * current bits per sample
56 int r600_audio_bits_per_sample(struct radeon_device *rdev)
58 uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
67 dev_err(rdev->dev, "Unknown bits per sample 0x%x using 16 instead\n",
74 * current sampling rate in HZ
76 int r600_audio_rate(struct radeon_device *rdev)
78 uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
86 result *= ((value >> 11) & 0x7) + 1;
87 result /= ((value >> 8) & 0x7) + 1;
93 * iec 60958 status bits
95 uint8_t r600_audio_status_bits(struct radeon_device *rdev)
97 return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
101 * iec 60958 category code
103 uint8_t r600_audio_category_code(struct radeon_device *rdev)
105 return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
109 * schedule next audio update event
111 void r600_audio_schedule_polling(struct radeon_device *rdev)
113 mod_timer(&rdev->audio_timer,
114 jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
118 * update all hdmi interfaces with current audio parameters
120 static void r600_audio_update_hdmi(unsigned long param)
122 struct radeon_device *rdev = (struct radeon_device *)param;
123 struct drm_device *dev = rdev->ddev;
125 int channels = r600_audio_channels(rdev);
126 int rate = r600_audio_rate(rdev);
127 int bps = r600_audio_bits_per_sample(rdev);
128 uint8_t status_bits = r600_audio_status_bits(rdev);
129 uint8_t category_code = r600_audio_category_code(rdev);
131 struct drm_encoder *encoder;
132 int changes = 0, still_going = 0;
134 changes |= channels != rdev->audio_channels;
135 changes |= rate != rdev->audio_rate;
136 changes |= bps != rdev->audio_bits_per_sample;
137 changes |= status_bits != rdev->audio_status_bits;
138 changes |= category_code != rdev->audio_category_code;
141 rdev->audio_channels = channels;
142 rdev->audio_rate = rate;
143 rdev->audio_bits_per_sample = bps;
144 rdev->audio_status_bits = status_bits;
145 rdev->audio_category_code = category_code;
148 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
149 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
150 still_going |= radeon_encoder->audio_polling_active;
151 if (changes || r600_hdmi_buffer_status_changed(encoder))
152 r600_hdmi_update_audio_settings(encoder);
156 r600_audio_schedule_polling(rdev);
160 * turn on/off audio engine
162 static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
164 DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
165 WREG32_P(R600_AUDIO_ENABLE, enable ? 0x81000000 : 0x0, ~0x81000000);
166 rdev->audio_enabled = enable;
170 * initialize the audio vars and register the update timer
172 int r600_audio_init(struct radeon_device *rdev)
174 if (!radeon_audio || !r600_audio_chipset_supported(rdev))
177 r600_audio_engine_enable(rdev, true);
179 rdev->audio_channels = -1;
180 rdev->audio_rate = -1;
181 rdev->audio_bits_per_sample = -1;
182 rdev->audio_status_bits = 0;
183 rdev->audio_category_code = 0;
187 r600_audio_update_hdmi,
188 (unsigned long)rdev);
194 * enable the polling timer, to check for status changes
196 void r600_audio_enable_polling(struct drm_encoder *encoder)
198 struct drm_device *dev = encoder->dev;
199 struct radeon_device *rdev = dev->dev_private;
200 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
202 DRM_DEBUG("r600_audio_enable_polling: %d\n",
203 radeon_encoder->audio_polling_active);
204 if (radeon_encoder->audio_polling_active)
207 radeon_encoder->audio_polling_active = 1;
208 if (rdev->audio_enabled)
209 mod_timer(&rdev->audio_timer, jiffies + 1);
213 * disable the polling timer, so we get no more status updates
215 void r600_audio_disable_polling(struct drm_encoder *encoder)
217 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
218 DRM_DEBUG("r600_audio_disable_polling: %d\n",
219 radeon_encoder->audio_polling_active);
220 radeon_encoder->audio_polling_active = 0;
224 * atach the audio codec to the clock source of the encoder
226 void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
228 struct drm_device *dev = encoder->dev;
229 struct radeon_device *rdev = dev->dev_private;
230 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
231 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
232 int base_rate = 48000;
234 switch (radeon_encoder->encoder_id) {
235 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
236 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
237 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
239 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
240 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
241 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
242 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
243 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
246 dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
247 radeon_encoder->encoder_id);
251 switch (dig->dig_encoder) {
253 WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
254 WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
255 WREG32(R600_AUDIO_CLK_SRCSEL, 0);
259 WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
260 WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
261 WREG32(R600_AUDIO_CLK_SRCSEL, 1);
264 dev_err(rdev->dev, "Unsupported DIG on encoder 0x%02X\n",
265 radeon_encoder->encoder_id);
271 * release the audio timer
272 * TODO: How to do this correctly on SMP systems?
274 void r600_audio_fini(struct radeon_device *rdev)
276 if (!rdev->audio_enabled)
279 del_timer(&rdev->audio_timer);
281 r600_audio_engine_enable(rdev, false);