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"
31 #define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */
34 * check if the chipset is supported
36 static int r600_audio_chipset_supported(struct radeon_device *rdev)
38 return (rdev->family >= CHIP_R600 && rdev->family < CHIP_CEDAR)
39 || rdev->family == CHIP_RS600
40 || rdev->family == CHIP_RS690
41 || rdev->family == CHIP_RS740;
45 * current number of channels
47 int r600_audio_channels(struct radeon_device *rdev)
49 return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
53 * current bits per sample
55 int r600_audio_bits_per_sample(struct radeon_device *rdev)
57 uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
66 dev_err(rdev->dev, "Unknown bits per sample 0x%x using 16 instead\n",
73 * current sampling rate in HZ
75 int r600_audio_rate(struct radeon_device *rdev)
77 uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
85 result *= ((value >> 11) & 0x7) + 1;
86 result /= ((value >> 8) & 0x7) + 1;
92 * iec 60958 status bits
94 uint8_t r600_audio_status_bits(struct radeon_device *rdev)
96 return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
100 * iec 60958 category code
102 uint8_t r600_audio_category_code(struct radeon_device *rdev)
104 return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
108 * schedule next audio update event
110 void r600_audio_schedule_polling(struct radeon_device *rdev)
112 mod_timer(&rdev->audio_timer,
113 jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
117 * update all hdmi interfaces with current audio parameters
119 static void r600_audio_update_hdmi(unsigned long param)
121 struct radeon_device *rdev = (struct radeon_device *)param;
122 struct drm_device *dev = rdev->ddev;
124 int channels = r600_audio_channels(rdev);
125 int rate = r600_audio_rate(rdev);
126 int bps = r600_audio_bits_per_sample(rdev);
127 uint8_t status_bits = r600_audio_status_bits(rdev);
128 uint8_t category_code = r600_audio_category_code(rdev);
130 struct drm_encoder *encoder;
131 int changes = 0, still_going = 0;
133 changes |= channels != rdev->audio_channels;
134 changes |= rate != rdev->audio_rate;
135 changes |= bps != rdev->audio_bits_per_sample;
136 changes |= status_bits != rdev->audio_status_bits;
137 changes |= category_code != rdev->audio_category_code;
140 rdev->audio_channels = channels;
141 rdev->audio_rate = rate;
142 rdev->audio_bits_per_sample = bps;
143 rdev->audio_status_bits = status_bits;
144 rdev->audio_category_code = category_code;
147 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
148 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
149 still_going |= radeon_encoder->audio_polling_active;
150 if (changes || r600_hdmi_buffer_status_changed(encoder))
151 r600_hdmi_update_audio_settings(encoder);
155 r600_audio_schedule_polling(rdev);
159 * turn on/off audio engine
161 static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
163 DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
164 WREG32_P(R600_AUDIO_ENABLE, enable ? 0x81000000 : 0x0, ~0x81000000);
165 rdev->audio_enabled = enable;
169 * initialize the audio vars and register the update timer
171 int r600_audio_init(struct radeon_device *rdev)
173 if (!radeon_audio || !r600_audio_chipset_supported(rdev))
176 r600_audio_engine_enable(rdev, true);
178 rdev->audio_channels = -1;
179 rdev->audio_rate = -1;
180 rdev->audio_bits_per_sample = -1;
181 rdev->audio_status_bits = 0;
182 rdev->audio_category_code = 0;
186 r600_audio_update_hdmi,
187 (unsigned long)rdev);
193 * enable the polling timer, to check for status changes
195 void r600_audio_enable_polling(struct drm_encoder *encoder)
197 struct drm_device *dev = encoder->dev;
198 struct radeon_device *rdev = dev->dev_private;
199 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
201 DRM_DEBUG("r600_audio_enable_polling: %d\n",
202 radeon_encoder->audio_polling_active);
203 if (radeon_encoder->audio_polling_active)
206 radeon_encoder->audio_polling_active = 1;
207 if (rdev->audio_enabled)
208 mod_timer(&rdev->audio_timer, jiffies + 1);
212 * disable the polling timer, so we get no more status updates
214 void r600_audio_disable_polling(struct drm_encoder *encoder)
216 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
217 DRM_DEBUG("r600_audio_disable_polling: %d\n",
218 radeon_encoder->audio_polling_active);
219 radeon_encoder->audio_polling_active = 0;
223 * atach the audio codec to the clock source of the encoder
225 void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
227 struct drm_device *dev = encoder->dev;
228 struct radeon_device *rdev = dev->dev_private;
229 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
230 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
231 int base_rate = 48000;
233 switch (radeon_encoder->encoder_id) {
234 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
235 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
236 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
238 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
239 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
240 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
241 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
242 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
245 dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
246 radeon_encoder->encoder_id);
250 switch (dig->dig_encoder) {
252 WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
253 WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
254 WREG32(R600_AUDIO_CLK_SRCSEL, 0);
258 WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
259 WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
260 WREG32(R600_AUDIO_CLK_SRCSEL, 1);
263 dev_err(rdev->dev, "Unsupported DIG on encoder 0x%02X\n",
264 radeon_encoder->encoder_id);
270 * release the audio timer
271 * TODO: How to do this correctly on SMP systems?
273 void r600_audio_fini(struct radeon_device *rdev)
275 if (!rdev->audio_enabled)
278 del_timer(&rdev->audio_timer);
280 r600_audio_engine_enable(rdev, false);