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);