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Diffstat (limited to 'drivers/gpu/drm/radeon/r600_audio.c')
-rw-r--r--drivers/gpu/drm/radeon/r600_audio.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r600_audio.c b/drivers/gpu/drm/radeon/r600_audio.c
new file mode 100644
index 000000000000..99e2c3891a7d
--- /dev/null
+++ b/drivers/gpu/drm/radeon/r600_audio.c
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1/*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Christian König.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Authors: Christian König
25 */
26#include "drmP.h"
27#include "radeon.h"
28#include "radeon_reg.h"
29#include "atom.h"
30
31#define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */
32
33/*
34 * check if the chipset is supported
35 */
36static int r600_audio_chipset_supported(struct radeon_device *rdev)
37{
38 return rdev->family >= CHIP_R600
39 || rdev->family == CHIP_RS600
40 || rdev->family == CHIP_RS690
41 || rdev->family == CHIP_RS740;
42}
43
44/*
45 * current number of channels
46 */
47static int r600_audio_channels(struct radeon_device *rdev)
48{
49 return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
50}
51
52/*
53 * current bits per sample
54 */
55static int r600_audio_bits_per_sample(struct radeon_device *rdev)
56{
57 uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
58 switch (value) {
59 case 0x0: return 8;
60 case 0x1: return 16;
61 case 0x2: return 20;
62 case 0x3: return 24;
63 case 0x4: return 32;
64 }
65
66 DRM_ERROR("Unknown bits per sample 0x%x using 16 instead.\n", (int)value);
67
68 return 16;
69}
70
71/*
72 * current sampling rate in HZ
73 */
74static int r600_audio_rate(struct radeon_device *rdev)
75{
76 uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
77 uint32_t result;
78
79 if (value & 0x4000)
80 result = 44100;
81 else
82 result = 48000;
83
84 result *= ((value >> 11) & 0x7) + 1;
85 result /= ((value >> 8) & 0x7) + 1;
86
87 return result;
88}
89
90/*
91 * iec 60958 status bits
92 */
93static uint8_t r600_audio_status_bits(struct radeon_device *rdev)
94{
95 return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
96}
97
98/*
99 * iec 60958 category code
100 */
101static uint8_t r600_audio_category_code(struct radeon_device *rdev)
102{
103 return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
104}
105
106/*
107 * update all hdmi interfaces with current audio parameters
108 */
109static void r600_audio_update_hdmi(unsigned long param)
110{
111 struct radeon_device *rdev = (struct radeon_device *)param;
112 struct drm_device *dev = rdev->ddev;
113
114 int channels = r600_audio_channels(rdev);
115 int rate = r600_audio_rate(rdev);
116 int bps = r600_audio_bits_per_sample(rdev);
117 uint8_t status_bits = r600_audio_status_bits(rdev);
118 uint8_t category_code = r600_audio_category_code(rdev);
119
120 struct drm_encoder *encoder;
121 int changes = 0;
122
123 changes |= channels != rdev->audio_channels;
124 changes |= rate != rdev->audio_rate;
125 changes |= bps != rdev->audio_bits_per_sample;
126 changes |= status_bits != rdev->audio_status_bits;
127 changes |= category_code != rdev->audio_category_code;
128
129 if (changes) {
130 rdev->audio_channels = channels;
131 rdev->audio_rate = rate;
132 rdev->audio_bits_per_sample = bps;
133 rdev->audio_status_bits = status_bits;
134 rdev->audio_category_code = category_code;
135 }
136
137 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
138 if (changes || r600_hdmi_buffer_status_changed(encoder))
139 r600_hdmi_update_audio_settings(
140 encoder, channels,
141 rate, bps, status_bits,
142 category_code);
143 }
144
145 mod_timer(&rdev->audio_timer,
146 jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
147}
148
149/*
150 * initialize the audio vars and register the update timer
151 */
152int r600_audio_init(struct radeon_device *rdev)
153{
154 if (!r600_audio_chipset_supported(rdev))
155 return 0;
156
157 DRM_INFO("%s audio support", radeon_audio ? "Enabling" : "Disabling");
158 WREG32_P(R600_AUDIO_ENABLE, radeon_audio ? 0x81000000 : 0x0, ~0x81000000);
159
160 rdev->audio_channels = -1;
161 rdev->audio_rate = -1;
162 rdev->audio_bits_per_sample = -1;
163 rdev->audio_status_bits = 0;
164 rdev->audio_category_code = 0;
165
166 setup_timer(
167 &rdev->audio_timer,
168 r600_audio_update_hdmi,
169 (unsigned long)rdev);
170
171 mod_timer(&rdev->audio_timer, jiffies + 1);
172
173 return 0;
174}
175
176/*
177 * determin how the encoders and audio interface is wired together
178 */
179int r600_audio_tmds_index(struct drm_encoder *encoder)
180{
181 struct drm_device *dev = encoder->dev;
182 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
183 struct drm_encoder *other;
184
185 switch (radeon_encoder->encoder_id) {
186 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
187 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
188 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
189 return 0;
190
191 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
192 /* special case check if an TMDS1 is present */
193 list_for_each_entry(other, &dev->mode_config.encoder_list, head) {
194 if (to_radeon_encoder(other)->encoder_id ==
195 ENCODER_OBJECT_ID_INTERNAL_TMDS1)
196 return 1;
197 }
198 return 0;
199
200 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
201 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
202 return 1;
203
204 default:
205 DRM_ERROR("Unsupported encoder type 0x%02X\n",
206 radeon_encoder->encoder_id);
207 return -1;
208 }
209}
210
211/*
212 * atach the audio codec to the clock source of the encoder
213 */
214void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
215{
216 struct drm_device *dev = encoder->dev;
217 struct radeon_device *rdev = dev->dev_private;
218 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
219 int base_rate = 48000;
220
221 switch (radeon_encoder->encoder_id) {
222 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
223 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
224 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
225 break;
226
227 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
228 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
229 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
230 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
231 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
232 break;
233
234 default:
235 DRM_ERROR("Unsupported encoder type 0x%02X\n",
236 radeon_encoder->encoder_id);
237 return;
238 }
239
240 switch (r600_audio_tmds_index(encoder)) {
241 case 0:
242 WREG32(R600_AUDIO_PLL1_MUL, base_rate*50);
243 WREG32(R600_AUDIO_PLL1_DIV, clock*100);
244 WREG32(R600_AUDIO_CLK_SRCSEL, 0);
245 break;
246
247 case 1:
248 WREG32(R600_AUDIO_PLL2_MUL, base_rate*50);
249 WREG32(R600_AUDIO_PLL2_DIV, clock*100);
250 WREG32(R600_AUDIO_CLK_SRCSEL, 1);
251 break;
252 }
253}
254
255/*
256 * release the audio timer
257 * TODO: How to do this correctly on SMP systems?
258 */
259void r600_audio_fini(struct radeon_device *rdev)
260{
261 if (!r600_audio_chipset_supported(rdev))
262 return;
263
264 WREG32_P(R600_AUDIO_ENABLE, 0x0, ~0x81000000);
265
266 del_timer(&rdev->audio_timer);
267}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 23:50:00 -0500