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 <drm/drmP.h>
27 #include "radeon.h"
28 #include "radeon_reg.h"
29 #include "radeon_asic.h"
30 #include "atom.h"
31
32 /*
33 * check if enc_priv stores radeon_encoder_atom_dig
34 */
radeon_dig_encoder(struct drm_encoder * encoder)35 static bool radeon_dig_encoder(struct drm_encoder *encoder)
36 {
37 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
38 switch (radeon_encoder->encoder_id) {
39 case ENCODER_OBJECT_ID_INTERNAL_LVDS:
40 case ENCODER_OBJECT_ID_INTERNAL_TMDS1:
41 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
42 case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
43 case ENCODER_OBJECT_ID_INTERNAL_DVO1:
44 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
45 case ENCODER_OBJECT_ID_INTERNAL_DDI:
46 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
47 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
48 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
49 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
50 return true;
51 }
52 return false;
53 }
54
55 /*
56 * check if the chipset is supported
57 */
r600_audio_chipset_supported(struct radeon_device * rdev)58 static int r600_audio_chipset_supported(struct radeon_device *rdev)
59 {
60 return ASIC_IS_DCE2(rdev) && !ASIC_IS_DCE6(rdev);
61 }
62
r600_audio_status(struct radeon_device * rdev)63 struct r600_audio r600_audio_status(struct radeon_device *rdev)
64 {
65 struct r600_audio status;
66 uint32_t value;
67
68 value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
69
70 /* number of channels */
71 status.channels = (value & 0x7) + 1;
72
73 /* bits per sample */
74 switch ((value & 0xF0) >> 4) {
75 case 0x0:
76 status.bits_per_sample = 8;
77 break;
78 case 0x1:
79 status.bits_per_sample = 16;
80 break;
81 case 0x2:
82 status.bits_per_sample = 20;
83 break;
84 case 0x3:
85 status.bits_per_sample = 24;
86 break;
87 case 0x4:
88 status.bits_per_sample = 32;
89 break;
90 default:
91 dev_err(rdev->dev, "Unknown bits per sample 0x%x, using 16\n",
92 (int)value);
93 status.bits_per_sample = 16;
94 }
95
96 /* current sampling rate in HZ */
97 if (value & 0x4000)
98 status.rate = 44100;
99 else
100 status.rate = 48000;
101 status.rate *= ((value >> 11) & 0x7) + 1;
102 status.rate /= ((value >> 8) & 0x7) + 1;
103
104 value = RREG32(R600_AUDIO_STATUS_BITS);
105
106 /* iec 60958 status bits */
107 status.status_bits = value & 0xff;
108
109 /* iec 60958 category code */
110 status.category_code = (value >> 8) & 0xff;
111
112 return status;
113 }
114
115 /*
116 * update all hdmi interfaces with current audio parameters
117 */
r600_audio_update_hdmi(struct work_struct * work)118 void r600_audio_update_hdmi(struct work_struct *work)
119 {
120 struct radeon_device *rdev = container_of(work, struct radeon_device,
121 audio_work);
122 struct drm_device *dev = rdev->ddev;
123 struct r600_audio audio_status = r600_audio_status(rdev);
124 struct drm_encoder *encoder;
125 bool changed = false;
126
127 if (rdev->audio_status.channels != audio_status.channels ||
128 rdev->audio_status.rate != audio_status.rate ||
129 rdev->audio_status.bits_per_sample != audio_status.bits_per_sample ||
130 rdev->audio_status.status_bits != audio_status.status_bits ||
131 rdev->audio_status.category_code != audio_status.category_code) {
132 rdev->audio_status = audio_status;
133 changed = true;
134 }
135
136 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
137 if (!radeon_dig_encoder(encoder))
138 continue;
139 if (changed || r600_hdmi_buffer_status_changed(encoder))
140 r600_hdmi_update_audio_settings(encoder);
141 }
142 }
143
144 /*
145 * turn on/off audio engine
146 */
r600_audio_engine_enable(struct radeon_device * rdev,bool enable)147 static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
148 {
149 u32 value = 0;
150 DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
151 if (ASIC_IS_DCE4(rdev)) {
152 if (enable) {
153 value |= 0x81000000; /* Required to enable audio */
154 value |= 0x0e1000f0; /* fglrx sets that too */
155 }
156 WREG32(EVERGREEN_AUDIO_ENABLE, value);
157 } else {
158 WREG32_P(R600_AUDIO_ENABLE,
159 enable ? 0x81000000 : 0x0, ~0x81000000);
160 }
161 rdev->audio_enabled = enable;
162 }
163
164 /*
165 * initialize the audio vars
166 */
r600_audio_init(struct radeon_device * rdev)167 int r600_audio_init(struct radeon_device *rdev)
168 {
169 if (!radeon_audio || !r600_audio_chipset_supported(rdev))
170 return 0;
171
172 r600_audio_engine_enable(rdev, true);
173
174 rdev->audio_status.channels = -1;
175 rdev->audio_status.rate = -1;
176 rdev->audio_status.bits_per_sample = -1;
177 rdev->audio_status.status_bits = 0;
178 rdev->audio_status.category_code = 0;
179
180 return 0;
181 }
182
183 /*
184 * release the audio timer
185 * TODO: How to do this correctly on SMP systems?
186 */
r600_audio_fini(struct radeon_device * rdev)187 void r600_audio_fini(struct radeon_device *rdev)
188 {
189 if (!rdev->audio_enabled)
190 return;
191
192 r600_audio_engine_enable(rdev, false);
193 }
194