drivers/gpu/drm/radeon/r600_audio.c

   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 "radeon_asic.h"
  30 #include "atom.h"
  31
  32 /*
  33  * check if enc_priv stores radeon_encoder_atom_dig
  34  */
  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  */
  58 static int r600_audio_chipset_supported(struct radeon_device *rdev)
  59 {
  60         return (rdev->family >= CHIP_R600 && !ASIC_IS_DCE5(rdev))
  61                 || rdev->family == CHIP_RS600
  62                 || rdev->family == CHIP_RS690
  63                 || rdev->family == CHIP_RS740;
  64 }
  65
  66 /*
  67  * current number of channels
  68  */
  69 int r600_audio_channels(struct radeon_device *rdev)
  70 {
  71         return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
  72 }
  73
  74 /*
  75  * current bits per sample
  76  */
  77 int r600_audio_bits_per_sample(struct radeon_device *rdev)
  78 {
  79         uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
  80         switch (value) {
  81         case 0x0: return  8;
  82         case 0x1: return 16;
  83         case 0x2: return 20;
  84         case 0x3: return 24;
  85         case 0x4: return 32;
  86         }
  87
  88         dev_err(rdev->dev, "Unknown bits per sample 0x%x using 16 instead\n",
  89                 (int)value);
  90
  91         return 16;
  92 }
  93
  94 /*
  95  * current sampling rate in HZ
  96  */
  97 int r600_audio_rate(struct radeon_device *rdev)
  98 {
  99         uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
 100         uint32_t result;
 101
 102         if (value & 0x4000)
 103                 result = 44100;
 104         else
 105                 result = 48000;
 106
 107         result *= ((value >> 11) & 0x7) + 1;
 108         result /= ((value >> 8) & 0x7) + 1;
 109
 110         return result;
 111 }
 112
 113 /*
 114  * iec 60958 status bits
 115  */
 116 uint8_t r600_audio_status_bits(struct radeon_device *rdev)
 117 {
 118         return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
 119 }
 120
 121 /*
 122  * iec 60958 category code
 123  */
 124 uint8_t r600_audio_category_code(struct radeon_device *rdev)
 125 {
 126         return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
 127 }
 128
 129 /*
 130  * update all hdmi interfaces with current audio parameters
 131  */
 132 void r600_audio_update_hdmi(struct work_struct *work)
 133 {
 134         struct radeon_device *rdev = container_of(work, struct radeon_device,
 135                                                   audio_work);
 136         struct drm_device *dev = rdev->ddev;
 137
 138         int channels = r600_audio_channels(rdev);
 139         int rate = r600_audio_rate(rdev);
 140         int bps = r600_audio_bits_per_sample(rdev);
 141         uint8_t status_bits = r600_audio_status_bits(rdev);
 142         uint8_t category_code = r600_audio_category_code(rdev);
 143         struct drm_encoder *encoder;
 144         int changes = 0;
 145
 146         changes |= channels != rdev->audio.channels;
 147         changes |= rate != rdev->audio.rate;
 148         changes |= bps != rdev->audio.bits_per_sample;
 149         changes |= status_bits != rdev->audio.status_bits;
 150         changes |= category_code != rdev->audio.category_code;
 151
 152         if (changes) {
 153                 rdev->audio.channels = channels;
 154                 rdev->audio.rate = rate;
 155                 rdev->audio.bits_per_sample = bps;
 156                 rdev->audio.status_bits = status_bits;
 157                 rdev->audio.category_code = category_code;
 158         }
 159
 160         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 161                 if (!radeon_dig_encoder(encoder))
 162                         continue;
 163                 if (changes || r600_hdmi_buffer_status_changed(encoder))
 164                         r600_hdmi_update_audio_settings(encoder);
 165         }
 166 }
 167
 168 /*
 169  * turn on/off audio engine
 170  */
 171 static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
 172 {
 173         u32 value = 0;
 174         DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
 175         if (ASIC_IS_DCE4(rdev)) {
 176                 if (enable) {
 177                         value |= 0x81000000; /* Required to enable audio */
 178                         value |= 0x0e1000f0; /* fglrx sets that too */
 179                 }
 180                 WREG32(EVERGREEN_AUDIO_ENABLE, value);
 181         } else {
 182                 WREG32_P(R600_AUDIO_ENABLE,
 183                          enable ? 0x81000000 : 0x0, ~0x81000000);
 184         }
 185         rdev->audio.enabled = enable;
 186 }
 187
 188 /*
 189  * initialize the audio vars
 190  */
 191 int r600_audio_init(struct radeon_device *rdev)
 192 {
 193         if (!radeon_audio || !r600_audio_chipset_supported(rdev))
 194                 return 0;
 195
 196         r600_audio_engine_enable(rdev, true);
 197
 198         rdev->audio.channels = -1;
 199         rdev->audio.rate = -1;
 200         rdev->audio.bits_per_sample = -1;
 201         rdev->audio.status_bits = 0;
 202         rdev->audio.category_code = 0;
 203
 204         return 0;
 205 }
 206
 207 /*
 208  * atach the audio codec to the clock source of the encoder
 209  */
 210 void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
 211 {
 212         struct drm_device *dev = encoder->dev;
 213         struct radeon_device *rdev = dev->dev_private;
 214         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 215         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 216         int base_rate = 48000;
 217
 218         switch (radeon_encoder->encoder_id) {
 219         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
 220         case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
 221                 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
 222                 break;
 223         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
 224         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
 225         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
 226         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
 227                 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
 228                 break;
 229         default:
 230                 dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
 231                           radeon_encoder->encoder_id);
 232                 return;
 233         }
 234
 235         if (ASIC_IS_DCE4(rdev)) {
 236                 /* TODO: other PLLs? */
 237                 WREG32(EVERGREEN_AUDIO_PLL1_MUL, base_rate * 10);
 238                 WREG32(EVERGREEN_AUDIO_PLL1_DIV, clock * 10);
 239                 WREG32(EVERGREEN_AUDIO_PLL1_UNK, 0x00000071);
 240
 241                 /* Some magic trigger or src sel? */
 242                 WREG32_P(0x5ac, 0x01, ~0x77);
 243         } else {
 244                 switch (dig->dig_encoder) {
 245                 case 0:
 246                         WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
 247                         WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
 248                         WREG32(R600_AUDIO_CLK_SRCSEL, 0);
 249                         break;
 250
 251                 case 1:
 252                         WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
 253                         WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
 254                         WREG32(R600_AUDIO_CLK_SRCSEL, 1);
 255                         break;
 256                 default:
 257                         dev_err(rdev->dev,
 258                                 "Unsupported DIG on encoder 0x%02X\n",
 259                                 radeon_encoder->encoder_id);
 260                         return;
 261                 }
 262         }
 263 }
 264
 265 /*
 266  * release the audio timer
 267  * TODO: How to do this correctly on SMP systems?
 268  */
 269 void r600_audio_fini(struct radeon_device *rdev)
 270 {
 271         if (!rdev->audio.enabled)
 272                 return;
 273
 274         r600_audio_engine_enable(rdev, false);
 275 }