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 <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  */
  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_DCE6(rdev))
  61                 || rdev->family == CHIP_RS600
  62                 || rdev->family == CHIP_RS690
  63                 || rdev->family == CHIP_RS740;
  64 }
  65
  66 struct r600_audio r600_audio_status(struct radeon_device *rdev)
  67 {
  68         struct r600_audio status;
  69         uint32_t value;
  70
  71         value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
  72
  73         /* number of channels */
  74         status.channels = (value & 0x7) + 1;
  75
  76         /* bits per sample */
  77         switch ((value & 0xF0) >> 4) {
  78         case 0x0:
  79                 status.bits_per_sample = 8;
  80                 break;
  81         case 0x1:
  82                 status.bits_per_sample = 16;
  83                 break;
  84         case 0x2:
  85                 status.bits_per_sample = 20;
  86                 break;
  87         case 0x3:
  88                 status.bits_per_sample = 24;
  89                 break;
  90         case 0x4:
  91                 status.bits_per_sample = 32;
  92                 break;
  93         default:
  94                 dev_err(rdev->dev, "Unknown bits per sample 0x%x, using 16\n",
  95                         (int)value);
  96                 status.bits_per_sample = 16;
  97         }
  98
  99         /* current sampling rate in HZ */
 100         if (value & 0x4000)
 101                 status.rate = 44100;
 102         else
 103                 status.rate = 48000;
 104         status.rate *= ((value >> 11) & 0x7) + 1;
 105         status.rate /= ((value >> 8) & 0x7) + 1;
 106
 107         value = RREG32(R600_AUDIO_STATUS_BITS);
 108
 109         /* iec 60958 status bits */
 110         status.status_bits = value & 0xff;
 111
 112         /* iec 60958 category code */
 113         status.category_code = (value >> 8) & 0xff;
 114
 115         return status;
 116 }
 117
 118 /*
 119  * update all hdmi interfaces with current audio parameters
 120  */
 121 void r600_audio_update_hdmi(struct work_struct *work)
 122 {
 123         struct radeon_device *rdev = container_of(work, struct radeon_device,
 124                                                   audio_work);
 125         struct drm_device *dev = rdev->ddev;
 126         struct r600_audio audio_status = r600_audio_status(rdev);
 127         struct drm_encoder *encoder;
 128         bool changed = false;
 129
 130         if (rdev->audio_status.channels != audio_status.channels ||
 131             rdev->audio_status.rate != audio_status.rate ||
 132             rdev->audio_status.bits_per_sample != audio_status.bits_per_sample ||
 133             rdev->audio_status.status_bits != audio_status.status_bits ||
 134             rdev->audio_status.category_code != audio_status.category_code) {
 135                 rdev->audio_status = audio_status;
 136                 changed = true;
 137         }
 138
 139         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 140                 if (!radeon_dig_encoder(encoder))
 141                         continue;
 142                 if (changed || r600_hdmi_buffer_status_changed(encoder))
 143                         r600_hdmi_update_audio_settings(encoder);
 144         }
 145 }
 146
 147 /*
 148  * turn on/off audio engine
 149  */
 150 static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
 151 {
 152         u32 value = 0;
 153         DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
 154         if (ASIC_IS_DCE4(rdev)) {
 155                 if (enable) {
 156                         value |= 0x81000000; /* Required to enable audio */
 157                         value |= 0x0e1000f0; /* fglrx sets that too */
 158                 }
 159                 WREG32(EVERGREEN_AUDIO_ENABLE, value);
 160         } else {
 161                 WREG32_P(R600_AUDIO_ENABLE,
 162                          enable ? 0x81000000 : 0x0, ~0x81000000);
 163         }
 164         rdev->audio_enabled = enable;
 165 }
 166
 167 /*
 168  * initialize the audio vars
 169  */
 170 int r600_audio_init(struct radeon_device *rdev)
 171 {
 172         if (!radeon_audio || !r600_audio_chipset_supported(rdev))
 173                 return 0;
 174
 175         r600_audio_engine_enable(rdev, true);
 176
 177         rdev->audio_status.channels = -1;
 178         rdev->audio_status.rate = -1;
 179         rdev->audio_status.bits_per_sample = -1;
 180         rdev->audio_status.status_bits = 0;
 181         rdev->audio_status.category_code = 0;
 182
 183         return 0;
 184 }
 185
 186 /*
 187  * atach the audio codec to the clock source of the encoder
 188  */
 189 void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
 190 {
 191         struct drm_device *dev = encoder->dev;
 192         struct radeon_device *rdev = dev->dev_private;
 193         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 194         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 195         struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
 196         int base_rate = 48000;
 197
 198         switch (radeon_encoder->encoder_id) {
 199         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
 200         case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
 201                 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
 202                 break;
 203         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
 204         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
 205         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
 206         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
 207                 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
 208                 break;
 209         default:
 210                 dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
 211                           radeon_encoder->encoder_id);
 212                 return;
 213         }
 214
 215         if (ASIC_IS_DCE4(rdev)) {
 216                 /* TODO: other PLLs? */
 217                 WREG32(EVERGREEN_AUDIO_PLL1_MUL, base_rate * 10);
 218                 WREG32(EVERGREEN_AUDIO_PLL1_DIV, clock * 10);
 219                 WREG32(EVERGREEN_AUDIO_PLL1_UNK, 0x00000071);
 220
 221                 /* Select DTO source */
 222                 WREG32(0x5ac, radeon_crtc->crtc_id);
 223         } else {
 224                 switch (dig->dig_encoder) {
 225                 case 0:
 226                         WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
 227                         WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
 228                         WREG32(R600_AUDIO_CLK_SRCSEL, 0);
 229                         break;
 230
 231                 case 1:
 232                         WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
 233                         WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
 234                         WREG32(R600_AUDIO_CLK_SRCSEL, 1);
 235                         break;
 236                 default:
 237                         dev_err(rdev->dev,
 238                                 "Unsupported DIG on encoder 0x%02X\n",
 239                                 radeon_encoder->encoder_id);
 240                         return;
 241                 }
 242         }
 243 }
 244
 245 /*
 246  * release the audio timer
 247  * TODO: How to do this correctly on SMP systems?
 248  */
 249 void r600_audio_fini(struct radeon_device *rdev)
 250 {
 251         if (!rdev->audio_enabled)
 252                 return;
 253
 254         r600_audio_engine_enable(rdev, false);
 255 }