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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.  */
  36. static 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.  */
  47. static 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.  */
  55. static 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.  */
  74. static 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.  */
  93. static 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.  */
  101. static 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.  */
  109. static 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.  * turn on/off audio engine
  151.  */
  152. static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
  153. {
  154.         DRM_INFO("%s audio support", enable ? "Enabling" : "Disabling");
  155.         WREG32_P(R600_AUDIO_ENABLE, enable ? 0x81000000 : 0x0, ~0x81000000);
  156. }
  157.  
  158. /*
  159.  * initialize the audio vars and register the update timer
  160.  */
  161. int r600_audio_init(struct radeon_device *rdev)
  162. {
  163.         if (!radeon_audio || !r600_audio_chipset_supported(rdev))
  164.                 return 0;
  165.  
  166.         r600_audio_engine_enable(rdev, true);
  167.  
  168.         rdev->audio_channels = -1;
  169.         rdev->audio_rate = -1;
  170.         rdev->audio_bits_per_sample = -1;
  171.         rdev->audio_status_bits = 0;
  172.         rdev->audio_category_code = 0;
  173.  
  174. //   setup_timer(
  175. //       &rdev->audio_timer,
  176. //       r600_audio_update_hdmi,
  177. //       (unsigned long)rdev);
  178.  
  179. //   mod_timer(&rdev->audio_timer, jiffies + 1);
  180.  
  181.         return 0;
  182. }
  183.  
  184. /*
  185.  * determin how the encoders and audio interface is wired together
  186.  */
  187. int r600_audio_tmds_index(struct drm_encoder *encoder)
  188. {
  189.         struct drm_device *dev = encoder->dev;
  190.         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
  191.         struct drm_encoder *other;
  192.  
  193.         switch (radeon_encoder->encoder_id) {
  194.         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
  195.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
  196.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
  197.                 return 0;
  198.  
  199.         case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
  200.                 /* special case check if an TMDS1 is present */
  201.                 list_for_each_entry(other, &dev->mode_config.encoder_list, head) {
  202.                         if (to_radeon_encoder(other)->encoder_id ==
  203.                                 ENCODER_OBJECT_ID_INTERNAL_TMDS1)
  204.                                 return 1;
  205.                 }
  206.                 return 0;
  207.  
  208.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
  209.         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
  210.                 return 1;
  211.  
  212.         default:
  213.                 DRM_ERROR("Unsupported encoder type 0x%02X\n",
  214.                           radeon_encoder->encoder_id);
  215.                 return -1;
  216.         }
  217. }
  218.  
  219. /*
  220.  * atach the audio codec to the clock source of the encoder
  221.  */
  222. void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
  223. {
  224.         struct drm_device *dev = encoder->dev;
  225.         struct radeon_device *rdev = dev->dev_private;
  226.         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
  227.         int base_rate = 48000;
  228.  
  229.         switch (radeon_encoder->encoder_id) {
  230.         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
  231.         case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
  232.                 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
  233.                 break;
  234.  
  235.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
  236.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
  237.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
  238.         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
  239.                 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
  240.                 break;
  241.  
  242.         default:
  243.                 DRM_ERROR("Unsupported encoder type 0x%02X\n",
  244.                           radeon_encoder->encoder_id);
  245.                 return;
  246.         }
  247.  
  248.         switch (r600_audio_tmds_index(encoder)) {
  249.         case 0:
  250.                 WREG32(R600_AUDIO_PLL1_MUL, base_rate*50);
  251.                 WREG32(R600_AUDIO_PLL1_DIV, clock*100);
  252.                 WREG32(R600_AUDIO_CLK_SRCSEL, 0);
  253.                 break;
  254.  
  255.         case 1:
  256.                 WREG32(R600_AUDIO_PLL2_MUL, base_rate*50);
  257.                 WREG32(R600_AUDIO_PLL2_DIV, clock*100);
  258.                 WREG32(R600_AUDIO_CLK_SRCSEL, 1);
  259.                 break;
  260.         }
  261. }
  262.  
  263. /*
  264.  * release the audio timer
  265.  * TODO: How to do this correctly on SMP systems?
  266.  */
  267. void r600_audio_fini(struct radeon_device *rdev)
  268. {
  269.         if (!radeon_audio || !r600_audio_chipset_supported(rdev))
  270.                 return;
  271.  
  272. //      del_timer(&rdev->audio_timer);
  273.  
  274.         r600_audio_engine_enable(rdev, false);
  275. }
  276.