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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 && rdev->family < CHIP_CEDAR)
  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. 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. 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.         dev_err(rdev->dev, "Unknown bits per sample 0x%x using 16 instead\n",
  67.                 (int)value);
  68.  
  69.         return 16;
  70. }
  71.  
  72. /*
  73.  * current sampling rate in HZ
  74.  */
  75. int r600_audio_rate(struct radeon_device *rdev)
  76. {
  77.         uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
  78.         uint32_t result;
  79.  
  80.         if (value & 0x4000)
  81.                 result = 44100;
  82.         else
  83.                 result = 48000;
  84.  
  85.         result *= ((value >> 11) & 0x7) + 1;
  86.         result /= ((value >> 8) & 0x7) + 1;
  87.  
  88.         return result;
  89. }
  90.  
  91. /*
  92.  * iec 60958 status bits
  93.  */
  94. uint8_t r600_audio_status_bits(struct radeon_device *rdev)
  95. {
  96.         return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
  97. }
  98.  
  99. /*
  100.  * iec 60958 category code
  101.  */
  102. uint8_t r600_audio_category_code(struct radeon_device *rdev)
  103. {
  104.         return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
  105. }
  106.  
  107. /*
  108.  * update all hdmi interfaces with current audio parameters
  109.  */
  110. static void r600_audio_update_hdmi(unsigned long param)
  111. {
  112.         struct radeon_device *rdev = (struct radeon_device *)param;
  113.         struct drm_device *dev = rdev->ddev;
  114.  
  115.         int channels = r600_audio_channels(rdev);
  116.         int rate = r600_audio_rate(rdev);
  117.         int bps = r600_audio_bits_per_sample(rdev);
  118.         uint8_t status_bits = r600_audio_status_bits(rdev);
  119.         uint8_t category_code = r600_audio_category_code(rdev);
  120.  
  121.         struct drm_encoder *encoder;
  122.         int changes = 0, still_going = 0;
  123.  
  124.         changes |= channels != rdev->audio_channels;
  125.         changes |= rate != rdev->audio_rate;
  126.         changes |= bps != rdev->audio_bits_per_sample;
  127.         changes |= status_bits != rdev->audio_status_bits;
  128.         changes |= category_code != rdev->audio_category_code;
  129.  
  130.         if (changes) {
  131.                 rdev->audio_channels = channels;
  132.                 rdev->audio_rate = rate;
  133.                 rdev->audio_bits_per_sample = bps;
  134.                 rdev->audio_status_bits = status_bits;
  135.                 rdev->audio_category_code = category_code;
  136.         }
  137.  
  138.         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
  139.                 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
  140.                 still_going |= radeon_encoder->audio_polling_active;
  141.                 if (changes || r600_hdmi_buffer_status_changed(encoder))
  142.                         r600_hdmi_update_audio_settings(encoder);
  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\n", enable ? "Enabling" : "Disabling");
  155.         WREG32_P(R600_AUDIO_ENABLE, enable ? 0x81000000 : 0x0, ~0x81000000);
  156.         rdev->audio_enabled = enable;
  157. }
  158.  
  159. /*
  160.  * initialize the audio vars and register the update timer
  161.  */
  162. int r600_audio_init(struct radeon_device *rdev)
  163. {
  164.         if (!radeon_audio || !r600_audio_chipset_supported(rdev))
  165.                 return 0;
  166.  
  167.         r600_audio_engine_enable(rdev, true);
  168.  
  169.         rdev->audio_channels = -1;
  170.         rdev->audio_rate = -1;
  171.         rdev->audio_bits_per_sample = -1;
  172.         rdev->audio_status_bits = 0;
  173.         rdev->audio_category_code = 0;
  174.  
  175. //   setup_timer(
  176. //       &rdev->audio_timer,
  177. //       r600_audio_update_hdmi,
  178. //       (unsigned long)rdev);
  179.  
  180. //   mod_timer(&rdev->audio_timer, jiffies + 1);
  181.  
  182.         return 0;
  183. }
  184.  
  185. /*
  186.  * atach the audio codec to the clock source of the encoder
  187.  */
  188. void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
  189. {
  190.         struct drm_device *dev = encoder->dev;
  191.         struct radeon_device *rdev = dev->dev_private;
  192.         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
  193.         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
  194.         int base_rate = 48000;
  195.  
  196.         switch (radeon_encoder->encoder_id) {
  197.         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
  198.         case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
  199.                 WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
  200.                 break;
  201.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
  202.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
  203.         case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
  204.         case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
  205.                 WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
  206.                 break;
  207.         default:
  208.                 dev_err(rdev->dev, "Unsupported encoder type 0x%02X\n",
  209.                           radeon_encoder->encoder_id);
  210.                 return;
  211.         }
  212.  
  213.         switch (dig->dig_encoder) {
  214.         case 0:
  215.                 WREG32(R600_AUDIO_PLL1_MUL, base_rate * 50);
  216.                 WREG32(R600_AUDIO_PLL1_DIV, clock * 100);
  217.                 WREG32(R600_AUDIO_CLK_SRCSEL, 0);
  218.                 break;
  219.  
  220.         case 1:
  221.                 WREG32(R600_AUDIO_PLL2_MUL, base_rate * 50);
  222.                 WREG32(R600_AUDIO_PLL2_DIV, clock * 100);
  223.                 WREG32(R600_AUDIO_CLK_SRCSEL, 1);
  224.                 break;
  225.         default:
  226.                 dev_err(rdev->dev, "Unsupported DIG on encoder 0x%02X\n",
  227.                           radeon_encoder->encoder_id);
  228.                 return;
  229.         }
  230. }
  231.  
  232. /*
  233.  * release the audio timer
  234.  * TODO: How to do this correctly on SMP systems?
  235.  */
  236. void r600_audio_fini(struct radeon_device *rdev)
  237. {
  238.         if (!rdev->audio_enabled)
  239.                 return;
  240.  
  241. //      del_timer(&rdev->audio_timer);
  242.  
  243.         r600_audio_engine_enable(rdev, false);
  244. }
  245.