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0131-bcm2835-always-use-2-4-8-channels-for-multichannel-l.patch

0131-bcm2835-always-use-2-4-8-channels-for-multichannel-l.patch 8.9 KB
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  1. From 895025420b369c66ed590356ebfd0b787572956a Mon Sep 17 00:00:00 2001
    2. 

  2. From: wm4 <wm4@nowhere>
    3. 

  3. Date: Wed, 13 Jan 2016 19:44:03 +0100
    4. 

  4. Subject: [PATCH] bcm2835: always use 2/4/8 channels for multichannel layouts
    5. 

  5. 

  6. Pad the unused channels with NA. This means userspace needs to write
    7. 

  7. additional, silent padding channels, which is not ideal, but better
    8. 

  8. than noise.
    9. 

  9. 

  10. Works around noise at the following channel counts: 3, 5, 6, 7
    11. 

  11. ---
    12. 

  12.  sound/arm/bcm2835-ctl.c | 89 +++++++++++++++++++++++++------------------------
    13. 

  13.  1 file changed, 45 insertions(+), 44 deletions(-)
    14. 

  14. 

  15. --- a/sound/arm/bcm2835-ctl.c
    16. 

  16. +++ b/sound/arm/bcm2835-ctl.c
    17. 

  17. @@ -349,6 +349,7 @@ struct cea_channel_speaker_allocation {
    18. 

  18.  #define FRW	SNDRV_CHMAP_FRW
    19. 

  19.  #define TC	SNDRV_CHMAP_TC
    20. 

  20.  #define FCH	SNDRV_CHMAP_TFC
    21. 

  21. +#define NA	SNDRV_CHMAP_NA
    22. 

  22.  
    23. 

  23.  /*
    24. 

  24.   * CEA-861 channel maps
    25. 

  25. @@ -356,69 +357,69 @@ struct cea_channel_speaker_allocation {
    26. 

  26.   * Stolen from sound/pci/hda/patch_hdmi.c
    27. 

  27.   * (unlike the source, this uses SNDRV_* constants directly, as by the
    28. 

  28.   *  map_tables array in patch_hdmi.c)
    29. 

  29. - * Unknown entries use 0, which unfortunately is SNDRV_CHMAP_UNKNOWN instead
    30. 

  30. - * of SNDRV_CHMAP_NA.
    31. 

  31. + * Entries which do not have a physical output channel use 0. Entries which
    32. 

  32. + * require userspace to output silence use NA (SNDRV_CHMAP_NA).
    33. 

  33.   */
    34. 

  34.  static struct cea_channel_speaker_allocation channel_allocations[] = {
    35. 

  35.  /*			  channel:   7     6    5    4    3     2    1    0  */
    36. 

  36.  { .ca_index = 0x00,  .speakers = {   0,    0,   0,   0,   0,    0,  FR,  FL } },
    37. 

  37.  				 /* 2.1 */
    38. 

  38. -{ .ca_index = 0x01,  .speakers = {   0,    0,   0,   0,   0,  LFE,  FR,  FL } },
    39. 

  39. +{ .ca_index = 0x01,  .speakers = {   0,    0,   0,   0,  NA,  LFE,  FR,  FL } },
    40. 

  40.  				 /* Dolby Surround */
    41. 

  41. -{ .ca_index = 0x02,  .speakers = {   0,    0,   0,   0,  FC,    0,  FR,  FL } },
    42. 

  42. +{ .ca_index = 0x02,  .speakers = {   0,    0,   0,   0,  FC,   NA,  FR,  FL } },
    43. 

  43.  				 /* surround40 */
    44. 

  44. -{ .ca_index = 0x08,  .speakers = {   0,    0,  RR,  RL,   0,    0,  FR,  FL } },
    45. 

  45. +{ .ca_index = 0x08,  .speakers = {  NA,   NA,  RR,  RL,  NA,   NA,  FR,  FL } },
    46. 

  46.  				 /* surround41 */
    47. 

  47. -{ .ca_index = 0x09,  .speakers = {   0,    0,  RR,  RL,   0,  LFE,  FR,  FL } },
    48. 

  48. +{ .ca_index = 0x09,  .speakers = {  NA,   NA,  RR,  RL,  NA,  LFE,  FR,  FL } },
    49. 

  49.  				 /* surround50 */
    50. 

  50. -{ .ca_index = 0x0a,  .speakers = {   0,    0,  RR,  RL,  FC,    0,  FR,  FL } },
    51. 

  51. +{ .ca_index = 0x0a,  .speakers = {  NA,   NA,  RR,  RL,  FC,   NA,  FR,  FL } },
    52. 

  52.  				 /* surround51 */
    53. 

  53. -{ .ca_index = 0x0b,  .speakers = {   0,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
    54. 

  54. +{ .ca_index = 0x0b,  .speakers = {  NA,   NA,  RR,  RL,  FC,  LFE,  FR,  FL } },
    55. 

  55.  				 /* 6.1 */
    56. 

  56. -{ .ca_index = 0x0f,  .speakers = {   0,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
    57. 

  57. +{ .ca_index = 0x0f,  .speakers = {  NA,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
    58. 

  58.  				 /* surround71 */
    59. 

  59.  { .ca_index = 0x13,  .speakers = { RRC,  RLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
    60. 

  60.  
    61. 

  61. -{ .ca_index = 0x03,  .speakers = {   0,    0,   0,   0,  FC,  LFE,  FR,  FL } },
    62. 

  62. -{ .ca_index = 0x04,  .speakers = {   0,    0,   0,  RC,   0,    0,  FR,  FL } },
    63. 

  63. -{ .ca_index = 0x05,  .speakers = {   0,    0,   0,  RC,   0,  LFE,  FR,  FL } },
    64. 

  64. -{ .ca_index = 0x06,  .speakers = {   0,    0,   0,  RC,  FC,    0,  FR,  FL } },
    65. 

  65. -{ .ca_index = 0x07,  .speakers = {   0,    0,   0,  RC,  FC,  LFE,  FR,  FL } },
    66. 

  66. -{ .ca_index = 0x0c,  .speakers = {   0,   RC,  RR,  RL,   0,    0,  FR,  FL } },
    67. 

  67. -{ .ca_index = 0x0d,  .speakers = {   0,   RC,  RR,  RL,   0,  LFE,  FR,  FL } },
    68. 

  68. -{ .ca_index = 0x0e,  .speakers = {   0,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
    69. 

  69. -{ .ca_index = 0x10,  .speakers = { RRC,  RLC,  RR,  RL,   0,    0,  FR,  FL } },
    70. 

  70. -{ .ca_index = 0x11,  .speakers = { RRC,  RLC,  RR,  RL,   0,  LFE,  FR,  FL } },
    71. 

  71. -{ .ca_index = 0x12,  .speakers = { RRC,  RLC,  RR,  RL,  FC,    0,  FR,  FL } },
    72. 

  72. -{ .ca_index = 0x14,  .speakers = { FRC,  FLC,   0,   0,   0,    0,  FR,  FL } },
    73. 

  73. -{ .ca_index = 0x15,  .speakers = { FRC,  FLC,   0,   0,   0,  LFE,  FR,  FL } },
    74. 

  74. -{ .ca_index = 0x16,  .speakers = { FRC,  FLC,   0,   0,  FC,    0,  FR,  FL } },
    75. 

  75. -{ .ca_index = 0x17,  .speakers = { FRC,  FLC,   0,   0,  FC,  LFE,  FR,  FL } },
    76. 

  76. -{ .ca_index = 0x18,  .speakers = { FRC,  FLC,   0,  RC,   0,    0,  FR,  FL } },
    77. 

  77. -{ .ca_index = 0x19,  .speakers = { FRC,  FLC,   0,  RC,   0,  LFE,  FR,  FL } },
    78. 

  78. -{ .ca_index = 0x1a,  .speakers = { FRC,  FLC,   0,  RC,  FC,    0,  FR,  FL } },
    79. 

  79. -{ .ca_index = 0x1b,  .speakers = { FRC,  FLC,   0,  RC,  FC,  LFE,  FR,  FL } },
    80. 

  80. -{ .ca_index = 0x1c,  .speakers = { FRC,  FLC,  RR,  RL,   0,    0,  FR,  FL } },
    81. 

  81. -{ .ca_index = 0x1d,  .speakers = { FRC,  FLC,  RR,  RL,   0,  LFE,  FR,  FL } },
    82. 

  82. -{ .ca_index = 0x1e,  .speakers = { FRC,  FLC,  RR,  RL,  FC,    0,  FR,  FL } },
    83. 

  83. +{ .ca_index = 0x03,  .speakers = {  NA,   NA,  NA,  NA,  FC,  LFE,  FR,  FL } },
    84. 

  84. +{ .ca_index = 0x04,  .speakers = {  NA,   NA,  NA,  RC,  NA,   NA,  FR,  FL } },
    85. 

  85. +{ .ca_index = 0x05,  .speakers = {  NA,   NA,  NA,  RC,  NA,  LFE,  FR,  FL } },
    86. 

  86. +{ .ca_index = 0x06,  .speakers = {  NA,   NA,  NA,  RC,  FC,   NA,  FR,  FL } },
    87. 

  87. +{ .ca_index = 0x07,  .speakers = {  NA,   NA,  NA,  RC,  FC,  LFE,  FR,  FL } },
    88. 

  88. +{ .ca_index = 0x0c,  .speakers = {  NA,   RC,  RR,  RL,  NA,   NA,  FR,  FL } },
    89. 

  89. +{ .ca_index = 0x0d,  .speakers = {  NA,   RC,  RR,  RL,  NA,  LFE,  FR,  FL } },
    90. 

  90. +{ .ca_index = 0x0e,  .speakers = {  NA,   RC,  RR,  RL,  FC,   NA,  FR,  FL } },
    91. 

  91. +{ .ca_index = 0x10,  .speakers = { RRC,  RLC,  RR,  RL,  NA,   NA,  FR,  FL } },
    92. 

  92. +{ .ca_index = 0x11,  .speakers = { RRC,  RLC,  RR,  RL,  NA,  LFE,  FR,  FL } },
    93. 

  93. +{ .ca_index = 0x12,  .speakers = { RRC,  RLC,  RR,  RL,  FC,   NA,  FR,  FL } },
    94. 

  94. +{ .ca_index = 0x14,  .speakers = { FRC,  FLC,  NA,  NA,  NA,   NA,  FR,  FL } },
    95. 

  95. +{ .ca_index = 0x15,  .speakers = { FRC,  FLC,  NA,  NA,  NA,  LFE,  FR,  FL } },
    96. 

  96. +{ .ca_index = 0x16,  .speakers = { FRC,  FLC,  NA,  NA,  FC,   NA,  FR,  FL } },
    97. 

  97. +{ .ca_index = 0x17,  .speakers = { FRC,  FLC,  NA,  NA,  FC,  LFE,  FR,  FL } },
    98. 

  98. +{ .ca_index = 0x18,  .speakers = { FRC,  FLC,  NA,  RC,  NA,   NA,  FR,  FL } },
    99. 

  99. +{ .ca_index = 0x19,  .speakers = { FRC,  FLC,  NA,  RC,  NA,  LFE,  FR,  FL } },
    100. 

  100. +{ .ca_index = 0x1a,  .speakers = { FRC,  FLC,  NA,  RC,  FC,   NA,  FR,  FL } },
    101. 

  101. +{ .ca_index = 0x1b,  .speakers = { FRC,  FLC,  NA,  RC,  FC,  LFE,  FR,  FL } },
    102. 

  102. +{ .ca_index = 0x1c,  .speakers = { FRC,  FLC,  RR,  RL,  NA,   NA,  FR,  FL } },
    103. 

  103. +{ .ca_index = 0x1d,  .speakers = { FRC,  FLC,  RR,  RL,  NA,  LFE,  FR,  FL } },
    104. 

  104. +{ .ca_index = 0x1e,  .speakers = { FRC,  FLC,  RR,  RL,  FC,   NA,  FR,  FL } },
    105. 

  105.  { .ca_index = 0x1f,  .speakers = { FRC,  FLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
    106. 

  106. -{ .ca_index = 0x20,  .speakers = {   0,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
    107. 

  107. -{ .ca_index = 0x21,  .speakers = {   0,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
    108. 

  108. -{ .ca_index = 0x22,  .speakers = {  TC,    0,  RR,  RL,  FC,    0,  FR,  FL } },
    109. 

  109. -{ .ca_index = 0x23,  .speakers = {  TC,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
    110. 

  110. -{ .ca_index = 0x24,  .speakers = { FRH,  FLH,  RR,  RL,   0,    0,  FR,  FL } },
    111. 

  111. -{ .ca_index = 0x25,  .speakers = { FRH,  FLH,  RR,  RL,   0,  LFE,  FR,  FL } },
    112. 

  112. -{ .ca_index = 0x26,  .speakers = { FRW,  FLW,  RR,  RL,   0,    0,  FR,  FL } },
    113. 

  113. -{ .ca_index = 0x27,  .speakers = { FRW,  FLW,  RR,  RL,   0,  LFE,  FR,  FL } },
    114. 

  114. -{ .ca_index = 0x28,  .speakers = {  TC,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
    115. 

  115. +{ .ca_index = 0x20,  .speakers = {  NA,  FCH,  RR,  RL,  FC,   NA,  FR,  FL } },
    116. 

  116. +{ .ca_index = 0x21,  .speakers = {  NA,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
    117. 

  117. +{ .ca_index = 0x22,  .speakers = {  TC,   NA,  RR,  RL,  FC,   NA,  FR,  FL } },
    118. 

  118. +{ .ca_index = 0x23,  .speakers = {  TC,   NA,  RR,  RL,  FC,  LFE,  FR,  FL } },
    119. 

  119. +{ .ca_index = 0x24,  .speakers = { FRH,  FLH,  RR,  RL,  NA,   NA,  FR,  FL } },
    120. 

  120. +{ .ca_index = 0x25,  .speakers = { FRH,  FLH,  RR,  RL,  NA,  LFE,  FR,  FL } },
    121. 

  121. +{ .ca_index = 0x26,  .speakers = { FRW,  FLW,  RR,  RL,  NA,   NA,  FR,  FL } },
    122. 

  122. +{ .ca_index = 0x27,  .speakers = { FRW,  FLW,  RR,  RL,  NA,  LFE,  FR,  FL } },
    123. 

  123. +{ .ca_index = 0x28,  .speakers = {  TC,   RC,  RR,  RL,  FC,   NA,  FR,  FL } },
    124. 

  124.  { .ca_index = 0x29,  .speakers = {  TC,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
    125. 

  125. -{ .ca_index = 0x2a,  .speakers = { FCH,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
    126. 

  126. +{ .ca_index = 0x2a,  .speakers = { FCH,   RC,  RR,  RL,  FC,   NA,  FR,  FL } },
    127. 

  127.  { .ca_index = 0x2b,  .speakers = { FCH,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
    128. 

  128. -{ .ca_index = 0x2c,  .speakers = {  TC,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
    129. 

  129. +{ .ca_index = 0x2c,  .speakers = {  TC,  FCH,  RR,  RL,  FC,   NA,  FR,  FL } },
    130. 

  130.  { .ca_index = 0x2d,  .speakers = {  TC,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
    131. 

  131. -{ .ca_index = 0x2e,  .speakers = { FRH,  FLH,  RR,  RL,  FC,    0,  FR,  FL } },
    132. 

  132. +{ .ca_index = 0x2e,  .speakers = { FRH,  FLH,  RR,  RL,  FC,   NA,  FR,  FL } },
    133. 

  133.  { .ca_index = 0x2f,  .speakers = { FRH,  FLH,  RR,  RL,  FC,  LFE,  FR,  FL } },
    134. 

  134. -{ .ca_index = 0x30,  .speakers = { FRW,  FLW,  RR,  RL,  FC,    0,  FR,  FL } },
    135. 

  135. +{ .ca_index = 0x30,  .speakers = { FRW,  FLW,  RR,  RL,  FC,   NA,  FR,  FL } },
    136. 

  136.  { .ca_index = 0x31,  .speakers = { FRW,  FLW,  RR,  RL,  FC,  LFE,  FR,  FL } },
    137. 

  137.  };
    138. 

  138.  
    139.