| 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 ASIC_IS_DCE2(rdev) && !ASIC_IS_DCE6(rdev); |
| 61 | } |
| 62 | |
| 63 | struct r600_audio r600_audio_status(struct radeon_device *rdev) |
| 64 | { |
| 65 | struct r600_audio status; |
| 66 | uint32_t value; |
| 67 | |
| 68 | value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL); |
| 69 | |
| 70 | /* number of channels */ |
| 71 | status.channels = (value & 0x7) + 1; |
| 72 | |
| 73 | /* bits per sample */ |
| 74 | switch ((value & 0xF0) >> 4) { |
| 75 | case 0x0: |
| 76 | status.bits_per_sample = 8; |
| 77 | break; |
| 78 | case 0x1: |
| 79 | status.bits_per_sample = 16; |
| 80 | break; |
| 81 | case 0x2: |
| 82 | status.bits_per_sample = 20; |
| 83 | break; |
| 84 | case 0x3: |
| 85 | status.bits_per_sample = 24; |
| 86 | break; |
| 87 | case 0x4: |
| 88 | status.bits_per_sample = 32; |
| 89 | break; |
| 90 | default: |
| 91 | dev_err(rdev->dev, "Unknown bits per sample 0x%x, using 16\n", |
| 92 | (int)value); |
| 93 | status.bits_per_sample = 16; |
| 94 | } |
| 95 | |
| 96 | /* current sampling rate in HZ */ |
| 97 | if (value & 0x4000) |
| 98 | status.rate = 44100; |
| 99 | else |
| 100 | status.rate = 48000; |
| 101 | status.rate *= ((value >> 11) & 0x7) + 1; |
| 102 | status.rate /= ((value >> 8) & 0x7) + 1; |
| 103 | |
| 104 | value = RREG32(R600_AUDIO_STATUS_BITS); |
| 105 | |
| 106 | /* iec 60958 status bits */ |
| 107 | status.status_bits = value & 0xff; |
| 108 | |
| 109 | /* iec 60958 category code */ |
| 110 | status.category_code = (value >> 8) & 0xff; |
| 111 | |
| 112 | return status; |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * update all hdmi interfaces with current audio parameters |
| 117 | */ |
| 118 | void r600_audio_update_hdmi(struct work_struct *work) |
| 119 | { |
| 120 | struct radeon_device *rdev = container_of(work, struct radeon_device, |
| 121 | audio_work); |
| 122 | struct drm_device *dev = rdev->ddev; |
| 123 | struct r600_audio audio_status = r600_audio_status(rdev); |
| 124 | struct drm_encoder *encoder; |
| 125 | bool changed = false; |
| 126 | |
| 127 | if (rdev->audio_status.channels != audio_status.channels || |
| 128 | rdev->audio_status.rate != audio_status.rate || |
| 129 | rdev->audio_status.bits_per_sample != audio_status.bits_per_sample || |
| 130 | rdev->audio_status.status_bits != audio_status.status_bits || |
| 131 | rdev->audio_status.category_code != audio_status.category_code) { |
| 132 | rdev->audio_status = audio_status; |
| 133 | changed = true; |
| 134 | } |
| 135 | |
| 136 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 137 | if (!radeon_dig_encoder(encoder)) |
| 138 | continue; |
| 139 | if (changed || r600_hdmi_buffer_status_changed(encoder)) |
| 140 | r600_hdmi_update_audio_settings(encoder); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * turn on/off audio engine |
| 146 | */ |
| 147 | static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable) |
| 148 | { |
| 149 | u32 value = 0; |
| 150 | DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling"); |
| 151 | if (ASIC_IS_DCE4(rdev)) { |
| 152 | if (enable) { |
| 153 | value |= 0x81000000; /* Required to enable audio */ |
| 154 | value |= 0x0e1000f0; /* fglrx sets that too */ |
| 155 | } |
| 156 | WREG32(EVERGREEN_AUDIO_ENABLE, value); |
| 157 | } else { |
| 158 | WREG32_P(R600_AUDIO_ENABLE, |
| 159 | enable ? 0x81000000 : 0x0, ~0x81000000); |
| 160 | } |
| 161 | rdev->audio_enabled = enable; |
| 162 | } |
| 163 | |
| 164 | /* |
| 165 | * initialize the audio vars |
| 166 | */ |
| 167 | int r600_audio_init(struct radeon_device *rdev) |
| 168 | { |
| 169 | if (!radeon_audio || !r600_audio_chipset_supported(rdev)) |
| 170 | return 0; |
| 171 | |
| 172 | r600_audio_engine_enable(rdev, true); |
| 173 | |
| 174 | rdev->audio_status.channels = -1; |
| 175 | rdev->audio_status.rate = -1; |
| 176 | rdev->audio_status.bits_per_sample = -1; |
| 177 | rdev->audio_status.status_bits = 0; |
| 178 | rdev->audio_status.category_code = 0; |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | * release the audio timer |
| 185 | * TODO: How to do this correctly on SMP systems? |
| 186 | */ |
| 187 | void r600_audio_fini(struct radeon_device *rdev) |
| 188 | { |
| 189 | if (!rdev->audio_enabled) |
| 190 | return; |
| 191 | |
| 192 | r600_audio_engine_enable(rdev, false); |
| 193 | } |