diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/r600_hdmi.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r600_hdmi.c | 172 |
1 files changed, 170 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/r600_hdmi.c b/drivers/gpu/drm/radeon/r600_hdmi.c index 26ef8ced6f89..b90dc0eb08e6 100644 --- a/drivers/gpu/drm/radeon/r600_hdmi.c +++ b/drivers/gpu/drm/radeon/r600_hdmi.c @@ -72,6 +72,169 @@ static const struct radeon_hdmi_acr r600_hdmi_predefined_acr[] = { /* + * check if the chipset is supported + */ +static int r600_audio_chipset_supported(struct radeon_device *rdev) +{ + return ASIC_IS_DCE2(rdev) && !ASIC_IS_NODCE(rdev); +} + +static struct r600_audio_pin r600_audio_status(struct radeon_device *rdev) +{ + struct r600_audio_pin status; + uint32_t value; + + value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL); + + /* number of channels */ + status.channels = (value & 0x7) + 1; + + /* bits per sample */ + switch ((value & 0xF0) >> 4) { + case 0x0: + status.bits_per_sample = 8; + break; + case 0x1: + status.bits_per_sample = 16; + break; + case 0x2: + status.bits_per_sample = 20; + break; + case 0x3: + status.bits_per_sample = 24; + break; + case 0x4: + status.bits_per_sample = 32; + break; + default: + dev_err(rdev->dev, "Unknown bits per sample 0x%x, using 16\n", + (int)value); + status.bits_per_sample = 16; + } + + /* current sampling rate in HZ */ + if (value & 0x4000) + status.rate = 44100; + else + status.rate = 48000; + status.rate *= ((value >> 11) & 0x7) + 1; + status.rate /= ((value >> 8) & 0x7) + 1; + + value = RREG32(R600_AUDIO_STATUS_BITS); + + /* iec 60958 status bits */ + status.status_bits = value & 0xff; + + /* iec 60958 category code */ + status.category_code = (value >> 8) & 0xff; + + return status; +} + +/* + * update all hdmi interfaces with current audio parameters + */ +void r600_audio_update_hdmi(struct work_struct *work) +{ + struct radeon_device *rdev = container_of(work, struct radeon_device, + audio_work); + struct drm_device *dev = rdev->ddev; + struct r600_audio_pin audio_status = r600_audio_status(rdev); + struct drm_encoder *encoder; + bool changed = false; + + if (rdev->audio.pin[0].channels != audio_status.channels || + rdev->audio.pin[0].rate != audio_status.rate || + rdev->audio.pin[0].bits_per_sample != audio_status.bits_per_sample || + rdev->audio.pin[0].status_bits != audio_status.status_bits || + rdev->audio.pin[0].category_code != audio_status.category_code) { + rdev->audio.pin[0] = audio_status; + changed = true; + } + + list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { + if (!radeon_encoder_is_digital(encoder)) + continue; + if (changed || r600_hdmi_buffer_status_changed(encoder)) + r600_hdmi_update_audio_settings(encoder); + } +} + +/* enable the audio stream */ +void r600_audio_enable(struct radeon_device *rdev, + struct r600_audio_pin *pin, + u8 enable_mask) +{ + u32 tmp = RREG32(AZ_HOT_PLUG_CONTROL); + + if (!pin) + return; + + if (enable_mask) { + tmp |= AUDIO_ENABLED; + if (enable_mask & 1) + tmp |= PIN0_AUDIO_ENABLED; + if (enable_mask & 2) + tmp |= PIN1_AUDIO_ENABLED; + if (enable_mask & 4) + tmp |= PIN2_AUDIO_ENABLED; + if (enable_mask & 8) + tmp |= PIN3_AUDIO_ENABLED; + } else { + tmp &= ~(AUDIO_ENABLED | + PIN0_AUDIO_ENABLED | + PIN1_AUDIO_ENABLED | + PIN2_AUDIO_ENABLED | + PIN3_AUDIO_ENABLED); + } + + WREG32(AZ_HOT_PLUG_CONTROL, tmp); +} + +/* + * initialize the audio vars + */ +int r600_audio_init(struct radeon_device *rdev) +{ + if (!radeon_audio || !r600_audio_chipset_supported(rdev)) + return 0; + + rdev->audio.enabled = true; + + rdev->audio.num_pins = 1; + rdev->audio.pin[0].channels = -1; + rdev->audio.pin[0].rate = -1; + rdev->audio.pin[0].bits_per_sample = -1; + rdev->audio.pin[0].status_bits = 0; + rdev->audio.pin[0].category_code = 0; + rdev->audio.pin[0].id = 0; + /* disable audio. it will be set up later */ + r600_audio_enable(rdev, &rdev->audio.pin[0], 0); + + return 0; +} + +/* + * release the audio timer + * TODO: How to do this correctly on SMP systems? + */ +void r600_audio_fini(struct radeon_device *rdev) +{ + if (!rdev->audio.enabled) + return; + + r600_audio_enable(rdev, &rdev->audio.pin[0], 0); + + rdev->audio.enabled = false; +} + +struct r600_audio_pin *r600_audio_get_pin(struct radeon_device *rdev) +{ + /* only one pin on 6xx-NI */ + return &rdev->audio.pin[0]; +} + +/* * calculate CTS and N values if they are not found in the table */ static void r600_hdmi_calc_cts(uint32_t clock, int *CTS, int *N, int freq) @@ -357,7 +520,7 @@ void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mod /* disable audio prior to setting up hw */ dig->afmt->pin = r600_audio_get_pin(rdev); - r600_audio_enable(rdev, dig->afmt->pin, false); + r600_audio_enable(rdev, dig->afmt->pin, 0xf); r600_audio_set_dto(encoder, mode->clock); @@ -443,7 +606,7 @@ void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mod WREG32(HDMI0_RAMP_CONTROL3 + offset, 0x00000001); /* enable audio after to setting up hw */ - r600_audio_enable(rdev, dig->afmt->pin, true); + r600_audio_enable(rdev, dig->afmt->pin, 0xf); } /** @@ -528,6 +691,11 @@ void r600_hdmi_enable(struct drm_encoder *encoder, bool enable) if (!enable && !dig->afmt->enabled) return; + if (!enable && dig->afmt->pin) { + r600_audio_enable(rdev, dig->afmt->pin, 0); + dig->afmt->pin = NULL; + } + /* Older chipsets require setting HDMI and routing manually */ if (!ASIC_IS_DCE3(rdev)) { if (enable) |