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/*
* Copyright 2008 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
* Copyright 2009 Christian König.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Christian König
*/
#include <drm/drmP.h>
#include "radeon.h"
#include "radeon_reg.h"
#include "radeon_asic.h"
#include "atom.h"
/*
* check if enc_priv stores radeon_encoder_atom_dig
*/
static bool radeon_dig_encoder(struct drm_encoder *encoder)
{
struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
switch (radeon_encoder->encoder_id) {
case ENCODER_OBJECT_ID_INTERNAL_LVDS:
case ENCODER_OBJECT_ID_INTERNAL_TMDS1:
case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
case ENCODER_OBJECT_ID_INTERNAL_DVO1:
case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
case ENCODER_OBJECT_ID_INTERNAL_DDI:
case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
return true;
}
return false;
}
/*
* check if the chipset is supported
*/
static int r600_audio_chipset_supported(struct radeon_device *rdev)
{
return ASIC_IS_DCE2(rdev) && !ASIC_IS_DCE6(rdev);
}
struct r600_audio r600_audio_status(struct radeon_device *rdev)
{
struct r600_audio 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 audio_status = r600_audio_status(rdev);
struct drm_encoder *encoder;
bool changed = false;
if (rdev->audio_status.channels != audio_status.channels ||
rdev->audio_status.rate != audio_status.rate ||
rdev->audio_status.bits_per_sample != audio_status.bits_per_sample ||
rdev->audio_status.status_bits != audio_status.status_bits ||
rdev->audio_status.category_code != audio_status.category_code) {
rdev->audio_status = audio_status;
changed = true;
}
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
if (!radeon_dig_encoder(encoder))
continue;
if (changed || r600_hdmi_buffer_status_changed(encoder))
r600_hdmi_update_audio_settings(encoder);
}
}
/*
* turn on/off audio engine
*/
static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
{
u32 value = 0;
DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
if (ASIC_IS_DCE4(rdev)) {
if (enable) {
value |= 0x81000000; /* Required to enable audio */
value |= 0x0e1000f0; /* fglrx sets that too */
}
WREG32(EVERGREEN_AUDIO_ENABLE, value);
} else {
WREG32_P(R600_AUDIO_ENABLE,
enable ? 0x81000000 : 0x0, ~0x81000000);
}
rdev->audio_enabled = enable;
}
/*
* initialize the audio vars
*/
int r600_audio_init(struct radeon_device *rdev)
{
if (!radeon_audio || !r600_audio_chipset_supported(rdev))
return 0;
r600_audio_engine_enable(rdev, true);
rdev->audio_status.channels = -1;
rdev->audio_status.rate = -1;
rdev->audio_status.bits_per_sample = -1;
rdev->audio_status.status_bits = 0;
rdev->audio_status.category_code = 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_engine_enable(rdev, false);
}
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