drivers/gpu/drm/radeon/radeon_audio.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright 2014 Advanced Micro Devices, Inc.
  *
  * 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: Slava Grigorev <slava.grigorev@amd.com>
  */

 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
 #include "radeon.h"
 #include "atom.h"
 #include "radeon_audio.h"

 void r600_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
 		u8 enable_mask);
 void dce4_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
 		u8 enable_mask);
 void dce6_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
 		u8 enable_mask);
 u32 dce6_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg);
 void dce6_endpoint_wreg(struct radeon_device *rdev,
 		u32 offset, u32 reg, u32 v);
 void dce3_2_afmt_write_sad_regs(struct drm_encoder *encoder,
 		struct cea_sad *sads, int sad_count);
 void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder,
 		struct cea_sad *sads, int sad_count);
 void dce6_afmt_write_sad_regs(struct drm_encoder *encoder,
 		struct cea_sad *sads, int sad_count);
 void dce3_2_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce3_2_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce4_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce4_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce6_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce6_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce4_afmt_write_latency_fields(struct drm_encoder *encoder,
 		struct drm_connector *connector, struct drm_display_mode *mode);
 void dce6_afmt_write_latency_fields(struct drm_encoder *encoder,
 		struct drm_connector *connector, struct drm_display_mode *mode);
 struct r600_audio_pin* r600_audio_get_pin(struct radeon_device *rdev);
 struct r600_audio_pin* dce6_audio_get_pin(struct radeon_device *rdev);
 void dce6_afmt_select_pin(struct drm_encoder *encoder);

 static const u32 pin_offsets[7] =
 {
 	(0x5e00 - 0x5e00),
 	(0x5e18 - 0x5e00),
 	(0x5e30 - 0x5e00),
 	(0x5e48 - 0x5e00),
 	(0x5e60 - 0x5e00),
 	(0x5e78 - 0x5e00),
 	(0x5e90 - 0x5e00),
 };

 static u32 radeon_audio_rreg(struct radeon_device *rdev, u32 offset, u32 reg)
 {
 	return RREG32(reg);
 }

 static void radeon_audio_wreg(struct radeon_device *rdev, u32 offset,
 		u32 reg, u32 v)
 {
 	WREG32(reg, v);
 }

 static struct radeon_audio_basic_funcs dce32_funcs = {
 	.endpoint_rreg = radeon_audio_rreg,
 	.endpoint_wreg = radeon_audio_wreg,
 	.enable = r600_audio_enable,
 };

 static struct radeon_audio_basic_funcs dce4_funcs = {
 	.endpoint_rreg = radeon_audio_rreg,
 	.endpoint_wreg = radeon_audio_wreg,
 	.enable = dce4_audio_enable,
 };

 static struct radeon_audio_basic_funcs dce6_funcs = {
 	.endpoint_rreg = dce6_endpoint_rreg,
 	.endpoint_wreg = dce6_endpoint_wreg,
 	.enable = dce6_audio_enable,
 };

 static struct radeon_audio_funcs dce32_hdmi_funcs = {
 	.get_pin = r600_audio_get_pin,
 	.write_sad_regs = dce3_2_afmt_write_sad_regs,
 	.write_speaker_allocation = dce3_2_afmt_hdmi_write_speaker_allocation,
 };

 static struct radeon_audio_funcs dce32_dp_funcs = {
 	.get_pin = r600_audio_get_pin,
 	.write_sad_regs = dce3_2_afmt_write_sad_regs,
 	.write_speaker_allocation = dce3_2_afmt_dp_write_speaker_allocation,
 };

 static struct radeon_audio_funcs dce4_hdmi_funcs = {
 	.get_pin = r600_audio_get_pin,
 	.write_sad_regs = evergreen_hdmi_write_sad_regs,
 	.write_speaker_allocation = dce4_afmt_hdmi_write_speaker_allocation,
 	.write_latency_fields = dce4_afmt_write_latency_fields,
 };

 static struct radeon_audio_funcs dce4_dp_funcs = {
 	.get_pin = r600_audio_get_pin,
 	.write_sad_regs = evergreen_hdmi_write_sad_regs,
 	.write_speaker_allocation = dce4_afmt_dp_write_speaker_allocation,
 	.write_latency_fields = dce4_afmt_write_latency_fields,
 };

 static struct radeon_audio_funcs dce6_hdmi_funcs = {
 	.select_pin = dce6_afmt_select_pin,
 	.get_pin = dce6_audio_get_pin,
 	.write_sad_regs = dce6_afmt_write_sad_regs,
 	.write_speaker_allocation = dce6_afmt_hdmi_write_speaker_allocation,
 	.write_latency_fields = dce6_afmt_write_latency_fields,
 };

 static struct radeon_audio_funcs dce6_dp_funcs = {
 	.select_pin = dce6_afmt_select_pin,
 	.get_pin = dce6_audio_get_pin,
 	.write_sad_regs = dce6_afmt_write_sad_regs,
 	.write_speaker_allocation = dce6_afmt_dp_write_speaker_allocation,
 	.write_latency_fields = dce6_afmt_write_latency_fields,
 };

 static void radeon_audio_interface_init(struct radeon_device *rdev)
 {
 	if (ASIC_IS_DCE6(rdev)) {
 		rdev->audio.funcs = &dce6_funcs;
 		rdev->audio.hdmi_funcs = &dce6_hdmi_funcs;
 		rdev->audio.dp_funcs = &dce6_dp_funcs;
 	} else if (ASIC_IS_DCE4(rdev)) {
 		rdev->audio.funcs = &dce4_funcs;
 		rdev->audio.hdmi_funcs = &dce4_hdmi_funcs;
 		rdev->audio.dp_funcs = &dce4_dp_funcs;
 	} else {
 		rdev->audio.funcs = &dce32_funcs;
 		rdev->audio.hdmi_funcs = &dce32_hdmi_funcs;
 		rdev->audio.dp_funcs = &dce32_dp_funcs;
 	}
 }

 static int radeon_audio_chipset_supported(struct radeon_device *rdev)
 {
 	return ASIC_IS_DCE2(rdev) && !ASIC_IS_NODCE(rdev);
 }

 int radeon_audio_init(struct radeon_device *rdev)
 {
 	int i;

 	if (!radeon_audio || !radeon_audio_chipset_supported(rdev))
 		return 0;

 	rdev->audio.enabled = true;

 	if (ASIC_IS_DCE83(rdev))		/* KB: 2 streams, 3 endpoints */
 		rdev->audio.num_pins = 3;
 	else if (ASIC_IS_DCE81(rdev))	/* KV: 4 streams, 7 endpoints */
 		rdev->audio.num_pins = 7;
 	else if (ASIC_IS_DCE8(rdev))	/* BN/HW: 6 streams, 7 endpoints */
 		rdev->audio.num_pins = 7;
 	else if (ASIC_IS_DCE64(rdev))	/* OL: 2 streams, 2 endpoints */
 		rdev->audio.num_pins = 2;
 	else if (ASIC_IS_DCE61(rdev))	/* TN: 4 streams, 6 endpoints */
 		rdev->audio.num_pins = 6;
 	else if (ASIC_IS_DCE6(rdev))	/* SI: 6 streams, 6 endpoints */
 		rdev->audio.num_pins = 6;
 	else
 		rdev->audio.num_pins = 1;

 	for (i = 0; i < rdev->audio.num_pins; i++) {
 		rdev->audio.pin[i].channels = -1;
 		rdev->audio.pin[i].rate = -1;
 		rdev->audio.pin[i].bits_per_sample = -1;
 		rdev->audio.pin[i].status_bits = 0;
 		rdev->audio.pin[i].category_code = 0;
 		rdev->audio.pin[i].connected = false;
 		rdev->audio.pin[i].offset = pin_offsets[i];
 		rdev->audio.pin[i].id = i;
 	}

 	radeon_audio_interface_init(rdev);

 	/* disable audio.  it will be set up later */
 	for (i = 0; i < rdev->audio.num_pins; i++)
 		radeon_audio_enable(rdev, &rdev->audio.pin[i], false);

 	return 0;
 }

 void radeon_audio_detect(struct drm_connector *connector,
 	enum drm_connector_status status)
 {
 	if (!connector || !connector->encoder)
 		return;

 	if (status == connector_status_connected) {
 		int sink_type;
 		struct radeon_device *rdev = connector->encoder->dev->dev_private;
 		struct radeon_connector *radeon_connector;
 		struct radeon_encoder *radeon_encoder =
 			to_radeon_encoder(connector->encoder);

 		if (!drm_detect_monitor_audio(radeon_connector_edid(connector))) {
 			radeon_encoder->audio = 0;
 			return;
 		}

 		radeon_connector = to_radeon_connector(connector);
 		sink_type = radeon_dp_getsinktype(radeon_connector);

 		if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort &&
 			sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
 			radeon_encoder->audio = rdev->audio.dp_funcs;
 		else
 			radeon_encoder->audio = rdev->audio.hdmi_funcs;
 		/* TODO: set up the sads, etc. and set the audio enable_mask */
 	} else {
 		/* TODO: reset the audio enable_mask */
 	}
 }

 u32 radeon_audio_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg)
 {
 	if (rdev->audio.funcs->endpoint_rreg)
 		return rdev->audio.funcs->endpoint_rreg(rdev, offset, reg);

 	return 0;
 }

 void radeon_audio_endpoint_wreg(struct radeon_device *rdev, u32 offset,
 	u32 reg, u32 v)
 {
 	if (rdev->audio.funcs->endpoint_wreg)
 		rdev->audio.funcs->endpoint_wreg(rdev, offset, reg, v);
 }

 void radeon_audio_write_sad_regs(struct drm_encoder *encoder)
 {
 	struct radeon_encoder *radeon_encoder;
 	struct drm_connector *connector;
 	struct radeon_connector *radeon_connector = NULL;
 	struct cea_sad *sads;
 	int sad_count;

 	list_for_each_entry(connector,
 		&encoder->dev->mode_config.connector_list, head) {
 		if (connector->encoder == encoder) {
 			radeon_connector = to_radeon_connector(connector);
 			break;
 		}
 	}

 	if (!radeon_connector) {
 		DRM_ERROR("Couldn't find encoder's connector\n");
 		return;
 	}

 	sad_count = drm_edid_to_sad(radeon_connector_edid(connector), &sads);
 	if (sad_count <= 0) {
 		DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
 		return;
 	}
 	BUG_ON(!sads);

 	radeon_encoder = to_radeon_encoder(encoder);

 	if (radeon_encoder->audio && radeon_encoder->audio->write_sad_regs)
 		radeon_encoder->audio->write_sad_regs(encoder, sads, sad_count);

 	kfree(sads);
 }

 void radeon_audio_write_speaker_allocation(struct drm_encoder *encoder)
 {
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
     struct drm_connector *connector;
     struct radeon_connector *radeon_connector = NULL;
     u8 *sadb = NULL;
     int sad_count;

     list_for_each_entry(connector,
 		&encoder->dev->mode_config.connector_list, head) {
         if (connector->encoder == encoder) {
             radeon_connector = to_radeon_connector(connector);
             break;
         }
     }

     if (!radeon_connector) {
         DRM_ERROR("Couldn't find encoder's connector\n");
         return;
     }

     sad_count = drm_edid_to_speaker_allocation(
 		radeon_connector_edid(connector), &sadb);
     if (sad_count < 0) {
         DRM_DEBUG("Couldn't read Speaker Allocation Data Block: %d\n",
 			sad_count);
         sad_count = 0;
     }

 	if (radeon_encoder->audio && radeon_encoder->audio->write_speaker_allocation)
 		radeon_encoder->audio->write_speaker_allocation(encoder, sadb, sad_count);

     kfree(sadb);
 }

 void radeon_audio_write_latency_fields(struct drm_encoder *encoder,
 	struct drm_display_mode *mode)
 {
 	struct radeon_encoder *radeon_encoder;
 	struct drm_connector *connector;
 	struct radeon_connector *radeon_connector = 0;

 	list_for_each_entry(connector,
 		&encoder->dev->mode_config.connector_list, head) {
 		if (connector->encoder == encoder) {
 			radeon_connector = to_radeon_connector(connector);
 			break;
 		}
 	}

 	if (!radeon_connector) {
 		DRM_ERROR("Couldn't find encoder's connector\n");
 		return;
 	}

 	radeon_encoder = to_radeon_encoder(encoder);

 	if (radeon_encoder->audio && radeon_encoder->audio->write_latency_fields)
 		radeon_encoder->audio->write_latency_fields(encoder, connector, mode);
 }

 struct r600_audio_pin* radeon_audio_get_pin(struct drm_encoder *encoder)
 {
 	struct radeon_device *rdev = encoder->dev->dev_private;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

 	if (radeon_encoder->audio && radeon_encoder->audio->get_pin)
 		return radeon_encoder->audio->get_pin(rdev);

 	return NULL;
 }

 void radeon_audio_select_pin(struct drm_encoder *encoder)
 {
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

 	if (radeon_encoder->audio && radeon_encoder->audio->select_pin)
 		radeon_encoder->audio->select_pin(encoder);
 }

 void radeon_audio_enable(struct radeon_device *rdev,
 	struct r600_audio_pin *pin, u8 enable_mask)
 {
 	if (rdev->audio.funcs->enable)
 		rdev->audio.funcs->enable(rdev, pin, enable_mask);
 }

 void radeon_audio_fini(struct radeon_device *rdev)
 {
 	int i;

 	if (!rdev->audio.enabled)
 		return;

 	for (i = 0; i < rdev->audio.num_pins; i++)
 		radeon_audio_enable(rdev, &rdev->audio.pin[i], false);

 	rdev->audio.enabled = false;
 }
	/*
	* Copyright 2014 Advanced Micro Devices, Inc.
	*
	* 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: Slava Grigorev <slava.grigorev@amd.com>
	*/

	#include <drm/drmP.h>
	#include <drm/drm_crtc.h>
	#include "radeon.h"
	#include "atom.h"
	#include "radeon_audio.h"

	void r600_audio_enable(struct radeon_device rdev, struct r600_audio_pin pin,
	u8 enable_mask);
	void dce4_audio_enable(struct radeon_device rdev, struct r600_audio_pin pin,
	u8 enable_mask);
	void dce6_audio_enable(struct radeon_device rdev, struct r600_audio_pin pin,
	u8 enable_mask);
	u32 dce6_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg);
	void dce6_endpoint_wreg(struct radeon_device *rdev,
	u32 offset, u32 reg, u32 v);
	void dce3_2_afmt_write_sad_regs(struct drm_encoder *encoder,
	struct cea_sad *sads, int sad_count);
	void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder,
	struct cea_sad *sads, int sad_count);
	void dce6_afmt_write_sad_regs(struct drm_encoder *encoder,
	struct cea_sad *sads, int sad_count);
	void dce3_2_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
	u8 *sadb, int sad_count);
	void dce3_2_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
	u8 *sadb, int sad_count);
	void dce4_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
	u8 *sadb, int sad_count);
	void dce4_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
	u8 *sadb, int sad_count);
	void dce6_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
	u8 *sadb, int sad_count);
	void dce6_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
	u8 *sadb, int sad_count);
	void dce4_afmt_write_latency_fields(struct drm_encoder *encoder,
	struct drm_connector connector, struct drm_display_mode mode);
	void dce6_afmt_write_latency_fields(struct drm_encoder *encoder,
	struct drm_connector connector, struct drm_display_mode mode);
	struct r600_audio_pin* r600_audio_get_pin(struct radeon_device *rdev);
	struct r600_audio_pin* dce6_audio_get_pin(struct radeon_device *rdev);
	void dce6_afmt_select_pin(struct drm_encoder *encoder);

	static const u32 pin_offsets[7] =
	{
	(0x5e00 - 0x5e00),
	(0x5e18 - 0x5e00),
	(0x5e30 - 0x5e00),
	(0x5e48 - 0x5e00),
	(0x5e60 - 0x5e00),
	(0x5e78 - 0x5e00),
	(0x5e90 - 0x5e00),
	};

	static u32 radeon_audio_rreg(struct radeon_device *rdev, u32 offset, u32 reg)
	{
	return RREG32(reg);
	}

	static void radeon_audio_wreg(struct radeon_device *rdev, u32 offset,
	u32 reg, u32 v)
	{
	WREG32(reg, v);
	}

	static struct radeon_audio_basic_funcs dce32_funcs = {
	.endpoint_rreg = radeon_audio_rreg,
	.endpoint_wreg = radeon_audio_wreg,
	.enable = r600_audio_enable,
	};

	static struct radeon_audio_basic_funcs dce4_funcs = {
	.endpoint_rreg = radeon_audio_rreg,
	.endpoint_wreg = radeon_audio_wreg,
	.enable = dce4_audio_enable,
	};

	static struct radeon_audio_basic_funcs dce6_funcs = {
	.endpoint_rreg = dce6_endpoint_rreg,
	.endpoint_wreg = dce6_endpoint_wreg,
	.enable = dce6_audio_enable,
	};

	static struct radeon_audio_funcs dce32_hdmi_funcs = {
	.get_pin = r600_audio_get_pin,
	.write_sad_regs = dce3_2_afmt_write_sad_regs,
	.write_speaker_allocation = dce3_2_afmt_hdmi_write_speaker_allocation,
	};

	static struct radeon_audio_funcs dce32_dp_funcs = {
	.get_pin = r600_audio_get_pin,
	.write_sad_regs = dce3_2_afmt_write_sad_regs,
	.write_speaker_allocation = dce3_2_afmt_dp_write_speaker_allocation,
	};

	static struct radeon_audio_funcs dce4_hdmi_funcs = {
	.get_pin = r600_audio_get_pin,
	.write_sad_regs = evergreen_hdmi_write_sad_regs,
	.write_speaker_allocation = dce4_afmt_hdmi_write_speaker_allocation,
	.write_latency_fields = dce4_afmt_write_latency_fields,
	};

	static struct radeon_audio_funcs dce4_dp_funcs = {
	.get_pin = r600_audio_get_pin,
	.write_sad_regs = evergreen_hdmi_write_sad_regs,
	.write_speaker_allocation = dce4_afmt_dp_write_speaker_allocation,
	.write_latency_fields = dce4_afmt_write_latency_fields,
	};

	static struct radeon_audio_funcs dce6_hdmi_funcs = {
	.select_pin = dce6_afmt_select_pin,
	.get_pin = dce6_audio_get_pin,
	.write_sad_regs = dce6_afmt_write_sad_regs,
	.write_speaker_allocation = dce6_afmt_hdmi_write_speaker_allocation,
	.write_latency_fields = dce6_afmt_write_latency_fields,
	};

	static struct radeon_audio_funcs dce6_dp_funcs = {
	.select_pin = dce6_afmt_select_pin,
	.get_pin = dce6_audio_get_pin,
	.write_sad_regs = dce6_afmt_write_sad_regs,
	.write_speaker_allocation = dce6_afmt_dp_write_speaker_allocation,
	.write_latency_fields = dce6_afmt_write_latency_fields,
	};

	static void radeon_audio_interface_init(struct radeon_device *rdev)
	{
	if (ASIC_IS_DCE6(rdev)) {
	rdev->audio.funcs = &dce6_funcs;
	rdev->audio.hdmi_funcs = &dce6_hdmi_funcs;
	rdev->audio.dp_funcs = &dce6_dp_funcs;
	} else if (ASIC_IS_DCE4(rdev)) {
	rdev->audio.funcs = &dce4_funcs;
	rdev->audio.hdmi_funcs = &dce4_hdmi_funcs;
	rdev->audio.dp_funcs = &dce4_dp_funcs;
	} else {
	rdev->audio.funcs = &dce32_funcs;
	rdev->audio.hdmi_funcs = &dce32_hdmi_funcs;
	rdev->audio.dp_funcs = &dce32_dp_funcs;
	}
	}

	static int radeon_audio_chipset_supported(struct radeon_device *rdev)
	{
	return ASIC_IS_DCE2(rdev) && !ASIC_IS_NODCE(rdev);
	}

	int radeon_audio_init(struct radeon_device *rdev)
	{
	int i;

	if (!radeon_audio \|\| !radeon_audio_chipset_supported(rdev))
	return 0;

	rdev->audio.enabled = true;

	if (ASIC_IS_DCE83(rdev)) /* KB: 2 streams, 3 endpoints */
	rdev->audio.num_pins = 3;
	else if (ASIC_IS_DCE81(rdev)) /* KV: 4 streams, 7 endpoints */
	rdev->audio.num_pins = 7;
	else if (ASIC_IS_DCE8(rdev)) /* BN/HW: 6 streams, 7 endpoints */
	rdev->audio.num_pins = 7;
	else if (ASIC_IS_DCE64(rdev)) /* OL: 2 streams, 2 endpoints */
	rdev->audio.num_pins = 2;
	else if (ASIC_IS_DCE61(rdev)) /* TN: 4 streams, 6 endpoints */
	rdev->audio.num_pins = 6;
	else if (ASIC_IS_DCE6(rdev)) /* SI: 6 streams, 6 endpoints */
	rdev->audio.num_pins = 6;
	else
	rdev->audio.num_pins = 1;

	for (i = 0; i < rdev->audio.num_pins; i++) {
	rdev->audio.pin[i].channels = -1;
	rdev->audio.pin[i].rate = -1;
	rdev->audio.pin[i].bits_per_sample = -1;
	rdev->audio.pin[i].status_bits = 0;
	rdev->audio.pin[i].category_code = 0;
	rdev->audio.pin[i].connected = false;
	rdev->audio.pin[i].offset = pin_offsets[i];
	rdev->audio.pin[i].id = i;
	}

	radeon_audio_interface_init(rdev);

	/* disable audio. it will be set up later */
	for (i = 0; i < rdev->audio.num_pins; i++)
	radeon_audio_enable(rdev, &rdev->audio.pin[i], false);

	return 0;
	}

	void radeon_audio_detect(struct drm_connector *connector,
	enum drm_connector_status status)
	{
	if (!connector \|\| !connector->encoder)
	return;

	if (status == connector_status_connected) {
	int sink_type;
	struct radeon_device *rdev = connector->encoder->dev->dev_private;
	struct radeon_connector *radeon_connector;
	struct radeon_encoder *radeon_encoder =
	to_radeon_encoder(connector->encoder);

	if (!drm_detect_monitor_audio(radeon_connector_edid(connector))) {
	radeon_encoder->audio = 0;
	return;
	}

	radeon_connector = to_radeon_connector(connector);
	sink_type = radeon_dp_getsinktype(radeon_connector);

	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort &&
	sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
	radeon_encoder->audio = rdev->audio.dp_funcs;
	else
	radeon_encoder->audio = rdev->audio.hdmi_funcs;
	/* TODO: set up the sads, etc. and set the audio enable_mask */
	} else {
	/* TODO: reset the audio enable_mask */
	}
	}

	u32 radeon_audio_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg)
	{
	if (rdev->audio.funcs->endpoint_rreg)
	return rdev->audio.funcs->endpoint_rreg(rdev, offset, reg);

	return 0;
	}

	void radeon_audio_endpoint_wreg(struct radeon_device *rdev, u32 offset,
	u32 reg, u32 v)
	{
	if (rdev->audio.funcs->endpoint_wreg)
	rdev->audio.funcs->endpoint_wreg(rdev, offset, reg, v);
	}

	void radeon_audio_write_sad_regs(struct drm_encoder *encoder)
	{
	struct radeon_encoder *radeon_encoder;
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector = NULL;
	struct cea_sad *sads;
	int sad_count;

	list_for_each_entry(connector,
	&encoder->dev->mode_config.connector_list, head) {
	if (connector->encoder == encoder) {
	radeon_connector = to_radeon_connector(connector);
	break;
	}
	}

	if (!radeon_connector) {
	DRM_ERROR("Couldn't find encoder's connector\n");
	return;
	}

	sad_count = drm_edid_to_sad(radeon_connector_edid(connector), &sads);
	if (sad_count <= 0) {
	DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
	return;
	}
	BUG_ON(!sads);

	radeon_encoder = to_radeon_encoder(encoder);

	if (radeon_encoder->audio && radeon_encoder->audio->write_sad_regs)
	radeon_encoder->audio->write_sad_regs(encoder, sads, sad_count);

	kfree(sads);
	}

	void radeon_audio_write_speaker_allocation(struct drm_encoder *encoder)
	{
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector = NULL;
	u8 *sadb = NULL;
	int sad_count;

	list_for_each_entry(connector,
	&encoder->dev->mode_config.connector_list, head) {
	if (connector->encoder == encoder) {
	radeon_connector = to_radeon_connector(connector);
	break;
	}
	}

	if (!radeon_connector) {
	DRM_ERROR("Couldn't find encoder's connector\n");
	return;
	}

	sad_count = drm_edid_to_speaker_allocation(
	radeon_connector_edid(connector), &sadb);
	if (sad_count < 0) {
	DRM_DEBUG("Couldn't read Speaker Allocation Data Block: %d\n",
	sad_count);
	sad_count = 0;
	}

	if (radeon_encoder->audio && radeon_encoder->audio->write_speaker_allocation)
	radeon_encoder->audio->write_speaker_allocation(encoder, sadb, sad_count);

	kfree(sadb);
	}

	void radeon_audio_write_latency_fields(struct drm_encoder *encoder,
	struct drm_display_mode *mode)
	{
	struct radeon_encoder *radeon_encoder;
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector = 0;

	list_for_each_entry(connector,
	&encoder->dev->mode_config.connector_list, head) {
	if (connector->encoder == encoder) {
	radeon_connector = to_radeon_connector(connector);
	break;
	}
	}

	if (!radeon_connector) {
	DRM_ERROR("Couldn't find encoder's connector\n");
	return;
	}

	radeon_encoder = to_radeon_encoder(encoder);

	if (radeon_encoder->audio && radeon_encoder->audio->write_latency_fields)
	radeon_encoder->audio->write_latency_fields(encoder, connector, mode);
	}

	struct r600_audio_pin* radeon_audio_get_pin(struct drm_encoder *encoder)
	{
	struct radeon_device *rdev = encoder->dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

	if (radeon_encoder->audio && radeon_encoder->audio->get_pin)
	return radeon_encoder->audio->get_pin(rdev);

	return NULL;
	}

	void radeon_audio_select_pin(struct drm_encoder *encoder)
	{
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);

	if (radeon_encoder->audio && radeon_encoder->audio->select_pin)
	radeon_encoder->audio->select_pin(encoder);
	}

	void radeon_audio_enable(struct radeon_device *rdev,
	struct r600_audio_pin *pin, u8 enable_mask)
	{
	if (rdev->audio.funcs->enable)
	rdev->audio.funcs->enable(rdev, pin, enable_mask);
	}

	void radeon_audio_fini(struct radeon_device *rdev)
	{
	int i;

	if (!rdev->audio.enabled)
	return;

	for (i = 0; i < rdev->audio.num_pins; i++)
	radeon_audio_enable(rdev, &rdev->audio.pin[i], false);

	rdev->audio.enabled = false;
	}