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1403 serge 1 
/*
2 
 * Copyright 2008 Advanced Micro Devices, Inc.
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 * Copyright 2008 Red Hat Inc.
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 * Copyright 2009 Christian König.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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 * OTHER DEALINGS IN THE SOFTWARE.
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 *
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 * Authors: Christian König
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 */
3192 Serge 26 
#include
1403 serge 27 
#include "radeon.h"
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#include "radeon_reg.h"
2005 serge 29 
#include "radeon_asic.h"
1403 serge 30 
#include "atom.h"
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2997 Serge 32 
/*
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 * check if enc_priv stores radeon_encoder_atom_dig
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 */
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static bool radeon_dig_encoder(struct drm_encoder *encoder)
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{
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	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
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	switch (radeon_encoder->encoder_id) {
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	case ENCODER_OBJECT_ID_INTERNAL_LVDS:
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	case ENCODER_OBJECT_ID_INTERNAL_TMDS1:
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	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
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	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
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	case ENCODER_OBJECT_ID_INTERNAL_DVO1:
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	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
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	case ENCODER_OBJECT_ID_INTERNAL_DDI:
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	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
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	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
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	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
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	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
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		return true;
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	}
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	return false;
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}
1403 serge 54 
 
55 
/*
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 * check if the chipset is supported
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 */
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static int r600_audio_chipset_supported(struct radeon_device *rdev)
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{
3764 Serge 60 
	return ASIC_IS_DCE2(rdev) && !ASIC_IS_DCE6(rdev);
1403 serge 61 
}
62 
 
2997 Serge 63 
struct r600_audio r600_audio_status(struct radeon_device *rdev)
1403 serge 64 
{
2997 Serge 65 
	struct r600_audio status;
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	uint32_t value;
1403 serge 67 
 
2997 Serge 68 
	value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
1403 serge 69 
 
2997 Serge 70 
	/* number of channels */
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	status.channels = (value & 0x7) + 1;
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	/* bits per sample */
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	switch ((value & 0xF0) >> 4) {
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	case 0x0:
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		status.bits_per_sample = 8;
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		break;
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	case 0x1:
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		status.bits_per_sample = 16;
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		break;
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	case 0x2:
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		status.bits_per_sample = 20;
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		break;
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	case 0x3:
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		status.bits_per_sample = 24;
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		break;
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	case 0x4:
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		status.bits_per_sample = 32;
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		break;
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	default:
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		dev_err(rdev->dev, "Unknown bits per sample 0x%x, using 16\n",
1963 serge 92 
		(int)value);
2997 Serge 93 
		status.bits_per_sample = 16;
94 
	}
1403 serge 95 
 
2997 Serge 96 
	/* current sampling rate in HZ */
1403 serge 97 
	if (value & 0x4000)
2997 Serge 98 
		status.rate = 44100;
1403 serge 99 
	else
2997 Serge 100 
		status.rate = 48000;
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	status.rate *= ((value >> 11) & 0x7) + 1;
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	status.rate /= ((value >> 8) & 0x7) + 1;
1403 serge 103 
 
2997 Serge 104 
	value = RREG32(R600_AUDIO_STATUS_BITS);
1403 serge 105 
 
2997 Serge 106 
	/* iec 60958 status bits */
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	status.status_bits = value & 0xff;
1403 serge 108 
 
2997 Serge 109 
	/* iec 60958 category code */
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	status.category_code = (value >> 8) & 0xff;
1403 serge 111 
 
2997 Serge 112 
	return status;
1403 serge 113 
}
114 
 
115 
/*
116 
 * update all hdmi interfaces with current audio parameters
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 */
2997 Serge 118 
void r600_audio_update_hdmi(struct work_struct *work)
1403 serge 119 
{
2997 Serge 120 
	struct radeon_device *rdev = container_of(work, struct radeon_device,
121 
						  audio_work);
1403 serge 122 
	struct drm_device *dev = rdev->ddev;
2997 Serge 123 
	struct r600_audio audio_status = r600_audio_status(rdev);
1403 serge 124 
	struct drm_encoder *encoder;
2997 Serge 125 
	bool changed = false;
1403 serge 126 
 
2997 Serge 127 
	if (rdev->audio_status.channels != audio_status.channels ||
128 
	    rdev->audio_status.rate != audio_status.rate ||
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	    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;
1403 serge 134 
	}
135 
 
136 
	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
2997 Serge 137 
		if (!radeon_dig_encoder(encoder))
138 
			continue;
139 
		if (changed || r600_hdmi_buffer_status_changed(encoder))
1963 serge 140 
			r600_hdmi_update_audio_settings(encoder);
1403 serge 141 
	}
142 
}
143 
 
144 
/*
1430 serge 145 
 * turn on/off audio engine
146 
 */
147 
static void r600_audio_engine_enable(struct radeon_device *rdev, bool enable)
148 
{
2997 Serge 149 
	u32 value = 0;
1963 serge 150 
	DRM_INFO("%s audio support\n", enable ? "Enabling" : "Disabling");
2997 Serge 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 
	}
1963 serge 161 
	rdev->audio_enabled = enable;
1430 serge 162 
}
163 
 
164 
/*
2997 Serge 165 
 * initialize the audio vars
1403 serge 166 
 */
167 
int r600_audio_init(struct radeon_device *rdev)
168 
{
1430 serge 169 
	if (!radeon_audio || !r600_audio_chipset_supported(rdev))
1403 serge 170 
		return 0;
171 
 
1430 serge 172 
	r600_audio_engine_enable(rdev, true);
1403 serge 173 
 
2997 Serge 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;
1403 serge 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 
{
1963 serge 189 
	if (!rdev->audio_enabled)
1403 serge 190 
		return;
191 
 
1430 serge 192 
	r600_audio_engine_enable(rdev, false);
1403 serge 193 
}