forked from Minki/linux
a8fe58cec3
This adds the ACP (Audio CoProcessor) IP driver and wires it up to the amdgpu driver. The ACP block provides the DMA engine for i2s based ALSA driver. This is required for audio on APUs that utilize an i2s codec. Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com> Reviewed-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Murali Krishna Vemuri <murali-krishna.vemuri@amd.com> Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com> Signed-off-by: Chunming Zhou <david1.zhou@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/*
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* Copyright 2015 Advanced Micro Devices, Inc.
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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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*/
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include "acp_gfx_if.h"
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#define ACP_MODE_I2S 0
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#define ACP_MODE_AZ 1
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#define mmACP_AZALIA_I2S_SELECT 0x51d4
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int amd_acp_hw_init(void *cgs_device,
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unsigned acp_version_major, unsigned acp_version_minor)
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{
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unsigned int acp_mode = ACP_MODE_I2S;
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if ((acp_version_major == 2) && (acp_version_minor == 2))
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acp_mode = cgs_read_register(cgs_device,
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mmACP_AZALIA_I2S_SELECT);
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if (acp_mode != ACP_MODE_I2S)
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return -ENODEV;
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return 0;
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}
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