Unverified Commit 1fb50047 authored by Sheetal's avatar Sheetal Committed by Mark Brown
Browse files

ASoC: tegra: Update PLL rate for Tegra264 



The PLLs should be set with a VCO frequency in the 900MHz – 1GHz range
to minimize jitter and ppm error for Tegra264. Add the PLLA rate
accordingly.

Therefore, use 983040000 frequency is for multiple of 8K frequencies
and 993484800 frequency is for multiple of 11.025K frequencies.

Signed-off-by: default avatarSheetal <sheetal@nvidia.com>
Link: https://patch.msgid.link/20250512051747.1026770-7-sheetal@nvidia.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fa83757d

sound/soc/tegra/tegra_audio_graph_card.c

+12 −2
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

// SPDX-FileCopyrightText: Copyright (c) 2020-2025 NVIDIA CORPORATION. All rights reserved.

//

// tegra_audio_graph_card.c - Audio Graph based Tegra Machine Driver

//

// Copyright (c) 2020-2021 NVIDIA CORPORATION.  All rights reserved.



#include <linux/math64.h>

#include <linux/module.h>
@@ -232,11 +231,22 @@ static const struct tegra_audio_cdata tegra186_data = { 
	.plla_out0_rates[x11_RATE] = 45158400,

};



static const struct tegra_audio_cdata tegra264_data = {

	/* PLLA1 */

	.plla_rates[x8_RATE] = 983040000,

	.plla_rates[x11_RATE] = 993484800,

	/* PLLA1_OUT1 */

	.plla_out0_rates[x8_RATE] = 49152000,

	.plla_out0_rates[x11_RATE] = 45158400,

};



static const struct of_device_id graph_of_tegra_match[] = {

	{ .compatible = "nvidia,tegra210-audio-graph-card",

	  .data = &tegra210_data },

	{ .compatible = "nvidia,tegra186-audio-graph-card",

	  .data = &tegra186_data },

	{ .compatible = "nvidia,tegra264-audio-graph-card",

	  .data = &tegra264_data },

	{},

};

MODULE_DEVICE_TABLE(of, graph_of_tegra_match);