linux-kernel - Re: [PATCH] ASoC: tegra: Fix DSPK 16-bit playback

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Date: Mon, 25 Mar 2024 14:41:08 +0100
From: "Thierry Reding" <thierry.reding@...il.com>
To: "Sameer Pujar" <spujar@...dia.com>, <broonie@...nel.org>,
 <linux-sound@...r.kernel.org>
Cc: <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <lgirdwood@...il.com>, <jonathanh@...dia.com>, <mkumard@...dia.com>,
 <stable@...r.kernel.org>
Subject: Re: [PATCH] ASoC: tegra: Fix DSPK 16-bit playback

On Mon Mar 25, 2024 at 11:49 AM CET, Sameer Pujar wrote:
> DSPK configuration is wrong for 16-bit playback and this happens because
> the client config is always fixed at 24-bit in hw_params(). Fix this by
> updating the client config to 16-bit for the respective playback.
>
> Fixes: 327ef6470266 ("ASoC: tegra: Add Tegra186 based DSPK driver")
> Cc: stable@...r.kernel.org
> Signed-off-by: Sameer Pujar <spujar@...dia.com>
> ---
>  sound/soc/tegra/tegra186_dspk.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/sound/soc/tegra/tegra186_dspk.c b/sound/soc/tegra/tegra186_dspk.c
> index aa37c4ab0adb..3a152e76122b 100644
> --- a/sound/soc/tegra/tegra186_dspk.c
> +++ b/sound/soc/tegra/tegra186_dspk.c
> @@ -1,8 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> +// SPDX-FileCopyrightText: Copyright (c) 2020-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
>  //
>  // tegra186_dspk.c - Tegra186 DSPK driver
> -//
> -// Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved.
>  
>  #include <linux/clk.h>
>  #include <linux/device.h>
> @@ -246,6 +245,7 @@ static int tegra186_dspk_hw_params(struct snd_pcm_substream *substream,
>  	switch (params_format(params)) {
>  	case SNDRV_PCM_FORMAT_S16_LE:
>  		cif_conf.audio_bits = TEGRA_ACIF_BITS_16;
> +		cif_conf.client_bits = TEGRA_ACIF_BITS_16;

Do we perhaps want to move the common cif_conf.client_bits assignment
into the S32_LE case now? It doesn't make much sense to have a common
assignment that's overridden for the S16_LE case and only kept for the
only other alternative (S32_LE).

Thierry

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