linux-kernel - Re: [PATCH] ASoC: tegra: Revert fix for uninitialized flat cache warning in tegra210

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Message-ID: <41cb1bac-5503-4765-b45a-200963448e5a@nvidia.com>
Date: Wed, 17 Dec 2025 13:40:15 +0000
From: Jon Hunter <jonathanh@...dia.com>
To: "Sheetal ." <sheetal@...dia.com>, linux-sound@...r.kernel.org,
 Mark Brown <broonie@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>, Jaroslav Kysela <perex@...ex.cz>,
 Takashi Iwai <tiwai@...e.com>, Thierry Reding <thierry.reding@...il.com>,
 Charles Keepax <ckeepax@...nsource.cirrus.com>, linux-tegra@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: tegra: Revert fix for uninitialized flat cache
 warning in tegra210_ahub


On 17/12/2025 13:25, Sheetal . wrote:
> From: sheetal <sheetal@...dia.com>
> 
> Commit 4d4021b0bbd1 ("ASoC: tegra: Fix uninitialized flat cache warning
> in tegra210_ahub") attempted to fix the uninitialized flat cache warning
> that is observed for the Tegra210 AHUB driver. However, the change broke
> various audio tests because an -EBUSY error is returned when accessing
> registers from cache before they are read from hardware. Revert this
> change for now, until a proper fix is available.
> 
> Fixes: 4d4021b0bbd1 ("ASoC: tegra: Fix uninitialized flat cache warning in tegra210_ahub")
> Signed-off-by: sheetal <sheetal@...dia.com>
> ---
>   sound/soc/tegra/tegra210_ahub.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra210_ahub.c b/sound/soc/tegra/tegra210_ahub.c
> index 261d9067d27b..e795907a3963 100644
> --- a/sound/soc/tegra/tegra210_ahub.c
> +++ b/sound/soc/tegra/tegra210_ahub.c
> @@ -2077,7 +2077,7 @@ static const struct regmap_config tegra210_ahub_regmap_config = {
>   	.val_bits		= 32,
>   	.reg_stride		= 4,
>   	.max_register		= TEGRA210_MAX_REGISTER_ADDR,
> -	.cache_type		= REGCACHE_FLAT_S,
> +	.cache_type		= REGCACHE_FLAT,
>   };
>   
>   static const struct regmap_config tegra186_ahub_regmap_config = {
> @@ -2085,7 +2085,7 @@ static const struct regmap_config tegra186_ahub_regmap_config = {
>   	.val_bits		= 32,
>   	.reg_stride		= 4,
>   	.max_register		= TEGRA186_MAX_REGISTER_ADDR,
> -	.cache_type		= REGCACHE_FLAT_S,
> +	.cache_type		= REGCACHE_FLAT,
>   };
>   
>   static const struct regmap_config tegra264_ahub_regmap_config = {
> @@ -2094,7 +2094,7 @@ static const struct regmap_config tegra264_ahub_regmap_config = {
>   	.reg_stride		= 4,
>   	.writeable_reg		= tegra264_ahub_wr_reg,
>   	.max_register		= TEGRA264_MAX_REGISTER_ADDR,
> -	.cache_type		= REGCACHE_FLAT_S,
> +	.cache_type		= REGCACHE_FLAT,
>   };
>   
>   static const struct tegra_ahub_soc_data soc_data_tegra210 = {


Acked-by: Jon Hunter <jonathanh@...dia.com>

Thanks!
Jon
-- 
nvpublic