From nobody Wed Dec 17 01:23:28 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D394714003; Wed, 17 Jan 2024 09:03:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705482224; cv=none; b=I1x+Cf662Me76NKKCOJGfzH3Z27wmvRifBdb5Xq/oopDx6MG+Uf8RQH818V0MAIuzdsJYUwOV3e5td5ZG09+LdVHp4C4CEZ67Mm16bV4fBjqhbgpHG16Ol1P2wXEVcu8bXlkidrZwWlAKKy3Kl85CMWQ+wSxmQmFsSUB+6ZfyUY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705482224; c=relaxed/simple; bh=ubf+Lb9lWCl+Bw/cYPU6tgtajk7KlSOrM82ga/TBaGE=; h=Received:DKIM-Signature:Received:From:To:Cc:Subject:Date: Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; b=RyMcKKTzrRAqR/m2B1K/w+H87CrTe5YOsg/16TEcQe4Z4SZWDfEtb8wZJwsr+2mshCBe8Vo3LOFMP5g7ZOB9kU31wVowpkbnWnqHcUKHvNPG4KIQAsQrvS0sPNBN8dADueM4DscklZjydUPxbmT8YQIOp2JmOKE22hiUHZ6YsOs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ul+i8Cpz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ul+i8Cpz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79CFBC433F1; Wed, 17 Jan 2024 09:03:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705482224; bh=ubf+Lb9lWCl+Bw/cYPU6tgtajk7KlSOrM82ga/TBaGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ul+i8CpzEGX31XDcKOWiMUk/Mx/cPUlWS3k1ZWXNcmO+13+g+43kk7k7zsDou3Jqx 2HCVy13ILqrFrpytfP7xQS4Q+s8uzGzVqomaFETJqYRFKTjMvHusVASImqm9CWLX1N HehEQcPMuOqpl8a/ZtW8lbbHdsU/PTb7d1fzDWjHi1fcOqHQlAJLy7IY1eHnJEGtKc uoQ9nmJxOhlhDfMz1RZZ6inqcS/ExtArgXGmWGG5CEgzHiKxkVos9PSHsNPOYpFjOR CzOuBnP7tlysEahDt+IyNQsbzoAVuEK1jjTUo31B9chHBTTutQzmXUQdXj7Gf0Tigb MMXYGK3cBqq+g== Received: from johan by xi.lan with local (Exim 4.96.2) (envelope-from ) id 1rQ1pt-00086U-03; Wed, 17 Jan 2024 10:03:49 +0100 From: Johan Hovold To: Mark Brown Cc: Srinivas Kandagatla , Banajit Goswami , Liam Girdwood , Jaroslav Kysela , Takashi Iwai , alsa-devel@alsa-project.org, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable@vger.kernel.org Subject: [PATCH v2 1/3] ASoC: qcom: sc8280xp: limit speaker volumes Date: Wed, 17 Jan 2024 10:03:29 +0100 Message-ID: <20240117090331.31111-2-johan+linaro@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240117090331.31111-1-johan+linaro@kernel.org> References: <20240117090331.31111-1-johan+linaro@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The current UCM configuration sets the speaker PA volume to 15 dB when enabling the speakers but this does not prevent the user from increasing the volume further. Limit the PA volume to 15 dB in the machine driver to reduce the risk of speaker damage until we have active speaker protection in place. Note that this will probably need to be generalised using machine-specific limits, but a common limit should do for now. Cc: stable@vger.kernel.org # 6.5 Reviewed-by: Srinivas Kandagatla Signed-off-by: Johan Hovold --- sound/soc/qcom/sc8280xp.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c index ed4bb551bfbb..aa43903421f5 100644 --- a/sound/soc/qcom/sc8280xp.c +++ b/sound/soc/qcom/sc8280xp.c @@ -32,12 +32,14 @@ static int sc8280xp_snd_init(struct snd_soc_pcm_runtime= *rtd) case WSA_CODEC_DMA_RX_0: case WSA_CODEC_DMA_RX_1: /* - * set limit of 0dB on Digital Volume for Speakers, - * this can prevent damage of speakers to some extent without - * active speaker protection + * Set limit of 0 dB on Digital Volume and 15 dB on PA Volume + * to reduce the risk of speaker damage until we have active + * speaker protection in place. */ snd_soc_limit_volume(card, "WSA_RX0 Digital Volume", 84); snd_soc_limit_volume(card, "WSA_RX1 Digital Volume", 84); + snd_soc_limit_volume(card, "SpkrLeft PA Volume", 12); + snd_soc_limit_volume(card, "SpkrRight PA Volume", 12); break; default: break; --=20 2.41.0