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Message-ID: <2e9f4301-0211-04f5-5b38-caf2be9f4fd1@perex.cz>
Date: Fri, 27 Jan 2023 17:23:12 +0100
From: Jaroslav Kysela <perex@...ex.cz>
To: Mario Limonciello <mario.limonciello@....com>,
Mukunda Vijendar <Vijendar.Mukunda@....com>,
Saba Kareem Syed <Syed.SabaKareem@....com>,
linux-kernel@...r.kernel.org
Cc: Pananchikkal Renjith <Renjith.Pananchikkal@....com>,
Mark Pearson <mpearson@...ovo.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
alsa-devel@...a-project.org
Subject: Re: [PATCH 2/6] ASoC: amd: yc: Add a module parameter to influence
pdm_gain
On 27. 01. 23 17:01, Mario Limonciello wrote:
> In case of regressions for any users that the new pdm_gain value is
> too high and for additional debugging, introduce a module parameter
> that would let them configure it.
>
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
> sound/soc/amd/yc/acp6x-pdm-dma.c | 7 ++++++-
> sound/soc/amd/yc/acp6x.h | 2 +-
> 2 files changed, 7 insertions(+), 2 deletions(-)
...
> pdm_ctrl = acp6x_readl(acp_base + ACP_WOV_MISC_CTRL);
> - pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK;
> + pdm_ctrl |= FIELD_PREP(ACP_WOV_GAIN_CONTROL, pdm_gain);
The bits should be zeroed (AND - &) before OR to make sure that the correct
value is written to the register. More related patches are affected.
> acp6x_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
Jaroslav
--
Jaroslav Kysela <perex@...ex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
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