linux-kernel - Re: [PATCH v3 0/6] Fix default DMIC gain on AMD PDM drivers

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Date:   Tue, 31 Jan 2023 19:51:11 +0100
From:   Jaroslav Kysela <perex@...ex.cz>
To:     Mario Limonciello <mario.limonciello@....com>,
        Jaroslav Kysela <jkysela@...hat.com>,
        Mukunda Vijendar <Vijendar.Mukunda@....com>,
        Saba Kareem Syed <Syed.SabaKareem@....com>
Cc:     linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        Mark Pearson <mpearson@...ovo.com>,
        Pananchikkal Renjith <Renjith.Pananchikkal@....com>
Subject: Re: [PATCH v3 0/6] Fix default DMIC gain on AMD PDM drivers

On 31. 01. 23 19:46, Mario Limonciello wrote:
> It's been reported that a number of laptops have a low volume
> level from the digital microphone compared to Windows.
> 
> AMD offers a register that can adjust the gain for PDM which is not
> configured at maximum gain by default.
> 
> To fix this change the default for all 3 drivers to raise the gain
> but also offer a module parameter. The module parameter can be used
> for debugging if the gain is too high on a given laptop.
> 
> This is intentionally split into multiple patches for default and
> parameter so that if the default really does behave better universally
> we can bring it back to stable too later.
> 
> v2->v3:
>   * Use clamp and clear properly
> 
> Mario Limonciello (6):
>    ASoC: amd: yc: Adjust the gain for PDM DMIC
>    ASoC: amd: yc: Add a module parameter to influence pdm_gain
>    ASoC: amd: renoir: Adjust the gain for PDM DMIC
>    ASoC: amd: renoir: Add a module parameter to influence pdm_gain
>    ASoC: amd: ps: Adjust the gain for PDM DMIC
>    ASoC: amd: ps: Add a module parameter to influence pdm_gain

For all patches:

Reviewed-by: Jaroslav Kysela <perex@...ex.cz>

-- 
Jaroslav Kysela <perex@...ex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.