From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Cheng-Yi Chiang <cychiang@chromium.org>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
alsa-devel@alsa-project.org, tzungbi@chromium.org,
linux-kernel@vger.kernel.org, Stephen Boyd <swboyd@chromium.org>,
Hung-Te Lin <hungte@chromium.org>,
sathya.prakash.m.r@intel.com, Mark Brown <broonie@kernel.org>,
Sean Paul <seanpaul@chromium.org>,
Shuming Fan <shumingf@realtek.com>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
dgreid@chromium.org, Guenter Roeck <linux@roeck-us.net>
Subject: Re: [alsa-devel] [PATCH v2] firmware: vpd: Add an interface to read VPD value
Date: Tue, 8 Oct 2019 14:06:49 +0200 [thread overview]
Message-ID: <20191008120649.GC2761030@kroah.com> (raw)
In-Reply-To: <20191008101144.39342-1-cychiang@chromium.org>
On Tue, Oct 08, 2019 at 06:11:44PM +0800, Cheng-Yi Chiang wrote:
> Add an interface for other driver to query VPD value.
> This will be used for ASoC machine driver to query calibration
> data stored in VPD for smart amplifier speaker resistor
> calibration.
>
> The example usage in ASoC machine driver is like:
>
> #define DSM_CALIB_KEY "dsm_calib"
> static int load_calibration_data(struct cml_card_private *ctx) {
> char *data = NULL;
> int ret;
> u32 value_len;
>
> /* Read calibration data from VPD. */
> ret = vpd_attribute_read(1, DSM_CALIB_KEY,
> (u8 **)&data, &value_len);
>
> /* Parsing of this string...*/
> }
>
>
> Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
> ---
I can't take this patch without a real user of this function in the
kernel tree at the same time. Please submit it as part of a patch
series with that change as well.
thanks,
greg k-h
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next prev parent reply other threads:[~2019-10-08 12:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-08 10:11 [alsa-devel] [PATCH v2] firmware: vpd: Add an interface to read VPD value Cheng-Yi Chiang
2019-10-08 12:06 ` Greg Kroah-Hartman [this message]
2019-10-08 12:10 ` Cheng-yi Chiang
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