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| author | Takashi Iwai <tiwai@suse.de> | 2017-04-23 09:22:56 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-04-24 18:48:07 +0100 |
| commit | 9f2cf73ed65b598514e4858ca3d602710718ab93 (patch) | |
| tree | 7a856acca1f7ad37aed17142403b3e44c8f7f889 /sound | |
| parent | 861886d338f7dd802be972e770a695bba62f397a (diff) | |
| download | linux-9f2cf73ed65b598514e4858ca3d602710718ab93.tar.bz2 | |
ASoC: bytcr_rt5640: Allow quirk set via module option
The bytcr-rt5640 driver has a few quirk setups depending on the board,
where the quirk value is set by DMI matching. When you have a new
device to add the support, you often experience to try the different
quirk by trial-and-error. Or, you may have a development model that
still has no proper DMI string. In either case, you'd need to compile
the driver at each time.
This patch introduces a module option to override the quirk value on
the fly. User can boot like snd-soc-sst-bytcr-rt5640.quirk=0x4004 to
override the default value without recompilation. It's a raw value,
so user needs to check the source code for the meaning of each bit.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/intel/boards/bytcr_rt5640.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c index 5c7219fb3aa8..0ac32788f216 100644 --- a/sound/soc/intel/boards/bytcr_rt5640.c +++ b/sound/soc/intel/boards/bytcr_rt5640.c @@ -19,6 +19,7 @@ #include <linux/init.h> #include <linux/module.h> +#include <linux/moduleparam.h> #include <linux/platform_device.h> #include <linux/acpi.h> #include <linux/device.h> @@ -58,6 +59,9 @@ struct byt_rt5640_private { }; static unsigned long byt_rt5640_quirk = BYT_RT5640_MCLK_EN; +static unsigned int quirk_override; +module_param_named(quirk, quirk_override, int, 0444); +MODULE_PARM_DESC(quirk, "Board-specific quirk override"); static void log_quirks(struct device *dev) { @@ -806,6 +810,11 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev) /* check quirks before creating card */ dmi_check_system(byt_rt5640_quirk_table); + if (quirk_override) { + dev_info(&pdev->dev, "Overriding quirk %0x => 0x%x\n", + (unsigned int)byt_rt5640_quirk, quirk_override); + byt_rt5640_quirk = quirk_override; + } log_quirks(&pdev->dev); if ((byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) || |