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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>
This commit is contained in:
Takashi Iwai 2017-04-23 09:22:56 +02:00 committed by Mark Brown
parent 861886d338
commit 9f2cf73ed6
1 changed files with 9 additions and 0 deletions
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9
sound/soc/intel/boards/bytcr_rt5640.c
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@ -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) ||