On 4/23/17 2:22 AM, Takashi Iwai wrote:
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@xxxxxxx>
---
v1->v2: override the quirk value completely
v2->v3: print the override information
sound/soc/intel/boards/bytcr_rt5640.c | 9 +++++++++
1 file changed, 9 insertions(+)
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);
I was talking about a more complete message that would e.g check if
MCLK_EN is set when MCLK_25MHZ is set, etc.
I'll add a follow-up patch, for now
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
+ byt_rt5640_quirk = quirk_override;
+ }
log_quirks(&pdev->dev);
if ((byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) ||
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