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ASoC: Intel: sst: Fallback to BYT-CR if IRQ 5 is missing

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Some devices detected as BYT-T by the PMIC-type based detection
have only a single IRQ listed in the 80860F28 ACPI device. This
causes -ENXIO later when attempting to get the IRQ at index 5.
It turns out these devices behave more like BYT-CR devices,
and using the IRQ at index 0 makes sound work correctly.

This patch adds a fallback for these devices to is_byt_cr():
If there is no IRQ resource at index 5, treating the device
as BYT-T is guaranteed to fail later, so we can safely treat
these devices as BYT-CR without breaking any working device.

Link: http://mailman.alsa-project.org/pipermail/alsa-devel/2018-December/143176.html
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Stephan Gerhold 2019-01-02 20:39:06 +01:00 committed by Mark Brown
parent b97205ef95
commit fee1571455
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 14 additions and 2 deletions
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16
sound/soc/intel/atom/sst/sst_acpi.c
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@ -255,8 +255,9 @@ static int is_byt(void)
return status;
}
static bool is_byt_cr(struct device *dev)
static bool is_byt_cr(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int status = 0;
if (!is_byt())
@ -285,6 +286,17 @@ static bool is_byt_cr(struct device *dev)
} else {
dev_info(dev, "IOSF_MBI not available, no BYT-CR detection\n");
}
if (platform_get_resource(pdev, IORESOURCE_IRQ, 5) == NULL) {
/*
* Some devices detected as BYT-T have only a single IRQ listed,
* causing platform_get_irq with index 5 to return -ENXIO.
* The correct IRQ in this case is at index 0, as on BYT-CR.
*/
dev_info(dev, "Falling back to Baytrail-CR platform\n");
return true;
}
return false;
}
@ -331,7 +343,7 @@ static int sst_acpi_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
if (is_byt_cr(dev)) {
if (is_byt_cr(pdev)) {
/* override resource info */
byt_rvp_platform_data.res_info = &bytcr_res_info;
}