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.ht... Signed-off-by: Stephan Gerhold stephan@gerhold.net --- Changes in v2: Always run pmic-based detection, apply fallback last (if it wasn't positive).
sound/soc/intel/atom/sst/sst_acpi.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/sound/soc/intel/atom/sst/sst_acpi.c b/sound/soc/intel/atom/sst/sst_acpi.c index 9eaac450f864..ae17ce4677a5 100644 --- a/sound/soc/intel/atom/sst/sst_acpi.c +++ b/sound/soc/intel/atom/sst/sst_acpi.c @@ -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; }