Add a way check to whether HD audio is enabled. Use ioctl() to avoid
adding too many unusual operations to PCH.
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/x86/cpu/ivybridge/bd82x6x.c | 19 +++++++++++++++++++
include/pch.h | 3 +++
2 files changed, 22 insertions(+)
diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index a78bb02544..7d16294a5e 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -212,10 +212,29 @@ static int bd82x6x_get_gpio_base(struct udevice *dev, u32
*gbasep)
return 0;
}
+static int bd82x6x_ioctl(struct udevice *dev, enum pch_req_t req, void *data,
+ int size)
+{
+ u32 rcba, val;
+
+ switch (req) {
+ case PCH_REQ_HDA_CONFIG:
+ dm_pci_read_config32(dev, PCH_RCBA, &rcba);
+ val = readl(rcba + 0x2030);
+ if (!(val & (1U << 31)))
+ return -ENOENT;
+
+ return val & 0xfe;
+ default:
+ return -ENOSYS;
+ }
+}
+
static const struct pch_ops bd82x6x_pch_ops = {
.get_spi_base = bd82x6x_pch_get_spi_base,
.set_spi_protect = bd82x6x_set_spi_protect,
.get_gpio_base = bd82x6x_get_gpio_base,
+ .ioctl = bd82x6x_ioctl,
};
static const struct udevice_id bd82x6x_ids[] = {
diff --git a/include/pch.h b/include/pch.h
index c9995702c1..d1a8131794 100644
--- a/include/pch.h
+++ b/include/pch.h
@@ -13,6 +13,9 @@
/* All the supported PCH ioctls */
enum pch_req_t {
+ /* Returns HDA config info if Azalia V1CTL enabled, -ENOENT if not */
+ PCH_REQ_HDA_CONFIG,
+
PCH_REQ_TEST1, /* Test requests for sandbox driver */
PCH_REQ_TEST2,
PCH_REQ_TEST3,
--
2.20.1.321.g9e740568ce-goog
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