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Diffstat (limited to 'sound/hda/hdac_i915.c')
-rw-r--r--sound/hda/hdac_i915.c69
1 files changed, 45 insertions, 24 deletions
diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
index 3c2db3816029..454474ac5716 100644
--- a/sound/hda/hdac_i915.c
+++ b/sound/hda/hdac_i915.c
@@ -11,9 +11,7 @@
#include <sound/hda_i915.h>
#include <sound/hda_register.h>
-static struct completion bind_complete;
-
-#define CONTROLLER_IN_GPU(pci) (((pci)->device == 0x0a0c) || \
+#define IS_HSW_CONTROLLER(pci) (((pci)->device == 0x0a0c) || \
((pci)->device == 0x0c0c) || \
((pci)->device == 0x0d0c) || \
((pci)->device == 0x160c))
@@ -41,7 +39,7 @@ void snd_hdac_i915_set_bclk(struct hdac_bus *bus)
if (!acomp || !acomp->ops || !acomp->ops->get_cdclk_freq)
return; /* only for i915 binding */
- if (!CONTROLLER_IN_GPU(pci))
+ if (!IS_HSW_CONTROLLER(pci))
return; /* only HSW/BDW */
cdclk_freq = acomp->ops->get_cdclk_freq(acomp->dev);
@@ -73,11 +71,49 @@ void snd_hdac_i915_set_bclk(struct hdac_bus *bus)
}
EXPORT_SYMBOL_GPL(snd_hdac_i915_set_bclk);
+/* returns true if the devices can be connected for audio */
+static bool connectivity_check(struct pci_dev *i915, struct pci_dev *hdac)
+{
+ struct pci_bus *bus_a = i915->bus, *bus_b = hdac->bus;
+
+ /* directly connected on the same bus */
+ if (bus_a == bus_b)
+ return true;
+
+ /*
+ * on i915 discrete GPUs with embedded HDA audio, the two
+ * devices are connected via 2nd level PCI bridge
+ */
+ bus_a = bus_a->parent;
+ bus_b = bus_b->parent;
+ if (!bus_a || !bus_b)
+ return false;
+ bus_a = bus_a->parent;
+ bus_b = bus_b->parent;
+ if (bus_a && bus_a == bus_b)
+ return true;
+
+ return false;
+}
+
static int i915_component_master_match(struct device *dev, int subcomponent,
void *data)
{
- return !strcmp(dev->driver->name, "i915") &&
- subcomponent == I915_COMPONENT_AUDIO;
+ struct pci_dev *hdac_pci, *i915_pci;
+ struct hdac_bus *bus = data;
+
+ if (!dev_is_pci(dev))
+ return 0;
+
+ hdac_pci = to_pci_dev(bus->dev);
+ i915_pci = to_pci_dev(dev);
+
+ if (!strcmp(dev->driver->name, "i915") &&
+ subcomponent == I915_COMPONENT_AUDIO &&
+ connectivity_check(i915_pci, hdac_pci))
+ return 1;
+
+ return 0;
}
/* check whether intel graphics is present */
@@ -92,19 +128,6 @@ static bool i915_gfx_present(void)
return pci_dev_present(ids);
}
-static int i915_master_bind(struct device *dev,
- struct drm_audio_component *acomp)
-{
- complete_all(&bind_complete);
- /* clear audio_ops here as it was needed only for completion call */
- acomp->audio_ops = NULL;
- return 0;
-}
-
-static const struct drm_audio_component_audio_ops i915_init_ops = {
- .master_bind = i915_master_bind
-};
-
/**
* snd_hdac_i915_init - Initialize i915 audio component
* @bus: HDA core bus
@@ -125,9 +148,7 @@ int snd_hdac_i915_init(struct hdac_bus *bus)
if (!i915_gfx_present())
return -ENODEV;
- init_completion(&bind_complete);
-
- err = snd_hdac_acomp_init(bus, &i915_init_ops,
+ err = snd_hdac_acomp_init(bus, NULL,
i915_component_master_match,
sizeof(struct i915_audio_component) - sizeof(*acomp));
if (err < 0)
@@ -139,8 +160,8 @@ int snd_hdac_i915_init(struct hdac_bus *bus)
if (!IS_ENABLED(CONFIG_MODULES) ||
!request_module("i915")) {
/* 60s timeout */
- wait_for_completion_timeout(&bind_complete,
- msecs_to_jiffies(60 * 1000));
+ wait_for_completion_timeout(&acomp->master_bind_complete,
+ msecs_to_jiffies(60 * 1000));
}
}
if (!acomp->ops) {