ALSA: hda - Move hda_i915.c from sound/pci/hda to sound/hda
The file is moved to hda core and renamed to hdac_i915.c, so can be used
by both legacy HDA driver and new Skylake audio driver.
- Add snd_hdac_ prefix to the public APIs.
- The i915 audio component is moved to core bus and dynamically allocated.
- A static pointer hdac_acomp is used to help bind/unbind callbacks to get
this component, because the sound card's private_data is used by the azx
chip pointer, which is a legacy structure. It could be removed if private
_data changes to some core structure which can be extended to find the
bus.
- snd_hdac_get_display_clk() is added to get the display core clock for
HSW/BDW.
- haswell_set_bclk() is moved to hda_intel.c because it needs to write the
controller registers EM4/EM5, and only legacy HD-A needs it for HSW/BDW.
- Move definition of HSW/BDW-specific registers EM4/EM5 to hda_register.h
and rename them to HSW_EM4/HSW_EM5, because other HD-A controllers have
different layout for the extended mode registers.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/include/sound/hda_i915.h b/include/sound/hda_i915.h
new file mode 100644
index 0000000..adb5ba5
--- /dev/null
+++ b/include/sound/hda_i915.h
@@ -0,0 +1,36 @@
+/*
+ * HD-Audio helpers to sync with i915 driver
+ */
+#ifndef __SOUND_HDA_I915_H
+#define __SOUND_HDA_I915_H
+
+#ifdef CONFIG_SND_HDA_I915
+int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable);
+int snd_hdac_display_power(struct hdac_bus *bus, bool enable);
+int snd_hdac_get_display_clk(struct hdac_bus *bus);
+int snd_hdac_i915_init(struct hdac_bus *bus);
+int snd_hdac_i915_exit(struct hdac_bus *bus);
+#else
+static int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable)
+{
+ return 0;
+}
+static inline int snd_hdac_display_power(struct hdac_bus *bus, bool enable)
+{
+ return 0;
+}
+static inline int snd_hdac_get_display_clk(struct hdac_bus *bus)
+{
+ return 0;
+}
+static inline int snd_hdac_i915_init(struct hdac_bus *bus)
+{
+ return -ENODEV;
+}
+static inline int snd_hdac_i915_exit(struct hdac_bus *bus)
+{
+ return 0;
+}
+#endif
+
+#endif /* __SOUND_HDA_I915_H */
diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h
index 4f6d3fc..0c7536e 100644
--- a/include/sound/hda_register.h
+++ b/include/sound/hda_register.h
@@ -84,6 +84,10 @@
#define AZX_REG_SD_BDLPL 0x18
#define AZX_REG_SD_BDLPU 0x1c
+/* Haswell/Broadwell display HD-A controller Extended Mode registers */
+#define AZX_REG_HSW_EM4 0x100c
+#define AZX_REG_HSW_EM5 0x1010
+
/* PCI space */
#define AZX_PCIREG_TCSEL 0x44
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index b97c59ea..64fff4d 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -11,6 +11,7 @@
#include <sound/core.h>
#include <sound/memalloc.h>
#include <sound/hda_verbs.h>
+#include <drm/i915_component.h>
/* codec node id */
typedef u16 hda_nid_t;
@@ -285,6 +286,10 @@
/* locks */
spinlock_t reg_lock;
struct mutex cmd_mutex;
+
+ /* i915 component interface */
+ struct i915_audio_component *audio_component;
+ int i915_power_refcount;
};
int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
