Commit 287599cf authored by Jerome Anand's avatar Jerome Anand Committed by Takashi Iwai

ALSA: add Intel HDMI LPE audio driver for BYT/CHT-T

On Baytrail and Cherrytrail, HDaudio may be fused out or disabled
by the BIOS. This driver enables an alternate path to the i915
display registers and DMA.

Although there is no hardware path between i915 display and LPE/SST
audio clusters, this HDMI capability is referred to in the documentation
as "HDMI LPE Audio" so we keep the name for consistency. There is no
hardware path or control dependencies with the LPE/SST DSP functionality.

The hdmi-lpe-audio driver will be probed when the i915 driver creates
a child platform device.

Since this driver is neither SoC nor PCI, a new x86 folder is added
Additional indirections in the code will be cleaned up in the next series
to aid smoother DP integration
Signed-off-by: Pierre Bossart's avatarPierre-Louis Bossart <[email protected]>
Signed-off-by: default avatarJerome Anand <[email protected]>
Signed-off-by: default avatarTakashi Iwai <[email protected]>
parent 46d196ec
......@@ -108,6 +108,8 @@ source "sound/parisc/Kconfig"
source "sound/soc/Kconfig"
source "sound/x86/Kconfig"
endif # SND
menuconfig SOUND_PRIME
......@@ -5,7 +5,7 @@ obj-$(CONFIG_SOUND) += soundcore.o
obj-$(CONFIG_SOUND_PRIME) += oss/
obj-$(CONFIG_DMASOUND) += oss/
obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \
firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/
firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/ x86/
obj-$(CONFIG_SND_AOA) += aoa/
# This one must be compilable even if sound is configured out
menuconfig SND_X86
tristate "X86 sound devices"
depends on X86
X86 sound devices that don't fall under SoC or PCI categories
if SND_X86
tristate "HDMI audio without HDaudio on Intel Atom platforms"
depends on DRM_I915
Choose this option to support HDMI LPE Audio mode
endif # SND_X86
snd-hdmi-lpe-audio-objs += \
obj-$(CONFIG_HDMI_LPE_AUDIO) += snd-hdmi-lpe-audio.o
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