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| author | Lu, Han <han.lu@intel.com> | 2015-12-07 15:59:13 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-12-07 09:04:44 +0100 |
| commit | 7c23b7c1996597dd9d60bb282fb5fa1be6ebd18b (patch) | |
| tree | c88af19892551e1e0c3bc8171ffcba1b15c7176f /include | |
| parent | a74a821624c0c75388a193337babd17a8c02c740 (diff) | |
| download | linux-7c23b7c1996597dd9d60bb282fb5fa1be6ebd18b.tar.gz linux-7c23b7c1996597dd9d60bb282fb5fa1be6ebd18b.tar.bz2 linux-7c23b7c1996597dd9d60bb282fb5fa1be6ebd18b.zip | |
ALSA: hda - Fix playback noise with 24/32 bit sample size on BXT
In BXT-P A0, HD-Audio DMA requests is later than expected,
and makes an audio stream sensitive to system latencies when
24/32 bits are playing.
Adjusting threshold of DMA fifo to force the DMA request
sooner to improve latency tolerance at the expense of power.
v2: move Intel specific code to hda_intel.c
Signed-off-by: Lu, Han <han.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/hda_register.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h index 2ae8812d7b1a..94dc6a9772e0 100644 --- a/include/sound/hda_register.h +++ b/include/sound/hda_register.h @@ -93,6 +93,9 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 }; #define AZX_REG_HSW_EM4 0x100c #define AZX_REG_HSW_EM5 0x1010 +/* Skylake/Broxton display HD-A controller Extended Mode registers */ +#define AZX_REG_SKL_EM4L 0x1040 + /* PCI space */ #define AZX_PCIREG_TCSEL 0x44 |