ALSA: hda: Use new non-cached allocation for non-snoop mode

Browse source

Now the ALSA memory allocator helper supports the new non-cached
pages, let's use the new type, SNDRV_DMA_TYPE_DEV_UC_SG, for HD-audio
driver.  This allows us to reduce lots of codes.

As another positive side-effect by this patch, the long-standing issue
with non-snoop mode playing in the non-mmap mode is fixed.  The core
memalloc helper does the proper pgprot setup for non-cached pages for
vmap(), which was missing in the past.

Reported-and-tested-by: Hans Hu <HansHu@zhaoxin.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

...

This commit is contained in:

Takashi Iwai 2018-08-08 22:23:30 +02:00

parent 78c9be61c3

commit fc47814369

3 changed files with 8 additions and 79 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

sound/pci/hda/hda_controller.c

View file

1

sound/pci/hda/hda_controller.h

View file

81

sound/pci/hda/hda_intel.c

View file