linux/sound
Daniel Glöckner 55c63bd256 ALSA: provide a more useful get_unmapped_area handler for pcm
Shared memory mappings on nommu machines require a get_unmapped_area
file operation that suggests an address for the mapping. The current
implementation returns 0 and thus forces the driver to implement an
mmap handler that fixes up the start and end address of the vma.

This patch returns the address of the dma buffer, so it should work
out of the box for all drivers that use the snd_pcm_runtime->dma_area
pointer.

Addresses for mapping the status and control pages are returned as
well, but to make those work the conditional compilation of
snd_pcm_mmap_{status,control} would need to be revised.

URL: http://thread.gmane.org/gmane.linux.alsa.devel/61230
Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-10 09:05:03 +01:00
..
aoa of: unify phandle name in struct device_node 2010-01-28 14:06:53 -07:00
arm ALSA: sound/arm: Fix build failure caused by missing struct aaci definition 2009-12-26 10:16:07 +01:00
atmel ALSA: snd-atmel-abdac: increase periods_min to 6 instead of 4 2009-04-06 03:56:28 +02:00
core ALSA: provide a more useful get_unmapped_area handler for pcm 2010-03-10 09:05:03 +01:00
drivers Merge remote branch 'alsa/devel' into topic/misc 2010-02-12 10:42:38 +01:00
i2c Merge branch 'topic/hda' into for-linus 2009-12-04 16:22:45 +01:00
isa ALSA: fix jazz16 compile (udelay) 2010-03-05 08:13:20 +01:00
mips ALSA: pcm - Call pgprot_noncached() for vmalloc'ed buffers 2010-01-18 15:00:34 +01:00
oss Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 2010-03-08 07:34:26 -08:00
parisc ALSA: sound/parisc: Move dereference after NULL test 2009-10-30 12:01:38 +01:00
pci Merge branch 'topic/misc' into for-linus 2010-03-08 09:35:50 +01:00
pcmcia ALSA: pcm - Call pgprot_noncached() for vmalloc'ed buffers 2010-01-18 15:00:34 +01:00
ppc of: add 'of_' prefix to machine_is_compatible() 2010-02-09 08:33:00 -07:00
sh Merge branch 'topic/beep-rename' into topic/core-change 2009-12-01 15:58:10 +01:00
soc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 2010-03-08 07:34:26 -08:00
sparc ALSA: Add missing SNDRV_PCM_INFO_BATCH flag to some drivers 2009-04-28 15:06:44 +02:00
spi ALSA: Convert to snd_card_create() in other sound/* 2009-01-12 15:21:19 +01:00
synth tree-wide: fix typos "couter" -> "counter" 2009-12-04 15:39:51 +01:00
usb ALSA: usbaudio - remove debug "SAMPLE BYTES" printk line 2010-03-03 22:40:04 +01:00
ac97_bus.c
Kconfig tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
last.c
Makefile ALSA: Add Atmel ALSA drivers directory 2009-02-05 15:08:53 +01:00
sound_core.c ALSA: use subsys_initcall for sound core instead of module_init 2010-01-14 21:21:47 +01:00
sound_firmware.c