aboutsummaryrefslogtreecommitdiff
path: root/sound/soc/soc-dapm.c
AgeCommit message (Collapse)Author
2007-05-11[ALSA] ASoC DAPM switching for reentrant codec pathsSeth Forshee
This patch fixes an issue whereby power was applied to any inactive analog path that would leave and reenter a codec (e.g. ACOP -> ACIN on WM8753). This change now checks for such paths and DAPM will power them down when not in use. Signed-off-by: Seth Forshee <seth.forshee@gmail.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09[ALSA] soc - Clean up with kmemdup()Takashi Iwai
Clean up by replacing with kmemdup(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09[ALSA] soc - 0.13 ASoC DAPM bug fix for unnamed streamsSeth Forshee
This patch fixes a bug whereby an unnamed stream would cause a NULL pointer ref in snd_soc_dapm_stream_event(). Signed-off-by: Seth Forshee <seth.forshee@gmail.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09[ALSA] Solve typos/compilation problems for debug functions in soc-dapm and ↵Raúl Sánchez Siles
at91-i2s soc-dapm ·Removed list_for_each since the loop is list_for_each_entry() and not list_for_each(). Thanks to Liam Girdwood and Seth Forshee. at91-i2s ·Fixed typo in dai modes definition. ·Fixed struct member name in at91_ssc_info->ssc_state. ·Fixed compilation problem, ssc_state is bundled in at91_ssc_info. Signed-off-by: Raúl Sánchez Siles <rss@barracuda.es> Signed-off-by: Seth Forshee <seth.forshee@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09[ALSA] sound/soc/soc-dapm.c: make 4 functions staticAdrian Bunk
Make the following needlessly global functions static: - dapm_power_widgets() - dapm_mux_update_power() - dapm_mixer_update_power() - dapm_free_widgets() Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09[ALSA] ASoC: dynamic audio power management (DAPM)Richard Purdie
This patch adds Dynamic Audio Power Management (DAPM) to ASoC. Dynamic Audio Power Management (DAPM) is designed to allow portable and handheld Linux devices to use the minimum amount of power within the audio subsystem at all times. It is independent of other kernel PM and as such, can easily co-exist with the other PM systems. DAPM is also completely transparent to all user space applications as all power switching is done within the ASoC core. No code changes or recompiling are required for user space applications. DAPM makes power switching decisions based upon any audio stream (capture/playback) activity and audio mixer settings within the device. DAPM spans the whole machine. It covers power control within the entire audio subsystem, this includes internal codec power blocks and machine level power systems. There are 4 power domains within DAPM:- 1. Codec domain - VREF, VMID (core codec and audio power) Usually controlled at codec probe/remove and suspend/resume, although can be set at stream time if power is not needed for sidetone, etc. 2. Platform/Machine domain - physically connected inputs and outputs Is platform/machine and user action specific, is configured by the machine driver and responds to asynchronous events e.g when HP are inserted 3. Path domain - audio subsystem signal paths Automatically set when mixer and mux settings are changed by the user. e.g. alsamixer, amixer. 4. Stream domain - DAC's and ADC's. Enabled and disabled when stream playback/capture is started and stopped respectively. e.g. aplay, arecord. All DAPM power switching decisions are made automatically by consulting an audio routing map of the whole machine. This map is specific to each machine and consists of the interconnections between every audio component (including internal codec components). Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>