From db432b414e20b7218bbd91654d7be9c524a4337a Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 3 Oct 2011 21:06:40 +0100 Subject: ASoC: Do DAPM power checks only for widgets changed since last run In order to reduce the number of DAPM power checks we run keep a list of widgets which have been changed since the last DAPM run and iterate over that rather than the full widget list. Whenever we change the power state for a widget we add all the source and sink widgets it has to the dirty list, ensuring that all widgets in the path are checked. This covers more widgets than we need to as some of the neighbour widgets won't be connected but it's simpler as a first step. On one system I tried this gave: Power Path Neighbour Before: 207 1939 2461 After: 114 1066 1327 which seems useful. Signed-off-by: Mark Brown --- include/sound/soc-dapm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/sound/soc-dapm.h') diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index bb5953219d0b..c080635b3c35 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -492,6 +492,7 @@ struct snd_soc_dapm_widget { /* used during DAPM updates */ struct list_head power_list; + struct list_head dirty; }; struct snd_soc_dapm_update { -- cgit v1.2.3