From f1aafdcd42ad45a4bda5cb8f4a6782b0e48549ba Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Wed, 2 Jun 2010 17:31:53 +0300 Subject: OMAP: DSS2: make 50ms bug-fix sleep optional For some unknown reason we may get SYNC_LOST errors from the display subsystem at initialization time if we don't sleep before resetting the DSS. See the source (dss.c) for more comments. However, 50ms is quite long time to sleep, and with some configurations the SYNC_LOST may never happen, so this patch creates a Kconfig option to disable the sleep. Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/dss/Kconfig | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/video/omap2/dss/Kconfig') diff --git a/drivers/video/omap2/dss/Kconfig b/drivers/video/omap2/dss/Kconfig index bfc5da0e970..458cfe12810 100644 --- a/drivers/video/omap2/dss/Kconfig +++ b/drivers/video/omap2/dss/Kconfig @@ -125,4 +125,15 @@ config OMAP2_DSS_MIN_FCK_PER_PCK Max FCK is 173MHz, so this doesn't work if your PCK is very high. +config OMAP2_DSS_SLEEP_BEFORE_RESET + bool "Sleep 50ms before DSS reset" + default y + help + For some unknown reason we may get SYNC_LOST errors from the display + subsystem at initialization time if we don't sleep before resetting + the DSS. See the source (dss.c) for more comments. + + However, 50ms is quite long time to sleep, and with some + configurations the SYNC_LOST may never happen, so the sleep can + be disabled here. endif -- cgit v1.2.3-70-g09d2