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OMAP: DSS2: Remove CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET

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CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET is used to avoid an unclear bug at
DSS reset time. The pm runtime will handle reset in the future, and this
code has to be removed. Hopefully we won't see this error anymore.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2011-05-18 12:58:24 +03:00
parent 7e42403e3b
commit de3050a74e
2 changed files with 0 additions and 25 deletions
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12
drivers/video/omap2/dss/Kconfig
View file

@ -117,18 +117,6 @@ 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.
config OMAP2_DSS_SLEEP_AFTER_VENC_RESET
bool "Sleep 20ms after VENC reset"
default y

13
drivers/video/omap2/dss/dss.c
View file

@ -1037,19 +1037,6 @@ static int omap_dsshw_probe(struct platform_device *pdev)
* the kernel resets it */
omap_writel(omap_readl(0x48050440) & ~0x3, 0x48050440);
#ifdef CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET
/* We need to wait here a bit, otherwise we sometimes start to
* get synclost errors, and after that only power cycle will
* restore DSS functionality. I have no idea why this happens.
* And we have to wait _before_ resetting the DSS, but after
* enabling clocks.
*
* This bug was at least present on OMAP3430. It's unknown
* if it happens on OMAP2 or OMAP3630.
*/
msleep(50);
#endif
_omap_dss_reset();
/* autoidle */