There's a 20ms sleep after VENC reset. It's unknown what bug this
circumvents and on what platforms. Add a Kconfig option to disable the
sleep.
Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
---
drivers/video/omap2/dss/Kconfig | 12 ++++++++++++
drivers/video/omap2/dss/venc.c | 3 +++
2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/Kconfig b/drivers/video/omap2/dss/Kconfig
index 458cfe1..5b45c0c 100644
--- a/drivers/video/omap2/dss/Kconfig
+++ b/drivers/video/omap2/dss/Kconfig
@@ -136,4 +136,16 @@ config OMAP2_DSS_SLEEP_BEFORE_RESET
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
+ help
+ There is a 20ms sleep after VENC reset which seemed to fix the
+ reset. The reason for the bug is unclear, and it's also unclear
+ on what platforms this happens.
+
+ This option enables the sleep, and is enabled by default. You can
+ disable the sleep if it doesn't cause problems on your platform.
+
endif
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 8e35a5b..8c7af90 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -373,8 +373,11 @@ static void venc_reset(void)
}
}
+#ifdef CONFIG_OMAP2_DSS_SLEEP_AFTER_VENC_RESET
/* the magical sleep that makes things work */
+ /* XXX more info? What bug this circumvents? */
msleep(20);
+#endif
}
static void venc_enable_clocks(int enable)
--
1.7.1
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