diff --git a/drivers/video/omap2/dss/overlay.c b/drivers/video/omap2/dss/overlay.c index 35ef7d10100e..0377d46acadb 100644 --- a/drivers/video/omap2/dss/overlay.c +++ b/drivers/video/omap2/dss/overlay.c @@ -491,13 +491,18 @@ static int omap_dss_set_manager(struct omap_overlay *ovl, ovl->manager = mgr; dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); - /* XXX: on manual update display, in auto update mode, a bug happens - * here. When an overlay is first enabled on LCD, then it's disabled, - * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT - * errors. Waiting before changing the channel_out fixes it. I'm - * guessing that the overlay is still somehow being used for the LCD, - * but I don't understand how or why. */ - msleep(40); + /* XXX: When there is an overlay on a DSI manual update display, and + * the overlay is first disabled, then moved to tv, and enabled, we + * seem to get SYNC_LOST_DIGIT error. + * + * Waiting doesn't seem to help, but updating the manual update display + * after disabling the overlay seems to fix this. This hints that the + * overlay is perhaps somehow tied to the LCD output until the output + * is updated. + * + * Userspace workaround for this is to update the LCD after disabling + * the overlay, but before moving the overlay to TV. + */ dispc_set_channel_out(ovl->id, mgr->id); dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);