From 6cc78aa9843155c89faa93231332a8b3817020df Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Thu, 13 Oct 2011 19:22:43 +0300 Subject: [PATCH] OMAPDSS: DSI: disable DDR_CLK_ALWAYS_ON when entering ULPS ULPS cannot be entered if the DDR clk is enabled. Thus disable the DDR clk before entering ULPS. Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/dss/dsi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index a01a0119cc7a..9bcb5c2511df 100644 --- a/drivers/video/omap2/dss/dsi.c +++ b/drivers/video/omap2/dss/dsi.c @@ -3544,9 +3544,11 @@ static int dsi_enter_ulps(struct platform_device *dsidev) if (dsi->ulps_enabled) return 0; + /* DDR_CLK_ALWAYS_ON */ if (REG_GET(dsidev, DSI_CLK_CTRL, 13, 13)) { - DSSERR("DDR_CLK_ALWAYS_ON enabled when entering ULPS\n"); - return -EIO; + dsi_if_enable(dsidev, 0); + REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13); + dsi_if_enable(dsidev, 1); } dsi_sync_vc(dsidev, 0); -- 2.20.1