ULPS cannot be entered if the DDR clk is enabled. Thus disable the DDR
clk before entering ULPS.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
---
drivers/video/omap2/dss/dsi.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index a01a011..9bcb5c2 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);
--
1.7.4.1
--
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