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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 <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2011-10-13 19:22:43 +03:00
parent 3b98409eb7
commit 6cc78aa984
1 changed files with 4 additions and 2 deletions
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6
drivers/video/omap2/dss/dsi.c
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@ -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);