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authorTomi Valkeinen <tomi.valkeinen@ti.com>2011-05-31 15:55:47 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2011-07-01 11:05:47 +0200
commit8ef0e614b3ed2e2daf7e9cefd9a2f12652f824bc (patch)
tree01dd274b72f5b5777b78fed355bfd200f7d820f1 /drivers/video/omap2
parentOMAP: DSS2: Taal: Make driver more fault tolerant (diff)
downloadlinux-8ef0e614b3ed2e2daf7e9cefd9a2f12652f824bc.tar.xz
linux-8ef0e614b3ed2e2daf7e9cefd9a2f12652f824bc.zip
OMAP: DSS2: Reset LANEx_ULPS_SIG2 bits after use
LANEx_ULPS_SIG2 bits are left on after entering ULPS. This doesn't cause any problems currently, as DSI HW is reset when it is enabled. However, if the reset is not done, operation fails if the bits are still set. So reset the bits after entering ULPS to ensure operation even without HW reset. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2')
-rw-r--r--drivers/video/omap2/dss/dsi.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 69c2d4fe0746..4496d09315c9 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -3395,6 +3395,10 @@ static int dsi_enter_ulps(struct platform_device *dsidev)
dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
+ /* Reset LANEx_ULPS_SIG2 */
+ REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, (0 << 0) | (0 << 1) | (0 << 2),
+ 7, 5);
+
dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS);
dsi_if_enable(dsidev, false);