Flush posted write between writing the ULPS enable bits and waiting for
the interrupt.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
---
drivers/video/omap2/dss/dsi.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 5abf8e7..1331f92 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -3561,6 +3561,9 @@ static int dsi_enter_ulps(struct platform_device *dsidev)
REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, (1 << 0) | (1 << 1) | (1 << 2),
7, 5);
+ /* flush posted write and wait for SCP interface to finish the write */
+ dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2);
+
if (wait_for_completion_timeout(&completion,
msecs_to_jiffies(1000)) == 0) {
DSSERR("ULPS enable timeout\n");
@@ -3575,6 +3578,9 @@ static int dsi_enter_ulps(struct platform_device *dsidev)
REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, (0 << 0) | (0 << 1) | (0 << 2),
7, 5);
+ /* flush posted write and wait for SCP interface to finish the write */
+ dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2);
+
dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS);
dsi_if_enable(dsidev, false);
--
1.7.4.1
--
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