Hi, On Friday 03 June 2011 03:30 PM, Valkeinen, Tomi wrote:
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@xxxxxx> --- drivers/video/omap2/dss/dsi.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index 69c2d4f..4496d09 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); +
We may need to reset more lanes based on the number of lanes the panel is using. We could calculate a mask here instead.
Archit
dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS); dsi_if_enable(dsidev, false);
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