On Wed, 2011-04-20 at 11:13 +0530, Archit Taneja wrote: > On Tuesday 19 April 2011 02:52 PM, Valkeinen, Tomi wrote: > > ULPS (Ultra-Low Power State) is a power saving method for DSI bus. When the > > ULPS is entered, the host sends an ULPS entry sequence and pulls the DSI > > lines > > down. On ULPS exit, the host sends an exit sequence and continues normal > > operation. This allows both the host and the DSI peripheral to save some > > power > > while in ULPS. > > > > This patch set implements ULPS support for DSS2. ULPS can be used with DSI > > command mode displays, and as command mode displays can refresh the panel > > independently using its own framebuffer, entering ULPS allows OMAP DSS HW > > to be > > totally turned off while the image on the display stays. This in turn may > > allow > > OMAP to enter deep sleep. > > > > Taal panel driver implements an inactivity timer which is used to enter ULPS > > after a certain period. The period can configured via sysfs, "ulps_timeout" > > file. A good value for the ulps_timeout depends on the use case and board, > > but > > is most likely around 100-500ms. > > > > The patch set does not enable the ULPS timeout, but it has to be enabled > > either > > manually via sysfs or from the board file. > > > > Tested on OMAP 4430 Blaze board. The patches are based on the current DSS2 > > master branch. > > Tested on 4430sdp and 3430sdp with Taal Panel.
Thanks. I've applied the ULPS patch set to my master branch. Tomi -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
