picodlp projector is supported by OMAP. OMAP4430 SDP and EVM boards have an on board projector called as picodlp projector. picodlp would be connected to display sub system as a display panel. It has a dlp pico processor dpp2600. The panel would be connected using 24 bit parallel interface. GPIO pin 59 called as DISPLAY SELECT pin selects either secondary lcd or picodlp. It is a WVGA panel with 864 X 480 resolution. To know more about picodlp please visit: http://omappedia.org/wiki/PicoDLP_projector_guide GPIO pin settings are required for powering_on the DLP and it is done in board file. The programming sequence states that processor has to send LOW on PWRGOOD (GPIO 45) then wait for a fraction of seconds and then send HIGH. EMU_DONE pin (GPIO 44) would be set to low once the DLP is ready for operation. Configuartion of picodlp involves passing dpp2600 commands through i2c. All these commands are defined in a panel header file. And more info on the commands can be found at: https://focus.ti.com/myti/docs/extranet.tsp?sectionId=403 About DLP (Digital Light Processing): DLP is Texas Instruments award-winning display technology which has powered the worlds top projectors and displays, delivering pictures rich with color, contrast, clarity and brightness to screens of all sizes. Every DLP chip features an array of up to 2.2 million microscopic mirrors that switch at ultra high speeds an innovative advantage that remains cutting edge and ideal for current and future applications alike. The results are high-resolution, highly reliable, razor-sharp images, that even work with fast motion video. To learn more about DLP technology, please visit www.DLP.com picodlp on OMAP4430 boards would make use of same technology. picodlp makes use of i2c bus device at 0x1b address for sending configuration commands to panel. In software picodlp panel driver has an i2c client. To know more about picodlp configuration commands please visit: http://focus.ti.com/lit/ug/dlpu002a/dlpu002a.pdf The link talks more about the timing specific things: http://focus.ti.com/lit/ds/dlps019b/dlps019b.pdf To know more about i2c_client model please visit: http://lxr.linux.no/#linux+v2.6.38/Documentation/i2c/writing-clients ------------------------------------------------------------------------------ These patches have been developed on top of master branch of Tomi's gitorious tree. I am maintaining a gitorious tree for these patches and can be found at: http://gitorious.org/~mayuresh/linux-omap-dss2/mayuresh-picodlp/commits/picodlp The driver has been tested when compiled as a module. Validated with a Penguin logos on OMAP4430 SDP ES2.1 Checkpatch.pl warnings: WARNING: msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt I think this warning can be ignored New compilation warnings introduced: Nil Changes since v3: 1. Changed GPIO handling 2. Moved msleeps at appropriate places ----------------------------------------------------------------------------- Mayuresh Janorkar (3): OMAP: DSS: Adding a header file for picodlp data OMAP4: DSS: Adding a picodlp in OMAP4430 SDP board file OMAP: DSS: Add picodlp panel driver Mythri P K (1): OMAP: DSS: Adding a picodlp header file arch/arm/mach-omap2/board-4430sdp.c | 59 +++ arch/arm/plat-omap/include/plat/panel-picodlp.h | 23 + drivers/video/omap2/displays/Kconfig | 7 + drivers/video/omap2/displays/Makefile | 1 + drivers/video/omap2/displays/panel-picodlp.c | 614 +++++++++++++++++++++++ drivers/video/omap2/displays/panel-picodlp.h | 288 +++++++++++ 6 files changed, 992 insertions(+), 0 deletions(-) create mode 100644 arch/arm/plat-omap/include/plat/panel-picodlp.h create mode 100644 drivers/video/omap2/displays/panel-picodlp.c create mode 100644 drivers/video/omap2/displays/panel-picodlp.h -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
