Emilio,
Also, I attached a test I was running today. Can you build it and test it on your board 1) wtih CONFIG_OMAP2_DSS_USE_DSI_PLL amd 2) with CONFIG_OMAP2_DSS_USE_DSI_PLL disabled. Make sure you pass omapdss.debug=y in your kernel bootargs. Send me the logs from each of these tests.
(Please visit the site to view this file)
Regards,
Josh