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FB overlay using alpha surface (i.MX 6SoloX)

Question asked by tos319 on Dec 12, 2016
Latest reply on Dec 13, 2016 by tos319

I am using IMX6SXSABRESD platform (imx-4.1.15-1.0.0_ga). I'd like to use overlay functionality of LCD Interface. I thought that fb1 is used for overlay surface and fb0 is used for background surface. I don't know how to control ALPHA_CTRL (embedded/override/multiply/rops) specified in the RM (page 2512 of IMX6SXRM.pdf  Rev.1, 6/2016). Someone can explain how to use/control overlay on MX6SX?