99f7247211
Since the used AM3352 SoC doesn't have GPU it isn't allways necessary to build in complete drm-stuff into linux kernel. In very small applications only we use the simple-framebuffer. So we have 2 use-cases: - device operating on drm-driver (let simplefb node disabled) - device operating on simplefb-driver (activate simplefb node and reserve mem) The decision is made by means of "simplefb" environment variable. simplefb = 0 we don't enable the (maybe) existing simplefb node and all the rest around display is up to the linux-kernel. We just disable the backlight, beceause we do not want see the flicker during take over of drm-driver. simplefb = 1 we enable the (maybe) existing simplefb node and reserve framebuffers size in memory. Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at> |
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