why's svgadrmfb not exposing linear phys framebuffer address?

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https://www.kernel.org/doc/Documentation/fb/api.txt

according to this, fb_fix_screeninfo struct should have the
physical start address and stride of the framebuffer. but
it lies: giving me *ZERO* for smem_start. driver id is
"svgadrmfb".

is there any other linux interface to get to the phyical
framebuffer address that actually works?

--
cinap

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