Hi Nirmoy, On Thu, Mar 16, 2023 at 06:22:20PM +0100, Nirmoy Das wrote: > If stolen memory allocation fails for fbdev, the driver will > fallback to system memory. Calculation of smem_start is wrong > for such framebuffer objs if the platform comes with no gmadr or > no aperture. Solve this by adding fb_mmap callback which will > use GTT if aperture is available otherwise will use cpu to access > the framebuffer. > > Cc: Matthew Auld <matthew.auld@xxxxxxxxx> > Cc: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx> > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > Cc: Jani Nikula <jani.nikula@xxxxxxxxx> > Cc: Imre Deak <imre.deak@xxxxxxxxx> > Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxxxx> with Jani's suggestion: Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx> Andi