drm/i915/display: Implement fb_mmap callback function
authorNirmoy Das <nirmoy.das@intel.com>
Tue, 4 Apr 2023 14:31:00 +0000 (16:31 +0200)
committerNirmoy Das <nirmoy.das@intel.com>
Thu, 6 Apr 2023 16:23:02 +0000 (18:23 +0200)
commite24e6d695377ca70008ffc39695c3975b3e177b6
treee0e79bf7e5d5ca8cdc1470ed2510efc5f860dc7c
parent63b685efaa4d6b9db388857a2e6f5f5f11454f8d
drm/i915/display: Implement fb_mmap callback function

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.

v2: Use to_intel_fbdev() function(Jani)

Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230404143100.10452-5-nirmoy.das@intel.com
drivers/gpu/drm/i915/display/intel_fbdev.c