intel_fb_xy_to_linear
linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
unsigned int intel_fb_xy_to_linear(int x, int y,
linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);