[Intel-gfx] 4.17-rc2: Could not determine valid watermarks for inherited state

[Ville Syrjälä]

On Thu, Apr 26, 2018 at 10:27:19AM -0400, Dave Jones wrote:
> [    1.176131] [drm:i9xx_get_initial_plane_config] pipe A/primary A with fb: size=800x600 at 32, offset=0, pitch 3200, size 0x1d4c00
> [    1.176161] [drm:i915_gem_object_create_stolen_for_preallocated] creating preallocated stolen object: stolen_offset=0x0000000000000000, gtt_offset=0x0000000000000000, size=0x00000000001d5000
> [    1.176312] [drm:intel_alloc_initial_plane_obj.isra.127] initial plane fb obj         (ptrval)
> [    1.176351] [drm:intel_modeset_init] pipe A active planes 0x1
> [    1.176456] [drm:drm_atomic_helper_check_plane_state] Plane must cover entire CRTC
> [    1.176481] [drm:drm_rect_debug_print] dst: 800x600+0+0
> [    1.176494] [drm:drm_rect_debug_print] clip: 1366x768+0+0

OK, so that's the problem right there. The fb we took over from the
BIOS was 800x600, but now we're trying to set up a 1366x768 mode.

We seem to be missing checks to make sure the initial fb is actually
big enough for the mode we're currently using :(

-- 
Ville Syrjälä
Intel