drm/i915/pcode: Give the punit time to settle before fatally failing

drm/i915/pcode: Give the punit time to settle before fatally failing

During module load the punit might still be busy with its booting
routines. During this time we try to communicate with it but we
fail because we don't receive any feedback from it and we return
immediately with a -EINVAL fatal error.

At this point the driver load is "dramatically" aborted. The
following error message notifies us about it.

   i915 0000:4d:00.0: drm_WARN_ON_ONCE(timeout_base_ms > 3)

It would be enough to wait a little in order to give the punit
the chance to come up bright and shiny, ready to interact with
the driver.

Wait up 10 seconds for the punit to settle and complete any
outstanding transactions upon module load. If it still fails try
again with a longer timeout, 180s, 3 minutes. If it still fails
then return -EPROBE_DEFER, in order to give the punit a second
chance.

Even if these timers might look long, we should consider that the
punit, depending on the platforms, might need long times to
complete its routines. Besides we want to try anything possible
to move forward before deciding to abort the driver's load.

The issue has been reported in:

   https://gitlab.freedesktop.org/drm/intel/-/issues/7814

The changes in this patch are valid only and uniquely during
boot. The common transactions with the punit during the driver's
normal operation are not affected.

Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Co-developed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230206183236.109908-1-andi.shyti@linux.intel.com