drm/i915/gen9: Fix PCODE polling during SAGV disabling

According to the previous patch, it's possible atm that we call
intel_do_sagv_disable() only once during the 1ms period and time out if
that call fails. As opposed to this the spec says that we need to keep
retrying this request for a 1ms duration, so let's do this similarly to
the CDCLK change notification request.

v4-5:
- Rebased on the reply_mask, reply change.
v6:
- Remove w/s change. (Lyude)
- Rebased on the timeout_base argument change.

Cc: Lyude <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Cc: Chris Wilson <[email protected]>
Fixes: 656d1b89e5ff ("drm/i915/skl: Add support for the SAGV, fix underrun hangs")
Signed-off-by: Imre Deak <[email protected]>
Reviewed-by: Lyude <[email protected]> (v4)
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions