[Intel-gfx] [PATCH] drm/i915: Fix the graphics frequency clamping at init and when IPS is active.
chris at chris-wilson.co.uk
Tue Nov 2 02:37:35 PDT 2010
On Mon, 1 Nov 2010 14:12:01 -0700, Eric Anholt <eric at anholt.net> wrote:
> From: Jesse Barnes <jbarnes at virtuousgeek.org>
> Part of the issue here was that Eric slipped in a debug hack for
> testing the i915 IPS code before the intel_ips.c driver had landed.
> This caused the driver to always use the full range of frequencies,
> which is only legal when IPS tells us we have the headroom. Once that
> hack was removed, there was confusion about the driver's frequency
> clamping variables: max_delay is the driver's current limit on the
> highest frequency the IPS driver wants us to use, while dev_priv->fmax
> is the hardware-reported limit that the IPS driver can increase up to.
Dropped the promotion to DRM_ERROR and applied to -fixes. Since your
changelog says that what we have right now is programming invalid values
into the IPS, I've marked it for stable.
Chris Wilson, Intel Open Source Technology Centre
More information about the Intel-gfx