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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-10-21 16:14:39 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-10-21 22:58:51 +0300 |
| commit | 2bf06370bcfb0dea5655e9a5ad460c7f7dca7739 (patch) | |
| tree | 76a95081c4f0d0f8e84f354614a7274a677359ef /drivers/gpu/drm/i915/i915_pci.c | |
| parent | 6d1a2fdedb2683007405762ca3c9d727b2aee6e2 (diff) | |
| download | linux-2bf06370bcfb0dea5655e9a5ad460c7f7dca7739.tar.xz | |
drm/i915: Restore ILK-M RPS support
Restore RPS for ILK-M. We lost it when an extra HAS_RPS()
check appeared in intel_rps_enable().
Unfortunaltey this just makes the performance worse on my
ILK because intel_ips insists on limiting the GPU freq to
the minimum. If we don't do the RPS init then intel_ips will
not limit the frequency for whatever reason. Either it can't
get at some required information and thus makes wrong decisions,
or we mess up some weights/etc. and cause it to make the wrong
decisions when RPS init has been done, or the entire thing is
just wrong. Would require a bunch of reverse engineering to
figure out what's going on.
Cc: stable@vger.kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Fixes: 9c878557b1eb ("drm/i915/gt: Use the RPM config register to determine clk frequencies")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201021131443.25616-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_pci.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_pci.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 27964ac0638a..1fe390727d80 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -389,6 +389,7 @@ static const struct intel_device_info ilk_m_info = { GEN5_FEATURES, PLATFORM(INTEL_IRONLAKE), .is_mobile = 1, + .has_rps = true, .display.has_fbc = 1, }; |