[Intel-gfx] [PATCH] drm/i915/dsc: Remove redundant checks in DSC disable

[Jani Nikula]

On Thu, 03 Jun 2021, "Kulkarni, Vandita" <vandita.kulkarni at intel.com> wrote:
>> -----Original Message-----
>> From: Saarinen, Jani <jani.saarinen at intel.com>
>> Sent: Thursday, June 3, 2021 1:07 PM
>> To: Kulkarni, Vandita <vandita.kulkarni at intel.com>; intel-
>> gfx at lists.freedesktop.org
>> Cc: Nikula, Jani <jani.nikula at intel.com>
>> Subject: RE: [Intel-gfx] [PATCH] drm/i915/dsc: Remove redundant checks in
>> DSC disable
>> 
>> Hi,
>> > -----Original Message-----
>> > From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of
>> > Vandita Kulkarni
>> > Sent: torstai 3. kesäkuuta 2021 9.54
>> > To: intel-gfx at lists.freedesktop.org
>> > Cc: Nikula, Jani <jani.nikula at intel.com>
>> > Subject: [Intel-gfx] [PATCH] drm/i915/dsc: Remove redundant checks in
>> > DSC disable
>> >
>> > There can be a chance that pre os has enabled DSC and driver's compute
>> > config would not need dsc to be enabled, in such case if we check on
>> > compute config's compression state to disable, we might end up in state
>> mismatch.
>> 
>> I assume this fixes real gitlab issue too?
> Okay, will add the tag 
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3537

See https://lore.kernel.org/r/87fsxzp9qx.fsf@intel.com

The problem is with ->bigjoiner, not the entire statement.


BR,
Jani.

>
> Thanks,
> Vandita
>> 
>> >
>> > Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>
>> > ---
>> >  drivers/gpu/drm/i915/display/intel_vdsc.c | 4 ----
>> >  1 file changed, 4 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
>> > b/drivers/gpu/drm/i915/display/intel_vdsc.c
>> > index 19cd9531c115..b05a96011d93 100644
>> > --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
>> > +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
>> > @@ -1161,10 +1161,6 @@ void intel_dsc_disable(const struct
>> > intel_crtc_state
>> > *old_crtc_state)
>> >  	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
>> >  	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>> >
>> > -	if (!(old_crtc_state->dsc.compression_enable &&
>> > -	      old_crtc_state->bigjoiner))
>> > -		return;
>> > -
>> >  	intel_de_write(dev_priv, dss_ctl1_reg(old_crtc_state), 0);
>> >  	intel_de_write(dev_priv, dss_ctl2_reg(old_crtc_state), 0);  }
>> > --
>> > 2.21.0.5.gaeb582a
>> >
>> > _______________________________________________
>> > Intel-gfx mailing list
>> > Intel-gfx at lists.freedesktop.org
>> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Jani Nikula, Intel Open Source Graphics Center