RE: [PATCH v4] drm/i915/gen9bc: Handle TGP PCH during suspend/resume
> -Original Message-
> From: Lyude Paul
> Sent: 18 February 2021 02:49
> To: Deak, Imre
> Cc: intel-...@lists.freedesktop.org; Surendrakumar Upadhyay, TejaskumarX
> ; Roper, Matthew D
> ; Jani Nikula ;
> Joonas Lahtinen ; Vivi, Rodrigo
> ; David Airlie ; Daniel Vetter
> ; open list:DRM DRIVERS de...@lists.freedesktop.org>; open list
> Subject: Re: [PATCH v4] drm/i915/gen9bc: Handle TGP PCH during
> suspend/resume
>
> On Wed, 2021-02-17 at 23:18 +0200, Imre Deak wrote:
> > On Wed, Feb 17, 2021 at 01:00:16PM -0500, Lyude Paul wrote:
> > > From: Tejas Upadhyay
>
> > >
> > > For Legacy S3 suspend/resume GEN9 BC needs to enable and setup TGP
> > > PCH.
> > >
> > > v2:
> > > * Move Wa_14010685332 into it's own function - vsyrjala
> > > * Add TODO comment about figuring out if we can move this workaround
> > > - imre
> > > v3:
> > > * Rename cnp_irq_post_reset() to cnp_display_clock_wa()
> > > * Add TODO item mentioning we need to clarify which platforms this
> > > workaround applies to
> > > * Just use ibx_irq_reset() in gen8_irq_reset(). This code should be
> > > functionally equivalent on gen9 bc to the code v2 added
> > > * Drop icp_hpd_irq_setup() call in spt_hpd_irq_setup(), this looks
> > > to be
> > > more or less identical to spt_hpd_irq_setup() minus additionally
> > > enabling
> > > one port. Will update i915 to use icp_hpd_irq_setup() for ICP in a
> > > separate patch.
> > > v4:
> > > * Revert Wa_14010685332 system list in comments to how it was before
> > > * Add back HAS_PCH_SPLIT() check before calling ibx_irq_reset()
> > >
> > > Cc: Matt Roper
> > > Signed-off-by: Tejas Upadhyay
> > >
> > > Signed-off-by: Lyude Paul
> >
> > Thanks, looks ok to me:
> > Reviewed-by: Imre Deak
> >
> > nit: cnp_display_clock_gating_wa() would be an even better name, could
> > be renamed while applying.
>
> Sure thing. JFYI - I'm going to hold off on pushing this patch until I've got
> confirmation from the OEMs this is for that these patches still fix their
> issues
> (since I unfortunately don't have any access to this hardware).
I can follow up with OEM to test or I can get it tested in my LAB, as I have
RKL RVP (CML CPU) + TGP PCH with me.
>
> >
> > > ---
> > > drivers/gpu/drm/i915/i915_irq.c | 49
> > > +
> > > 1 file changed, 32 insertions(+), 17 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/i915_irq.c
> > > b/drivers/gpu/drm/i915/i915_irq.c index 98145a7f28a4..9b56a8f81e1a
> > > 100644
> > > --- a/drivers/gpu/drm/i915/i915_irq.c
> > > +++ b/drivers/gpu/drm/i915/i915_irq.c
> > > @@ -3040,6 +3040,24 @@ static void valleyview_irq_reset(struct
> > > drm_i915_private *dev_priv)
> > > spin_unlock_irq(&dev_priv->irq_lock);
> > > }
> > >
> > > +static void cnp_display_clock_wa(struct drm_i915_private *dev_priv)
> > > +{
> > > + struct intel_uncore *uncore = &dev_priv->uncore;
> > > +
> > > + /*
> > > + * Wa_14010685332:cnp/cmp,tgp,adp
> > > + * TODO: Clarify which platforms this applies to
> > > + * TODO: Figure out if this workaround can be applied in the
> > > +s0ix
> > > suspend/resume handlers as
> > > + * on earlier platforms and whether the workaround is also
> > > +needed
> > > for runtime suspend/resume
> > > + */
> > > + if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP ||
> > > + (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP &&
> > > +INTEL_PCH_TYPE(dev_priv)
> > > < PCH_DG1)) {
> > > + intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> > > SBCLK_RUN_REFCLK_DIS,
> > > + SBCLK_RUN_REFCLK_DIS);
> > > + intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> > > SBCLK_RUN_REFCLK_DIS, 0);
> > > + }
> > > +}
> > > +
> > > static void gen8_irq_reset(struct drm_i915_private *dev_priv)
> > > {
> > > struct intel_uncore *uncore = &dev_priv->uncore; @@ -3063,6
> > > +3081,8 @@ static void gen8_irq_reset(struct drm_i915_private
> > > *dev_priv)
> > >
> > > if (HAS_PCH_SPLIT(dev_priv))
> > > ibx_irq_reset(dev_pri
Re: [PATCH v4] drm/i915/gen9bc: Handle TGP PCH during suspend/resume
On Wed, 2021-02-17 at 23:18 +0200, Imre Deak wrote:
> On Wed, Feb 17, 2021 at 01:00:16PM -0500, Lyude Paul wrote:
> > From: Tejas Upadhyay
> >
> > For Legacy S3 suspend/resume GEN9 BC needs to enable and
> > setup TGP PCH.
> >
> > v2:
> > * Move Wa_14010685332 into it's own function - vsyrjala
> > * Add TODO comment about figuring out if we can move this workaround - imre
> > v3:
> > * Rename cnp_irq_post_reset() to cnp_display_clock_wa()
> > * Add TODO item mentioning we need to clarify which platforms this
> > workaround applies to
> > * Just use ibx_irq_reset() in gen8_irq_reset(). This code should be
> > functionally equivalent on gen9 bc to the code v2 added
> > * Drop icp_hpd_irq_setup() call in spt_hpd_irq_setup(), this looks to be
> > more or less identical to spt_hpd_irq_setup() minus additionally enabling
> > one port. Will update i915 to use icp_hpd_irq_setup() for ICP in a
> > separate patch.
> > v4:
> > * Revert Wa_14010685332 system list in comments to how it was before
> > * Add back HAS_PCH_SPLIT() check before calling ibx_irq_reset()
> >
> > Cc: Matt Roper
> > Signed-off-by: Tejas Upadhyay
> > Signed-off-by: Lyude Paul
>
> Thanks, looks ok to me:
> Reviewed-by: Imre Deak
>
> nit: cnp_display_clock_gating_wa() would be an even better name, could
> be renamed while applying.
Sure thing. JFYI - I'm going to hold off on pushing this patch until I've got
confirmation from the OEMs this is for that these patches still fix their issues
(since I unfortunately don't have any access to this hardware).
>
> > ---
> > drivers/gpu/drm/i915/i915_irq.c | 49 +
> > 1 file changed, 32 insertions(+), 17 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_irq.c
> > b/drivers/gpu/drm/i915/i915_irq.c
> > index 98145a7f28a4..9b56a8f81e1a 100644
> > --- a/drivers/gpu/drm/i915/i915_irq.c
> > +++ b/drivers/gpu/drm/i915/i915_irq.c
> > @@ -3040,6 +3040,24 @@ static void valleyview_irq_reset(struct
> > drm_i915_private *dev_priv)
> > spin_unlock_irq(&dev_priv->irq_lock);
> > }
> >
> > +static void cnp_display_clock_wa(struct drm_i915_private *dev_priv)
> > +{
> > + struct intel_uncore *uncore = &dev_priv->uncore;
> > +
> > + /*
> > + * Wa_14010685332:cnp/cmp,tgp,adp
> > + * TODO: Clarify which platforms this applies to
> > + * TODO: Figure out if this workaround can be applied in the s0ix
> > suspend/resume handlers as
> > + * on earlier platforms and whether the workaround is also needed
> > for runtime suspend/resume
> > + */
> > + if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP ||
> > + (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && INTEL_PCH_TYPE(dev_priv)
> > < PCH_DG1)) {
> > + intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> > SBCLK_RUN_REFCLK_DIS,
> > + SBCLK_RUN_REFCLK_DIS);
> > + intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> > SBCLK_RUN_REFCLK_DIS, 0);
> > + }
> > +}
> > +
> > static void gen8_irq_reset(struct drm_i915_private *dev_priv)
> > {
> > struct intel_uncore *uncore = &dev_priv->uncore;
> > @@ -3063,6 +3081,8 @@ static void gen8_irq_reset(struct drm_i915_private
> > *dev_priv)
> >
> > if (HAS_PCH_SPLIT(dev_priv))
> > ibx_irq_reset(dev_priv);
> > +
> > + cnp_display_clock_wa(dev_priv);
> > }
> >
> > static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
> > @@ -3104,15 +3124,7 @@ static void gen11_display_irq_reset(struct
> > drm_i915_private *dev_priv)
> > if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
> > GEN3_IRQ_RESET(uncore, SDE);
> >
> > - /* Wa_14010685332:cnp/cmp,tgp,adp */
> > - if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP ||
> > - (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP &&
> > - INTEL_PCH_TYPE(dev_priv) < PCH_DG1)) {
> > - intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> > - SBCLK_RUN_REFCLK_DIS,
> > SBCLK_RUN_REFCLK_DIS);
> > - intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> > - SBCLK_RUN_REFCLK_DIS, 0);
> > - }
> > + cnp_display_clock_wa(dev_priv);
> > }
> >
> > static void gen11_irq_reset(struct drm_i915_private *dev_priv)
> > @@ -3764,9 +3776,19 @@ static void gen8_de_irq_postinstall(struct
> > drm_i915_private *dev_priv)
> > }
> > }
> >
> > +static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
> > +{
> > + struct intel_uncore *uncore = &dev_priv->uncore;
> > + u32 mask = SDE_GMBUS_ICP;
> > +
> > + GEN3_IRQ_INIT(uncore, SDE, ~mask, 0x);
> > +}
> > +
> > static void gen8_irq_postinstall(struct drm_i915_private *dev_priv)
> > {
> > - if (HAS_PCH_SPLIT(dev_priv))
> > + if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
> > + icp_irq_postinstall(dev_priv);
> > + else if (HAS_PCH_SPLIT(dev_priv))
> > ibx_irq_postinstall(dev_pri
Re: [PATCH v4] drm/i915/gen9bc: Handle TGP PCH during suspend/resume
On Wed, Feb 17, 2021 at 01:00:16PM -0500, Lyude Paul wrote:
> From: Tejas Upadhyay
>
> For Legacy S3 suspend/resume GEN9 BC needs to enable and
> setup TGP PCH.
>
> v2:
> * Move Wa_14010685332 into it's own function - vsyrjala
> * Add TODO comment about figuring out if we can move this workaround - imre
> v3:
> * Rename cnp_irq_post_reset() to cnp_display_clock_wa()
> * Add TODO item mentioning we need to clarify which platforms this
> workaround applies to
> * Just use ibx_irq_reset() in gen8_irq_reset(). This code should be
> functionally equivalent on gen9 bc to the code v2 added
> * Drop icp_hpd_irq_setup() call in spt_hpd_irq_setup(), this looks to be
> more or less identical to spt_hpd_irq_setup() minus additionally enabling
> one port. Will update i915 to use icp_hpd_irq_setup() for ICP in a
> separate patch.
> v4:
> * Revert Wa_14010685332 system list in comments to how it was before
> * Add back HAS_PCH_SPLIT() check before calling ibx_irq_reset()
>
> Cc: Matt Roper
> Signed-off-by: Tejas Upadhyay
> Signed-off-by: Lyude Paul
Thanks, looks ok to me:
Reviewed-by: Imre Deak
nit: cnp_display_clock_gating_wa() would be an even better name, could
be renamed while applying.
> ---
> drivers/gpu/drm/i915/i915_irq.c | 49 +
> 1 file changed, 32 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 98145a7f28a4..9b56a8f81e1a 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -3040,6 +3040,24 @@ static void valleyview_irq_reset(struct
> drm_i915_private *dev_priv)
> spin_unlock_irq(&dev_priv->irq_lock);
> }
>
> +static void cnp_display_clock_wa(struct drm_i915_private *dev_priv)
> +{
> + struct intel_uncore *uncore = &dev_priv->uncore;
> +
> + /*
> + * Wa_14010685332:cnp/cmp,tgp,adp
> + * TODO: Clarify which platforms this applies to
> + * TODO: Figure out if this workaround can be applied in the s0ix
> suspend/resume handlers as
> + * on earlier platforms and whether the workaround is also needed for
> runtime suspend/resume
> + */
> + if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP ||
> + (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && INTEL_PCH_TYPE(dev_priv) <
> PCH_DG1)) {
> + intel_uncore_rmw(uncore, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS,
> + SBCLK_RUN_REFCLK_DIS);
> + intel_uncore_rmw(uncore, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS,
> 0);
> + }
> +}
> +
> static void gen8_irq_reset(struct drm_i915_private *dev_priv)
> {
> struct intel_uncore *uncore = &dev_priv->uncore;
> @@ -3063,6 +3081,8 @@ static void gen8_irq_reset(struct drm_i915_private
> *dev_priv)
>
> if (HAS_PCH_SPLIT(dev_priv))
> ibx_irq_reset(dev_priv);
> +
> + cnp_display_clock_wa(dev_priv);
> }
>
> static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
> @@ -3104,15 +3124,7 @@ static void gen11_display_irq_reset(struct
> drm_i915_private *dev_priv)
> if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
> GEN3_IRQ_RESET(uncore, SDE);
>
> - /* Wa_14010685332:cnp/cmp,tgp,adp */
> - if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP ||
> - (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP &&
> - INTEL_PCH_TYPE(dev_priv) < PCH_DG1)) {
> - intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> - SBCLK_RUN_REFCLK_DIS, SBCLK_RUN_REFCLK_DIS);
> - intel_uncore_rmw(uncore, SOUTH_CHICKEN1,
> - SBCLK_RUN_REFCLK_DIS, 0);
> - }
> + cnp_display_clock_wa(dev_priv);
> }
>
> static void gen11_irq_reset(struct drm_i915_private *dev_priv)
> @@ -3764,9 +3776,19 @@ static void gen8_de_irq_postinstall(struct
> drm_i915_private *dev_priv)
> }
> }
>
> +static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
> +{
> + struct intel_uncore *uncore = &dev_priv->uncore;
> + u32 mask = SDE_GMBUS_ICP;
> +
> + GEN3_IRQ_INIT(uncore, SDE, ~mask, 0x);
> +}
> +
> static void gen8_irq_postinstall(struct drm_i915_private *dev_priv)
> {
> - if (HAS_PCH_SPLIT(dev_priv))
> + if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
> + icp_irq_postinstall(dev_priv);
> + else if (HAS_PCH_SPLIT(dev_priv))
> ibx_irq_postinstall(dev_priv);
>
> gen8_gt_irq_postinstall(&dev_priv->gt);
> @@ -3775,13 +3797,6 @@ static void gen8_irq_postinstall(struct
> drm_i915_private *dev_priv)
> gen8_master_intr_enable(dev_priv->uncore.regs);
> }
>
> -static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
> -{
> - struct intel_uncore *uncore = &dev_priv->uncore;
> - u32 mask = SDE_GMBUS_ICP;
> -
> - GEN3_IRQ_INIT(uncore, SDE, ~mask, 0x);
> -}
>
> static void gen11_irq_postinstall(struct drm_i915_private *dev_priv)
> {
> --
> 2.29.2
>
