From: Imre Deak <imre.deak@intel.com>
To: Lyude Paul <lyude@redhat.com>
Cc: intel-gfx@lists.freedesktop.org,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>,
Matt Roper <matthew.d.roper@intel.com>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
"open list:DRM DRIVERS" <dri-devel@lists.freedesktop.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 1/2] drm/i915/gen9bc: Handle TGP PCH during suspend/resume
Date: Wed, 17 Feb 2021 10:02:57 +0200 [thread overview]
Message-ID: <20210217080257.GB443835@ideak-desk.fi.intel.com> (raw)
In-Reply-To: <20210217025337.1929015-1-lyude@redhat.com>
On Tue, Feb 16, 2021 at 09:53:36PM -0500, Lyude Paul wrote:
> From: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
>
> 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.
>
> Cc: Matt Roper <matthew.d.roper@intel.com>
> Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
> drivers/gpu/drm/i915/i915_irq.c | 52 +++++++++++++++++++++------------
> 1 file changed, 33 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 98145a7f28a4..f86b147f588f 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:icl+
For now let's keep this matching the code:
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;
> @@ -3061,8 +3079,9 @@ static void gen8_irq_reset(struct drm_i915_private *dev_priv)
> GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
> GEN3_IRQ_RESET(uncore, GEN8_PCU_);
>
> - if (HAS_PCH_SPLIT(dev_priv))
> - ibx_irq_reset(dev_priv);
> + ibx_irq_reset(dev_priv);
The above shouldn't be changed to account for !PCH platforms as well.
> +
> + cnp_display_clock_wa(dev_priv);
> }
>
> static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
> @@ -3104,15 +3123,7 @@ 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 +3775,19 @@ 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, 0xffffffff);
> +}
> +
> 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 +3796,6 @@ 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, 0xffffffff);
> -}
>
> static void gen11_irq_postinstall(struct drm_i915_private *dev_priv)
> {
> --
> 2.29.2
>
next prev parent reply other threads:[~2021-02-17 8:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-17 2:53 [PATCH v3 1/2] drm/i915/gen9bc: Handle TGP PCH during suspend/resume Lyude Paul
2021-02-17 2:53 ` [PATCH v3 2/2] drm/i915/icp+: Use icp_hpd_irq_setup() instead of spt_hpd_irq_setup() Lyude Paul
2021-02-17 18:18 ` Rodrigo Vivi
2021-02-17 8:02 ` Imre Deak [this message]
2021-02-17 18:00 ` [PATCH v4] drm/i915/gen9bc: Handle TGP PCH during suspend/resume Lyude Paul
2021-02-17 21:18 ` Imre Deak
2021-02-17 21:19 ` Lyude Paul
2021-02-18 4:36 ` Surendrakumar Upadhyay, TejaskumarX
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