APPLIED (hirsute/5.11): [PATCH 3/3][SRU][Unstable] drm/i915/gen9bc: Handle TGP PCH during suspend/resume

[Andrea Righi]

Looks good to me, applied to hirsute/5.11.

Thanks,
-Andrea

On Wed, Apr 07, 2021 at 10:13:42AM +0800, Koba Ko wrote:
> From: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay at intel.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1922768 
> 
> 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 <matthew.d.roper at intel.com>
> Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay at intel.com>
> Signed-off-by: Lyude Paul <lyude at redhat.com>
> Reviewed-by: Imre Deak <imre.deak at intel.com>
> Link: https://patchwork.freedesktop.org/patch/msgid/20210217180016.1937401-1-lyude@redhat.com
> (cherry picked from commit 59b7cb44cffde6ab5b8ace1aef9b79f50be1c3eb git://anongit.freedesktop.org/drm-tip)
> Signed-off-by: Koba Ko <koba.ko at canonical.com>
> ---
>  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 1a701367a718..d0f317de9067 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -3023,6 +3023,24 @@ 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;
> @@ -3046,6 +3064,8 @@ 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)
> @@ -3087,15 +3107,7 @@ 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)
> @@ -3747,9 +3759,19 @@ 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);
> @@ -3758,13 +3780,6 @@ 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)
>  {
> -- 
> 2.17.1
> 
> 
> -- 
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team