linux-kernel - Re: [PATCH v3 2/2] drm/i915/icp+: Use icp_hpd_irq_setup() instead of spt_hpd_irq_setup()

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Date:   Wed, 17 Feb 2021 13:18:58 -0500
From:   Rodrigo Vivi <rodrigo.vivi@...el.com>
To:     Lyude Paul <lyude@...hat.com>
Cc:     intel-gfx@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
        Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@...el.com>
Subject: Re: [PATCH v3 2/2] drm/i915/icp+: Use icp_hpd_irq_setup() instead of
 spt_hpd_irq_setup()

On Tue, Feb 16, 2021 at 09:53:37PM -0500, Lyude Paul wrote:
> While reviewing patches for handling workarounds related to gen9 bc, Imre
> from Intel discovered that we're using spt_hpd_irq_setup() on ICP+ PCHs
> despite it being almost the same as icp_hpd_irq_setup(). Since we need to
> be calling icp_hpd_irq_setup() to ensure that CML-S/TGP platforms function
> correctly anyway, let's move platforms using PCH_ICP which aren't handled
> by gen11_hpd_irq_setup() over to icp_hpd_irq_setup().
> 
> Cc: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@...el.com>
> Signed-off-by: Lyude Paul <lyude@...hat.com>

makes sense to me...

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>

> ---
>  drivers/gpu/drm/i915/i915_irq.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index f86b147f588f..7ec61187a315 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -4320,6 +4320,8 @@ void intel_irq_init(struct drm_i915_private *dev_priv)
>  			dev_priv->display.hpd_irq_setup = gen11_hpd_irq_setup;
>  		else if (IS_GEN9_LP(dev_priv))
>  			dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
> +		else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
> +			dev_priv->display.hpd_irq_setup = icp_hpd_irq_setup;
>  		else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT)
>  			dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
>  		else
> -- 
> 2.29.2
> 
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