On Fri, 27 Nov 2020, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> We now use ilk_hpd_irq_setup for all GMCH platforms that do not have
> hotplug. These are early gen3 and gen2 devices that now explode on boot
> as they try to access non-existent registers.
>
> Fixes: 794d61a19090 ("drm/i915: re-order if/else ladder for hpd_irq_setup")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_irq.c | 27 +++++++++++++++------------
> 1 file changed, 15 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index dc6febc63f1c..c80eeac53952 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -4242,18 +4242,21 @@ void intel_irq_init(struct drm_i915_private *dev_priv)
> */
> dev_priv->hotplug.hpd_short_storm_enabled = !HAS_DP_MST(dev_priv);
>
> - if (HAS_PCH_DG1(dev_priv))
> - dev_priv->display.hpd_irq_setup = dg1_hpd_irq_setup;
> - else if (INTEL_GEN(dev_priv) >= 11)
> - 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_SPT)
> - dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
> - else if (HAS_GMCH(dev_priv) && I915_HAS_HOTPLUG(dev_priv))
> - dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
> - else
> - dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
> + if (HAS_GMCH(dev_priv)) {
> + if (I915_HAS_HOTPLUG(dev_priv))
> + dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
> + } else {
> + if (HAS_PCH_DG1(dev_priv))
> + dev_priv->display.hpd_irq_setup = dg1_hpd_irq_setup;
> + else if (INTEL_GEN(dev_priv) >= 11)
> + 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_SPT)
> + dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
> + else
> + dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
> + }
> }
>
> /**
--
Jani Nikula, Intel Open Source Graphics Center
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