[Intel-gfx] [PATCH 11/13] drm/i915/bxt: Enable IPC support

[Chris Wilson]

Quoting Mahesh Kumar (2017-07-13 11:39:02)
> +void intel_enable_ipc(struct drm_i915_private *dev_priv)
> +{
> +       u32 val;
> +
> +       val = I915_READ(DISP_ARB_CTL2);
> +
> +       if (dev_priv->ipc_enabled)
> +               val |= DISP_IPC_ENABLE;
> +       else
> +               val &= ~DISP_IPC_ENABLE;
> +
> +       I915_WRITE(DISP_ARB_CTL2, val);
> +}
> +
> +void intel_init_ipc(struct drm_i915_private *dev_priv)
> +{
> +       dev_priv->ipc_enabled = false;
> +       if (INTEL_GEN(dev_priv) < 9 || IS_SKYLAKE(dev_priv))
> +               return;

So dev_priv->ipc_enabled is just a dev_priv->info.has_ipc, its state
never changes at runtime? Using a intel_device_info field then has a few
useful side-effects including automatic printing in the lists of
capabilities.
-Chris