Quoting Rodrigo Vivi (2017-09-28 19:51:48)
> Although Bspec state this Workaround is only relevant for SKL:All.
>
> The wa_database state this is needed for All platforms from SKL to CNL.
>
> So let's pick the safest case.
>
> Cc: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_pm.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index ede871b7982e..27f9d5ab2d23 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -5828,8 +5828,8 @@ void intel_enable_ipc(struct drm_i915_private *dev_priv)
> {
> u32 val;
>
> - /* Display WA #0477 WaDisableIPC: skl */
> - if (IS_SKYLAKE(dev_priv)) {
> + /* Display WA #0477 WaDisableIPC: skl,kbl,bxt,glk,cfl,cnl */
> + if (INTEL_GEN(dev_priv) <= 10) {
But at that point, why not just define has_ipc as a gen10 feature? You
can have a comment before gen9 feature that although IPC was introduced
for gen9, it is recommended (w/a) to leave disabled.
-Chris
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