On Thu, Apr 30, 2020 at 02:46:54PM -0700, Sultan Alsawaf wrote:
> From: Sultan Alsawaf <sultan@xxxxxxxxxxxxxxx>
>
> In commit 5a7d202b1574, a logical AND was erroneously changed to an OR,
> causing WaIncreaseLatencyIPCEnabled to be enabled unconditionally for
> kabylake and coffeelake, even when IPC is disabled. Fix the logic so
> that WaIncreaseLatencyIPCEnabled is only used when IPC is enabled.
>
> Fixes: 5a7d202b1574 ("drm/i915: Drop WaIncreaseLatencyIPCEnabled/1140 for cnl")
> Cc: stable@xxxxxxxxxxxxxxx # 5.3.x+
> Signed-off-by: Sultan Alsawaf <sultan@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_pm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 8375054ba27d..a52986a9e7a6 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4992,7 +4992,7 @@ static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
> * WaIncreaseLatencyIPCEnabled: kbl,cfl
> * Display WA #1141: kbl,cfl
> */
> - if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) ||
> + if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) &&
Whoops. Thanks for the fix. Pushed.
> dev_priv->ipc_enabled)
> latency += 4;
>
> --
> 2.26.2
--
Ville Syrjälä
Intel
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