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drm/i915: Don't enable WaIncreaseLatencyIPCEnabled when IPC is disabled 

In commit 5a7d202b15, 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: 5a7d202b15 ("drm/i915: Drop WaIncreaseLatencyIPCEnabled/1140 for cnl")
Cc: stable@vger.kernel.org # 5.3.x+
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200430214654.51314-1-sultan@kerneltoast.com
This commit is contained in:
Sultan Alsawaf 2020-04-30 14:46:54 -07:00 committed by Ville Syrjälä
parent 2dd43144e8
commit 690d22dafa
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_pm.c
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@ -5080,7 +5080,7 @@ 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)) &&
dev_priv->ipc_enabled)
latency += 4;