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* [Intel-gfx] [PATCH] drm/i915: Don't enable WaIncreaseLatencyIPCEnabled when IPC is disabled
@ 2020-04-30 21:46 ` Sultan Alsawaf
  0 siblings, 0 replies; 8+ messages in thread
From: Sultan Alsawaf @ 2020-04-30 21:46 UTC (permalink / raw)
  Cc: dri-devel, David Airlie, intel-gfx, linux-kernel, stable,
	Sultan Alsawaf

From: Sultan Alsawaf <sultan@kerneltoast.com>

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@vger.kernel.org # 5.3.x+
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
---
 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)) &&
 	    dev_priv->ipc_enabled)
 		latency += 4;
 
-- 
2.26.2

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^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2020-05-04 16:12 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-04-30 21:46 [Intel-gfx] [PATCH] drm/i915: Don't enable WaIncreaseLatencyIPCEnabled when IPC is disabled Sultan Alsawaf
2020-04-30 21:46 ` Sultan Alsawaf
2020-05-04  7:28 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for " Patchwork
2020-05-04  7:51 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-05-04 15:27 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
2020-05-04 16:12 ` [PATCH] " Ville Syrjälä
2020-05-04 16:12   ` Ville Syrjälä
2020-05-04 16:12   ` [Intel-gfx] " Ville Syrjälä

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