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From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH] drm/i915: Don't do pre plane update on disabled crtcs
Date: Thu, 14 Jan 2016 18:32:10 +0200	[thread overview]
Message-ID: <1452789130-20878-1-git-send-email-mika.kuoppala@intel.com> (raw)

CI/Bat got following (shortened) trace on byt and also
on bsw:

------------[ cut here ]-----------
Unclaimed register detected before reading register 0x186500
Call Trace:
 __unclaimed_reg_debug+0x68/0x80 [i915]
vlv_read32+0x2de/0x370 [i915]
intel_set_memory_cxsr+0x87/0x1a0 [i915]
intel_pre_plane_update+0xb3/0xf0 [i915]
intel_atomic_commit+0x3b5/0x17c0 [i915]
...
---[ end trace 6387a0ad001bb39f ]---

Fix this by limiting pre plane update only to active crtcs.

References: https://bugs.freedesktop.org/show_bug.cgi?id=93698
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index aa24f79d85bf..a134a698d97d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13580,9 +13580,8 @@ static int intel_atomic_commit(struct drm_device *dev,
 		if (!needs_modeset(crtc->state))
 			continue;
 
-		intel_pre_plane_update(intel_crtc);
-
 		if (crtc_state->active) {
+			intel_pre_plane_update(intel_crtc);
 			intel_crtc_disable_planes(crtc, crtc_state->plane_mask);
 			dev_priv->display.crtc_disable(crtc);
 			intel_crtc->active = false;
-- 
2.5.0

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             reply	other threads:[~2016-01-14 16:30 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-14 16:32 Mika Kuoppala [this message]
2016-01-14 16:52 ` [PATCH] drm/i915: Don't do pre plane update on disabled crtcs Ville Syrjälä
2016-01-18 10:23   ` Maarten Lankhorst
2016-01-19 19:10     ` Mika Kuoppala
2016-01-19 19:22     ` Ville Syrjälä
2016-01-20  7:18       ` Maarten Lankhorst
2016-01-20 11:11         ` Ville Syrjälä
2016-01-25 11:41           ` Maarten Lankhorst
2016-01-14 17:20 ` ✗ warning: Fi.CI.BAT Patchwork
2016-01-15 22:40 ` [PATCH] drm/i915: Don't do pre plane update on disabled crtcs Matt Roper

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