* [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured
@ 2018-03-19 10:15 Rushikesh S Kadam
2018-03-19 10:33 ` Chris Wilson
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Rushikesh S Kadam @ 2018-03-19 10:15 UTC (permalink / raw)
To: rodrigo.vivi, joonas.lahtinen, jani.nikula
Cc: jianxun.zhang, rushikesh.s.kadam, intel-gfx
The patch implements workaround for a scenario, where the GPU Power
Management, if not configured prior to platform suspend entry, will block
SoC S0ix entry in suspend-to-idle.
Typically the GPU Power Management configuration is restored after a
platform suspend cycle, in the drm ioclts callbacks (such as ioclt
I915_GEM_EXECBUFFER2_WR).
There exists a corner case - if the next platform suspend cycle is
initiated quickly, before the ioctl callbacks are triggered, the GPU
Power Management is not setup at the time of suspend entry.
In such as scenario, the GPU does not enter low power state (RC6), which in
turn prevents the SoC from entering low power package state (PC2 or
deeper). This blocks SoC S0ix entry in suspend-to-idle.
The patch detects such a condition and works around by configuring GPU
Power Management in i915 driver's ->suspend().
Signed-off-by: Rushikesh S Kadam <rushikesh.s.kadam@intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index f03555e..9f3cc4c 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2076,6 +2076,7 @@ static int i915_pm_suspend(struct device *kdev)
{
struct pci_dev *pdev = to_pci_dev(kdev);
struct drm_device *dev = pci_get_drvdata(pdev);
+ struct drm_i915_private *dev_priv = to_i915(dev);
if (!dev) {
dev_err(kdev, "DRM not initialized, aborting suspend.\n");
@@ -2085,6 +2086,31 @@ static int i915_pm_suspend(struct device *kdev)
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
+ /*
+ * Implement workaround for a scenario, where the GPU Power
+ * Management, if not configured prior to platform suspend
+ * entry, will block SoC S0ix entry in suspend-to-idle.
+ *
+ * Typically the GPU Power Management configuration is
+ * restored in drm runtime / ioclts callbacks (such as
+ * I915_GEM_EXECBUFFER2_WR) after the platform has resumed
+ * from a suspend cycle.
+ *
+ * There exists a corner case - if the next platform suspend
+ * cycle is initiated quickly, before the runtime callbacks
+ * are triggered, the GPU Power Management is not configured
+ * at time of suspend entry. This blocks SoC S0ix entry in
+ * suspend-to-idle
+ *
+ * Detect such a condition, and workaround by configuring the
+ * GPU Power Management here.
+ */
+ if (INTEL_GEN(dev_priv) >= 9 &&
+ (!(I915_READ(GEN6_RC_CONTROL) & GEN6_RC_CTL_HW_ENABLE))) {
+ DRM_INFO("Detected GPU PM is not configured! Configure now.\n");
+ intel_enable_gt_powersave(dev_priv);
+ }
+
return i915_drm_suspend(dev);
}
--
1.9.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured
2018-03-19 10:15 [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured Rushikesh S Kadam
@ 2018-03-19 10:33 ` Chris Wilson
2018-03-19 10:41 ` ✓ Fi.CI.BAT: success for " Patchwork
2018-03-19 11:47 ` ✗ Fi.CI.IGT: warning " Patchwork
2 siblings, 0 replies; 4+ messages in thread
From: Chris Wilson @ 2018-03-19 10:33 UTC (permalink / raw)
To: rodrigo.vivi, joonas.lahtinen, jani.nikula
Cc: jianxun.zhang, intel-gfx, rushikesh.s.kadam
Quoting Rushikesh S Kadam (2018-03-19 10:15:44)
> The patch implements workaround for a scenario, where the GPU Power
> Management, if not configured prior to platform suspend entry, will block
> SoC S0ix entry in suspend-to-idle.
>
> Typically the GPU Power Management configuration is restored after a
> platform suspend cycle, in the drm ioclts callbacks (such as ioclt
> I915_GEM_EXECBUFFER2_WR).
As I indicated on the bug report, this is not how the kernel works
currently. On load/resume, enabling powermanagement is forced.
Please do test upstream.
-Chris
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^ permalink raw reply [flat|nested] 4+ messages in thread
* ✓ Fi.CI.BAT: success for drm/i915: Configure GPU PM in ->suspend() if not configured
2018-03-19 10:15 [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured Rushikesh S Kadam
2018-03-19 10:33 ` Chris Wilson
@ 2018-03-19 10:41 ` Patchwork
2018-03-19 11:47 ` ✗ Fi.CI.IGT: warning " Patchwork
2 siblings, 0 replies; 4+ messages in thread
From: Patchwork @ 2018-03-19 10:41 UTC (permalink / raw)
To: Rushikesh S Kadam; +Cc: intel-gfx
== Series Details ==
Series: drm/i915: Configure GPU PM in ->suspend() if not configured
URL : https://patchwork.freedesktop.org/series/40173/
State : success
== Summary ==
Series 40173v1 drm/i915: Configure GPU PM in ->suspend() if not configured
https://patchwork.freedesktop.org/api/1.0/series/40173/revisions/1/mbox/
---- Known issues:
Test kms_flip:
Subgroup basic-flip-vs-wf_vblank:
fail -> PASS (fi-cfl-s2) fdo#100368
Test kms_pipe_crc_basic:
Subgroup read-crc-pipe-a-frame-sequence:
fail -> PASS (fi-cfl-s2) fdo#103481
Subgroup suspend-read-crc-pipe-a:
pass -> FAIL (fi-ivb-3520m) k.org#198519 +2
Subgroup suspend-read-crc-pipe-b:
pass -> INCOMPLETE (fi-snb-2520m) fdo#103713
fdo#100368 https://bugs.freedesktop.org/show_bug.cgi?id=100368
fdo#103481 https://bugs.freedesktop.org/show_bug.cgi?id=103481
k.org#198519 https://bugzilla.kernel.org/show_bug.cgi?id=198519
fdo#103713 https://bugs.freedesktop.org/show_bug.cgi?id=103713
fi-bdw-5557u total:285 pass:264 dwarn:0 dfail:0 fail:0 skip:21 time:436s
fi-bdw-gvtdvm total:285 pass:261 dwarn:0 dfail:0 fail:0 skip:24 time:448s
fi-blb-e6850 total:285 pass:220 dwarn:1 dfail:0 fail:0 skip:64 time:381s
fi-bsw-n3050 total:285 pass:239 dwarn:0 dfail:0 fail:0 skip:46 time:543s
fi-bwr-2160 total:285 pass:180 dwarn:0 dfail:0 fail:0 skip:105 time:295s
fi-bxt-dsi total:285 pass:255 dwarn:0 dfail:0 fail:0 skip:30 time:513s
fi-bxt-j4205 total:285 pass:256 dwarn:0 dfail:0 fail:0 skip:29 time:510s
fi-byt-j1900 total:285 pass:250 dwarn:0 dfail:0 fail:0 skip:35 time:517s
fi-byt-n2820 total:285 pass:246 dwarn:0 dfail:0 fail:0 skip:39 time:503s
fi-cfl-8700k total:285 pass:257 dwarn:0 dfail:0 fail:0 skip:28 time:410s
fi-cfl-s2 total:285 pass:259 dwarn:0 dfail:0 fail:0 skip:26 time:580s
fi-cfl-u total:285 pass:259 dwarn:0 dfail:0 fail:0 skip:26 time:510s
fi-cnl-drrs total:285 pass:254 dwarn:3 dfail:0 fail:0 skip:28 time:529s
fi-elk-e7500 total:285 pass:225 dwarn:1 dfail:0 fail:0 skip:59 time:418s
fi-gdg-551 total:285 pass:176 dwarn:0 dfail:0 fail:1 skip:108 time:316s
fi-hsw-4770 total:285 pass:258 dwarn:0 dfail:0 fail:0 skip:27 time:403s
fi-ilk-650 total:285 pass:225 dwarn:0 dfail:0 fail:0 skip:60 time:422s
fi-ivb-3520m total:285 pass:253 dwarn:0 dfail:0 fail:3 skip:29 time:413s
fi-ivb-3770 total:285 pass:252 dwarn:0 dfail:0 fail:0 skip:33 time:435s
fi-kbl-7500u total:285 pass:260 dwarn:1 dfail:0 fail:0 skip:24 time:474s
fi-kbl-7567u total:285 pass:265 dwarn:0 dfail:0 fail:0 skip:20 time:464s
fi-kbl-r total:285 pass:258 dwarn:0 dfail:0 fail:0 skip:27 time:513s
fi-pnv-d510 total:285 pass:219 dwarn:1 dfail:0 fail:0 skip:65 time:655s
fi-skl-6260u total:285 pass:265 dwarn:0 dfail:0 fail:0 skip:20 time:438s
fi-skl-6600u total:285 pass:258 dwarn:0 dfail:0 fail:0 skip:27 time:537s
fi-skl-6700hq total:285 pass:259 dwarn:0 dfail:0 fail:0 skip:26 time:544s
fi-skl-6700k2 total:285 pass:261 dwarn:0 dfail:0 fail:0 skip:24 time:499s
fi-skl-6770hq total:285 pass:265 dwarn:0 dfail:0 fail:0 skip:20 time:488s
fi-skl-guc total:285 pass:257 dwarn:0 dfail:0 fail:0 skip:28 time:427s
fi-skl-gvtdvm total:285 pass:262 dwarn:0 dfail:0 fail:0 skip:23 time:448s
fi-snb-2520m total:242 pass:208 dwarn:0 dfail:0 fail:0 skip:33
fi-snb-2600 total:285 pass:245 dwarn:0 dfail:0 fail:0 skip:40 time:398s
b3a4e70c4ef29d338f6da4bea7627e9145ef3382 drm-tip: 2018y-03m-19d-08h-13m-36s UTC integration manifest
aa737633e010 drm/i915: Configure GPU PM in ->suspend() if not configured
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_8389/issues.html
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^ permalink raw reply [flat|nested] 4+ messages in thread
* ✗ Fi.CI.IGT: warning for drm/i915: Configure GPU PM in ->suspend() if not configured
2018-03-19 10:15 [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured Rushikesh S Kadam
2018-03-19 10:33 ` Chris Wilson
2018-03-19 10:41 ` ✓ Fi.CI.BAT: success for " Patchwork
@ 2018-03-19 11:47 ` Patchwork
2 siblings, 0 replies; 4+ messages in thread
From: Patchwork @ 2018-03-19 11:47 UTC (permalink / raw)
To: Rushikesh S Kadam; +Cc: intel-gfx
== Series Details ==
Series: drm/i915: Configure GPU PM in ->suspend() if not configured
URL : https://patchwork.freedesktop.org/series/40173/
State : warning
== Summary ==
---- Possible new issues:
Test kms_vblank:
Subgroup pipe-b-ts-continuation-dpms-suspend:
pass -> DMESG-WARN (shard-apl)
Test pm_rc6_residency:
Subgroup rc6-accuracy:
pass -> SKIP (shard-snb)
---- Known issues:
Test drv_hangman:
Subgroup error-state-capture-blt:
pass -> INCOMPLETE (shard-snb) fdo#104058
Test kms_flip:
Subgroup 2x-plain-flip-fb-recreate-interruptible:
fail -> PASS (shard-hsw) fdo#100368
Test kms_frontbuffer_tracking:
Subgroup fbc-suspend:
pass -> DMESG-WARN (shard-apl) fdo#101623
Test kms_rotation_crc:
Subgroup primary-rotation-180:
fail -> PASS (shard-hsw) fdo#103925
Test kms_sysfs_edid_timing:
pass -> WARN (shard-apl) fdo#100047
Test kms_vblank:
Subgroup pipe-c-ts-continuation-dpms-suspend:
pass -> DMESG-WARN (shard-apl) k.org#196691
fdo#104058 https://bugs.freedesktop.org/show_bug.cgi?id=104058
fdo#100368 https://bugs.freedesktop.org/show_bug.cgi?id=100368
fdo#101623 https://bugs.freedesktop.org/show_bug.cgi?id=101623
fdo#103925 https://bugs.freedesktop.org/show_bug.cgi?id=103925
fdo#100047 https://bugs.freedesktop.org/show_bug.cgi?id=100047
k.org#196691 https://bugzilla.kernel.org/show_bug.cgi?id=196691
shard-apl total:3442 pass:1811 dwarn:4 dfail:0 fail:7 skip:1619 time:12967s
shard-hsw total:3442 pass:1768 dwarn:1 dfail:0 fail:1 skip:1671 time:11892s
shard-snb total:3378 pass:1333 dwarn:1 dfail:0 fail:2 skip:2041 time:7011s
Blacklisted hosts:
shard-kbl total:3442 pass:1933 dwarn:6 dfail:0 fail:10 skip:1493 time:9852s
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_8389/shards.html
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2018-03-19 10:15 [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured Rushikesh S Kadam
2018-03-19 10:33 ` Chris Wilson
2018-03-19 10:41 ` ✓ Fi.CI.BAT: success for " Patchwork
2018-03-19 11:47 ` ✗ Fi.CI.IGT: warning " Patchwork
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