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Sync 2 skylake i915 bug-fix patches with latest upstream version

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This commit is contained in:
Hans de Goede 2016-08-02 12:06:35 +02:00
parent 7178b87593
commit b4f8089833
4 changed files with 69 additions and 275 deletions
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43
Revert-ALSA-hda-remove-controller-dependency-on-i915.patch
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@ -1,43 +0,0 @@
From 89b9366047f51fcef7f7e36f2b351a98326c8656 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 12 Jul 2016 22:40:01 +0200
Subject: [PATCH] Revert "ALSA: hda - remove controller dependency on i915
power well for SKL"
This reverts commit 03b135cebc47d75ea2dc346770374ab741966955.
---
sound/pci/hda/hda_intel.c | 4 +++-
sound/pci/hda/patch_hdmi.c | 2 +-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index e320c44..290d60f 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -361,7 +361,9 @@ enum {
#define CONTROLLER_IN_GPU(pci) (((pci)->device == 0x0a0c) || \
((pci)->device == 0x0c0c) || \
((pci)->device == 0x0d0c) || \
- ((pci)->device == 0x160c))
+ ((pci)->device == 0x160c) || \
+ ((pci)->device == 0xa170) || \
+ ((pci)->device == 0x9d70))
#define IS_SKL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0xa170)
#define IS_SKL_LP(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x9d70)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index d0d5ad8..9203da1 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2379,7 +2379,7 @@ static int patch_i915_hsw_hdmi(struct hda_codec *codec)
/* For Haswell/Broadwell, the controller is also in the power well and
* can cover the codec power request, and so need not set this flag.
*/
- if (!is_haswell(codec) && !is_broadwell(codec))
+ if (!is_haswell(codec) && !is_broadwell(codec) && !is_skylake(codec))
codec->core.link_power_control = 1;
codec->patch_ops.set_power_state = haswell_set_power_state;
--
2.7.4

64
drm-i915-Acquire-audio-powerwell-for-HD-Audio-regist.patch Normal file
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@ -0,0 +1,64 @@
From 74f829a6e44fe217b6161f8935524fc807be0648 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sat, 9 Jul 2016 11:01:20 +0100
Subject: [PATCH] drm/i915: Acquire audio powerwell for HD-Audio registers
On Haswell/Broadwell, the HD-Audio block is inside the HDMI/display
power well and so the sna-hda audio codec acquires the display power
well while it is operational. However, Skylake separates the powerwells
again, but yet we still need the audio powerwell to setup the registers.
(But then the hardware uses those registers even while powered off???)
v2: Grab both rpm wakelock and audio wakelock
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96214
Fixes: 03b135cebc47 "ALSA: hda - remove dependency on i915 power well for SKL")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Libin Yang <libin.yang@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Marius Vlad <marius.c.vlad@intel.com>
---
drivers/gpu/drm/i915/intel_audio.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 5d5f6bc10e85..948a7a52e3f8 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -600,6 +600,8 @@ static void i915_audio_component_codec_wake_override(struct device *dev,
if (!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv))
return;
+ i915_audio_component_get_power(dev);
+
/*
* Enable/disable generating the codec wake signal, overriding the
* internal logic to generate the codec wake to controller.
@@ -615,6 +617,8 @@ static void i915_audio_component_codec_wake_override(struct device *dev,
I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
usleep_range(1000, 1500);
}
+
+ i915_audio_component_put_power(dev);
}
/* Get CDCLK in kHz */
@@ -648,6 +652,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
!IS_HASWELL(dev_priv))
return 0;
+ i915_audio_component_get_power(dev);
mutex_lock(&dev_priv->av_mutex);
/* 1. get the pipe */
intel_encoder = dev_priv->dig_port_map[port];
@@ -698,6 +703,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
unlock:
mutex_unlock(&dev_priv->av_mutex);
+ i915_audio_component_put_power(dev);
return err;
}
--
2.8.1

230
drm-i915-skl-Add-support-for-the-SAGV-fix-underrun-hangs.patch
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@ -1,230 +0,0 @@
From 5fc9d375bac02e054fcaaf14a06bebc6c7118008 Mon Sep 17 00:00:00 2001
From: "cpaul@redhat.com" <cpaul@redhat.com>
Date: Tue, 12 Jul 2016 13:36:03 -0400
Subject: [PATCH] drm/i915/skl: Add support for the SAGV, fix underrun hangs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Since the watermark calculations for Skylake are still broken, we're apt
to hitting underruns very easily under multi-monitor configurations.
While it would be lovely if this was fixed, it's not. Another problem
that's been coming from this however, is the mysterious issue of
underruns causing full system hangs. An easy way to reproduce this with
a skylake system:
- Get a laptop with a skylake GPU, and hook up two external monitors to
it
- Move the cursor from the built-in LCD to one of the external displays
as quickly as you can
- You'll get a few pipe underruns, and eventually the entire system will
just freeze.
After doing a lot of investigation and reading through the bspec, I
found the existence of the SAGV, which is responsible for adjusting the
system agent voltage and clock frequencies depending on how much power
we need. According to the bspec:
"The display engine access to system memory is blocked during the
adjustment time. SAGV defaults to enabled. Software must use the
GT-driver pcode mailbox to disable SAGV when the display engine is not
able to tolerate the blocking time."
The rest of the bspec goes on to explain that software can simply leave
the SAGV enabled, and disable it when we use interlaced pipes/have more
then one pipe active.
Sure enough, with this patchset the system hangs resulting from pipe
underruns on Skylake have completely vanished on my T460s. Additionally,
the bspec mentions turning off the SAGV with more then one pipe enabled
as a workaround for display underruns. While this patch doesn't entirely
fix that, it looks like it does improve the situation a little bit so
it's likely this is going to be required to make watermarks on Skylake
fully functional.
Changes since v2:
- Really apply minor style nitpicks to patch this time
Changes since v1:
- Added comments about this probably being one of the requirements to
fixing Skylake's watermark issues
- Minor style nitpicks from Matt Roper
- Disable these functions on Broxton, since it doesn't have an SAGV
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude <cpaul@redhat.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +
drivers/gpu/drm/i915/i915_reg.h | 5 ++
drivers/gpu/drm/i915/intel_pm.c | 110 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 117 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 608f8e44f353..274b57ac1a91 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1942,6 +1942,8 @@ struct drm_i915_private {
struct i915_suspend_saved_registers regfile;
struct vlv_s0ix_state vlv_s0ix_state;
+ bool skl_sagv_enabled;
+
struct {
/*
* Raw watermark latency values:
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b407411e31ba..9472949e8442 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7094,6 +7094,11 @@ enum skl_disp_power_wells {
#define HSW_PCODE_DE_WRITE_FREQ_REQ 0x17
#define DISPLAY_IPS_CONTROL 0x19
#define HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL 0x1A
+#define GEN9_PCODE_SAGV_CONTROL 0x21
+#define GEN9_SAGV_DISABLE 0x0
+#define GEN9_SAGV_LOW_FREQ 0x1
+#define GEN9_SAGV_HIGH_FREQ 0x2
+#define GEN9_SAGV_DYNAMIC_FREQ 0x3
#define GEN6_PCODE_DATA _MMIO(0x138128)
#define GEN6_PCODE_FREQ_IA_RATIO_SHIFT 8
#define GEN6_PCODE_FREQ_RING_RATIO_SHIFT 16
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index f764d284e6a0..439a38b08760 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2847,6 +2847,109 @@ skl_wm_plane_id(const struct intel_plane *plane)
}
static void
+skl_sagv_get_hw_state(struct drm_i915_private *dev_priv)
+{
+ u32 temp;
+ int ret;
+
+ if (IS_BROXTON(dev_priv))
+ return;
+
+ mutex_lock(&dev_priv->rps.hw_lock);
+ ret = sandybridge_pcode_read(dev_priv, GEN9_PCODE_SAGV_CONTROL, &temp);
+ mutex_unlock(&dev_priv->rps.hw_lock);
+
+ if (!ret) {
+ dev_priv->skl_sagv_enabled = !!(temp & GEN9_SAGV_DYNAMIC_FREQ);
+ } else {
+ /*
+ * If for some reason we can't access the SAGV state, follow
+ * the bspec and assume it's enabled
+ */
+ DRM_ERROR("Failed to get SAGV state, assuming enabled\n");
+ dev_priv->skl_sagv_enabled = true;
+ }
+}
+
+/*
+ * SAGV dynamically adjusts the system agent voltage and clock frequencies
+ * depending on power and performance requirements. The display engine access
+ * to system memory is blocked during the adjustment time. Having this enabled
+ * in multi-pipe configurations can cause issues (such as underruns causing
+ * full system hangs), and the bspec also suggests that software disable it
+ * when more then one pipe is enabled.
+ */
+static int
+skl_enable_sagv(struct drm_i915_private *dev_priv)
+{
+ int ret;
+
+ if (IS_BROXTON(dev_priv))
+ return 0;
+ if (dev_priv->skl_sagv_enabled)
+ return 0;
+
+ mutex_lock(&dev_priv->rps.hw_lock);
+ DRM_DEBUG_KMS("Enabling the SAGV\n");
+
+ ret = sandybridge_pcode_write(dev_priv, GEN9_PCODE_SAGV_CONTROL,
+ GEN9_SAGV_DYNAMIC_FREQ);
+ if (!ret)
+ dev_priv->skl_sagv_enabled = true;
+ else
+ DRM_ERROR("Failed to enable the SAGV\n");
+
+ /* We don't need to wait for SAGV when enabling */
+ mutex_unlock(&dev_priv->rps.hw_lock);
+ return ret;
+}
+
+static int
+skl_disable_sagv(struct drm_i915_private *dev_priv)
+{
+ int ret = 0;
+ unsigned long timeout;
+ u32 temp;
+
+ if (IS_BROXTON(dev_priv))
+ return 0;
+ if (!dev_priv->skl_sagv_enabled)
+ return 0;
+
+ mutex_lock(&dev_priv->rps.hw_lock);
+ DRM_DEBUG_KMS("Disabling the SAGV\n");
+
+ /* bspec says to keep retrying for at least 1 ms */
+ timeout = jiffies + msecs_to_jiffies(1);
+ do {
+ ret = sandybridge_pcode_write(dev_priv, GEN9_PCODE_SAGV_CONTROL,
+ GEN9_SAGV_DISABLE);
+ if (ret) {
+ DRM_ERROR("Failed to disable the SAGV\n");
+ goto out;
+ }
+
+ ret = sandybridge_pcode_read(dev_priv, GEN9_PCODE_SAGV_CONTROL,
+ &temp);
+ if (ret) {
+ DRM_ERROR("Failed to check the status of the SAGV\n");
+ goto out;
+ }
+ } while (!(temp & 0x1) && jiffies < timeout);
+
+ if (temp & 0x1) {
+ dev_priv->skl_sagv_enabled = false;
+ } else {
+ ret = -1;
+ DRM_ERROR("Request to disable SAGV timed out\n");
+ }
+
+out:
+ mutex_unlock(&dev_priv->rps.hw_lock);
+ return ret;
+}
+
+static void
skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
const struct intel_crtc_state *cstate,
struct skl_ddb_entry *alloc, /* out */
@@ -3525,6 +3628,11 @@ static void skl_write_wm_values(struct drm_i915_private *dev_priv,
struct drm_device *dev = dev_priv->dev;
struct intel_crtc *crtc;
+ if (dev_priv->active_crtcs == 1)
+ skl_enable_sagv(dev_priv);
+ else
+ skl_disable_sagv(dev_priv);
+
for_each_intel_crtc(dev, crtc) {
int i, level, max_level = ilk_wm_max_level(dev);
enum pipe pipe = crtc->pipe;
@@ -4072,6 +4180,8 @@ void skl_wm_get_hw_state(struct drm_device *dev)
skl_plane_relative_data_rate(cstate, pstate, 1);
}
}
+
+ skl_sagv_get_hw_state(dev_priv);
}
static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc)
--
2.7.4

7
kernel.spec
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@ -631,8 +631,7 @@ Patch835: 0001-Work-around-for-addition-of-metag-def-but-not-reloca.patch
# https://lists.fedoraproject.org/archives/list/kernel@lists.fedoraproject.org/message/A4YCP7OGMX6JLFT5V44H57GOMAQLC3M4/
Patch837: drm-amdgpu-Disable-RPM-helpers-while-reprobing.patch
Patch838: drm-i915-skl-Add-support-for-the-SAGV-fix-underrun-hangs.patch
Patch839: Revert-ALSA-hda-remove-controller-dependency-on-i915.patch
Patch838: drm-i915-Acquire-audio-powerwell-for-HD-Audio-regist.patch
#CVE-2016-6136 rhbz 1353533 1353534
Patch841: audit-fix-a-double-fetch-in-audit_log_single_execve_arg.patch
@ -2175,6 +2174,10 @@ fi
#
#
%changelog
* Tue Aug 2 2016 Hans de Goede <jwrdegoede@fedoraproject.org>
- Sync skylake hdaudio __unclaimed_reg WARN_ON fix with latest upstream version
- Drop drm-i915-skl-Add-support-for-the-SAGV-fix-underrun-hangs.patch for now
* Thu Jul 28 2016 Josh Boyer <jwboyer@fedoraproject.org>
- CVE-2016-5412 powerpc: kvm: Infinite loop in HV mode (rhbz 1349916 1361040)