Control: tags 884061 +patch On 2017-12-12, Nick Smallbone wrote: > I get this too after upgrading from 4.9.30-2+deb9u5 to 4.9.65-3. > Same dmesg error as Vagrant, together with either crazy flickering > or a hard crash. It happens usually about 30 seconds after starting X. > > I tried using "git bisect" on the upstream linux-stable repository. > It points the finger at the following commit: > > 7de694782cbe7840f2c0de6f1e70f41fc1b8b6e8 is the first bad commit > commit 7de694782cbe7840f2c0de6f1e70f41fc1b8b6e8 > Author: Maarten Lankhorst <maarten.lankho...@linux.intel.com> > Date: Thu Oct 19 17:13:40 2017 +0200 > > drm/i915: Do not rely on wm preservation for ILK watermarks > > commit 8777b927b92cf5b6c29f9f9d3c737addea9ac8a7 upstream.
Thanks for bisecting the issue!
I just tested simply reverting this patch with 4.9.65-3+deb9u1, and it's
been running without problem for at least three hours. So that confirms
that it works around the issue, at least.
I'm not sure if there's a better fix than simply reverting this; this is
clearly a regression for at least two users that makes the system almost
unusable.
From 4c01095ae53794023e772f9afb753bef67c3d84c Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagr...@debian.org>
Date: Thu, 28 Dec 2017 11:21:30 -0800
Subject: [PATCH] Revert "drm/i915: Do not rely on wm preservation for ILK
watermarks"
This reverts commit 7de694782cbe7840f2c0de6f1e70f41fc1b8b6e8.
---
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 52 +++++++++++++++++++++++-----------------
2 files changed, 31 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3ce9ba30d827..a19ec06f9e42 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -457,6 +457,7 @@ struct intel_crtc_scaler_state {
struct intel_pipe_wm {
struct intel_wm_level wm[5];
+ struct intel_wm_level raw_wm[5];
uint32_t linetime;
bool fbc_wm_enabled;
bool pipe_enabled;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 277a8026460b..49de4760cc16 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -27,7 +27,6 @@
#include <linux/cpufreq.h>
#include <drm/drm_plane_helper.h>
-#include <drm/drm_atomic_helper.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include "../../../platform/x86/intel_ips.h"
@@ -2018,9 +2017,9 @@ static void ilk_compute_wm_level(const struct
drm_i915_private *dev_priv,
const struct intel_crtc *intel_crtc,
int level,
struct intel_crtc_state *cstate,
- const struct intel_plane_state *pristate,
- const struct intel_plane_state *sprstate,
- const struct intel_plane_state *curstate,
+ struct intel_plane_state *pristate,
+ struct intel_plane_state *sprstate,
+ struct intel_plane_state *curstate,
struct intel_wm_level *result)
{
uint16_t pri_latency = dev_priv->wm.pri_latency[level];
@@ -2342,24 +2341,28 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state
*cstate)
struct intel_pipe_wm *pipe_wm;
struct drm_device *dev = state->dev;
const struct drm_i915_private *dev_priv = to_i915(dev);
- struct drm_plane *plane;
- const struct drm_plane_state *plane_state;
- const struct intel_plane_state *pristate = NULL;
- const struct intel_plane_state *sprstate = NULL;
- const struct intel_plane_state *curstate = NULL;
+ struct intel_plane *intel_plane;
+ struct intel_plane_state *pristate = NULL;
+ struct intel_plane_state *sprstate = NULL;
+ struct intel_plane_state *curstate = NULL;
int level, max_level = ilk_wm_max_level(dev), usable_level;
struct ilk_wm_maximums max;
pipe_wm = &cstate->wm.ilk.optimal;
- drm_atomic_crtc_state_for_each_plane_state(plane, plane_state,
&cstate->base) {
- const struct intel_plane_state *ps =
to_intel_plane_state(plane_state);
+ for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
+ struct intel_plane_state *ps;
- if (plane->type == DRM_PLANE_TYPE_PRIMARY)
+ ps = intel_atomic_get_existing_plane_state(state,
+ intel_plane);
+ if (!ps)
+ continue;
+
+ if (intel_plane->base.type == DRM_PLANE_TYPE_PRIMARY)
pristate = ps;
- else if (plane->type == DRM_PLANE_TYPE_OVERLAY)
+ else if (intel_plane->base.type == DRM_PLANE_TYPE_OVERLAY)
sprstate = ps;
- else if (plane->type == DRM_PLANE_TYPE_CURSOR)
+ else if (intel_plane->base.type == DRM_PLANE_TYPE_CURSOR)
curstate = ps;
}
@@ -2381,9 +2384,11 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state
*cstate)
if (pipe_wm->sprites_scaled)
usable_level = 0;
- memset(&pipe_wm->wm, 0, sizeof(pipe_wm->wm));
ilk_compute_wm_level(dev_priv, intel_crtc, 0, cstate,
- pristate, sprstate, curstate, &pipe_wm->wm[0]);
+ pristate, sprstate, curstate, &pipe_wm->raw_wm[0]);
+
+ memset(&pipe_wm->wm, 0, sizeof(pipe_wm->wm));
+ pipe_wm->wm[0] = pipe_wm->raw_wm[0];
if (IS_HASWELL(dev) || IS_BROADWELL(dev))
pipe_wm->linetime = hsw_compute_linetime_wm(cstate);
@@ -2393,8 +2398,8 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state
*cstate)
ilk_compute_wm_reg_maximums(dev, 1, &max);
- for (level = 1; level <= usable_level; level++) {
- struct intel_wm_level *wm = &pipe_wm->wm[level];
+ for (level = 1; level <= max_level; level++) {
+ struct intel_wm_level *wm = &pipe_wm->raw_wm[level];
ilk_compute_wm_level(dev_priv, intel_crtc, level, cstate,
pristate, sprstate, curstate, wm);
@@ -2404,10 +2409,13 @@ static int ilk_compute_pipe_wm(struct intel_crtc_state
*cstate)
* register maximums since such watermarks are
* always invalid.
*/
- if (!ilk_validate_wm_level(level, &max, wm)) {
- memset(wm, 0, sizeof(*wm));
- break;
- }
+ if (level > usable_level)
+ continue;
+
+ if (ilk_validate_wm_level(level, &max, wm))
+ pipe_wm->wm[level] = *wm;
+ else
+ usable_level = level;
}
return 0;
--
2.11.0
live well,
vagrant
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