This is a note to let you know that I've just added the patch titled
drm/i915: Do not rely on wm preservation for ILK watermarks
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-do-not-rely-on-wm-preservation-for-ilk-watermarks.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8777b927b92cf5b6c29f9f9d3c737addea9ac8a7 Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Date: Thu, 19 Oct 2017 17:13:40 +0200
Subject: drm/i915: Do not rely on wm preservation for ILK watermarks
MIME-Version: 1.0
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From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
commit 8777b927b92cf5b6c29f9f9d3c737addea9ac8a7 upstream.
The original intent was to preserve watermarks as much as possible
in intel_pipe_wm.raw_wm, and put the validated ones in intel_pipe_wm.wm.
It seems this approach is insufficient and we don't always preserve
the raw watermarks, so just use the atomic iterator we're already using
to get a const pointer to all bound planes on the crtc.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102373
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Acked-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20171019151341.4579-1-maarten.lankhorst@xxxxxxxxxxxxxxx
(cherry picked from commit 28283f4f359cd7cfa9e65457bb98c507a2cd0cd0)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_drv.h | 1
drivers/gpu/drm/i915/intel_pm.c | 52 ++++++++++++++++-----------------------
2 files changed, 22 insertions(+), 31 deletions(-)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -457,7 +457,6 @@ 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;
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -27,6 +27,7 @@
#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"
@@ -2017,9 +2018,9 @@ static void ilk_compute_wm_level(const s
const struct intel_crtc *intel_crtc,
int level,
struct intel_crtc_state *cstate,
- struct intel_plane_state *pristate,
- struct intel_plane_state *sprstate,
- struct intel_plane_state *curstate,
+ const struct intel_plane_state *pristate,
+ const struct intel_plane_state *sprstate,
+ const struct intel_plane_state *curstate,
struct intel_wm_level *result)
{
uint16_t pri_latency = dev_priv->wm.pri_latency[level];
@@ -2341,28 +2342,24 @@ static int ilk_compute_pipe_wm(struct in
struct intel_pipe_wm *pipe_wm;
struct drm_device *dev = state->dev;
const struct drm_i915_private *dev_priv = to_i915(dev);
- struct intel_plane *intel_plane;
- struct intel_plane_state *pristate = NULL;
- struct intel_plane_state *sprstate = NULL;
- struct intel_plane_state *curstate = NULL;
+ 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;
int level, max_level = ilk_wm_max_level(dev), usable_level;
struct ilk_wm_maximums max;
pipe_wm = &cstate->wm.ilk.optimal;
- for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
- struct intel_plane_state *ps;
+ 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);
- ps = intel_atomic_get_existing_plane_state(state,
- intel_plane);
- if (!ps)
- continue;
-
- if (intel_plane->base.type == DRM_PLANE_TYPE_PRIMARY)
+ if (plane->type == DRM_PLANE_TYPE_PRIMARY)
pristate = ps;
- else if (intel_plane->base.type == DRM_PLANE_TYPE_OVERLAY)
+ else if (plane->type == DRM_PLANE_TYPE_OVERLAY)
sprstate = ps;
- else if (intel_plane->base.type == DRM_PLANE_TYPE_CURSOR)
+ else if (plane->type == DRM_PLANE_TYPE_CURSOR)
curstate = ps;
}
@@ -2384,11 +2381,9 @@ static int ilk_compute_pipe_wm(struct in
if (pipe_wm->sprites_scaled)
usable_level = 0;
- ilk_compute_wm_level(dev_priv, intel_crtc, 0, cstate,
- 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];
+ ilk_compute_wm_level(dev_priv, intel_crtc, 0, cstate,
+ pristate, sprstate, curstate, &pipe_wm->wm[0]);
if (IS_HASWELL(dev) || IS_BROADWELL(dev))
pipe_wm->linetime = hsw_compute_linetime_wm(cstate);
@@ -2398,8 +2393,8 @@ static int ilk_compute_pipe_wm(struct in
ilk_compute_wm_reg_maximums(dev, 1, &max);
- for (level = 1; level <= max_level; level++) {
- struct intel_wm_level *wm = &pipe_wm->raw_wm[level];
+ for (level = 1; level <= usable_level; level++) {
+ struct intel_wm_level *wm = &pipe_wm->wm[level];
ilk_compute_wm_level(dev_priv, intel_crtc, level, cstate,
pristate, sprstate, curstate, wm);
@@ -2409,13 +2404,10 @@ static int ilk_compute_pipe_wm(struct in
* register maximums since such watermarks are
* always invalid.
*/
- if (level > usable_level)
- continue;
-
- if (ilk_validate_wm_level(level, &max, wm))
- pipe_wm->wm[level] = *wm;
- else
- usable_level = level;
+ if (!ilk_validate_wm_level(level, &max, wm)) {
+ memset(wm, 0, sizeof(*wm));
+ break;
+ }
}
return 0;
Patches currently in stable-queue which might be from maarten.lankhorst@xxxxxxxxxxxxxxx are
queue-4.9/drm-i915-do-not-rely-on-wm-preservation-for-ilk-watermarks.patch