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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-25 23:25:05 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-25 23:25:05 -0300
commit0debdc742aa5bd7ef72eb8ee954e33d69965c116 (patch)
treeafc6395c3761c5fc5e6cdb7717d25c3ecf2cbb91 /kernels/linux-libre-knock/0001-disabling-primary-plane-in-the-noatomic-case.patch
parent7715378fa44fa28e0c09b3903ddf0e9e6f28cbd6 (diff)
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linux-libre-knock-4.3.3_gnu-2: update config and patches for armv7h; fix hangs on older intel hardware
Diffstat (limited to 'kernels/linux-libre-knock/0001-disabling-primary-plane-in-the-noatomic-case.patch')
-rw-r--r--kernels/linux-libre-knock/0001-disabling-primary-plane-in-the-noatomic-case.patch56
1 files changed, 56 insertions, 0 deletions
diff --git a/kernels/linux-libre-knock/0001-disabling-primary-plane-in-the-noatomic-case.patch b/kernels/linux-libre-knock/0001-disabling-primary-plane-in-the-noatomic-case.patch
new file mode 100644
index 000000000..241b1012e
--- /dev/null
+++ b/kernels/linux-libre-knock/0001-disabling-primary-plane-in-the-noatomic-case.patch
@@ -0,0 +1,56 @@
+From 634b3a4a476e96816d5d6cd5bb9f8900a53f56ba Mon Sep 17 00:00:00 2001
+From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
+Date: Mon, 23 Nov 2015 10:25:28 +0100
+Subject: drm/i915: Do a better job at disabling primary plane in the noatomic
+ case.
+
+When disable_noatomic is called plane_mask is not correct yet, and
+plane_state->visible = true is left as true after disabling the primary
+plane.
+
+Other planes are already disabled as part of crtc sanitization, only the
+primary is left active. But the plane_mask is not updated here. It gets
+updated during fb takeover in modeset_gem_init, or set to the new value
+on resume.
+
+This means that to disable the primary plane 1 << drm_plane_index(primary)
+needs to be used.
+
+Afterwards because the crtc is no longer active it's forbidden to keep
+plane_state->visible set, or a WARN_ON in
+intel_plane_atomic_calc_changes triggers. There are other code points
+that rely on accurate plane_state->visible too, so make sure the bool is
+cleared.
+
+The other planes are already disabled in intel_sanitize_crtc, so they
+don't have to be handled here.
+
+Cc: stable@vger.kernel.org #v4.3, v4.2?
+Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92655
+Tested-by: Tomas Mezzadra <tmezzadra@gmail.com>
+Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
+Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
+Link: http://patchwork.freedesktop.org/patch/msgid/5652DB88.9070208@linux.intel.com
+(cherry picked from commit 54a4196188eab82e6f0a5f05716626e9f18b8fb6)
+Signed-off-by: Jani Nikula <jani.nikula@intel.com>
+
+diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
+index 22e86d2..62211ab 100644
+--- a/drivers/gpu/drm/i915/intel_display.c
++++ b/drivers/gpu/drm/i915/intel_display.c
+@@ -6309,9 +6309,11 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
+ if (to_intel_plane_state(crtc->primary->state)->visible) {
+ intel_crtc_wait_for_pending_flips(crtc);
+ intel_pre_disable_primary(crtc);
++
++ intel_crtc_disable_planes(crtc, 1 << drm_plane_index(crtc->primary));
++ to_intel_plane_state(crtc->primary->state)->visible = false;
+ }
+
+- intel_crtc_disable_planes(crtc, crtc->state->plane_mask);
+ dev_priv->display.crtc_disable(crtc);
+ intel_crtc->active = false;
+ intel_update_watermarks(crtc);
+--
+cgit v0.10.2
+