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authorLuis R. Rodriguez <mcgrof@do-not-panic.com>2013-05-10 17:26:58 -0700
committerJohannes Berg <johannes.berg@intel.com>2013-05-13 13:19:39 +0200
commitda036bcec6ae71466f01cf512c57f11157fc6856 (patch)
tree2f610d38f8bc9e58e1dc7e2ee9d072b35d9bcd40 /dependencies
parent5f0e1c44ce120de7b8b214d561d4234987a7ae81 (diff)
backports: enable the CONFIG_DRM_QXL driver on >= v3.3
This provides a requirement of the new qxl DRM driver to be available only on kernels >= 3.3. The requirement comes from the usage of radix_tree_for_each_slot() that this uses the new radix bit-optimized iterator added via 78c1d7848 on 3.4. We backport this via the compat module but only for v3.3 given that addressing this backport for v3.2 requires addressing e2bdb933 which changes the radix_tree_node. qxl was added on next-20130415. mcgrof@frijol ~/linux-stable (git::master)$ git describe --contains 78c1d7848 v3.4-rc2~15^2~26 mcgrof@frijol ~/linux-stable (git::master)$ git describe --contains e2bdb933 v3.3-rc1~81^2~8 Someone wishing to #ifdef this to enable qxl support on v3.2 by using the old radix_tree_gang_lookup_slot() can look at 0fc9d1040313047edf6a39fd4d7c7defdca97c62 as an example collateral evolution change. commit f64122c1f6ade301585569863b4b3b18f6e4e332 Author: Dave Airlie <airlied@gmail.com> Date: Mon Feb 25 14:47:55 2013 +1000 drm: add new QXL driver. (v1.4) QXL is a paravirtual graphics device used by the Spice virtual desktop interface. The drivers uses GEM and TTM to manage memory, the qxl hw fencing however is quite different than normal TTM expects, we have to keep track of a number of non-linear fence ids per bo that we need to have released by the hardware. The releases are freed from a workqueue that wakes up and processes the release ring. releases are suballocated from a BO, there are 3 release categories, drawables, surfaces and cursor cmds. The hw also has 3 rings for commands, cursor and release handling. The hardware also have a surface id tracking mechnaism and the driver encapsulates it completely inside the kernel, userspace never sees the actual hw sur ids. This requires a newer version of the QXL userspace driver, so shouldn't be enabled until that has been placed into your distro of choice. Authors: Dave Airlie, Alon Levy v1.1: fixup some issues in the ioctl interface with padding v1.2: add module device table v1.3: fix nomodeset, fbcon leak, dumb bo create, release ring irq, don't try flush release ring (broken hw), fix -modesetting. v1.4: fbcon cpu usage reduction + suitable accel flags. Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'dependencies')
-rw-r--r--dependencies6
1 files changed, 6 insertions, 0 deletions
diff --git a/dependencies b/dependencies
index 5ae6bce5..c85577c9 100644
--- a/dependencies
+++ b/dependencies
@@ -47,6 +47,12 @@ MWIFIEX 2.6.27
HDMI 3.2
DRM 3.2
DRM_TTM 3.2
+# See e2bdb933, this was added on v3.3, in order to
+# support DRM_QXL on 3.2 you'd have to backport 78c1d7848
+# to 3.2 on BACKPORT_BUILD_RADIX_HELPERS and that requires
+# taking into consideration the radix_tree_node rcu change
+# on e2bdb933.
+DRM_QXL 3.3
# Regulator
# Because of -EPROBE_DEFER see commit d1c3414c and note that