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  1. 20 6月, 2012 11 次提交
  3. 19 6月, 2012 4 次提交
  5. 18 6月, 2012 4 次提交
  7. 16 6月, 2012 1 次提交
    • D
      drm/i915/crt: Do not rely upon the HPD presence pin · aaa37730
      由 Daniel Vetter 提交于 
      VGA hotplug detection "works" by measuring the resistance across
certain pins. A lot of kvm switches fumble this and wire up cheap
resistors with the wrong resistance or don't bother at all.

To accomodate these, also try to detect a connected monitor by trying
to grab the edid. Contrary to !HAS_HOTPLUG platforms we don't bother
with an actual load-detection cycle when the output is life - that
would be actual work to implement because things moved around. This is
the big difference to Chris Wilson's original approach:

commit 9e612a00
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Thu May 31 13:08:53 2012 +0100

    drm/i915/crt: Do not rely upon the HPD presence pin

This blew up on Linus' machine because it errornously detected a vga
screen (without and edid and hence only the default modes), leading to
it's prompt removal:

commit 8f53369b
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri Jun 8 14:53:06 2012 -0700

    Revert "drm/i915/crt: Do not rely upon the HPD presence pin"

Some digging around in Bspec shows the reason why load detect doesn't work on
newer chips - the legacy VGA load detect bit isn't wired up any longer:

Public Snb Bspec, Vol3 Part1, 1.1.1 ST00 Input Status 0, bit4:

"RGB Comparator / Sense. This bit is here for compatibility and will
always return one. Monitor detection must be done be done through the
programming of registers in the MMIO space.
0 = Below threshold
1 = Above threshold"

v2: Add a comment in the code that load detect on hotplug capable
machines is broken and pimp the commit message with a quote of Bspec
to show why.
Reported-and-tested-by: NMatthieu LAVIE <boiteamadmax@hotmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50501Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      aaa37730
  9. 14 6月, 2012 16 次提交
    • B
      drm/i915: reset the GPU on context fini · 8e96d9c4
      由 Ben Widawsky 提交于 
      It's the only way we know how to make the GPU actually forget about the
default context.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      8e96d9c4
    • B
      drm/i915/context: switch contexts with execbuf2 · 6e0a69db
      由 Ben Widawsky 提交于 
      Use the rsvd1 field in execbuf2 to specify the context ID associated
with the workload. This will allow the driver to do the proper context
switch when/if needed.

v2: Add checks for context switches on rings not supporting contexts.
Before the code would silently ignore such requests.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      6e0a69db
    • B
      drm/i915/context: create & destroy ioctls · 84624813
      由 Ben Widawsky 提交于 
      Add the interfaces to allow user space to create and destroy contexts.
Contexts are destroyed automatically if the file descriptor for the dri
device is closed.

Following convention as usual here causes checkpatch warnings.

v2: with is_initialized, no longer need to init at create
drop the context switch on create (daniel)

v3: Use interruptible lock (Chris)
return -ENODEV in !GEM case (Chris)
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      84624813
    • B
      drm/i915: switch to default context on idle · f2ef6eb1
      由 Ben Widawsky 提交于 
      To keep things as sane as possible, switch to the default context before
idling. This should help free context objects, as well as put things in
a more well defined state before suspending.

v2: remove seqno from context switch call (daniel)
return error on failed context switch instead of WARN+continue (daniel)

v3: move idling to i915_gpu idle (from i915_gem_idle) (Chris)
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      f2ef6eb1
    • B
      drm/i915: add ccid to error state · b9a3906b
      由 Ben Widawsky 提交于 
      Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      b9a3906b
    • B
      drm/i915: use the default context · dfabbcb4
      由 Ben Widawsky 提交于 
      With the code to do HW context switches in place have the driver load the
default context for the render ring when the driver loads.

The default context will be an ever present context that is available to
switch to at any time for the given ring.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      dfabbcb4
    • B
      drm/i915: possibly invalidate TLB before context switch · 12b0286f
      由 Ben Widawsky 提交于 
      From http://intellinuxgraphics.org/documentation/SNB/IHD_OS_Vol1_Part3.pdf

[DevSNB] If Flush TLB invalidation Mode is enabled it's the driver's
responsibility to invalidate the TLBs at least once after the previous
context switch after any GTT mappings changed (including new GTT
entries).  This can be done by a pipelined PIPE_CONTROL with TLB inv bit
set immediately before MI_SET_CONTEXT.

On GEN7 the invalidation mode is explicitly set, but this appears to be
lacking for GEN6. Since I don't know the history on this, I've decided
to dynamically read the value at ring init time, and use that value
throughout.

v2: better comment (daniel)
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      12b0286f
    • B
      drm/i915: PIPE_CONTROL_TLB_INVALIDATE · cc0f6398
      由 Ben Widawsky 提交于 
      This has showed up in several other patches. It's required for the next
context workaround.

I tested this one on its own and saw no differences in basic tests
(performance or otherwise). This patch is relatively likely to cause
regressions, hence why it's split out.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      cc0f6398
    • B
      drm/i915: Ivybridge MI_ARB_ON_OFF context w/a · e37ec39b
      由 Ben Widawsky 提交于 
      The workaround itself applies to gen7 only (according to the docs) and
as Eric Anholt points out shouldn't be required since we don't use HW
scheduling features, and therefore arbitration. Though since it is a
small, and simple addition, and we don't really understand the issue,
just do it.

FWIW, I eventually want to play with some of the arbitration stuff, and
I'd hate to forget about this.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      e37ec39b
    • D
      drm/i915: ensure context objects are bound to the global gtt · 3af7b857
      由 Daniel Vetter 提交于 
      This way round we don't introduce and ugly layering violations and use
the interface as I planned to use it.
Signed-Off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      3af7b857
    • B
      drm/i915: context switch implementation · e0556841
      由 Ben Widawsky 提交于 
      Implement the context switch code as well as the interfaces to do the
context switch. This patch also doesn't match 1:1 with the RFC patches.
The main difference is that from Daniel's responses the last context
object is now stored instead of the last context. This aids in allows us
to free the context data structure, and context object independently.

There is room for optimization: this code will pin the context object
until the next context is active. The optimal way to do it is to
actually pin the object, move it to the active list, do the context
switch, and then unpin it. This allows the eviction code to actually
evict the context object if needed.

The context switch code is missing workarounds, they will be implemented
in future patches.

v2: actually do obj->dirty=1 in switch (daniel)
Modified comment around above
Remove flags to context switch (daniel)
Move mi_set_context code to i915_gem_context.c (daniel)
Remove seqno , use lazy request instead (daniel)

v3: use i915_gem_request_next_seqno instead of
      outstanding_lazy_request (Daniel)
remove id's from trace events (Daniel)
Put the context BO in the instruction domain (Daniel)
Don't unref the BO is context switch fails (Chris)
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      e0556841
    • B
      drm/i915: context basic create & destroy · 40521054
      由 Ben Widawsky 提交于 
      Invent an abstraction for a hw context which is passed around through
the core functions. The main bit a hw context holds is the buffer object
which backs the context. The rest of the members are just helper
functions. Specifically the ring member, which could likely go away if
we decide to never implement whatever other hw context support exists.

Of note here is the introduction of the 64k alignment constraint for the
BO. If contexts become heavily used, we should consider tweaking this
down to 4k. Until the contexts are merged and tested a bit though, I
think 64k is a nice start (based on docs).

Since we don't yet switch contexts, there is really not much complexity
here. Creation/destruction works pretty much as one would expect. An idr
is used to generate the context id numbers which are unique per file
descriptor.

v2: add DRM_DEBUG_DRIVERS to distinguish ENOMEM failures (ben)
convert a BUG_ON to WARN_ON, default destruction is still fatal (ben)
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      40521054
    • B
      drm/i915: preliminary context support · 254f965c
      由 Ben Widawsky 提交于 
      Very basic code for context setup/destruction in the driver.

Adds the file i915_gem_context.c This file implements HW context
support. On gen5+ a HW context consists of an opaque GPU object which is
referenced at times of context saves and restores.  With RC6 enabled,
the context is also referenced as the GPU enters and exists from RC6
(GPU has it's own internal power context, except on gen5).  Though
something like a context does exist for the media ring, the code only
supports contexts for the render ring.

In software, there is a distinction between contexts created by the
user, and the default HW context. The default HW context is used by GPU
clients that do not request setup of their own hardware context. The
default context's state is never restored to help prevent programming
errors. This would happen if a client ran and piggy-backed off another
clients GPU state.  The default context only exists to give the GPU some
offset to load as the current to invoke a save of the context we
actually care about. In fact, the code could likely be constructed,
albeit in a more complicated fashion, to never use the default context,
though that limits the driver's ability to swap out, and/or destroy
other contexts.

All other contexts are created as a request by the GPU client. These
contexts store GPU state, and thus allow GPU clients to not re-emit
state (and potentially query certain state) at any time. The kernel
driver makes certain that the appropriate commands are inserted.

There are 4 entry points into the contexts, init, fini, open, close.
The names are self-explanatory except that init can be called during
reset, and also during pm thaw/resume. As we expect our context to be
preserved across these events, we do not reinitialize in this case.

As Adam Jackson pointed out, The cutoff of 1MB where a HW context is
considered too big is arbitrary. The reason for this is even though
context sizes are increasing with every generation, they have yet to
eclipse even 32k. If we somehow read back way more than that, it
probably means BIOS has done something strange, or we're running on a
platform that wasn't designed for this.

v2: rename load/unload to init/fini (daniel)
remove ILK support for get_size() (indirectly daniel)
add HAS_HW_CONTEXTS macro to clarify supported platforms (daniel)
added comments (Ben)
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      254f965c
    • B
      drm/i915: CXT_SIZE register offsets added · fe1cc68f
      由 Ben Widawsky 提交于 
      The GPUs can have different default context layouts, and the sizes could
vary based on platform or BIOS. In order to back the context object with
a properly sized BO, we must read this register in order to find out a
sufficient size.

Thankfully (sarcarm!), the register moves and changes meanings
throughout generations.

CTX and CXT differences are intentional as that is how it is in the
documentation (prior to GEN6 it was CXT).
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
      fe1cc68f
    • S
      drm/i915: ignore pipe select bit when checking for LVDS register initialization · 14d94a3d
      由 Seth Forshee 提交于 
      The Lenovo Thinkpad T410 has the LVDS_PIPEB_SELECT bit set in the LVDS
register when booted with the lid closed, even though the LVDS hasn't
really been initialized. Ignore this bit so that the VBT value will be
used instead.
Signed-off-by: NSeth Forshee <seth.forshee@canonical.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      14d94a3d
    • C
      drm/i915: Switch off FBC when disabling the primary plane when obscured · 93314b5b
      由 Chris Wilson 提交于 
      As we switch on/off the primary plane if it is completely obscured by an
overlapping video sprite, we also nee to make sure that we update the
FBC configuration at the same time.

v2: Not all crtcs are intel_crtcs, as spotted by Daniel.
v3: Boot testing rules.

References: https://bugs.freedesktop.org/show_bug.cgi?id=50238Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: NJani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      93314b5b
  11. 13 6月, 2012 4 次提交