Commit graph

18,303 commits

Author SHA1 Message Date
Daniel Vetter
e7f1d0b735 drm/i915: Update DRIVER_DATE to 20141121
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-21 10:37:14 +01:00
Dave Airlie
a0fc608178 Merge branch 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
fix one regression and one endian issue.

* 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: fix endian swapping in vbios fetch for tdp table
  drm/radeon: disable native backlight control on pre-r6xx asics (v2)
2014-11-21 12:19:19 +10:00
Dave Airlie
ed1e8777a5 Merge branch 'drm-next-3.19' of git://people.freedesktop.org/~agd5f/linux into drm-next
- More CI dpm fixes
- Initial DPM fan control for SI/CI (disabled by default)
- GPUVM multi-ring efficiency improvements
- Some cursor fixes

* 'drm-next-3.19' of git://people.freedesktop.org/~agd5f/linux: (22 commits)
  drm/radeon: update the VM after setting BO address v4
  drm/radeon: sync PT updates as shared v2
  drm/radeon: sync PD updates as shared
  drm/radeon: fence BO_VAs manually
  drm/radeon: use one VMID for each ring
  drm/radeon: track VM update fences separately
  drm/radeon: fence PT updates manually v2
  drm/radeon: split semaphore and sync object handling v2
  drm/radeon: remove unnecessary VM syncs
  drm/radeon: stop re-reserving the BO in radeon_vm_bo_set_addr
  drm/radeon: rework vm_flush parameters
  drm/radeon/ci: disable needless sclk changes
  drm/radeon/ci: force pcie level before sclk and mclk
  drm/radeon/ci: use different smc command for pcie dpm
  drm/radeon/ci: apply disp voltage changes before clk changes
  drm/radeon: fix PCC debugging message for CI DPM
  drm/radeon/dpm: add thermal dpm support for CI
  drm/radeon/dpm: add smc fan control for CI (v2)
  drm/radeon/dpm: add smc fan control for SI (v2)
  drm/radeon: work around a hw bug in MGCG on CIK
  ...
2014-11-21 12:17:43 +10:00
Markus Elfring
a3a1a6674f drm/vmwgfx: Deletion of an unnecessary check before the function call "vfree"
The vfree() function performes also input parameter validation. Thus the test
around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-11-21 12:16:40 +10:00
Markus Elfring
e9196d2385 drm/udl: Deletion of an unnecessary check before the function call "vunmap"
The vunmap() function performes also input parameter validation. Thus the test
around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-11-21 12:16:35 +10:00
Markus Elfring
c084481735 drm/tilcdc: Deletion of an unnecessary check before the function call "drm_fbdev_cma_hotplug_event"
The drm_fbdev_cma_hotplug_event() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-11-21 12:16:31 +10:00
Markus Elfring
9084acf19b drm/edid: Deletion of an unnecessary check before the function call "release_firmware"
The release_firmware() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-11-21 12:16:27 +10:00
Daniel Vetter
fc2d2bc1f1 drm/atomic: Add missing ERR_PTR casting
This is an oversight from

commit f52b69f1ec
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Nov 19 18:38:08 2014 +0100

    drm/atomic: Don't overrun the connector array when hotplugging

Cc: Dave Airlie <airlied@redhat.com>
Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-11-21 12:13:44 +10:00
Thomas Hellstrom
355a701838 drm/gem: Warn on illegal use of the dumb buffer interface v2
It happens on occasion that developers of generic user-space applications
abuse the dumb buffer API to get hold of drm buffers that they can both
mmap() and use for GPU acceleration, using the assumptions that dumb buffers
and buffers available for GPU are
a) The same type and can be aribtrarily type-casted.
b) fully coherent.

This patch makes the most widely used drivers warn nicely when that happens,
the next step will be to fail.

v2: Move drmP.h changes to drm_gem.h. Fix Radeon dumb mmap breakage.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-11-21 12:12:41 +10:00
Jesse Barnes
89a35ecdc6 drm/i915/g4x: fix g4x infoframe readout
Need to check the port too.

Reported-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 22:51:25 +01:00
Chris Wilson
d9e600b2e4 drm/i915: Only call mod_timer() if not already pending
The final arrangement of updating timer->expires and calling mod_timer()
used in

commit 672e7b7c18
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Nov 19 09:47:19 2014 +0000

    drm/i915: Don't continually defer the hangcheck

turns out to be very unsafe. Try again.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 22:48:34 +01:00
Daniel Vetter
bbd440fb81 drm/i915: Don't rely upon encoder->type for infoframe hw state readout
encoder->type can change underneath us and doesn't need to reflect
actual hw state (since we don't construct it from hw state like
e.g. encoder->crtc crtc->config).

And this can indeed happen:
1) Boot with plugged-in hdmi screen. Since we only set ->type in the
   probe functions this means we won't detect any infoframes since
   type is still unkown.
2) First probe sets type to HDMI.
3) If the first modeset now does _not_ happen on the HDMI pipe with
   infoframes encoder->get_config suddenly sees infoframes and the
   state checker gets angry.

Fix this by only relying on actual hw state when figuring out whether
the ddi port is in hdmi mode and sends infoframes.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Reported-by: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 22:37:04 +01:00
Christian König
2f2624c235 drm/radeon: update the VM after setting BO address v4
This way the necessary VM update is kicked off immediately
if all BOs involved are in GPU accessible memory.

v2: fix vm lock
v3: immediately update unmaps as well
v4: use drm_free_large instead of kfree

Tested-by: Kai Wasserbäch <kai@dev.carbon-project.org>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:20 -05:00
Christian König
d1968e1db8 drm/radeon: sync PT updates as shared v2
Only invalidating PTEs needs to be executed synchronized to using the PT.

v2: fix sync to uses

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:19 -05:00
Christian König
43ac885764 drm/radeon: sync PD updates as shared
We never invalidate PD entries and making them valid can
run with other users in parallel.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:19 -05:00
Christian König
94214635f0 drm/radeon: fence BO_VAs manually
This allows us to finally remove the VM fence and
so allow concurrent use of it from different engines.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:18 -05:00
Christian König
7c42bc1aa2 drm/radeon: use one VMID for each ring
Use multiple VMIDs for each VM, one for each ring. That allows
us to execute flushes separately on each ring, still not ideal
cause in a lot of cases rings can share IDs.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:18 -05:00
Christian König
ad1a58a45a drm/radeon: track VM update fences separately
Note for each fence if it's a VM page table update or not. This allows
us to determine the last VM update in a sync object and so to figure
out if we need to flush the TLB or not.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:17 -05:00
Christian König
587cdda8f7 drm/radeon: fence PT updates manually v2
This allows us to add the real execution fence as shared.

v2: fix typo

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:16 -05:00
Christian König
975700d2cc drm/radeon: split semaphore and sync object handling v2
Previously we just allocated space for four hardware semaphores
in each software semaphore object. Make software semaphore objects
represent only one hardware semaphore address again by splitting
the sync code into it's own object.

v2: fix typo in comment

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:16 -05:00
Christian König
e0602c35fe drm/radeon: remove unnecessary VM syncs
The PD/PTs reservation object now contains everything needed.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:15 -05:00
Christian König
85761f605a drm/radeon: stop re-reserving the BO in radeon_vm_bo_set_addr
That's useless when all callers drop the reservation
immediately after calling the function.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:15 -05:00
Christian König
faffaf620f drm/radeon: rework vm_flush parameters
Use ring structure instead of index and provide vm_id and pd_addr separately.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:14 -05:00
Alex Deucher
d967be9b80 drm/radeon/ci: disable needless sclk changes
The current code always reprogrammed the sclk levels,
but we don't currently handle disp sclk requirements
so just skip it.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:13 -05:00
Alex Deucher
7f6233ca87 drm/radeon/ci: force pcie level before sclk and mclk
Preferred ordering.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:13 -05:00
Alex Deucher
e745c3c9aa drm/radeon/ci: use different smc command for pcie dpm
Use unforce levels rather than enable mask instruction.
This is the preferred method.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:12 -05:00
Alex Deucher
f281d0a37c drm/radeon/ci: apply disp voltage changes before clk changes
Apply voltage changes for displays before changing clocks.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:12 -05:00
Alex Deucher
66648b81ce drm/radeon: fix PCC debugging message for CI DPM
Add missing newline and print the bad gpio shift.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:11 -05:00
Alex Deucher
0e4ed1c190 drm/radeon/dpm: add thermal dpm support for CI
Not currently used.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:10 -05:00
Alex Deucher
e03cea367f drm/radeon/dpm: add smc fan control for CI (v2)
Enable smc fan control for CI boards.  Should
reduce the fan noise on systems with a higher
default fan profile.

v2: disable by default, add additional fan setup, rpm control

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=73338

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:10 -05:00
Alex Deucher
39471ad39d drm/radeon/dpm: add smc fan control for SI (v2)
Enable smc fan control for SI boards.  Should
reduce the fan noise on systems with a higher
default fan profile.

v2: disable by default, add rpm controls

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=73338

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 13:00:09 -05:00
Alex Deucher
28731d5818 drm/radeon: fix endian swapping in vbios fetch for tdp table
Value needs to be swapped on BE.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-11-20 11:13:18 -05:00
Alex Deucher
b7bc596ebb drm/radeon: disable native backlight control on pre-r6xx asics (v2)
Just use the acpi interface.  That's what windows uses on this
generation and it's the only thing that seems to work reliably
on these generation parts.

You can still force the native backlight interface by setting
radeon.backlight=1

Bug:
https://bugzilla.kernel.org/show_bug.cgi?id=88501

v2: merge into above if/else block

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-11-20 11:12:55 -05:00
Alex Deucher
4bb62c95a7 drm/radeon: work around a hw bug in MGCG on CIK
Always need to set bit 0 of RLC_CGTT_MGCG_OVERRIDE
to avoid unreliable doorbell updates in some cases.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-11-20 11:11:43 -05:00
Michel Dänzer
3feba08d79 drm/radeon: Move radeon_cursor_move(_locked) to replace forward declaration
No functional change.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 11:11:42 -05:00
Michel Dänzer
78b1a6010b drm/radeon: Use cursor_set2 hook for enabling / disabling the HW cursor
The cursor_set2 hook provides the cursor hotspot position within the
cursor image. When the hotspot position changes, we can adjust the cursor
position such that the hotspot doesn't move on the screen. This prevents
the cursor from appearing to intermittently jump around on the screen
when the position of the hotspot within the cursor image changes.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-11-20 11:11:41 -05:00
Imre Deak
99990f1b0b drm/i915: remove the IRQs enabled WARN from intel_disable_gt_powersave
This function can be called now with i915 interrupts enabled, so the
corresponding WARN is incorrect, remove it. I think this was spotted by
Paulo during his review, but since I already removed the same WARN
from intel_suspend_gt_powersave() I missed then his point.

Spotted-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 17:00:59 +01:00
Daniel Vetter
cc1df8a3fe drm/i915: Use ggtt error obj capture helper for gen8 semaphores
Spotted while reading and trying to understand how our error capture
code deals with full ppgtt.

Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2014-11-20 16:59:49 +01:00
Imre Deak
2837ac4069 drm/i915: vlv: increase timeout when setting idle GPU freq
I saw punit timeouts in vlv_set_rps_idle() while running various
subtests of pm_rpm. Increasing the timeout to 100ms got rid of the
issue.

Testcase: igt/pm_rpm
Reference: https://bugs.freedesktop.org/show_bug.cgi?id=82939
Signed-off-by: Imre Deak <imre.deak@intel.com>
Tested-by: Guo Jinxian <jinxianx.guo@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 16:58:29 +01:00
Imre Deak
738c05c07d drm/i915: vlv: fix cdclk setting during modeset while suspended
Currently after doing DPMS-OFF on all outputs CDCLK won't be set to its
minimum value as it should. A subsequent modeset to turn off all outputs
will thus run with all power domains disabled, and notice that it needs
to change CDCLK to its minimum value. Since the power domains are
disabled this will emit a register-access-while-suspended WARN and fail
to set the minimum freq.

The proper solution for this is to set the minimum frequency during
DPMS-OFF. That needs a bigger rework that would take into account the
user DPMS setting too during the calculation of the new modesetting
configuration. Until that's done this stop-gap solution gets the PIPE-A
power domain during setting the CDCLK; this domain covers the HW blocks
needed for this.

Idea to use PIPE-A domain from Ville.

Testcase: igt/pm_rpm
Reference: https://bugs.freedesktop.org/show_bug.cgi?id=82939
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 16:58:11 +01:00
Daniel Vetter
55072d194c drm/i915: Dump hdmi pipe_config state
Makes it easier to debug infoframe mismatches.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2014-11-20 16:10:28 +01:00
Zhe Wang
7c859007fd drm/i915: Gen9 shadowed registers
For MMIO registers which are shadowed, force wake is not needed to
write to these registers.

v2: Rebase on top of nightly (Damien)

v3: Rebase on top of "Gen9 multiple-engine forcewake" changes

v4: (Mika, Bob, done by Damien)
- Reorder the shadowed registers by popularity

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Zhe Wang <zhe1.wang@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 15:08:41 +01:00
Zhe Wang
4597a88a1e drm/i915/skl: Gen9 multi-engine forcewake
Enable multi-engine forcewake for Gen9.

v2: (Damien)
- Rebase on top of nightly
- Move the register range definitions to intel_uncore.c
- Whitespace fixes

v3: (Addressing Mika's comment, done by Damien)
- Use REG_RANGE() (introduced after the patch was written)
- Add a SKL_NEEDS_FORCE_WAKE() macro that gets rid of a useless
  comparison to FORCEWAKE (reg 0xa18c is not used on SKL)

v4: (Damien)
- Use newly introduced ASSIGN_READ/WRITE_MMIO_VFUNCS() macros

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Zhe Wang <zhe1.wang@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 15:08:35 +01:00
Andrey Utkin
3943f42c11 Replace mentions of "list_struct" to "list_head"
There's no such thing as "list_struct".

Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-11-20 14:45:15 +01:00
Ville Syrjälä
6b312cd366 drm/i915: Read power well status before other registers for drpc info
Trying to read the status of the power wells right after taking forcewake
for the other register reads makes little sense. Most of the time the
power wells will still be up due to the recent forcewake. Instead do the
power well status read first, and only then read the register needing
forcewake. This way the reported power well status can actually reflect
what's going on in the system.

Cc: Deepak S <deepak.s@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 13:03:34 +01:00
Daniel Vetter
656bfa3afc drm/i915: Pin tiled objects for L-shaped configs
Let's just throw in the towel on this one and take the cheap way out.

Based on a patch from Chris Wilson, but checking for a different bit.
Chris' patch checked for even bank layout, this one here for a magic
bit. Given the evidence we've gathered (not much) both work I think,
but checking for the magic bit might be more accurate.

Anyway, works on my gm45 here.

For paranoi restrict to gen4 (and mobile), since we've only ever seen
this on gm45 and i965gm.

Also add some debugfs output so that we can skip the tiled swapping
tests properly in these cases.

v2: Clean up the quirk'ed pin count in free_object to avoid upsetting
the WARN_ON. Spotted by Chris.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=28813
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45092
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 13:03:33 +01:00
Tom O'Rourke
6985b35218 drm/i915: Update ring freq for full gpu freq range
In __gen6_update_ring_freq, use the full range of
possible gpu frequencies from max_freq to min_freq.
The actual gpu frequency could be outside the range
from max_freq_softlimit to min_freq_softlimit due
to power/thermal constraints.

Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 13:03:33 +01:00
Tom O'Rourke
c7f3153a61 drm/i915: change initial rps frequency for gen8
In gen8_enable_rps, change the initial rps setting
to the min_freq_softlimit (same as gen6_enable_rps).

Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 13:03:32 +01:00
Tom O'Rourke
f4ab408c4b drm/i915: Keep min freq above floor on HSW/BDW
Set the min_freq_softlimit to max(RPe, 450MHz).

Setting a floor can ensure a minimum experience
level.  The 450MHz value came from a power and
performance study of various types of workloads
(3D, Media, GPGPU, idle, etc).

v2: rebased

Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 13:03:32 +01:00
Tom O'Rourke
93ee29203f drm/i915: Use efficient frequency for HSW/BDW
Added gen6_init_rps_frequencies() to initialize
the rps frequency values.  This function replaces
parse_rp_state_cap().  In addition to reading RPn,
RP0, and RP1 from RP_STATE_CAP register, the new
function reads efficient frequency (aka RPe) from
pcode for Haswell and Broadwell and sets the turbo
softlimits.  The turbo minimum frequency softlimit
is set to RPe for Haswell and Broadwell and to RPn
otherwise.

For RPe, the efficiency is based on the frequency/power
ratio (MHz/W); this is considering GT power and not
package power.  The efficent frequency is the highest
frequency for which the frequency/power ratio is within
some threshold of the highest frequency/power ratio.
A fixed decrease in frequency results in smaller
decrease in power at frequencies less than RPe than
at frequencies above RPe.

v2: Following suggestions from Chris Wilson and
Daniel Vetter to extend and rename parse_rp_state_cap
and to open-code a poorly named function.

Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Remove unused variables.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-20 13:03:31 +01:00