openwrt/staging/blogic.git
9 years agodrm/i915: Consolidate DDI clock reading out in a single function
Damien Lespiau [Fri, 12 Dec 2014 14:26:57 +0000 (14:26 +0000)]
drm/i915: Consolidate DDI clock reading out in a single function

2 pieces of code need to read out the DDI clock: the DDI encoder and the
MST encoder .get_config() vfuncs.

Until now the SKL read out code was only in the former, so let's move
the pre and post SKL logic in intel_ddi_clock_get() and this this one
everywhere.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Parsing LFP brightness control from VBT
Deepak M [Mon, 15 Dec 2014 10:28:21 +0000 (15:58 +0530)]
drm/i915: Parsing LFP brightness control from VBT

LFP brighness control from the VBT block 43 indicates which
controller is used for brightness.
LFP1 brightness control method:
Bit 7-4 = This field controller number of the brightnes controller.
0 = Controller 0
1 = Controller 1
2 = Controller 2
3 = Controller 3
Others = Reserved
Bits 3-0 = This field specifies the brightness control pin to be used on the
platform.
0 = PMIC pin is used for brightness control
1 = LPSS PWM is used for brightness control
2 = Display DDI is used for brightness control
3 = CABC method to control brightness
Others = Reserved

Adding the above fields in dev_priv->vbt and corresponding changes in
parse_backlight()

v2: Jani's review comments addressed
- Move PWM definitions to intel_bios.h
- Moving vbt_version to intel_vbt_data
- Rename brightness to bl_ctrl_data
- Logging just control_pin instead of string
- Avoid adding vbt_version in dev_priv
- Since only DDI option is available as of now, let control pin DDI
affect dev_priv->vbt.backlight.present

v3: Jani's review comments addressed
- Drop control_pin
- Use bdb->version
- set controller to 0 instead of using control pin define
- check controller bounds
- remove superfluous changes in intel_parse_bios

Signed-off-by: Deepak M <m.deepak@intel.com>
Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: Correcting the flushing of pipe
Sonika Jindal [Thu, 11 Dec 2014 12:28:15 +0000 (17:58 +0530)]
drm/i915/skl: Correcting the flushing of pipe

We were incorreectly bypassing the flush everytime which led to fifo
underrun when more than one plane is enabled.

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Satheeshakrishna M<satheeshakrishna.m@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bdw: Enable execlists by default where supported
Thomas Daniel [Thu, 11 Dec 2014 12:48:35 +0000 (12:48 +0000)]
drm/i915/bdw: Enable execlists by default where supported

Execlist support in the i915 driver is now considered good enough for the
feature to be enabled by default on Gen8 and later and routinely tested.
Adjusted i915 parameters structure initialization to reflect this and updated
the comment in intel_sanitize_enable_execlists().

There's still work to do before we can let the wider massive onto it,
but there's still time left before the 3.20 cutoff.

v2: Update the MODULE_PARM_DESC too.

Issue: VIZ-2020
Signed-off-by: Thomas Daniel <thomas.daniel@intel.com>
[danvet: Add note that there's still some work left to do.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: Correctly updating sprite wm parameter
Sonika Jindal [Tue, 9 Dec 2014 05:29:15 +0000 (10:59 +0530)]
drm/i915/skl: Correctly updating sprite wm parameter

The pipe wm parameters is not correctly updated with sprite parameters
because it copies them for each plane from plane_list to the sprite
offset in pipe wm parameters. Since plane_list also contains primary and
cursor planes, we end up updating wrong params for sprites.

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Documentation for multiple GGTT views
Tvrtko Ursulin [Wed, 10 Dec 2014 17:27:59 +0000 (17:27 +0000)]
drm/i915: Documentation for multiple GGTT views

A short section describing background, implementation and intended usage.

v2:
    * Align section name between template and DOC comment. (Michel Thierry)

For: VIZ-4544
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Infrastructure for supporting different GGTT views per object
Tvrtko Ursulin [Wed, 10 Dec 2014 17:27:58 +0000 (17:27 +0000)]
drm/i915: Infrastructure for supporting different GGTT views per object

Things like reliable GGTT mappings and mirrored 2d-on-3d display will need
to map objects into the same address space multiple times.

Added a GGTT view concept and linked it with the VMA to distinguish between
multiple instances per address space.

New objects and GEM functions which do not take this new view as a parameter
assume the default of zero (I915_GGTT_VIEW_NORMAL) which preserves the
previous behaviour.

This now means that objects can have multiple VMA entries so the code which
assumed there will only be one also had to be modified.

Alternative GGTT views are supposed to borrow DMA addresses from obj->pages
which is DMA mapped on first VMA instantiation and unmapped on the last one
going away.

v2:
    * Removed per view special casing in i915_gem_ggtt_prepare /
      finish_object in favour of creating and destroying DMA mappings
      on first VMA instantiation and last VMA destruction. (Daniel Vetter)
    * Simplified i915_vma_unbind which does not need to count the GGTT views.
      (Daniel Vetter)
    * Also moved obj->map_and_fenceable reset under the same check.
    * Checkpatch cleanups.

v3:
    * Only retire objects once the last VMA is unbound.

v4:
    * Keep scatter-gather table for alternative views persistent for the
      lifetime of the VMA.
    * Propagate binding errors to callers and handle appropriately.

v5:
    * Explicitly look for normal GGTT view in i915_gem_obj_bound to align
      usage in i915_gem_object_ggtt_unpin. (Michel Thierry)
    * Change to single if statement in i915_gem_obj_to_ggtt. (Michel Thierry)
    * Removed stray semi-colon in i915_gem_object_set_cache_level.

For: VIZ-4544
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
[danvet: Drop hunk from i915_gem_shrink since it's just prettification
but upsets a __must_check warning.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Forcewake Register Range changes for CHV
Deepak S [Thu, 11 Dec 2014 16:12:49 +0000 (21:42 +0530)]
drm/i915: Forcewake Register Range changes for CHV

According to updated BSpec, Render/Common/media Wells register range changed.
Updating the same to match the spec and avoid extra forcewake for none
forcewake range.

v2: Update media forcewake range (Ville)

Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Changes related to the sequence port no for
Gaurav K Singh [Wed, 10 Dec 2014 16:37:40 +0000 (22:07 +0530)]
drm/i915: Changes related to the sequence port no for

From now on for both DSI Ports A & C, the seq_port value has been
set to 0. seq_port value is parsed from Sequence block#53 of VBT.
So, for packets that needs to be read/write for DSI single link on
Port A and Port C will now be based on the DVO port from VBT block 2,
instead of seq_port.

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Use BUILD_BUG if possible in the i915 WARN_ON
Daniel Vetter [Mon, 8 Dec 2014 15:40:10 +0000 (16:40 +0100)]
drm/i915: Use BUILD_BUG if possible in the i915 WARN_ON

Faster feedback to errors is always better. This is inspired by the
addition to WARN_ONs to mask/enable helpers for registers to make sure
callers have the arguments ordered correctly: Pretty much always the
arguments are static.

We use WARN_ON(1) a lot in default switch statements though where we
should always handle all cases. So add a new macro specifically for
that.

The idea to use __builtin_constant_p is from Chris Wilson.

v2: Use the ({}) gcc-ism to avoid the static inline, suggested by
Dave. My first attempt used __cond as the temp var, which is the same
used by BUILD_BUG_ON, but with inverted sense. Hilarity ensued, so
sprinkle i915 into the name.

Also use a temporary variable to only evaluate the condition once,
suggested by Damien.

v3: It's crazy but apparently 32bit gcc can't compile out the
BUILD_BUG_ON in a lot of cases and just falls over. I have no idea
why, but until clue grows just disable this nifty idea on 32bit
builds. Reported by 0-day builder.

v4: Got it all wrong, apparently its the gcc version. We need 4.9+.
Now reported by Imre.

v5: Chris suggested to add the case to MISSING_CASE for speedier
debug.

v6: Even some gcc 4.9 versions don't see through the maze, so give up
for now. Keep the skeleton and MISSING_CASE stuff though.

Cc: Imre Deak <imre.deak@intel.com>
Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Name the lrc irq handler correctly
Daniel Vetter [Wed, 10 Dec 2014 16:41:43 +0000 (17:41 +0100)]
drm/i915: Name the lrc irq handler correctly

We consistently use the _irq_handler postfix for functions called in
hardirq context. Especially when it's a non-static function hardirq is
a crazy enough calling context to warrant this level of ocd. So rename
it.

Cc: Thomas Daniel <thomas.daniel@intel.com>
Reviewed-by: Thomas Daniel <thomas.daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915/bdw: Add WaForceEnableNonCoherent label
Michel Thierry [Wed, 10 Dec 2014 09:43:37 +0000 (09:43 +0000)]
drm/i915/bdw: Add WaForceEnableNonCoherent label

We already implement this workaround, but it was missing its name.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Protect against leaks in pipe_crc_set_source
Daniel Vetter [Wed, 10 Dec 2014 10:00:29 +0000 (11:00 +0100)]
drm/i915: Protect against leaks in pipe_crc_set_source

Stupid userspace (there is no evil userspace in debugfs by assumption)
might provoke a leak since we allocate the new array without holding
any locks. Drop in an unconditional kfree to deal with this - kfree
can handle NULL.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Make i915_pipe_crc_read() oops proof
Ville Syrjälä [Tue, 9 Dec 2014 19:28:32 +0000 (21:28 +0200)]
drm/i915: Make i915_pipe_crc_read() oops proof

Currently i915_pipe_crc_read() will drop pipe_crc->lock for the entire
duration of the copy_to_user() loop, which means it'll access
pipe_crc->entries without any protection. If another thread sneaks in
and frees pipe_crc->entries the code will oops.

Reorganize the code to hold the lock around everything except
copy_to_user(). After the copy the lock is reacquired and the the number
of available entries is rechecked.

Since this is a debug feature simplify the error handling a bit by
consuming the crc entry even if copy_to_user() would fail.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Allocate the pipe_crc->entires with kcalloc()
Ville Syrjälä [Tue, 9 Dec 2014 19:28:31 +0000 (21:28 +0200)]
drm/i915: Allocate the pipe_crc->entires with kcalloc()

pipe_crc->entries[] is an array so allocate with kcalloc() instead of
kzalloc().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Protect pipe_crc->entries update
Ville Syrjälä [Tue, 9 Dec 2014 19:28:30 +0000 (21:28 +0200)]
drm/i915: Protect pipe_crc->entries update

Set the pipe_crc->entries pointer while holding the relevant spinlock.
Doesn't matter too much since a spurious pipe crc interrupt would then
just update one entry but later that entry would get cleared when head
and tail are both set to 0. But being a bit more paranoid doesn't hurt.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix CRC support for DP port D on CHV
Ville Syrjälä [Tue, 9 Dec 2014 19:28:29 +0000 (21:28 +0200)]
drm/i915: Fix CRC support for DP port D on CHV

Add the missing CRC control register value for DP port D on CHV.
Untested as I don't have a CHV machine with DP on port D.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add a check to only allow DP D on chv, not vlv.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Engage the DP scramble reset for pipe C on CHV
Ville Syrjälä [Tue, 9 Dec 2014 19:28:28 +0000 (21:28 +0200)]
drm/i915: Engage the DP scramble reset for pipe C on CHV

To get stable CRCs from the DP CRC source we need to reset the
scrambler for each frame. Enable the reset feature when grabbing
CRCs for pipe C on CHV. Pipes A and B were already covered due
sharing the code with VLV.

We can safely extend PIPE_SCRAMBLE_RESET_MASK to deal with CHV since
the extra bit was MBZ on the older platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add headers to the various render state
Damien Lespiau [Tue, 9 Dec 2014 17:23:22 +0000 (17:23 +0000)]
drm/i915: Add headers to the various render state

intel-gpu-tools now generates the render state with license headers and
the version of i-g-t that generated the files.

A similar patch was previously sent but wasn't actually generated with
the make target so was lacking the i-g-t revision. So here another
version before we totally forget about this.

Cc: Armin Reese <armin.c.reese@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Introduce FBC DocBook.
Rodrigo Vivi [Mon, 8 Dec 2014 14:46:31 +0000 (06:46 -0800)]
drm/i915: Introduce FBC DocBook.

No functional changes.

v2 (Paulo): Rebase.
v3: Accept Daniel's suggestions:
    * remove unclear and duplicated explanation.
    * remove marketing like doc and replace by a simple one.
    * remove bdw_fbc_sw_flush documentation.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Software workaround for getting the HW status of DSI Port C on BYT
Gaurav K Singh [Tue, 9 Dec 2014 05:29:20 +0000 (10:59 +0530)]
drm/i915: Software workaround for getting the HW status of DSI Port C on BYT

Due to hardware limitations on BYT, MIPI Port C DPI Enable bit
does not get set. To check whether DSI Port C was enabled in BIOS,
check the Pipe B enable bit for DSI Port C. In hardware, DSI Port C
is linked with Pipe B.

v2: Addressed review comments of Jani, Nikula
    - Used platform checks for this software workaround for BYT

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Enable MIPI PHY transparent latch for DSI Port C
Gaurav K Singh [Sun, 7 Dec 2014 10:43:54 +0000 (16:13 +0530)]
drm/i915: Enable MIPI PHY transparent latch for DSI Port C

Common bit to be used for both DSI Port A & DSI Port C.

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Use DSI Pll1 for enabling MIPI DSI on Port C
Gaurav K Singh [Tue, 9 Dec 2014 05:27:00 +0000 (10:57 +0530)]
drm/i915: Use DSI Pll1 for enabling MIPI DSI on Port C

DSI Pll1 is used for enabling DSI on Port C.

v2: Addressed review comments of Jani
    - Used & operator instead of == for intel_dsi->ports

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add MI_SET_APPID cmd to cmd parser tables
Michael H. Nguyen [Fri, 21 Nov 2014 17:35:36 +0000 (09:35 -0800)]
drm/i915: Add MI_SET_APPID cmd to cmd parser tables

Was missing.

Issue: VIZ-4701
Signed-off-by: Michael H. Nguyen <michael.h.nguyen@intel.com>
Reviewed-by: Jon Bloomfield <jon.bloomfield@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Move FBC stuff to intel_fbc.c
Rodrigo Vivi [Mon, 8 Dec 2014 16:09:10 +0000 (14:09 -0200)]
drm/i915: Move FBC stuff to intel_fbc.c

No functional changes. This is just the begin of a FBC rework.

v2 (Paulo):
  - Revert intel_fbc_init() changed parameter.
  - Revert set_no_fbc_reason() rename.
  - Rebase.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Check mask/bit helper functions
Daniel Vetter [Mon, 8 Dec 2014 15:30:00 +0000 (16:30 +0100)]
drm/i915: Check mask/bit helper functions

After a bit of irc discussion we've concluded that it would be prudent
to check that callers use the mask/enable paramters correctly. So add
a WARN_ON.

Spurred by Damien's bugfix which added _MASKED_FIELD.

v2: We use WARN_ON(1) a lot to catch default cases in switch blocks
which should always be extended. So this doesn't work really. Dunno
why gcc only started complaining when I've moved the WARN out of the
static inline helper to address a feedback from Jani.

Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Move golden context init into ->init_context
Daniel Vetter [Tue, 2 Dec 2014 15:19:07 +0000 (16:19 +0100)]
drm/i915: Move golden context init into ->init_context

Similar to a patch from Thomas Daniel for lrc contexts. This keeps
both sides somewhat in sync and should make Dave Gordon happy.

Note that both the wa and the golden context init code suffer a bit
from an inssuficient split into driver load and hw init code. Which
means we have a bunch of tests all over the place to check whether the
one-time initialization has been done already or not.

All that one-tim code should be moved into the one-time ring setup
code, but that's work for later.

Cc: Dave Gordon <david.s.gordon@intel.com>
Cc: Thomas Daniel <thomas.daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agogpu: drm: i915: intel_display.c: Remove unused function
Rickard Strandqvist [Sun, 7 Dec 2014 18:29:17 +0000 (19:29 +0100)]
gpu: drm: i915: intel_display.c: Remove unused function

Remove the function intel_output_name() that is not used anywhere.

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Additional request structure tracing
John Harrison [Fri, 5 Dec 2014 13:49:36 +0000 (13:49 +0000)]
drm/i915: Additional request structure tracing

Added the request structure's 'uniq' identifier to the trace information. Also
renamed the '_complete' trace event to '_notify' as it actually happens in the
IRQ 'notify_ring()' function. The intention is to add a new '_complete' trace
event which occurs when a request structure is actually marked as complete.
However, at the moment the completion status is re-tested every time the query
is made so there isn't a completion event as such.

v2: New patch added to series.

v3: Rebased to remove completion caching as that is apparently contentious.

Change-Id: Ic9bcde67d175c6c03b96217cdcb6e4cc4aa45d67
For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add unique id to the request structure for debugging
John Harrison [Fri, 5 Dec 2014 13:49:35 +0000 (13:49 +0000)]
drm/i915: Add unique id to the request structure for debugging

For debugging purposes, it is useful to be able to uniquely identify a given
request structure as it works its way through the system. This becomes
especially tricky once the seqno value is lazily allocated as then the request
has nothing but its pointer to identify it for much of its life.

Change-Id: Ie76b2268b940467f4cdf5a4ba6f5a54cbb96445d
For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Zero fill the request structure
John Harrison [Fri, 5 Dec 2014 13:49:34 +0000 (13:49 +0000)]
drm/i915: Zero fill the request structure

There is a general theory that kzmalloc is better/safer than kmalloc, especially
for interesting data structures. This change updates the request structure
allocation to be zero filled.

This also fixes crashes in the reset code. Quoting Mika's patch:

"Clean the request structure on alloc. Otherwise we might end up
referencing uninitialized fields.  This is apparent when we try to
cleanup the preallocated request on ring reset, before any request has
been submitted to the ring.  The request->ctx is foobar and we end up
freeing the foobarness."

Note that this fixes a regression introduced in

commit 9eba5d4a1d79d5094321469479b4dbe418f60110
Author: John Harrison <John.C.Harrison@Intel.com>
Date:   Mon Nov 24 18:49:23 2014 +0000

    drm/i915: Ensure OLS & PLR are always in sync

References: https://bugs.freedesktop.org/show_bug.cgi?id=86959
References: https://bugs.freedesktop.org/show_bug.cgi?id=86962
References: https://bugs.freedesktop.org/show_bug.cgi?id=86992
Change-Id: I68715ef758025fab8db763941ef63bf60d7031e2
For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix up seqno -> request merge issues
John Harrison [Fri, 5 Dec 2014 13:49:33 +0000 (13:49 +0000)]
drm/i915: Fix up seqno -> request merge issues

The display related patches earlier in this series were edited during merge to
improve the request unreferencing. Specifically, the need for de-referencing at
interrupt time was removed. However, the resulting code did a 'deref(req) ; req
= NULL' sequence rather than using the 'req_assign(req, NULL)' wrapper. The two
are functionally equivalent, but using the wrapper is more consistent with all
the other places where requests are assigned.

Note that the whole point of the wrapper is that using it everywhere that
request pointers are assigned means that the reference counting is done
automatically and can't be accidentally forgotten about. Plus it allows simpler
future maintainance if the reference counting mechanisms ever need to change.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Make all plane disables use 'update_plane' (v5)
Matt Roper [Thu, 4 Dec 2014 18:27:42 +0000 (10:27 -0800)]
drm/i915: Make all plane disables use 'update_plane' (v5)

If we extend the commit_plane handlers for each plane type to be able to
handle fb=0, then we can easily implement plane disable via the
update_plane handler.  The cursor plane already works this way, and this
is the direction we need to go to integrate with the atomic plane
handler.  We can now kill off the type-specific disable functions, as
well as the redundant intel_plane_disable() (not to be confused with
intel_disable_plane()).

Note that prepare_plane_fb() only gets called as part of update_plane
when fb!=NULL (by design, to match the semantics of the atomic plane
helpers); this means that our commit_plane handlers need to handle the
frontbuffer tracking for the disable case, even though they don't handle
it for normal updates.

v2:
 - Change BUG_ON to WARN_ON (Ander/Daniel)

v3:
 - Drop unnecessary plane->crtc check since a previous patch to plane
   update ensures that plane->crtc will always be non-NULL, even for
   disable calls that might pass NULL from userspace.  (Ander)
 - Drop a s/crtc/plane->crtc/ hunk that was unnecessary.  (Ander)

v4:
 - Fix missing whitespace (Ander)

v5:
 - Use state's crtc rather than plane's crtc in
   intel_check_primary_plane().  plane->crtc could be NULL, but we've
   already fixed up state->crtc to ensure it's non-NULL (even if
   userspace passed it as NULL during a disable call).  (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Ensure state->crtc is non-NULL for plane updates
Matt Roper [Mon, 1 Dec 2014 23:40:17 +0000 (15:40 -0800)]
drm/i915: Ensure state->crtc is non-NULL for plane updates

When disabling a plane, it is legal to pass crtc = NULL.  Since planes
on Intel hardware are tied to a fixed CRTC, go ahead and set state->crtc
to the appropriate crtc in cases where it is passed to us as NULL.

In a future patch, we will start using the update handler for plane
disables, so this will help ensure we always have a non-NULL crtc
pointer to work with.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Consolidate top-level .update_plane() handlers
Matt Roper [Mon, 1 Dec 2014 23:40:16 +0000 (15:40 -0800)]
drm/i915: Consolidate top-level .update_plane() handlers

Our .update_plane() handlers do the same check/prepare/commit/cleanup
steps regardless of plane type.  Consolidate them all into a single
function that calls check/commit through a vtable.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Consolidate plane 'cleanup' operations (v3)
Matt Roper [Tue, 2 Dec 2014 15:45:25 +0000 (07:45 -0800)]
drm/i915: Consolidate plane 'cleanup' operations (v3)

All plane update functions need to unpin the old framebuffer when
flipping to a new one.  Pull this logic into a separate function to ease
the integration with atomic plane helpers.

v2: Don't wait for vblank if we don't have an old fb to cleanup (Ander)

v3: Really don't wait for vblank if we don't have an old fb to cleanup.
    Previous version only handled this for primary planes; we need the
    same change on cursors/sprites too!  (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Consolidate plane 'prepare' functions (v2)
Matt Roper [Mon, 1 Dec 2014 23:40:14 +0000 (15:40 -0800)]
drm/i915: Consolidate plane 'prepare' functions (v2)

The 'prepare' step for all types of planes are pretty similar;
consolidate the three 'prepare' functions into a single function.  This
paves the way for future integration with the atomic plane handlers.

Note that we pull the 'wait for pending flips' functionality out of the
primary plane's prepare step and place it directly in the 'setplane'
code.  When we move to the atomic plane handlers, this code will be in
the 'atomic begin' step.

v2: Update GEM fb tracking for physical cursors also (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Make intel_plane_state subclass drm_plane_state
Matt Roper [Mon, 1 Dec 2014 23:40:13 +0000 (15:40 -0800)]
drm/i915: Make intel_plane_state subclass drm_plane_state

Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Introduce intel_prepare_cursor_plane() (v2)
Matt Roper [Mon, 1 Dec 2014 23:40:12 +0000 (15:40 -0800)]
drm/i915: Introduce intel_prepare_cursor_plane() (v2)

Primary and sprite planes have already been refactored to include a
'prepare' step which handles all the commit-time operations that could
fail (i.e., pinning buffers and such).  Refactor the cursor commit in a
similar manner.

For simplicity and consistency with other plane types, we also switch to
using intel_pin_and_fence_fb_obj() to perform our pinning for
non-physical cursors.  This will allow us to more easily migrate the
code into the atomic 'begin' handler in a plane-agnostic manner in a
future patchset.

v2:
 - Update GEM fb tracking for physical cursors too. (Ander)
 - Use intel_unpin_fb_obj() rather than
   i915_gem_object_unpin_from_display_plane() and do so while holding
   struct_mutex.  (Ander)
 - Update plane->fb in commit_cursor_plane.  This isn't really necessary
   since the DRM core does this for us in __setplane_internal(), but
   doing it in our driver once we know we're going to succeed helps
   avoid confusion. (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: remove intel_pipe_set_base() (v4)
Gustavo Padovan [Mon, 1 Dec 2014 23:40:11 +0000 (15:40 -0800)]
drm/i915: remove intel_pipe_set_base() (v4)

After some refactor intel_primary_plane_setplane() does the same
as intel_pipe_set_base() so we can get rid of it and replace the calls
with intel_primary_plane_setplane().

v2: take Ville's comments:
- get the right arguments for update_plane()
- use drm_crtc_get_hv_timing()

v3 (by Matt):
 - Rebase to latest di-nightly codebase
 - Use primary->funcs->update_plane() in __intel_set_mode()
 - Use primary->funcs->disable_plane() in intel_crtc_disable()

v4 (by Matt):
 - Drop redundant calls to intel_crtc_wait_for_pending_flips() before
   calling update_plane() (Ville)

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-and-mourned-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: remove intel_crtc_cursor_set_obj() (v5)
Gustavo Padovan [Mon, 1 Dec 2014 23:40:10 +0000 (15:40 -0800)]
drm/i915: remove intel_crtc_cursor_set_obj() (v5)

Merge it into the plane update_plane() callback and make other
users use the update_plane() functions instead.

The fb != crtc->cursor->fb was already inside intel_crtc_cursor_set_obj()
so we fold intel_crtc_cursor_set_obj() inside intel_commit_cursor_plane()
and merge both paths into one.

v5 (by Matt):
 - Rebase onto latest di-nightly codebase
 - Drop extra unreference call when we fail to pin (Ville)

Reviewed-by(v4): Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: add helper to get crtc timings (v5)
Gustavo Padovan [Mon, 1 Dec 2014 23:40:09 +0000 (15:40 -0800)]
drm: add helper to get crtc timings (v5)

We need to get hdisplay and vdisplay in a few places so create a
helper to make our job easier.

Note that drm_crtc_check_viewport() and intel_modeset_pipe_config() were
previously making adjustments for doublescan modes and vscan > 1 modes,
which was incorrect.  Using our new helper fixes this mistake.

v2 (by Matt): Use new stereo doubling function (suggested by Ville)

v3 (by Matt):
 - Add missing kerneldoc (Daniel)
 - Use drm_mode_copy() (Jani)

v4 (by Matt):
 - Drop stereo doubling function again; add 'stereo only' flag
   to drm_mode_set_crtcinfo() instead (Ville)

v5 (by Matt):
 - Note behavioral change in drm_crtc_check_viewport() and
   intel_modeset_pipe_config(). (Ander)
 - Describe new adjustment flags in drm_mode_set_crtcinfo()'s
   kerneldoc. (Ander)

Cc: dri-devel@lists.freedesktop.org
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Update DRIVER_DATE to 20141205
Daniel Vetter [Fri, 5 Dec 2014 14:59:16 +0000 (15:59 +0100)]
drm/i915: Update DRIVER_DATE to 20141205

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bdw: Add WaHdcDisableFetchWhenMasked
Michel Thierry [Thu, 4 Dec 2014 15:07:52 +0000 (15:07 +0000)]
drm/i915/bdw: Add WaHdcDisableFetchWhenMasked

We already have it for chv, but was missing for bdw.

Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Update the DSI enable path to support dual
Gaurav K Singh [Fri, 5 Dec 2014 08:54:21 +0000 (14:24 +0530)]
drm/i915: Update the DSI enable path to support dual

We need to program both port registers during dual link enable path.

v2: Address review comments by Jani
    - Used a for loop instead of do-while loop.

v3: Used for_each_dsi_port macro instead of for loop

v4: Renamed mode_hactive variable to mode_hdisplay

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Update the DSI disable path to support dual link panel disabling
Gaurav K Singh [Fri, 5 Dec 2014 08:52:44 +0000 (14:22 +0530)]
drm/i915: Update the DSI disable path to support dual link panel disabling

We need to program both port registers during dual link disable path.

v2: Address review comments by Jani
    - Used a for loop instead of do-while loop.

v3: Used for_each_dsi_port macro instead of for loop

v4: Added comments for the usage of AFE latchout bit

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: MIPI Timings related changes for dual link
Gaurav K Singh [Thu, 4 Dec 2014 05:28:54 +0000 (10:58 +0530)]
drm/i915: MIPI Timings related changes for dual link

hactive, hfp, hbp, hsync needs to be halved for dual link MIPI Panels.
Accordingly timing related mmio regs needs to be programmed for both MIPI Ports.

v2: Address review comments by Jani
    - Used a for loop instead of do-while loop

v3: Used for_each_dsi_port macro instead of for loop

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: cck reg used for checking DSI Pll locked
Gaurav K Singh [Fri, 5 Dec 2014 08:46:58 +0000 (14:16 +0530)]
drm/i915: cck reg used for checking DSI Pll locked

Instead of pipe configuration reg, cck reg to be used for checking whether
DSI Pll is getting locked or not.

v2: dpio_lock unlocked now in case DSI PLL lock fails

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Enable DSI PLL for both DSI0 and DSI1 in case of dual link
Gaurav K Singh [Thu, 4 Dec 2014 05:28:52 +0000 (10:58 +0530)]
drm/i915: Enable DSI PLL for both DSI0 and DSI1 in case of dual link

For Dual link MIPI Panels, dsipll clock for both DSI0 and DSI1 needs to be enabled.

v2: Address review comments by Jani
    - Added wait time for PLL to be locked.

v3: separate patch created for cck read for checking PLL to be locked

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Dual link needs Shutdown and Turn on packet for both ports
Gaurav K Singh [Thu, 4 Dec 2014 05:28:51 +0000 (10:58 +0530)]
drm/i915: Dual link needs Shutdown and Turn on packet for both ports

For dual link MIPI panels, SHUTDOWN packet needs to send to both Ports
A & C during MIPI encoder disabling sequence. Similarly, TURN ON packet
to be sent to both Ports during MIPI encoder enabling sequence.

v2: Address review comments by Jani
    - Used a for loop instead of do-while loop.

v3: Used for_each_dsi_port macro instead of for loop

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Pixel Clock changes for DSI dual link
Gaurav K Singh [Fri, 5 Dec 2014 08:43:41 +0000 (14:13 +0530)]
drm/i915: Pixel Clock changes for DSI dual link

For dual link MIPI Panels, each port needs half of pixel clock. Pixel overlap
can be enabled if needed by panel, then in that case, pixel clock will be
increased for extra pixels.

v2 : Address review comments by Jani
     - Removed the bit mask used for ->dual_link
     - Used DSI instead of MIPI for #define variables

v3: Added the VLV_DISPLAY_BASE to VLV_CHICKEN_3 register

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add support for port enable/disable for dual link configuration
Gaurav K Singh [Fri, 5 Dec 2014 08:39:28 +0000 (14:09 +0530)]
drm/i915: Add support for port enable/disable for dual link configuration

For Dual Link MIPI Panels, both Port A and Port C should be enabled
during the MIPI encoder enabling sequence. Similarly, during the
disabling sequence, both ports needs to be disabled.

v2: Used for_each_dsi_port macro instead of for loop

v3: Used intel_dsi->ports instead of dual_link var for dual link configuration check

v4: Masking of the required MIPI port bits before writing proper values

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: s/MI_STORE_DWORD_IMM_GEN8/MI_STORE_DWORD_IMM_GEN4/
Ville Syrjälä [Fri, 14 Nov 2014 16:16:56 +0000 (18:16 +0200)]
drm/i915: s/MI_STORE_DWORD_IMM_GEN8/MI_STORE_DWORD_IMM_GEN4/

MI_STORE_DWORD_IMM length has been the same ever since gen4. Rename
the define to avoid potential confusion if someone tries to use this
on pre-gen8.

Also correct the comment on MI_MEM_VIRTUAL bit. It's present on 945,g33
and 965 only.

Cc: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add USE_GGTT define for g4x+ too.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: release struct_mutex on the i915_gem_init_hw fail path
Jani Nikula [Fri, 5 Dec 2014 12:17:42 +0000 (14:17 +0200)]
drm/i915: release struct_mutex on the i915_gem_init_hw fail path

Release struct_mutex if init_rings() fails.

This is a regression introduced in
commit 35a57ffbb10840af219eeaf64718434242bb7c76
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Nov 20 00:33:07 2014 +0100

    drm/i915: Only init engines once

Reported-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Added port as parameter to the functions which does read/write of DSI Contr...
Gaurav K Singh [Thu, 4 Dec 2014 05:28:48 +0000 (10:58 +0530)]
drm/i915: Added port as parameter to the functions which does read/write of DSI Controller

This patch is in preparation of DSI dual link panels. For dual link
panels, few packets needs to be sent to Port A or Port C or both. Based
on the portno from MIPI Sequence Block#53, these sequences needs to be
sent accordingly.

v2: Addressed review comments by Jani
    - port variables named properly

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: New functions added for enabling & disabling MIPI Port Ctrl reg
Gaurav K Singh [Thu, 4 Dec 2014 05:28:47 +0000 (10:58 +0530)]
drm/i915: New functions added for enabling & disabling MIPI Port Ctrl reg

This patch is in preparation for the DSI dual link
port enable and disable related changes.

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't display nonsensical values in i915_ddb_info on gen < 9
Damien Lespiau [Wed, 3 Dec 2014 17:33:24 +0000 (17:33 +0000)]
drm/i915: Don't display nonsensical values in i915_ddb_info on gen < 9

When playing around with debugfs and a HSW machine I noticed that we
were displaying some garbled value in i915_ddb_info. This debugfs file
is only meaningful for gen9+, so don't display anything on earlier
platforms.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Stop putting GGTT VMA at the head of the list
Tvrtko Ursulin [Wed, 3 Dec 2014 14:59:24 +0000 (14:59 +0000)]
drm/i915: Stop putting GGTT VMA at the head of the list

Multiple GGTT VMAs per object will be introduced in the near future which will
make it impossible to guarantee normal GGTT view is at the head of the list.

Purpose of this patch is to break this assumption straight away so any
potential hidden assumptions in the code base can be bisected to this
simple patch.

For: VIZ-4544
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: Update the DDI translation values for DP/eDP 1.3
Damien Lespiau [Wed, 26 Nov 2014 13:37:26 +0000 (13:37 +0000)]
drm/i915/skl: Update the DDI translation values for DP/eDP 1.3

Hardware team updated the recommended translation values for DP/eDP 1.3.
This should help with some stability and HBR2 issues.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Satheeshakrishna M<satheeshakrishna.m@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Move init_unused_rings to gem_init_hw
Daniel Vetter [Thu, 20 Nov 2014 08:45:19 +0000 (09:45 +0100)]
drm/i915: Move init_unused_rings to gem_init_hw

We need to do that every time we resume the rings, not just at load.
I've overlooked this in my untangling of the ring init code.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix startup failure in LRC mode after recent init changes
Thomas Daniel [Tue, 2 Dec 2014 12:50:48 +0000 (12:50 +0000)]
drm/i915: Fix startup failure in LRC mode after recent init changes

A previous commit introduced engine init changes:

    commit 372ee59699d9 ("drm/i915: Only init engines once")

This broke execlists as intel_lr_context_render_state_init was trying to emit
commands to the RCS for the default context before the ring->init_hw was called.

Made a new gen8_init_rcs_context function and assign in to render ring
init_context.  Moved call to intel_logical_ring_workarounds_emit into
gen8_init_rcs_context to maintain previous functionality.

Moved call to render_state_init from lr_context_deferred_create into
gen8_init_rcs_context, and modified deferred_create to call ring->init_context
for non-default contexts.

Modified i915_gem_context_enable to call ring->init_context for the default
context.

So init_context will now always be called when the hw is ready - in
i915_gem_context_enable for the default context and in lr_context_deferred_create
for other contexts.

Signed-off-by: Thomas Daniel <thomas.daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert pxvid to extvid lookup table to a function
Mika Kuoppala [Mon, 1 Dec 2014 16:01:05 +0000 (18:01 +0200)]
drm/i915: Convert pxvid to extvid lookup table to a function

The conversion table can be replaced with simple enough function.

   text    data     bss     dec     hex filename
 839688   10987      24  850699   cfb0b drivers/gpu/drm/i915/i915.ko
 839224   10987      24  850235   cf93b drivers/gpu/drm/i915/i915.ko

Result is 494 saved bytes (.05525%).

v2: - no run on sentences from subject (Chris, Jani)
    - be verbose about the savings (Chris, Daniel)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v1)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Flatten engine init control flow
Daniel Vetter [Wed, 19 Nov 2014 23:33:08 +0000 (00:33 +0100)]
drm/i915: Flatten engine init control flow

Now that sanity prevails and we have the clean split between software
init and starting the engines we can drop all the "have we allocate
this struct already?" nonsense.

Execlist code could benefit quite a bit more still, but that's for
another patch.

Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Remove unnecessary goto in intel_primary_plane_disable()
Ander Conselvan de Oliveira [Thu, 27 Nov 2014 13:32:34 +0000 (15:32 +0200)]
drm/i915: Remove unnecessary goto in intel_primary_plane_disable()

The same logic can be implemented without it, and it even saves a line
of code.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Only init engines once
Daniel Vetter [Wed, 19 Nov 2014 23:33:07 +0000 (00:33 +0100)]
drm/i915: Only init engines once

We can do this.

And now there's finally the clean split between software setup and
hardware setup I kinda wanted since multi-ring support was merged
aeons ago. It only took almost 5 years.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Move intel_init_pipe_control out of engine->init_hw
Daniel Vetter [Wed, 19 Nov 2014 23:33:06 +0000 (00:33 +0100)]
drm/i915: Move intel_init_pipe_control out of engine->init_hw

With this all the ->init_hw hooks really only set up hw state needed
to start the ring, all the software state setup and memory/buffer
allocations happen beforehand.

v2: We need to call intel_init_pipe_control after the ring init since
otherwise engine->dev is NULL and it falls over. Currently that's
now after the hw ring is enabled but a) we'll be fine as long as no
one submits a batch b) this will change soon.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: s/init()/init_hw()/ in intel_engine_cs
Daniel Vetter [Wed, 19 Nov 2014 23:33:04 +0000 (00:33 +0100)]
drm/i915: s/init()/init_hw()/ in intel_engine_cs

This is (mostly, some exceptions that need fixing) the hw setup
function which starts the ring. And not the function which allocates
all the resources.

Make this clear by giving it a better name.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Consolidate ring freespace calculations
Dave Gordon [Thu, 27 Nov 2014 11:22:49 +0000 (11:22 +0000)]
drm/i915: Consolidate ring freespace calculations

There are numerous places in the code where the driver's idea of
how much space is left in a ring is updated using the driver's
latest notions of the positions of 'head' and 'tail' for the ring.
Among them are some that update one or both of these values before
(re)doing the calculation. In particular, there are four different
places in the code where 'last_retired_head' is copied to 'head'
and then set to -1; and two of these do not have a guard to check
that it has actually been updated since last time it was consumed,
leaving the possibility that the dummy -1 can be transferred from
'last_retired_head' to 'head', causing the space calculation to
produce 'impossible' results (previously seen on Android/VLV).

This code therefore consolidates all the calculation and updating of
these values, such that there is only one place where the ring space
is updated, and it ALWAYS uses (and consumes) 'last_retired_head' if
(and ONLY if) it has been updated since the last call.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Make ring freespace calculation more robust
Dave Gordon [Thu, 27 Nov 2014 11:22:48 +0000 (11:22 +0000)]
drm/i915: Make ring freespace calculation more robust

The used space in a ring is given by the cyclic distance from the
consumer (HEAD) to the producer (TAIL), i.e. ((tail-head) MOD size);
conversely, the available space in a ring is the cyclic distance
from the producer to the consumer, MINUS the amount reserved for a
"gap" that is supposed to guarantee that the producer never catches
up with or overruns the consumer. Note that some GEN h/w requires
that TAIL never approach to within one cacheline of HEAD, so the gap
is usually set to twice the cacheline size to ensure this.

While the existing code gives the correct answer for correct inputs,
if the producer HAS overrun into the reserved space, the result can
be a value larger than the maximum valid value (size-reserved). We
can improve this by reorganising the calculation, so that in the
event of overrun the result will be negative rather than over-large.

This means that the commonly-used test (available >= required)
will then reject further writes into the ring after an overrun,
giving some chance that we can recover from or at least diagnose
the original problem; whereas allowing more writes would likely both
confuse the h/w and destroy the evidence of what went wrong.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/dsi: add ports to intel_dsi to describe the ports being driven
Jani Nikula [Fri, 14 Nov 2014 14:54:22 +0000 (16:54 +0200)]
drm/i915/dsi: add ports to intel_dsi to describe the ports being driven

Later on this can include multiple ports (e.g. (1 << PORT_A) | (1 <<
PORT_C)) to describe dual link DSI.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/dsi: clean up MIPI DSI pipe vs. port usage
Jani Nikula [Fri, 14 Nov 2014 14:54:21 +0000 (16:54 +0200)]
drm/i915/dsi: clean up MIPI DSI pipe vs. port usage

MIPI DSI works on ports A and C, which map to pipes A and B,
respectively. Things are going to get more complicated with the
introduction of dual link DSI support, so clean up the register defines
and code to match reality.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Deal with video overlay on GPU reset
Ville Syrjälä [Wed, 26 Nov 2014 15:07:29 +0000 (17:07 +0200)]
drm/i915: Deal with video overlay on GPU reset

Clear the video overlay state on GPU reset. Any pending overlay request
in the ring has been nuked, and the display itself gets reset. So we
pretty much lose all state here. Adjust the software state to match so
that the next "putimage" will restore things to working order.

v2: Ass a locking check into intel_overlay_release_old_vid() (Daniel)

Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: s/0/NULL/ to appease sparse, reported by 0-day tester.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert 'trace_irq' to use requests rather than seqnos
John Harrison [Mon, 24 Nov 2014 18:49:39 +0000 (18:49 +0000)]
drm/i915: Convert 'trace_irq' to use requests rather than seqnos

Updated the trace_irq code to use requests instead of seqnos. This includes
reference counting the request object to ensure it sticks around when required.
Note that getting access to the reference counting functions means moving the
inline i915_trace_irq_get() function from intel_ringbuffer.h to i915_drv.h.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Resolve conflict due to shuffled merge order.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove redundant flip_work->flip_queued_ring
Daniel Vetter [Wed, 26 Nov 2014 13:39:48 +0000 (14:39 +0100)]
drm/i915: Remove redundant flip_work->flip_queued_ring

Similar to the patch from John which removed obj->ring.

Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Remove the now redundant 'obj->ring'
John Harrison [Mon, 24 Nov 2014 18:49:43 +0000 (18:49 +0000)]
drm/i915: Remove the now redundant 'obj->ring'

The ring member of the object structure was always updated with the
last_read_seqno member. Thus with the conversion to last_read_req, obj->ring is
now a direct copy of obj->last_read_req->ring. This makes it somewhat redundant
and potentially misleading (especially as there was no comment to explain its
purpose).

This checkin removes the redundant field. Many uses were simply testing for
non-null to see if the object is active on the GPU. Some of these have been
converted to check 'obj->active' instead. Others (where the last_read_req is
about to be used anyway) have been changed to check obj->last_read_req. The rest
simply pull the ring out from the request structure and proceed as before.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert 'i915_seqno_passed' calls into 'i915_gem_request_completed'
John Harrison [Mon, 24 Nov 2014 18:49:42 +0000 (18:49 +0000)]
drm/i915: Convert 'i915_seqno_passed' calls into 'i915_gem_request_completed'

Almost everywhere that caled i915_seqno_passed() was really asking 'has the
given seqno popped out of the hardware yet?'. Thus it had to query the current
hardware seqno and then do a signed delta comparison (which copes with wrapping
around zero but not with seqno values more than 2GB apart, although the latter
is unlikely!).

Now that the majority of seqno instances have been replaced with request
structures, it is possible to convert this test to be request based as well.
There is now a 'i915_gem_request_completed()' function which takes a request and
returns true or false as appropriate. Note that this currently just wraps up the
original _passed() test but a later patch in the series will reduce this to
simply returning a cached internal value, i.e.:
  _completed(req) { return req->completed; }'

This checkin converts almost all _seqno_passed() calls. The only one left is in
the semaphore code which still requires seqnos not request structures.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Drop hunk touching the trace_irq code since I've dropped the
patch which converts that, and resolve resulting conflict.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Connect requests to rings at creation not submission
John Harrison [Mon, 24 Nov 2014 18:49:41 +0000 (18:49 +0000)]
drm/i915: Connect requests to rings at creation not submission

It makes a lot more sense (and makes future seqno -> request conversion patches
simpler) to fill in the 'ring' field of the request structure at the point of
creation rather than submission. Given that the request structure is assigned by
ring specific code and thus is locked to a ring from the start, there really is
no reason to defer this assignment.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert 'ring_idle()' to use requests not seqnos
John Harrison [Mon, 24 Nov 2014 18:49:40 +0000 (18:49 +0000)]
drm/i915: Convert 'ring_idle()' to use requests not seqnos

More seqno value to request structure conversions. Note, this change temporarily
moves the 'get_seqno()' call inside ring_idle() but this will disappear again in
a later patch when i915_seqno_passed() itself is converted.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert trace functions from seqno to request
John Harrison [Mon, 24 Nov 2014 18:49:38 +0000 (18:49 +0000)]
drm/i915: Convert trace functions from seqno to request

All the code above is now using requests not seqnos so it is possible to convert
the trace functions across. Note that rather than get into problematic reference
counting issues, the trace code only saves the seqno and ring values from the
request structure not the structure pointer itself.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert 'flip_queued_seqno' into 'flip_queued_request'
John Harrison [Mon, 24 Nov 2014 18:49:37 +0000 (18:49 +0000)]
drm/i915: Convert 'flip_queued_seqno' into 'flip_queued_request'

Converted the flip_queued_seqno value to be a request structure as part of the
on going seqno to request changes. This includes reference counting the request
being saved away to ensure it can not be retired and freed while the flip code
is still waiting on it.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Again get rid of the _irq request unref by simply moving that
into the unpin worker. Doesn't matter when we hang onto the request
for a bit longer, and in the unpin worker we already grab the
dev->struct_mutex anyway.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove obsolete seqno parameter from 'i915_add_request'
John Harrison [Mon, 24 Nov 2014 18:49:36 +0000 (18:49 +0000)]
drm/i915: Remove obsolete seqno parameter from 'i915_add_request'

There is no longer any need to retrieve a seqno value from an i915_add_request()
call. The calling code already knows which request structure is being processed
(it can only be ring->OLR). And as the request itself is now used in preference
to the basic seqno value, the latter is now redundant in this situation.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert __wait_seqno() to __wait_request()
John Harrison [Mon, 24 Nov 2014 18:49:35 +0000 (18:49 +0000)]
drm/i915: Convert __wait_seqno() to __wait_request()

Now that all code above is using request structures instead of seqno values, it
is possible to convert  __wait_seqno() itself. Internally, it is still calling
i915_seqno_passed(), this will be updated later in the series. This step is just
changing the parameter list and function name.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert mmio_flip::seqno to struct request
John Harrison [Mon, 24 Nov 2014 18:49:34 +0000 (18:49 +0000)]
drm/i915: Convert mmio_flip::seqno to struct request

Converted the mmio_flip 'seqno' value to be a request structure as part of the
on going seqno to request changes. This includes reference counting the request
being saved away to ensure it can not be retired and freed while the flip code
is still waiting on it.

v2: Used the IRQ friendly request dereference call in the notify handler as that
code is called asynchronously without holding any useful mutex locks.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Drop the _irq variant and use the normal reques unref,
wrapped in dev->struct_mutex per the discussion on the m-l.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Check locking in i915_gem_request_unreference
Daniel Vetter [Wed, 26 Nov 2014 09:26:05 +0000 (10:26 +0100)]
drm/i915: Check locking in i915_gem_request_unreference

With refcounting it looks like you can just drop that refcount, but
that's not really the case. So make sure no one forgets.

Motivated by the unlocked call in the mmio flip code.

Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Convert i915_wait_seqno to i915_wait_request
Daniel Vetter [Wed, 26 Nov 2014 13:17:05 +0000 (14:17 +0100)]
drm/i915: Convert i915_wait_seqno to i915_wait_request

Updated i915_wait_seqno() to take a request structure instead of a seqno value
and renamed it accordingly. Internally, it just pulls the seqno out of the
request and calls on to __wait_seqno() as before. However, all the code further
up the stack is now simplified as it can just pass the request object straight
through without having to peek inside.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Squash in hunk from an earlier patch which was rebased
wrongly.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert 'last_flip_req' to be a request not a seqno
John Harrison [Mon, 24 Nov 2014 18:49:31 +0000 (18:49 +0000)]
drm/i915: Convert 'last_flip_req' to be a request not a seqno

Converted 'last_flip_req' to be an actual request rather than a seqno value as
part of the on going seqno to request changes. This includes reference counting
the request being saved away to ensure it can not be retired and freed while the
overlay code is still waiting on it.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Make 'i915_gem_check_olr' actually check by request not seqno
John Harrison [Mon, 24 Nov 2014 18:49:30 +0000 (18:49 +0000)]
drm/i915: Make 'i915_gem_check_olr' actually check by request not seqno

Updated the _check_olr() function to actually take a request object and compare
it to the OLR rather than extracting seqnos and comparing those.

Note that there is one use case where the request object being processed is no
longer available at that point in the call stack. Hence a temporary copy of the
original function is still present (but called _check_ols() instead). This will
be removed in a subsequent patch.

Also, downgraded a BUG_ON to a WARN_ON as apparently the former is frowned upon
for shipping code.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove 'outstanding_lazy_seqno'
John Harrison [Mon, 24 Nov 2014 18:49:29 +0000 (18:49 +0000)]
drm/i915: Remove 'outstanding_lazy_seqno'

The OLS value is now obsolete. Exactly the same value is guarateed to be always
available as PLR->seqno. Thus it is safe to remove the OLS completely. And also
to rename the PLR to OLR to keep the 'outstanding lazy ...' naming convention
valid.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Ensure requests stick around during waits
John Harrison [Mon, 24 Nov 2014 18:49:28 +0000 (18:49 +0000)]
drm/i915: Ensure requests stick around during waits

Added reference counting of the request structure around __wait_seqno() calls.
This is a precursor to updating the wait code itself to take the request rather
than a seqno. At that point, it would be a Bad Idea for a request object to be
retired and freed while the wait code is still using it.

v3:

Note that even though the mutex lock is held during a call to i915_wait_seqno(),
it is still necessary to explicitly bump the reference count. It appears that
the shrinker can asynchronously retire items even though the mutex is locked.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Remove wrongly squashed hunk which breaks the build.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert i915_gem_ring_throttle to use requests
John Harrison [Mon, 24 Nov 2014 18:49:27 +0000 (18:49 +0000)]
drm/i915: Convert i915_gem_ring_throttle to use requests

Convert the throttle code to use the request structure rather than extracting a
ring/seqno pair from it and using those. This is in preparation for
__wait_seqno() becoming __wait_request().

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Replace last_[rwf]_seqno with last_[rwf]_req
John Harrison [Mon, 24 Nov 2014 18:49:26 +0000 (18:49 +0000)]
drm/i915: Replace last_[rwf]_seqno with last_[rwf]_req

The object structure contains the last read, write and fenced seqno values for
use in syncrhonisation operations. These have now been replaced with their
request structure counterparts.

Note that to ensure that objects do not end up with dangling pointers, the
assignments of last_*_req include reference count updates. Thus a request cannot
be freed if an object is still hanging on to it for any reason.

v2: Corrected 'last_rendering_' to 'last_read_' in a number of comments that did
not get updated when 'last_rendering_seqno' became 'last_read|write_seqno'
several millenia ago.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add helper functions to aid seqno -> request transition
John Harrison [Mon, 24 Nov 2014 18:49:25 +0000 (18:49 +0000)]
drm/i915: Add helper functions to aid seqno -> request transition

Added helper functions for retrieving the ring and seqno entries from a request
structure. This allows the internal workings of the request structure to be
hidden from code that is using these. It also allows for useful
workarounds/debug code to be added as or when necessary.

Note that it is intended that the majority (if not all) uses of the seqno
accessor will disappear eventually as code is updated to use the request
structure itself rather than working with seqno values.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add reference count to request structure
John Harrison [Mon, 24 Nov 2014 18:49:24 +0000 (18:49 +0000)]
drm/i915: Add reference count to request structure

The plan is to use request structures everywhere that seqno values were
previously used. This means saving pointers to structures in places that used to
be simple integers. In turn, that means that the target structure now needs much
more stringent lifetime tracking. That is, it must not be freed while some other
random object still holds a pointer to it.

To achieve this tracking, a reference count needs to be added. Whenever a
pointer to the structure is saved away, the count must be incremented and the
free must only occur when all references have been released.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Ensure OLS & PLR are always in sync
John Harrison [Mon, 24 Nov 2014 18:49:23 +0000 (18:49 +0000)]
drm/i915: Ensure OLS & PLR are always in sync

The aim is to replace seqno values with request structures. A step along the way
is to switch to using the PLR in preference to the OLS. That requires the PLR to
only be valid when and only when the OLS is also valid. I.e., the two must be
kept in lock step. Then, code which was using the OLS can be safely switched
over to using the PLR instead.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix short description of intel_display_power_is_enabled()
Damien Lespiau [Tue, 25 Nov 2014 13:45:41 +0000 (13:45 +0000)]
drm/i915: Fix short description of intel_display_power_is_enabled()

That's the version actually taking the dev_priv->power_domains lock.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Assert that we successfully downclock the GPU before suspend
Chris Wilson [Tue, 25 Nov 2014 11:56:33 +0000 (11:56 +0000)]
drm/i915: Assert that we successfully downclock the GPU before suspend

Before suspending, we wait upon the outstanding GPU requests and flush
our pending idle handlers. This should downclock the GPU to its lowest
power state. Add a WARN to check that the delayed tasks were run and did
their job properly.

Suggested-by: Akash Goel <akash.goel@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove user pinning code
Daniel Vetter [Mon, 24 Nov 2014 10:21:52 +0000 (11:21 +0100)]
drm/i915: Remove user pinning code

Now unused.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Don't read 'HEAD' MMIO register in LRC mode
Dave Gordon [Tue, 18 Nov 2014 20:07:21 +0000 (20:07 +0000)]
drm/i915: Don't read 'HEAD' MMIO register in LRC mode

The logical ring code was updating the software ring 'head' value
by reading the hardware 'HEAD' register. In LRC mode, this is not
valid as the hardware is not necessarily executing the same context
that is being processed by the software. Thus reading the h/w HEAD
could put an unrelated (undefined, effectively random) value into
the s/w 'head' -- A Bad Thing for the free space calculations.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Check for matching ringbuffer in logical_ring_wait_request()
Dave Gordon [Tue, 18 Nov 2014 20:07:20 +0000 (20:07 +0000)]
drm/i915: Check for matching ringbuffer in logical_ring_wait_request()

The request queue is per-engine, and may therefore contain requests
from several different contexts/ringbuffers. In determining which
request to wait for, this function should only consider requests
from the ringbuffer that it's checking for space, and ignore any
that it finds that belong to other contexts.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Enable PSR for Baytrail and Braswell.
Rodrigo Vivi [Thu, 20 Nov 2014 11:44:37 +0000 (03:44 -0800)]
drm/i915: Enable PSR for Baytrail and Braswell.

This patch is the last in series of VLV/CHV PSR,
that finally enable PSR by adding it to HAS_PSR
and calling the proper enable and disable
functions on the right places.

Although it is still disabled by default.

v2: Rebase over intel_psr and merge Durgadoss's fixes.
v3: Fix typo.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>