We don't actually need to write the HDMI entry on DDIs that have no
chance to be used as HDMI ports.

While this patch shouldn't change the current behaviour, it makes
further enabling work easier as we'll have an eDP table filling the full
10 entries.

v2: Rely on the logic from intel_ddi_init() to figure out if the DDI port
    supports HDMI or not (Paulo).
Suggested-by: NSatheeshakrishna M <satheeshakrishna.m@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NSivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Not every DDIs is necessarily connected can be strapped off and, in the
future, we'll have platforms with a different number of default DDI
ports. So, let's only call intel_prepare_ddi_buffers() on DDI ports that
are actually detected.

We also use the opportunity to give a struct intel_digital_port to
intel_prepare_ddi_buffers() as we'll need it in a following patch to
query if the port supports HMDI or not.

On my HSW machine this removes the initialization of a couple of
(unused) DDIs.
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NSivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The checks for PLL enabled state on CPU ports are valid only on GMCH
platforms but atm we'd also call them on non-PCH-split/non-GMCH
platforms like BXT, triggering false warnings. Until the proper check is
implented for these platforms simply disable the check.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Add placeholder function for calculating programmed pixel clock.
Note: Formula to back calculate link clock from dividers not
available currently.

v2:
- rebased on upstream s/crtc_config/crtc_state/ change (imre)

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Determine PLL attached to pipe (which is same as DDI PLL)

v2:
- rebased on upstream s/crtc_config/crtc_state/ (imre)

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Assign PLL for pipe (dependent on port attached to the pipe)

v2:
- fix incorrect encoder vs. new_encoder check for crtc (imre)

v3:
- warn and return error if no encoder is attached (imre)

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v2)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Don't move intel_ddi_get_crtc_new_encoder around.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Calculate and cache clock parameters. Follow bspec algorithm for HDMI.
Use precalculated values for DisplayPort linkrates.

v2: (imre)
- rebase against upstream crtc_state change
- use the existing CHV based helper instead of handrolling the same

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Plug bxt PLL code into existing shared DPLL framework.

v2: (imre)
- squash in Satheeshakrishna's "Define BXT clock registers" and
  "Add state variables for bxt clock registers" patches
- squash in Vandanas's "Change grp access to lane access for PLL"
- fix group vs. lane access in bxt_ddi_pll_get_hw_state
- add code comment why we read from lane registers while writing to
  group registers
- clean up register macros
- use BXT_PORT_PLL_* macros instead of open-coding the same
- check if BXT_PORT_PCS_DW12_LN01 matches BXT_PORT_PCS_DW12_LN23
  during hardware state readout
- add missing LANESTAGGER_STRAP_OVRD masking
- add note about missing step according to the latest BUN for
  PORT_PLL_9/lockthresh

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Broxton has the same panel fitter registers as Skylake.

v2:
- add MISSING_CASE for future platforms (daniel)
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NSagar Kamble <sagar.a.kamble@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

PORT_CLK_SEL programming is needed only on HSW/BDW.

v2:
- don't program PORT_CLK_SEL from mst encoders either (imre)
v3:
- fix the check for GEN9+ in intel_mst_pre_enable_dp() (damien)
Signed-off-by: NSatheeshakrishna M <satheeshakrishna.m@intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NSagar Kamble <sagar.a.kamble@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Same as IBX and G4x, they all share the same genetic material.

v2: we all need a bit more port in our lives
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Since the pin_ioctl is defunct, we only care about whether an object is
pinned into the display for debug purposes.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Since the removal of the user pin_ioctl, the only means for pinning an
object is either through binding to the scanout or during execbuf
reservation. As the later prevents a call to set-tiling, we need only
check if the obj is pinned into the display plane to see if we need
reject the set-tiling ioctl.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The HDMI translation table is added back to bspec, so adding it,
and defaulting the 800mV+0dB entry.

The HDMI translation table was removed by following commit as per HW team's
recommendation:
commit 7ff44670 ("drm/i915/skl: Only use the 800mV+2bB HDMI translation entry")

v2: Adding reference to commit which removed this table (Jani)

Cc: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NSonika Jindal <sonika.jindal@intel.com>
Reviewed-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This is a separate patch to simplify conflict handling with other
ongoing atomic work.
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Reviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Since universal planes the primary plane might not be around, and it's
kinda silly to restrict the pipe bpp to the primary plane if we might
end up displaying a 10bpc video overlay. And with atomic we might very
well enable a pipe without a primary plane. So just use the platform
max as a starting point and then restrict appropriately.

Of course this is all still a bit moot as long as we artificially
compress everything to max 8bpc because we don't use the hi-bpc gamma
tables.
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Reviewed-by: NAnder Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

One month passed between posting a patch and it getting merged, and
unfortunately even though it still applies, it needs fixing to account
for changes in function parameters since:

   commit d385612e15b8b6eb3db328d83f1872ef8a381788
   Author: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
   Date:   Tue Mar 17 14:45:29 2015 +0000

       drm/i915: Log view type when printing warnings
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
[danvet: Squash in fixup from Tvrtko to fix the rebase conflict.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Add triggers for DC9 as per details provided in bxt_enable_dc9
and bxt_disable_dc9 implementations.

v1:
- Add SKL check in gen9_disable_dc5 as it is possible for DC5
  to remain disabled only for SKL.
- Add additional checks for whether DC5 is already disabled during
  DC5-disabling only for BXT.

v2:
- rebase to latest.
- Load CSR during DC9 disabling in the beginning before DC9 is
  disabled.
- Make gen9_disable_dc5 function non-static as it's being called by
  functions in i915_drv.c.
- Enable DC9-related functionality using a macro.

v3: (imre)
- remove BXT_ENABLE_DC9, we want DC9 always, and it's only valid on BXT
- remove DC5 disabling and CSR FW loaded check, these are nop atm
- squash in Vandana's "Do ddi_phy_init always" patch

v4:
- add TODO to re-enable DC5 during resume if CSR FW is available (sagar)
Signed-off-by: NSuketu Shah <suketu.j.shah@intel.com>
Signed-off-by: A.Sunil Kamath <sunil.kamath@intel.com> (v2)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NSagar Kamble <sagar.a.kamble@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

v2: Modified as per review comments from Imre
- Mention enabling instead of allowing in the debug trace and
  remove unnecessary comments.

v3:
- Rebase to latest.
- Move DC9-related functions from intel_display.c to intel_runtime_pm.c.

v4: (imre)
- remove DC5 disabling, it's a nop at this point
- squashed in Suketu's "Assert the requirements to enter or exit DC9"
  patch
- remove check for RUNTIME_PM from assert_can_enable_dc9, it's not a
  dependency

Signed-off-by: A.Sunil Kamath <sunil.kamath@intel.com> (v3)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NSagar Kamble <sagar.a.kamble@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Extend the VLV/CHV DPIO (PHY) documentation with the BXT specifics.

v2:
- add more detail about the mapping between ports and transcoders (ville)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Add PHY specific display initialization sequence as per BSpec.

Note that the PHY initialization/uninitialization are done
at their current place only for simplicity, in a future patch - when more
of the runtime PM features will be enabled - these will be moved to
power well#1 and modeset encoder enabling/disabling hooks respectively.

The call to uninitialize the PHY during system/runtime suspend will be
added later in this patchset.

v1: Added function definitions in header files
v2: Imre's review comments addressed
- Moved CDCLK related definitions to i915_reg.h
- Removed defintions for CDCLK frequency
- Split uninit_cdclk() by adding a phy_uninit function
- Calculate freq and decimal based on input frequency
- Program SSA precharge based on input frequency
- Use wait_for 1ms instead 200us udelay for DE PLL locking
- Removed initial value for divider, freq, decimal, ratio.
- Replaced polling loops with wait_for
- Parameterized latency optim setting
- Fix the parts where DE PLL has to be disabled.
- Call CDCLK selection from mode set

v3: (imre)
- add note about the plan to move the cdclk/phy init to a better place
- take rps.hw_lock around pcode access
- fix DDI PHY timeout value
- squash in Vandana's "PORT_CL2CM_DW6_A BUN fix",
  "DDI PHY programming register defn", "Do ddi_phy_init always",
- move PHY register macros next to the corresponding CHV/VLV macros
- move DE PLL register macros here from another patch since they are
  used here first
- add BXT_ prefix to CDCLK flags
- s/COMMON_RESET/COMMON_RESET_DIS/ and clarify related code comments
- fix incorrect read value for the RMW of BXT_PHY_CTL_FAMILY_DDI
- fix using GT_DISPLAY_EDP_POWER_ON vs. GT_DISPLAY_DDI_POWER_ON
  when powering on DDI ports
- fix incorrect port when setting BXT_PORT_TX_DW14_LN for DDI ports
- add missing masking when programming CDCLK_FREQ_DECIMAL
- add missing powering on for DDI-C port, rename OCL2_LDOFUSE_PWR_EN
  to OCL2_LDOFUSE_PWR_DIS to reduce confusion
- add note about mismatch with bspec in the PORT_REF_DW6 fields
- factor out PHY init code to a new function, so we can call it for
  PHY1 and PHY0, instead of open-coding the same

v4: (ville)
- split the CDCLK/PHY parts into two patches, update commit message
  accordingly
- use the existing dpio_phy enum instead of adding a new one for the
  same purpose
- flip the meaning of PHYs so that PHY_A is PHY1 and PHY_BC is PHY0 to
  better match CHV
- s/BXT_PHY/_BXT_PHY/
- use _PIPE for _BXT_PHY instead of open-coding it
- drop _0_2_0_GTTMMADR suffix from BXT_P_CR_GT_DISP_PWRON
- define GT_DISPLAY_POWER_ON in a more standard way
- make a note that the CHV ConfigDB also disagrees about GRC_CODE field
  definitions
- fix lane optimization refactoring fumble from v3
- add per PHY uninit functions to match the init counterparts

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com> (v2)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Add CDCLK specific display clock initialization sequence as per BSpec.

Note that the CDCLK initialization/uninitialization are done at their
current place only for simplicity, in a future patch - when more of the
runtime PM features will be enabled - these will be moved to power
well#1 and modeset encoder enabling/disabling hooks respectively. This
also means that atm dynamic power gating power well #1 is effectively
disabled.

The call to uninitialize CDCLK during system/runtime suspend will be
added later in this patchset.

v1: Added function definitions in header files
v2: Imre's review comments addressed
- Moved CDCLK related definitions to i915_reg.h
- Removed defintions for CDCLK frequency
- Split uninit_cdclk() by adding a phy_uninit function
- Calculate freq and decimal based on input frequency
- Program SSA precharge based on input frequency
- Use wait_for 1ms instead 200us udelay for DE PLL locking
- Removed initial value for divider, freq, decimal, ratio.
- Replaced polling loops with wait_for
- Parameterized latency optim setting
- Fix the parts where DE PLL has to be disabled.
- Call CDCLK selection from mode set

v3: (imre)
- add note about the plan to move the cdclk/phy init to a better place
- take rps.hw_lock around pcode access
- move DE PLL register macros here from another patch since they are
  used here first
- add BXT_ prefix to CDCLK flags
- add missing masking when programming CDCLK_FREQ_DECIMAL

v4: (ville)
- split the CDCLK/PHY parts into two patches, update commit message
  accordingly
- s/DISPLAY_PCU_CONTROL/HSW_PCODE_DE_WRITE_FREQ_REQ/
- simplify BXT_DE_PLL_RATIO macros
- fix BXT_DE_PLL_RATIO_MASK
- s/bxt_select_cdclk_freq/broxton_set_cdclk_freq/
- move cdclk init/uninit/set code from intel_ddi.c to intel_display.c
- remove redundant code comments for broxton_set_cdclk_freq()
- sanitize fixed point<->integer frequency value conversion
- use DRM_ERROR instead of WARN
- do RMW when programming BXT_DE_PLL_CTL for safety
- add note about PLL lock timeout being exactly 200us
- make PCU error messages more descriptive
- instead of using 0 freq to mean PLL off/bypass freq use 19200
  for clarity, as the latter one is the actual rate
- simplify pcode programming, removing duplicated
  sandybridge_pcode_write() call
- sanitize code flow, remove unnecessary scratch vars in
  broxton_set_cdclk() (imre)
- Remove bound check for maxmimum freq to match current code.
  This check will be added later at a more proper platform
  independent place once atomic support lands.
- add note to remove freq guard band which isn't needed on BXT
- add note to reduce freq to minimum if no pipe is enabled
- combine broxton_modeset_global_pipes() with
  valleyview_modeset_global_pipes()

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com> (v2)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Rename vlv_cdclk_freq to cdclk_freq so that it can be used for all
platforms as required. Needed by the next patch.
Signed-off-by: NVandana Kannan <vandana.kannan@intel.com>
Signed-off-by: NA.Sunil Kamath <sunil.kamath@intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

According to spec: "In PSR HW or SW mode, SW set this bit before writing
registers for a flip. It will be self-clear when it gets to the PSR
active state."

Some versions of spec mention that this is needed when in
"Persistent mode" but define it as same as "SW mode". Since this
fix the page flip case let's assume this is exactly what we need.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

On Haswell and Broadwell with link in standby when exit event happens
between vblank and VSC packet, PSR exit on panel but DPA transmitter
still sends black pixel. When this condition hits, panel will intermittently
display black frame.

The known W/A for this case involve the of single_frame update
that isn't supported on Haswell and to be supported on Broadwell
3 other workarounds would be required. So it is better and safe to
just deprecate link_standby for now.

Also, link fully off saves more power than link_standby and afwk
no OEM is requesting link standby on VBT. There is no reason for that.

For Skylake let's just consider it behaves like Broadwell until
we prove otherwise.

v2: Fix commit message (Durga).

v3: Fix conflict with PSR2.

Reference: HSD: bdwgfx/1912559
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Since the beginning there is a missunderstanding on the meaning of this
dpcd bit.
This bit shouldn't indicate whether to use link standby or not, but just
be used to configure TP1, TP2 and TP3 times and tell hw aux should be skiped
since HW is the responsible one.

Even with help of frontbuffer tracking, HW is still fully responsible for
PSR exit logic with/without DP training.

DP_PSR_NO_TRAIN_ON_EXIT means the source doesn't need to do the training, but
it doesn't tell to avoid TP patterns, so we will send minimal TP1 and avoid
TP2. It also means that sink itself can take up to 5 idle frames for training.
6 in our case since we might be off by 1. So we also increment idle_frames by 4
here.

v2: Fix and improve commit message (Durga).
v3: Use minimal TP1 time avoiding TP2 and increase idle frame.

Cc: Durgadoss R <durgadoss.r@intel.com>
Cc: Arthur Runyan <arthur.j.runyan@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This wrong logic and useless define came from first versions and
came along with all rework. Just now I notice how ugly, wrong and
useless this is.

val is already defined as 0 anyway and logic is completelly wrong
and useless. So let's starting the link_standby fix with this
cleaning.
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Add BXT power domains

v2: Use DOMAIN_PLLS instead of a new CDCLK one, whitespace fixes
    (Damien)
v3: add VGA, TRANSCODER_A power domains (imre)

Signed-off-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v1)
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

GMBUS interrupt has been moved to CPU side in BXT.
What this patch does is:
1. Enable GMBUS IRQ in de_post_install function
2. Handle this interrupt as a port interrupt in display irq
   handler

v2: Rebase on top of the for_each_pipe() change adding dev_priv as
    first argument (Damien).
v3: read BXT_DE_PORT_GMBUS IIR flag only on BXT on other platforms
    it's reserved (imre)
v4: (jani)
- remove redundant 'BXT GMBUS' comment
- fix formatting of BXT_DE_PORT_GMBUS definition
Reviewed-by: NSatheeshakrishna M <satheeshakrishna.m@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This patch adds conditional checks in gen8_irq functions
to support BXT. Most of the checks just look for PCH split
availability, and block the call to PCH interrupt functions if
not available.

v2: (jani)
- drop redundant TODO comment about PCH IRQ flags on BXT
- check HAS_PCH_SPLIT instead of IS_BROXTON when handling PCH specific
  IRQ events in gen8_irq_handler()
- check HAS_PCH_SPLIT before calling the function instead of a
  corresponding early return within the called function for
  ibx_irq_reset(), ibx_irq_pre_postinstall(), ibx_irq_postinstall()
v3: (jani)
- in ironlake_irq_postinstall() and ironlake_irq_reset() HAS_PCH_SPLIT
  is always true, so drop the check for it
Reviewed-by: NSatheeshakrishna M <satheeshakrishna.m@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Shashank Sharma <ppashank.sharma@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This patch adds a hot plug interrupt handler function for BXT.
What this function typically does is:
1. Check if hot plug is enabled from hot plug control register.
2. Call hpd_irq_handler with appropriate trigger to detect a
   plug storm and schedule a bottom half.
3. Clear sticky status bits in hot plug control register..

v2: (jani)
- drop redundant unlikely()
- s/Todo/FIXME:/ in code comment
- declare 'found' var in the scope where it's used
- check for IS_BROXTON before handling BXT_DE_PORT_HOTPLUG_MASK
Reviewed-by: NSatheeshakrishna M <satheeshakrishna.m@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

All non-GMCH platforms have the same register layout for HPD long/short
status, so let's use this condition instead of HAS_PCH_SPLIT, as the
latter doesn't apply for BXT.

Noticed by Daniel.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

In BXT, DDI hotplug control has been moved to CPU from PCH.
This patch adds a new IRQ setup function for BXT which:
1. Checks which HPD ports are requested to be enabled by encoders.
2. Enables those ports in the hot plug control register.
3. Un-masks these port interrupts in the IMR register.
4. Enables these port interrupts in the IER register.

V3: Kept the default HPD filter count to default (500 us) as per
    satheesh's comment
v4: Remove unused HPD filter defines (Damien)
v5: warn if trying to setup HPD on port A (imre)
v6: fix order of definitions for register bitfields (Daniel)
v7: (jani)
- define the size of the hpd_bxt array explicitly for bound checking
- use for_each_intel_encoder instead of open coding it
- fix format/order of definitions for BXT_HOTPLUG_CTL reg bitfields
Reviewed-by: NSatheeshakrishna M <satheeshakrishna.m@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> (v4)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

For BXT gmbus is pulled from PCH to CPU. From implementation point of
view only pin pair configuration will change. The existing
implementation supports all platforms previous to GEN8 and also SKL. But
for BXT pin pair configuration is completely different than SKL or other
previous GEN's. This patch introduces the new pin pair configuration
structure specific to BXT and also ensures every real gmbus port has a
gpio pin.

v3 by Jani: with the platform independent prep work in place, the bxt
enabling reduces to a fairly trivial patch. Credits are due Sunil for
giving me the ideas (with his patches) what the platform independent
parts should look like.

v4: Fix intel_hdmi_init_connector() for bxt. Abstract gmbus_pin access
more. s/GPU/PCH/ in commit message.

v5: Rebase.

Issue: VIZ-3574
Signed-off-by: NA.Sunil Kamath <sunil.kamath@intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Separate topic branch for bxt didn't work out since we needed to
refactor the gmbus code a bit to make it look decent. So backmerge.
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>

The port detection register flags in SFUSE_STRAP and DDI_BUF_CTL_A are
not defined for BXT, so don't use them.

Suggested by Satheesh.

v2:
- DDI_BUF_CTL_A bit 0 is not useful on BXT. Making changes to use this
  bit when simulator or BXT is not applicable. Code re-arranged as per
  Damien's suggestion.

v3:
- clarify commit message, add code comment (imre)

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com> (v2)
Cc: M, Satheeshakrishna <satheeshakrishna.m@intel.com>
Cc: Lespiau, Damien <damien.lespiau@intel.com>
Cc: Shankar, Uma <uma.shankar@intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Set TLBPF in TILECTL. This fixes an issue with BXT HW seeing
corrupted pte entries.

v2:
- move the workaround to bxt_init_clock_gating (imre)

Signed-off-by: Robert Beckett <robert.beckett@intel.com> (v1)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NNick Hoath <nicholas.hoath@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NNick Hoath <nicholas.hoath@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NNick Hoath <nicholas.hoath@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>