This patch adds initialization code for lspcon.
What we are doing here is:
	- Check if lspcon is configured in VBT for this port
	- If lspcon is configured, initialize it and configure it
          as DP port.

V2: Addressed Ville's review comments:
- Not adding AVI IF functions for LSPCON display now.
  This part will be added once the dig_port level AVI-IF series
  gets merged.

V3: Rebase
V4: Rebase
V5: Rebase
V6: Rebase
Signed-off-by: NShashank Sharma <shashank.sharma@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-5-git-send-email-shashank.sharma@intel.com

Saves 1392 bytes of .rodata strings.

Also change a few function/macro prototypes in i915_gem_gtt.c
from dev to dev_priv where it made more sense to do so.

v2: Add parantheses around dev_priv. (Ville Syrjala)
v3: Mention function prototype changes. (David Weinehall)
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: David Weinehall <david.weinehall@linux.intel.com>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: NJani Nikula <jani.nikula@linux.intel.com>
Acked-by: NChris Wilson <chris@chris-wilson.co.uk>
Acked-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>

Saves 1320 bytes of .rodata strings.

v2: Add parantheses around dev_priv. (Ville Syrjala)
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: NJani Nikula <jani.nikula@linux.intel.com>
Acked-by: NChris Wilson <chris@chris-wilson.co.uk>
Acked-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>

Saves 2432 bytes of .rodata strings.

v2: Add parantheses around dev_priv. (Ville Syrjala)
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: NJani Nikula <jani.nikula@linux.intel.com>
Acked-by: NChris Wilson <chris@chris-wilson.co.uk>
Acked-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>

This reverts 'commit 3708d5e0 ("drm/i915: start adding dp mst audio")'
because it breaks MST multi-monitor setups on some platforms.

Fixes: 3708d5e0 ("drm/i915: start adding dp mst audio")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97907Signed-off-by: NDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reported-by: NKim Lidström <kim@dxtr.im>
Cc: Libin Yang <libin.yang@linux.intel.com>
Cc: Lyude <cpaul@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1475132104-2754-1-git-send-email-dhinakaran.pandiyan@intel.com

(This patch is developed by Dave Airlie <airlied@redhat.com> originally)

This patch adds support for DP MST audio in i915.

Enable audio codec when DP MST is enabled if has_audio flag is set.
Disable audio codec when DP MST is disabled if has_audio flag is set.

Another separated patches to support DP MST audio will be implemented
in audio driver.

v2:
Rebased.
Signed-off-by: NLibin Yang <libin.yang@linux.intel.com>
Signed-off-by: NDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: NLyude <cpaul@redhat.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1474334681-22690-6-git-send-email-dhinakaran.pandiyan@intel.com

Storing the port enum in intel_encoder makes it convenient to know the
port attached to an encoder. Moving the port information up from
intel_digital_port to intel_encoder avoids unecessary intel_digital_port
access and handles MST encoders cleanly without requiring conditional
checks for them (thanks danvet).

v2:
Renamed the port enum member from 'attached_port' to 'port' (danvet)
Fixed missing initialization of port in intel_sdvo.c (danvet)

v3:
Fixed missing initialization of port in intel_crt.c (Ville)

v4:
Storing port for DVO encoders too.
Signed-off-by: NDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NLyude <cpaul@redhat.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1474334681-22690-3-git-send-email-dhinakaran.pandiyan@intel.com

This adds support for KBL in the new function added in commit ID:
commit <f169660e> that returns a
shared pll in case of DDI platforms.
Signed-off-by: NManasi Navare <manasi.d.navare@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1473728663-14355-1-git-send-email-manasi.d.navare@intel.com

Add the PLL selection code for HSW/BDW/BXT/SKL into a stand-alone function
in order to allow for the implementation of a platform neutral upfront
link training function.

v4:
* Removed dereferencing NULL pointer in  case of failure (Dhinakaran Pandiyan)
v3:
* Add Hooks for all DDI platforms into this standalone function

v2:
* Change the macro to use dev_priv instead of dev (David Weinehall)
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NManasi Navare <manasi.d.navare@intel.com>
Signed-off-by: NJim Bride <jim.bride@linux.intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>

Split intel_ddi_pre_enable() into encoder type specific versions that
don't depend on crtc_state. The necessary parameters are passed as
function arguments. This split will be necessary for implementing DP
upfront link training.

v3:
* Rebased onto latest kernel (Manasi)
v2:
* Rebased onto kernel v4.7 (Jim)
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: NJim Bride <jim.bride@linux.intel.com>
Signed-off-by: NManasi Navare <manasi.d.navare@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>

The value of ddi_pll_sel is derived from the selection of shared dpll,
so just calculate the final value when necessary.

v2: Actually remove it from crtc state and delete remaining usages. (CI)
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>

Decouple intel_dp_set_link_params() from struct intel_crtc_state. This
will be useful for implementing DP upfront link training.

v2:
* Rebased on atomic state changes (Manasi)
Reviewed-by: NDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: NAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: NManasi Navare <manasi.d.navare@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>

Instead of iterating overthe connectors manually, run the last part of
DDI disabling inside the crt post disable function.

This was meant to be addressed before submitting the other commit,
but I missed the review comments.

Fixes: fd6bbda9 ("drm/i915: Pass crtc_state and connector_state to encoder functions")
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1471961888-10771-2-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
[mlankhorst: Fix extra whitespace between functions.]

Slightly less straightforward. Some of the drrs calls are done from
workers or from intel_ddi.c, pass along crtc_state when we can,
or crtc->config when we can't.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470755054-32699-15-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Some places iterate over connector_state to find the right
connector, pass it along as argument.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470755054-32699-7-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This is mostly code churn, with exception of a few places:
- intel_display.c has changes in intel_sanitize_encoder
- intel_ddi.c has intel_ddi_fdi_disable calling intel_ddi_post_disable,
  and required a function change. Also affects intel_display.c
- intel_dp_mst.c passes a NULL crtc_state and conn_state to
  intel_ddi_post_disable for shutting down the real encoder.

  If we would pass conn_state, then conn_state->connector !=
  intel_dig_port->connector and conn_state->best_encoder !=
  to_intel_encoder(intel_dig_port).

  We also shouldn't pass crtc_state, because in that case the
  disabling sequence may potentially be different depending on
  which crtc is disabled last. Nice way to introduce bugs.

No other functional changes are done, diff stat is already huge.
Each encoder type will need to be fixed to use the atomic states
separately.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470755054-32699-6-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The spec was recently fixed to have the correct iboost setting for the
SKL Y/U DP DDI buffer translation table entry 2. Update our tables
to match.

Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470140517-13011-1-git-send-email-ville.syrjala@linux.intel.com
Cc: stable@vger.kernel.org
Reviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>
(cherry picked from commit 5ac90567)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

Currently we fail to program the iboost stuff for HDMI/DVI. Let's remedy
that.

Cc: stable@vger.kernel.org
Fixes: f8896f5d ("drm/i915/skl: Buffer translation improvements")
Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-4-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>
(cherry picked from commit 8d8bb85e)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

Bspec says:
"For DDIA with x4 capability (DDI_BUF_CTL DDIA Lane Capability Control =
 DDIA x4), the I_boost value has to be programmed in both
 tx_blnclegsctl_0 and tx_blnclegsctl_4."

Currently we only program tx_blnclegsctl_0. Let's do the other one as
well.

Cc: stable@vger.kernel.org
Fixes: f8896f5d ("drm/i915/skl: Buffer translation improvements")
Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-2-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>
(cherry picked from commit a7d8dbc0)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

This reverts commit f64425a8.

active_streams will get totally out of whack with SST unless we
sync up with the hw state at readout, obviously! We don't yet
do that, so now the WARNs fire all the time. Let's revert :(
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470413142-26402-1-git-send-email-ville.syrjala@linux.intel.com
References: https://bugs.freedesktop.org/show_bug.cgi?id=95472#c14Acked-by: NChris Wilson <chris@chris-wilson.co.uk>

The spec was recently fixed to have the correct iboost setting for the
SKL Y/U DP DDI buffer translation table entry 2. Update our tables
to match.

Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470140517-13011-1-git-send-email-ville.syrjala@linux.intel.com
Cc: stable@vger.kernel.org
Reviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>

s/active_mst_links/active_streams/ and use it also for SST. We can then
use this information in the hpd handling to see if the link is active
or not, and thus whether we may need to retrain.

Cc: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Cc: Manasi D Navare <manasi.d.navare@intel.com>
Cc: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469717448-4297-6-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The MST vs. SST selection should depend purely on the choice of the
connector/encoder. So don't try to determine the correct DDI mode
based on the intel_dp->is_mst, which simply tells us whether the sink
is in MST mode or not. Instead derive the information from the encoder
type. Since the link training code deals in non-fake encoders, we'll
also need to keep a second copy of that information around, which we'll
now designate as 'link_mst'.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469717448-4297-4-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Make the BDW and SKL code a bit more similar by extracting the
low vswing handling for BDW into a helper, as we already have
it like that for SKL+.

Cc: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-10-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NImre Deak <imre.deak@intel.com>

We no longer have any need to look up the intel_digital_port based
on the passed in intel_encoder, but we still want to look up the port.
Let's just move that logic into intel_ddi_get_encoder_port() and drop
the dig_port stuff.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-9-git-send-email-ville.syrjala@linux.intel.com

Program the 'iboost_bit' based on what the VBT says it should be for
the specific port type, rather than assume it's always the same
for DP and HDMI.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-8-git-send-email-ville.syrjala@linux.intel.com

DDI buffer prorgramming works quite differently depending on
the mode of the DDI port (DP/eDP/FDI vs. HDMI/DVI). Let's split
the function that does the programming into two matching variants
as well.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-7-git-send-email-ville.syrjala@linux.intel.com

When the DDI port is in HDMI/DVI mode, it automagically uses the buffer
translations values from entry 9. Let's make that explicit in the code.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-6-git-send-email-ville.syrjala@linux.intel.com

Now that the SKL iboost programming is done from intel_ddi_pre_enable()
for HDMI, let's move the BXT bxt_ddi_vswing_sequence() call there as
well. This makes things look more similar to the DP/eDP case which
is handled in ddi_signal_levels().

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-5-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NImre Deak <imre.deak@intel.com>

Currently we fail to program the iboost stuff for HDMI/DVI. Let's remedy
that.

Cc: stable@vger.kernel.org
Fixes: f8896f5d ("drm/i915/skl: Buffer translation improvements")
Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-4-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>

Give a proper name for the SKL DDI_BUF_TRANS iboost bit.

Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-3-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>

Bspec says:
"For DDIA with x4 capability (DDI_BUF_CTL DDIA Lane Capability Control =
 DDIA x4), the I_boost value has to be programmed in both
 tx_blnclegsctl_0 and tx_blnclegsctl_4."

Currently we only program tx_blnclegsctl_0. Let's do the other one as
well.

Cc: stable@vger.kernel.org
Fixes: f8896f5d ("drm/i915/skl: Buffer translation improvements")
Cc: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-2-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NDavid Weinehall <david.weinehall@linux.intel.com>

INTEL_OUTPUT_DISPLAYPORT hsa been bugging me for a long time. It always
looks out of place besides INTEL_OUTPUT_EDP and INTEL_OUTPUT_DP_MST.
Let's just rename it to INTEL_OUTPUT_DP.

v2: Rebase
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NMika Kahola <mika.kahola@intel.com>
Reviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466621833-5054-9-git-send-email-ville.syrjala@linux.intel.com

Use the new output_types bitmask instead of has_dp_encoder.
To make it less oainlful provide a small helper
(intel_crtc_has_dp_encoder()) to do the bitsy stuff.

v2: Rebase
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466621833-5054-7-git-send-email-ville.syrjala@linux.intel.com

Since we now subclass struct drm_device, we can save pointer dances by
noting the equivalence of struct drm_device and struct drm_i915_private,
i.e. by using to_i915().

   text    data     bss     dec     hex filename
1073824    4562     416 1078802  107612 drivers/gpu/drm/i915/i915.ko
1068976    4562     416 1073954  106322 drivers/gpu/drm/i915/i915.ko

Created by the coccinelle script:

@@
expression E;
identifier p;
@@
- struct drm_i915_private *p = E->dev_private;
+ struct drm_i915_private *p = to_i915(E);
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NDave Gordon <david.s.gordon@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467628477-25379-1-git-send-email-chris@chris-wilson.co.uk

By using the out-of-line intel_wait_for_register() not only do we can
efficiency from using the hybrid wait_for() contained within, but we
avoid code bloat from the numerous inlined loops, in total (all patches):

   text    data     bss     dec     hex filename
1078551    4557     416 1083524  108884 drivers/gpu/drm/i915/i915.ko
1070775    4557     416 1075748  106a24 drivers/gpu/drm/i915/i915.ko
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467297225-21379-9-git-send-email-chris@chris-wilson.co.uk

We can check the power state of the PHY data and common lanes as
reported by the PHY. Do this in case we need to debug problems where the
PHY gets stuck in an unexpected state.

Note that I only check these when the lanes are expected to be powered
on purpose, since it's not clear at what point the PHY power/clock gates
things.

v2:
- Don't report the encoder as disabled when the sanity check fails.
  (Ville)

CC: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465825477-32671-1-git-send-email-imre.deak@intel.com

Rename these remaining function prefixes to better align with the
corresponding SKL functions.

No functional change.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>

So far we configured a static lane latency optimization during driver
loading/resuming. The specification changed at one point and now this
configuration depends on the lane count, so move the configuration
to modeset time accordingly.

It's not clear when this lane configuration takes effect. The
specification only requires that the programming is done before enabling
the port. On CHV OTOH the lanes start to power up already right after
enabling the PLL. To be safe preserve the current order and set things
up already before enabling the PLL.

v2: (Ander)
- Simplify the optimization mask calculation.
- Use the correct pipe_config always during the calculation instead
  of the bogus intel_crtc->config.

CC: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95476Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>

So far we depended on the HW to dynamically power down unused PHYs and
so we enabled them manually once during driver loading/resuming. There
are indications however that we can achieve better power savings by
manual powering toggling. So make the PHY enabling/disabling to happen
on-demand whenever we need either the corresponding AUX or port
functionality. CHV does this already by enabling the PHY along the
corresponding PHY common lane power wells there, do the same on BXT by
adding virtual power wells for the same purpose.

Also sanity check the common lane power down ack signal from the PHY. Do
this only when the PHY is enabled, since it's not clear at what point
the HW power/clock gates things.

While at it rename broxton_ prefix to bxt_ in related function names to
better align with the SKL code.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>