drm/i915: Extract drm_dp_atomic_find_vcpi_slots cycle to separate function

We would be using almost same code to loop through bpps while calling
drm_dp_atomic_find_vcpi_slots - lets remove this duplication by
introducing a new function intel_dp_mst_find_vcpi_slots_for_bpp

v2: Fix pbn_div calculation - shouldn't matter if its DSC or not.
v3: FIx rebase conflict, constant_n no longer needed.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221101094222.22091-4-stanislav.lisovskiy@intel.com

drm/i915: Fix intel_dp_mst_compute_link_config

We currently always exit that bpp loop because
drm_dp_atomic_find_vcpi_slots doesn't care if we actually
can fit those or not.
I think that wasn't the initial intention here, especially when
we keep trying with lower bpps, we are supposed to keep trying
until we actually find some _working_ configuration, which isn't the
case here.
So added that drm_dp_mst_check here, so that we can make sure
that try all the bpps before we fail.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221101094222.22091-3-stanislav.lisovskiy@intel.com

drm: Add missing DP DSC extended capability definitions.

Adding DP DSC register definitions, we might need for further
DSC implementation, supporting MST and DP branch pass-through mode.

v2: - Fixed checkpatch comment warning
v3: - Removed function which is not yet used(Jani Nikula)

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221101094222.22091-2-stanislav.lisovskiy@intel.com

drm/i915: add new "soc" sub-directory and move PCH and DRAM code there

Add a new sub-directory for things that aren't specifically about the
GPU and don't really belong in the i915 driver top level, but also don't
belong under any of the existing sub-directories either.

Name it "soc", and move the PCH and DRAM code there.

Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221208142347.602726-1-jani.nikula@intel.com

drm/i915: Use ilk_lut_write*() for all ilk+ gamma modes

We could use the dsb to load the LUT in any gamma mode, not just
when using the multi-segment mode. So replace the direct mmio
on all ilk+ paths with the wrapper.

There are a few functions (ilk_load_lut_10(), ivb_load_lut_10())
that would never be used on a platform with dsb so we could
skip those, but probably better to keep all this 100% consistent
to avoid people getting confused and copy pasting the wrong thing
when adding a new gamma mode.

The gmch stuff I left with direct mmio since those are fairly
distinct and shouldn't cause too much confusion. Although
I've also pondered about converting everything over to dsb
command buffers and just executing it on the CPU when the
real hw is not available. But dunno if that would actually
be a good idea or not...

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-13-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Revert "drm/i915: Disable DSB usage for now"

This reverts commit 99510e1afb4863a225207146bd988064c5fd0629.

DSB is now getting disabled locally in the color management
code so we don't need to apply this big hammer via the device
info (not that we have other DSB users at the moment).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-12-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Disable DSB usage specifically for LUTs

The DSB has problem loading the LUTs at the moment. Some
of that is due to the palette anti collision logic, some
due to what seem real hw issues. Disable it the whole
thing locally in the color management code for now.

Note that we currently have this weird situation where on
adl+ we load parts of the LUT with DSB and parts with mmio.
That is due to the fact that only some parts of the LUT code
are using the DSB register write functions (ivb_load_lut_ext*()),
while the rest is using pure mmio (bdw_load_lut_10()). So now
we'll go back to pure mmio temporarily, until the DSB issues
get fixed (at which point we should be going for pure DSB).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-11-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Make DSB lower level

We could have many different uses for the DSB(s) during a
single commit, so the current approach of passing the whole
crtc_state to the DSB functions is far too high level. Lower
the abstraction a little bit so each DSB user can decide where
to stick the command buffer/etc.

v2: Document the intel_dsb_prepare() return value (Ankit)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-10-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Move the DSB setup/cleaup into the color code

Since the color management code is the only user of the DSB
at the moment move the DSB prepare/cleanup there too. The
code has to anyway make decisions on whether to use the DSB
or not (and how to use it). Also we'll need a place where we
actually generate the DSB command buffer ahead of time rather
than the current situation where it gets generated too late
during the mmio programming of the hardware.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-9-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Move the DSB->mmio fallback into the LUT code

The use of DSB has to be done differently on a case by case basis.
So no way this kind of blind mmio fallback in the guts of the DSB
code will work properly. Move it at least one level up into the
LUT loading code. Not sure if this is the way we want do the
DSB vs. mmio handling in the end, but at least it's a bit
closer than what we had before.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-8-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Document LUT "max" register precision

Document the precision of the LUT "max" registers, just
so we don't have to dig through the spec so much.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-7-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Standardize auto-increment LUT load procedure

Various gamma units on various platforms have some problems loading
the LUT index and auto-increment bit at the same time. We have to
do this in two steps. The first known case was the glk degamma LUT,
but at least ADL has another known case.

We're not going to suffer too badly from a couple of extra register
writes here, so let's just standardize on this practice for all
auto-increment LUT loads/reads. This way we never have to worry about
this specific issue again. And for good measure always reset the
index back to zero at the end (we already did this in a few places).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-6-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Clean up various indexed LUT registers

Use REG_BIT() & co. for the LUT index registers, and also
use the REG_FIELD_PREP() stuff a bit more consistently when
generating the values for said registers.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-5-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Define skl+ palette anti-collision bit

I've been frobbing the palette anti-collision logic bit
while playing around with DSB. Not sure we'll have real
use for this but let's define the bit anyways so I don't
have to carry it around locally.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-4-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Clean up GAMMA_MODE defines

Use REG_BIT() & co. for GAMMA_MODE bits.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-3-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

drm/i915: Shorten GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED a bit

s/GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED/GAMMA_MODE_MODE_12BIT_MULTI_SEG/
to make this thing slightly shorter.

Also fix up the platform comment while at it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123152638.20622-2-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915/mtl: Initial display workarounds

This patch introduces initial workarounds for mtl platform

v2: switch IS_MTL_DISPLAY_STEP to use IS_METEORLAKE from testing display
ver. (Tvrtko)

v3: clerical issues, extend 16015201720 to mtl. (MattR)

v4: make sure 16015201720 includes display 13. (MattR)

Bspec: 66624

Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221209220543.502047-1-matthew.s.atwood@intel.com

drm/i915: Improve PPS debugs

Always include both the encoder and PPS instance information
in the debug prints so that we know what piece of hardware
we're actually dealing with.

v2: Make sure pps is selected before debug prints/etc. in
    intel_pps_vdd_on_unlocked() on vlv/chv
    There is no pps on pipe C on chv
v3: Allow PPS=INVALID_PIPE for vlv/chv

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221127155239.26973-1-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

drm/i915: Fix whitespace

Stray spaces have snuck in where everything else uses tabs.

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-9-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

drm/i915: Print the PPS registers using consistent format

Use the consistent format when dumping out the PPS control/status
registers. Helps with pattern matching.

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-8-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

drm/i915: Reject unusable power sequencers

On ICP-ADP the pins used by the second PPS can be alternatively
muxed to some other function. In that case the second power
sequencer is unusable.

Unfortunately (on my ADL Thinkpad T14 gen3 at least) the
BIOS still likes to enable the VDD on the second PPS (due
to the VBT declaring the second bogus eDP panel) even when
not correctly muxed, so we need to deal with it somehow.
For now let's just initialize the PPS as normal, and then
use the normal eDP probe failure VDD off path to turn it off
(and release the wakeref the PPS init grabbed). The
alternative of just declaring that the platform has a single
PPS doesn't really work since it would cause the second eDP
probe to also try to use the first PPS and thus clobber the
state for the first (real) eDP panel.

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-7-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

drm/i915: Extend dual PPS handlind for ICP+

On the PCH side the second PPS was introduced in ICP. Let's
make sure we examine both power sequencer on ICP+ as well.

Note that DG1/2 south block only has the single PPS, so need
to exclude the fake DG1/2 PCHs.

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-6-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

drm/i915: Try to use the correct power sequencer intiially on bxt/glk

Currently on bxt/glk we just grab the power sequencer index from
the VBT data even though it may not have been parsed yet. That
could lead us to using the incorrect power sequencer during the
initial panel probe.

To avoid that let's try to read out the current state of the
power sequencer from the hardware. Unfortunately the power
sequencer no longer has anything in its registers to associate
it with the port, so the best we can do is just iterate through
the power sequencers and pick the first one. This should be
sufficient for single panel cases.

For the dual panel cases we probably need to go back to
parsing the VBT before the panel probe (and hope that
panel_type=0xff is never a thing in those cases). To that
end the code always prefers the VBT panel sequencer, if
available.

v2: Restructure a bit for upcoming icp+ dual PPS support

Cc: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-5-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

drm/i915: Generalize the PPS vlv_pipe_check() stuff

Restate the vlv_pipe_check() stuff in terms of PPS index
(rather than pipe, which it is on VLV/CHV) so that we can
reuse this same mechanim on other platforms as well.

Cc: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-4-ville.syrjala@linux.intel.com

drm/i915: Do panel VBT init early if the VBT declares an explicit panel type

Lots of ADL machines out there with bogus VBTs that declare
two eDP child devices. In order for those to work we need to
figure out which power sequencer to use before we try the EDID
read. So let's do the panel VBT init early if we can, falling
back to the post-EDID init otherwise.

The post-EDID init panel_type=0xff approach of assuming the
power sequencer should already be enabled doesn't really work
with multiple eDP panels, and currently we just end up using
the same power sequencer for both eDP ports, which at least
confuses the wakeref tracking, and potentially also causes us
to toggle the VDD for the panel when we should not.

Cc: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-3-ville.syrjala@linux.intel.com

drm/i915: Introduce intel_panel_init_alloc()

Introduce a place where we can initialize connector->panel
after it's been allocated. We already have a intel_panel_init()
so had to get creative with the name and came up with
intel_panel_init_alloc().

Cc: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-2-ville.syrjala@linux.intel.com

drm/i915/display: no need for gt/gen8_ppgtt.h

Remove an unnecessary include.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221208133638.478024-1-jani.nikula@intel.com

drm/i915/display: Don't disable DDI/Transcoder when setting phy test pattern

Bspecs has updated recently to remove the restriction to disable
DDI/Transcoder before setting PHY test pattern. This update is to
address PHY compliance test failures observed on a port with LTTPR.
The issue is that when Transc. is disabled, the main link signals fed
to LTTPR will be dropped invalidating link training, which will affect
the quality of the phy test pattern when the transcoder is enabled again.

v2: Update commit message (Clint)
v3: Add missing Signed-off in v2
v4: Update Bspec and commit message for pre-gen12 (Jani)

Bspec: 50482, 7555
Fixes: 8cdf72711928 ("drm/i915/dp: Program vswing, pre-emphasis, test-pattern")
Cc: Imre Deak <imre.deak@intel.com>
Cc: Clint Taylor <clinton.a.taylor@intel.com>
CC: Jani Nikula <jani.nikula@intel.com>
Tested-by: Khaled Almahallawy <khaled.almahallawy@intel.com>
Reviewed-by: Clint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Khaled Almahallawy <khaled.almahallawy@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123220926.170034-1-khaled.almahallawy@intel.com

drm/i915/vrr: Be more careful with the bits in TRANS_VRR_CTL

On mtl (at least) clearing the guardband bits in the same write
as the enable bit gets cleared seems to cause an immediate FIFO
underrun. Thus is seems that we need to first clear just the
enable bit, then wait for the VRR live status to indicate the
transcoder has exited VRR mode (this step is documented in Bspec
as well), and finally we can clear out the rest of the TRANS_VRR_CTL
for good measure.

I did this without any RMWs in case we want to toggle VRR on/off
via DSB in the future, and as we know DSB can't read registers.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221202134412.21943-5-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

drm/i915/vrr: Reorder transcoder vs. vrr enable/disable

On mtl it looks like disabling VRR after the transcoder has
been disabled can cause the pipe/transcoder to get stuck
when re-enabled in non-vrr mode. Reversing the order seems to
help.

Bspec is extremely confused about the VRR enable/disable sequence
anyway, and this now more closely matches the non-modeset VRR
sequence, whereas the full modeset sequence still claims that
the original order is fine. But since we eventually want to toggle
VRR without a full modeset anyway this seems like the better order
to follow.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221202134412.21943-4-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

drm/i915/vrr: Fix guardband/vblank exit length calculation for adl+

We are miscalculating both the guardband value, and the resulting
vblank exit length on adl+. This means that our start of vblank
(double buffered register latch point) is incorrect, and we also
think that it's not where it actually is (hence vblank evasion/etc.
may not work properly). Fix up the calculations to match the real
hardware behaviour (as reverse engineered by intel_display_poller).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221202134412.21943-3-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

drm/i915/vrr: Make registers latch in a consitent place on icl/tgl

Account for the framestart delay when calculating the "pipeline full"
value for icl/tgl vrr. This puts the start of vblank (ie. where the
double bufferd registers get latched) to a consistent place regardless
of what framestart delay value is used. framestart delay does not
change where start of vblank occurs in non-vrr mode and I can't see
any reason why we'd want different behaviour in vrr mode.

Currently framestart delay is always set to 1, and the hardcoded 4
scanlines in the code means we're currently delaying the start of
vblank by three extra lines. And with framestart delay set to 4 we'd
have no extra delay.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221202134412.21943-2-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

drm/i915: Fix VLV/CHV HDMI/DP audio enable

Despite what I claimed in commit c3c5dc1d9224
("drm/i915/audio: Do the vblank waits") the vblank
interrupts are in fact not enabled yet when we do the
audio enable sequence on VLV/CHV (all other platforms are
fine).

Reorder the enable sequence on VLV/CHV to match that of the
other platforms so that the audio enable happens after the
pipe has been enabled.

Fixes: c3c5dc1d9224 ("drm/i915/audio: Do the vblank waits")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221207225219.29060-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/tc: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8c29f4f76c2163da309ead0bf48652024f134f11.1670433372.git.jani.nikula@intel.com

drm/i915/snps: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4992661d93f8d5744e19408dc60ae49a5f2d597a.1670433372.git.jani.nikula@intel.com

drm/i915/wm: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/588815fc60752b6470ee4067246698d478309fa1.1670433372.git.jani.nikula@intel.com

drm/i915/gmbus: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/05690286d1521ec9c82d680122cca9a90a75b8dd.1670433372.git.jani.nikula@intel.com

drm/i915/dp-aux: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/262a0cf647b37e27a1c7776d3816e1b4ef959a91.1670433372.git.jani.nikula@intel.com

drm/i915/dmc: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bc144ab3565b10e71244cd09f72ce7df86f4b5c6.1670433372.git.jani.nikula@intel.com

drm/i915/power: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/21ea52a7c4fd400c256316143e3a2c9106c554d9.1670433372.git.jani.nikula@intel.com

drm/i915/crt: switch to intel_de_* register accessors in display code

Avoid direct uncore use in display code.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/39c198439be580052d1f78a44c96df7ba8ffd56d.1670433372.git.jani.nikula@intel.com

drm/i915/crt: drop a bunch of unnecessary register variables

There's no need to save the register offsets. Drop the variables.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3493286ecd1ae166e1e15235d31115f766f7c878.1670433372.git.jani.nikula@intel.com

drm/i915/de: return the old register value from intel_de_rmw()

A similar thing was added in intel_uncore_rmw(). Make it available for
display too.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b82cb29e8ece63e68499307f9e3e83139e590d23.1670433372.git.jani.nikula@intel.com

drm/i915/de: Add more macros to remove all direct calls to uncore

Add more de helpers to be able to avoid direct calls to uncore.

v3 by Jani:
- drop intel_de_write_samevalue/intel_de_rewrite_fw altogether

v2 by Jani:
- drop pcode stuff for now
- rename intel_de_write_samevalue -> intel_de_rewrite_fw

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0d051554dfeeb4d8aa3bc9136ed111fa35f647d8.1670433372.git.jani.nikula@intel.com

drm/i915/backlight: convert DRM_DEBUG_KMS() to drm_dbg_kms()

Fix the final straggler.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4769f8377be11536bd19840a2e59ef9f8c0a558c.1670405587.git.jani.nikula@intel.com

drm/i915/backlight: drop drm_device local variables in favor of i915

Prefer only having struct drm_i915_private *i915 around. Drop the
drm_device *dev locals.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/6a791b06ab84bb8fb719cd46934eb09644e3edc7.1670405587.git.jani.nikula@intel.com

drm/i915/backlight: mass rename dev_priv to i915

With the implicit dev_priv usage gone, we can rename dev_priv to i915
throughout. Do some drive-by whitespace cleanups while at it.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fc8b260bd8fa338edb312637f18ca7e6550d820d.1670405587.git.jani.nikula@intel.com

drm/i915/backlight: drop DISPLAY_MMIO_BASE() use from backlight registers

None of the remaining backlight registers that use DISPLAY_MMIO_BASE()
are used on VLV/CHV, which are the only platforms that have non-zero
base. Just drop the DISPLAY_MMIO_BASE() use, reducing the implicit
dev_priv references.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/75ae3f2945912f908df2444d4f0ab97a23b89897.1670405587.git.jani.nikula@intel.com

drm/i915/backlight: use VLV_DISPLAY_BASE for VLV/CHV backlight registers

Since the VLV/CHV backlight registers are only used on VLV/CHV, there's
no need to dynamically look up DISPLAY_MMIO_BASE(). We know it's
VLV_DISPLAY_BASE. Use it statically, reducing the implicit dev_priv
references.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/eb252083a56ec64b4fdb58d4d30abcf305a3a9c2.1670405587.git.jani.nikula@intel.com

drm/i915: Fix documentation for intel_uncore_forcewake_put__locked

intel_uncore_forcewake_put__locked() is used to release a reference.

Fixes: a6111f7b6604 ("drm/i915: Reduce locking in execlist command submission")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221207112909.2655251-1-linmq006@gmail.com

drm/i915/fbc: drop uncore locking around i8xx/i965 fbc nuke

The locking should not be needed after commits de5bd083d247
("drm/i915/fbc: Skip nuke when flip is pending") and 7cfd1a18c5f9
("drm/i915: Remove remaining locks from i9xx plane udpates").

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221205122918.3092092-1-jani.nikula@intel.com

drm/i915/hdmi: SPD infoframe update for discrete

Replace integrated with discrete for dgfx platforms.

v2: commit title reword (Jani)
v3: use variable name i915 (Jani)
v4: commit message reword (MattR)

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Taylor, Clinton A <clinton.a.taylor@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221129203343.720860-1-clinton.a.taylor@intel.com

drm/i915/dmc: Update DG2 DMC version to v2.08

Release notes:

1. Fixes for Register noclaims and few restore.

Fixes: c4cf059d9c2c ("drm/i915/dmc: Update DG2 DMC firmware to v2.07")
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221124162123.16870-1-gustavo.sousa@intel.com

drm/i915/dsc: Refactor dsc gen checks

Use HAS_DSC(__i915) wrapper containing runtime info of has_dsc
member. Platforms supporting dsc has this flag enabled; no need of
DISPLAY_VER() check.

Also, simplified intel_dsc_source_support() based on above changes.

Suggested-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221110093312.13932-1-swati2.sharma@intel.com

drm/i915/dsi: fix VBT send packet port selection for dual link DSI

intel_dsi->ports contains bitmask of enabled ports and correspondingly
logic for selecting port for VBT packet sending must use port specific
bitmask when deciding appropriate port.

Fixes: 08c59dde71b7 ("drm/i915/dsi: fix VBT send packet port selection for ICL+")
Cc: stable@vger.kernel.org
Signed-off-by: Mikko Kovanen <mikko.kovanen@aavamobile.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/DBBPR09MB466592B16885D99ABBF2393A91119@DBBPR09MB4665.eurprd09.prod.outlook.com

drm/i915/bios: fix a memory leak in generate_lfp_data_ptrs

When (size != 0 || ptrs->lvds_ entries != 3), the program tries to
free() the ptrs. However, the ptrs is not created by calling kzmalloc(),
but is obtained by pointer offset operation.
This may lead to memory leaks or undefined behavior.

Fix this by replacing the arguments of kfree() with ptrs_block.

Fixes: a87d0a847607 ("drm/i915/bios: Generate LFP data table pointers if the VBT lacks them")
Signed-off-by: Xia Fukun <xiafukun@huawei.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125063428.69486-1-xiafukun@huawei.com

drm/i915/dvo: Log about what was detected on which DVO port

Currently it's not 100% obvious which DVO encoder chip was
found on which port. Leave a slightly better trace in log.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-11-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Extract intel_dvo_regs.h

Pull the DVO port register definitons into their own header
to declutter i915_reg.h a bit.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-10-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Use intel_de_rmw() for DVO enable/disable

Replace the hand rolled RMW with intel_de_rmw() in the DVO
port enable/disable functions. Also switch to intel_de_posting_read()
for the posting read (though maybe it should be just be nuked...).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Use REG_BIT() & co. for DVO registers

Polish the DVO port registers with REG_BIT()/etc.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-8-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Rename the "active data order" bits

We have two sets of bits for DVO "data order" stuff. Rename
one set to ACT_DATA_ORDER to make it clear they are separate
bitfields.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-7-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Define a few more DVO register bits

Define a few extra interrupt related bits on the DVO register.
One of these we included in the DVO_PRESERVE_MASK already.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-6-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Parametrize DVO/DVO_SRCDIM registers

Get rid of the dvo_reg/dvo_srcdim_reg stuff by parametrizing
the DVO port registers.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo/sil164: Fix suspend/resume

Poke a few more bits into the SiI164 to make it
recover after S3. HEN/VEN are the important bits,
the rest PLL filter/HPD detection I just did
for good measure to match the BIOS programming.

Note that the spec recommended SCNT bit in REGC
isn't set by the BIOS at least for me, so I left
it out.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-4-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo/sil164: Nuke pointless return statements

Drop the pointless return statements at the end of void
functions.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo/ch7xxx: Fix suspend/resume

Poke a few more bits into the ch7xxx to make
it output a picture after being reset during S3.

In particular we need to set the input buffer select (IBS),
and enable VGA vsync output on the BCO pin. Selecting
VGA hsync on the c/h sync pin doesn't actually seem necessary
on my ADD card at least, but the BIOS selects it so why not.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120825.26338-2-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/hti: avoid theoretically possible negative shift

If phy is PHY_NONE, the shift to register bits becomes negative. Check
and warn about this.

Reported-by: coverity-bot <keescook@chromium.org>
References: https://lore.kernel.org/r/202211180848.D39006C@keescook
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20221122120948.3436180-1-jani.nikula@intel.com

drm/i915: Add 10bit gamma mode for gen2/3

Some gen2/gen3 parts have a 10bit gamma mode, on some pipes.
Expose it.

The format is different to the later i965+ style in that we
store a 10bit value and a 6 bit floating point slope for each
entry. Ie. the hardware extrapolates the intermediate steps
from the current LUT entry, instead of interpolating between
the current and next LUT entries. This also means we don't store
the last LUT entry in any register as it is defined by the previous
LUT entry's value+slope.

The slope has limited precision though (2 bit exponent + 4 bit
mantissa), so we'd have to allow for more error in the state checker
for the last entry and we have to make sure userspace doesn't
pass in something where the slope is simply to steep. In theory
we should perhaps check the slope for every interval, but we don't
do that for any other interpolated gamma mode and I suspect they
may also have some internal limit on the slope. I haven't confirmed
that theory though. Anyways, for ease of implementation we shall
just ignore the last entry in the state checker. If all the other
entries match anyway then that seems like a good indication that
the hardware was programmed as expected.

v2: Redo the state checker logic a bit
    Rebase due to other changes
v3: Fix C8 readout
v4: Use REG_FIELD_PREP()

Acked-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-20-ville.syrjala@linux.intel.com

drm/i915: Use gamma LUT for RGB limited range compression

On hsw+ and glk class hardware we current make a mess of
things when we have to both generate limited range output
and use the hw gamma LUT. Since we do the range compression
using the pipe CSC unit (which is situated before the gamma
LUT in the pipe) we are in fact applying the gamma to the
limited range data instead of the full range data as the
user intended.

We can work around this by applying the range compression
via the gamma LUT instead of using the pipe CSC for it.
Fairly easy to do now that we have the internal post_csc_lut
attachment point where we can stick our new cooked LUT.

On hsw+ this only needs to be done when using the split
gamma mode or when the ctm is enabled since otherwise we can
simply reorder the LUT vs. CSC. On glk we need to do this any
time a gamma LUT is used since no reordering is possible.
We do lose a bit of coverage in intel_color_assert_luts(),
but so be it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-19-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Use hw degamma LUT for sw gamma on glk with YCbCr output

On glk we can no longer reorder the hw LUTS vs. pipe CSC like
we could on earlier platforms, and neither do we have a
separate output CSC like on icl+. That means if we use the
pipe CSC for YCbCr output we are currently applying the gamma
LUT after the RGB->YCbCr conversion, which is just wrong.
The further we go from a linear curve the more distorted the
resulting colors become.

To work around this terrible limitation the best we can do is
repurpose the hw degamma LUT as a poor man's gamma LUT. Now
that we have the internal pre_csc_lut attachment point that
is not particularly hard to do.

What makes this less than ideal however is the fact that the
hw degamma LUT and gamma LUTs have very different capabilities.
The gamma LUT can operate in direct color type modes, whereas
the degamma LUT can't and just always operates in interpolated
mode. Additionally the degamma LUT is just a single 1D LUT, whereas
the gamma LUT is made of three separate 1D LUts (one for each channel).
So in order to make this semi-sensible we must also verify the
user supplied LUT more less matches the hw degamma LUT capabilities.
We still end up losing most of the LUT entries though, so the results
might be a bit crap.

The other option of flat out rejecting the YCbCr+gamma LUT combo
seems extremely likely to just cause a black screen for the user.
Eg. pretty sure Xorg always applies some kind of gamma LUT, and
if the user then plugs in a display that needs YCbCr output we're
toast.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-18-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Rework legacy LUT handling

Currently crtc_state_is_legacy_gamma() has a very specific set
of conditions, not all of which are actually necessary. Also
when we detect those conditions check_luts() just skips all
the checks. That will no longer work for glk soon when we'll
start to use the hw degamma LUT in place of the hw gamma LUT
for YCbCr output. So let's rework the logic to only really consider
whether the user provided gamma_lut is one that matches the hw
legacy LUT capabilities or not.

We'll need to reject C8+degamma on ivb+ since the presence of
degamma_lut would either mean we have to really use the LUT
for degamma as opposed to C8 palette, or we have to enable
split gamma mode which also can't work as the C8 palette.

Otherwise this will now cause the legacy LUT to go through the
regular lut checks as well. As a side effect we also start to
allow the use of the legacy LUT with CTM, but that is perfectly
fine as far a the hardware is concerned.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-17-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Finish the LUT state checker

We have full readout now for all platforms (sans the icl+
multi-segment readout hw fail), so hook up the LUT state
checker for everyone.

We add a new vfunc for this since different platforms need
to handle the details a bit differently.

The implementation is rather repetitive in places. Probably
we want to think of a more declarative approach for the
LUT precision/etc. stuff in the future...

Note that we're currently missing readout for c8_planes, so
we'll have to skip the state check in that case.

v2: Fix readout for C8 use cases
v3: Skip C8 entirely due to lack of c8_planes readout
    Add ilk_has_pre_csc_lut() helper and use other such helpers

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-16-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Make .read_luts() mandatory

Every platform now implements .read_luts(). Make it mandatory.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-15-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Prep for C8 palette readout

Add the approproate c8_planes checks to make the LUT
code ready for C8 palette readout. Note we currently
lack the actual c8_planes readout, so this won't work
yet. But no harm in making the code somewhat more ready
for the day when we do get c8_planes readout.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-14-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Make ilk_read_luts() capable of degamma readout

Just like ivb+, ilk/snb can select whether the hw lut acts as
gamma or degamma. Make the readout cognizant of that fact.

v2: deal with pre_csc_lut
v3: use ilk_has_post_csc_lut() helper

Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-13-ville.syrjala@linux.intel.com

drm/i915: Add gamma/degamma readout for ivb/hsw

We now have all the code necessary for gamma/degamma readout on
ivb/hsw. Plug it all in. As with bdw+ the cooked {pre,post}_csc_lut
make this trivial even in split gamma mode.

Note that on HSW if IPS is enabled the hardware will hang if
you try to access the LUT in split gamma mode. Thus we need to
reorder the LUT readout vs. IPS enable steps.

v2: deal with {pre,post}_csc_lut
    split gamma is no longer a problem
    handle HSW IPS w/a
v3: use ilk_has_post_csc_lut() helper

Reviewed-by: Uma Shankar <uma.shankar@intel.com> #v1
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-12-ville.syrjala@linux.intel.com

drm/i915: Add gamma/degamma readout for bdw+

Read out the gamma/degamma LUT on bdw+. Now that the
{pre,post}_csc_lut match the hardware LUT size even
in split gamma mode this is trivial.

v2: deal with {pre,post}_csc_lut
    split gamma is no longer a problem
v3: add ilk_has_post_csc_lut() helper

Reviewed-by: Uma Shankar <uma.shankar@intel.com> #v1
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-11-ville.syrjala@linux.intel.com

drm/i915: Read out CHV CGM degamma

Since CHV has the dedicate CGM degamma unit readout is trivial.
Just do it.

v2: deal with post_csc_lut

Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-10-ville.syrjala@linux.intel.com

drm/i915: Add glk+ degamma readout

Read out the degamma LUT on glk+. No state cheker as of yet since
it requires dealing with the glk csc vs. degamma mess.

v2: deal with post_csc_lut
v3: add icl_has_{pre,post}_csc_lut(*) helpers

Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-9-ville.syrjala@linux.intel.com

drm/i915: s/gamma/post_csc_lut/

Rename a the LUT state check foo_gamma_precision() functions
to foo_post_csc_lut_precision() to make it more clear what
they really do.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-8-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Fix adl+ degamma LUT size

The degamma LUT is interpolated so we need the 128th (==1.0)
entry to represent the full < 1.0 input range. Only the 129th
and 130th entries are strictly for the >=1.0 extended range
inputs.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-7-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Remove non-existent pipes from bigjoiner pipe mask

bigjoiner_pipes() doesn't consider that:
- RKL only has three pipes
- some pipes may be fused off

This means that intel_atomic_check_bigjoiner() won't reject
all configurations that would need a non-existent pipe.
Instead we just keep on rolling witout actually having
reserved the slave pipe we need.

It's possible that we don't outright explode anywhere due to
this since eg. for_each_intel_crtc_in_pipe_mask() will only
walk the crtcs we've registered even though the passed in
pipe_mask asks for more of them. But clearly the thing won't
do what is expected of it when the required pipes are not
present.

Fix the problem by consulting the device info pipe_mask already
in bigjoiner_pipes().

Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118185201.10469-1-ville.syrjala@linux.intel.com
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>

drm/i915: Enable SDP split for DP2.0

Enable the SDP split configuration for DP2.0.

v2: Move the register handling out of compute config function (JaniN)

v3: Patch styling and register access based on platform support (JaniN)

v4: Rebased

v5: Use unconditional clear bit in intel_de_rmw (Jani Nikula)

Bspec: 67768
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221121150718.1117628-1-vinod.govindapillai@intel.com

drm/i915/display: Add missing CDCLK Squash support for MTL

MTL supports both squash and crawl.

Cc: Clint Taylor <clinton.a.taylor@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118190008.824412-1-anusha.srivatsa@intel.com

drm/i915/display: Add CDCLK Support for MTL

As per bSpec MTL has 38.4 MHz Reference clock.
Adding the cdclk tables and cdclk_funcs that MTL
will use.

v2: Revert to using bxt_get_cdclk()

BSpec: 65243

Cc: Clint Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221117230002.792096-3-anusha.srivatsa@intel.com

drm/i915/display: Do both crawl and squash when changing cdclk

For MTL, changing cdclk from between certain frequencies has
both squash and crawl. Use the current cdclk config and
the new(desired) cdclk config to construct a mid cdclk config.
Set the cdclk twice:
- Current cdclk -> mid cdclk
- mid cdclk -> desired cdclk

Driver should not take some Pcode mailbox communication
in the cdclk path for platforms that are Display version 14 and later.

v2: Add check in intel_modeset_calc_cdclk() to avoid cdclk
change via modeset for platforms that support squash_crawl sequences(Ville)

v3: Add checks for:
- scenario where only slow clock is used and
cdclk is actually 0 (bringing up display).
- PLLs are on before looking up the waveform.
- Squash and crawl capability checks.(Ville)

v4: Rebase
- Move checks to be more consistent (Ville)
- Add comments (Bala)
v5:
- Further small changes. Move checks around.
- Make if-else better looking (Ville)

v6: MTl should not follow PUnit mailbox communication as the rest of
gen11+ platforms.(Anusha)

Cc: Clint Taylor <Clinton.A.Taylor@intel.com>
Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221117230002.792096-2-anusha.srivatsa@intel.com

drm/i915/display: Add missing checks for cdclk crawling

cdclk_sanitize() function was written assuming vco was a signed integer.
vco gets assigned to -1 (essentially ~0) for the case where PLL
might be enabled and vco is not a frequency that will ever
get used. In such a scenario the right thing to do is disable the
PLL and re-enable it again with a valid frequency.
However the vco is declared as a unsigned variable.
With the above assumption, driver takes crawl path when not needed.
Add explicit check to not crawl in the case of an invalid PLL.

v2: Move the check from .h to .c (MattR)
- Move check to bxt_set_cdclk() instead of
intel_modeset_calc_cdclk() which is directly in
the path of the sanitize() function (Ville)

v3: remove unwanted parenthesis(Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221117230002.792096-1-anusha.srivatsa@intel.com

drm/i915/dvo: Use per device debugs

Convert the lonely DRM_DEBUG_KMS() to the per-device variant.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-10-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: s/dev_priv/i915/

Follow the modern style and rename most 'dev_priv' variables
to 'i915'.

intel_dvo_init_dev() is the sole exception since it needs the
magic 'dev_priv' variable for the DPLL register macros.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: s/intel_encoder/encoder/ etc.

Remove the pointless intel_ namespace from our encoder/connector
variables.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-8-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Flatten intel_dvo_init()

The loop over intel_dvo_devices[] makes intel_dvo_init()
an ugly mess. Pull the i2c device probe out to a separate
function so that we can get rid of the loop and flatten
the code.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-7-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Eliminate useless 'port' variable

Reorder the drm_encoder_init() vs. encoder->port
assignment so that we don't need the extra 'port'
variable.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-6-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Introduce intel_dvo_connector_type()

Introduce intel_dvo_connector_type() as a counterpart to
intel_dvo_encoder_type(), mainly to declutter intel_dvo_init()
a bit.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Actually initialize the DVO encoder type

We call drm_encoder_init() before determining the correct
encoder type, thus we always end up with DRM_MODE_ENCODER_NONE.
Determine the correct encoder type earlier.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Don't leak connector state on DVO init failure

If we can't initialize the DVO encoder also free the connector
state allocated by intel_connector_alloc().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dvo: Remove unused panel_wants_dither

intel_dvo.panel_wants_dither is only set but never used.
We can't do dithering on the gmch side anyway since the
dithering logic is part of the integrated LVDS port and
not available for other output types.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-2-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/dg2: Drop force_probe requirement

DG2 has been very usable for a while now, and all of the uapi changes
related to fundamental platform usage have been finalized.  Recent CI
results have also been healthy, so we're ready to drop the force_probe
requirement and enable the platform by default.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221109001328.732000-1-matthew.d.roper@intel.com

drm/i915/mtl: Skip doubling channel numbers for LPDDR4/LPDDDR5

MTL LPDDR5 reported 16b with 8 channels. Previous platforms
reported 32b with 4 channels and hence needed a multiplication
by a factor of 2. Skip increasing the channels for MTL.

v2: Use version check instead of platform check(MattR)

Bspec: 64631
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221117213015.584417-2-radhakrishna.sripada@intel.com

drm/i915/mtl: Fix dram info readout

MEM_SS_INFO_GLOBAL Register info read from the hardware is cached in val. However
the variable is being modified when determining the DRAM type thereby clearing out
the channels and qgv info extracted later in the function xelpdp_get_dram_info. Preserve
the register value and use extracted fields in the switch statement.

Fixes: 825477e77912 ("drm/i915/mtl: Obtain SAGV values from MMIO instead of GT pcode mailbox")
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221117213015.584417-1-radhakrishna.sripada@intel.com

drm/i915/rpl-p: Add stepping info

Add stepping-substepping info in accordance to bpsec changes.

Bspec: 55376

Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221117214132.152061-1-matthew.s.atwood@intel.com