drm/i915/mtl: C20 state verification

Add state verification for C20 as we have one
for C10.

V2: Use abstractation of HW readout (Gustavo)
Drop MPLLA/B from message for TX and CMN
parameters (Gustavo)

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com> (v1,v2)
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231109112148.309669-1-mika.kahola@intel.com

drm/i915/display: Free crtc_state in verify_crtc_state

Free hw_crtc_state in verify_crtc_state after we are done using
this or else it's just a resource leak.

Fixes: 2745bdda2095 ("drm/i915: Stop clobbering old crtc state during state check")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231010053208.691260-1-suraj.kandpal@intel.com

drm/i915: s/dev_priv/i915/ in the state checker

Switch the state checker over to using the new 'i915' variable
name insteda of the old 'dev_priv'.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-13-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: s/pipe_config/crtc_state/ in the state checker

Switch over to the modern variable naming in the state checker.
Ie. rename the pipe_config stuff to crtc_state.

Also make it clear which is the "software state" (ie. what the
current state should be) vs. "hardware state" (ie. what the
currnet state really is).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-12-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Simplify the state checker calling convetions

We're passing in a totally random mismash of things into the state
checker. Clean it up to pass in the minimum needed.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-11-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Constify remainder of the state checker

Mark the remaining crtc states used by the state checker as const.
There is no reason to ever mutate them here.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-10-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Simplify snps/c10x DPLL state checker calling convetion

Passing in the atomic state + crtc state is a bit weird. The latter
can be just the crtc (which is the normal calling convention used
in a lot of other places).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Simplify watermark state checker calling convention

There is never any reason to pass in both the crtc and its state
as one can always dig out the crtc from its state. But for more
consistency across the whole state checker let's just pass the
overall atomic state+crtc here as well.

v2: Also pass state+crtc here (Jani)

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/20231005122713.3531-1-ville.syrjala@linux.intel.com

drm/i915: Simplify DPLL state checker calling convention

Make life simpler by just passing in the atomic state + crtc
instead of plumbing in all kinds of crtc states.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Stop clobbering old crtc state during state check

The state checker overwrites the old crtc state with the
current hardware state. While that does save a kmalloc() it seems
rather dubious as there might still be something that we need
in the old crtc state.

Stop doing that and just allocate a temporary state for the state
checker. Should the extra malloc during the commit phase turn out
too annoying we could of course preallocate one for each crtc, but
let's proceed with the straightforward approch for now.

And while at it let's mark the new crtc state as const to make
sure the state checker doesn't mess it up.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/display: add i915 parameter to I915_STATE_WARN()

Add i915 parameter to I915_STATE_WARN() and use device based logging.

Done using cocci + hand edited where there was no i915 local variable
ready.

v2: avoid null deref in verify_connector_state()

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230512181658.1735594-1-jani.nikula@intel.com

drm/i915/mtl: Add Support for C10 PHY message bus and pll programming

XELPDP has C10 and C20 phys from Synopsys to drive displays. Each phy
has a dedicated PIPE 5.2 Message bus for configuration. This message
bus is used to configure the phy internal registers.

XELPDP has C10 phys to drive output to the EDP and the native output
from the display engine. Add structures, programming hardware state
readout logic. Port clock calculations are similar to DG2. Use the DG2
formulae to calculate the port clock but use the relevant pll signals.
Note: PHY lane 0 is always used for PLL programming.

Add sequences for C10 phy enable/disable phy lane reset,
powerdown change sequence and phy lane programming.

Bspec: 64539, 64568, 64599, 65100, 65101, 65450, 65451, 67610, 67636

v2: Squash patches related to C10 phy message bus and pll
programming support (Jani)
Move register definitions to a new file i.e. intel_cx0_reg_defs.h (Jani)
Move macro definitions (Jani)
DP rates as separate patch (Jani)
Spin out xelpdp register definitions into a separate file (Jani)
Replace macro to select registers based on phy lane with
function calls (Jani)
Fix styling issues (Jani)
Call XELPDP_PORT_P2M_MSGBUS_STATUS() with port instead of phy (Lucas)
v3: Move clear request flag into try-loop
v4: On PHY idle change drm_err_once() as drm_dbg_kms() (Jani)
use __intel_de_wait_for_register() instead of __intel_wait_for_register
and uncomment intel_uncore.h (Jani)
Add DP-alt support for PHY lane programming (Khaled)
v4: Add tx and cmn on c10mpllb_state (Imre)
Add missing waits for pending transactions between two message bus
writes (Imre)
General cleanups and simplifications (Imre)
v5: Few nit cleanups from rev4 (imre)
s/dev_priv/i915/ , s/c10mpllb/c10pll/ (RK)
Rebase
v6: Move the mtl code from intel_c10pll_calc_port_clock to mtl function
Fix typo in comment for REG_FIELD_PREP8 definition(Imre)

Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com> (v4)
Link: https://patchwork.freedesktop.org/patch/msgid/20230413212443.1504245-4-radhakrishna.sripada@intel.com

drm/i915: Introduce intel_crtc_needs_fastset()

Replace the somewhat obscure crtc_state.update_pipe checks
with a more descriptive thing. Also nicely matches the
intel_crtc_needs_modeset() counterpart for full modesets.

v2: Handle one more case in the fbc code

Reviewed-by: Jani Nikula <jani.nikula@intel.com> #v1
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221021162442.27283-2-ville.syrjala@linux.intel.com

drm/i915: Extract skl_watermark.c

Pull all the skl+ watermark code (and the dbuf/sagv/ipc code
since it's all sort of intertwined and I'm too lazy to think
of a finer grained split right now) into its own file from the
catch-all intel_pm.c.

Also sneak in the s/dev_priv/i915/ rename while at it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908191646.20239-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Make M/N checks non-fuzzy

Now that we no longer fuzz M/N during fastset these should
match exctly.

In order to get a match with what the BIOS does we need to round
M/N down. And we do the opposite rounding when doing the readback.
That gets us pretty much the same thing back.

There can still be slight rounding differences between FDI M/N
vs. the DPLL output so we allow for tiny deviation in
intel_pipe_config_sanity_check().

v2: Tweak rounding/sanity check stuff a bit

Reviewed-by: Jani Nikula <jani.nikula@intel.com> #v1
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220907091057.11572-10-ville.syrjala@linux.intel.com

drm/i915/display: change who adds [] around crtc state dump context string

Add the brackets [] around crtc state dump context string in
intel_crtc_state_dump() so the callers don't have to.

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/c7d671279fb7d99eaf882bcb88c5c1d653755fb1.1655372759.git.jani.nikula@intel.com

drm/i915/display: split out crtc state dump to a separate file

Declutter intel_display.c by splitting out crtc state dumping to a
separate file.

v2: intel_pipe_config_dump -> intel_crtc_state_dump

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/f72a5626473692910263671af91e02251ed87eea.1655372759.git.jani.nikula@intel.com

drm/i915/display: split out modeset verification code

Add new file intel_modeset_verify.c for high level modeset verification
code to declutter intel_display.h. The new file is supposed to be about
crtc/encoder/connector verification; the state verification for very
specific functionality such as plls or wm should be placed next to the
code it verifies.

Fix some minor checkpatch issues while at it.

v2: Rebase

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/b9b47c14316a9edb772a8b8f934eabe7e928dd76.1655372759.git.jani.nikula@intel.com