drm/i915: Introduce for_each_shared_dpll()

No one really cares how we store the shared_dplls. Currently
it happens to be an array, but we could change that to a more
flexible scheme at some point. Hide the implementation details
behind an iterator macro.

The slight downside is the pll variable moving out of the
loop scope, but maybe someday soon we'll start to convert
everything over to having declarations within for-statements...

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/20231003200620.11633-4-ville.syrjala@linux.intel.com

drm/i915: Stop requiring PLL index == PLL ID

There's no good reason to keep around this PLL index == PLL ID
footgun. Get rid of it.

Both i915->shared_dplls[] and state->shared_dpll[] are indexed
by the same thing now, which is just the index we get at
initialization from dpll_mgr->dpll_info[]. The rest is all about
PLL IDs now.

v2: Add pll->index to mimic drm_crtc & co.
Remove the comment saying ID should match the index
v3: s/i/pll->index/ in debugfs loop (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/20231003200620.11633-2-ville.syrjala@linux.intel.com

drm/i915/hsw: s/HSW/HASWELL for platform/subplatform defines

Follow consistent naming convention. Replace HSW with
HASWELL.

Signed-off-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230801135344.3797924-2-dnyaneshwar.bhadane@intel.com

drm/i915/display/pch: use intel_de_rmw if possible

The helper makes the code more compact and readable.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230105131046.2173431-5-andrzej.hajda@intel.com

drm/i915: move pch_ssc_use to display sub-struct under dpll

Move the display related member to the struct drm_i915_private display
sub-struct.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230117143946.2426043-2-jani.nikula@intel.com

drm/i915: stop including i915_irq.h from i915_trace.h

Turns out many of the files that need i915_reg.h get it implicitly via
{display/intel_de.h, gt/intel_context.h} -> i915_trace.h -> i915_irq.h
-> i915_reg.h. Since i915_trace.h doesn't actually need i915_irq.h,
makes sense to drop it, but that requires adding quite a few new
includes all over the place.

Prefer including i915_reg.h where needed instead of adding another
implicit include, because eventually we'll want to split up i915_reg.h
and only include the specific registers at each place.

Also some places actually needed i915_irq.h too.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/6e78a2e0ac1bffaf5af3b5ccc21dff05e6518cef.1668008071.git.jani.nikula@intel.com

drm/i915: Feed the DPLL output freq back into crtc_state

Fill port_clock and hw.adjusted_mode.crtc_clock with the actual
frequency we're going to be getting from the hardware. This will
let us accurately compute all derived state that depends on those.

v2: Reintroduce iCLKIP WARN
v3: Try to deal with VLV/BXT DSI PLL as well

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/20220907091057.11572-8-ville.syrjala@linux.intel.com

drm/i915/pch: replace BUG_ON() with drm_WARN_ON()

Avoid BUG_ON(). Replace with drm_WARN_ON().

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220830093411.1511040-3-jani.nikula@intel.com

drm/i915: move vbt to display.vbt

Move display VBT related members under drm_i915_private display
sub-struct.

v2: Rebase

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/db4b648b201ea0b79654fec2028120999a735db0.1661779055.git.jani.nikula@intel.com

drm/i915: move dpll under display.dpll

Move display dpll related members under drm_i915_private display
sub-struct.

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/8818a2a4330edb9800f567626958b2de8872aa63.1661346845.git.jani.nikula@intel.com

drm/i915: Remove bogus LPT iCLKIP WARN

The WARN shouldn't have been added yet. For the moment the
clock that gets passed here is just what the user has requested
(via the modeline) and may not be exactly what iCLKIP can
generate.

Later on the plan is to change things so that we already get
passed the exact clock here, at which point the WARN should
be reintroduced.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6246
Fixes: 97708335b04d ("drm/i915: Introduce struct iclkip_params")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220616095530.15024-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Introduce struct iclkip_params

Pull the various iCLKIP parameters into a struct. Later on
we'll reuse this during the state computation to determine
the exact dotclock the hardware will be generating for us.

v2: Don't lose the phaseinc calculation
v3: Drop the misplaced '#include <intel_pch_refclk.h>' from intel_crt.c (Jani)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220504212109.26369-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Move PCH refclock stuff into its own file

Move the PCH refclk stuff (including all the LPT/WPT
iCLKIP/CLKOUT_DP things) to its own file.

We also suck in the mPHY programming from intel_fdi.c
since we're the only caller.

Cc: Dave Airlie <airlied@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015071625.593-2-ville.syrjala@linux.intel.com
Reviewed-by: Dave Airlie <airlied@redhat.com>