drm/i915/display: Implement DRM infoframe read for LSPCON

Implement Read back of HDR metadata infoframes i.e Dynamic Range
and Mastering Infoframe for LSPCON devices.

v2: Added proper bitmask of enabled infoframes as per Ville's
recommendation.

v3: Dropped a redundant wrapper as per Ville's comment.

v4: Dropped a redundant print, added Ville's RB.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130204738.2443-14-uma.shankar@intel.com

drm/i915/lspcon: Create separate infoframe_enabled helper

Lspcon has Infoframes as well as DIP for HDR metadata(DRM Infoframe).
Create a separate mechanism for lspcon compared to HDMI in order to
address the same and ensure future scalability.

v2: Streamlined this as per Ville's suggestions, making sure that
HDMI infoframe versions are directly returned instead of a redundant
and confusing DIP overhead.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130204738.2443-12-uma.shankar@intel.com

drm/i915/display: Attach HDR property for capable Gen9 devices

Attach HDR property for Gen9 devices with MCA LSPCON
chips.

v2: Cleaned HDR property attachment logic based on capability
as per Jani Nikula's suggestion.

v3: Fixed the HDR property attachment logic as per the new changes
by Kai-Feng to align with lspcon detection failure on some devices.

v4: Add HDR proprty in late_register to handle lspcon detection,
as suggested by Ville.

v5: Init Lspcon only if advertized from BIOS.

v6: Added a Todo to plan a cleanup later, added Ville's RB.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130204738.2443-4-uma.shankar@intel.com

drm/i915/display: Enable HDR on gen9 devices with MCA Lspcon

Gen9 hardware supports HDMI2.0 through LSPCON chips.
Extending HDR support for MCA LSPCON based GEN9 devices.

SOC will drive LSPCON as DP and send HDR metadata as standard
DP SDP packets. LSPCON will be set to operate in PCON mode,
will receive the metadata and create Dynamic Range and
Mastering Infoframe (DRM packets) and send it to HDR capable
HDMI sink devices.

v2: Re-used hsw infoframe write implementation for HDR metadata
for LSPCON as per Ville's suggestion.

v3: Addressed Jani Nikula's review comments.

v4: Addressed Ville's review comments, removed redundant wrapper
and checks, passed arguments instead of hardcodings.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130204738.2443-3-uma.shankar@intel.com

drm/i915/display: Add HDR Capability detection for LSPCON

LSPCON firmware exposes HDR capability through LPCON_CAPABILITIES
DPCD register. LSPCON implementations capable of supporting
HDR set HDR_CAPABILITY bit in LSPCON_CAPABILITIES to 1. This patch
reads the same, detects the HDR capability and adds this to
intel_lspcon struct.

v2: Addressed Jani Nikula's review comment and fixed the HDR
capability detection logic

v3: Deferred HDR detection from lspcon_init (Ville)

v4: Addressed Ville's minor review comments, added his RB.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130204738.2443-2-uma.shankar@intel.com

drm/i915: Nuke lspcon_ycbcr420_config()

Remove the lspcon special case from intel_dp_compute_config() and
just treat it like any other DFP than can do 4:4:4->4:2:0 conversion.

The only difference between the two codepaths was that the lspcon
code tried to already halve port_clock. That was just total nonsense
as we hadn't even computed the base port_clock at that time.
All that stuff happens intel_dp_compute_link_config*() and it
already takes care of the 4:2:0 clock reduction.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200924184156.24491-2-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

drm/i915: Init lspcon after HPD in intel_dp_detect()

On HP 800 G4 DM, if HDMI cable isn't plugged before boot, the HDMI port
becomes useless and never responds to cable hotplugging:
[ 3.031904] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 3.031945] [drm:intel_ddi_init [i915]] *ERROR* LSPCON init failed on port D

Seems like the lspcon chip on the system only gets powered after the
cable is plugged.

Consilidate lspcon_init() into lspcon_resume() to dynamically init
lspcon chip, and make HDMI port work.

v6:
- Rebase on latest for-linux-next.
v5:
- Consolidate lspcon_resume() with lspcon_init().
- Move more logic into lspcon code.
v4:
- Trust VBT in intel_infoframe_init().
- Init lspcon in intel_dp_detect().
v3:
- Make sure it's handled under long HPD case.
v2:
- Move lspcon_init() inside of intel_dp_hpd_pulse().

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/203
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200610075542.12882-1-kai.heng.feng@canonical.com

drm/i915/display: prefer dig_port to reference intel_digital_port

We have a mix of dport, intel_dport, intel_dig_port and dig_port to
reference a intel_digital_port struct. Numbers are around

5 intel_dport
36 dport
479 intel_dig_port
352 dig_port

Since we already removed the intel_ prefix from most of our other
structs, do the same here and prefer dig_port.

v2: rename everything in i915, not just a few display sources and
reword commit message (from Matt Roper)

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701045054.23357-1-lucas.demarchi@intel.com

drm/i915: move modesetting output/encoder code under display/

Add a new subdirectory for display code, and start off by moving
modesetting output/encoder code. Judging by the include changes, this is
a surprisingly clean operation.

v2:
- move intel_sdvo_regs.h too
- use tabs for Makefile file lists and sort them

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190613084416.6794-2-jani.nikula@intel.com