drm/i915/dsi: Read/write proper brightness value via MIPI DCS command

Driver has to swap the endian before send brightness level value
to tcon.

v2: Use __be16 instead of u16 to fix sparse warning.
v3: Send one or two bytes brightness value depend on the precision.
v4: get data length of brightness value more easily.

Reported-by: kernel test robot <lkp@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210908115607.9633-6-shawn.c.lee@intel.com

drm/i915/dsi: Retrieve max brightness level from VBT

So far, DCS backlight driver hardcode (0xFF) for max brightness level.
MIPI DCS spec allow max 0xFFFF for set_display_brightness (51h) command.
And VBT brightness precision bits can support 8 ~ 16 bits.

We should set correct precision bits in VBT that meet panel's request.
Driver can refer to this setting then configure max brightness level
in DCS backlight driver properly.

v2: modify variable name brightness_precision_bits instead of
    max_brightness_level.
v3: fix checkpatch warning.

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210908115607.9633-5-shawn.c.lee@intel.com

drm/i915: Get proper min cdclk if vDSC enabled

VDSC engine can process only 1 pixel per Cd clock. In case
VDSC is used and max slice count == 1, max supported pixel
clock should be 100% of CD clock. Then do min_cdclk and
pixel clock comparison to get proper min cdclk.

v2:
- Check for dsc enable and slice count ==1 then allow to
  double confirm min cdclk value.

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210908115607.9633-4-shawn.c.lee@intel.com

drm/i915/dsi: refine send MIPI DCS command sequence

According to chapter "Sending Commands to the Panel" in bspec #29738
and #49188. If driver try to send DCS long pakcet, we have to program
TX payload register at first. And configure TX header HW register later.
DSC long packet would not be sent properly if we don't follow this
sequence.

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210908115607.9633-3-shawn.c.lee@intel.com

drm/i915/dsi: wait for header and payload credit available

Driver should wait for free header or payload buffer in FIFO.
It would be good to wait a while for HW to release credit before
give it up to write to HW. Without sending initailize command
sets completely. It would caused MIPI display can't light up properly.

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210908115607.9633-2-shawn.c.lee@intel.com

drm/i915/display: Prepare DRRS for frontbuffer rendering drop

Frontbuffer rendering will be dropped for modern platforms but
before that we to prepare DRRS for it.

intel_drrs_flush and intel_drrs_invalidate will not be called
for platforms that will not support frontbuffer rendering so DRRS
needs another way to be notified about to page flips so it can change
between high and low refresh rates as needed.

Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210903221036.34770-3-jose.souza@intel.com

drm/i915/display: Share code between intel_drrs_flush and intel_drrs_invalidate

Both functions are pretty much equal, with minor changes that can be
handled by a single parameter.

v3:
- not scheduling work from invalidate operations

Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210903221036.34770-2-jose.souza@intel.com

drm/i915/display: Some code improvements and code style fixes for DRRS

It started as a code style fix for the lines above 100 col but it
turned out to simplifications to intel_drrs_set_state().
Now it receives the desired refresh rate type, high or low.

v3:
- Fixed the mode refesh rate debug message

Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210903221036.34770-1-jose.souza@intel.com

drm/i915/bios: get rid of vbt ddi_port_info

We can finally remove the extra caching in ddi_port_info. Good riddance.

v2: Rebased

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f56e864d10bb3cbe616288450d92b56325d1df12.1630512523.git.jani.nikula@intel.com

drm/i915/bios: use ddc pin directly from child data

Avoid extra caching of the data. This is slightly more subtle than one
would think. For one thing, we explicitly ignore 0 value in child device
ddc pin; this is specified as N/A and does not warrant a warning. For
another, we start looking for ddc pin collisions in sanitize using
unmapped pin numbering.

v2: Check !devdata in intel_bios_alternate_ddc_pin()

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e1dbf7cbdd2191439e760ab9098242dcec5fbb2e.1630512523.git.jani.nikula@intel.com

drm/i915/bios: move ddc pin mapping code next to ddc pin sanitize

Move code around to avoid a forward declaration in the future.

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8c5f723e0b2d8ffd6f47068edf710947b45843be.1630512523.git.jani.nikula@intel.com

drm/i915/bios: use alternate aux channel directly from child data

Avoid extra caching of the data.

v2: Check for !info->devdata in intel_bios_port_aux_ch() (Ankit)

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b1b9f0032b353c3279b4546d6acdb696fe0b6136.1630512523.git.jani.nikula@intel.com

drm/i915/bios: use dp max link rate directly from child data

Avoid extra caching of the data.

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5593ce81f6670dc33cf18fa284f8237c875ef404.1630512523.git.jani.nikula@intel.com

drm/i915/bios: use max tmds clock directly from child data

Avoid extra caching of the data.

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/451082780a8befb2b27919439c901a2159ce173f.1630512523.git.jani.nikula@intel.com

drm/i915/bios: use hdmi level shift directly from child data

Avoid extra caching of the data.

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ef22e40b01eab571ff0dc2bfffabb906d0151fb4.1630512523.git.jani.nikula@intel.com

drm/i915/dp: fix for ADL_P/S dp/edp max source rates

Added HBR3 support for ADL_P and ADL_S platform.

Bspec: 53597, 53720, 49185, 55409

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210901160402.24816-6-animesh.manna@intel.com

drm/i915/dp: fix DG1 and RKL max source rates

Combo phy is limited to 5.4 GHz on low-voltage SKUs, but both eDP and DP
can do 8.1 GHz on combo phy.

Bspec: 49182, 49205, 49202

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210901160402.24816-5-animesh.manna@intel.com

drm/i915/dp: fix EHL/JSL max source rates calculation

Only higher voltage sku can support HBR3 so a condition
check added in max source rate calculation for ehl/jsl.

Bspec: 32247, 20598

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210901160402.24816-4-animesh.manna@intel.com

drm/i915/dp: fix TGL and ICL max source rates

Combo phy is limited to 5.4 GHz on low-voltage SKUs. Combo phy DP is
limited to 5.4 GHz, while combo phy eDP can do 8.1 GHz.

Bspec: 20584, 20598, 49180, 49201

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210901160402.24816-3-animesh.manna@intel.com

drm/i915/dp: Fix eDP max rate for display 11+

intel_dp_set_source_rates() calls intel_dp_is_edp(), which is unsafe to
use before intel_encoder->type is set. This causes incorrect max source
rate to be used for display 11+. On EHL and JSL, HBR3 is used instead of
HBR2, and on the other affected platforms, HBR2 is used instead of HBR3.

Move intel_dp_set_source_rates() to after intel_encoder->type is
set. Add comment to intel_dp_is_edp() describing unsafe usages. Cleanup
intel_dp_init_connector() while at it.

Note: The same change was originally added as commit 680c45c767f6
("drm/i915/dp: Correctly advertise HBR3 for GEN11+"), but later reverted
due to issues in CI in commit d3913019602e ("Revert "drm/i915/dp:
Correctly advertise HBR3 for GEN11+"").

Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210901160402.24816-2-animesh.manna@intel.com

drm/i915/debugfs: clean up LPSP capable

Clean up the LPSP capability printout. No functional changes.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/097390f12da8de57c9d52ad675309d0422dec8fb.1630327990.git.jani.nikula@intel.com

drm/i915/debugfs: clean up LPSP status

Clean up the LPSP status printout. No functional changes.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c7c2db4e1434ed9a3545f2561a03dc593db5e674.1630327990.git.jani.nikula@intel.com

drm/i915/dp: fix DG2 max source rate check

Accidentally dropped the else in a rebase fail, causing the DG2 max rate
to be overwritten later in the if ladder.

Fixes: e752d1f9c14a ("drm/i915/dg2: add DG2 UHBR source rates")
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210901112815.16498-1-jani.nikula@intel.com

drm/i915/dsi/xelpd: Enable mipi dsi support.

Enable MIPI DSI support on ADL-P platform.
The esc clock changes, WA changes are taken care
in the previous patches.
As per the Bspec the seq remains to be same as TGL.

Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210826054811.10572-3-vandita.kulkarni@intel.com

drm/i915/dsi/xelpd: Add WA to program LP to HS wakeup guardband

Wa_16012360555 SW will have to program the "LP to HS Wakeup Guardband"
field to account for the repeaters on the HS Request/Ready PPI signaling
between the Display engine and the DPHY.

v2: Fix build issue.
v3: Align to new naming (Jani)

Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210826054811.10572-2-vandita.kulkarni@intel.com

drm/i915/display: Update small joiner ram size

Xelpd supports larger small joiner ram.

Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805101937.14664-1-vandita.kulkarni@intel.com

drm/i915/display: Renaming DRRS functions to intel_drrs_*()

We had a mix of intel_edp_drrs_*(), intel_dp_drrs_*() and
intel_dp_set_drrs_state(), so properly renaming all functions to
keep the same pattern.

While at it, also dropping intel_dp_set_drrs_state from the
documentation as it is a static function.

v3:
- dropping documentation style comment in static function
(intel_drrs_set_state)

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827174253.51122-3-jose.souza@intel.com

drm/i915/display: Move DRRS code its own file

intel_dp.c is a 5k lines monster, so moving DRRS out of it to reduce
some lines from it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827174253.51122-2-jose.souza@intel.com

drm/i915/display: Drop PSR support from HSW and BDW

At this point is sure that HSW and BDW will never have PSR enabled by
default, so here dropping it from device info and cleaning up code.

v2:
- enable psr support for display 9

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827174253.51122-1-jose.souza@intel.com

drm/i915/dg2: UHBR tables added for pll programming

UHBR modes has higher link rate and added new values for programming
mpll of SNPS phy. No change in sequence, only the pll parameters
are different for UHBR modes.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827103843.527-1-jani.nikula@intel.com

drm/i915: remove unused i915->active_pipes

Apparently the last reader of i915->active_pipes was removed with commit
ef79d62b5ce5 ("drm/i915: Encapsulate dbuf state handling harder"), and
now it's only ever written to. Remove it completely.

Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.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/20210826141830.889-1-jani.nikula@intel.com

drm/i915/fdi: convert BUG()'s to MISSING_CASE()

These shouldn't happen, but in the off chance they do, we'll want a
warning rather than panic.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b86132ac63f43f79e51eb63f948beccba85bf449.1629906431.git.jani.nikula@intel.com

drm/i915/fdi: move fdi mphy reset and programming to intel_fdi.c

This fairly detailed stuff that really has no place in
intel_display.c. Combine the calls into one to avoid exposing both.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b0037775480380e5d73d0b112da478d6f0ea30fe.1629906431.git.jani.nikula@intel.com

drm/i915/fdi: move more FDI stuff to FDI link train hooks

Accept slight duplication in the fdi link train hooks in exchange for
simplification in ilk_pch_enable(). This lets us make
ivb_update_fdi_bc_bifurcation() static again, now in intel_fdi.c.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/7984e670c6bb092d213d90f838d526d594d4a690.1629906431.git.jani.nikula@intel.com

drm/i915/fdi: move fdi bc bifurcation functions to intel_fdi.c

Move FDI related functions to intel_fdi.c. Don't bother with renaming as
we'll make the functions static shortly.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fd8afe4876f0b0762a9c69e01762a8dba31349e5.1629906431.git.jani.nikula@intel.com

drm/i915/fdi: move intel_update_fdi_pll_freq to intel_fdi.c

Move FDI related functions to intel_fdi.c. Rename to have intel_fdi
prefix while at it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da1609dfce4623f8ec86254aea6c2c8679b6a37f.1629906431.git.jani.nikula@intel.com

Merge tag 'drm-misc-intel-oob-hotplug-v1' of git://git./linux/kernel/git/hansg/linux into drm-intel-next

Topic branch for drm-misc / drm-intel for OOB hotplug support for Type-C connectors

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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# gpg: Signature made Fri 20 Aug 2021 01:29:15 PM EDT
# gpg:                using RSA key BAF03B5D2718411A5E9E177E92EC4779440327DC
# gpg:                issuer "hdegoede@redhat.com"
# gpg: Can't check signature: No public key
From: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/34f13e21-9b1a-5f54-7e03-9705a6b51428@redhat.com

drm/i915/snps: constify struct intel_mpllb_state arrays harder

The tables should be const arrays of const pointers, not just arrays of
const pointers.

Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210825145811.4227-1-jani.nikula@intel.com

drm/i915/panel: mass rename functions to have intel_panel_ prefix

Follow the usual naming conventions. Also pull HAS_GMCH() check to
intel_panel_fitting(). No functional changes.

Cc: Lyude Paul <lyude@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/9ff6e42e377bdb0c9349f50d9ea79671059633c7.1629888677.git.jani.nikula@intel.com

drm/i915/backlight: mass rename functions to have intel_backlight_ prefix

Follow the usual naming conventions. As a drive-by cleanup, also pass
intel_connector instead of drm_connector to intel_backlight_setup(). No
functional changes.

Cc: Lyude Paul <lyude@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ea1c22370210abdd4f5547af73c71b902061ea50.1629888677.git.jani.nikula@intel.com

drm/i915/backlight: extract backlight code to a separate file

In a long overdue refactoring, split out backlight code to new
intel_backlight.[ch]. Simple code movement, leave renames for follow-up
work. No functional changes.

Cc: Lyude Paul <lyude@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/97d310848f03061473b9b2328e2c5c4dcf263cfa.1629888677.git.jani.nikula@intel.com

drm/i915/dg2: Memory latency values from pcode must be doubled

The memory latency values returned by pcode on DG2 are in units of "2
usec" rather than 1 usec on all other platforms.  I.e., we need to
double the value returned by pcode to obtain the true latency value.

The bspec wording here was a bit ambiguous as to whether it wanted us to
multiply or divide the pcode value by two, but we confirmed offline with
the hardware team that we need to double the value the pcode gives us;
this change is intended to support a larger range of potential latency
values.

Bspec: 49326
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Harish Chegondi <harish.chegondi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210820225710.401136-1-matthew.d.roper@intel.com

drm/i915: Nuke intel_prepare_shared_dpll()

intel_prepare_shared_dpll() is now useless, so get rid of it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-14-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Fold ibx_pch_dpll_prepare() into ibx_pch_dpll_enable()

Move the FP divider programming into ibx_pch_dpll_enable(). No reason
that I can see why these would have to be programmed this early.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-13-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Fold i9xx_set_pll_dividers() into i9xx_enable_pll()

Can't think of a good reason why we'd need to program the FP
dividers so early. Let's just do it when programming the rest
of the DPLL.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-12-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Reuse ilk_needs_fb_cb_tune() for the reduced clock as well

Use ilk_needs_fb_cb_tune() for reduced_clock instead of hand rolling
it. Also ilk_needs_fb_cb_tune() can just use the precomputed M value
instead of calculating it again.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-11-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Call {vlv,chv}_prepare_pll() from {vlv,chv}_enable_pll()

We always call the vlv/chv prepare_pll() just before enable_pll().
Move the calls into the enable_pll() funcs. We can also
consolidate the DPLL_VCO_ENABLE checks while at it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-10-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Program DPLL P1 dividers consistently

On g4x and pch the DPLL has two P1 dividers (for refresh rate
switching). Program the FPx1 P1 divider consistently to the reduced
clock P1 divider if available, otherwise just program it to the
same value as the FPx0 P1 divider.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Remove the 'reg' local variable

Get rid of the local 'reg' variable for the DPLL control register
in i9xx_enable_pll(). We have other registers in there too so this
is just making things more confusing.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-8-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Clean up variable names in old dpll functions

s/pipe_config/crtc_state/ in the DPLL code.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-7-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Clean dpll calling convention

Stop passing both the crtc and its state to the DPLL functions.
The state alone is enough.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-6-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Constify struct dpll all over

Lots of places don't need to modify the DPLL params, so make
them const.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Extract ilk_update_pll_dividers()

Make the PCH dpll code match the gmch code by splitting
the FP register handling out from ilk_compute_dpll().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Clean up gen2 DPLL readout

The current gen2 DPLL readout code:
* assumes i845/i865 have LVDS which is not true
* assumes only pipe B can drive LVDS (true, but makes
  the code appear a bit magical)
* hard to parse in general

Clean it up by checking for i85x (the only gen2 platform
with LVDS) and reusing intel_lvds_port_enabled().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Set output_types to EDP for vlv/chv DPLL forcing

When we enable the DPLL for the PPS kick, let's tell the DPLL code
we're dealing with an eDP output. This shouldn't really matter, but
it's more consistent with the way the DPLL is configured when we're
actually enabling the eDP port for real.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715093530.31711-2-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915: Silence __iomem sparse warn

We don't care about __iomem mismatch when dealing with error
pointers. Silence it with ERR_CAST().

drivers/gpu/drm/i915/display/intel_dpt.c:136:21: warning: incorrect type in assignment (different address spaces)
drivers/gpu/drm/i915/display/intel_dpt.c:136:21:    expected struct i915_vma *[assigned] vma
drivers/gpu/drm/i915/display/intel_dpt.c:136:21:    got void [noderef] __iomem *[assigned] iomem

v2: The code moved into intel_dpt.c

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210712161815.24776-1-ville.syrjala@linux.intel.com
Reviewed-by: Matthew Auld <matthew.auld@intel.com>

drm/i915/fb: move user framebuffer stuff to intel_fb.c

Split out fb related stuff from intel_display.c to intel_fb.c.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/76b61738857619c1cce6e4306d14da19ee3bbf08.1629721467.git.jani.nikula@intel.com

drm/i915/fb: move intel_surf_alignment() to intel_fb.c

Split out fb related stuff from intel_display.c to intel_fb.c.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0b894be3a6acff5fe917b686771a084a6c2aa535.1629721467.git.jani.nikula@intel.com

drm/i915/fb: move intel_fb_align_height() to intel_fb.c

Split out fb related stuff from intel_display.c to intel_fb.c.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/7c97d29eeff676b510eafd242e2a6d7c8ed4a3a6.1629721467.git.jani.nikula@intel.com

drm/i915/fb: move intel_tile_width_bytes() to intel_fb.c

Split out fb related stuff from intel_display.c to intel_fb.c.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/35c3ade81a54fea890cf92e21b778c38ab78cd04.1629721467.git.jani.nikula@intel.com

drm/i915: add HAS_ASYNC_FLIPS feature macro

This will be needed in multiple places soon.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/08bf0f72435a4f9acb0ef31b82ca312b048c6bf6.1629721467.git.jani.nikula@intel.com

drm/i915/display: split out dpt out of intel_display.c

Let's try to reduce the size of intel_display.c, not increase it.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/934a2a0db05e835f6843befef6082e2034f23b3a.1629721467.git.jani.nikula@intel.com

drm/i915/fdi: make intel_fdi_link_freq() return int

The unsigned doesn't help us here.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.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/20210823093645.10464-1-jani.nikula@intel.com

drm/i915/dp: Drop redundant debug print

drm_dp_dpcd_read/write already has debug error message.
Drop redundant error messages which gives false
status even if correct value is read in drm_dp_dpcd_read().

v2: -Added fixes tag (Ankit)
v3: -Fixed build error (CI)

Fixes: 9488a030ac91 ("drm/i915: Add support for enabling link status and recovery")
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: <stable@vger.kernel.org> # v5.12+
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210812131107.5531-1-swati2.sharma@intel.com

drm/i915/dp: add max data rate calculation for UHBR rates

DP 2.0 UHBR link rates always use 128b/132b channel encoding, which has
a different data bandwidth efficiency from 8b/10b. The computation is
slightly convoluted due to the units we use; this is all explained in
the added comment.

v2: Clarified comment (Manasi)

Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8afd8d97a04c2d86c2dcadfed9f8e1f84272a13c.1629735412.git.jani.nikula@intel.com

drm/i915/dg2: add DG2 UHBR source rates

DG2 supports DP 2.0 UHBR and 128b/132b channel encoding.

Bspec: 53657, 54034
Acked-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8f82b7eb76f20f1c4ddd2cc7d1bb31e2173c55a6.1629735412.git.jani.nikula@intel.com

drm/i915/dg2: add TRANS_DP2_VFREQHIGH and TRANS_DP2_VFREQLOW

Add the registers for specifying the lower and higher 24 bits of the DP
2.0 pixel clock frequency in Hz.

Bspec: 53326
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/9047f10318a30bc03ce8516ee3f5512437a95663.1629735412.git.jani.nikula@intel.com

drm/i915/dg2: add TRANS_DP2_CTL register definition

This register controls the DP 2.0 datapath.

Bspec: 69967
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0d3529df4501c5dd8ad1da0b6dbaabcfa97510b4.1629735412.git.jani.nikula@intel.com

drm/i915/dp: read sink UHBR rates

See if sink supports DP 2.0 128b/132b channel encoding, and update sink
rates accordingly.

FIXME: Also take LTTPR 128b/132b into account.

v2: Add build-time check for ->sink_rates size (Ville)

Reviewed-by: Manasi Navare <manasi.d.navare@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/089d807e887d308c52c84cf58dfb6777de18872d.1629735412.git.jani.nikula@intel.com

drm/i915/dp: use actual link rate values in struct link_config_limits

The MST code uses actual link rates in the limits struct, while the DP
code in general uses indexes to the ->common_rates[] array. Fix the
confusion by using actual link rate values everywhere. This is a better
abstraction than some obscure index.

Rename the struct members while at it to ensure all the places are
covered.

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/d70ab7261abacd367d3a6a47102575eb88a55cd4.1629735412.git.jani.nikula@intel.com

drm/i915/adl_s: Update ADL-S PCI IDs

Sync PCI IDs with Bspec.

Bspec:53655

Changes since V2:
- Upstream devices which are "POR" yes and
  "Ok to upstream" yes - James Asmus
Changes since V1:
        - All POR and Non POR Ids needs to be upstreamed - James Asmus

Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210818050116.1116237-1-tejaskumarx.surendrakumar.upadhyay@intel.com

drm/i915/dp: Use max params for panels < eDP 1.4

Users reported that after commit 2bbd6dba84d4 ("drm/i915: Try to use
fast+narrow link on eDP again and fall back to the old max strategy on
failure"), the screen starts to have wobbly effect.

Commit a5c936add6a2 ("drm/i915/dp: Use slow and wide link training for
everything") doesn't help either, that means the affected eDP 1.2 panels
only work with max params.

So use max params for panels < eDP 1.4 as Windows does to solve the
issue.

v3:
 - Do the eDP rev check in intel_edp_init_dpcd()

v2:
 - Check eDP 1.4 instead of DPCD 1.1 to apply max params

Cc: stable@vger.kernel.org
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3714
Fixes: 2bbd6dba84d4 ("drm/i915: Try to use fast+narrow link on eDP again and fall back to the old max strategy on failure")
Fixes: a5c936add6a2 ("drm/i915/dp: Use slow and wide link training for everything")
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
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/20210820075301.693099-1-kai.heng.feng@canonical.com

drm/i915/fbc: Polish the skl+ FBC stride override handling

Polish the FBC stride override stuff:
- just call it override_cfb_stride since it'll be used on
  more gens later
- Use REG_BIT() & co. for the registers and give everything
  CHICKEN_ prefix since glk+ will have a different register
  for this
- Use intel_de_rmw() for the RMW

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210702204603.596-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

drm/i915/fbc: Move the "recompress on activate" to a central place

On ILK+ we current do a nuke right after activating FBC. If my
memory isn't playing tricks on me this is actially required if
FBC didn't stay disabled for a full frame. In that case the
deactivate+reactivate may not invalidate the cfb. I'd have to
double chekc to be sure though.

So let's keep the nuke, and just extend it backwards to cover
all the platforms by doing it a bit higher up.

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/20210702204603.596-4-ville.syrjala@linux.intel.com

drm/i915/fbc: Extract intel_fbc_update()

Pull the fbc enable vs. disable stuff into a small helper so
we don't have to have it pollute the higher level modeset code.

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/20210702204603.596-3-ville.syrjala@linux.intel.com

drm/i915/fbc: Rewrite the FBC tiling check a bit

Write the tiling check in a nicer form. No functional
changes due to Y-tile scanout being a gen9+ feature.

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/20210702204603.596-2-ville.syrjala@linux.intel.com

usb: typec: altmodes/displayport: Notify drm subsys of hotplug events

Use the new drm_connector_oob_hotplug_event() functions to let drm/kms
drivers know about DisplayPort over Type-C hotplug events.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20210817215201.795062-9-hdegoede@redhat.com

usb: typec: altmodes/displayport: Make dp_altmode_notify() more generic

Make dp_altmode_notify() handle the dp->data.conf == 0 case too,
rather then having separate code-paths for this in various places
which call it.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20210817215201.795062-8-hdegoede@redhat.com

drm/connector: Add support for out-of-band hotplug notification (v3)

Add a new drm_connector_oob_hotplug_event() function and
oob_hotplug_event drm_connector_funcs member.

On some hardware a hotplug event notification may come from outside the
display driver / device. An example of this is some USB Type-C setups
where the hardware muxes the DisplayPort data and aux-lines but does
not pass the altmode HPD status bit to the GPU's DP HPD pin.

In cases like this the new drm_connector_oob_hotplug_event() function can
be used to report these out-of-band events.

Changes in v2:
- Make drm_connector_oob_hotplug_event() take a fwnode as argument and
  have it call drm_connector_find_by_fwnode() internally. This allows
  making drm_connector_find_by_fwnode() a drm-internal function and
  avoids code outside the drm subsystem potentially holding on the
  a drm_connector reference for a longer period.

Changes in v3:
- Drop the data argument to the drm_connector_oob_hotplug_event
  function since it is not used atm. This can be re-added later when
  a use for it actually arises.

Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20210817215201.795062-5-hdegoede@redhat.com

drm/connector: Add drm_connector_find_by_fwnode() function (v3)

Add a function to find a connector based on a fwnode.

This will be used by the new drm_connector_oob_hotplug_event()
function which is added by the next patch in this patch-set.

Changes in v2:
- Complete rewrite to use a global connector list in drm_connector.c
  rather then using a class-dev-iter in drm_sysfs.c

Changes in v3:
- Add forward declaration for struct fwnode_handle to drm_crtc_internal.h
  (fixes warning reported by kernel test robot <lkp@intel.com>)

Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20210817215201.795062-4-hdegoede@redhat.com

drm/connector: Add a fwnode pointer to drm_connector and register with ACPI (v2)

Add a fwnode pointer to struct drm_connector and register an acpi_bus_type
for the connectors with the ACPI subsystem (when CONFIG_ACPI is enabled).

The adding of the fwnode pointer allows drivers to associate a fwnode
that represents a connector with that connector.

When the new fwnode pointer points to an ACPI-companion, then the new
acpi_bus_type will cause the ACPI subsys to bind the device instantiated
for the connector with the fwnode by calling acpi_bind_one(). This will
result in a firmware_node symlink under /sys/class/card#-<connecter-name>/
which helps to verify that the fwnode-s and connectors are properly
matched.

Changes in v2:
- Make drm_connector_cleanup() call fwnode_handle_put() on
  connector->fwnode and document this

Co-developed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20210817215201.795062-3-hdegoede@redhat.com

drm/connector: Give connector sysfs devices there own device_type

Give connector sysfs devices there own device_type, this allows us to
check if a device passed to functions dealing with generic devices is
a drm_connector or not.

A check like this is necessary in the drm_connector_acpi_bus_match()
function added in the next patch in this series.

Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20210817215201.795062-2-hdegoede@redhat.com

drm/i915/fdi: move intel_fdi_link_freq() to intel_fdi.[ch]

There's no performance reason to have it as static inline; move it out
of intel_display_types.h to reduce clutter and dependency on i915_drv.h.

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/8c9bb23d92878deb1ecc75427ec6648bd3505816.1629281426.git.jani.nikula@intel.com

drm/i915/panel: move intel_panel_use_ssc() out of headers

There's no performance reason to have it as static inline; move it out
of intel_display_types.h to reduce clutter and dependency on i915_drv.h.

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/6f2c05005e4fa43a5572b02b3f41363725ffdb4f.1629281426.git.jani.nikula@intel.com

drm/i915/pm: use forward declaration to remove an include

The fewer includes the better.

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/dcb426e4c6497f9ee3356c5f4fd4aaabd6295262.1629281426.git.jani.nikula@intel.com

drm/i915: intel_runtime_pm.h does not actually need intel_display.h

Reduce includes.

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/289a6837379c4422395c3ac2b36a6c2a44110227.1629281426.git.jani.nikula@intel.com

drm/i915/irq: reduce inlines to reduce header dependencies

Presumably if the compiler is smart, it does not generate an extra
function call to the update functions that are now static.

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/594f628740717cda5ef407a26ea03129c22ddc12.1629281426.git.jani.nikula@intel.com

drm/i915/adl_p: Also disable underrun recovery with MSO

One of the cases that the bspec lists for when underrun recovery must be
disabled is "COG;" that note actually refers to eDP multi-segmented
operation (MSO).  Let's ensure the this additional restriction is
honored by the driver.

Bspec: 50351
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Fixes: ba3b049f4774 ("drm/i915/adl_p: Allow underrun recovery when possible")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210816204112.2960624-1-matthew.d.roper@intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

drm/i915/dp: return proper DPRX link training result

After DPRX link training, intel_dp_link_train_phy() did not
return the training result properly. If link training failed,
i915 driver would not run into link train fallback function.
And no hotplug uevent would be received by user space application.

Fixes: b30edfd8d0b4 ("drm/i915: Switch to LTTPR non-transparent mode link training")
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210706152541.25021-1-shawn.c.lee@intel.com

drm/i915: Nuke ORIGIN_GTT

There is no users of it, so no need to keep handling for it.

Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210815014346.373945-2-jose.souza@intel.com

drm/i915/display: Fix sel fetch plane offset calculation

skl_calc_main_surface_offset() is used to calculate an aligned plane
surface address considering the inner framebuffer x and y offset.
It can not be used by selective fetch functions becase there is no
PLANE_SEL_FETCH_SURF.
So the PLANE_SEL_FETCH_OFFSET.y should only be PLANE_OFFSET.y +
damaged_area_within_plane.y1.

This fixes glitches seen in fbcon caused by typing something in
the terminal.

BSpec: 55229
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210815014346.373945-1-jose.souza@intel.com

drm/i915/dp: remove superfluous EXPORT_SYMBOL()

The symbol isn't needed outside of i915.ko.

Fixes: b30edfd8d0b4 ("drm/i915: Switch to LTTPR non-transparent mode link training")
Fixes: 264613b406eb ("drm/i915: Disable LTTPR support when the DPCD rev < 1.4")
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210816071737.2917-1-jani.nikula@intel.com

Merge drm/drm-next into drm-intel-next

Catch up with drm core changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge tag 'drm-misc-next-2021-08-12' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v5.15:

UAPI Changes:

Cross-subsystem Changes:
- Add lockdep_assert(once) helpers.

Core Changes:
- Add lockdep assert to drm_is_current_master_locked.
- Fix typos in dma-buf documentation.
- Mark drm irq midlayer as legacy only.
- Fix GPF in udmabuf_create.
- Rename member to correct value in drm_edid.h

Driver Changes:
- Build fix to make nouveau build with NOUVEAU_BACKLIGHT.
- Add MI101AIT-ICP1, LTTD800480070-L6WWH-RT panels.
- Assorted fixes to bridge/it66121, anx7625.
- Add custom crtc_state to simple helpers, and use it to
  convert pll handling in mgag200 to atomic.
- Convert drivers to use offset-adjusted framebuffer bo mappings.
- Assorted small fixes and fix for a use-after-free in vmwgfx.
- Convert remaining callers of non-legacy drivers to use linux irqs directly.
- Small cleanup in ingenic.
- Small fixes to virtio and ti-sn65dsi86.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1cf2d7fc-402d-1852-574a-21cbbd2eaebf@linux.intel.com

drm/i915/dg2: add SNPS PHY translations for UHBR link rates

UHBR link rates use different tx equalization settings. Using this will
require changes in the link training code too.

Bspec: 53920
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210813115151.19290-3-jani.nikula@intel.com

drm/i915/dg2: use existing mechanisms for SNPS PHY translations

We use encoder->get_buf_trans() in many places, for example
intel_ddi_dp_voltage_max(), and the hook was set to some old platform's
function for DG2 SNPS PHY. Convert SNPS PHY to use the same translation
mechanisms as everything else.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210813115151.19290-2-jani.nikula@intel.com

drm/i915/dp: pass crtc_state to intel_ddi_dp_level()

Needed in the future.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210813115151.19290-1-jani.nikula@intel.com

drm/i915/mst: use intel_de_rmw() to simplify VC payload alloc set/clear

Less is more, fewer lines to wonder about.

Cc: Manasi Navare <manasi.d.navare@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/20210813115610.20010-1-jani.nikula@intel.com

drm/i915/edp: fix eDP MSO pipe sanity checks for ADL-P

ADL-P supports stream splitter on pipe B in addition to pipe A. Update
the sanity check in intel_ddi_mso_get_config() to reflect this, and
remove the check in intel_ddi_mso_configure() as redundant with
encoder->pipe_mask. Abstract the splitter pipe mask to a single point of
truth while at it to avoid similar mistakes in the future.

Fixes: 7bc188cc2c8c ("drm/i915/adl_p: enable MSO on pipe B")
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Swati Sharma <swati2.sharma@intel.com>
Reviewed-by: Swati Sharma <swati2.sharma@intel.com>
Tested-by: Swati Sharma <swati2.sharma@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210812132354.10885-1-jani.nikula@intel.com

fbdev/efifb: Release PCI device's runtime PM ref during FB destroy

Atm the EFI FB platform driver gets a runtime PM reference for the
associated GFX PCI device during probing the EFI FB platform device and
releases it only when the platform device gets unbound.

When fbcon switches to the FB provided by the PCI device's driver (for
instance i915/drmfb), the EFI FB will get only unregistered without the
EFI FB platform device getting unbound, keeping the runtime PM reference
acquired during the platform device probing. This reference will prevent
the PCI driver from runtime suspending the device.

Fix this by releasing the RPM reference from the EFI FB's destroy hook,
called when the FB gets unregistered.

While at it assert that pm_runtime_get_sync() didn't fail.

v2:
- Move pm_runtime_get_sync() before register_framebuffer() to avoid its
  race wrt. efifb_destroy()->pm_runtime_put(). (Daniel)
- Assert that pm_runtime_get_sync() didn't fail.
- Clarify commit message wrt. platform/PCI device/driver and driver
  removal vs. device unbinding.

Fixes: a6c0fd3d5a8b ("efifb: Ensure graphics device for efifb stays at PCI D0")
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v1)
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210809133146.2478382-1-imre.deak@intel.com