Backmerge drm-next for the reworked device register/unregistering.
Chris Wilson needs that to be able to land his i915 load/unload
demidlayering.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
During hibernation the cached DP port register value will be left with
whatever value we have there when we create the hibernation image.
Currently that means the port (and eDP PLL) will be off in the cached
value. However when we resume there is no guarantee that the value
in the actual register will match the cached value. If i915 isn't
loaded in the kernel that loads the hibernation image, the port may
well be on (eg. left on by the BIOS). The encoder state readout
does the right thing in this case and updates our encoder state
to reflect the actual hardware state. However the post-resume modeset
will then use the stale cached port register value in
intel_dp_link_down() and potentially confuse the hardware.
This was caught by the following assert
WARNING: CPU: 3 PID: 5288 at ../drivers/gpu/drm/i915/intel_dp.c:2184 assert_edp_pll+0x99/0xa0 [i915]
eDP PLL state assertion failure (expected on, current off)
on account of the eDP PLL getting prematurely turned off when
shutting down the port, since the DP_PLL_ENABLE bit wasn't set
in the cached register value.
Presumably I introduced this problem in
commit 6fec766283 ("drm/i915: Use intel_dp->DP in eDP PLL setup")
as before that we didn't update the cached value after shuttting the
port down. That's assuming the port got enabled at least once prior
to hibernating. If that didn't happen then the cached value would
still have been totally out of sync with reality (eg. first boot w/o
eDP on, then hibernate, and then resume with eDP on).
So, let's fix this properly and refresh the cached register value from
the hardware register during resume.
DDI platforms shouldn't use the cached value during port disable at
least, so shouldn't have this particular issue. They might still have
issues if we skip the initial modeset and then try to retrain the link
or something. But untangling this DP vs. DDI mess is a bigger topic,
so let's jut punt on DDI for now.
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org
Fixes: 6fec766283 ("drm/i915: Use intel_dp->DP in eDP PLL setup")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463162036-27931-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
The PPS registers are backed by power well #0 and as such may be reset
after system or runtime suspend (both implying a possible DC9
transition). Fix this by reusing the VLV/CHV PPS pipe-reassignment
logic. The difference on BXT is that the PPS instances are not pipe but
port (or more accurately pin) specific, so we only need to care about
the lost HW state. As opposed to VLV/CHV the SW state is fixed and
initialized during connector init.
This also paves the way towards using the actual port->PPS instance
mapping based on VBT.
This fixes eDP link training errors on BXT after suspend, where we
started the link training too early due to an incorrect T3 (panel power
on) register value.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96436
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466084243-5388-2-git-send-email-imre.deak@intel.com
Move the early PPS initialization calls next to the rest of PPS
initialization steps. This allows us to forgo a duplicated call to
intel_dp_init_panel_power_sequencer_registers() on VLV/CHV.
This will swap the order of DP AUX registration wrt. PPS initialization.
There is an existing race here in case of a user space access via the
DPAUX device node after DP AUX registration and before calling
intel_dp_init_panel_power_sequencer_registers(), but this change won't
make this worse. The fix for this is to separate DP AUX initialization
and registration, that's a separate work already underway.
The order of MST wrt. PPS init as well as the order of
intel_dp_init_panel_power_sequencer_registers() wrt.
intel_edp_panel_vdd_sanitize() also swap, which is ok, there are no
dependencies between these steps.
Suggested by Ville.
CC: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466499109-20240-4-git-send-email-imre.deak@intel.com
Atm on IBX/CPT we attempt to detect if eDP is present even if LVDS was
already detected and an encoder for it was registered. This involves
trying to read out the eDP DPCD, which in turn needs the same power
sequencer that LVDS uses. Poking at the VDD line at an unexpected time
may or may not interfere with the LVDS panel, but it's probably safer to
prevent this. Registering both an LVDS and an eDP connector would also
present a similar problem accessing the shared PPS at any point later in
an unexpected way.
We also need this to be able fix PPS initialization before its first use
in the next patch. For that we want to be sure that PPS is not in use
by LVDS.
v2:
- Split out the PPS init fix to a separate patch. (Chris)
- Add comment about eDP init depending on LVDS init. (Chris)
- Make the use of the intel_encoder ptr less error prone.
v3:
- Use IBX/CPT reference instead of the incorrect ILK, add a WARN about
this. (Ville)
v4:
- Use a helper to get the lvds encoder instead of opencoding the same.
(Ville)
CC: Ville Syrjälä <ville.syrjala@linux.intel.com>
CC: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v2)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v3)
Link: http://patchwork.freedesktop.org/patch/msgid/1466499109-20240-2-git-send-email-imre.deak@intel.com
The drm_dp_aux is associated with the intel_dp encoder and not the
connector. Since the encoder is destroyed before the connector,
attempting to free the drm_dp_aux from inside the connector cleanup
causes a use-after-free.
This was applied to the patch that CI was happy with, but in the
confusion of so many series trying to make CI happy, the unready
patch was plucked.
Fixes: c191eca110 ("drm/i915: Move intel_connector->unregister to connector->early_unregister")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466411357-730-1-git-send-email-chris@chris-wilson.co.uk
- some polish for the guc code (Dave Gordon)
- big refactoring of gen9 display clock handling code (Ville)
- refactoring work in the context code (Chris Wilson)
- give encoder/crtc/planes useful names for debug output (Ville)
- improvements to skl/kbl wm computation code (Mahesh Kumar)
- bunch of smaller improvements all over as usual
* tag 'drm-intel-next-2016-06-06' of git://anongit.freedesktop.org/drm-intel: (64 commits)
drm/i915: Update DRIVER_DATE to 20160606
drm/i915: Extract physical display dimensions from VBT
drm/i915: Silence "unexpected child device config size" for VBT on 845g
drm/i915/skl+: Use scaling amount for plane data rate calculation (v4)
drm/i915/skl+: calculate plane pixel rate (v4)
drm/i915/skl+: calculate ddb minimum allocation (v6)
drm/i915: Don't try to calculate relative data rates during hw readout
drm/i915: Only ignore eDP ports that are connected
drm/i915: Update GEN6_PMINTRMSK setup with GuC enabled
drm/i915: kill STANDARD/CURSOR plane screams
drm/i915: Give encoders useful names
drm/i915: Give meaningful names to all the planes
drm/i915: Don't leak primary/cursor planes on crtc init failure
drm/i915: Set crtc->name to "pipe A", "pipe B", etc.
drm/i915: Use plane->name in debug prints
drm/i915: Use crtc->name in debug messages
drm/i915: Reject modeset if the dotclock is too high
drm/i915: Fix NULL pointer deference when out of PLLs in IVB
drm/i915/ilk: Don't disable SSC source if it's in use
drm/i915/bxt: Sanitize CDCLK to fix breakage during S4 resume
...
Mostly this is unexpected indents. But really it's just a
demonstration for my patch, all these issues have been found&fixed
using the correct source file and line number support I just added.
All line numbers have been perfectly accurate.
One issue looked a bit fishy in intel_lrc.c, where I don't quite grok
what sphinx is unhappy about. But since that file looks like it has
never seen a proper kernel-doc parser I figured better to fix in a
separate path.
v2: Use fancy new &drm_device->struct_mutex linking (Jani).
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: linux-doc@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Backmerge request by Jani to get at
commit 249c4f538b
Author: Deepak M <m.deepak@intel.com>
Date: Wed Mar 30 17:03:39 2016 +0300
drm: Add new DCS commands in the enum list
Some simple conflicts in intel_dp.c.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
- prep work for struct_mutex-less gem_free_object
- more invasive/tricky mst fixes from Lyude for broken hw. I discussed
this with Ville/Jani and we all agreed more soaking in -next would be
real good this late in the -rc cycle. They're cc: stable too to make
sure they're not getting lost. Feel free to cherry-pick those four if
you disagree.
- few small things all over
* tag 'topic/drm-misc-2016-04-29' of git://anongit.freedesktop.org/drm-intel:
drm/atomic: Add missing drm_crtc_internal.h include
drm/dp: Allow signals to interrupt drm_aux-dev reads/writes
drm: Quiet down drm_mode_getresources
drm: Quiet down drm_mode_getconnector
drm: Protect dev->filelist with its own mutex
drm: Make drm_vm_open/close_locked private to drm_vm.c
drm: Hide master MAP cleanup in drm_bufs.c
drm: Forbid legacy MAP functions for DRIVER_MODESET
drm: Push struct_mutex into ->master_destroy
drm: Move drm_getmap into drm_bufs.c and give it a legacy prefix
drm: Put legacy lastclose work into drm_legacy_dev_reinit
drm: Give drm_agp_clear drm_legacy_ prefix
drm/sysfs: Annote lockless show functions with READ_ONCE
MAINTAINERS: Update the files list for the GMA500 DRM driver
drm: rcar-du: Fix compilation warning
drm/i915: Get rid of intel_dp_dpcd_read_wake()
drm/dp_helper: Perform throw-away read before actual read in drm_dp_dpcd_read()
drm/dp_helper: Retry aux transactions on all errors
drm/dp_helper: Always wait before retrying native aux transactions
The driver's VDD on/off logic assumes that whenever the VDD is on we
also hold an AUX power domain reference. Since BIOS can leave the VDD on
during booting and resuming and on DDI platforms we won't take a
corresponding power reference, the above assumption won't hold on those
platforms and an eventual delayed VDD off work will do an extraneous AUX
power domain put resulting in a refcount underflow. Fix this the same
way we did this for non-DDI DP encoders:
commit 6d93c0c417 ("drm/i915: fix VDD state tracking after system
resume")
At the same time call the DP encoder suspend handler the same way as the
non-DDI DP encoders do to flush any pending VDD off work. Leaving the
work running may cause a HW access where we don't expect this (at a point
where power domains are suspended already).
While at it remove an unnecessary function call indirection.
This fixed for me AUX refcount underflow problems on BXT during
suspend/resume.
CC: Ville Syrjälä <ville.syrjala@linux.intel.com>
CC: stable@vger.kernel.org
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460963062-13211-4-git-send-email-imre.deak@intel.com
Take a bigger hammer to the underrun suppression on ILK. Instead of
trying to suppress them at specific points in the modeset sequence just
silence them across the entire sequence. This gets rid of some underruns
at least on my ILK. Note that this changes SNB and IVB to follow the
same approach just to keep the code less convoluted. The difference is
that on those platforms we won't suppress CPU underruns for port A since
it doesn't seem to be necessary.
My ILK has port A eDP and two PCH HDMI ports, so I can't be sure this is
as effective on other PCH port types. Perhaps we still need some of
Daniel's extra vblank waits [2]?
I've still been able to trigger an underrun on the other pipe, but
fixing that perhaps needs the LP1+ disable trick I implemented here [1]
which never got merged.
A few details which hamper stress testing on my ILK are that sometimes
the PCH transcoder gets messed up and refuses to shut down, and sometimes
even the panel power sequencer apparently gets stuck on the always on
position.
[1] https://lists.freedesktop.org/archives/intel-gfx/2014-March/041317.html
[2] https://lists.freedesktop.org/archives/intel-gfx/2016-January/086397.html
v2: Add a note that we also get underruns when enabling PCH ports
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v1)
Link: http://patchwork.freedesktop.org/patch/msgid/1459536799-18109-2-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
This patch checks for changes in sink count between short pulse
hpds and forces full detect when there is a change.
This will allow both detection of hotplug and unplug of panels
through dongles that give only short pulse for such events.
v2: changed variable type from u8 to bool (Jani)
return immediately if perform_full_detect is set(Siva)
v3: changed method of determining full detection from using
pointer to return code (Siva)
v4: changed comments to indicate meaning of return value of
intel_dp_short_pulse and explain the use of return value
from intel_dp_get_dpcd in intel_dp_short_pulse (Ander)
Tested-by: Nathan D Ciobanu <nathan.d.ciobanu@intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459341326-13142-5-git-send-email-shubhangi.shrivastava@intel.com
Sink count can change between short pulse hpd hence this patch
adds a member variable to intel_dp so we can track any changes
between short pulse interrupts.
This patch reads sink_count dpcd always and removes its
read operation based on values in downstream port dpcd.
SINK_COUNT dpcd is not dependent on DOWNSTREAM_PORT_PRESENT dpcd.
SINK_COUNT denotes if a display is attached, while
DOWNSTREAM_PORT_PRESET indicates how many ports are available
in the dongle where display can be attached. so it is possible
for sink count to change irrespective of value in downstream
port dpcd.
Here is a table of possible values and scenarios
sink_count downstream_port
present
0 0 no display is attached
0 1 dongle is connected without display
1 0 display connected directly
1 1 display connected through dongle
v2: Storing value of intel_dp->sink_count that is ready
for consumption. (Ander)
Squashing two commits into one. (Ander)
v3: Added comment to explain the need of early return when
sink count is 0. (Ander)
Tested-by: Nathan D Ciobanu <nathan.d.ciobanu@intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459341326-13142-4-git-send-email-shubhangi.shrivastava@intel.com
When created originally intel_dp_check_link_status()
was supposed to handle only link training for short
pulse but has grown into handler for short pulse itself.
This patch cleans up this function by splitting it into
two halves. First intel_dp_short_pulse() is called,
which will be entry point and handle all logic for
short pulse handling while intel_dp_check_link_status()
will retain its original purpose of only doing link
status related work.
intel_dp_short_pulse: All existing code other than
link status read and link training upon error status.
intel_dp_check_link_status:
The link status should be read on short pulse
irrespective of panel being enabled or not so
intel_dp_get_link_status() performs dpcd read first
then based on crtc active / enabled it will
perform the link training.
This is because short pulse is a generic interrupt
which should always be handled, because it may mean:
1. Hotplug/unplug of MST panel
2. Hotplug/unplug of dongle
3. Link status change for other DP panels
v2: Added WARN_ON to intel_dp_check_link_status()
Removed a call to intel_dp_get_link_status() (Ander)
v3: Changed commit message to explain need of link status
being read before performing encoder checks (Daniel)
v4: Changed commit message to explain need of reading
link status on short pulse (Ander)
Tested-by: Nathan D Ciobanu <nathan.d.ciobanu@intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
[anderco: fix parenthesis alignment]
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459341326-13142-3-git-send-email-shubhangi.shrivastava@intel.com
Current DP detection has DPCD operations split across
intel_dp_hpd_pulse and intel_dp_detect which contains
duplicates as well. Also intel_dp_detect is called
during modes enumeration as well which will result
in multiple dpcd operations. So this patch tries
to solve both these by bringing all DPCD operations
in one single function and make intel_dp_detect
use existing values instead of repeating same steps.
v2: Pulled in a hunk from last patch of the series to
this patch. (Ander)
v3: Added MST hotplug handling. (Ander)
v4: Added a flag to check if detect is performed to
prevent multiple detects on hotplug. (Ander)
Tested-by: Nathan D Ciobanu <nathan.d.ciobanu@intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
[anderco: fix parenthesis aligment]
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459341326-13142-2-git-send-email-shubhangi.shrivastava@intel.com
intel_dp_detect() is called for not just detection but
during modes enumeration as well. Repeating the whole
sequence during each of these calls is wasteful and
time consuming.
This patch moves probing for panel, DPCD read etc done in
intel_dp_detect() to a new function intel_dp_long_pulse().
Note that the behavior of intel_dp_detect() is changed to
report connected or disconnected depending on whether the
EDID is available or not.
This change will be required by further patches in the series
to avoid performing duplicated DPCD operations on hotplug.
v2: Moved a hunk to next patch of the series.
Moved intel_dp_unset_edid to out. (Ander)
v3: Rephrased commit message and intel_dp_unset_dp() is called
within intel_dp_set_dp() to free the previous EDID. (Ander)
v4: Added overriding of status to disconnected for MST. (Ander)
Tested-by: Nathan D Ciobanu <nathan.d.ciobanu@intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
[anderco: fix parenthesis alignment]
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459341326-13142-1-git-send-email-shubhangi.shrivastava@intel.com
Adds an (unsafe; auto-kernel-tainting) boolean module parameter to the i915
drm driver: "enable_dp_mst", which is enabled by default. Disabling the
parameter forces newly connected DisplayPort sinks to report as not
supporting multi-stream transport (MST), thus "forcing" the use of
single-stream transport (SST).
v2: rename parameter to conform to style
v3: add signoff
Signed-off-by: Nathan Schulte <nmschulte@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458054845-5837-1-git-send-email-nmschulte@gmail.com
Backmerge because:
- Maarten needs latest atomic patches from drm-misc.
- Lionel needs the color manager core patch from drm-misc.
- Ander extracted intel_dpll_mgr.c, we need a backmerge to avoid git
losing track of things too often (right now it seems ok due to
cherry-picks).
- Tvrtko needs a stable baseline to apply some large-scale renaming
patches to i915 GEM code.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
