We need to make framestart_delay dynamic for DRRS on PCH
ports. To that end move it into the crtc state. As a bonus
we get state check+dump for it. Will also allow us to get
rid of the somewhat questionable framestart_delay sanitation
code.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220221110356.5532-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Since I originally wrote these comments we decided to change our
definition of framestart_delay from 0-3 to 1-4. Adjust the comments
to match that new convention. The actual code was adjusted already.
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211117183103.27418-3-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Let's adjust the vblank evasion to account for the case where
a push has already been sent. In that case the vblank exit will start
at vmin vblank start (as opposed to vmax vblank start when no push
has been sent).
This should minimize the effects of the tiny race between sampling
the frame counter vs. intel_vrr_send_push() during the previous frame.
This will also be required if we want to do mailbox style updates with
vrr since then we'd definitely do multiple commits per frame. Currently
mailbox updates are only used by the legacy cursor, but we don't do
vrr push for those.
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211117183103.27418-2-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
On XE_LPD, VRR CTL register adds a new VRR Guardband bitfield
replacing the pipeline full and deprecating the pipeline override
bit.
This patch adds this corresponding bitfield in the register defs,
crtc state vrr structure and populates this in vrr compute
config and vrr enable functions. It also adds the corresponding
HW state readout for this field.
Bspec: 50508
Cc: Aditya Swarup <aditya.swarup@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Aditya Swarup <aditya.swarup@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210526000656.3060314-3-matthew.d.roper@intel.com
Hoist the intel_de.h include from intel_display_types.h one
level up. I need this in order to untangle the include order
so that I can add tracepoints into intel_de.h.
This little cocci script did most of the work for me:
@find@
@@
(
intel_de_read(...)
|
intel_de_read_fw(...)
|
intel_de_write(...)
|
intel_de_write_fw(...)
)
@has_include@
@@
(
#include "intel_de.h"
|
#include "display/intel_de.h"
)
@depends on find && !has_include@
@@
+ #include "intel_de.h"
#include "intel_display_types.h"
@depends on find && !has_include@
@@
+ #include "display/intel_de.h"
#include "display/intel_display_types.h"
Cc: Cooper Chiou <cooper.chiou@intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
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/20210430143945.6776-1-ville.syrjala@linux.intel.com
To get sensible vblank timestamping behaviour we need to feed
the vmax based timings to the vblank code, otherwise it'll chop
off the scanline counter when it exceeds the minumum vtotal.
Additionally with VRR we have three cases to consider when we
generate the vblank timestamp:
1) we are in vertical active
-> nothing special needs to be done, just return the current
scanout position and the core will calculate the timestamp
corresponding to the past time when the current vertical
active started
2) we are in vertical blank and no push has been sent
-> the hardware will keep extending the vblank presumably
to its maximum length, so we make the timestmap match the
expected time when the max length vblank will end. Since
the timings used for this are now based on vmax nothing
special actually needs to be done
3) we are in vblank and a push has been sent so the vblank is
about to terminate
-> presumably we want the timestmap to accurately reflect
when the vblank will terminate, so we use the sampled
frame timestamp vs. current timestamp to guesstimate
how far along the vblank exit we are, and then we
adjust the reported scanout position accordingly so
that the core will see that the vblank is close to
ending.
v2:
* Fix the else if (use_scanline_Counter) (Manasi)
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-17-manasi.d.navare@intel.com
With VRR the earliest the registers can get latched are at
flipline decision boundary, calculate that as vrr_vmin_vblank_start()
and the latest the regsiters can get latched are vmax decision boundary
calculate that as vrr_vmax_vblank_start()
v2:
* Remove TODO and adjust extra scanline const (Manasi)
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-15-manasi.d.navare@intel.com
This functions gets the VRR config from the VRR registers
to match the crtc state variables for VRR.
v2:
* Rebase (Manasi)
* Use HAS_VRR (Jani N)
v3:
* Get pipeline_full, flipline (Ville)
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-14-manasi.d.navare@intel.com
This patch disables the VRR enable and VRR PUSH
bits in the HW during commit modeset disable sequence.
Thsi disable will happen when the port is disabled
or when the userspace sets VRR prop to false and
requests to disable VRR.
v2:
* Use intel_de_rmw (Jani N)
v3:
* Remove rmw (Ville)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-12-manasi.d.navare@intel.com
VRR achieves vblank stretching using the HW PUSH functionality.
So once the VRR is enabled during modeset then for each flip
request from userspace, in the atomic tail pipe_update_end()
we need to set the VRR push bit in HW for it to terminate
the vblank at configured flipline or anytime after flipline
or latest at the Vmax.
The HW clears the PUSH bit after the double buffer updates
are completed.
v2:
* Move send push to after irq en (Manasi)
* Call send push unconditionally (Jani N)
v3:
* Stall w.r.t Vrr vmax (Manasi, Gary Smith)
v4:
* Remove the rmw (Ville)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Gary Smith <gary.k.smith@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-11-manasi.d.navare@intel.com
This patch computes the VRR parameters from VRR crtc states
and configures them in VRR registers during CRTC enable in
the modeset enable sequence.
v2:
* Remove initialization to 0 (Jani N)
* Use correct pipe %c (Jani N)
v3:
* Remove debug prints (Ville)
* Use cpu_trans instead of pipe for TRANS_VRR regs (Ville)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-10-manasi.d.navare@intel.com
This forces a complete modeset if vrr drm crtc state goes
from enabled to disabled and vice versa.
This patch also computes vrr state variables from the mode timings
and based on the vrr property set by userspace as well as hardware's
vrr capability.
v2:
*Rebase
v3:
* Vmin = max (vtotal, vmin) (Manasi)
v4:
* set crtc_state->vrr.enable = 0 for disable request
v5:
* drm_dbg_kms, squash crtc states def patch (Jani N)
v6:
* Move vrr modeset check to separate function (Jani N)
v7:
* Ville's fixes - vmin, vmax rename, fix rounding dir
* Add pipeline full, flipline to crtc state
* Pass conn state to vrr_compute_config (Ville)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-6-manasi.d.navare@intel.com
This function sets the VRR property for connector based
on the platform support, EDID monitor range and DP sink
DPCD capability of outputing video without msa
timing information.
v8:
* Use HAS_VRR, remove drm_conn declaration (Jani N)
* Fix typos in Comment (Jani N)
v7:
* Move the helper to separate file (Manasi)
v6:
* Remove unset of prop
v5:
* Fix the vrr prop not being set in kernel (Manasi)
* Unset the prop on connector disconnect (Manasi)
v4:
* Rebase (Mansi)
v3:
* intel_dp_is_vrr_capable can be used for debugfs, make it
non static (Manasi)
v2:
* Just set this in intel_dp_get_modes instead of new hook (Jani)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Aditya Swarup <aditya.swarup@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210122232647.22688-2-manasi.d.navare@intel.com
We create a new file for all VRR related helpers.
Also add a function to check vrr capability based on
platform support, DPCD bits and EDID monitor range.
v2:
* Remove author (Jani N)
* Define HAS_VRR (Jani N)
* Ensure intel_dp can be obtained from conn (Jani N)
v3:
* Fix the header indent (Manasi)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210125200818.2015-1-manasi.d.navare@intel.com
