커밋 그래프

46 커밋

작성자 SHA1 메시지 날짜
Nilaan Gunabalachandran
f73f15ae39 disp: msm: sde: enable 32bit intf te registers
This change adds support for INTF TE using 32 bit values and
single update per TE. These features help ensure that during
QSync mode the TE does not overrun in certain late trigger uses.

Change-Id: I893d0cde81320c3f17604694a4d8ee52b29a9425
Signed-off-by: Nilaan Gunabalachandran <quic_ngunabal@quicinc.com>
2022-10-06 13:51:35 -07:00
Nilaan Gunabalachandran
00369e3266 disp: msm: sde: enable mdp vsync frame count
Currently, the driver uses the panel frame count along with
mdp vsync timestamp which can be unreliable if there are any
latencies. This change adds support to use mdp vsync frame
count, if the hardware supports it.

Change-Id: I784d4f4e525212269371a40071bcb912181cba9f
Signed-off-by: Nilaan Gunabalachandran <quic_ngunabal@quicinc.com>
2022-10-06 13:51:29 -07:00
Kashish Jain
082c1cfd34 disp: msm: sde: Fix data width calculation when widebus is enabled
Adjust the data width calculation to reduce the rounding off error
when the widebus is enabled.

Change-Id: Ia2fa4536ce519548989e2befcb22fb685f286c9e
Signed-off-by: Kashish Jain <quic_kashjain@quicinc.com>
2022-07-05 09:19:44 -07:00
Amine Najahi
11672b46fc disp: msm: sde: add support for display emulation on RUMI.
Add support display emulation targets on RUMI

This change does the following:
-parse dt node to enable display emulation mode.
-use sde_reg_read for pool timeout ops and debug fs dump.
-increases the kickoff timeout when emulation is enabled.
-bypass AXI halt operation when emulation is enabled.

Change-Id: Idc493964c0b8fc89f5d85fcc5755e0874a12d211
Signed-off-by: Amine Najahi <quic_anajahi@quicinc.com>
2022-06-08 15:20:46 -04:00
Jayaprakash Madisetty
a6658ee7e9 disp: msm: sde: override tearcheck rd_ptr_val when qsync is enabled
When qsync is enabled with a large threshold start window, there
is a chance that two frames can be latched by mdp HW in single
vsync window. This change overrides the tearcheck rd_ptr_val
to a value larger than the end of the Tear check start window
to ensure new frame is not latched in current vsync window.

Change-Id: I21273f0bca83747210792b911e964dfd2d50079f
Signed-off-by: Jayaprakash Madisetty <quic_jmadiset@quicinc.com>
Signed-off-by: Narendra Muppalla <quic_nmuppall@quicinc.com>
2022-06-01 11:33:01 -07:00
Linux Build Service Account
e4a2f166c3 Merge "disp: msm: sde: use INTF mdp_vsync timestamp only for video-mode" into display-kernel.lnx.5.15 2022-03-10 05:03:04 -08:00
Veera Sundaram Sankaran
0df34dcada disp: msm: sde: use INTF mdp_vsync timestamp only for video-mode
MDSS 9.0.0 added support for logging MDP_VSYNC timestamp. Use it for
video-mode panels and rely on PANEL_VSYNC timestamp for cmd-mode panels
as it relies on external panel TE.

Change-Id: I09b25d893075bee7cb2da98d4c4b4e54eb09bd6e
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>
2022-03-07 15:50:22 -08:00
Veera Sundaram Sankaran
9f41310155 disp: msm: fix WD timer load value calculation
Fix the Watchdog timer load value calculation with jitter feature.
Change the long term jitter value check to have jitter < 10.

Change-Id: If834e16d3b8fad5009642e479f529fa5b7cf2d17
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>
2022-03-07 15:29:33 -08:00
qctecmdr
9931042038 Merge "disp: msm: add support for INTF WD jitter" 2022-03-02 17:39:45 -08:00
Veera Sundaram Sankaran
e55c68138b disp: msm: sde: fix the wd-timer-ctrl config for WD TE
Avoid read/update for WD_TIMER_0_CTL2 register as the default value changed
from MDSS 9.x.x to disable clock granularity and this leads to issues with
VSYNC generation. Instead program the necessary configs directly.

Change-Id: Id545ad772480f94cf432bff8e8bfeb2b679f8aa9
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>
2022-02-25 17:00:49 -08:00
Satya Rama Aditya Pinapala
718cd25496 disp: msm: add support for INTF WD jitter
Change adds support for the INTF watchdog timer jitter feature
for MDSS 9.x.

Change-Id: I2cf821b5b5724f9adee95c282e0ec09719489a85
Signed-off-by: Satya Rama Aditya Pinapala <quic_spinapal@quicinc.com>
Signed-off-by: Narendra Muppalla <quic_nmuppall@quicinc.com>
2022-02-24 10:51:20 -08:00
GG Hou
dbf99b46c9 disp: msm: display error log signature alignment
Ensure SDE_ERROR error log print function name and line number.
Add a macro DISP_DEV_ERR as a wrapper of dev_err to ensure origin dev_err
will print function name and line number.
This would help with analysis of errors reported with automated testing.

Expected display error log format:
  [FUNCTION_NAME:line] ERROR_MESSAGE

Change-Id: I354f45b492059d5ba2bb110d56443fd338add7ad
Signed-off-by: GG Hou <quic_renjhou@quicinc.com>
2022-02-23 17:53:49 +08:00
Narendra Muppalla
daa511cb90 Merge remote-tracking branch 'quic/display-kernel.lnx.5.10' into display-kernel.lnx.5.15
* quic/display-kernel.lnx.5.10:
  disp: msm: sde: avoid error during fal10_veto override enablement
  disp: msm: update copyright description
  disp: msm: sde: configure dest_scaler op_mode for two independent displays
  disp: msm: dp: updated copyright set for 4nm target
  Revert "disp: msm: sde: consider max of actual and default prefill lines"
  disp: msm: sde: Reset backlight scale when HWC is stopped
  disp: msm: dp: avoid duplicate read of link status
  disp: msm: dsi: update vreg_ctrl settings for cape
  disp: msm: fail commit if drm_gem_obj was found attached to a sec CB
  disp: msm: dp: updated register values for 4nm target
  disp: msm: sde: update framedata event handling
  disp: msm: dsi: Add new phy comaptible string for cape
  disp: msm: sde: software override for fal10 in cwb enable
  disp: msm: update cleanup during bind failure in msm_drm_component_init
  disp: msm: sde: dump user input_fence info on spec fence timeout
  disp: msm: sde: add null pointer check for encoder current master
  disp: msm: dsi: enable DMA start window scheduling for broadcast commands
  disp: msm: sde: avoid alignment checks for linear formats
  disp: msm: reset thread priority work on every new run
  disp: msm: sde: send power on event for cont. splash
  disp: msm: sde: always set CTL_x_UIDLE_ACTIVE register to "1"
  disp: msm: use vzalloc for large allocations
  disp: msm: sde: Add support to limit DSC size to 10k
  disp: msm: sde: add tx wait during DMS for sim panel
  disp: msm: dsi: add check for any queued DSI CMDs before clock force update
  disp: msm: sde: correct pp block allocation during dcwb dither programming
  disp: msm: sde: avoid setting of max vblank count
  disp: msm: sde: add cached lut flag in sde plane
  disp: msm: sde: avoid use after free in msm_lastclose
  disp: msm: sde: update TEAR_SYNC_WRCOUNT register before vsync counter
  disp: msm: dsi: Support uncompressed rgb101010 format
  disp: msm: sde: update idle_pc_enabled flag for all encoders
  disp: msm: sde: flush esd work before disabling the encoder
  disp: msm: sde: allow qsync update along with modeset
  disp: msm: dp: avoid dp sw reset on disconnect path
  disp: msm: sde: consider max of actual and default prefill lines
  disp: msm: ensure vbif debugbus not in use is disabled
  disp: msm: sde: update cached encoder mask if required
  disp: msm: sde: while timing engine enabling poll for active region
  disp: msm: enable cache flag for dumb buffer
  disp: msm: sde: disable ot limit for cwb
  disp: msm: sde: avoid race condition at vm release
  disp: msm: dsi: set qsync min fps list length to zero
  disp: msm: sde: reset mixers in crtc when ctl datapath switches
  disp: msm: sde: update vm state atomic check for non-primary usecases
  disp: msm: sde: reset CTL_UIDLE_ACTIVE register only if uidle is disabled

Change-Id: If480e7f33743eb4788549f853ba05e744ecb38d3
Signed-off-by: Narendra Muppalla <quic_nmuppall@quicinc.com>
2022-02-08 16:38:13 -08:00
Yashwanth
374c86e91b disp: msm: sde: update TEAR_SYNC_WRCOUNT register before vsync counter
During DMS, when tear check registers are updated near
rd_ptr line count, it was resulting in a spurious
rd_ptr_irq to which frame is getting latched and causing
tearing on the screen. This change updates
TEAR_SYNC_WRCOUNT register before disabling the vsync
counter and adds a spinlock to avoid pre-emption.

Change-Id: I986dc3ce6fb3da5fed758c2f50562df44f2ab557
Signed-off-by: Yashwanth <quic_yvulapu@quicinc.com>
2021-12-20 16:30:19 +05:30
Jeykumar Sankaran
cf39b00660 Merge branch 'display-kernel.lnx.5.10' into display-kernel.lnx.1.0
Change-Id: I5d2b08380b6b0eb09492b950fb38cd9a0b3196c1
2021-12-08 12:37:35 -08:00
Jeykumar Sankaran
fe83c42f56 disp: msm: sde: add support for mdp vsync timestamp
MDSS.9.0 adds support for mdp vsync based HW timestamps
on top the existing support for panel vsync based timestamps.

This allows us to enable vsync timestamp calculations for all the
use cases including a few corner cases (e.g. programmable fetch)
which we couldn't support with the existing HW.

This change adds the new HW register support and modifies the
timestamp read logic to use mdp vsync on supporting targets.

Change-Id: I2cb1b56ca9154174331c4fc1d8f82319b6989247
Signed-off-by: Michael Ru <mru@codeaurora.org>
Signed-off-by: Jeykumar Sankaran <quic_jeykumar@quicinc.com>
2021-12-06 11:06:41 -08:00
Steve Cohen
d9794d82cd disp: msm: sde: remove sde_hw_blk
The sde_hw_blk was meant to be a generic base object for all
SDE HW blocks, however, it enforces using a common set of ops
which is not practical when blocks have different capabilities.
Since this object was never used as intended and is not doing
anything functional today, remove the dead weight.

Change-Id: If76006c1ae5c62e8d7d77b100837dbaf6c661bd3
Signed-off-by: Steve Cohen <quic_cohens@quicinc.com>
2021-10-26 11:34:59 -07:00
Steve Cohen
a683fba2e8 disp: msm: sde: use common naming for version/revision in catalog
Align the HW catalog to use common naming amongst the "revision"
and "version" structure members.

Change-Id: Ib6c81aee6cb49208b0699db4a75b4eb9dc79e800
Signed-off-by: Steve Cohen <quic_cohens@quicinc.com>
2021-10-26 11:34:59 -07:00
Dhaval Patel
511c546a52 disp: msm: sde: disable vsync counter before tear check update
Disable vsync counter before single buffer tear check
update. It allows to trigger the resolution switch
frame as posted start frame.

Change-Id: I2726372fd0e6d14ab0f79e3e3b0731a074158682
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
2021-10-15 13:59:43 -07:00
qctecmdr
d6b76d05e0 Merge "disp: msm: update DCE_DATA_COMPRESS bit in non-dsc case" 2021-05-21 07:12:14 -07:00
Raviteja Tamatam
f47184dbf0 disp: msm: update DCE_DATA_COMPRESS bit in non-dsc case
DCE_DATA_COMPRESS BIT needs to be set to 0 before
the non-dsc frame is triggered in dsc to non-dsc switch
case.

Change-Id: I311dd3f0274d7c6b0baf2328cc50b584e4560915
Signed-off-by: Raviteja Tamatam <travitej@codeaurora.org>
2021-05-10 18:20:52 +05:30
Prabhanjan Kandula
662517b142 disp: msm: sde: fix intf mux configuration
While programming intf block Mux configuration with
binding ping pong, avoid clearing split select field
as clearing this field would enable split by default.

Change-Id: Iad2fa81969bc59abba4467f29661e62c63ba19c0
Signed-off-by: Prabhanjan Kandula <pkandula@codeaurora.org>
2021-04-19 13:25:50 -07:00
Steve Cohen
cf86c94f8e disp: msm: sde: add support for AVR_STEP feature
Add AVR step support so SW can trigger a late frame and instead
of immediately triggering, HW will perform the update at the
start of the next step interval. This allows for a fixed SW
vsync timeline to be maintained in userland, eliminating the
usual drift from the actual HW vsync caused by a late frame.

This change adds AVR_STEP support via a DRM property.

Change-Id: I4cf8a296989805f134c2165a3bed0b050bb09c96
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
2021-04-04 18:40:57 -04:00
Steve Cohen
61e6723732 disp: msm: sde: report AVR_STATUS in vsync_event sysfs node
Report the AVR_STATUS which indicates if there's a pending
trigger when Adaptive Variable Refresh feature is enabled.
This allows SW to detect whether the old frame is repeated
or if the new frame was taken when the trigger is very
close to Vsync.

Change-Id: I6b04482e5c4c3bb92bad426c529c1fd3612d41c3
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
2021-03-25 22:59:46 -04:00
Vara Reddy
02a4648999 disp: msm: add support for splitlink in sde drm
Change adds support for splitlink and disables
dsc merge or 3dmerge which is not needed for splitlink.

Change-Id: I77a794d3ea6f53988f493a7af792add81abb22f0
Signed-off-by: Vara Reddy <varar@codeaurora.org>
2021-03-24 22:15:38 -07:00
Veera Sundaram Sankaran
b554f01a10 disp: msm: sde: enable support to get accurate vsync timestamp
From MDSS 8.x, vsync timestamp counter register is added in all the
interfaces. Add interface to get the vsync counter and use the global
qtmr reference counter to get the counter delta. This can be used
with reference to the curret ktime to deduce the accurate vsync
timestamp. This utility is intended to be used for setting the vblank
and retire fence timestamps which would be notified to user-mode.

Change-Id: I608a284c035cda50053eedbb311f1f54b3d3d557
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
2021-02-26 13:48:57 -08:00
Veera Sundaram Sankaran
9ad90a834d disp: msm: sde: add support for INTF line/frame count reset
From MDSS 8.x INTF line/frame counters can be reset through
a register. Reset these counters during timing engine enable /
tear-check enable to keep track of meaningful counters, which
would be useful during debugging. Additionally, reset the
counters during cont-splash modeset to track the number of
auto-refresh frames while disabling it during the first frame.

Change-Id: I66b45f5b29793df1fb4635972b1c614ad8c3b5b3
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
2021-02-26 13:48:57 -08:00
Samantha Tran
e778d2688e disp: msm: sde: add support for WD timer on INTF
Watchdog timer is moving from TOP to INTF. This change adds
support for movement and ensures backwards compatibility.

Vsync select only needs to specify whether or not to use
Timer 0 associated with the interface. It does not need to
select between Timer 0-4.

Signed-off-by: Samantha Tran <samtran@codeaurora.org>
Change-Id: I9d89a8cb1ea607e9fc0bdbffa0a6a9acceff7f13
2021-02-12 13:49:31 -08:00
Samantha Tran
262099e94a disp: msm: replace kzfree with kfree
This change replaces kzfree with kfree as kzfree has been
renamed.

While moving to the latest 5.10 tip, additional small changes
were required to resolve compilation issues:

set_dma_ops has moved from dma-mapping to dma-map-ops header.
This change includes the new header file required.

drm_panel_add returns void, this change removes the expected
return value check.

drm_prime_pages_to_sg takes an additional parameter. This change
passes in the drm_device pointer the function is looking for.

Remove an unused variable in sde_crtc vblank function.

Change-Id: I47c085c0cb64432873c2e750ae64cbdc2b5340da
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
2020-12-22 10:42:18 -08:00
Steve Cohen
d66ea6fc29 disp: msm: sde: use the correct get_status op for all INTFs
A new status register was added in DPU 5.x to INTFs to allow for
confirmation when the timing engine is disabled. This
functionality was controlled via an overloaded feature flag
which is used to enable INTF tear-check ops (also added in DPU
5.x). External displays support INTF_STATUS but have no use for
any tear-check functions. Separate these features so they can be
enabled individually on the interfaces which support them.

Change-Id: Ib8548619cb58bf19b7c02211ead7f33f52ffeae4
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
2020-08-23 21:23:18 -04:00
Steve Cohen
a4be27ac7e disp: msm: sde: report intf interrupt status during underrun
Add the INTF interrupt status register value to the underrun
line count event log to assist in debugging these issues.

Change-Id: I847cb12f8b4565d5f04667e0abda5d051a6194b2
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
2020-07-29 22:14:04 -04:00
Rajkumar Subbiah
c0d4857a81 disp: msm: sde: adjust intf timing for widebus
From Lahaina onwards, widebus is enabled for compressed DSI stream.
This change adjusts interface timing parameters to account for widebus.

Change-Id: Ie6b739ed2cdb515064e3a94404b3e0fe07755d7e
Signed-off-by: Rajkumar Subbiah <rsubbia@codeaurora.org>
2020-04-09 14:14:55 -04:00
Dhaval Patel
e7123aec1c disp: msm: sde: update autorefresh disable seq-2
Update autorefresh disable sequence-2 by avoiding
tearcheck enable configuration. Updated sequence
will trigger the frame by resetting the write
line count with tearcheck start position.

Change-Id: I984251c0cb23475f20cd5ea62122a167324d6670
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
2020-03-29 19:24:54 -07:00
Dhaval Patel
1a9e3bae54 disp: msm: sde: update autorefresh disable sequence
Autorefresh might be still in enabled state after
write_ptr reached to display height. This patch
checks the autorefresh status bit and keeps polling
the bit till autorefresh sequence is in enabled
state. It times out after 1 second if autorefresh
is still in enabled state.

Change-Id: I5d4f4cb35e5cc8c680c1878f52cee385f709d764
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
2020-03-29 19:24:42 -07:00
Narendra Muppalla
68ee65353b disp: msm: sde: align timing engine vsync based on panel vsync
This change adds logic to align timing engine vsync with panel
tear check if it is supported.

Change-Id: I3f881f392929589848c893f567822b21c0650000
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>
2020-03-11 10:14:57 -07:00
Dhaval Patel
9438f3448b disp: msm: sde: add underrun line count information
Add underrun line count information for each underrun.

Change-Id: I34a740c33240fa8d444f4bbc3b8b014b0282fca1
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
2020-02-28 11:57:47 -08:00
qctecmdr
6eab0179f2 Merge "disp: msm: sde: fix spacing of #defines" 2020-02-05 16:21:37 -08:00
Abhijit Kulkarni
7317dc417f disp: msm: sde: intf accept 64-bit compressed pixels
This change enables the interface hw block to accept
64-bit compressed pixels. This configuration is enabled based
on hw capability. For current hw, this is required any time
the compressed pixels flow through the interface block,
whereas in the previous version of DPU hw this configuration
is only required for topology using 4 way dsc merge.

Change-Id: I7bf79d035dba5084c5057022a7fa1117479e8d52
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>
2020-01-29 22:39:44 -08:00
Steve Cohen
f303123d53 disp: msm: sde: fix spacing of #defines
Defines should always have a single space between #define and
the keyword to allow for searching where these definitions are
located using grep.

Change-Id: I38778e789b12df8a7a22c22dd27152a5ab047405
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
2020-01-29 14:51:09 -08:00
Jayaprakash
985ffddc71 disp: msm: sde: add one-shot qsync mode support
Add support to enable one-shot mode during qsync
update. This feature ensures the frame drops can be
reduced due to delayed software flush for the
current commit. Also, add changes to disable the qsync
feature post commit.

Change-Id: Icb158853f52284bcf8fa641e5f62200c5460b660
Signed-off-by: Kalyan Thota <kalyant@codeaurora.org>
Signed-off-by: Jayaprakash <jmadiset@codeaurora.org>
2019-10-18 12:53:17 +05:30
Jayaprakash
ad40a300a1 disp: msm: sde: allow qsync support along with VRR
Allow Qsync and VRR features to be supported independently
by display driver. Restrict the feature availability in
same composition cycle.

Change-Id: I696eb72a2b4f9451e142ffdc5acccc8987c36b6d
Signed-off-by: Kalyan Thota <kalyant@codeaurora.org>
Signed-off-by: Jayaprakash <jmadiset@codeaurora.org>
2019-10-17 17:07:33 +05:30
Dhaval Patel
bcd97aa368 disp: msm: sde: fix cwb, dp and wb tear down sequence
CWB, DP and WB displays tear down sequence must reset
3d_merge, ctl, pingpong_binding, etc. MDP HW
blocks. This change fixes the tear down
sequence register programming. It also moves flush
sw reset before encoder_disable call. That allows
CWB tear down to update the flush configuration
on primary ctl path.

Change-Id: I21c521b39456af4144cf836c65d46a25c985f51d
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
2019-07-18 14:13:33 -07:00
Nilaan Gunabalachandran
c6092f3e66 disp: msm: sde: log intf framecount in event logs
Log hardware interface framecount during te and vblank irqs for
command and video mode panels, respectively. This will help in
debugging any missed frames.

Change-Id: Ie86f686c4cc12de6a1f31aa47d4c7a5b8a68ea55
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>
2019-06-26 11:54:51 -04:00
Samantha Tran
1ab07a4d7c disp: msm: add changes missing during snapshots
This change ports the missing changes from 4.14 to 4.19
that were missed. It includes changes up until
commit 0f8fb25421ff ("cnss2: Add device version to
SOC info structure").

Change-Id: Idfdfe891f146e389e3c65cc3fc4c98d93220e789
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
2019-06-03 09:07:38 -07:00
Veera Sundaram Sankaran
6daf1c58e7 disp: msm: sde: use wr_ptr interrupt instead of ctl_start
SDE driver triggers the frame and waits for the
ctl_start interrupt for command mode display. This interrupt
provides confirmation that hardware has picked up the
frame. Retire fence signaling is associated with
this interrupt and it is sent at the rd_ptr interrupt
after ctl_start. Due to lut dma delay, ctl_start interrupt
may be trigger before rd_ptr or after rd_ptr. SW manages
this complexity and handle retire fence for different cases
with 500us threshold logic.

This change replaces the ctl_start interrupt with wr_ptr
interrupt by programming it to trigger at 1st write line
count. This is guaranteed to come every time and it is close
to rd_ptr interrupt. That allows retire fence trigger at
wr_ptr interrupt and simplifies the SW logic. CRTC commit
thread would be held slightly longer with this change
as the wr_ptr is always close to rd_ptr and after
ctl_start.

Change-Id: Ic47a8f82c854b4aded0d70c95af853b28a68ffd6
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
2019-05-23 10:29:30 -07:00
Narendra Muppalla
3709853456 Display drivers kernel project initial snapshot
This change brings msm display driver including sde,
dp, dsi, rotator, dsi pll and dp pll from base 4.19 kernel
project. It is first source code snapshot from base kernel project.

Change-Id: Iec864c064ce5ea04e170f24414c728684002f284
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>
2019-04-14 22:20:59 -07:00