DisplayPort kernel driver passes error code/status to hardware composer
via the dp_hotplug_error_code sysfs file. When HWC receives/consumes
the error, it will write "0" into that file to reset the error code. So
this file must be readable and writable by the HWC code running with
"system" user/group permissions.
Previously we used to set the ownership to system:system, but in order
to be more consistent with the rest of sysfs files in that directory,
we can use root:graphics instead with permissions 0664. HWC runs
under the "graphics" group, so this should allow HWC write access.
Bug: 324953626
Test: checked permissions of dp_hotplug_error_code sysfs
Change-Id: Idf65acc12d158a78565c41f4e2aea24362e2cdff
On port-partner remove, write to drm's usbc_cable_disconnect
node if setupDisplayPortPoll() had run previously in the
connection, flagged by mPartnerSupportsDisplayPort.
Test: manual test on device
Bug: 303820069
Change-Id: I3478f2f027540972647044716a1a3e832ae1b152
Signed-off-by: RD Babiera <rdbabiera@google.com>
Adds functionality for enabling and disabling DisplayPort Alt Mode
on the port through enableUsbData in the USB HAL to comply with USB
restrictions for heightened security mode.
Test: manual test on device - use enableUsbData dumpsys command to
turn off DisplayPort and then turn it back on while connected to a
partner sink.
Bug: 297208252
Change-Id: I9f071bce802b728f2229abc08efb2204e4c2505a
Signed-off-by: RD Babiera <rdbabiera@google.com>
Indicate to the kernel that the usb gadget is pulled up
by writing to `update_sdp_enum_timeout` sysfs node. Write
to this node will inform the kernel that it can lower the SDP
timeout alarm value which is used to detect an SDP port
vs a DCP.
(ported from c5c5b127a7ed0db559d286284fe77b656bef6945)
Bug:275687235
Test: Check `update_sdp_enum_timeout` is written into after usb
gadget is pulled up. Verify that the alarm timeout lowers.
Change-Id: Id3ae7e7a20b236cec6604414a7f81860e868bdd0
Signed-off-by: Amit Sunil Dhamne <amitsd@google.com>
Monitor typec stack for irq_hpd events and signal irq_hpd when the
irq_hpd counter value read is not the same as the previously cached
value.
Bug: 278307874
Change-Id: Id4a72afcf85550cabbc2f9469bb0ccb92cd02ad2
Write pin assignment, hpd, and orientation from type-c class to
drmdp platform device attributes using epoll when displayport
driver binds to device, and determine whether or not to shut down
epoll on displayport driver change uevents.
Test: manual testing with form factor device
Bug: 260915739
Change-Id: Iec9fc76166481a4611bb2fc023aea044b497f2c0
For imporve USB stability, limit the current to 1.3A,
when connect to accessory.
Bug: 206635552
Signed-off-by: Ricky Niu <rickyniu@google.com>
Change-Id: I2c1091aa7111e6242cc949923fbc86f27e54e976
(cherry picked from commit e6cacbcff21d315763943469038c9ca8822a7f37)
