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raviole: transition SystemUI to use HWC for LHBM

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This change removes direct access to the LHBM sysfs node from SystemUI,
but allows SystemUI to make binder calls to the hardware composer (HWC),
which can be used to enable or disable LHBM.

Bug: 191132545
Bug: 190563896
Bug: 184768835
Test: no avc denials
Change-Id: I5417377ff096e869ad772e4fd2fb23f8c1fd4f1e
This commit is contained in:
Ilya Matyukhin 2021-06-23 23:38:27 -07:00
parent e2ef28efca
commit 2460cdcc9f
7 changed files with 2 additions and 23 deletions
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3
display/gs101/hal_graphics_composer_default.te
View file

@ -40,6 +40,3 @@ allow hal_graphics_composer_default vendor_log_file:file create_file_perms;
# allow HWC to output to dumpstate via pipe fd
allow hal_graphics_composer_default hal_dumpstate_default:fifo_file { append write };
allow hal_graphics_composer_default hal_dumpstate_default:fd use;
# allow HWC to access LHBM sysfs
allow hal_graphics_composer_default sysfs_lhbm:file rw_file_perms;

2
tracking_denials/hal_graphics_composer_default.te
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@ -1,2 +0,0 @@
# b/191132545
dontaudit hal_graphics_composer_default sysfs_lhbm:file { read write };

3
usf/sensor_hal.te
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@ -55,6 +55,3 @@ allow hal_sensors_default fwk_stats_service:service_manager find;
# Allow access to CHRE socket to connect to nanoapps.
unix_socket_connect(hal_sensors_default, chre, chre)
# Allow sensor HAL to read lhbm.
allow hal_sensors_default sysfs_lhbm:file r_file_perms;

1
whitechapel/vendor/google/bug_map vendored
View file

@ -1,2 +1 @@
hal_graphics_composer_default sysfs_lhbm file b/190563896
permissioncontroller_app sysfs_vendor_sched file b/190671898

4
whitechapel/vendor/google/file.te vendored
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@ -184,10 +184,6 @@ type sysfs_bcmdhd, sysfs_type, fs_type;
# Video
type sysfs_video, sysfs_type, fs_type;
# TODO(b/184768835): remove this once the bug is fixed
# LHBM (Local High Brightness Mode)
type sysfs_lhbm, sysfs_type, fs_type, mlstrustedobject;
# UWB vendor
type uwb_vendor_data_file, file_type, data_file_type, app_data_file_type;

4
whitechapel/vendor/google/genfs_contexts vendored
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@ -124,10 +124,6 @@ genfscon sysfs /devices/platform/1c2d0000.drmdsim/1c2d0000.drmdsim.0/panel_extin
genfscon sysfs /devices/platform/1c2c0000.drmdsim/hs_clock u:object_r:sysfs_display:s0
genfscon sysfs /devices/platform/1c2d0000.drmdsim/hs_clock u:object_r:sysfs_display:s0
# TODO(b/184768835): remove this once the bug is fixed
# Display / LHBM (Local High Brightness Mode)
genfscon sysfs /devices/platform/1c2c0000.drmdsim/1c2c0000.drmdsim.0/backlight/panel0-backlight/local_hbm_mode u:object_r:sysfs_lhbm:s0
# Modem
genfscon sysfs /devices/platform/cp-tm1/cp_temp u:object_r:sysfs_modem:s0

8
whitechapel/vendor/google/platform_app.te vendored
View file

@ -19,9 +19,5 @@ binder_call(platform_app, twoshay)
# Fingerprint (UDFPS) GHBM/LHBM toggle
get_prop(platform_app, fingerprint_ghbm_prop)
# TODO(b/184768835): remove this once the bug is fixed
# Fingerprint (UDFPS) LHBM access
userdebug_or_eng(`
allow platform_app sysfs_leds:dir search;
allow platform_app sysfs_lhbm:file rw_file_perms;
')
allow platform_app hal_pixel_display_service:service_manager find;
binder_call(platform_app, hal_graphics_composer_default)