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Maíra Canal c8504c0f1f drm/v3d: Enable Performance Counters before clearing them 
[ Upstream commit c98b10496b ]

On the Raspberry Pi 5, performance counters are not being cleared
when `v3d_perfmon_start()` is called, even though we write to the
CLR register. As a result, their values accumulate until they
overflow.

The expected behavior is for performance counters to reset to zero
at the start of a job. When the job finishes and the perfmon is
stopped, the counters should accurately reflect the values for that
specific job.

To ensure this behavior, the performance counters are now enabled
before being cleared. This allows the CLR register to function as
intended, zeroing the counter values when the job begins.

Fixes: 26a4dc29b7 ("drm/v3d: Expose performance counters to userspace")
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241204122831.17015-1-mcanal@igalia.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-14 19:51:31 +01:00
arch s390/entry: Mark IRQ entries to fix stack depot warnings 2024-12-14 19:51:23 +01:00
block block: fix ordering between checking BLK_MQ_S_STOPPED request adding 2024-12-14 19:51:17 +01:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: pcrypt - Call crypto layer directly when padata_do_parallel() return -EBUSY 2024-12-14 19:50:44 +01:00
Documentation dt-bindings: serial: rs485: Fix rs485-rts-delay property 2024-12-14 19:51:29 +01:00
drivers drm/v3d: Enable Performance Counters before clearing them 2024-12-14 19:51:31 +01:00
fs btrfs: don't BUG_ON on ENOMEM from btrfs_lookup_extent_info() in walk_down_proc() 2024-12-14 19:51:24 +01:00
include ALSA: pcm: Avoid reference to status->state 2024-12-14 19:51:30 +01:00
init initramfs: avoid filename buffer overrun 2024-12-14 19:50:42 +01:00
io_uring io_uring: fix possible deadlock in io_register_iowq_max_workers() 2024-11-17 15:06:25 +01:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:28:45 +01:00
kernel trace/trace_event_perf: remove duplicate samples on the first tracepoint event 2024-12-14 19:51:00 +01:00
lib lib: string_helpers: silence snprintf() output truncation warning 2024-12-14 19:51:18 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm: resolve faulty mmap_region() error path behaviour 2024-12-14 19:50:38 +01:00
net tcp_bpf: Fix the sk_mem_uncharge logic in tcp_bpf_sendmsg 2024-12-14 19:51:30 +01:00
samples bpf: Fix the xdp_adjust_tail sample prog issue 2024-12-14 19:50:54 +01:00
scripts modpost: remove incorrect code in do_eisa_entry() 2024-12-14 19:51:21 +01:00
security apparmor: test: Fix memory leak for aa_unpack_strdup() 2024-12-14 19:51:14 +01:00
sound ALSA: usb-audio: Notify xrun for low-latency mode 2024-12-14 19:51:30 +01:00
tools tools: Override makefile ARCH variable if defined, but empty 2024-12-14 19:51:30 +01:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-10-22 15:40:41 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Remove *.orig pattern from .gitignore 2024-10-17 15:11:10 +02:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS trace: Relocate event helper files 2024-04-10 16:19:24 +02:00
Makefile Linux 5.15.173 2024-11-17 15:06:26 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.