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2020-12-03media: ccs: Remove unnecessary delays from power-up sequenceSakari Ailus
SMIA nor CCS need these delays; remove them. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Use longer pre-I²C sleep for CCS compliant devicesSakari Ailus
Longer idle period is required on I²C bus before the first transaction after lifting xshutdown. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Wrap long lines, unwrap short onesSakari Ailus
Over the years (and renaming) some lines that may well be wrapped ended up being over 80 characters, likewise there are shorter lines that can be merged. Do that. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Clean up runtime PM usageSakari Ailus
If pm_runtime_get_sync() fails, there's no need to set the device active again. Also, in the same case to return the usage_count to zero, pm_runtime_put_noidle() is enough. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Use static data read-only registersSakari Ailus
Access read-only registers from CCS static data. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Add support for manufacturer regs from sensor and module filesSakari Ailus
Write manufacturer specific registers (MSRs) from file to the sensor on sensor power-on. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Allow range in between I²C retriesSakari Ailus
Make the delay between I²C access retries a range between 1 and 2 ms. Also make the number of retries 10 instead of 5, in order not to reduce the total amount of time. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Change my e-mail addressSakari Ailus
Use my @linux.intel.com e-mail address in the CCS driver. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs-pll: Fix MODULE_LICENSESakari Ailus
Change MODULE_LICENSE to "GPL v2" as indicated by the SPDX tag. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: smiapp-pll: Rename as ccs-pllSakari Ailus
MIPI CCS replaces SMIA and SMIA++ as the current standard. CCS brings new features while existing functionality will be supported. Rename the smiapp-pll as ccs-pll accordingly. Also add Intel copyright to the files. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Read ireal numbers correctlySakari Ailus
Some limit values are available in q16.q16 format, referred to as 32-bit unsigned ireal in CCS. Read these correctly. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Move limit value real to integer conversion from read to access timeSakari Ailus
Instead of converting the limit values at register read time, do that at access time instead. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Make real to integer number conversion optionalSakari Ailus
The limit values will be raw soon, and the conversion takes place later on. Prepare for that. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Refactor register reading a littleSakari Ailus
Rework quirk and 8-bit only access functions with a single function that takes arguments. This is later extensible to support yet more flags. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Replace somewhat harsh internal checks based on BUG with WARN_ONSakari Ailus
If an internal driver error was encountered, BUG was issued. Instead, do less harsh WARN_ON_ONCE and try to manage with the consequences. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: The functions to get compose or crop rectangle never return NULLSakari Ailus
The NULL check is not needed as the functions do not return NULL. Remove the check (and BUG). Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Stop reading arrays after the first zeroSakari Ailus
The register arrays have a certain size but not all the entries will be relevant. In practice reading can be stopped after encountering a zero value in the array. Do that to avoid extra reads. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Read CCS static data from firmware binariesSakari Ailus
Read the CCS static data for sensors and modules. The files are expected to be found in "ccs" directory. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Combine revision number major and minor into oneSakari Ailus
The module revision number major and minor are both 8 bits while the sensor revision number is 16 bits. Combine the module revision into one number. This also adds printing the lowest 8 bits of the module version through the sysfs attribute. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Add CCS static data parser librarySakari Ailus
Add a parser library for parsing the CCS static data format. The library may be also compiled in user space as the format has uses also in the user space. Therefore it is dual licensed under the 3-clause BSD license as well. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03refcount: Fix a kernel-doc markupMauro Carvalho Chehab
The kernel-doc markup is wrong: it is asking the tool to document struct refcount_struct, instead of documenting typedef refcount_t. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Kees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/afb9bb1e675bf5f72a34a55d780779d7d5916b4c.1606823973.git.mchehab+huawei@kernel.org
2020-12-03completion: Drop init_completion defineMauro Carvalho Chehab
Changeset cd8084f91c02 ("locking/lockdep: Apply crossrelease to completions") added a CONFIG_LOCKDEP_COMPLETE (that was later renamed to CONFIG_LOCKDEP_COMPLETIONS). Such changeset renamed the init_completion, and add a macro that would either run a modified version or the original code. However, such code reported too many false positives. So, it ended being dropped later on by changeset e966eaeeb623 ("locking/lockdep: Remove the cross-release locking checks"). Yet, the define remained there as just: #define init_completion(x) __init_completion(x) Get rid of the define, and return __init_completion() function to its original name. Fixes: e966eaeeb623 ("locking/lockdep: Remove the cross-release locking checks") Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/e657bfc533545c185b1c3c55926a449ead56a88b.1606823973.git.mchehab+huawei@kernel.org
2020-12-03atomic: Update MAINTAINERSPeter Zijlstra
Update the files list to include refcount.h and the Documentation/ Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2020-12-03atomic: Delete obsolete documentationPeter Zijlstra
It's been superseded by Documentation/atomic_*.txt. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2020-12-03seqlock: Rename __seqprop() usersPeter Zijlstra
More consistent naming should make it easier to untangle the _Generic token pasting maze called __seqprop(). Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201110115358.GE2594@hirez.programming.kicks-ass.net
2020-12-03lockdep/selftest: Add spin_nest_lock testBoqun Feng
Add a self test case to test the behavior for the following case: lock(A); lock_nest_lock(C1, A); lock(B); lock_nest_lock(C2, A); This is a reproducer for a problem[1] reported by Chris Wilson, and is helpful to prevent this. [1]: https://lore.kernel.org/lkml/160390684819.31966.12048967113267928793@build.alporthouse.com/ Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201102053743.450459-2-boqun.feng@gmail.com
2020-12-03lockdep/selftests: Fix PROVE_RAW_LOCK_NESTINGPeter Zijlstra
The selftest nests rwlock_t inside raw_spinlock_t, this is invalid. Reported-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
2020-12-03seqlock: avoid -Wshadow warningsArnd Bergmann
When building with W=2, there is a flood of warnings about the seqlock macros shadowing local variables: 19806 linux/seqlock.h:331:11: warning: declaration of 'seq' shadows a previous local [-Wshadow] 48 linux/seqlock.h:348:11: warning: declaration of 'seq' shadows a previous local [-Wshadow] 8 linux/seqlock.h:379:11: warning: declaration of 'seq' shadows a previous local [-Wshadow] Prefix the local variables to make the warning useful elsewhere again. Fixes: 52ac39e5db51 ("seqlock: seqcount_t: Implement all read APIs as statement expressions") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201026165044.3722931-1-arnd@kernel.org
2020-12-03media: ccs: Fix obtaining bus information from firmwareSakari Ailus
Let v4l2_fwnode_endpoint_alloc_parse to figure out the type of the data bus. As the old bindings did not require the "bus-type" property, we need to rely on guessing between CSI-2 D-PHY and CCP2. Setting the type to CSI-2 D-PHY will parse just that and succeed even if no data-lanes are set. Also add a comment on the matter to the driver to avoid breaking this in the future. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Make hwcfg part of the device specific structSakari Ailus
There's no need to allocate the hardware configuration struct separately. Put it in struct ccs_sensor. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Remove remaining support for platform dataSakari Ailus
No need to support platform data; remove support for conveying hardware configuration that way. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Remove the I²C ID tableSakari Ailus
The I²C ID table is no longer needed; remove it. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Add CCS ACPI device IDSakari Ailus
The CCS compliant sensors use device ID "MIPI0200". Use this id for ACPI device matching. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Add device compatible identifiers for telling SMIA and CCS apartSakari Ailus
Add device data specific to DT compatible ID to tell SMIA and CCS devices apart already in power-up. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: ccs: Add MIPI CCS compatible stringsSakari Ailus
Add "mipi-ccs-1.0" and "mipi-ccs-1.1" compatible strings to the CCS driver. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: Documentation: ccs: Reorder SPDX and copyright notice linesSakari Ailus
Move the SPDX tag to the top, placing the copyright notice after that. This aligns the file with existing practices. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: Documentation: ccs: Rename ccs-regs.txt as ccs-regs.ascSakari Ailus
As documentation used to be in .txt files before converting to ReST, rename ccs-regs.txt to avoid it being taken as documentation that pre-dates ReST conversion and so target for further conversion to ReST. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03USB: serial: ch341: sort device-id entriesJohan Hovold
Keep the device-id entries sorted to make it easier to add new ones in the right spot. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <johan@kernel.org>
2020-12-03selftests: openat2: add RESOLVE_ conflict testAleksa Sarai
Now that we reject conflicting RESOLVE_ flags, add a selftest to avoid regressions. Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> Link: https://lore.kernel.org/r/20201027235044.5240-3-cyphar@cyphar.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-12-03openat2: reject RESOLVE_BENEATH|RESOLVE_IN_ROOTAleksa Sarai
This was an oversight in the original implementation, as it makes no sense to specify both scoping flags to the same openat2(2) invocation (before this patch, the result of such an invocation was equivalent to RESOLVE_IN_ROOT being ignored). This is a userspace-visible ABI change, but the only user of openat2(2) at the moment is LXC which doesn't specify both flags and so no userspace programs will break as a result. Fixes: fddb5d430ad9 ("open: introduce openat2(2) syscall") Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Cc: <stable@vger.kernel.org> # v5.6+ Link: https://lore.kernel.org/r/20201027235044.5240-2-cyphar@cyphar.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-12-03arm64/mm: Implement pXX_leaf_size() supportPeter Zijlstra
ARM64 has non-pagetable aligned large page support with PTE_CONT, when this bit is set the page is part of a super-page. Match the hugetlb code and support these super pages for PTE and PMD levels. This enables PERF_SAMPLE_{DATA,CODE}_PAGE_SIZE to report accurate pagetable leaf sizes. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/20201126125747.GG2414@hirez.programming.kicks-ass.net
2020-12-03perf/core: Fix arch_perf_get_page_size()Peter Zijlstra
The (new) page-table walker in arch_perf_get_page_size() is broken in various ways. Specifically while it is used in a lockless manner, it doesn't depend on CONFIG_HAVE_FAST_GUP nor uses the proper _lockless offset methods, nor is careful to only read each entry only once. Also the hugetlb support is broken due to calling pte_page() without first checking pte_special(). Rewrite the whole thing to be a proper lockless page-table walker and employ the new pXX_leaf_size() pgtable functions to determine the pagetable size without looking at the page-frames. Fixes: 51b646b2d9f8 ("perf,mm: Handle non-page-table-aligned hugetlbfs") Fixes: 8d97e71811aa ("perf/core: Add PERF_SAMPLE_DATA_PAGE_SIZE") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Kan Liang <kan.liang@linux.intel.com> Link: https://lkml.kernel.org/r/20201126124207.GM3040@hirez.programming.kicks-ass.net
2020-12-03mm: Introduce pXX_leaf_size()Peter Zijlstra
A number of architectures have non-pagetable aligned huge/large pages. For such architectures a leaf can actually be part of a larger entry. Provide generic helpers to determine the size of a page-table leaf. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Link: https://lkml.kernel.org/r/20201126121121.102580109@infradead.org
2020-12-03mm/gup: Provide gup_get_pte() more genericPeter Zijlstra
In order to write another lockless page-table walker, we need gup_get_pte() exposed. While doing that, rename it to ptep_get_lockless() to match the existing ptep_get() naming. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201126121121.036370527@infradead.org
2020-12-03USB: serial: ch341: add new Product ID for CH341AJan-Niklas Burfeind
Add PID for CH340 that's found on a ch341 based Programmer made by keeyees. The specific device that contains the serial converter is described here: http://www.keeyees.com/a/Products/ej/36.html The driver works flawlessly as soon as the new PID (0x5512) is added to it. Signed-off-by: Jan-Niklas Burfeind <kernel@aiyionpri.me> Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <johan@kernel.org>
2020-12-03perf/x86/intel: Check PEBS status correctlyStephane Eranian
The kernel cannot disambiguate when 2+ PEBS counters overflow at the same time. This is what the comment for this code suggests. However, I see the comparison is done with the unfiltered p->status which is a copy of IA32_PERF_GLOBAL_STATUS at the time of the sample. This register contains more than the PEBS counter overflow bits. It also includes many other bits which could also be set. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201126110922.317681-2-namhyung@kernel.org
2020-12-03perf/x86/intel: Fix a warning on x86_pmu_stop() with large PEBSNamhyung Kim
The commit 3966c3feca3f ("x86/perf/amd: Remove need to check "running" bit in NMI handler") introduced this. It seems x86_pmu_stop can be called recursively (like when it losts some samples) like below: x86_pmu_stop intel_pmu_disable_event (x86_pmu_disable) intel_pmu_pebs_disable intel_pmu_drain_pebs_nhm (x86_pmu_drain_pebs_buffer) x86_pmu_stop While commit 35d1ce6bec13 ("perf/x86/intel/ds: Fix x86_pmu_stop warning for large PEBS") fixed it for the normal cases, there's another path to call x86_pmu_stop() recursively when a PEBS error was detected (like two or more counters overflowed at the same time). Like in the Kan's previous fix, we can skip the interrupt accounting for large PEBS, so check the iregs which is set for PMI only. Fixes: 3966c3feca3f ("x86/perf/amd: Remove need to check "running" bit in NMI handler") Reported-by: John Sperbeck <jsperbeck@google.com> Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201126110922.317681-1-namhyung@kernel.org
2020-12-03intel_idle: Build fixPeter Zijlstra
Because CONFIG_ soup. Fixes: 6e1d2bc675bd ("intel_idle: Fix intel_idle() vs tracing") Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201130115402.GO3040@hirez.programming.kicks-ass.net
2020-12-03media: rockchip: rkisp1: remove useless debugfs checksDan Carpenter
The debugfs_create_dir() function never returns NULLs so this code will never be executed. It's not intended that callers will check for debugfs errors in the normal case and it's not necessary in this driver, so we can just delete this code. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Helen Koike <helen.koike@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-03media: stop pretending to maintain cafe and ov7670Jonathan Corbet
It's been a long time since I could credibly claim to be maintaining these drivers; I'm not even sure my hardware works anymore. Mark them orphan. Signed-off-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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