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2018-07-26Merge tag 'alsa-add-snd-sgbuf-aligned-pages' of ↵Mark Brown
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-4.19 ALSA: memalloc: declare snd_sgbuf_aligned_pages() unconditionally Make this helper inline function available for all platforms. This helps solve 0-day compilation issues when CONFIG_SND_DMA_SGBUF is not defined.
2018-07-26ALSA: memalloc: declare snd_sgbuf_aligned_pages() unconditionallyPierre-Louis Bossart
Make this helper inline function available for all platforms. This helps solve 0-day compilation issues when CONFIG_SND_DMA_SGBUF is not defined. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-26IB/core: Introduce and use sgid_attr in CM requestsParav Pandit
For RoCE, when CM requests are received for RC and UD connections, netdevice of the incoming request is unavailable. Because of that CM requests are always forwarded to init_net namespace. Now that we have the GID attribute available, introduce SGID attribute in incoming CM requests and refer to the netdevice of it. This is similar to existing SGID attribute field in outgoing CM requests for RC and UD transports. Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Daniel Jurgens <danielj@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-26tracing: Remove orphaned function ftrace_nr_registered_ops()Masami Hiramatsu
Remove ftrace_nr_registered_ops() because it is no longer used. ftrace_nr_registered_ops() has been introduced by commit ea701f11da44 ("ftrace: Add selftest to test function trace recursion protection"), but its caller has been removed by commit 05cbbf643b8e ("tracing: Fix selftest function recursion accounting"). So it is not called anymore. Link: http://lkml.kernel.org/r/153260907227.12474.5234899025934963683.stgit@devbox Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-07-26srcu: Add notrace variant of srcu_dereferenceJoel Fernandes (Google)
In the last patch in this series, we are making lockdep register hooks onto the irq_{disable,enable} tracepoints. These tracepoints use the _rcuidle tracepoint variant. In this series we switch the _rcuidle tracepoint callers to use SRCU instead of sched-RCU. Inorder to dereference the pointer to the probe functions, we could call srcu_dereference, however this API will call back into lockdep to check if the lock is held *before* the lockdep probe hooks have a chance to run and annotate the IRQ enabled/disabled state. For this reason we need a notrace variant of srcu_dereference since otherwise we get lockdep splats. This patch adds the needed srcu_dereference_notrace variant. Link: http://lkml.kernel.org/r/20180628182149.226164-3-joel@joelfernandes.org Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-07-26srcu: Add notrace variants of srcu_read_{lock,unlock}Paul McKenney
This is needed for a future tracepoint patch that uses srcu, and to make sure it doesn't call into lockdep. tracepoint code already calls notrace variants for rcu_read_lock_sched so this patch does the same for srcu which will be used in a later patch. Keeps it consistent with rcu-sched. [Joel: Added commit message] Link: http://lkml.kernel.org/r/20180628182149.226164-2-joel@joelfernandes.org Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Paul McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-07-26drm: add msm compressed format modifiersJeykumar Sankaran
Qualcomm Snapdragon chipsets uses compressed format to optimize BW across multiple IP's. This change adds needed modifier support in drm for a simple 4x4 tile based compressed variants of base formats. Changes in v3: - Removed duplicate entry for DRM_FORMAT_MOD_QCOM_COMPRESSED (Rob Clark) Changes in v4: - Remove all modifiers aside from COMPRESSED, this includes tiled and 10-bit Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
2018-07-26rtc: simplify rtc_irq_set_state/rtc_irq_set_freqAlexandre Belloni
The PIE doesn't handle tasks anymore, remove the pointer from the interface. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-26rtc: remove irq_task and irq_task_lockAlexandre Belloni
There is no way to set a periodic task anymore, remove task pointer and lock. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-26rtc: remove rtc_irq_register/rtc_irq_unregisterAlexandre Belloni
The rtc_irq_* interface is not used from outside the RTC subsytem since 2016. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-26usb: gadget: uvc: Move userspace API definition to public headerLaurent Pinchart
The UVC gadget userspace API (V4L2 events and custom ioctls) is defined in a header internal to the kernel. Move it to a new public header to make it accessible to userspace. The UVC_INTF_CONTROL and UVC_INTF_STREAMING macros are not used, so remove them in the process. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-07-26cpu/hotplug: Add a cpus_read_trylock() functionWaiman Long
There are use cases where it can be useful to have a cpus_read_trylock() function to work around circular lock dependency problem involving the cpu_hotplug_lock. Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-07-26cpufreq: trace frequency limits changeRuchi Kandoi
systrace used for tracing for Android systems has carried a patch for many years in the Android tree that traces when the cpufreq limits change. With the help of this information, systrace can know when the policy limits change and can visually display the data. Lets add upstream support for the same. Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-07-26Merge tag 'samsung-drivers-exynos5440-4.19' of ↵Olof Johansson
https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into next/drivers Exynos5440 drivers removal The Exynos5440 (quad-core A15 with GMAC, PCIe, SATA) was targeting server platforms but it did not make it to the market really. There are no development boards with it and probably there are no real products neither. The development for Exynos5440 ended in 2013 and since then the platform is in maintenance mode. Removing Exynos5440 makes our life slightly easier: less maintenance, smaller code, reduced number of quirks, no need to preserve DTB backward-compatibility. The Device Tree sources and some of the drivers for Exynos5440 were already removed. This removes remaining drivers. * tag 'samsung-drivers-exynos5440-4.19' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: usb: host: exynos: Remove support for Exynos5440 clk: samsung: Remove support for Exynos5440 cpufreq: exynos: Remove support for Exynos5440 ata: ahci-platform: Remove support for Exynos5440 Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-26Merge tag 'soc-fsl-for-4.19' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux into next/drivers Various updates to soc/fsl for 4.19 Moves DPAA2 DPIO driver from staging to fsl/soc Adds multiple-pin support to QE gpio driver * tag 'soc-fsl-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux: soc: fsl: cleanup Kconfig menu soc: fsl: dpio: Convert DPIO documentation to .rst staging: fsl-mc: Remove remaining files staging: fsl-mc: Move DPIO from staging to drivers/soc/fsl staging: fsl-dpaa2: eth: move generic FD defines to DPIO soc: fsl: qe: gpio: Add qe_gpio_set_multiple Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-26Merge tag 'qcom-drivers-for-4.19' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers Qualcomm ARM Based Driver Updates for v4.19 * Add Qualcomm LLCC driver * Add Qualcomm RPMH controller * Fix memleak in Qualcomm RMTFS * Add dummy qcom_scm_assign_mem() * Fix check for global partition in SMEM * tag 'qcom-drivers-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux: soc: qcom: rmtfs-mem: fix memleak in probe error paths soc: qcom: llc-slice: Add missing MODULE_LICENSE() drivers: qcom: rpmh: fix unwanted error check for get_tcs_of_type() drivers: qcom: rpmh-rsc: fix the loop index check in get_req_from_tcs firmware: qcom: scm: add a dummy qcom_scm_assign_mem() drivers: qcom: rpmh-rsc: Check cmd_db_ready() to help children drivers: qcom: rpmh-rsc: allow active requests from wake TCS drivers: qcom: rpmh: add support for batch RPMH request drivers: qcom: rpmh: allow requests to be sent asynchronously drivers: qcom: rpmh: cache sleep/wake state requests drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS drivers: qcom: rpmh-rsc: write sleep/wake requests to TCS drivers: qcom: rpmh: add RPMH helper functions drivers: qcom: rpmh-rsc: log RPMH requests in FTRACE dt-bindings: introduce RPMH RSC bindings for Qualcomm SoCs drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs drivers: soc: Add LLCC driver dt-bindings: Documentation for qcom, llcc soc: qcom: smem: Correct check for global partition Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-25Merge tag 'amlogic-dt64-2-1' of ↵Olof Johansson
https://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic into next/dt Amlogic 64-bit DT changes for v4.19, round 2 - new SoC: S905W - new boards: based on S905W: Amlogic P281, Oranth Tanix TX3 Mini - AXG: add DT for new audio clock controller * tag 'amlogic-dt64-2-1' of https://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic: ARM64: dts: meson-gxl: add support for the Oranth Tanix TX3 Mini ARM64: dts: meson-gxl: add support for the S905W SoC and the P281 board dt-bindings: arm: amlogic: Add support for the Oranth Tanix TX3 Mini dt-bindings: arm: amlogic: Add support for GXL S905W and the P281 board dt-bindings: add vendor prefix for Shenzhen Oranth Technology Co., Ltd. ARM64: dts: meson-axg: add the audio clock controller clk: meson: expose GEN_CLK clkid clk: meson-axg: add pcie and mipi clock bindings dt-bindings: clock: add meson axg audio clock controller bindings Signed-off-by: Olof Johansson <olof@lixom.net>
2018-07-26ALSA: pcm: Add __force to cast in snd_pcm_lib_read/write()Takashi Iwai
The snd_pcm_lib_read() and snd_pcm_lib_write() inline functions have the explicit cast from a user pointer to a kernel pointer, but they lacks of __force prefix. This fixes sparse warnings like: ./include/sound/pcm.h:1093:47: warning: cast removes address space of expression Fixes: 68541213720d ("ALSA: pcm: Direct in-kernel read/write support") Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-07-25net/smc: provide fallback reason codeKarsten Graul
Remember the fallback reason code and the peer diagnosis code for smc sockets, and provide them in smc_diag.c to the netlink interface. And add more detailed reason codes. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-25rdma/cxgb4: Add support for srq functions & structsRaju Rangoju
This patch adds kernel mode t4_srq structures and support functions, uapi structures and defines, as well as firmware work request structures. Signed-off-by: Raju Rangoju <rajur@chelsio.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-25dt-bindings: clock: Add S700 support for Actions Semi Soc'sSaravanan Sekar
Add clock bindings constants for action S700 Maintain common clock dt-bindings for Actions Semi SoC's S700 and S900. Signed-off-by: Parthiban Nallathambi <pn@denx.de> Signed-off-by: Saravanan Sekar <sravanhome@gmail.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-07-25Merge tag 'samsung-pinctrl-4.19' of ↵Linus Walleij
https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/samsung into devel Samsung pinctrl drivers changes for v4.19 1. Add handling of external wakeup interrupts mask inside the pin controller driver. Existing solution is spread between the driver and machine code. The machine code writes the mask but its value is taken from pin controller driver. This moves everything into pin controller driver allowing later to remove the cross-subsystem interaction. Also this is a necessary step for implementing later Suspend to RAM on ARMv8 Exynos5433. 2. Bring necessary suspend/resume callbacks for Exynos542x and Exynos5260. 3. Document hidden requirement about one external wakeup interrupts device node. 4. Minor documentation cleanups.
2018-07-25net: phy: add helper phy_polling_modeHeiner Kallweit
Add a helper for checking whether polling is used to detect PHY status changes. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-25IB/uverbs: Fix locking around struct ib_uverbs_file ucontextJason Gunthorpe
We have a parallel unlocked reader and writer with ib_uverbs_get_context() vs everything else, and nothing guarantees this works properly. Audit and fix all of the places that access ucontext to use one of the following locking schemes: - Call ib_uverbs_get_ucontext() under SRCU and check for failure - Access the ucontext through an struct ib_uobject context member while holding a READ or WRITE lock on the uobject. This value cannot be NULL and has no race. - Hold the ucontext_lock and check for ufile->ucontext !NULL This also re-implements ib_uverbs_get_ucontext() in a way that is safe against concurrent ib_uverbs_get_context() and disassociation. As a side effect, every access to ucontext in the commands is via ib_uverbs_get_context() with an error check, or via the uobject, so there is no longer any need for the core code to check ucontext on every command call. These checks are also removed. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-25IB/uverbs: Move the FD uobj type struct file allocation to alloc_commitJason Gunthorpe
Allocating the struct file during alloc_begin creates this strange asymmetry with IDR, where the FD has two krefs pointing at it during the pre-commit phase. In particular this makes the abort process for FD very strange and confusing. For instance abort currently calls the type's destroy_object twice, and the fops release once if abort is done. This is very counter intuitive. No fops should be called until alloc_commit succeeds, and destroy_object should only ever be called once. Moving the struct file allocation to the alloc_commit is now simple, as we already support failure of rdma_alloc_commit_uobject, with all the required rollback pieces. This creates an understandable symmetry with IDR and simplifies/fixes the abort handling for FD types. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-25IB/uverbs: Always propagate errors from rdma_alloc_commit_uobject()Jason Gunthorpe
The ioctl framework already does this correctly, but the write path did not. This is trivially fixed by simply using a standard pattern to return uobj_alloc_commit() as the last statement in every function. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-25IB/uverbs: Rework the locking for cleaning up the ucontextJason Gunthorpe
The locking here has always been a bit crazy and spread out, upon some careful analysis we can simplify things. Create a single function uverbs_destroy_ufile_hw() that internally handles all locking. This pulls together pieces of this process that were sprinkled all over the places into one place, and covers them with one lock. This eliminates several duplicate/confusing locks and makes the control flow in ib_uverbs_close() and ib_uverbs_free_hw_resources() extremely simple. Unfortunately we have to keep an extra mutex, ucontext_lock. This lock is logically part of the rwsem and provides the 'down write, fail if write locked, wait if read locked' semantic we require. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-25IB/uverbs: Handle IDR and FD types without truncationJason Gunthorpe
Our ABI for write() uses a s32 for FDs and a u32 for IDRs, but internally we ended up implicitly casting these ABI values into an 'int'. For ioctl() we use a s64 for FDs and a u64 for IDRs, again casting to an int. The various casts to int are all missing range checks which can cause userspace values that should be considered invalid to be accepted. Fix this by making the generic lookup routine accept a s64, which does not truncate the write API's u32/s32 or the ioctl API's s64. Then push the detailed range checking down to the actual type implementations to be shared by both interfaces. Finally, change the copy of the uobj->id to sign extend into a s64, so eg, if we ever wish to return a negative value for a FD it is carried properly. This ensures that userspace values are never weirdly interpreted due to the various trunctations and everything that is really out of range gets an EINVAL. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-25drm/scheduler: remove sched field from the entityNayan Deshmukh
The scheduler of the entity is decided by the run queue on which it is queued. This patch avoids us the effort required to maintain a sync between rq and sched field when we start shifting entites among different rqs. Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-07-25drm/scheduler: modify API to avoid redundancyNayan Deshmukh
entity has a scheduler field and we don't need the sched argument in any of the functions where entity is provided. Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-07-25Merge branch 'nvme-4.19' of git://git.infradead.org/nvme into for-4.19/blockJens Axboe
Pull NVMe updates from Christoph: "Highlights: - massively improved tracepoints (Keith Busch) - support for larger inline data in the RDMA host and target (Steve Wise) - RDMA setup/teardown path fixes and refactor (Sagi Grimberg) - Command Supported and Effects log support for the NVMe target (Chaitanya Kulkarni) - buffered I/O support for the NVMe target (Chaitanya Kulkarni) plus the usual set of cleanups and small enhancements." * 'nvme-4.19' of git://git.infradead.org/nvme: nvmet: don't use uuid_le type nvmet: check fileio lba range access boundaries nvmet: fix file discard return status nvme-rdma: centralize admin/io queue teardown sequence nvme-rdma: centralize controller setup sequence nvme-rdma: unquiesce queues when deleting the controller nvme-rdma: mark expected switch fall-through nvme: add disk name to trace events nvme: add controller name to trace events nvme: use hw qid in trace events nvme: cache struct nvme_ctrl reference to struct nvme_request nvmet-rdma: add an error flow for post_recv failures nvmet-rdma: add unlikely check in the fast path nvmet-rdma: support max(16KB, PAGE_SIZE) inline data nvme-rdma: support up to 4 segments of inline data nvmet: add buffered I/O support for file backed ns nvmet: add commands supported and effects log page nvme: move init of keep_alive work item to controller initialization nvme.h: resync with nvme-cli
2018-07-25ring_buffer: tracing: Inherit the tracing setting to next ring bufferMasami Hiramatsu
Maintain the tracing on/off setting of the ring_buffer when switching to the trace buffer snapshot. Taking a snapshot is done by swapping the backup ring buffer (max_tr_buffer). But since the tracing on/off setting is defined by the ring buffer, when swapping it, the tracing on/off setting can also be changed. This causes a strange result like below: /sys/kernel/debug/tracing # cat tracing_on 1 /sys/kernel/debug/tracing # echo 0 > tracing_on /sys/kernel/debug/tracing # cat tracing_on 0 /sys/kernel/debug/tracing # echo 1 > snapshot /sys/kernel/debug/tracing # cat tracing_on 1 /sys/kernel/debug/tracing # echo 1 > snapshot /sys/kernel/debug/tracing # cat tracing_on 0 We don't touch tracing_on, but snapshot changes tracing_on setting each time. This is an anomaly, because user doesn't know that each "ring_buffer" stores its own tracing-enable state and the snapshot is done by swapping ring buffers. Link: http://lkml.kernel.org/r/153149929558.11274.11730609978254724394.stgit@devbox Cc: Ingo Molnar <mingo@redhat.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Tom Zanussi <tom.zanussi@linux.intel.com> Cc: Hiraku Toyooka <hiraku.toyooka@cybertrust.co.jp> Cc: stable@vger.kernel.org Fixes: debdd57f5145 ("tracing: Make a snapshot feature available from userspace") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> [ Updated commit log and comment in the code ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-07-25udlfb: allow reallocating the framebufferMikulas Patocka
This patch changes udlfb so that it may reallocate the framebuffer when setting higher-resolution mode. If we boot the system without monitor attached, udlfb creates a framebuffer with the size 800x600. This patch makes it possible to select higher videomode with the fbset command when a monitor is attached. Note that there is no reliable way to prevent the system from touching the old framebuffer, so we must not free it. We add it to the list dlfb->deferred_free and free it when the driver is unloaded. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> [b.zolnierkie: sparse fixes] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2018-07-25udlfb: set optimal write delayMikulas Patocka
The default delay 5 jiffies is too much when the kernel is compiled with HZ=100 - it results in jumpy cursor in Xwindow. In order to find out the optimal delay, I benchmarked the driver on 1280x720x30fps video. I found out that with HZ=1000, 10ms is acceptable, but with HZ=250 or HZ=300, we need 4ms, so that the video is played without any frame skips. This patch changes the delay to this value. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2018-07-25udlfb: make a local copy of fb_opsMikulas Patocka
The defio subsystem overwrites the method fb_osp->mmap. That method is stored in module's static data - and that means that if we have multiple diplaylink adapters, they will over write each other's method. In order to avoid interference between multiple adapters, we copy the fb_ops structure to a device-local memory. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2018-07-25udlfb: don't switch if we are switching to the same videomodeMikulas Patocka
The udlfb driver reprograms the hardware everytime the user switches the console, that makes quite unusable when working on the console. This patch makes the driver remember the videomode we are in and avoid reprogramming the hardware if we switch to the same videomode. We mask the "activate" field and the "FB_VMODE_SMOOTH_XPAN" flag when comparing the videomode, because they cause spurious switches when switching to and from the Xserver. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2018-07-25udlfb: fix semaphore value leakMikulas Patocka
I observed that the performance of the udl fb driver degrades over time. On a freshly booted machine, it takes 6 seconds to do "ls -la /usr/bin"; after some time of use, the same operation takes 14 seconds. The reason is that the value of "limit_sem" decays over time. The udl driver uses a semaphore "limit_set" to specify how many free urbs are there on dlfb->urbs.list. If the count is zero, the "down" operation will sleep until some urbs are added to the freelist. In order to avoid some hypothetical deadlock, the driver will not call "up" immediately, but it will offload it to a workqueue. The problem is that if we call "schedule_delayed_work" on the same work item multiple times, the work item may only be executed once. This is happening: * some urb completes * dlfb_urb_completion adds it to the free list * dlfb_urb_completion calls schedule_delayed_work to schedule the function dlfb_release_urb_work to increase the semaphore count * as the urb is on the free list, some other task grabs it and submits it * the submitted urb completes, dlfb_urb_completion is called again * dlfb_urb_completion calls schedule_delayed_work, but the work is already scheduled, so it does nothing * finally, dlfb_release_urb_work is called, it increases the semaphore count by 1, although it should increase it by 2 So, the semaphore count is decreasing over time, and this causes gradual performance degradation. Note that in the current kernel, the "up" function may be called from interrupt and it may race with the "down" function called by another thread, so we don't have to offload the call of "up" to a workqueue at all. This patch removes the workqueue code. The patch also changes "down_interruptible" to "down" in dlfb_free_urb_list, so that we will clean up the driver properly even if a signal arrives. With this patch, the performance of udlfb no longer degrades. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org [b.zolnierkie: fix immediatelly -> immediately typo] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2018-07-25media: v4l2-ctrls.h: fix v4l2_ctrl field description typosBaruch Siach
Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: v4l2-mem2mem: add v4l2_m2m_last_buf()Hans Verkuil
This can be used to mark the last queued source buffer as the last buffer. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: videodev.h: add PIX_FMT_FWHT for use with vicodecHans Verkuil
Add a new pixelformat for the vicodec software codec using the Fast Walsh Hadamard Transform. Signed-off-by: Hans Verkuil <hansverk@cisco.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: media.h: add encoder/decoder functions for codecsHans Verkuil
Add MEDIA_ENT_F_PROC_VIDEO_EN/DECODER to be used for the encoder and decoder entities of codec hardware. [mchehab+samsung@kernel.org: split description on two senteces by adding dots] Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25drm: Add support for pps and compression mode command packetvkorjani
After enabling DSC we need to send compression mode command packet and pps data packet, for which 2 new data types are added 07h Compression Mode Data Type Write , short write, 2 parameters 0Ah PPS Long Write (word count determines number of bytes) This patch adds support to send these packets. Cc: David Airlie <airlied@linux.ie> Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Cc: linux-fbdev@vger.kernel.org Changes in v3: - None Signed-off-by: vkorjani <vikas.korjani@intel.com> [seanpaul removed pps_write_buffer fn, added types to packet_format helpers] Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
2018-07-25media: media.h: reorder video en/decoder functionsHans Verkuil
Keep the function defines in numerical order: 0x6000 comes after 0x2000, so move it back. Signed-off-by: Hans Verkuil <hansverk@cisco.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: media.h: add MEDIA_ENT_F_DV_ENCODERHans Verkuil
Add a new function for digital video encoders such as HDMI transmitters. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: rename MEDIA_ENT_F_DTV_DECODER to MEDIA_ENT_F_DV_DECODERHans Verkuil
The use of 'DTV' is very confusing since it normally refers to Digital TV e.g. DVB etc. Instead use 'DV' (Digital Video), which nicely corresponds to the DV Timings API used to configure such receivers and transmitters. We keep an alias to avoid breaking userspace applications. Since this alias is only available if __KERNEL__ is *not* defined (i.e. it is only available for userspace, not kernelspace), any drivers that use it also have to be converted to the new define. These drivers are adv7604, adv7842 and tda1997x. Signed-off-by: Hans Verkuil <hansverk@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: add flags field to struct media_v2_entityHans Verkuil
The v2 entity structure never exposed the entity flags, which made it impossible to detect connector or default entities. It is really trivial to just expose this information, so implement this. Signed-off-by: Hans Verkuil <hansverk@cisco.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: add 'index' to struct media_v2_padHans Verkuil
The v2 pad structure never exposed the pad index, which made it impossible to call the MEDIA_IOC_SETUP_LINK ioctl, which needs that information. It is really trivial to just expose this information, so implement this. Signed-off-by: Hans Verkuil <hansverk@cisco.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25dma-mapping: relax warning for per-device areasRobin Murphy
The reasons why dma_free_attrs() should not be called from IRQ context are not necessarily obvious and somewhat buried in the development history, so let's start by documenting the warning itself to help anyone who does happen to hit it and wonder what the deal is. However, this check turns out to be slightly over-restrictive for the way that per-device memory has been spliced into the general API, since for that case we know that dma_declare_coherent_memory() has created an appropriate CPU mapping for the entire area and nothing dynamic should be happening. Given that the usage model for per-device memory is often more akin to streaming DMA than 'real' coherent DMA (e.g. allocating and freeing space to copy short-lived packets in and out), it is also somewhat more reasonable for those operations to happen in IRQ handlers for such devices. Therefore, let's move the irqs_disabled() check down past the per-device area hook, so that that gets a chance to resolve the request before we reach definite "you're doing it wrong" territory. Reported-by: Fredrik Noring <noring@nocrew.org> Tested-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-07-25media: cec: add support for 5V signal testingHans Verkuil
Add support for the new 5V CEC events Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-25media: uapi/linux/cec.h: add 5V eventsHans Verkuil
Add two new events to signal when the 5V line goes high or low. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
generated by cgit (git 2.34.1) at 2025-09-14 12:01:49 +0000