linux/drivers/dma, branch v4.5

dmaengine: at_xdmac: fix residue computation

2016-03-10T11:02:36Z

When computing the residue we need two pieces of information: the current descriptor and the remaining data of the current descriptor. To get that information, we need to read consecutively two registers but we can't do it in an atomic way. For that reason, we have to check manually that current descriptor has not changed. Signed-off-by: Ludovic Desroches Suggested-by: Cyrille Pitchen Reported-by: David Engraf Tested-by: David Engraf Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Cc: stable@vger.kernel.org #4.1 and later Signed-off-by: Vinod Koul

dmaengine: fsldma: fix memory leak

2016-03-09T06:45:22Z

adding unmap of sources and destinations while doing dequeue. Signed-off-by: Xuelin Shi Signed-off-by: Vinod Koul

dmaengine: pxa_dma: fix cyclic transfers

2016-03-03T15:36:45Z

While testing audio with pxa2xx-ac97, underrun were happening while the user application was correctly feeding the music. Debug proved that the cyclic transfer is not cyclic, ie. the last descriptor did not loop on the first. Another issue is that the descriptor length was always set to 8192, because of an trivial operator issue. This was tested on a pxa27x platform. Fixes: a57e16cf0333 ("dmaengine: pxa: add pxa dmaengine driver") Reported-by: Vasily Khoruzhick Tested-by: Vasily Khoruzhick Signed-off-by: Robert Jarzmik Signed-off-by: Vinod Koul

dmaengine: dw: disable BLOCK IRQs for non-cyclic xfer

2016-02-15T16:49:32Z

The commit 2895b2cad6e7 ("dmaengine: dw: fix cyclic transfer callbacks") re-enabled BLOCK interrupts with regard to make cyclic transfers work. However, this change becomes a regression for non-cyclic transfers as interrupt counters under stress test had been grown enormously (approximately per 4-5 bytes in the UART loop back test). Taking into consideration above enable BLOCK interrupts if and only if channel is programmed to perform cyclic transfer. Fixes: 2895b2cad6e7 ("dmaengine: dw: fix cyclic transfer callbacks") Signed-off-by: Andy Shevchenko Acked-by: Mans Rullgard Tested-by: Mans Rullgard Acked-by: Viresh Kumar Cc: Signed-off-by: Vinod Koul

dmaengine: edma: fix residue race for cyclic

2016-02-08T03:12:55Z

When retrieving the residue value, the SRC/DST fields of the active PaRAM are read to determine the current position of the DMA engine. However, the AM335x Technical Reference Manual states: 11.3.3.6 Parameter Set Updates After the TR is read from the PaRAM (and is in the process of being submitted to the EDMA3TC), the following fields are updated as needed: ... SRC DST This means SRC/DST is incremented even though the DMA transfer may not have started yet or is in progress. Thus if the reader of the residue accesses the DMA buffer too quickly, the CPU is misinformed about the data that has been successfully processed. The CCSTAT.ACTV register is a boolean that is set if any TR is being processed by either the EMDA3CC or EDMA3TC. By polling this register it is possible to ensure that the residue value returned is valid for immediate processing. However, since the DMA engine may be active, polling may never hit a moment where no TR is being processed. To handle this, the SRC/DST is also polled to see if it changes. And as a last resort, a max loop count for the busy waiting exists to avoid an infinite loop. Signed-off-by: John Ogness Acked-by: Peter Ujfalusi Signed-off-by: Vinod Koul

dmaengine: dw: pci: add ID for WildcatPoint PCH

2016-02-08T03:05:17Z

WildcatPoint PCH as seen on MacBook 12-inch (Early 2015) has PCI enabled DesignWare DMA controller. Enable it by adding its ID to the corresponding driver. Reported-by: Leif Liddy BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=110901 Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul

dmaengine: IOATDMA: fix timer code that continues to restart channels during idle

2016-01-30T16:59:03Z

The timer_event() function seems to have a bug where it ends up marking the last entry as non-responding and eventually attempts to restart the channel. This also continuously happen when idle. What needs to happen is for us to make sure there are no descriptors active and then handle that case properly. We should only hit the "cleanup" stage if there are still active descriptors. Signed-off-by: Dave Jiang Signed-off-by: Vinod Koul

Merge tag 'dmaengine-fix-4.5-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2016-01-20T18:15:21Z

Pull dmaengine fixes from Vinod Koul: "Here is my second pull request for this window: A few driver fixes have piled up and one missed rcar bindings patch which got somehow lost in for-linus branch so cherry-picked that one. Fixes are for dw, at_hdmac, edma" * tag 'dmaengine-fix-4.5-rc1' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: rcar-dmac: Document SoC specific bindings dmaengine: at_xdmac: fix resume for cyclic transfers dmaengine: dw: fix cyclic transfer callbacks dmaengine: dw: fix cyclic transfer setup dmaengine: edma: Fix paRAM slot allocation for entry channel 0

dmaengine: at_xdmac: fix resume for cyclic transfers

2016-01-18T13:37:46Z

When having cyclic transfers, the channel was paused when performing suspend but was not correctly resumed. Signed-off-by: Songjun Wu Signed-off-by: Ludovic Desroches Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Cc: # 4.1 and later Signed-off-by: Vinod Koul

Merge tag 'sound-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

2016-01-17T20:05:31Z

Pull sound updates from Takashi Iwai: "We've had quite busy weeks in this cycle. Looking at ALSA core, the significant changes are a few fixes wrt timer and sequencer ioctls that have been revealed by fuzzer recently. Other than that, ASoC core got a few updates about DAI link handling, but these are rather straightforward refactoring. In drivers scene, ASoC received quite lots of new drivers in addition to bunch of updates for still ongoing Intel Skylake support and topology API. HD-audio gained a new HDMI/DP hotplug notification via component. FireWire got a pile of code refactoring/updates with SCS.1x driver integration. More highlights are shown below. [ NOTE: this contains also many commits for DRM. This is due to the pull of drm stable branch into sound tree, as the base of i915 audio component work for HD-audio. The highlights below don't contain these DRM changes, as these are supposed to be pulled via drm tree in anyway sooner or later. ] Core: - Handful fixes to harden ALSA timer and sequencer ioctls against races reported by syzkaller fuzzer - Irq description string can be unique to each card; only for HD-audio for now ASoC: - Conversion of the array of DAI links to a list for supporting dynamically adding and removing DAI links - Topology API enhancements to make everything more component based and being able to specify PCM links via topology - Some more fixes for the topology code, though it is still not final and ready for enabling in production; we really need to get to the point where that can be done - A pile of changes for Intel SkyLake drivers which hopefully deliver some useful initial functionality for systems with this chipset, though there is more work still to come - Lots of new features and cleanups for the Renesas drivers - ANC support for WM5110 - New drivers: Imagination Technologies IPs, Atmel class D speaker, Cirrus CS47L24 and WM1831, Dialog DA7128, Realtek RT5659 and RT56156, Rockchip RK3036, TI PC3168A, and AMD ACP - Rename PCM1792a driver to be generic pcm179x HD-Audio: - Use audio component for i915 HDMI/DP hotplug handling - On-demand binding with i915 driver - bdl_pos_adj parameter adjustment for Baytrail controllers - Enable power_save_node for CX20722; this shouldn't lead to regression, hopefully - Kabylake HDMI/DP codec support - Quirks for Lenovo E50-80, Dell Latitude E-series, and other Dell machines - A few code refactoring FireWire: - Lots of code cleanup and refactoring - Integrate the support of SCS.1x devices into snd-oxfw driver; snd-scs1x driver is obsoleted USB-audio: - Fix possible NULL dereference at disconnection - A regression fix for Native Instruments devices Misc: - A few code cleanups of fm801 driver" * tag 'sound-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (722 commits) ALSA: timer: Code cleanup ALSA: timer: Harden slave timer list handling ALSA: hda - Add fixup for Dell Latitidue E6540 ALSA: timer: Fix race among timer ioctls ALSA: hda - add codec support for Kabylake display audio codec ALSA: timer: Fix double unlink of active_list ALSA: usb-audio: Fix mixer ctl regression of Native Instrument devices ALSA: hda - fix the headset mic detection problem for a Dell laptop ALSA: hda - Fix white noise on Dell Latitude E5550 ALSA: hda_intel: add card number to irq description ALSA: seq: Fix race at timer setup and close ALSA: seq: Fix missing NULL check at remove_events ioctl ALSA: usb-audio: Avoid calling usb_autopm_put_interface() at disconnect ASoC: hdac_hdmi: remove unused hdac_hdmi_query_pin_connlist ASoC: AMD: Add missing include file ALSA: hda - Fixup inverted internal mic for Lenovo E50-80 ALSA: usb: Add native DSD support for Oppo HA-1 ASoC: Make aux_dev more like a generic component ASoC: bcm2835: cleanup includes by ordering them alphabetically ASoC: AMD: Manage ACP 2.x SRAM banks power ...