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2015-02-27drm/i915/skl: Allow Y (and Yf) frame buffer creationTvrtko Ursulin
By this patch all underlying bits have been implemented and this patch actually enables the feature. v2: Validate passed in fb modifiers to reject garbage. (Daniel Vetter) v3: Rearrange validation checks per code review comments. (Daniel Vetter) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> (v1) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Update watermarks for Y tilingTvrtko Ursulin
Display watermarks need different programming for different tiling modes. Set the relevant flag so this happens during the plane commit and add relevant data into a structure made available to the watermark computation code. v2: Pass in tiling info to sprite plane updates as well. v3: Rebased for plane handling changes. v4: Handle fb == NULL when plane is disabled. v5: Refactored for addfb2 interface. v6: Refactored for fb modifier changes. v7: Updated for atomic commit by only updating watermarks when tiling changes. v8: BSpec watermark calculation updates. v9: Restrict scope of y_tile_minimum variable. (Damien Lespiau) v10: Get fb from plane state otherwise we are working on old state. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Acked-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Acked-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> (v9) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Updated watermark programmingTvrtko Ursulin
Recent BSpect updates have changed the watermark calculation to avoid display flickering in some cases. v2: Fix check against DDB allocation and tidy the code a bit. (Damien Lespiau) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Adjust get_plane_config() to support Yb/Yf tilingDamien Lespiau
v2: Rebased for addfb2 interface and consolidated a bit. (Tvrtko Ursulin) v3: Rebased for fb modifier changes. (Tvrtko Ursulin) v4: Use intel_fb_stride_alignment instead of open coding. (Damien Lespiau) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Teach pin_and_fence_fb_obj() about Y tiling constraintsDamien Lespiau
1Mb! v2: Rebased for addfb2 interface. (Tvrtko Ursulin) v3: Rebased for fb modifier changes. (Tvrtko Ursulin) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Adjust intel_fb_align_height() for Yb/Yf tilingDamien Lespiau
We now need the bpp of the fb as Yf tiling has different tile widths depending on it. v2: Rebased for the new addfb2 interface. (Tvrtko Ursulin) v3: Rebased for fb modifier changes. (Tvrtko Ursulin) v4: Added missing case and 128-bit pixel warning. (Damien Lespiau) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> (v3) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Allow scanning out Y and Yf fbsDamien Lespiau
Skylake is able to scannout those tiling formats. We need to allow them in the ADDFB ioctl and tell the harware about it. v2: Rebased for addfb2 interface. (Tvrtko Ursulin) v3: Rebased for fb modifier changes. (Tvrtko Ursulin) v4: Don't allow Y tiled fbs just yet. (Tvrtko Ursulin) v5: Check for stride alignment and max pitch. (Tvrtko Ursulin) v6: Simplify maximum pitch check. (Ville Syrjälä) v7: Drop the gen9 check since requirements are no different. (Ville Syrjälä) v8: Gen2 has different X tiling stride. (Ville Syrjälä) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> (v7) Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915/skl: Add new displayable tiling formatsTvrtko Ursulin
Starting with SKL display engine can scan out Y, and newly introduced Yf tiling formats so add the latter to the frame buffer modifier space. v2: Definitions moved to drm_fourcc.h. v3: Try to document the format better. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915: Remove DRIVER_MODESET checks from modeset codeDaniel Vetter
Mostly just checks in i915-private modeset ioctls. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915: Remove regfile code&data for UMS suspend/resumeDaniel Vetter
Lots of lines to remove! Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> [danvet: Fixup makefile.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27s390/pci: unify pci_iomap symbol exportsSebastian Ott
Since commit 8cfc99b58366 ("s390: add pci_iomap_range") we use EXPORT_SYMBOL for pci_iomap but EXPORT_SYMBOL_GPL for pci_iounmap. Change the related functions to use EXPORT_SYMBOL like the asm-generic variants do. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-02-27s390/pci: fix [un]map_resources sequenceSebastian Ott
Commit 8cfc99b58366 ("s390: add pci_iomap_range") introduced counters to keep track of the number of mappings created. This revealed that we don't have our internal mappings in order when using hotunplug or resume from hibernate. This patch addresses both issues. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-02-27dm thin: fix to consistently zero-fill reads to unprovisioned blocksJoe Thornber
It was always intended that a read to an unprovisioned block will return zeroes regardless of whether the pool is in read-only or read-write mode. thin_bio_map() was inconsistent with its handling of such reads when the pool is in read-only mode, it now properly zero-fills the bios it returns in response to unprovisioned block reads. Eliminate thin_bio_map()'s special read-only mode handling of -ENODATA and just allow the IO to be deferred to the worker which will result in pool->process_bio() handling the IO (which already properly zero-fills reads to unprovisioned blocks). Reported-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
2015-02-27x86/xen: correct bug in p2m list initializationJuergen Gross
Commit 054954eb051f35e74b75a566a96fe756015352c8 ("xen: switch to linear virtual mapped sparse p2m list") introduced an error. During initialization of the p2m list a p2m identity area mapped by a complete identity pmd entry has to be split up into smaller chunks sometimes, if a non-identity pfn is introduced in this area. If this non-identity pfn is not at index 0 of a p2m page the new p2m page needed is initialized with wrong identity entries, as the identity pfns don't start with the value corresponding to index 0, but with the initial non-identity pfn. This results in weird wrong mappings. Correct the wrong initialization by starting with the correct pfn. Cc: stable@vger.kernel.org # 3.19 Reported-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Juergen Gross <jgross@suse.com> Tested-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-02-27drm/i915: Remove DRIVER_MODESET checks from gem codeDaniel Vetter
Hooray! Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915: Remove DRIVER_MODESET checks in the gpu reset codeDaniel Vetter
Again, good riddance to UMS! Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915: Remove DRIVER_MODESET checks from suspend/resume codeDaniel Vetter
UMS is dead, yay! Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27drm/i915: Remove DRIVER_MODESET checks in load/unload/close codeDaniel Vetter
UMS is gone, this is dead code. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-02-27ALSA: oxfw: fix a condition and return code in start_stream()Takashi Sakamoto
The amdtp_stream_wait_callback() doesn't return minus value and the return code is not for error code. This commit fixes with a propper condition and an error code. Fixes: f3699e2c7745 ('ALSA: oxfw: Change the way to start stream') Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Cc: <stable@vger.kernel.org> # 3.19+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-27USB: serial: cp210x: Adding Seletek device id'sMichiel vd Garde
These device ID's are not associated with the cp210x module currently, but should be. This patch allows the devices to operate upon connecting them to the usb bus as intended. Signed-off-by: Michiel van de Garde <mgparser@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2015-02-27ARC: Fix thread_saved_pc()Vineet Gupta
The old implementation assumed that SP at the time of __switch_to() is right above pt_regs which is almost certainly not the case as there will be some stack build up between entry into kernel and leading up to __switch_to Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-02-27ARC: Fix KSTK_ESP()Vineet Gupta
/proc/<pid>/maps currently don't annotate stack vma with "[stack]" This is because KSTK_ESP ie expected to return usermode SP of tsk while currently it returns the kernel mode SP of a sleeping tsk. While the fix is trivial, we also need to adjust the ARC kernel stack unwinder to not use KSTK_SP and friends any more. Cc: <stable@vger.kernel.org> Reported-and-suggested-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-02-27ARC: perf: Enable generic software eventsVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-02-27ARC: Make arc_unwind_core accessible externallyVineet Gupta
The arc unwinder can also be used for perf callchains. Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-02-27Merge branch 'drm-atmel-hlcdc-fixes' of ↵Dave Airlie
git://github.com/bbrezillon/linux-at91 into drm-fixes minor atmel hclcdc fixes. * 'drm-atmel-hlcdc-fixes' of git://github.com/bbrezillon/linux-at91: drm: atmel-hlcdc: remove clock polarity from crtc driver drm: atmel-hlcdc: remove useless pm_runtime_put_sync in probe drm: atmel-hlcdc: reset layer A2Q and UPDATE bits when disabling it
2015-02-27Merge tag 'drm-intel-fixes-2015-02-26' of ↵Dave Airlie
git://anongit.freedesktop.org/drm-intel into drm-fixes First batch of fixes for v4.0-rc, plenty of cc: stable material. * tag 'drm-intel-fixes-2015-02-26' of git://anongit.freedesktop.org/drm-intel: drm/i915: Fix frontbuffer false positve. drm/i915: Align initial plane backing objects correctly drm/i915: avoid processing spurious/shared interrupts in low-power states drm/i915: Check obj->vma_list under the struct_mutex drm/i915: Fix a use after free, and unbalanced refcounting drm/i915: Dell Chromebook 11 has PWM backlight drm/i915/skl: handle all pixel formats in skylake_update_primary_plane() drm/i915/bdw: PCI IDs ending in 0xb are ULT.
2015-02-27Merge branch 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie
into drm-fixes misc radeon fixes. * 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux: drm/radeon: only enable DP audio if the monitor supports it drm/radeon: fix atom aux payload size check for writes (v2) drm/radeon: fix 1 RB harvest config setup for TN/RL drm/radeon: enable SRBM timeout interrupt on EG/NI drm/radeon: enable SRBM timeout interrupt on SI drm/radeon: enable SRBM timeout interrupt on CIK v2 drm/radeon: dump full IB if we hit a packet error drm/radeon: disable mclk switching with 120hz+ monitors drm/radeon: use drm_mode_vrefresh() rather than mode->vrefresh drm/radeon: enable native backlight control on old macs
2015-02-26Merge tag 'hwmon-for-linus-v4.0-rc2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon fix from Guenter Roeck: "Add missing return value check to ads7828 driver" * tag 'hwmon-for-linus-v4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (ads7828) Check return value of devm_regmap_init_i2c
2015-02-27ARM: EXYNOS: Fix wrong hwirq of RTC interrupt for Exynos3250 SoCChanwoo Choi
This patch fixes wrong hwirq of RTC irq for Exynos3250 SoC. When entering suspend state, 'enable_irq_wake fail' happen because of the mismatch of RTC hwirq. [ 429.200937] Freezing user space processes ... (elapsed 0.002 seconds) done. [ 429.203383] Freezing remaining freezable tasks ... (elapsed 0.000 seconds) done. [ 429.209914] Suspending console(s) (use no_console_suspend to debug) [ 429.370685] wake enabled for irq 65 [ 429.370837] wake enabled for irq 64 [ 429.370868] wake enabled for irq 79 ... [ 429.372120] s3c-rtc 10070000.rtc: enable_irq_wake failed Fixes: a4f582f5c5fe3 (ARM: EXYNOS: Add exynos3250 suspend-to-ram support) Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: EXYNOS: Don't use LDREX and STREX after disabling cache coherencyKrzysztof Kozlowski
During CPU shutdown the exynos_cpu_power_down() is called after disabling cache coherency and it uses LDREX and STREX instructions (by calling of_machine_is_compatible() -> kobject_get() -> kref_get()). The LDREX and STREX should not be used after disabling the cache coherency so just use soc_is_exynos(). Fixes: adc548d77c22 ("ARM: EXYNOS: Use MCPM call-backs to support S2R on exynos5420") Reported-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: <stable@vger.kernel.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-26sunrpc: integer underflow in rsc_parse()Dan Carpenter
If we call groups_alloc() with invalid values then it's might lead to memory corruption. For example, with a negative value then we might not allocate enough for sizeof(struct group_info). (We're doing this in the caller for consistency with other callers of groups_alloc(). The other alternative might be to move the check out of all the callers into groups_alloc().) Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Simo Sorce <simo@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2015-02-26nfsd: fix clp->cl_revoked list deletion causing softlock in nfsdAndrew Elble
commit 2d4a532d385f ("nfsd: ensure that clp->cl_revoked list is protected by clp->cl_lock") removed the use of the reaplist to clean out clp->cl_revoked. It failed to change list_entry() to walk clp->cl_revoked.next instead of reaplist.next Fixes: 2d4a532d385f ("nfsd: ensure that clp->cl_revoked list is protected by clp->cl_lock") Cc: stable@vger.kernel.org Reported-by: Eric Meddaugh <etmsys@rit.edu> Tested-by: Eric Meddaugh <etmsys@rit.edu> Signed-off-by: Andrew Elble <aweits@rit.edu> Reviewed-by: Jeff Layton <jeff.layton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2015-02-27ARM: dts: add display power domain for exynos5250Andrzej Hajda
The patch adds domain definition and references to it in appropriate devices. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> [mszyprow: rebased onto generic power domains dt bindings] Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: add 'hdmi' clock to mixer nodes for exynos5250 and exynos5420Marek Szyprowski
Mixed block needs to control hdmi clock to properly perform power on/off operation, so add 'hdmi' clock also to mixer nodes. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: enable hdmi support for exynos4210-universal_c210Tomasz Stanislawski
This patch adds configuration of hw modules required to enable HDMI support on Universal C210 board. Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: enable hdmi support for exynos4412-odroid-commonMarek Szyprowski
This patch adds nodes specific to Exynos4412 based Odroid X/X2/U2/U3 boards required for enabling HDMI display. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: add dependency between TV and LCD0 power domains for exynos4Marek Szyprowski
TV Mixer needs both TV and LCD0 domains enabled to be fully operational. This dependency is modelled by making TV power domains a sub-domain of LCD0 power domain. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: add hdmi related nodes for exynos4 SoCsMarek Szyprowski
This patch adds entries for HDMI, Mixer and i2c with hdmi-phy modules found in Exynos 4210 and 4x12 SoCs. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: EXYNOS: add support for sub-power domainsMarek Szyprowski
This patch adds support for making one power domain a sub-domain of other domain. This is useful for modeling power dependences for devices like TV Mixer or Camera ISP, which needs to have more than one power domain enabled to be operational. Based on previous work by Amit Daniel Kachhap <amit.daniel@samsung.com>. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27dt-bindings: document a note about power domain subdomainsMarek Szyprowski
This patch adds a note on defining subdomains to generic PM domain binding documentation to let power domain providers use common approach for defining power domain hierarchy. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: Provide dt bindings identical for Exynos TMULukasz Majewski
Presented device tree bindings provide data already hardcoded in the exynos_tmu_data.c file. After this commit, it should be possible to reuse common thermal core framework in Exynos SoCs. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: Trip points and sensor configuration data for exynos5440Lukasz Majewski
This commit provides information about Exynos5440 device configuration. Previously this information was available in exynos_tmu_data.c file. Now it is available in the device tree. Such approach allows reusing some common code for thermal. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: define default thermal-zones for exynos4Lukasz Majewski
Trip points corresponding to the one defined in the exynos_tmu_data.c for Exynos4 have been included. This thermal-zones attribute is afterwards reused for Exynos4210, Exynos4412 and Exynos5250. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: default trip points definition for exynos5420Lukasz Majewski
This code groups in one place default settings of trip points. It is used in SoCs with multiple instances of TMU sensor. Separate device tree file prevents from multiple copying of the same data. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: add TMU default definitions for exynos4412Lukasz Majewski
Exynos 4 and 5 family of SoCs uses almost identical TMU sensor to measure the on chip temperature. For this reason it is possible to group TMU configuration parameters in one dts file. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: Adding CPU cooling binding for Exynos SoCsLukasz Majewski
Presented patch aims to move data necessary for correct CPU cooling device configuration from exynos_tmu_data.c to device tree. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: Enable TMU for exynos4412-odriod-commonLukasz Majewski
This commit enables TMU IP block on the Exynos4412 Odroid based devices such as Odroid U3. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: Add LDO10 for TMU for exynos4412-odroid-commonLukasz Majewski
This patch adds LDO10 regulator node for TMU. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-27ARM: dts: Enable TMU for exynos4210-tratsLukasz Majewski
The thermal IP block (Thermal Management Unit) called TMU has been enabled in this device. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-02-26mac80211: Send EAPOL frames at lowest rateJouni Malinen
The current minstrel_ht rate control behavior is somewhat optimistic in trying to find optimum TX rate. While this is usually fine for normal Data frames, there are cases where a more conservative set of retry parameters would be beneficial to make the connection more robust. EAPOL frames are critical to the authentication and especially the EAPOL-Key message 4/4 (the last message in the 4-way handshake) is important to get through to the AP. If that message is lost, the only recovery mechanism in many cases is to reassociate with the AP and start from scratch. This can often be avoided by trying to send the frame with more conservative rate and/or with more link layer retries. In most cases, minstrel_ht is currently using the initial EAPOL-Key frames for probing higher rates and this results in only five link layer transmission attempts (one at high(ish) MCS and four at MCS0). While this works with most APs, it looks like there are some deployed APs that may have issues with the EAPOL frames using HT MCS immediately after association. Similarly, there may be issues in cases where the signal strength or radio environment is not good enough to be able to get frames through even at couple of MCS 0 tries. The best approach for this would likely to be to reduce the TX rate for the last rate (3rd rate parameter in the set) to a low basic rate (say, 6 Mbps on 5 GHz and 2 or 5.5 Mbps on 2.4 GHz), but doing that cleanly requires some more effort. For now, we can start with a simple one-liner that forces the minimum rate to be used for EAPOL frames similarly how the TX rate is selected for the IEEE 802.11 Management frames. This does result in a small extra latency added to the cases where the AP would be able to receive the higher rate, but taken into account how small number of EAPOL frames are used, this is likely to be insignificant. A future optimization in the minstrel_ht design can also allow this patch to be reverted to get back to the more optimized initial TX rate. It should also be noted that many drivers that do not use minstrel as the rate control algorithm are already doing similar workarounds by forcing the lowest TX rate to be used for EAPOL frames. Cc: stable@vger.kernel.org Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Tested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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