<feed xmlns='http://www.w3.org/2005/Atom'>
<title>wireguard-linux/drivers/phy, branch jd/orphan-parallel</title>
<subtitle>WireGuard for the Linux kernel</subtitle>
<id>https://git.zx2c4.com/wireguard-linux/atom/drivers/phy?h=jd%2Forphan-parallel</id>
<link rel='self' href='https://git.zx2c4.com/wireguard-linux/atom/drivers/phy?h=jd%2Forphan-parallel'/>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/'/>
<updated>2020-10-22T19:41:00Z</updated>
<entry>
<title>Merge tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci</title>
<updated>2020-10-22T19:41:00Z</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2020-10-22T19:41:00Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=00937f36b09e89c74e4a059dbb8acbf4b971d5eb'/>
<id>urn:sha1:00937f36b09e89c74e4a059dbb8acbf4b971d5eb</id>
<content type='text'>
Pull PCI updates from Bjorn Helgaas:
 "Enumeration:
   - Print IRQ number used by PCIe Link Bandwidth Notification (Dongdong
     Liu)
   - Add schedule point in pci_read_config() to reduce max latency
     (Jiang Biao)
   - Add Kconfig options for MPS/MRRS strategy (Jim Quinlan)

  Resource management:
   - Fix pci_iounmap() memory leak when !CONFIG_GENERIC_IOMAP (Lorenzo
     Pieralisi)

  PCIe native device hotplug:
   - Reduce noisiness on hot removal (Lukas Wunner)

  Power management:
   - Revert "PCI/PM: Apply D2 delay as milliseconds, not microseconds"
     that was done on the basis of spec typo (Bjorn Helgaas)
   - Rename pci_dev.d3_delay to d3hot_delay to remove D3hot/D3cold
     ambiguity (Krzysztof Wilczyński)
   - Remove unused pcibios_pm_ops (Vaibhav Gupta)

  IOMMU:
   - Enable Translation Blocking for external devices to harden against
     DMA attacks (Rajat Jain)

  Error handling:
   - Add an ACPI APEI notifier chain for vendor CPER records to enable
     device-specific error handling (Shiju Jose)

  ASPM:
   - Remove struct aspm_register_info to simplify code (Saheed O.
     Bolarinwa)

  Amlogic Meson PCIe controller driver:
   - Build as module by default (Kevin Hilman)

  Ampere Altra PCIe controller driver:
   - Add MCFG quirk to work around non-standard ECAM implementation
     (Tuan Phan)

  Broadcom iProc PCIe controller driver:
   - Set affinity mask on MSI interrupts (Mark Tomlinson)

  Broadcom STB PCIe controller driver:
   - Make PCIE_BRCMSTB depend on ARCH_BRCMSTB (Jim Quinlan)
   - Add DT bindings for more Brcmstb chips (Jim Quinlan)
   - Add bcm7278 register info (Jim Quinlan)
   - Add bcm7278 PERST# support (Jim Quinlan)
   - Add suspend and resume pm_ops (Jim Quinlan)
   - Add control of rescal reset (Jim Quinlan)
   - Set additional internal memory DMA viewport sizes (Jim Quinlan)
   - Accommodate MSI for older chips (Jim Quinlan)
   - Set bus max burst size by chip type (Jim Quinlan)
   - Add support for bcm7211, bcm7216, bcm7445, bcm7278 (Jim Quinlan)

  Freescale i.MX6 PCIe controller driver:
   - Use dev_err_probe() to reduce redundant messages (Anson Huang)

  Freescale Layerscape PCIe controller driver:
   - Enforce 4K DMA buffer alignment in endpoint test (Hou Zhiqiang)
   - Add DT compatible strings for ls1088a, ls2088a (Xiaowei Bao)
   - Add endpoint support for ls1088a, ls2088a (Xiaowei Bao)
   - Add endpoint test support for lS1088a (Xiaowei Bao)
   - Add MSI-X support for ls1088a (Xiaowei Bao)

  HiSilicon HIP PCIe controller driver:
   - Handle HIP-specific errors via ACPI APEI (Yicong Yang)

  HiSilicon Kirin PCIe controller driver:
   - Return -EPROBE_DEFER if the GPIO isn't ready (Bean Huo)

  Intel VMD host bridge driver:
   - Factor out physical offset, bus offset, IRQ domain, IRQ allocation
     (Jon Derrick)
   - Use generic PCI PM correctly (Jon Derrick)

  Marvell Aardvark PCIe controller driver:
   - Fix compilation on s390 (Pali Rohár)
   - Implement driver 'remove' function and allow to build it as module
     (Pali Rohár)
   - Move PCIe reset card code to advk_pcie_train_link() (Pali Rohár)
   - Convert mvebu a3700 internal SMCC firmware return codes to errno
     (Pali Rohár)
   - Fix initialization with old Marvell's Arm Trusted Firmware (Pali
     Rohár)

  Microsoft Hyper-V host bridge driver:
   - Fix hibernation in case interrupts are not re-created (Dexuan Cui)

  NVIDIA Tegra PCIe controller driver:
   - Stop checking return value of debugfs_create() functions (Greg
     Kroah-Hartman)
   - Convert to use DEFINE_SEQ_ATTRIBUTE macro (Liu Shixin)

  Qualcomm PCIe controller driver:
   - Reset PCIe to work around Qsdk U-Boot issue (Ansuel Smith)

  Renesas R-Car PCIe controller driver:
   - Add DT documentation for r8a774a1, r8a774b1, r8a774e1 endpoints
     (Lad Prabhakar)
   - Add RZ/G2M, RZ/G2N, RZ/G2H IDs to endpoint test (Lad Prabhakar)
   - Add DT support for r8a7742 (Lad Prabhakar)

  Socionext UniPhier Pro5 controller driver:
   - Add DT descriptions of iATU register (host and endpoint) (Kunihiko
     Hayashi)

  Synopsys DesignWare PCIe controller driver:
   - Add link up check in dw_child_pcie_ops.map_bus() (racy, but seems
     unavoidable) (Hou Zhiqiang)
   - Fix endpoint Header Type check so multi-function devices work (Hou
     Zhiqiang)
   - Skip PCIE_MSI_INTR0* programming if MSI is disabled (Jisheng Zhang)
   - Stop leaking MSI page in suspend/resume (Jisheng Zhang)
   - Add common iATU register support instead of keystone-specific code
     (Kunihiko Hayashi)
   - Major config space access and other cleanups in dwc core and
     drivers that use it (al, exynos, histb, imx6, intel-gw, keystone,
     kirin, meson, qcom, tegra) (Rob Herring)
   - Add multiple PFs support for endpoint (Xiaowei Bao)
   - Add MSI-X doorbell mode in endpoint mode (Xiaowei Bao)

  Miscellaneous:
   - Use fallthrough pseudo-keyword (Gustavo A. R. Silva)
   - Fix "0 used as NULL pointer" warnings (Gustavo Pimentel)
   - Fix "cast truncates bits from constant value" warnings (Gustavo
     Pimentel)
   - Remove redundant zeroing for sg_init_table() (Julia Lawall)
   - Use scnprintf(), not snprintf(), in sysfs "show" functions
     (Krzysztof Wilczyński)
   - Remove unused assignments (Krzysztof Wilczyński)
   - Fix "0 used as NULL pointer" warning (Krzysztof Wilczyński)
   - Simplify bool comparisons (Krzysztof Wilczyński)
   - Use for_each_child_of_node() and for_each_node_by_name() (Qinglang
     Miao)
   - Simplify return expressions (Qinglang Miao)"

* tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (147 commits)
  PCI: vmd: Update VMD PM to correctly use generic PCI PM
  PCI: vmd: Create IRQ allocation helper
  PCI: vmd: Create IRQ Domain configuration helper
  PCI: vmd: Create bus offset configuration helper
  PCI: vmd: Create physical offset helper
  PCI: v3-semi: Remove unneeded break
  PCI: dwc: Add link up check in dw_child_pcie_ops.map_bus()
  PCI/ASPM: Remove struct pcie_link_state.l1ss
  PCI/ASPM: Remove struct aspm_register_info.l1ss_cap
  PCI/ASPM: Pass L1SS Capabilities value, not struct aspm_register_info
  PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl1
  PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl2 (unused)
  PCI/ASPM: Remove struct aspm_register_info.l1ss_cap_ptr
  PCI/ASPM: Remove struct aspm_register_info.latency_encoding
  PCI/ASPM: Remove struct aspm_register_info.enabled
  PCI/ASPM: Remove struct aspm_register_info.support
  PCI/ASPM: Use 'parent' and 'child' for readability
  PCI/ASPM: Move LTR path check to where it's used
  PCI/ASPM: Move pci_clear_and_set_dword() earlier
  PCI: dwc: Fix MSI page leakage in suspend/resume
  ...
</content>
</entry>
<entry>
<title>Merge tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm</title>
<updated>2020-10-15T17:46:16Z</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2020-10-15T17:46:16Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=93b694d096cc10994c817730d4d50288f9ae3d66'/>
<id>urn:sha1:93b694d096cc10994c817730d4d50288f9ae3d66</id>
<content type='text'>
Pull drm updates from Dave Airlie:
 "Not a major amount of change, the i915 trees got split into display
  and gt trees to better facilitate higher level review, and there's a
  major refactoring of i915 GEM locking to use more core kernel concepts
  (like ww-mutexes). msm gets per-process pagetables, older AMD SI cards
  get DC support, nouveau got a bump in displayport support with common
  code extraction from i915.

  Outside of drm this contains a couple of patches for hexint
  moduleparams which you've acked, and a virtio common code tree that
  you should also get via it's regular path.

  New driver:
   - Cadence MHDP8546 DisplayPort bridge driver

  core:
   - cross-driver scatterlist cleanups
   - devm_drm conversions
   - remove drm_dev_init
   - devm_drm_dev_alloc conversion

  ttm:
   - lots of refactoring and cleanups

  bridges:
   - chained bridge support in more drivers

  panel:
   - misc new panels

  scheduler:
   - cleanup priority levels

  displayport:
   - refactor i915 code into helpers for nouveau

  i915:
   - split into display and GT trees
   - WW locking refactoring in GEM
   - execbuf2 extension mechanism
   - syncobj timeline support
   - GEN 12 HOBL display powersaving
   - Rocket Lake display additions
   - Disable FBC on Tigerlake
   - Tigerlake Type-C + DP improvements
   - Hotplug interrupt refactoring

  amdgpu:
   - Sienna Cichlid updates
   - Navy Flounder updates
   - DCE6 (SI) support for DC
   - Plane rotation enabled
   - TMZ state info ioctl
   - PCIe DPC recovery support
   - DC interrupt handling refactor
   - OLED panel fixes

  amdkfd:
   - add SMI events for thermal throttling
   - SMI interface events ioctl update
   - process eviction counters

  radeon:
   - move to dma_ for allocations
   - expose sclk via sysfs

  msm:
   - DSI support for sm8150/sm8250
   - per-process GPU pagetable support
   - Displayport support

  mediatek:
   - move HDMI phy driver to PHY
   - convert mtk-dpi to bridge API
   - disable mt2701 tmds

  tegra:
   - bridge support

  exynos:
   - misc cleanups

  vc4:
   - dual display cleanups

  ast:
   - cleanups

  gma500:
   - conversion to GPIOd API

  hisilicon:
   - misc reworks

  ingenic:
   - clock handling and format improvements

  mcde:
   - DSI support

  mgag200:
   - desktop g200 support

  mxsfb:
   - i.MX7 + i.MX8M
   - alpha plane support

  panfrost:
   - devfreq support
   - amlogic SoC support

  ps8640:
   - EDID from eDP retrieval

  tidss:
   - AM65xx YUV workaround

  virtio:
   - virtio-gpu exported resources

  rcar-du:
   - R8A7742, R8A774E1 and R8A77961 support
   - YUV planar format fixes
   - non-visible plane handling
   - VSP device reference count fix
   - Kconfig fix to avoid displaying disabled options in .config"

* tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm: (1494 commits)
  drm/ingenic: Fix bad revert
  drm/amdgpu: Fix invalid number of character '{' in amdgpu_acpi_init
  drm/amdgpu: Remove warning for virtual_display
  drm/amdgpu: kfd_initialized can be static
  drm/amd/pm: setup APU dpm clock table in SMU HW initialization
  drm/amdgpu: prevent spurious warning
  drm/amdgpu/swsmu: fix ARC build errors
  drm/amd/display: Fix OPTC_DATA_FORMAT programming
  drm/amd/display: Don't allow pstate if no support in blank
  drm/panfrost: increase readl_relaxed_poll_timeout values
  MAINTAINERS: Update entry for st7703 driver after the rename
  Revert "gpu/drm: ingenic: Add option to mmap GEM buffers cached"
  drm/amd/display: HDMI remote sink need mode validation for Linux
  drm/amd/display: Change to correct unit on audio rate
  drm/amd/display: Avoid set zero in the requested clk
  drm/amdgpu: align frag_end to covered address space
  drm/amdgpu: fix NULL pointer dereference for Renoir
  drm/vmwgfx: fix regression in thp code due to ttm init refactor.
  drm/amdgpu/swsmu: add interrupt work handler for smu11 parts
  drm/amdgpu/swsmu: add interrupt work function
  ...
</content>
</entry>
<entry>
<title>Merge 5.9-rc8 into usb-next</title>
<updated>2020-10-05T06:54:36Z</updated>
<author>
<name>Greg Kroah-Hartman</name>
<email>gregkh@linuxfoundation.org</email>
</author>
<published>2020-10-05T06:54:36Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=168ae5a74b4a9ebf0bd9c5ea7008af0b7a6ccf04'/>
<id>urn:sha1:168ae5a74b4a9ebf0bd9c5ea7008af0b7a6ccf04</id>
<content type='text'>
We need the USB fixes in here as well for testing.

Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
</entry>
<entry>
<title>phy: marvell: comphy: Convert internal SMCC firmware return codes to errno</title>
<updated>2020-10-02T13:29:41Z</updated>
<author>
<name>Pali Rohár</name>
<email>pali@kernel.org</email>
</author>
<published>2020-09-02T14:43:43Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=ea17a0f153af2cd890e4ce517130dcccaa428c13'/>
<id>urn:sha1:ea17a0f153af2cd890e4ce517130dcccaa428c13</id>
<content type='text'>
Driver -&gt;power_on and -&gt;power_off callbacks leaks internal SMCC firmware
return codes to phy caller. This patch converts SMCC error codes to
standard linux errno codes. Include file linux/arm-smccc.h already provides
defines for SMCC error codes, so use them instead of custom driver defines.
Note that return value is signed 32bit, but stored in unsigned long type
with zero padding.

Tested-by: Tomasz Maciej Nowak &lt;tmn505@gmail.com&gt;
Link: https://lore.kernel.org/r/20200902144344.16684-2-pali@kernel.org
Signed-off-by: Pali Rohár &lt;pali@kernel.org&gt;
Signed-off-by: Lorenzo Pieralisi &lt;lorenzo.pieralisi@arm.com&gt;
Reviewed-by: Rob Herring &lt;robh@kernel.org&gt;
</content>
</entry>
<entry>
<title>Merge tag 'phy-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy into usb-next</title>
<updated>2020-10-02T11:45:00Z</updated>
<author>
<name>Greg Kroah-Hartman</name>
<email>gregkh@linuxfoundation.org</email>
</author>
<published>2020-10-02T11:45:00Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=9f76e198dd523eacc90a38cef706aa9ddc12bf11'/>
<id>urn:sha1:9f76e198dd523eacc90a38cef706aa9ddc12bf11</id>
<content type='text'>
Vinod writes:

phy for 5.9

 - Core:
   - New PHY attribute for max_link_rate

 - New phy drivers:
   - Rockchip dphy driver moved from staging
   - Socionext UniPhier AHCI PHY driver
   - Intel LGM SoC USB phy
   - Intel Keem Bay eMMC PHY driver

 - Updates:
   - Support for imx8mp usb phy
   - Support for DP Phy and USB3+DP combo phy in QMP driver
   - Support for Qualcomm sc7180 DP phy
   - Support for cadence torrent PCIe and USB single linke and multilink
     configurations along with USB, SGMII/QSGMII configurations

* tag 'phy-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy: (72 commits)
  phy: qcom-qmp: initialize the pointer to NULL
  phy: qcom-qmp: Add support for sc7180 DP phy
  phy: qcom-qmp: Add support for DP in USB3+DP combo phy
  phy: qcom-qmp: Use devm_platform_ioremap_resource() to simplify
  phy: qcom-qmp: Get dp_com I/O resource by index
  phy: qcom-qmp: Move 'serdes' and 'cfg' into 'struct qcom_phy'
  phy: qcom-qmp: Remove 'initialized' in favor of 'init_count'
  phy: qcom-qmp: Move phy mode into struct qmp_phy
  dt-bindings: phy: qcom,qmp-usb3-dp: Add DP phy information
  dt-bindings: phy: ti,phy-j721e-wiz: fix bindings for torrent phy
  dt-bindings: phy: cdns,torrent-phy: add reset-names
  phy: rockchip-dphy-rx0: Include linux/delay.h
  phy: fix USB_LGM_PHY warning &amp; build errors
  phy: cadence-torrent: Add USB + SGMII/QSGMII multilink configuration
  phy: cadence-torrent: Add PCIe + USB multilink configuration
  phy: cadence-torrent: Add single link USB register sequences
  phy: cadence-torrent: Add single link SGMII/QSGMII register sequences
  phy: cadence-torrent: Configure PHY_PLL_CFG as part of link_cmn_vals
  phy: cadence-torrent: Add PHY link configuration sequences for single link
  phy: cadence-torrent: Add clk changes for multilink configuration
  ...
</content>
</entry>
<entry>
<title>phy: qcom-qmp: initialize the pointer to NULL</title>
<updated>2020-10-01T07:36:40Z</updated>
<author>
<name>Vinod Koul</name>
<email>vkoul@kernel.org</email>
</author>
<published>2020-10-01T07:09:11Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=60f5a24c11f7fa0c8c74018cfd4c25a3f432fdaf'/>
<id>urn:sha1:60f5a24c11f7fa0c8c74018cfd4c25a3f432fdaf</id>
<content type='text'>
Smatch complains:
drivers/phy/qualcomm/phy-qcom-qmp.c:3899 qcom_qmp_phy_probe() error: uninitialized symbol 'dp_cfg'.
drivers/phy/qualcomm/phy-qcom-qmp.c:3900 qcom_qmp_phy_probe() error: uninitialized symbol 'dp_serdes'.
drivers/phy/qualcomm/phy-qcom-qmp.c:3902 qcom_qmp_phy_probe() error: uninitialized symbol 'usb_cfg'.

This is a warning but not a practical one as dp_cfg, dp_serdes and
usb_cfg will be set and used when valid. So we can set the pointers to
NULL to quiesce the warnings.

Fixes: 52e013d0bffa ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy")
Reported-by: kernel test robot &lt;lkp@intel.com&gt;
Reported-by: Dan Carpenter &lt;dan.carpenter@oracle.com&gt;
Reviewed-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Link: https://lore.kernel.org/r/20201001070911.140019-1-vkoul@kernel.org
Signed-off-by: Vinod Koul &lt;vkoul@kernel.org&gt;
</content>
</entry>
<entry>
<title>Merge tag 'phy-fixes-2-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy into usb-linus</title>
<updated>2020-09-29T15:21:54Z</updated>
<author>
<name>Greg Kroah-Hartman</name>
<email>gregkh@linuxfoundation.org</email>
</author>
<published>2020-09-29T15:21:54Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=25b9e4b31ed5724b1f37a8a46fd50c6bafa6745c'/>
<id>urn:sha1:25b9e4b31ed5724b1f37a8a46fd50c6bafa6745c</id>
<content type='text'>
Vinod writes:

phy: Second round of fixes for 5.9

*) Fix of leak in TI phy driver

* tag 'phy-fixes-2-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy:
  phy: ti: am654: Fix a leak in serdes_am654_probe()
</content>
</entry>
<entry>
<title>Merge tag 'mediatek-drm-next-5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-next</title>
<updated>2020-09-29T00:26:44Z</updated>
<author>
<name>Dave Airlie</name>
<email>airlied@redhat.com</email>
</author>
<published>2020-09-29T00:23:49Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=06c14f5c2d311100a447caf60ecbcf558e4e60fe'/>
<id>urn:sha1:06c14f5c2d311100a447caf60ecbcf558e4e60fe</id>
<content type='text'>
Mediatek DRM Next for Linux 5.10

1. Move Mediatek HDMI PHY driver from DRM folder to PHY folder
2. Convert mtk-dpi to drm_bridge API
3. Disable tmds on mt2701

Signed-off-by: Dave Airlie &lt;airlied@redhat.com&gt;

From: Chun-Kuang Hu &lt;chunkuang.hu@kernel.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20200914231227.30500-1-chunkuang.hu@kernel.org
</content>
</entry>
<entry>
<title>phy: qcom-qmp: Add support for sc7180 DP phy</title>
<updated>2020-09-28T05:57:53Z</updated>
<author>
<name>Stephen Boyd</name>
<email>swboyd@chromium.org</email>
</author>
<published>2020-09-16T23:12:00Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=7612f4e2bc0e4a7dbbebafc077d220385ab63fbb'/>
<id>urn:sha1:7612f4e2bc0e4a7dbbebafc077d220385ab63fbb</id>
<content type='text'>
Add the necessary compatible strings and phy data for the sc7180 USB3+DP
combo phy.

Signed-off-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Cc: Jeykumar Sankaran &lt;jsanka@codeaurora.org&gt;
Cc: Chandan Uddaraju &lt;chandanu@codeaurora.org&gt;
Cc: Vara Reddy &lt;varar@codeaurora.org&gt;
Cc: Tanmay Shah &lt;tanmay@codeaurora.org&gt;
Cc: Bjorn Andersson &lt;bjorn.andersson@linaro.org&gt;
Cc: Manu Gautam &lt;mgautam@codeaurora.org&gt;
Cc: Sandeep Maheswaram &lt;sanm@codeaurora.org&gt;
Cc: Douglas Anderson &lt;dianders@chromium.org&gt;
Cc: Sean Paul &lt;seanpaul@chromium.org&gt;
Cc: Jonathan Marek &lt;jonathan@marek.ca&gt;
Cc: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt;
Cc: Rob Clark &lt;robdclark@chromium.org&gt;
Link: https://lore.kernel.org/r/20200609034623.10844-1-tanmay@codeaurora.org
Link: https://lore.kernel.org/r/20200916231202.3637932-9-swboyd@chromium.org
Signed-off-by: Vinod Koul &lt;vkoul@kernel.org&gt;
</content>
</entry>
<entry>
<title>phy: qcom-qmp: Add support for DP in USB3+DP combo phy</title>
<updated>2020-09-28T05:57:53Z</updated>
<author>
<name>Stephen Boyd</name>
<email>swboyd@chromium.org</email>
</author>
<published>2020-09-16T23:11:59Z</published>
<link rel='alternate' type='text/html' href='https://git.zx2c4.com/wireguard-linux/commit/?id=52e013d0bffa2238746b246074272817ec8e0807'/>
<id>urn:sha1:52e013d0bffa2238746b246074272817ec8e0807</id>
<content type='text'>
Add support for the USB3 + DisplayPort (DP) "combo" phy to the qmp phy
driver. We already have support for the USB3 part of the combo phy, so
most additions are for the DP phy.

Split up the qcom_qmp_phy{enable,disable}() functions into the phy init,
power on, power off, and exit functions that the common phy framework
expects so that the DP phy can add even more phy ops like
phy_calibrate() and phy_configure(). This allows us to initialize the DP
PHY and configure the AUX channel before powering on the PHY at the link
rate that was negotiated during link training.

The general design is as follows:

  1) DP controller calls phy_init() to initialize the PHY and configure
  the dp_com register region.

  2) DP controller calls phy_configure() to tune the link rate and
  voltage swing and pre-emphasis settings.

  3) DP controller calls phy_power_on() to enable the PLL and power on
  the phy.

  4) DP controller calls phy_configure() again to tune the voltage swing
  and pre-emphasis settings determind during link training.

  5) DP controller calls phy_calibrate() some number of times to change
  the aux settings if the aux channel times out during link training.

  6) DP controller calls phy_power_off() if the link rate is to be
  changed and goes back to step 2 to try again at a different link rate.

  5) DP controller calls phy_power_off() and then phy_exit() to power
  down the PHY when it is done.

The DP PHY contains a PLL that is different from the one used for the
USB3 PHY. Instead of a pipe clk there is a link clk and a pixel clk
output from the DP PLL after going through various dividers. Introduce
clk ops for these two clks that just tell the child clks what the
frequency of the pixel and link are. When the phy link rate is
configured we call clk_set_rate() to update the child clks in the
display clk controller on what rate is in use. The clk frequencies
always differ based on the link rate (i.e. 1.6Gb/s 2.7Gb/s, 5.4Gb/s, or
8.1Gb/s corresponding to various transmission modes like HBR1, HBR2 or
HBR3) so we simply store the link rate and use that to calculate the clk
frequencies.

The PLL enable sequence is a little different from other QMP phy PLLs so
we power on the PLL in qcom_qmp_phy_configure_dp_phy() that gets called
from phy_power_on(). This should probably be split out better so that
each phy has a way to run the final PLL/PHY enable sequence.

This code is based on a submission of this phy and PLL in the drm
subsystem.

Signed-off-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Cc: Jeykumar Sankaran &lt;jsanka@codeaurora.org&gt;
Cc: Chandan Uddaraju &lt;chandanu@codeaurora.org&gt;
Cc: Vara Reddy &lt;varar@codeaurora.org&gt;
Cc: Tanmay Shah &lt;tanmay@codeaurora.org&gt;
Cc: Bjorn Andersson &lt;bjorn.andersson@linaro.org&gt;
Cc: Manu Gautam &lt;mgautam@codeaurora.org&gt;
Cc: Sandeep Maheswaram &lt;sanm@codeaurora.org&gt;
Cc: Douglas Anderson &lt;dianders@chromium.org&gt;
Cc: Sean Paul &lt;seanpaul@chromium.org&gt;
Cc: Stephen Boyd &lt;sboyd@kernel.org&gt;
Cc: Jonathan Marek &lt;jonathan@marek.ca&gt;
Cc: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt;
Cc: Rob Clark &lt;robdclark@chromium.org&gt;
Link: https://lore.kernel.org/r/20200609034623.10844-1-tanmay@codeaurora.org
Link: https://lore.kernel.org/r/20200916231202.3637932-8-swboyd@chromium.org
Signed-off-by: Vinod Koul &lt;vkoul@kernel.org&gt;
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