Linux 5.7 has not been released. While I finish this list of changes, you can take a look at the following links:
Phoronix: Linux 5.7 feature overview
or, instead, take a look at the pull requests:
1. PCI
Add support for Error Disconnect Recover (EDR, you can find EDR spec here) and _OSC based negotiation support for DPC commit, commit, commit, commit, commit, commit, commit, commit, commit
P2PDMA: Add Intel Sky Lake-E Root Ports B, C, D to the whitelist commit
mobiveil: Add PCIe Gen4 RC driver for Layerscape SoCs commit
tegra: Add support for PCIe endpoint mode in Tegra194 commit
vmd: Add two VMD Device IDs commit
2. Clock
Ingenic: Add support for TCU of X1000 commit
at91: add at91rm9200 pmc driver commit
at91: add at91sam9g45 pmc driver commit
at91: add at91sam9n12 pmc driver commit
at91: add sama5d3 pmc driver commit
imx7d: Add PXP clock commit
imx8mm: Add CLKO2 support commit
keystone: Add new driver to handle syscon based clocks commit
meson: g12a: add support for the SPICC SCLK Source clocks commit
mmp2: Add clocks for the thermal sensors commit
mmp2: Add support for PLL clock sources commit
qcom: Add modem clock controller driver for SC7180 commit
qcom: clk-alpha-pll: Add support for controlling Lucid PLLs commit
qcom: gcc: Add global clock controller driver for SM8250 commit
qcom: gpucc: Add support for GX GDSC for SC7180 commit
qcom: rpmh: Add support for RPMH clocks on SM8250 commit
si5341: Support multiple input ports commit
sprd: add clocks support for SC9863A commit
clocksource: Add driver for the Ingenic JZ47xx OST commit
clocksource: ingenic: Add support for TCU of X1000 commit
3. PHY ("physical layer" framework)
amlogic: Add Amlogic A1 USB2 PHY Driver commit
amlogic: Add Amlogic AXG MIPI/PCIE analog PHY Driver commit
amlogic: Add Amlogic AXG PCIE PHY Driver commit
qcom-qmp: Add MSM8996 UFS QMP support commit
qcom-qusb2: Add generic QUSB2 V2 PHY support commit
qcom: qmp: Add SDM845 PCIe QMP PHY support commit
qcom: qmp: Add SDM845 QHP PCIe PHY commit
qualcomm: Add Synopsys 28nm Hi-Speed USB PHY driver commit
qualcomm: usb: Add SuperSpeed PHY driver commit
tegra: xusb: Add Tegra194 support commit
tegra: xusb: Add support to get companion USB 3 port commit
tegra: xusb: Add usb-phy support commit
tegra: xusb: Add usb-role-switch support commit
ti: gmii-sel: add support for am654x/j721e soc commit
uniphier-pcie: Add legacy SoC support for Pro5 commit
uniphier-usb3hs: Add legacy SoC support for Pro5 commit
uniphier-usb3ss: Add Pro5 support commit
4. EDAC (Error Detection And Correction)
Add EDAC driver for DMC520 commit
5. Modem Host Interface (MHI) Bus
Add the MHI (Modem Host Interface) bus interface to Linux kernel. MHI is a communication protocol used by the host processors to control and communicate with modems over a high speed peripheral bus or shared memory. The MHI protocol has been designed and developed by Qualcomm Innovation Center, Inc., for use in their modems commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
6. Various
bus: ti-sysc: Add support for PRUSS SYSC type commit
counter: 104-quad-8: Support Differential Encoder Cable Status commit
counter: 104-quad-8: Support Filter Clock Prescaler commit
counter: stm32-timer-cnt: add power management support commit
eeprom: at24: add TPF0001 ACPI ID for 24c1024 device commit
extcon: axp288: Add wakeup support commit
firmware: xilinx: Add ZynqMP aes API for AES functionality commit
habanalabs: add debugfs write64/read64 commit
habanalabs: support temperature offset via sysfs commit
Add Operating State Manager (OSM) L3 interconnect provider support on SDM845 and SC7180 SoCs to handle bandwidth requests from CPU to scale L3 caches commit, commit, commit, commit, commit
interconnect: qcom: Add SC7180 interconnect provider driver commit
interconnect: qcom: Consolidate interconnect RPMh support commit
irqchip/ingenic: Add support for TCU of X1000 commit
irqchip: Add driver for Loongson I/O Local Interrupt Controller commit
irqchip: Add driver for Loongson-3 HyperTransport PIC controller commit
mailbox: imx: add SCU MU support commit
mailbox: sun6i-msgbox: Add a new mailbox driver commit
mei: me: add cedar fork device ids commit
misc: pci_endpoint_test: Add ioctl to clear IRQ commit
misc: pci_endpoint_test: Add support to get DMA option from userspace commit
ptp: Add a ptp clock driver for IDT 82P33 SMU commit
ptp: add VMware virtual PTP clock driver commit
remoteproc: updates for omap remoteproc support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
remoteproc: add IPA notification to q6v5 driver commit
7. List of Pull Requests