Qualcomm Snapdragon 600 (APQ8064)

Qualcomm APQ8064
	; APQ8064 SoC in ceramic BGA capsule
Manufacturer	Qualcomm
Name	APQ8064
Architecture	armv7
GPU	Adreno 320
Year	2013
Process	28nm
Mainline	yes
Community Page	https://github.com/apq8064-mainline
Components
CPU	Works
UART	Works
Storage	Works
USB	Works
Display	Works
GPU	Broken
Pinctrl	Works
I²C	Works
SPI
Audio	Broken
Video
Thermal	Works
WiFi	Works
Bluetooth
Modem	Broken
GPS
Camera
NPU
Suspend
Ethernet

Devices

Device	Codename	Mainline
Amazon Fire TV	amazon-bueller
Asus MeMO Pad FHD 10 (ME302KL)	asus-duma
Fujitsu F-08E	fujitsu-f08e
Google (ASUS) Nexus 7 (2013) LTE	asus-deb	P
Google (ASUS) Nexus 7 (2013) WIFI	asus-flo	P
Google (LG) Nexus 4	lg-mako	P
HTC Droid DNA / Butterfly	htc-monarudo
HTC One M7	htc-m7
LG G Pad 8.3	lg-v500
LG G Pad 8.3 LTE	lg-altev
Pantech VEGA R3	pantech-ef50
Samsung Galaxy S4	samsung-jflte
Samsung Galaxy S4 Value Edition	samsung-jfvelte	P
SHARP AQUOS PHONE SERIE SHL22	sharp-shl22
Sony Xperia Z	sony-yuga	P
Xiaomi Mi 2	xiaomi-aries

4.11 kernel in best shape, since it's not LTS, doesn't have security patches
..IOMMU and DMA got broken since 4.12-rc1 [1]
4.14 somehow work +- reliably [2] [3]
4.19 some issues with wifi scanning, GPU sometimes work [4]
5.4 seems to be working, has to be enabled manually Wi-Fi which kills usb
5.10 working [5] thou there are issues with USB (must be connected at boot to get connection, when WiFi connects got lost, when connected WiFi is lost and usb still don't work)
5.13+ kernel with APQ8064 you must pass to cmdline fw_devlink=permissive
-next working! needs 5.13+ hack and currently framebuffer freeze after while

Note:

for getting GPU to work you'll need firmware.
for WiFi you need also firmware and you can enable WiFi by running echo start > /sys/class/remoteproc/remoteproc0/state

Development

LTS

I'm trying to ensure that all relevant changes get backported at least to the latest LTS (at moment of writing 5.10).

If you have device DTS which works with any of these kernels, feel free to send MR!

Check if drm/msm/adreno/a3xx is in line with latest downstream (this seems like a good reference)
Test, test test :)