Kernel Panic?

[aodesigns]

So I left my 2015 rMBP left to sleep for a few hours, whilst connected to my P2415Q, which went into sleep mode also.

When I came back and started up again, the system crashed. What caused this? I had Spotify and safari open whilst in sleep mode.

Heres the panic report:

Sun May 3 20:34:10 2015

*** Panic Report ***
panic(cpu 3 caller 0xffffff8004017cc2): Kernel trap at 0xffffff7f85fe8b06, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff89a209afe8, CR3: 0x000000044c209031, CR4: 0x00000000003627e0
RAX: 0x00000000ffffffff, RBX: 0x00000000e00002bc, RCX: 0xffffff7f8600d154, RDX: 0xffffff802e68c600
RSP: 0xffffff81ee6e3820, RBP: 0xffffff81ee6e3820, RSI: 0x00000000ffffffff, RDI: 0xffffff81a2099000
R8: 0xffffff802e68c600, R9: 0xffffff81ee6e39d0, R10: 0xffffff7f84ffe950, R11: 0xffffff81ee6e3b80
R12: 0xffffff81a2099000, R13: 0xffffff802f5aa2b4, R14: 0xffffff802e68c600, R15: 0x0000000000000002
RFL: 0x0000000000010297, RIP: 0xffffff7f85fe8b06, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0xffffff89a209afe8, Error code: 0x0000000000000000, Fault CPU: 0x3

Backtrace (CPU 3), Frame : Return Address
0xffffff81ee6e34d0 : 0xffffff8003f2bda1
0xffffff81ee6e3550 : 0xffffff8004017cc2
0xffffff81ee6e3710 : 0xffffff8004034b73
0xffffff81ee6e3730 : 0xffffff7f85fe8b06
0xffffff81ee6e3820 : 0xffffff7f85ff98f0
0xffffff81ee6e3860 : 0xffffff7f8600d164
0xffffff81ee6e38b0 : 0xffffff7f8600d39d
0xffffff81ee6e38d0 : 0xffffff80044d41ce
0xffffff81ee6e3910 : 0xffffff7f8600d408
0xffffff81ee6e3960 : 0xffffff7f85fc3d74
0xffffff81ee6e3980 : 0xffffff7f85fc3eb1
0xffffff81ee6e3a00 : 0xffffff7f864155c9
0xffffff81ee6e3a60 : 0xffffff80044d41ce
0xffffff81ee6e3aa0 : 0xffffff7f864159d8
0xffffff81ee6e3af0 : 0xffffff7f85fc3eb1
0xffffff81ee6e3b70 : 0xffffff7f85fc384e
0xffffff81ee6e3bc0 : 0xffffff80044ff0c3
0xffffff81ee6e3d00 : 0xffffff8003fe21e7
0xffffff81ee6e3e10 : 0xffffff8003f3000c
0xffffff81ee6e3e40 : 0xffffff8003f149f3
0xffffff81ee6e3e90 : 0xffffff8003f2531d
0xffffff81ee6e3f10 : 0xffffff80040031ea
0xffffff81ee6e3fb0 : 0xffffff8004035396
Kernel Extensions in backtrace:
com.apple.AppleGraphicsDeviceControl(3.10.22)[44D7223C-9628-3FEA-A3B8-27DE9E1CE0C3]@0xffffff7f85fc3000->0xffffff7f85fc8fff
com.apple.driver.AppleIntelBDWGraphicsFramebuffer(10.0.6)[BD924979-4EEE-345B-95A3-59BC631819CD]@0xffffff7f85fc9000->0xffffff7f8601cfff
dependency: com.apple.iokit.IOPCIFamily(2.9)[52E715FC-521D-3869-B2EA-5228FA4BEA34]@0xffffff7f84724000
dependency: com.apple.iokit.IOACPIFamily(1.4)[70E2B65E-A91A-3522-A1A0-79FD63EABB4C]@0xffffff7f84f41000
dependency: com.apple.iokit.IOAcceleratorFamily2(156.14)[BE7D765B-49C1-34F9-B75E-3EAF8A4062A3]@0xffffff7f85f46000
dependency: com.apple.iokit.IOReportFamily(31)[781C9DD1-4CE9-3AEB-85EA-D420CEC18916]@0xffffff7f84f3a000
dependency: com.apple.AppleGraphicsDeviceControl(3.10.22)[44D7223C-9628-3FEA-A3B8-27DE9E1CE0C3]@0xffffff7f85fc3000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[82EAD591-67E3-39CB-A232-A8095CA30E92]@0xffffff7f84fda000
com.apple.driver.AppleGraphicsDevicePolicy(3.7.7)[59E7CF6C-C2D1-3FFC-A122-DB048907FB67]@0xffffff7f86411000->0xffffff7f86417fff
dependency: com.apple.driver.AppleGraphicsControl(3.10.22)[61967104-88AF-3605-82F5-A480A2800A78]@0xffffff7f863ed000
dependency: com.apple.iokit.IOACPIFamily(1.4)[70E2B65E-A91A-3522-A1A0-79FD63EABB4C]@0xffffff7f84f41000
dependency: com.apple.iokit.IOPCIFamily(2.9)[52E715FC-521D-3869-B2EA-5228FA4BEA34]@0xffffff7f84724000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[82EAD591-67E3-39CB-A232-A8095CA30E92]@0xffffff7f84fda000
dependency: com.apple.AppleGraphicsDeviceControl(3.10.22)[44D7223C-9628-3FEA-A3B8-27DE9E1CE0C3]@0xffffff7f85fc3000