Other Parts Discussed in Thread: OMAP3530
I have a problem with the DSS when being disabled. I'm running the2.6.22 kernel with on a custom OMAP3530 board.
I am running a video capture through gstreamer and using a tee to displaying a live preview of the video to the LCD screen. When the DSS is disabled (via fb_timeout) I get a kernel panic (below). I've narrowed down the cause to when the DSS is being stopped by commenting the particular portion in the driver.
I get the following error from the kernel at the moment when the DSS is being disabled. The result is the video cannot be recovered and the system need to be reset.
[ 175.429687] Unhandled fault: external abort on non-linefetch (0x1808) at 0xd805041c
[ 175.429687] Internal error: : 1808 [#1]
[ 175.429687] Modules linked in: lpm_omap3530 dsplinkk cmemk
[ 175.429687] CPU: 0 Not tainted (2.6.22.18-omap3 #5)
[ 175.429687] PC is at omap2_disp_unregister_isr+0x84/0xd8
[ 175.429687] LR is at 0xc042b898
[ 175.429687] pc : [<c007cc04>] lr : [<c042b898>] psr: 60000093
[ 175.429687] sp : ca893dd4 ip : 00004000 fp : ca893de4
[ 175.429687] r10: ca893e38 r9 : 40045613 r8 : 00000000
[ 175.429687] r7 : ca893e38 r6 : cb5c2400 r5 : c06d6800 r4 : c01e652c
[ 175.429687] r3 : d8050000 r2 : 00000000 r1 : 20000013 r0 : 00000000
[ 175.429687] Flags: nZCv IRQs off FIQs on Mode SVC_32 Segment user
[ 175.429687] Control: 00c5387f Table: 8bb28018 DAC: 00000015
[ 175.429687] Process axondvr (pid: 521, stack limit = 0xca8922d8)
[ 175.429687] Stack: (0xca893dd4 to 0xca894000)
[ 175.429687] 3dc0: cd735080 ca893e24 ca893de8
[ 175.429687] 3de0: c01e79ec c007cb8c c00888b8 c0087ff4 cd735080 202618fc 00000001 00000000
[ 175.429687] 3e00: 00000000 cb5c2400 41cdfa54 00000000 40045613 ca893e38 ca893ee4 ca893e28
[ 175.429687] 3e20: c01d3090 c01e6a3c 00000001 cdad46e8 00000001 00000000 00000002 c00d8b14
[ 175.429687] 3e40: ca893f20 0000007c cda9d5a0 cc7df780 00000000 00000000 c0580b60 ca893e90
[ 175.429687] 3e60: cda9d5a0 ca893f70 0000007b 001c4180 ca892000 00000000 ca893f44 ca893e88
[ 175.429687] 3e80: c00c4cb4 c00caf90 00000000 00000000 ca893f0c ca893ea0 00000000 00000001
[ 175.429687] 3ea0: ffffffff cda9d5a0 00000000 00000000 00000000 00000000 c06f7040 40045613
[ 175.429687] 3ec0: 41cdfa54 0000000f c06d6800 cb5c2400 41cdfa54 cdad46e8 ca893f3c ca893ee8
[ 175.429687] 3ee0: c01e82b8 c01d2ee4 c01e6a30 cbb2f180 00000000 40045613 cbb2f18c 0000007b
[ 175.429687] 3f00: ca893f44 ca893f10 c00b87ac 00000000 00000000 40045613 41cdfa54 0000000f
[ 175.429687] 3f20: cb5c2400 c004c028 ca892000 00000000 ca893f54 ca893f40 c00d0b10 c01e81e8
[ 175.429687] 3f40: cb5c2400 41cdfa54 ca893f7c ca893f58 c00d0d80 c00d0ab4 cda9d5a0 0000007b
[ 175.429687] 3f60: 0000000f 41cdfa54 40045613 cb5c2400 ca893fa4 ca893f80 c00d0dd8 c00d0b2c
[ 175.429687] 3f80: 00000000 00000001 00000001 000397b8 0012b000 00000036 00000000 ca893fa8
[ 175.429687] 3fa0: c004be80 c00d0da4 00000001 000397b8 0000000f 40045613 41cdfa54 00000001
[ 175.429687] 3fc0: 00000001 000397b8 0012b000 00000036 409ec800 0000001b 0000000f 0000001b
[ 175.429687] 3fe0: 00000002 41cdfa00 4096df40 4076201c 60000010 0000000f 00000000 00000000
[ 175.429687] Backtrace:
[ 175.429687] [<c007cb80>] (omap2_disp_unregister_isr+0x0/0xd8) from [<c01e79ec>] (omap24xxvout_do_ioctl+0xfbc/0x158c)
[ 175.429687] r4:cd735080
[ 175.429687] [<c01e6a30>] (omap24xxvout_do_ioctl+0x0/0x158c) from [<c01d3090>] (video_usercopy+0x1b8/0x2b8)
[ 175.429687] [<c01d2ed8>] (video_usercopy+0x0/0x2b8) from [<c01e82b8>] (omap24xxvout_ioctl+0xdc/0xec)
[ 175.429687] [<c01e81dc>] (omap24xxvout_ioctl+0x0/0xec) from [<c00d0b10>] (do_ioctl+0x68/0x78)
[ 175.429687] [<c00d0aa8>] (do_ioctl+0x0/0x78) from [<c00d0d80>] (vfs_ioctl+0x260/0x278)
[ 175.429687] r5:41cdfa54 r4:cb5c2400
[ 175.429687] [<c00d0b20>] (vfs_ioctl+0x0/0x278) from [<c00d0dd8>] (sys_ioctl+0x40/0x64)
[ 175.429687] r7:cb5c2400 r6:40045613 r5:41cdfa54 r4:0000000f
[ 175.429687] [<c00d0d98>] (sys_ioctl+0x0/0x64) from [<c004be80>] (ret_fast_syscall+0x0/0x2c)
[ 175.429687] r7:00000036 r6:0012b000 r5:000397b8 r4:00000001
[ 175.429687] Code: e18cc002 1afffff9 e59f3050 e2110080 (e583c41c)
Thanks
Davy