V4L2 capture using saLoopBackFbdev

Other Parts Discussed in Thread: TVP7002

I'm using ezsdk v.5.05.02.00 on the 816x EVM. I am trying to caputre component video using saLoopBackFbdev demo accoring to the explanation in the following document:

http://processors.wiki.ti.com/index.php/TI81XX_PSP_VIDEO_CAPTURE_Driver_User_Guide

To this end, I replaced the original load-hd-firmware.sh script with load-hd-v4l2-firmware.sh which inserts vpss and ti81xxfb modules in the following way:

modprobe vpss sbufaddr=0xBFB00000 mode=hdmi:1080p-60,dvo2:1080p-60,hdcomp:1080p-60 i2c_mode=0
modprobe ti81xxfb vram=0:40M,1:1M,2:1M

I have set bootargs in my boot script as follows:

setenv bootargs 'console=ttyO2,115200n8 rootwait rw mem=256M earlyprintk notifyk.vpssm3_sva=0xBF900000 vram=50M ti816xfb.vram=0:40M,1:1M,2:1M root=/dev/nfs nfsroot=10.0.24.196:/root/targetfs ip=dhcp'

The saLoopBack demo runs fine, showing the captured video on HDMI out. But, saLoopBackFbdev captured frame (saved into file captdump.yuv) is cropped and scrambled. The output log of saLoopBackFbdev follows:

Driver Name: ti81xxvin
Driver bus info: TI81xx Platform
Driver is capable of doing capture
saLoopBackFbdev:
 Mode set is 1080P60
=============================================================
Capture Format:
=============================================================
fmt.type                 = 1
fmt.width                = 1920
fmt.height               = 1080
fmt.pixelformat  = 859981650
fmt.bytesperline         = 5760
fmt.sizeimage    = 6220800
=============================================================

Fix Screen Info:
----------------
Line Length - 7680
Physical Address = 8ce00000
Buffer Length = ------------[ cut here ]------------
WARNING: at kernel/softirq.c:159 local_bh_enable+0x54/0xc4()
Modules linked in: ti81xxhdmi ti81xxvin tvp7002 ti81xxvo ti81xxfb vpss syslink ipv6 [last unloaded: pvrsrvkm]
Backtrace:
[<c004abb8>] (dump_backtrace+0x0/0x110) from [<c039d8f4>] (dump_stack+0x18/0x1c)
 r7:00000000 r6:c0075178 r5:c0467f7a r4:0000009f
[<c039d8dc>] (dump_stack+0x0/0x1c) from [<c006fbfc>] (warn_slowpath_common+0x54/0x6c)
[<c006fba8>] (warn_slowpath_common+0x0/0x6c) from [<c006fc38>] (warn_slowpath_null+0x24/0x2c)
 r9:c0518d1c r8:d088c780 r7:0000000d r6:cca89b00 r5:c04f25a8
r4:c0544080
[<c006fc14>] (warn_slowpath_null+0x0/0x2c) from [<c0075178>] (local_bh_enable+0x54/0xc4)
[<c0075124>] (local_bh_enable+0x0/0xc4) from [<c0069af4>] (omap_mbox_msg_send+0xcc/0xdc)
 r5:c04f25a8 r4:00000000
[<c0069a28>] (omap_mbox_msg_send+0x0/0xdc) from [<c02de844>] (notify_shm_drv_send_event+0x1c8/0x208)
 r5:00000001 r4:00000000
[<c02de67c>] (notify_shm_drv_send_event+0x0/0x208) from [<c02dbfd4>] (notify_send_event+0x114/0x26c)
[<c02dbec0>] (notify_send_event+0x0/0x26c) from [<bf192a08>] (vps_fvid2_queue+0xe4/0x21c [vpss])
[<bf192924>] (vps_fvid2_queue+0x0/0x21c [vpss]) from [<bf19bcfc>] (capture_queue+0x50/0x64 [vpss])
 r8:bf1d4414 r7:60000013 r6:c7926280 r5:00000000 r4:ccb5a400
[<bf19bcac>] (capture_queue+0x0/0x64 [vpss]) from [<bf1d31d4>] (ti81xxvin_buffer_queue+0x9c/0xe8 [ti81xxvin])
 r5:cb7b2800 r4:ccb5a400
[<bf1d3138>] (ti81xxvin_buffer_queue+0x0/0xe8 [ti81xxvin]) from [<c02b57d4>] (videobuf_streamon+0x80/0xd0)
 r7:60000013 r6:cb7b29c4 r5:cb7b2904 r4:c7926280
[<c02b5754>] (videobuf_streamon+0x0/0xd0) from [<bf1d2c4c>] (vidioc_streamon+0x244/0x400 [ti81xxvin])
 r7:cb7aa400 r6:00000001 r5:cb7b2800 r4:cb7b2904
[<bf1d2a08>] (vidioc_streamon+0x0/0x400 [ti81xxvin]) from [<c02ab0dc>] (__video_do_ioctl+0x1618/0x3f34)
 r6:40045612 r5:00000000 r4:00000001
[<c02a9ac4>] (__video_do_ioctl+0x0/0x3f34) from [<c02a98b4>] (__video_usercopy+0x2e4/0x428)
[<c02a95d0>] (__video_usercopy+0x0/0x428) from [<c02a9a28>] (video_ioctl2+0x30/0x38)
[<c02a99f8>] (video_ioctl2+0x0/0x38) from [<c02a8a68>] (v4l2_ioctl+0xe8/0x11c)
 r5:cb7aa400 r4:c7926c80
[<c02a8980>] (v4l2_ioctl+0x0/0x11c) from [<c00d521c>] (vfs_ioctl+0x28/0x44)
 r9:c79c2000 r8:bebc5ca4 r7:00000004 r6:00000004 r5:c7926c80
r4:00000000
[<c00d51f4>] (vfs_ioctl+0x0/0x44) from [<c00d592c>] (do_vfs_ioctl+0x500/0x540)
[<c00d542c>] (do_vfs_ioctl+0x0/0x540) from [<c00d59c4>] (sys_ioctl+0x58/0x7c)
[<c00d596c>] (sys_ioctl+0x0/0x7c) from [<c0046e00>] (ret_fast_syscall+0x0/0x30)
 r8:c0046fa8 r7:00000036 r6:00000001 r5:00000004 r4:00012168
---[ end trace f46703be81464c42 ]---
41943040

Var Screen Info:
----------------
Xres - 1920
Yres - 1080
Xres Virtual - 1920
Yres Virtual - 3240
nonstd       - 0
Bits Per Pixel - 32
blue lenth 8 msb 0 offset 0
red lenth 8 msb 0 offset 16
green lenth 8 msb 0 offset 8
trans lenth 8 msb 0 offset 24

Var Screen Info:
----------------
Xres - 1920
Yres - 1080
Xres Virtual - 1920
Yres Virtual - 4320
nonstd       - 0
Bits Per Pixel - 24
blue lenth 8 msb 0 offset 0
red lenth 8 msb 0 offset 16
green lenth 8 msb 0 offset 8
trans lenth 0 msb 0 offset 0

Fix Screen Info:
----------------
Line Length - 5760
Physical Address = 8ce00000
Buffer Length = 41943040
C: 0
 TS: 51265 index 0
Result Time:    9 77297
Calculated Frame Rate:  55 Fps

I also tried to use sbufaddr=0xA0200000 and notifyk.vpssm3_sva=0xA0000000 as given in the following document:

http://processors.wiki.ti.com/index.php/DM816X_AM389X_VPSS_Video_Driver_User_Guide_PSP_04.00.01.14

But the VPSS module cannot be loaded using these paramters when runnign load-hd-v4l2-firmware.sh script. Plese let me know if I need to make any other changes to allow saLoopBack demo to capture the frame in correct format.

Thanks,
Mohammad