msm kitkat kernel crash on Nexus 5

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Anup Warnulkar

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Feb 26, 2014, 7:01:17 AM2/26/14

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I downloaded latest android msm kernel kitkat-mr1 release.

After building the kernel and flashing the android build image on Nexus 5, the screen sometimes freezes and the phone reboots.
Below is the output of last_kmsg after this crash happened.

4784 [ 120.535898] ------------[ cut here ]------------
4785 [ 120.536018] WARNING: at drivers/video/msm/mdss/mdss_mdp_intf_cmd.c:440 mdss_mdp_cmd_wait4pingpong+0xc4/0x120()
4786 [ 120.536059] cmd kickoff timed out (0) ctl=0
4787 [ 120.536126] Modules linked in: brcm_bt_drv fm_drv brcm_hci_ldisc
4788 [ 120.536321] [<c010e59c>] (unwind_backtrace+0x0/0x144) from [<c0a01bec>] (dump_stack+0x20/0x24)
4789 [ 120.536401] [<c0a01bec>] (dump_stack+0x20/0x24) from [<c0192e10>] (warn_slowpath_common+0x5c/0x74)
4790 [ 120.536477] [<c0192e10>] (warn_slowpath_common+0x5c/0x74) from [<c0192ee4>] (warn_slowpath_fmt+0x40/0x48)
4791 [ 120.536553] [<c0192ee4>] (warn_slowpath_fmt+0x40/0x48) from [<c04378d0>] (mdss_mdp_cmd_wait4pingpong+0xc4/0x120)
4792 [ 120.536628] [<c04378d0>] (mdss_mdp_cmd_wait4pingpong+0xc4/0x120) from [<c042cb10>] (mdss_mdp_display_commit+0x1a4/0x30c)
4793 [ 120.536704] [<c042cb10>] (mdss_mdp_display_commit+0x1a4/0x30c) from [<c043c370>] (mdss_mdp_overlay_kickoff+0x1cc/0x374)
4794 [ 120.536780] [<c043c370>] (mdss_mdp_overlay_kickoff+0x1cc/0x374) from [<c045dfc8>] (__mdss_fb_display_thread+0x134/0x324)
4795 [ 120.536857] [<c045dfc8>] (__mdss_fb_display_thread+0x134/0x324) from [<c01b4354>] (kthread+0x98/0xa4)
4796 [ 120.536904] [<c01b4354>] (kthread+0x98/0xa4) from [<c0108120>] (kernel_thread_exit+0x0/0x8)
4797 [ 120.536975] ---[ end trace 0e3fd3abe229757e ]---
4798 [ 120.537046] __mdss_fb_sync_buf_done_callback: mdp-fence: frame timeout
4799 [ 122.535914] mdss_dsi_cmd_mdp_busy: timedout
4800 [ 122.535994] mdss_mdp_irq_enable: MDSS MDP IRQ-0x100 is already set, mask=1100
4801
4802 No errors detected
4803 Boot info:
4804 Last boot reason: wdog_bite

This seems to some problem in video drivers. But i have not modified anything in video drivers nor the module i am inserting into the kernel depends on video drivers.
Also the phone sometimes randomly reboots and last_kmsg does not show any crash logs.

I am unable to figure out any fix.

Thanks,
Anup

JF Dionne

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Feb 28, 2014, 1:57:06 PM2/28/14

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Have you copied all the right proprietary binaries for Nexus 5 for the right android version you are trying to run ?