1. 03 Oct, 2018 1 commit
    • chunhui dai's avatar
      drm/mediatek: add refcount for DPI power on/off · 4e90a6eb
      chunhui dai authored
      After the kernel 4.4, the DRM disable flow was changed, if DPI was
      disableed before CRTC, it will cause warning message as following:
      
      ------------[ cut here ]------------
      WARNING: CPU: 0 PID: 1339 at ../../linux/linux-4.4.24-mtk/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x188/0x18c()
      vblank wait timed out on crtc 0
      Modules linked in: bridge mt8521p_ir_shim(O) i2c_eeprom(O) mtk_m4(O) fuse_ctrl(O) virtual_block(O) caamkeys(PO) chk(PO) amperctl(O) ledctl(O) apple_auth(PO) micctl(O) sensors(PO) lla(O) sdd(PO) ice40_fpga(O) psmon(O) event_queue(PO) utils(O) blackbox(O)
      CPU: 0 PID: 1339 Comm: kworker/0:1 Tainted: P        W  O    4.4.24 #1
      Hardware name: Mediatek Cortex-A7 (Device Tree)
      Workqueue: events drm_mode_rmfb_work_fn
      [<c001a710>] (unwind_backtrace) from [<c00151e4>] (show_stack+0x20/0x24)
      [<c00151e4>] (show_stack) from [<c027961c>] (dump_stack+0x98/0xac)
      [<c027961c>] (dump_stack) from [<c002ac54>] (warn_slowpath_common+0x94/0xc4)
      [<c002ac54>] (warn_slowpath_common) from [<c002acc4>] (warn_slowpath_fmt+0x40/0x48)
      [<c002acc4>] (warn_slowpath_fmt) from [<c03307ac>] (drm_wait_one_vblank+0x188/0x18c)
      [<c03307ac>] (drm_wait_one_vblank) from [<c03307d8>] (drm_crtc_wait_one_vblank+0x28/0x2c)
      [<c03307d8>] (drm_crtc_wait_one_vblank) from [<c034f48c>] (mtk_drm_crtc_disable+0x78/0x240)
      [<c034f48c>] (mtk_drm_crtc_disable) from [<c03240d4>] (drm_atomic_helper_commit_modeset_disables+0x128/0x3b8)
      [<c03240d4>] (drm_atomic_helper_commit_modeset_disables) from [<c0350a7c>] (mtk_atomic_complete+0x74/0xb4)
      [<c0350a7c>] (mtk_atomic_complete) from [<c0350b24>] (mtk_atomic_commit+0x68/0x98)
      [<c0350b24>] (mtk_atomic_commit) from [<c034ab48>] (drm_atomic_commit+0x54/0x74)
      [<c034ab48>] (drm_atomic_commit) from [<c0325c4c>] (drm_atomic_helper_set_config+0x7c/0xa0)
      [<c0325c4c>] (drm_atomic_helper_set_config) from [<c0338594>] (drm_mode_set_config_internal+0x68/0xe4)
      [<c0338594>] (drm_mode_set_config_internal) from [<c033967c>] (drm_framebuffer_remove+0xe4/0x120)
      [<c033967c>] (drm_framebuffer_remove) from [<c0339700>] (drm_mode_rmfb_work_fn+0x48/0x58)
      [<c0339700>] (drm_mode_rmfb_work_fn) from [<c0043a38>] (process_one_work+0x154/0x50c)
      [<c0043a38>] (process_one_work) from [<c0044074>] (worker_thread+0x284/0x568)
      [<c0044074>] (worker_thread) from [<c0049dc4>] (kthread+0xec/0x104)
      [<c0049dc4>] (kthread) from [<c0010678>] (ret_from_fork+0x14/0x3c)
      ---[ end trace 12ae5358e992abd5 ]---
      
      so, we add refcount for DPI power on/off to protect the flow.
      Signed-off-by: default avatarBibby Hsieh <bibby.hsieh@mediatek.com>
      Signed-off-by: default avatarchunhui dai <chunhui.dai@mediatek.com>
      Signed-off-by: default avatarCK Hu <ck.hu@mediatek.com>
      4e90a6eb
  2. 27 Sep, 2018 39 commits