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部件号：DM3730工具/软件：
平台： DM3730
内核版本： 6.1.119
子系统： OMAP DRM/显示
我在 DM3730 上的暂停/恢复周期中遇到可重现的内核错误警告。 出现问题 从第二个暂停/恢复循环开始 并且在每个后续周期中始终发生。
root@dev:~# echo mem > /sys/power/state [ 230.821838] PM: suspend entry (deep) [ 230.864044] Filesystems sync: 0.042 seconds [ 230.864776] Freezing user space processes [ 230.866363] Freezing user space processes completed (elapsed 0.001 seconds) [ 230.866394] OOM killer disabled. [ 230.866424] Freezing remaining freezable tasks [ 230.868011] Freezing remaining freezable tasks completed (elapsed 0.001 seconds) [ 230.868041] printk: Suspending console(s) (use no_console_suspend to debug) [ 230.985168] plane-0: visible 1 -> 0 [ 230.985198] in gfx new_plane_state->visible [ 230.985198] gfx: release from plane plane-0 [ 230.998138] gfx: disabled [ 231.118713] Disabling non-boot CPUs ... [ 231.118743] Successfully put all powerdomains to target state [ 231.162597] plane-0: visible 0 -> 1 [ 231.162628] plane: plane-0 overlay_id: 0 [ 231.162780] plane-0, crtc=b5ec2eb2 fb=e11e1f30 [ 231.162811] gfx: 800x480 -> 800x480 (800) root@dev:~# [ 231.162811] 0,0 0x9e900000 0x00000000 [ 231.510681] OOM killer enabled. [ 231.510681] Restarting tasks ... done. [ 231.528442] random: crng reseeded on system resumption [ 231.530090] PM: suspend exit root@dev:~# root@dev:~# root@dev:~# echo mem > /sys/power/state [ 259.101531] PM: suspend entry (deep) [ 259.200714] Filesystems sync: 0.099 seconds [ 259.201416] Freezing user space processes [ 259.203002] Freezing user space processes completed (elapsed 0.001 seconds) [ 259.203033] OOM killer disabled. [ 259.203033] Freezing remaining freezable tasks [ 259.204650] Freezing remaining freezable tasks completed (elapsed 0.001 seconds) [ 259.204681] printk: Suspending console(s) (use no_console_suspend to debug) [ 259.324981] plane-0: visible 1 -> 0 [ 259.325012] in gfx new_plane_state->visible [ 259.325012] ------------[ cut here ]------------ [ 259.325012] WARNING: CPU: 0 PID: 585 at drivers/gpu/drm/omapdrm/omap_overlay.c:131 omap_plane_atomic_check+0x144/0x4f8 [ 259.325073] Modules linked in: [ 259.325103] CPU: 0 PID: 585 Comm: sh Not tainted 6.1.119-rt45-baxter-dm3730-dirty #21 [ 259.325134] Hardware name: Generic OMAP36xx (Flattened Device Tree) [ 259.325164] unwind_backtrace from show_stack+0x10/0x14 [ 259.325195] show_stack from dump_stack_lvl+0x40/0x4c [ 259.325225] dump_stack_lvl from __warn+0x74/0x12c [ 259.325256] __warn from warn_slowpath_fmt+0x118/0x220 [ 259.325286] warn_slowpath_fmt from omap_plane_atomic_check+0x144/0x4f8 [ 259.325347] omap_plane_atomic_check from drm_atomic_helper_check_planes+0xe4/0x228 [ 259.325378] drm_atomic_helper_check_planes from drm_atomic_helper_check+0x44/0x90 [ 259.325408] drm_atomic_helper_check from omap_atomic_check+0x18/0x22c [ 259.325439] omap_atomic_check from drm_atomic_check_only+0x6a0/0xa88 [ 259.325469] drm_atomic_check_only from drm_atomic_commit+0x64/0xe8 [ 259.325500] drm_atomic_commit from drm_atomic_helper_disable_all+0x1bc/0x1cc [ 259.325531] drm_atomic_helper_disable_all from drm_atomic_helper_suspend+0x98/0x1fc [ 259.325561] drm_atomic_helper_suspend from drm_mode_config_helper_suspend+0x2c/0x80 [ 259.325622] drm_mode_config_helper_suspend from dpm_run_callback+0x4c/0x164 [ 259.325653] dpm_run_callback from __device_suspend+0x114/0x510 [ 259.325683] __device_suspend from dpm_suspend+0xf8/0x26c [ 259.325714] dpm_suspend from dpm_suspend_start+0x88/0x98 [ 259.325744] dpm_suspend_start from suspend_devices_and_enter+0x13c/0x838 [ 259.325805] suspend_devices_and_enter from pm_suspend+0x2c8/0x398 [ 259.325805] pm_suspend from state_store+0x68/0xc8 [ 259.325836] state_store from kernfs_fop_write_iter+0x10c/0x1cc [ 259.325866] kernfs_fop_write_iter from vfs_write+0x240/0x348 [ 259.325897] vfs_write from ksys_write+0x60/0xec [ 259.325927] ksys_write from __sys_trace_return+0x0/0x10 [ 259.325958] Exception stack(0xe0909fa8 to 0xe0909ff0) [ 259.325988] 9fa0: 00000004 0013c950 00000001 0013c950 00000004 00000000 [ 259.325988] 9fc0: 00000004 0013c950 b6f0bba0 00000004 b6f87080 b6f0c15c 00000000 00000000 [ 259.326019] 9fe0: 001042f4 bef3f940 b6e0ffdc b6e7c768 [ 259.326019] ---[ end trace 0000000000000000 ]--- [ 259.330078] gfx: disabled [ 259.458618] Disabling non-boot CPUs ... [ 259.458648] Successfully put all powerdomains to target state [ 259.502410] plane-0: visible 0 -> 1 [ 259.502471] plane: plane-0 overlay_id: 0 [ 259.502624] plane-0, crtc=b5ec2eb2 fb=e11e1f30 [ 259.502655] gfx: 800x480 -> 800x480 (800) root@dev:~# [ 259.502655] 0,0 0x9e900000 0x00000000 [ 259.989013] OOM killer enabled. [ 259.989044] Restarting tasks ... done. [ 260.006652] random: crng reseeded on system resumption [ 260.008331] PM: suspend exit
文件： drivers/gpu/drm/omapdrm/omap_overlay.c
功能： omap_overlay_release()
void omap_overlay_release(struct drm_atomic_state *s, struct omap_hw_overlay *overlay)
{
/* Get the global state of the current atomic transaction */
struct omap_global_state *state = omap_get_global_state(s);
struct drm_plane **overlay_map = state->hwoverlay_to_plane;
if (!overlay)
return;
if (WARN_ON(!overlay_map[overlay->idx]))
return;
DBG("%s: release from plane %s", overlay->name, overlay_map[overlay->idx]->name);
overlay_map[overlay->idx] = NULL; // ← This line triggers the crash on second suspend/resume
}问题似乎与有关 原子状态管理 在重叠清理过程中。 该 omap_overlay_release() 函数在该 atomic_check 阶段被调用、并且覆盖映射 被设置为 NULLoverlay_map[overlay->idx] = NULL ()。
The problem occurs when suspend /resume is invoked for the second time, since this time overlay mapping is already set to NULL and it was not reassigned back during the previous resume operation, hence the line " if (WARN_ON(!overlay_map[overlay->idx]))" return true.
作为临时补丁,我发现注释“overlay_map[overlay->idx]= NULL“解决了这个问题。 但这对我来说似乎不对。
下面是我的问题、
是否有其他人遇到此问题 在 OMAP3/DM3730 平台上？- 这是一种已知的回归 OMAP DRM 原子框架实现中？
- 正确方法是什么 原子模型中的重叠清理？ 这是否应该在流水线中的其他位置发生？
-
是否有任何现有补丁程序 解决这个特定问题的方法是什么？
