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msm: camera: cdm: Add CDM hang detect and debug registers dump support

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Add support to dump the cdm core debug registers and CDM hang detect
support for better debugging purpose in case of cdm timeout at config
ife. Add a debugfs for CDM command buffer dump for cdm hang events.
Fix the possible NULL derefernce while dumping the cdm registers.
Turn on debugfs using following command in adb shell:
echo 1 >> /sys/kernel/debug/camera_isp_ctx/enable_cdm_cmd_buffer_dump.

CRs-Fixed: 2748715, 2782720, 2770565
Change-Id: Ibb9aa1d232d742ca1b6e64c16e9718bfc0bc8624
Signed-off-by: Jigar Agrawal <jigar@codeaurora.org>
This commit is contained in:
Jigar Agrawal
2020-09-01 18:12:19 -07:00
parent 6f7608c0a2
commit d74902f0cf
9 changed files with 142 additions and 85 deletions
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12
drivers/cam_isp/cam_isp_context.c
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@@ -5033,9 +5033,11 @@ static int __cam_isp_ctx_start_dev_in_ready(struct cam_context *ctx,
/* HW failure. user need to clean up the resource */
CAM_ERR(CAM_ISP, "Start HW failed");
ctx->state = CAM_CTX_READY;
trace_cam_context_state("ISP", ctx);
if (rc == -ETIMEDOUT)
if ((rc == -ETIMEDOUT) &&
(isp_ctx_debug.enable_cdm_cmd_buff_dump))
rc = cam_isp_ctx_dump_req(req_isp, 0, 0, NULL, false);
trace_cam_context_state("ISP", ctx);
list_del_init(&req->list);
list_add(&req->list, &ctx->pending_req_list);
goto end;
@@ -5628,7 +5630,7 @@ static int cam_isp_context_debug_register(void)
dbgfileptr = debugfs_create_dir("camera_isp_ctx", NULL);
if (!dbgfileptr) {
CAM_ERR(CAM_ICP,"DebugFS could not create directory!");
CAM_ERR(CAM_ISP, "DebugFS could not create directory!");
rc = -ENOENT;
goto end;
}
@@ -5637,9 +5639,11 @@ static int cam_isp_context_debug_register(void)
dbgfileptr = debugfs_create_u32("enable_state_monitor_dump", 0644,
isp_ctx_debug.dentry, &isp_ctx_debug.enable_state_monitor_dump);
dbgfileptr = debugfs_create_u8("enable_cdm_cmd_buffer_dump", 0644,
isp_ctx_debug.dentry, &isp_ctx_debug.enable_cdm_cmd_buff_dump);
if (IS_ERR(dbgfileptr)) {
if (PTR_ERR(dbgfileptr) == -ENODEV)
CAM_WARN(CAM_ICP, "DebugFS not enabled in kernel!");
CAM_WARN(CAM_ISP, "DebugFS not enabled in kernel!");
else
rc = PTR_ERR(dbgfileptr);
}