[PATCH v3 7/7] venus: Add a debugfs file for SSR trigger
From: Stanimir Varbanov <hidden>
Date: 2020-06-09 10:49:00
Also in:
linux-acpi, linux-arm-msm, linux-btrfs, linux-doc, linux-media, lkml
Subsystem:
arm/qualcomm mailing list, media input infrastructure (v4l/dvb), qualcomm venus video accelerator driver, the rest · Maintainers:
Mauro Carvalho Chehab, Vikash Garodia, Dikshita Agarwal, Linus Torvalds
The SSR (SubSystem Restart) is used to simulate an error on FW side of Venus. We support following type of triggers - fatal error, div by zero and watchdog IRQ. Signed-off-by: Stanimir Varbanov <redacted> --- drivers/media/platform/qcom/venus/dbgfs.c | 31 +++++++++++++++++++++++ 1 file changed, 31 insertions(+)
diff --git a/drivers/media/platform/qcom/venus/dbgfs.c b/drivers/media/platform/qcom/venus/dbgfs.c
index a2465fe8e20b..59d52e5af64a 100644
--- a/drivers/media/platform/qcom/venus/dbgfs.c
+++ b/drivers/media/platform/qcom/venus/dbgfs.c@@ -9,6 +9,35 @@ extern int venus_fw_debug; +static int trigger_ssr_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static ssize_t trigger_ssr_write(struct file *filp, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct venus_core *core = filp->private_data; + u32 ssr_type; + int ret; + + ret = kstrtou32_from_user(buf, count, 4, &ssr_type); + if (ret) + return ret; + + ret = hfi_core_trigger_ssr(core, ssr_type); + if (ret < 0) + return ret; + + return count; +} + +static const struct file_operations ssr_fops = { + .open = trigger_ssr_open, + .write = trigger_ssr_write, +}; + int venus_dbgfs_init(struct venus_core *core) { core->root = debugfs_create_dir("venus", NULL);
@@ -17,6 +46,8 @@ int venus_dbgfs_init(struct venus_core *core) debugfs_create_x32("fw_level", 0644, core->root, &venus_fw_debug); + debugfs_create_file("trigger_ssr", 0200, core->root, core, &ssr_fops); + return 0; }
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2.17.1