[PATCH v3 5/7] venus: Add debugfs interface to set firmware log level

Stanimir Varbanov
2020-06-09T10:48:21Z

This will be useful when debugging specific issues related to
firmware HFI interface.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
drivers/media/platform/qcom/venus/Makefile | 2 +-
drivers/media/platform/qcom/venus/core.c | 5 ++++
drivers/media/platform/qcom/venus/core.h | 3 +++
drivers/media/platform/qcom/venus/dbgfs.c | 26 +++++++++++++++++++
drivers/media/platform/qcom/venus/dbgfs.h | 12 +++++++++
drivers/media/platform/qcom/venus/hfi_venus.c | 7 ++++-
6 files changed, 53 insertions(+), 2 deletions(-)
create mode 100644 drivers/media/platform/qcom/venus/dbgfs.c
create mode 100644 drivers/media/platform/qcom/venus/dbgfs.h

diff --git a/drivers/media/platform/qcom/venus/Makefile b/drivers/media/platform/qcom/venus/Makefile
index 64af0bc1edae..dfc636865709 100644
--- a/drivers/media/platform/qcom/venus/Makefile
+++ b/drivers/media/platform/qcom/venus/Makefile
@@ -3,7 +3,7 @@

venus-core-objs += core.o helpers.o firmware.o \
hfi_venus.o hfi_msgs.o hfi_cmds.o hfi.o \
- hfi_parser.o pm_helpers.o
+ hfi_parser.o pm_helpers.o dbgfs.o

venus-dec-objs += vdec.o vdec_ctrls.o
venus-enc-objs += venc.o venc_ctrls.o
diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 203c6538044f..bbb394ca4175 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -290,6 +290,10 @@ static int venus_probe(struct platform_device *pdev)
if (ret)
goto err_dev_unregister;

+ ret = venus_dbgfs_init(core);
+ if (ret)
+ goto err_dev_unregister;
+
return 0;

err_dev_unregister:
@@ -337,6 +341,7 @@ static int venus_remove(struct platform_device *pdev)
v4l2_device_unregister(&core->v4l2_dev);
mutex_destroy(&core->pm_lock);
mutex_destroy(&core->lock);
+ venus_dbgfs_deinit(core);

return ret;
}
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 7118612673c9..b48782f9aa95 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -12,6 +12,7 @@
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>

+#include "dbgfs.h"
#include "hfi.h"

#define VIDC_CLKS_NUM_MAX 4
@@ -136,6 +137,7 @@ struct venus_caps {
* @priv: a private filed for HFI operations
* @ops: the core HFI operations
* @work: a delayed work for handling system fatal error
+ * @root: debugfs root directory
*/
struct venus_core {
void __iomem *base;
@@ -185,6 +187,7 @@ struct venus_core {
unsigned int codecs_count;
unsigned int core0_usage_count;
unsigned int core1_usage_count;
+ struct dentry *root;
};

struct vdec_controls {
diff --git a/drivers/media/platform/qcom/venus/dbgfs.c b/drivers/media/platform/qcom/venus/dbgfs.c
new file mode 100644
index 000000000000..a2465fe8e20b
--- /dev/null
+++ b/drivers/media/platform/qcom/venus/dbgfs.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Linaro Ltd.
+ */
+
+#include <linux/debugfs.h>
+
+#include "core.h"
+
+extern int venus_fw_debug;
+
+int venus_dbgfs_init(struct venus_core *core)
+{
+ core->root = debugfs_create_dir("venus", NULL);
+ if (IS_ERR(core->root))
+ return IS_ERR(core->root);
+
+ debugfs_create_x32("fw_level", 0644, core->root, &venus_fw_debug);
+
+ return 0;
+}
+
+void venus_dbgfs_deinit(struct venus_core *core)
+{
+ debugfs_remove_recursive(core->root);
+}
diff --git a/drivers/media/platform/qcom/venus/dbgfs.h b/drivers/media/platform/qcom/venus/dbgfs.h
new file mode 100644
index 000000000000..4e35bd7db15f
--- /dev/null
+++ b/drivers/media/platform/qcom/venus/dbgfs.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2020 Linaro Ltd. */
+
+#ifndef __VENUS_DBGFS_H__
+#define __VENUS_DBGFS_H__
+
+struct venus_core;
+
+int venus_dbgfs_init(struct venus_core *core);
+void venus_dbgfs_deinit(struct venus_core *core);
+
+#endif
diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c
index 0d8855014ab3..3a04b08ab85a 100644
--- a/drivers/media/platform/qcom/venus/hfi_venus.c
+++ b/drivers/media/platform/qcom/venus/hfi_venus.c
@@ -130,7 +130,7 @@ struct venus_hfi_device {
};

static bool venus_pkt_debug;
-static int venus_fw_debug = HFI_DEBUG_MSG_ERROR | HFI_DEBUG_MSG_FATAL;
+int venus_fw_debug = HFI_DEBUG_MSG_ERROR | HFI_DEBUG_MSG_FATAL;
static bool venus_sys_idle_indicator;
static bool venus_fw_low_power_mode = true;
static int venus_hw_rsp_timeout = 1000;
@@ -1130,9 +1130,14 @@ static int venus_session_init(struct venus_inst *inst, u32 session_type,
u32 codec)
{
struct venus_hfi_device *hdev = to_hfi_priv(inst->core);
+ struct device *dev = hdev->core->dev;
struct hfi_session_init_pkt pkt;
int ret;

+ ret = venus_sys_set_debug(hdev, venus_fw_debug);
+ if (ret)
+ dev_warn(dev, "setting fw debug msg ON failed (%d)\n", ret);
+
ret = pkt_session_init(&pkt, inst, session_type, codec);
if (ret)
goto err;
--
2.17.1