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Date:   Sun, 14 Jun 2020 08:35:11 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4 1/3] venus: Add debugfs interface to set firmware log
 level

On Sun, Jun 14, 2020 at 01:39:17AM +0300, Stanimir Varbanov wrote:
> This will be useful when debugging specific issues related to
> firmware HFI interface.
> 
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>

You didn't cc: any of us on the patchs, like you did on 0/3 :(


> ---
>  drivers/media/platform/qcom/venus/Makefile    |  2 +-
>  drivers/media/platform/qcom/venus/core.c      |  3 +++
>  drivers/media/platform/qcom/venus/core.h      |  3 +++
>  drivers/media/platform/qcom/venus/dbgfs.c     | 21 +++++++++++++++++++
>  drivers/media/platform/qcom/venus/dbgfs.h     | 12 +++++++++++
>  drivers/media/platform/qcom/venus/hfi_venus.c |  7 ++++++-
>  6 files changed, 46 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..249141e27fea 100644
> --- a/drivers/media/platform/qcom/venus/core.c
> +++ b/drivers/media/platform/qcom/venus/core.c
> @@ -290,6 +290,8 @@ static int venus_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_dev_unregister;
>  
> +	venus_dbgfs_init(core);
> +
>  	return 0;
>  
>  err_dev_unregister:
> @@ -337,6 +339,7 @@ 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..782d54ac1b8f
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/dbgfs.c
> @@ -0,0 +1,21 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2020 Linaro Ltd.
> + */
> +
> +#include <linux/debugfs.h>
> +
> +#include "core.h"
> +
> +extern int venus_fw_debug;
> +
> +void venus_dbgfs_init(struct venus_core *core)
> +{
> +	core->root = debugfs_create_dir("venus", NULL);
> +	debugfs_create_x32("fw_level", 0644, core->root, &venus_fw_debug);
> +}
> +
> +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..b7b621a8472f
> --- /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;
> +
> +void 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);

Why do you care about this to tell the user about it?

thanks,

greg k-h

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