From: Stanimir Varbanov <stanimir.varbanov@linaro.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-btrfs@vger.kernel.org, linux-acpi@vger.kernel.org,
netdev@vger.kernel.org, Joe Perches <joe@perches.com>,
Jason Baron <jbaron@akamai.com>
Subject: Re: [PATCH v3 6/7] venus: Make debug infrastructure more flexible
Date: Wed, 10 Jun 2020 16:29:27 +0300 [thread overview]
Message-ID: <dc85bf9e-e3a6-15a1-afaa-0add3e878573@linaro.org> (raw)
In-Reply-To: <20200609111414.GC780233@kroah.com>
On 6/9/20 2:14 PM, Greg Kroah-Hartman wrote:
> On Tue, Jun 09, 2020 at 01:46:03PM +0300, Stanimir Varbanov wrote:
>> Here we introduce few debug macros with levels (low, medium and
>> high) and debug macro for firmware. Enabling the particular level
>> will be done by dynamic debug with levels.
>>
>> For example to enable debug messages with low level:
>> echo 'module venus_dec level 0x01 +p' > debugfs/dynamic_debug/control
>>
>> If you want to enable all levels:
>> echo 'module venus_dec level 0x07 +p' > debugfs/dynamic_debug/control
>>
>> All the features which dynamic debugging provide are preserved.
>>
>> And finaly all dev_dbg are translated to VDBGX with appropriate
>> debug levels.
>>
>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
>> ---
>> drivers/media/platform/qcom/venus/core.h | 5 ++
>> drivers/media/platform/qcom/venus/helpers.c | 2 +-
>> drivers/media/platform/qcom/venus/hfi_msgs.c | 30 ++++-----
>> drivers/media/platform/qcom/venus/hfi_venus.c | 20 ++++--
>> .../media/platform/qcom/venus/pm_helpers.c | 3 +-
>> drivers/media/platform/qcom/venus/vdec.c | 63 +++++++++++++++++--
>> drivers/media/platform/qcom/venus/venc.c | 4 ++
>> 7 files changed, 96 insertions(+), 31 deletions(-)
>>
>> diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
>> index b48782f9aa95..63eabf5ff96d 100644
>> --- a/drivers/media/platform/qcom/venus/core.h
>> +++ b/drivers/media/platform/qcom/venus/core.h
>> @@ -15,6 +15,11 @@
>> #include "dbgfs.h"
>> #include "hfi.h"
>>
>> +#define VDBGL(fmt, args...) pr_debug_level(0x01, fmt, ##args)
>> +#define VDBGM(fmt, args...) pr_debug_level(0x02, fmt, ##args)
>> +#define VDBGH(fmt, args...) pr_debug_level(0x04, fmt, ##args)
>> +#define VDBGFW(fmt, args...) pr_debug_level(0x08, fmt, ##args)
>> +
>> #define VIDC_CLKS_NUM_MAX 4
>> #define VIDC_VCODEC_CLKS_NUM_MAX 2
>> #define VIDC_PMDOMAINS_NUM_MAX 3
>> diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
>> index 0143af7822b2..115a9a2af1d6 100644
>> --- a/drivers/media/platform/qcom/venus/helpers.c
>> +++ b/drivers/media/platform/qcom/venus/helpers.c
>> @@ -396,7 +396,7 @@ put_ts_metadata(struct venus_inst *inst, struct vb2_v4l2_buffer *vbuf)
>> }
>>
>> if (slot == -1) {
>> - dev_dbg(inst->core->dev, "%s: no free slot\n", __func__);
>> + VDBGH("no free slot for timestamp\n");
>
> So you just lost the information that dev_dbg() gave you with regards to
> the device/driver/instance creating that message?
No, I don't lose anything. When I do debug I know that all debug
messages comes from my driver. dev_dbg will give me few device
identifiers which I don't care so much. IMO, the device information
makes more sense to dev_err/warn/err variants. On the other side we
will have dev_dbg_level(group) if still someone needs the device
information.
>
> Ick, no, don't do that.
>
> And why is this driver somehow "special" compared to all the rest of
Of course it is special ... to me ;-)
> the kernel? Why is the current dev_dbg() control not sufficient that
> you need to change the core for just this tiny thing?
>
> thanks,
>
> greg k-h
>
--
regards,
Stan
next prev parent reply other threads:[~2020-06-10 13:29 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 10:45 [PATCH v3 0/7] Venus dynamic debug Stanimir Varbanov
2020-06-09 10:45 ` [PATCH v3 1/7] Documentation: dynamic-debug: Add description of level bitmask Stanimir Varbanov
2020-06-09 11:09 ` Matthew Wilcox
2020-06-09 11:16 ` Greg Kroah-Hartman
2020-06-09 16:58 ` Joe Perches
2020-06-09 17:42 ` Edward Cree
2020-06-09 17:56 ` Joe Perches
2020-06-09 18:08 ` Edward Cree
2020-06-10 6:31 ` Greg Kroah-Hartman
2020-06-10 6:35 ` Joe Perches
2020-06-10 7:09 ` Greg Kroah-Hartman
2020-06-10 7:24 ` Joe Perches
2020-06-10 10:29 ` Stanimir Varbanov
2020-06-10 12:26 ` Greg Kroah-Hartman
2020-06-09 10:45 ` [PATCH v3 2/7] dynamic_debug: Group debug messages by " Stanimir Varbanov
2020-06-09 12:27 ` Petr Mladek
2020-06-09 10:46 ` [PATCH v3 3/7] dev_printk: Add dev_dbg_level macro over dynamic one Stanimir Varbanov
2020-06-09 10:46 ` [PATCH v3 4/7] printk: Add pr_debug_level " Stanimir Varbanov
2020-06-09 11:12 ` Greg Kroah-Hartman
2020-06-09 10:46 ` [PATCH v3 5/7] venus: Add debugfs interface to set firmware log level Stanimir Varbanov
2020-06-09 11:12 ` Greg Kroah-Hartman
2020-06-11 11:51 ` Stanimir Varbanov
2020-06-09 10:46 ` [PATCH v3 6/7] venus: Make debug infrastructure more flexible Stanimir Varbanov
2020-06-09 11:14 ` Greg Kroah-Hartman
2020-06-10 13:29 ` Stanimir Varbanov [this message]
2020-06-10 13:37 ` Greg Kroah-Hartman
2020-06-10 19:49 ` Joe Perches
2020-06-10 20:23 ` Joe Perches
2020-06-11 6:26 ` Greg Kroah-Hartman
2020-06-11 6:42 ` Joe Perches
2020-06-11 10:52 ` Daniel Thompson
2020-06-11 11:31 ` Stanimir Varbanov
2020-06-11 12:18 ` Daniel Thompson
2020-06-11 21:19 ` jim.cromie
2020-06-11 21:59 ` Jason Baron
2020-06-11 22:33 ` Joe Perches
2020-06-12 0:08 ` jim.cromie
2020-06-10 18:32 ` WIP generic module->debug_flags and dynamic_debug jim.cromie
2020-06-10 20:24 ` Joe Perches
2020-06-11 11:26 ` Rasmus Villemoes
2020-06-11 14:09 ` jim.cromie
2020-06-09 10:46 ` [PATCH v3 7/7] venus: Add a debugfs file for SSR trigger Stanimir Varbanov
2020-06-09 11:13 ` [PATCH v3 0/7] Venus dynamic debug Matthew Wilcox
2020-06-09 16:03 ` Randy Dunlap
2020-06-09 16:49 ` Joe Perches
2020-06-09 21:21 ` jim.cromie
2020-06-09 22:23 ` Joe Perches
2020-06-10 1:58 ` Joe Perches
2020-06-10 3:10 ` jim.cromie
2020-06-09 16:40 ` Joe Perches
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