From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Praveen Talari <praveen.talari@oss.qualcomm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jirislaby@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org,
Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>,
Aniket Randive <aniket.randive@oss.qualcomm.com>,
chandana.chiluveru@oss.qualcomm.com,
jyothi.seerapu@oss.qualcomm.com
Subject: Re: [PATCH v2 2/2] serial: qcom-geni: Add tracepoints for Qualcomm GENI serial driver
Date: Mon, 18 May 2026 15:41:51 +0200 [thread overview]
Message-ID: <a5cbe0f6-bb58-4d73-a5d9-5680accb25b9@oss.qualcomm.com> (raw)
In-Reply-To: <20260512-add-tracepoints-for-qcom-geni-serial-v2-2-a5726421b3af@oss.qualcomm.com>
On 5/12/26 7:14 PM, Praveen Talari wrote:
> Add tracing to the Qualcomm GENI serial driver to improve runtime
> observability.
>
> Trace hooks are added at key points including termios and clock
> configuration, manual control get/set, interrupt handling, and data
> TX/RX paths.
>
> Usage examples:
>
> Enable all serial traces:
> echo 1 > /sys/kernel/debug/tracing/events/qcom_geni_serial/enable
> cat /sys/kernel/debug/tracing/trace_pipe
>
> Example trace output:
>
> 2517.938432: geni_serial_clk_cfg: a94000.serial: desired_rate=1843200
> clk_rate=7372800 clk_div=4 clk_idx=0
> 2517.938753: geni_serial_irq: a94000.serial: m_irq=0x88800000
> s_irq=0x08000111 dma_tx=0x00000000 dma_rx=0x00000000
> 2517.938803: geni_serial_set_termios: a94000.serial: baud=115200 bpc=8
> tx_trans=0x00000002 tx_par=0x00000000 rx_trans=0x00000000
> rx_par=0x00000000 stop=0
> 2517.938807: geni_serial_set_mctrl: a94000.serial: mctrl=0x8006
> uart_manual_rfr=0x00000000
> 2517.938818: geni_serial_get_mctrl: a94000.serial: mctrl=0x0160
> geni_ios=0x00000001
> 2517.939165: geni_serial_irq: a94000.serial: m_irq=0x00400000
> s_irq=0x00000000 dma_tx=0x00000000 dma_rx=0x00000000
> 2517.939592: geni_serial_tx_data: a94000.serial: tx_len=8 data=61 62 63
> 64 65 66 67 68
> 2517.940610: geni_serial_irq: a94000.serial: m_irq=0x00000001
> s_irq=0x00000000 dma_tx=0x00000003 dma_rx=0x00000000
> 2517.942174: geni_serial_irq: a94000.serial: m_irq=0x08000000
> s_irq=0x08000100 dma_tx=0x00000000 dma_rx=0x00000003
> 2517.942323: geni_serial_rx_data: a94000.serial: rx_len=8 data=61 62 63
> 64 65 66 67 68
> 2517.942680: geni_serial_set_mctrl: a94000.serial: mctrl=0x8000
> uart_manual_rfr=0x80000002
I think the example (or at least the data that it produces) could go
under the --- line, there's plenty of docs regarding tracing on
docs.kernel.org
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
prev parent reply other threads:[~2026-05-18 13:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 17:14 [PATCH v2 0/2] Add tracepoints support for Qualcomm GENI Serial drivers Praveen Talari
2026-05-12 17:14 ` [PATCH v2 1/2] serial: qcom-geni: trace: Add tracepoint support for Qualcomm GENI serial Praveen Talari
2026-05-18 13:40 ` Konrad Dybcio
2026-05-18 13:48 ` Konrad Dybcio
2026-05-12 17:14 ` [PATCH v2 2/2] serial: qcom-geni: Add tracepoints for Qualcomm GENI serial driver Praveen Talari
2026-05-18 13:41 ` Konrad Dybcio [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a5cbe0f6-bb58-4d73-a5d9-5680accb25b9@oss.qualcomm.com \
--to=konrad.dybcio@oss.qualcomm.com \
--cc=aniket.randive@oss.qualcomm.com \
--cc=chandana.chiluveru@oss.qualcomm.com \
--cc=gregkh@linuxfoundation.org \
--cc=jirislaby@kernel.org \
--cc=jyothi.seerapu@oss.qualcomm.com \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=mhiramat@kernel.org \
--cc=mukesh.savaliya@oss.qualcomm.com \
--cc=praveen.talari@oss.qualcomm.com \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®