linux-kernel - [PATCH v2 0/2] Enable support for error detection in CSI2RX

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Message-ID: <20250217130013.2802293-1-y-abhilashchandra@ti.com>
Date: Mon, 17 Feb 2025 18:30:11 +0530
From: Yemike Abhilash Chandra <y-abhilashchandra@...com>
To: <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: <mripard@...nel.org>, <mchehab@...nel.org>, <jai.luthra@...ux.dev>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <devarsht@...com>, <vaishnav.a@...com>, <r-donadkar@...com>,
        <u-kumar1@...com>, <y-abhilashchandra@...com>
Subject: [PATCH v2 0/2]  Enable support for error detection in CSI2RX

This patch series enables the csi2rx_err_irq interrupt to record any errors
that occur during streaming. It also adds support for the VIDIOC_LOG_STATUS
ioctl, which outputs the current device status to the kernel log.

The IRQ handler records any errors encountered during streaming.
Additionally, VIDIOC_LOG_STATUS can be invoked from user space to retrieve
the latest status.

Changelog:
Changes in v2:
- Address Krzysztof's review comment to remove flexibility while adding
  interrupts.
- Address Jai's review comment to drop support VIDIOC_LOG_STATUS on a
  video node.
- Address Jai's review comment to get interrupt at probe instead of
  start_stream.
- Address Jai's review comment to change dev_warn to dev_dbg when there
  is no interrupt defined in DT.

V1: https://lore.kernel.org/all/20250212131244.1397722-1-y-abhilashchandra@ti.com/

Logs with interrupt in DT: https://gist.github.com/Yemike-Abhilash-Chandra/fb887bda738da91ea2a24690cd7b0818
Logs without interrupt in DT: https://gist.github.com/Yemike-Abhilash-Chandra/18347df18041e43b78e9738263d77aa9


Yemike Abhilash Chandra (2):
  dt-bindings: media: cdns,csi2rx.yaml: Add optional interrupts for
    cdns-csi2rx
  media: cadence: csi2rx: Enable csi2rx_err_irq interrupt and add
    support for VIDIOC_LOG_STATUS

 .../bindings/media/cdns,csi2rx.yaml           |  10 ++
 drivers/media/platform/cadence/cdns-csi2rx.c  | 102 +++++++++++++++++-
 2 files changed, 111 insertions(+), 1 deletion(-)

-- 
2.34.1