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Message-ID: <5462566.31r3eYUQgx@steina-w>
Date: Tue, 16 Dec 2025 08:34:18 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Philipp Zabel <p.zabel@...gutronix.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>, Rui Miguel Silva <rmfrfs@...il.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Martin Kepplinger-Novakovic <martink@...teo.de>,
Purism Kernel Team <kernel@...i.sm>, linux-arm-kernel@...ts.infradead.org
Cc: linux-media@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Frank Li <Frank.Li@....com>, Frank Li <Frank.Li@....com>
Subject: Re: [PATCH v3 2/5] media: nxp: use dev_err_probe() to simplify code
Hi,
Am Montag, 15. Dezember 2025, 23:49:53 CET schrieb Frank Li:
> Use dev_err_probe() to simplify the code. Drop the explicit error message
> after returning from imx8mq_mipi_csi_parse_dt(), as the error is already
> reported by this helper.
>
> No functional change.
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> change in v2:
> - add Laurent Pinchart review tags
> - wrap error message to new line
> - remove error code print in dev_err_probe();
> - drop error messaage at imx8mq_mipi_csi_parse_dt()
> ---
> drivers/media/platform/nxp/imx-mipi-csis.c | 6 ++---
> drivers/media/platform/nxp/imx7-media-csi.c | 14 ++++--------
> drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 33 ++++++++++++---------------
> 3 files changed, 21 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
> index 088b2945aee33731c565f049dd17721356300b84..ce93d868746f002c22e2f86b1e0aa84ec1a76061 100644
> --- a/drivers/media/platform/nxp/imx-mipi-csis.c
> +++ b/drivers/media/platform/nxp/imx-mipi-csis.c
> @@ -1547,10 +1547,8 @@ static int mipi_csis_probe(struct platform_device *pdev)
> /* Now that the hardware is initialized, request the interrupt. */
> ret = devm_request_irq(dev, irq, mipi_csis_irq_handler, 0,
> dev_name(dev), csis);
> - if (ret) {
> - dev_err(dev, "Interrupt request failed\n");
> - return ret;
> - }
> + if (ret)
> + return dev_err_probe(dev, ret, "Interrupt request failed\n");
>
> /* Initialize and register the subdev. */
> ret = mipi_csis_subdev_init(csis);
> diff --git a/drivers/media/platform/nxp/imx7-media-csi.c b/drivers/media/platform/nxp/imx7-media-csi.c
> index 933a5f39f9f4c9b43ca8d2a1819d0145981266e6..7ddc7ba06e3d4e007013821f67d783898a15461f 100644
> --- a/drivers/media/platform/nxp/imx7-media-csi.c
> +++ b/drivers/media/platform/nxp/imx7-media-csi.c
> @@ -2218,11 +2218,9 @@ static int imx7_csi_probe(struct platform_device *pdev)
>
> /* Acquire resources and install interrupt handler. */
> csi->mclk = devm_clk_get(&pdev->dev, "mclk");
> - if (IS_ERR(csi->mclk)) {
> - ret = PTR_ERR(csi->mclk);
> - dev_err(dev, "Failed to get mclk: %d", ret);
> - return ret;
> - }
> + if (IS_ERR(csi->mclk))
> + return dev_err_probe(dev, PTR_ERR(csi->mclk),
> + "Failed to get mclk\n");
>
> csi->irq = platform_get_irq(pdev, 0);
> if (csi->irq < 0)
> @@ -2236,10 +2234,8 @@ static int imx7_csi_probe(struct platform_device *pdev)
>
> ret = devm_request_irq(dev, csi->irq, imx7_csi_irq_handler, 0, "csi",
> (void *)csi);
> - if (ret < 0) {
> - dev_err(dev, "Request CSI IRQ failed.\n");
> - return ret;
> - }
> + if (ret < 0)
> + return dev_err_probe(dev, ret, "Request CSI IRQ failed.\n");
>
> /* Initialize all the media device infrastructure. */
> ret = imx7_csi_media_init(csi);
> diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> index 0851f4a9ae52d3096f454da643cfdc5017e000b1..a007c582b4d91660a97910a6a0d53c9b6fcd73e9 100644
> --- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> +++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> @@ -951,10 +951,9 @@ static int imx8mq_mipi_csi_parse_dt(struct csi_state *state)
> int ret = 0;
>
> state->rst = devm_reset_control_array_get_exclusive(dev);
> - if (IS_ERR(state->rst)) {
> - dev_err(dev, "Failed to get reset: %pe\n", state->rst);
> - return PTR_ERR(state->rst);
> - }
> + if (IS_ERR(state->rst))
> + return dev_err_probe(dev, PTR_ERR(state->rst),
> + "Failed to get reset\n");
>
> if (state->pdata->use_reg_csr) {
> const struct regmap_config regmap_config = {
> @@ -977,24 +976,22 @@ static int imx8mq_mipi_csi_parse_dt(struct csi_state *state)
>
> ret = of_property_read_u32_array(np, "fsl,mipi-phy-gpr", out_val,
> ARRAY_SIZE(out_val));
> - if (ret) {
> - dev_err(dev, "no fsl,mipi-phy-gpr property found: %d\n", ret);
> - return ret;
> - }
> + if (ret)
> + return dev_err_probe(dev, ret, "no %s property found\n",
> + "fsl,mipi-phy-gpr");
Do you really need to pass the (fixed) property name as an argument? Why
not move into the const string directly? I would also rephrase it a bit:
"property fsl,mipi-phy-gpr not found"
With that fixed:
Reviewed-by: Alexander Stein <alexander.stein@...tq-group.com>
>
> ph = *out_val;
>
> node = of_find_node_by_phandle(ph);
> - if (!node) {
> - dev_err(dev, "Error finding node by phandle\n");
> - return -ENODEV;
> - }
> + if (!node)
> + return dev_err_probe(dev, -ENODEV,
> + "Error finding node by phandle\n");
> +
> state->phy_gpr = syscon_node_to_regmap(node);
> of_node_put(node);
> - if (IS_ERR(state->phy_gpr)) {
> - dev_err(dev, "failed to get gpr regmap: %pe\n", state->phy_gpr);
> - return PTR_ERR(state->phy_gpr);
> - }
> + if (IS_ERR(state->phy_gpr))
> + return dev_err_probe(dev, PTR_ERR(state->phy_gpr),
> + "failed to get gpr regmap\n");
>
> state->phy_gpr_reg = out_val[1];
> dev_dbg(dev, "phy gpr register set to 0x%x\n", state->phy_gpr_reg);
> @@ -1017,10 +1014,8 @@ static int imx8mq_mipi_csi_probe(struct platform_device *pdev)
> state->pdata = of_device_get_match_data(dev);
>
> ret = imx8mq_mipi_csi_parse_dt(state);
> - if (ret < 0) {
> - dev_err(dev, "Failed to parse device tree: %d\n", ret);
> + if (ret < 0)
> return ret;
> - }
>
> /* Acquire resources. */
> state->regs = devm_platform_ioremap_resource(pdev, 0);
>
>
--
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