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Message-Id: <D5IH6BLY7FH2.CFMD6AKWASJP@cknow.org>
Date: Sun, 10 Nov 2024 12:51:15 +0100
From: "Diederik de Haas" <didi.debian@...ow.org>
To: "Heiko Stuebner" <heiko@...ech.de>, <dsimic@...jaro.org>,
<linux-rockchip@...ts.infradead.org>, <dri-devel@...ts.freedesktop.org>
Cc: <andy.yan@...k-chips.com>, <maarten.lankhorst@...ux.intel.com>,
<mripard@...nel.org>, <tzimmermann@...e.de>,
<linux-kernel@...r.kernel.org>, "Heiko Stuebner" <heiko.stuebner@...rry.de>
Subject: Re: [PATCH] drm/rockchip: dsi: convert to dev_err_probe in probe
function
Hi Heiko,
On Fri Nov 8, 2024 at 3:44 PM CET, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@...rry.de>
>
> DRM_DEV_ERROR is deprecated and using dev_err_probe saves quite a number
> of lines too, so convert the error prints for the dsi-driver.
>
> Signed-off-by: Heiko Stuebner <heiko.stuebner@...rry.de>
> ---
> .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 80 ++++++-------------
> 1 file changed, 26 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> index 58a44af0e9ad..3224ab749352 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> @@ -1356,17 +1356,15 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
> struct resource *res;
> const struct rockchip_dw_dsi_chip_data *cdata =
> of_device_get_match_data(dev);
> - int ret, i;
> + int i;
>
> dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> if (!dsi)
> return -ENOMEM;
>
> dsi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
> - if (IS_ERR(dsi->base)) {
> - DRM_DEV_ERROR(dev, "Unable to get dsi registers\n");
> - return PTR_ERR(dsi->base);
> - }
> + if (IS_ERR(dsi->base))
> + return dev_err_probe(dev, PTR_ERR(dsi->base), "Unable to get dsi registers\n");
>
> i = 0;
> while (cdata[i].reg) {
> @@ -1378,67 +1376,47 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
> i++;
> }
>
> - if (!dsi->cdata) {
> - DRM_DEV_ERROR(dev, "no dsi-config for %s node\n", np->name);
> - return -EINVAL;
> - }
> + if (!dsi->cdata)
> + return dev_err_probe(dev, -EINVAL, "No dsi-config for %s node\n", np->name);
>
> /* try to get a possible external dphy */
> dsi->phy = devm_phy_optional_get(dev, "dphy");
> - if (IS_ERR(dsi->phy)) {
> - ret = PTR_ERR(dsi->phy);
> - DRM_DEV_ERROR(dev, "failed to get mipi dphy: %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(dsi->phy))
> + return dev_err_probe(dev, PTR_ERR(dsi->phy), "Failed to get mipi dphy\n");
One small remark/question: wouldn't the recently introduced [1]
dev_warn_probe be more appropriate here, given that "dphy" is optional?
But besides that, the 'conversion' to use dev_err_probe was done
consistently and in line with other dev_err_probe conversions and looks
much cleaner and thus better then the previous code. Thanks!
Feel free to add my
Reviewed-by: Diederik de Haas <didi.debian@...ow.org>
[1] https://lore.kernel.org/linux-rockchip/2be0a28538bb2a3d1bcc91e2ca1f2d0dc09146d9.1727601608.git.dsimic@manjaro.org/
>
> dsi->pclk = devm_clk_get(dev, "pclk");
> - if (IS_ERR(dsi->pclk)) {
> - ret = PTR_ERR(dsi->pclk);
> - DRM_DEV_ERROR(dev, "Unable to get pclk: %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(dsi->pclk))
> + return dev_err_probe(dev, PTR_ERR(dsi->pclk), "Unable to get pclk\n");
>
> dsi->pllref_clk = devm_clk_get(dev, "ref");
> if (IS_ERR(dsi->pllref_clk)) {
> - if (dsi->phy) {
> + if (dsi->phy)
> /*
> * if external phy is present, pll will be
> * generated there.
> */
> dsi->pllref_clk = NULL;
> - } else {
> - ret = PTR_ERR(dsi->pllref_clk);
> - DRM_DEV_ERROR(dev,
> - "Unable to get pll reference clock: %d\n",
> - ret);
> - return ret;
> - }
> + else
> + return dev_err_probe(dev, PTR_ERR(dsi->pllref_clk),
> + "Unable to get pll reference clock\n");
> }
>
> if (dsi->cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
> dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> - if (IS_ERR(dsi->phy_cfg_clk)) {
> - ret = PTR_ERR(dsi->phy_cfg_clk);
> - DRM_DEV_ERROR(dev,
> - "Unable to get phy_cfg_clk: %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(dsi->phy_cfg_clk))
> + return dev_err_probe(dev, PTR_ERR(dsi->phy_cfg_clk),
> + "Unable to get phy_cfg_clk\n");
> }
>
> if (dsi->cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
> dsi->grf_clk = devm_clk_get(dev, "grf");
> - if (IS_ERR(dsi->grf_clk)) {
> - ret = PTR_ERR(dsi->grf_clk);
> - DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(dsi->grf_clk))
> + return dev_err_probe(dev, PTR_ERR(dsi->grf_clk), "Unable to get grf_clk\n");
> }
>
> dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> - if (IS_ERR(dsi->grf_regmap)) {
> - DRM_DEV_ERROR(dev, "Unable to get rockchip,grf\n");
> - return PTR_ERR(dsi->grf_regmap);
> - }
> + if (IS_ERR(dsi->grf_regmap))
> + return dev_err_probe(dev, PTR_ERR(dsi->grf_regmap), "Unable to get rockchip,grf\n");
>
> dsi->dev = dev;
> dsi->pdata.base = dsi->base;
> @@ -1451,24 +1429,18 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
> mutex_init(&dsi->usage_mutex);
>
> dsi->dphy = devm_phy_create(dev, NULL, &dw_mipi_dsi_dphy_ops);
> - if (IS_ERR(dsi->dphy)) {
> - DRM_DEV_ERROR(&pdev->dev, "failed to create PHY\n");
> - return PTR_ERR(dsi->dphy);
> - }
> + if (IS_ERR(dsi->dphy))
> + return dev_err_probe(dev, PTR_ERR(dsi->dphy), "Failed to create PHY\n");
>
> phy_set_drvdata(dsi->dphy, dsi);
> phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> if (IS_ERR(phy_provider))
> - return PTR_ERR(phy_provider);
> + return dev_err_probe(dev, PTR_ERR(phy_provider),
> + "Failed to register phy-provider\n");
>
> dsi->dmd = dw_mipi_dsi_probe(pdev, &dsi->pdata);
> - if (IS_ERR(dsi->dmd)) {
> - ret = PTR_ERR(dsi->dmd);
> - if (ret != -EPROBE_DEFER)
> - DRM_DEV_ERROR(dev,
> - "Failed to probe dw_mipi_dsi: %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(dsi->dmd))
> + return dev_err_probe(dev, PTR_ERR(dsi->dmd), "Failed to probe dw_mipi_dsi\n");
>
> return 0;
> }
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