From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 65D744252A2 for ; Tue, 7 Jul 2026 14:31:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783434709; cv=none; b=CawpfL33TEDo3jCm4dr0mHzXsOh1jCEojE0vA6RP2G/3dCbsGYwM4bFas0QFbUPwB6edW+/G7fe2J97Ah32f9+2Ku5YGhOsQPzUlLlL6I4xXrAmSvsRngpZ4iY3B/zbbJ37n8ol9ENGXxYM0OeM9Ual7ANkiLtNXNam9RcILjYk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783434709; c=relaxed/simple; bh=Iman9nOIH/2I+aNBeG4ZcI05TOjqjMkAnVAen8LIHqo=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=atj+tTtIsl8R3sDjqxmDfvhgU2jVysTruDDei9y0JtvVsLV9Z1DXewUzs4+oCVYFfkG+gVVOdaZqScb849Jd3Q1Ohh26ueifzab4LWS67CDDkLCETYYl+tYPtS63YPTlDkK1qAQZLvE5zqoC0v9LLwnrprrI390qTfGQONtHe8k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ofSHB/xG; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ofSHB/xG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC76D1F000E9; Tue, 7 Jul 2026 14:31:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783434708; bh=UTzP3gor4dFCMU5pkveJq/KGXMait3zUs+q1bohN9bY=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=ofSHB/xGOKCHFOR+9Wd78qQhTsbKDZDssxAZTBGlXnKgTzX7BhDOtaisof5ONulNX /JlnkC4IGWMQD28KfhNZbU5pHmeV6w4DlA+ca4F8Thd6Y5MtCcV7nk5wYSaeMCMql3 a6feKMNV+X3r9L6vd55NwRN22N0IiwggUiJKnrjR/M2aZZYqg6ihkwokhwBjbZeFyM eOQfMLYunt4nKJIQvmYgKBK+jEjN5eAk3CxbuWwmKsqE7W3ENhS/eIGtrgMfHnq4rR NBCWTlPzecwBXEl03cK0LIPiKAR5zEQBlLDX/VZdyGMhc2ni2+XmJkYoeDezCaJa/X MhAklJLg8U7Sw== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 03/12] phy: phy-mtk-dp: Allow probing with devicetree match Reply-To: sashiko-reviews@lists.linux.dev To: "AngeloGioacchino Del Regno" Cc: olteanv@gmail.com, neil.armstrong@linaro.org, linux-phy@lists.infradead.org, vkoul@kernel.org, robh@kernel.org, conor+dt@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org In-Reply-To: <20260707141931.191172-4-angelogioacchino.delregno@collabora.com> References: <20260707141931.191172-1-angelogioacchino.delregno@collabora.com> <20260707141931.191172-4-angelogioacchino.delregno@collabora.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 07 Jul 2026 14:31:47 +0000 Message-Id: <20260707143147.AC76D1F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Thank you for your contribution! Sashiko AI review found 3 potential issue(= s) to consider: - [High] PM Runtime on the parent device is enabled after the PHY device is= created, preventing PM runtime from propagating to the parent and causing = unpowered hardware accesses. - [Medium] The DP PHY driver fails to parse and apply the `nvmem-cells` cal= ibration data specified in the new device tree binding. - [Low] The variable `ret` is used but not declared in `mtk_dp_phy_probe()`= , causing a build failure. -- --- Patch [3]: [PATCH v2 03/12] phy: phy-mtk-dp: Allow probing with devicet= ree match --- commit e7cb0174c7cb05364cf12874f491ce4c799f2c61 Author: AngeloGioacchino Del Regno phy: phy-mtk-dp: Allow probing with devicetree match This commit adds a devicetree match to decouple the MediaTek DP PHY driver from the DisplayPort IP driver. It implements a standalone probe path while retaining a legacy probe function for backwards compatibility. > diff --git a/drivers/phy/mediatek/phy-mtk-dp.c b/drivers/phy/mediatek/phy= -mtk-dp.c > --- a/drivers/phy/mediatek/phy-mtk-dp.c > +++ b/drivers/phy/mediatek/phy-mtk-dp.c [ ... ] > @@ -160,43 +161,106 @@ static const struct phy_ops mtk_dp_phy_dev_ops =3D= { [ ... ] > static int mtk_dp_phy_probe(struct platform_device *pdev) > { > struct device *dev =3D &pdev->dev; > + struct phy_provider *provider; > struct mtk_dp_phy *dp_phy; > + void __iomem *base; > struct phy *phy; > - struct regmap *regs; > - > - regs =3D *(struct regmap **)dev->platform_data; > - if (!regs) > - return dev_err_probe(dev, -EINVAL, > - "No data passed, requires struct regmap**\n"); > =20 > dp_phy =3D devm_kzalloc(dev, sizeof(*dp_phy), GFP_KERNEL); > if (!dp_phy) > return -ENOMEM; > =20 > - dp_phy->regmap =3D regs; > + dp_phy->dev =3D dev; > + > + /* If there's no devicetree, go for legacy pdev probe */ > + if (!dev->of_node) > + return mtk_dp_phy_legacy_probe(pdev, dp_phy); [Severity: Medium] Does the new devicetree probe path need to parse and apply the nvmem-cells calibration data? It looks like the new DT bindings specify nvmem-cells for optimal EYE signal pattern calibration, but the standalone probe path doesn't retrieve them, which might leave the hardware running with sub-optimal defaults. > + > + base =3D devm_platform_ioremap_resource(pdev, 0); > + if (IS_ERR(base)) > + return PTR_ERR(base); > + > + dp_phy->regmap =3D devm_regmap_init_mmio(dev, base, &mtk_dp_phy_regmap_= cfg); > + if (IS_ERR(dp_phy->regmap)) > + return PTR_ERR(dp_phy->regmap); > + > phy =3D devm_phy_create(dev, NULL, &mtk_dp_phy_dev_ops); [Severity: High] Will creating the PHY device before enabling PM runtime on the parent prevent the PHY framework from propagating PM runtime to the child PHY device? In phy_create(), the framework checks pm_runtime_enabled(dev) on the parent to decide whether to enable PM runtime on the newly created PHY device. Sin= ce devm_pm_runtime_enable(dev) is called later, this check evaluates to false. Could this lead to phy_pm_runtime_get_sync() returning -ENOTSUPP and bypassing hardware wake-ups, resulting in unpowered register accesses? > if (IS_ERR(phy)) > return dev_err_probe(dev, PTR_ERR(phy), > "Failed to create DP PHY\n"); > =20 > phy_set_drvdata(phy, dp_phy); > - if (!dev->of_node) > - phy_create_lookup(phy, "dp", dev_name(dev)); > + > + provider =3D devm_of_phy_provider_register(dev, of_phy_simple_xlate); > + if (IS_ERR(provider)) > + return PTR_ERR(provider); > + > + ret =3D devm_pm_runtime_enable(dev); > + if (ret) > + return ret; [Severity: Low] Is the variable ret missing a declaration here? It appears int ret; is not declared in mtk_dp_phy_probe(), which will cause a build failure when compiling the driver. > =20 > return 0; > } --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260707141931.1911= 72-1-angelogioacchino.delregno@collabora.com?part=3D3 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E0E7DC44501 for ; Tue, 7 Jul 2026 14:31:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: 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smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 45A9841128; Tue, 7 Jul 2026 14:31:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC76D1F000E9; Tue, 7 Jul 2026 14:31:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783434708; bh=UTzP3gor4dFCMU5pkveJq/KGXMait3zUs+q1bohN9bY=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=ofSHB/xGOKCHFOR+9Wd78qQhTsbKDZDssxAZTBGlXnKgTzX7BhDOtaisof5ONulNX /JlnkC4IGWMQD28KfhNZbU5pHmeV6w4DlA+ca4F8Thd6Y5MtCcV7nk5wYSaeMCMql3 a6feKMNV+X3r9L6vd55NwRN22N0IiwggUiJKnrjR/M2aZZYqg6ihkwokhwBjbZeFyM eOQfMLYunt4nKJIQvmYgKBK+jEjN5eAk3CxbuWwmKsqE7W3ENhS/eIGtrgMfHnq4rR NBCWTlPzecwBXEl03cK0LIPiKAR5zEQBlLDX/VZdyGMhc2ni2+XmJkYoeDezCaJa/X MhAklJLg8U7Sw== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 03/12] phy: phy-mtk-dp: Allow probing with devicetree match To: "AngeloGioacchino Del Regno" Cc: olteanv@gmail.com, neil.armstrong@linaro.org, linux-phy@lists.infradead.org, vkoul@kernel.org, robh@kernel.org, conor+dt@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org In-Reply-To: <20260707141931.191172-4-angelogioacchino.delregno@collabora.com> References: <20260707141931.191172-1-angelogioacchino.delregno@collabora.com> <20260707141931.191172-4-angelogioacchino.delregno@collabora.com> Date: Tue, 07 Jul 2026 14:31:47 +0000 Message-Id: <20260707143147.AC76D1F000E9@smtp.kernel.org> X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org VGhhbmsgeW91IGZvciB5b3VyIGNvbnRyaWJ1dGlvbiEgU2FzaGlrbyBBSSByZXZpZXcgZm91bmQg 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