From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CF4C624E4A1; Mon, 13 Apr 2026 16:39:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098377; cv=none; b=danZfkEuc/O6/jWaCKCKiZ59toUEhsnBbcuT3zwc/CAic2zbcyd3fWuK/5GvmUEdcH1grrWOqf82qtXdfPtNv8VqbysZ0EloyFHNqxDPoG3UayxxA7qJF6wyBoBIU+/defHgnENAAdY3aKamZot3JFp+umLuq+3CjUMeXG9ZYMM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098377; c=relaxed/simple; bh=TdXGnA4kEGiUdUZAwqUxQGViaYQhhknGe6LBc2o8u3s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=peYvKPwD/7jXlT5g5dwAKj6PDEz8qUVypKSRLhIOlg42uLAyvfHUAUmrRethdoGN3Ltl0yJ+913SNZ9L6Qs9OTfhb7NnmayPH5x8F8LrB7Kz3HWI7axp/RPAk5OMZoxrZIYP93mGuzAwibh1/mXj/Sqs7EJqOi/OPasC5qbzUXI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CHlRS0od; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="CHlRS0od" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66642C2BCAF; Mon, 13 Apr 2026 16:39:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776098377; bh=TdXGnA4kEGiUdUZAwqUxQGViaYQhhknGe6LBc2o8u3s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CHlRS0odd57koPsjRXID9WkGcWw4O4AAxXxCCIH7zIr1Lasr0iMhirRZ/1/oBBiyS dhYePLSlBZ/5gfvqsyh9KEBSMDM4IYGoMEj4C+r/4LeCVKVaaijkkiRpRTBFrQebat mbyj3tBE4ZzUPMBtd3AkQXU2+jzknbw4R3jAccBo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yoshihiro Shimoda , Lad Prabhakar , Claudiu Beznea , Vinod Koul , Sasha Levin Subject: [PATCH 5.15 474/570] phy: renesas: rcar-gen3-usb2: Fix role detection on unbind/bind Date: Mon, 13 Apr 2026 18:00:05 +0200 Message-ID: <20260413155848.219066068@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Claudiu Beznea commit 54c4c58713aaff76c2422ff5750e557ab3b100d7 upstream. It has been observed on the Renesas RZ/G3S SoC that unbinding and binding the PHY driver leads to role autodetection failures. This issue occurs when PHY 3 is the first initialized PHY. PHY 3 does not have an interrupt associated with the USB2_INT_ENABLE register (as rcar_gen3_int_enable[3] = 0). As a result, rcar_gen3_init_otg() is called to initialize OTG without enabling PHY interrupts. To resolve this, add rcar_gen3_is_any_otg_rphy_initialized() and call it in role_store(), role_show(), and rcar_gen3_init_otg(). At the same time, rcar_gen3_init_otg() is only called when initialization for a PHY with interrupt bits is in progress. As a result, the struct rcar_gen3_phy::otg_initialized is no longer needed. [claudiu.beznea: declare the i iterrator from rcar_gen3_is_any_otg_rphy_initialized() outside of for loop] Fixes: 549b6b55b005 ("phy: renesas: rcar-gen3-usb2: enable/disable independent irqs") Cc: stable@vger.kernel.org Reviewed-by: Yoshihiro Shimoda Tested-by: Yoshihiro Shimoda Reviewed-by: Lad Prabhakar Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/20250507125032.565017-2-claudiu.beznea.uj@bp.renesas.com Signed-off-by: Vinod Koul Signed-off-by: Claudiu Beznea Signed-off-by: Sasha Levin --- drivers/phy/renesas/phy-rcar-gen3-usb2.c | 32 +++++++++++------------- 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c index 670514d44fe3f..8c03b683ba1c9 100644 --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c @@ -103,7 +103,6 @@ struct rcar_gen3_phy { struct rcar_gen3_chan *ch; u32 int_enable_bits; bool initialized; - bool otg_initialized; bool powered; }; @@ -311,16 +310,16 @@ static bool rcar_gen3_is_any_rphy_initialized(struct rcar_gen3_chan *ch) return false; } -static bool rcar_gen3_needs_init_otg(struct rcar_gen3_chan *ch) +static bool rcar_gen3_is_any_otg_rphy_initialized(struct rcar_gen3_chan *ch) { - int i; + enum rcar_gen3_phy_index i; - for (i = 0; i < NUM_OF_PHYS; i++) { - if (ch->rphys[i].otg_initialized) - return false; + for (i = PHY_INDEX_BOTH_HC; i <= PHY_INDEX_EHCI; i++) { + if (ch->rphys[i].initialized) + return true; } - return true; + return false; } static bool rcar_gen3_are_all_rphys_power_off(struct rcar_gen3_chan *ch) @@ -342,7 +341,7 @@ static ssize_t role_store(struct device *dev, struct device_attribute *attr, bool is_b_device; enum phy_mode cur_mode, new_mode; - if (!ch->is_otg_channel || !rcar_gen3_is_any_rphy_initialized(ch)) + if (!ch->is_otg_channel || !rcar_gen3_is_any_otg_rphy_initialized(ch)) return -EIO; if (sysfs_streq(buf, "host")) @@ -380,7 +379,7 @@ static ssize_t role_show(struct device *dev, struct device_attribute *attr, { struct rcar_gen3_chan *ch = dev_get_drvdata(dev); - if (!ch->is_otg_channel || !rcar_gen3_is_any_rphy_initialized(ch)) + if (!ch->is_otg_channel || !rcar_gen3_is_any_otg_rphy_initialized(ch)) return -EIO; return sprintf(buf, "%s\n", rcar_gen3_is_host(ch) ? "host" : @@ -393,6 +392,9 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch) void __iomem *usb2_base = ch->base; u32 val; + if (!ch->is_otg_channel || rcar_gen3_is_any_otg_rphy_initialized(ch)) + return; + /* Should not use functions of read-modify-write a register */ val = readl(usb2_base + USB2_LINECTRL1); val = (val & ~USB2_LINECTRL1_DP_RPD) | USB2_LINECTRL1_DPRPD_EN | @@ -459,12 +461,9 @@ static int rcar_gen3_phy_usb2_init(struct phy *p) writel(USB2_OC_TIMSET_INIT, usb2_base + USB2_OC_TIMSET); } - /* Initialize otg part */ - if (channel->is_otg_channel) { - if (rcar_gen3_needs_init_otg(channel)) - rcar_gen3_init_otg(channel); - rphy->otg_initialized = true; - } + /* Initialize otg part (only if we initialize a PHY with IRQs). */ + if (rphy->int_enable_bits) + rcar_gen3_init_otg(channel); rphy->initialized = true; @@ -480,9 +479,6 @@ static int rcar_gen3_phy_usb2_exit(struct phy *p) rphy->initialized = false; - if (channel->is_otg_channel) - rphy->otg_initialized = false; - val = readl(usb2_base + USB2_INT_ENABLE); val &= ~rphy->int_enable_bits; if (!rcar_gen3_is_any_rphy_initialized(channel)) -- 2.53.0