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 77D761F543D; Tue, 21 Jan 2025 18:08:12 +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=1737482892; cv=none; b=C3GPe+g63U3g3i62pZgwL9jhgR+UwS+AAWZa4XAW32AW17H1G9B8AFZpalJf9VpOci6Q3KZx5SnTj1GyYUFycdNISJQOny1Y7OeCZR/JEvpzMLjwckJ2TJrxRhlQEBgvEbs2U9/ThoCDjRb5vzXVlYGhCF9kUEhPAuIWC+EgkKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737482892; c=relaxed/simple; bh=IC9TMpPX4pO+H0gTsV9yGEjoQvHiXffJ+581PPFUR0E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=sStkpSJ/T29QEhxisjV7siM0YTsAZhEI8/aOlQa7pVcvo90RetpndvPs3pYffOABwhKJIWW/CpTUw4jTbLqwVufxsv3i114x73N76tWFa85szDSXoYmTeMKHcLlaOyESOnJzQ/rfV6Kx8hd4mERmwEf/jg+NfV74/8CzMACgxek= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hiQKdcd4; 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="hiQKdcd4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F2B6AC4CEDF; Tue, 21 Jan 2025 18:08:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1737482892; bh=IC9TMpPX4pO+H0gTsV9yGEjoQvHiXffJ+581PPFUR0E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hiQKdcd4ZRr75EqAn4AT5e+KusmHC3O/UGkJ40cFHtT8HjzismsEGYQR3hIGaFGPc qcm80SfoDEvGUM/UhSNMwmGDDbHTyuU1/supKA7Fzwwy7DunYbxisahCA80AwZ+mbV 4BD4LedAhfLH6QC4yprEklQkEdodF2Fw5Ti1+Z5o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Andr=C3=A9=20Draszik?= , Thinh Nguyen Subject: [PATCH 5.15 045/127] usb: dwc3: gadget: fix writing NYET threshold Date: Tue, 21 Jan 2025 18:51:57 +0100 Message-ID: <20250121174531.411617229@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250121174529.674452028@linuxfoundation.org> References: <20250121174529.674452028@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: André Draszik commit 01ea6bf5cb58b20cc1bd159f0cf74a76cf04bb69 upstream. Before writing a new value to the register, the old value needs to be masked out for the new value to be programmed as intended, because at least in some cases the reset value of that field is 0xf (max value). At the moment, the dwc3 core initialises the threshold to the maximum value (0xf), with the option to override it via a DT. No upstream DTs seem to override it, therefore this commit doesn't change behaviour for any upstream platform. Nevertheless, the code should be fixed to have the desired outcome. Do so. Fixes: 80caf7d21adc ("usb: dwc3: add lpm erratum support") Cc: stable@vger.kernel.org # 5.10+ (needs adjustment for 5.4) Signed-off-by: André Draszik Acked-by: Thinh Nguyen Link: https://lore.kernel.org/r/20241209-dwc3-nyet-fix-v2-1-02755683345b@linaro.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/core.h | 1 + drivers/usb/dwc3/gadget.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -430,6 +430,7 @@ #define DWC3_DCTL_TRGTULST_SS_INACT (DWC3_DCTL_TRGTULST(6)) /* These apply for core versions 1.94a and later */ +#define DWC3_DCTL_NYET_THRES_MASK (0xf << 20) #define DWC3_DCTL_NYET_THRES(n) (((n) & 0xf) << 20) #define DWC3_DCTL_KEEP_CONNECT BIT(19) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4004,8 +4004,10 @@ static void dwc3_gadget_conndone_interru WARN_ONCE(DWC3_VER_IS_PRIOR(DWC3, 240A) && dwc->has_lpm_erratum, "LPM Erratum not available on dwc3 revisions < 2.40a\n"); - if (dwc->has_lpm_erratum && !DWC3_VER_IS_PRIOR(DWC3, 240A)) + if (dwc->has_lpm_erratum && !DWC3_VER_IS_PRIOR(DWC3, 240A)) { + reg &= ~DWC3_DCTL_NYET_THRES_MASK; reg |= DWC3_DCTL_NYET_THRES(dwc->lpm_nyet_threshold); + } dwc3_gadget_dctl_write_safe(dwc, reg); } else {