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 36BA17474 for ; Tue, 10 Jan 2023 18:13:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF05CC433F1; Tue, 10 Jan 2023 18:13:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673374413; bh=kA1+UNpEGUxVyc3LQN4UpqcozozRaRV5EtErDfZHdjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eaOJLP7OeiCuzNFOHcBwc9tvRs4+88JjdkoRTQjS8fThUgzVLNn5Ne2cV7DVtEAT7 oaLelY84d6JoWOvMXLJiktx0J5XkoHZTOYr/UHqSSmvh+vFtmogOmFSaRXsi4YfLH8 J6ArfEQMF0Jn3Pd9T8DP0si6WSsrYQDxsJSVoFlk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dmitry Baryshkov , Johan Hovold , Vinod Koul , Sasha Levin Subject: [PATCH 6.1 010/159] phy: qcom-qmp-combo: fix broken power on Date: Tue, 10 Jan 2023 19:02:38 +0100 Message-Id: <20230110180018.632849662@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230110180018.288460217@linuxfoundation.org> References: <20230110180018.288460217@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Johan Hovold [ Upstream commit 7a7d86d14d073dfa3429c550667a8e78b99edbd4 ] The PHY is powered on during phy-init by setting the SW_PWRDN bit in the COM_POWER_DOWN_CTRL register and then setting the same bit in the in the PCS_POWER_DOWN_CONTROL register that belongs to the USB part of the PHY. Currently, whether power on succeeds depends on probe order and having the USB part of the PHY be initialised first. In case the DP part of the PHY is instead initialised first, the intended power on of the USB block results in a corrupted DP_PHY register (e.g. DP_PHY_AUX_CFG8). Add a pointer to the USB part of the PHY to the driver data and use that to power on the PHY also if the DP part of the PHY is initialised first. Fixes: 52e013d0bffa ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy") Cc: stable@vger.kernel.org # 5.10 Reviewed-by: Dmitry Baryshkov Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20221114081346.5116-5-johan+linaro@kernel.org Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c index 91f8ee79000d..adcda7762acf 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c @@ -955,6 +955,7 @@ struct qcom_qmp { struct regulator_bulk_data *vregs; struct qmp_phy **phys; + struct qmp_phy *usb_phy; struct mutex phy_mutex; int init_count; @@ -1978,7 +1979,7 @@ static int qmp_combo_com_init(struct qmp_phy *qphy) { struct qcom_qmp *qmp = qphy->qmp; const struct qmp_phy_cfg *cfg = qphy->cfg; - void __iomem *pcs = qphy->pcs; + struct qmp_phy *usb_phy = qmp->usb_phy; void __iomem *dp_com = qmp->dp_com; int ret; @@ -2031,13 +2032,13 @@ static int qmp_combo_com_init(struct qmp_phy *qphy) qphy_clrbits(dp_com, QPHY_V3_DP_COM_SWI_CTRL, 0x03); qphy_clrbits(dp_com, QPHY_V3_DP_COM_SW_RESET, SW_RESET); - if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) - qphy_setbits(pcs, - cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], - cfg->pwrdn_ctrl); + if (usb_phy->cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) + qphy_setbits(usb_phy->pcs, + usb_phy->cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], + usb_phy->cfg->pwrdn_ctrl); else - qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL, - cfg->pwrdn_ctrl); + qphy_setbits(usb_phy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL, + usb_phy->cfg->pwrdn_ctrl); mutex_unlock(&qmp->phy_mutex); @@ -2925,6 +2926,8 @@ static int qmp_combo_probe(struct platform_device *pdev) goto err_node_put; } + qmp->usb_phy = qmp->phys[id]; + /* * Register the pipe clock provided by phy. * See function description to see details of this pipe clock. @@ -2940,6 +2943,9 @@ static int qmp_combo_probe(struct platform_device *pdev) id++; } + if (!qmp->usb_phy) + return -EINVAL; + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); -- 2.35.1