From patchwork Fri Dec 13 13:53:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam via B4 Relay X-Patchwork-Id: 850858 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 436D91E1021; Fri, 13 Dec 2024 13:53:36 +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=1734098017; cv=none; b=przH49Ugaq/i/Rahsil4x3uTBGMIumzihSE9A5K+USlGdiK1+2zh+zrrmlY/BDDwSOCreR2Y1OIU5WyKPrk2dB+PwYsgcWJ5kRj/tkXslxe7WDY3ClPn2u4N52HiPWuRLc9Xf2Hj1bDQn9faXKtWSD82YKOigPde85EqNL2zAlo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734098017; c=relaxed/simple; bh=RLrPP1UOgG1fZPu3wenA1ItNRecGsfpipjwJK5Rn8So=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZtDCqE1YNaYKVxAMYC5orGnfbot/1YocrE+73e05qOtMjUxl2y4vl74bi1z9MsZcZuUN1lHipEwcHZ0os9xA7AI5dWi/oa7vonBzCzgqXo5sK0NsLF2q4/6RwXcmRbrgJRWZtUCf6nRaQq3WkVZihIpiAphel4PHyGxf+6Z1eNA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XXNAEqTQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XXNAEqTQ" Received: by smtp.kernel.org (Postfix) with ESMTPS id B11A3C4AF0B; Fri, 13 Dec 2024 13:53:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734098016; bh=RLrPP1UOgG1fZPu3wenA1ItNRecGsfpipjwJK5Rn8So=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=XXNAEqTQ92uJ4veGQ6SqqDIhvdN2aBWbk8/iULZqM5iMgy5XWi7+b5/wBH/WYs8q4 NQlikAdOn22ZzZMVYfOxRnIiuHkvVB+VJrMky65yRv2lLRagDNE/KDSGXsjuH8NdyH 3jndUqkUS/HUA1RJTS1nu8nRUBC9Vhdr5Z8Tmtrc6HyR9S9++kWWAW229pTTbNE3ur 9G6CitFRMEyKTpVI/OwOh+zBgVW44UypXhbrqiIUO1GKqDMD0RL0JkdOlmdzU+Rs0U VH7ZV1yXVU8TBbdPpIedLc3+qmhiJlLi+i0K2Nq3H1X+GL/aQgmgf6X7mrQrnmJpyf btHzdqpoLSzMg== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 937C8E7717D; Fri, 13 Dec 2024 13:53:36 +0000 (UTC) From: Manivannan Sadhasivam via B4 Relay Date: Fri, 13 Dec 2024 19:23:31 +0530 Subject: [PATCH v2 3/3] scsi: ufs: qcom: Power down the controller/device during system suspend for SM8550/SM8650 SoCs Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241213-ufs-qcom-suspend-fix-v2-3-1de6cd2d6146@linaro.org> References: <20241213-ufs-qcom-suspend-fix-v2-0-1de6cd2d6146@linaro.org> In-Reply-To: <20241213-ufs-qcom-suspend-fix-v2-0-1de6cd2d6146@linaro.org> To: Alim Akhtar , Avri Altman , Bart Van Assche , "James E.J. Bottomley" , "Martin K. Petersen" , Abel Vesa , Bjorn Andersson , Neil Armstrong , Konrad Dybcio Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Amit Pundir , Nitin Rawat , Manivannan Sadhasivam , stable@vger.kernel.org X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=3153; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=dm+C1IineBDRJt5UyRNTw/yDrjuto+TzGCEuC82e76E=; b=owGbwMvMwMUYOl/w2b+J574ynlZLYkiPsYk5XdcQFOSdlJb88sca9c9lF9+/U52kUZDiuavBQ jI1S0Ctk9GYhYGRi0FWTJElfamzVqPH6RtLItSnwwxiZQKZwsDFKQATWSPP/s9a+p95776Zt1rF kqQX+kyw0jFp1D954eYuWx4+VgHViTseKmY/c3hR9+i3dN3ZNo1eLo6T/3bVBn5mTJRg0v214/E 27+0zQrnfG5j5h8+QDy8q7dKqc/TOqV7NKebmLVkvuuID/5ED3NOn/N3W32zgFLHK5V69vNUUCf 2VxbV26VJO0kcYZJ7yqGQY6HKWsMTO3pGfujD72vRv9VXdl1udnH6/W6AavC5Z1ox7gckzt9XuM plhFiprrGYHWWxNqZl2a/arq1bfdbp+T6t+lmls+rKH1zEppLl0tW/n4Vs/d9aIhK/98nea6O41 trNsMlz3N4Qr/3z7O4Vtj1iP2aZ37poTr2Q9Fkz14nsIAA== X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 X-Endpoint-Received: by B4 Relay for manivannan.sadhasivam@linaro.org/default with auth_id=185 X-Original-From: Manivannan Sadhasivam Reply-To: manivannan.sadhasivam@linaro.org From: Manivannan Sadhasivam SM8550 and SM8650 SoCs doesn't support UFS PHY retention. So once these SoCs reaches the low power state (CX power collapse) during system suspend, all the PHY hardware state gets lost. This leads to the UFS resume failure: ufshcd-qcom 1d84000.ufs: ufshcd_uic_hibern8_exit: hibern8 exit failed. ret = 5 ufshcd-qcom 1d84000.ufs: __ufshcd_wl_resume: hibern8 exit failed 5 ufs_device_wlun 0:0:0:49488: ufshcd_wl_resume failed: 5 ufs_device_wlun 0:0:0:49488: PM: dpm_run_callback(): scsi_bus_resume+0x0/0x84 returns 5 ufs_device_wlun 0:0:0:49488: PM: failed to resume async: error 5 With the default system suspend level of UFS_PM_LVL_3, the power domain for UFS PHY needs to be kept always ON to retain the state. But this would prevent these SoCs from reaching the CX power collapse state, leading to poor power saving during system suspend. So to fix this issue without affecting the power saving, set 'ufs_qcom_drvdata::no_phy_retention' to true which sets 'hba->spm_lvl' to UFS_PM_LVL_5 to allow both the controller and device (in turn the PHY) to be powered down during system suspend for these SoCs by default. Cc: stable@vger.kernel.org # 6.3 Fixes: 35cf1aaab169 ("arm64: dts: qcom: sm8550: Add UFS host controller and phy nodes") Fixes: 10e024671295 ("arm64: dts: qcom: sm8650: add interconnect dependent device nodes") Reported-by: Neil Armstrong Tested-by: Amit Pundir # on SM8550-HDK Reviewed-by: Bart Van Assche Signed-off-by: Manivannan Sadhasivam --- drivers/ufs/host/ufs-qcom.c | 5 +++++ drivers/ufs/host/ufs-qcom.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 35ae8c8fc301..edf62430cabe 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1069,6 +1069,7 @@ static int ufs_qcom_init(struct ufs_hba *hba) struct device *dev = hba->dev; struct ufs_qcom_host *host; struct ufs_clk_info *clki; + const struct ufs_qcom_drvdata *drvdata = of_device_get_match_data(hba->dev); host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); if (!host) @@ -1148,6 +1149,9 @@ static int ufs_qcom_init(struct ufs_hba *hba) dev_warn(dev, "%s: failed to configure the testbus %d\n", __func__, err); + if (drvdata && drvdata->no_phy_retention) + hba->spm_lvl = UFS_PM_LVL_5; + return 0; out_variant_clear: @@ -1866,6 +1870,7 @@ static void ufs_qcom_remove(struct platform_device *pdev) static const struct ufs_qcom_drvdata ufs_qcom_sm8550_drvdata = { .quirks = UFSHCD_QUIRK_BROKEN_LSDBS_CAP, + .no_phy_retention = true, }; static const struct of_device_id ufs_qcom_of_match[] __maybe_unused = { diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 15f6dad8b27f..919f53682beb 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -219,6 +219,7 @@ struct ufs_qcom_host { struct ufs_qcom_drvdata { enum ufshcd_quirks quirks; + bool no_phy_retention; }; static inline u32