From patchwork Mon Nov 25 21:20:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= X-Patchwork-Id: 13885310 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 F0909D59D72 for ; Mon, 25 Nov 2024 21:24:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wyme2OsG95g5WOxSQq/3pmrYqsEiYNKkz/Sim7a7wlU=; b=Wz9v65zQfsaC0gANFIrjcPsMlz DOIVUAWOftnkbVZ/T68K4VKzFP8qL+fXIeMaG0DrUBHNAJ6GpNl4DAjbVIDIV5Z+jkoCHeLFIKZCl zILfUhwJjlsJelCFStAWzE7xnre8IsV+woFos1boA6rSSthBl2+npVok7+hjR1UmbpA3dVjXlR89B 1s9/hkpW6ddOu6iVMTHrsusnCUd1vcoE5g7sC41Vad7Q8rYfAzaR4ysutwDszr1B3z0UNANaJGf3s n9EH5oXSKY3N2QTfBkmNF6lnEuX+RFQo42M5BjQP8CaA52SeCqNLevV/o1jpQsTDtX8BjM5HxsbrI H3OdRcmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tFgYq-000000097lV-3Gma; Mon, 25 Nov 2024 21:24:00 +0000 Received: from bali.collaboradmins.com ([148.251.105.195]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tFgVz-000000097HK-1y1i; Mon, 25 Nov 2024 21:21:06 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1732569662; bh=LpEjmVu/EA1ztaAhIRIVkX/l3QXxxRAYfr2dOcvUBzc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=n5hGKvGmJfWKh2iYreHm90D575Khh5vO457BBdvKcaph3GN/yFu2tn0VVerX5UYbg R1hx9GLlVlsOO0X2e/dLU6UFzCO4LRfA4ihQBu6HPIsz+RqfNX7bOjRpw3ZTY+u0lW zHWq2wJtXXUPxw7eZDZXoIJuLg4HlWAWyA4PB6ML71SxJKKwOUun2aNrnsQNup2D7D 7Gu71DHUfx4NvUSOcF80YTgomUFUb/N5v021NXGQs99VrkkC6FLmziERVRw6jTSJfj 1CMUyreSRVHOiDftuZmh7Gf8pC69bW3DizdoCo6eKTB4jks+6WoQDtA/nFVbi0UHRl dNkcyCnL2zzCA== Received: from [192.168.1.63] (pool-100-2-116-133.nycmny.fios.verizon.net [100.2.116.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: nfraprado) by bali.collaboradmins.com (Postfix) with ESMTPSA id D4E5217E37CE; Mon, 25 Nov 2024 22:20:59 +0100 (CET) From: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= Date: Mon, 25 Nov 2024 16:20:29 -0500 Subject: [PATCH 2/5] thermal/drivers/mediatek/lvts: Disable Stage 3 thermal threshold MIME-Version: 1.0 Message-Id: <20241125-mt8192-lvts-filtered-suspend-fix-v1-2-42e3c0528c6c@collabora.com> References: <20241125-mt8192-lvts-filtered-suspend-fix-v1-0-42e3c0528c6c@collabora.com> In-Reply-To: <20241125-mt8192-lvts-filtered-suspend-fix-v1-0-42e3c0528c6c@collabora.com> To: "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Matthias Brugger , AngeloGioacchino Del Regno , Alexandre Mergnat , Balsam CHIHI Cc: kernel@collabora.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Hsin-Te Yuan , Chen-Yu Tsai , =?utf-8?q?Bernhard_Rosenkr=C3=A4nzer?= , "Rafael J. Wysocki" , =?utf-8?b?TsOtY29sYXMg?= =?utf-8?b?Ri4gUi4gQS4gUHJhZG8=?= , stable@vger.kernel.org X-Mailer: b4 0.14.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241125_132103_650149_E9D09C4C X-CRM114-Status: GOOD ( 15.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Stage 3 thermal threshold is currently configured during the controller initialization to 105 Celsius. From the kernel perspective, this configuration is harmful because: * The stage 3 interrupt that gets triggered when the threshold is crossed is not handled in any way by the IRQ handler, it just gets cleared. Besides, the temperature used for stage 3 comes from the sensors, and the critical thermal trip points described in the Devicetree will already cause a shutdown when crossed (at a lower temperature, of 100 Celsius, for all SoCs currently using this driver). * The only effect of crossing the stage 3 threshold that has been observed is that it causes the machine to no longer be able to enter suspend. Even if that was a result of a momentary glitch in the temperature reading of a sensor (as has been observed on the MT8192-based Chromebooks). For those reasons, disable the Stage 3 thermal threshold configuration. Cc: stable@vger.kernel.org Reported-by: Hsin-Te Yuan Closes: https://lore.kernel.org/all/20241108-lvts-v1-1-eee339c6ca20@chromium.org/ Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver") Signed-off-by: Nícolas F. R. A. Prado --- drivers/thermal/mediatek/lvts_thermal.c | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-) diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c index a92ff2325c40704adc537af6995b34f93c3b0650..6ac33030f015c7239e36d81018d1a6893cb69ef8 100644 --- a/drivers/thermal/mediatek/lvts_thermal.c +++ b/drivers/thermal/mediatek/lvts_thermal.c @@ -65,7 +65,7 @@ #define LVTS_HW_FILTER 0x0 #define LVTS_TSSEL_CONF 0x13121110 #define LVTS_CALSCALE_CONF 0x300 -#define LVTS_MONINT_CONF 0x8300318C +#define LVTS_MONINT_CONF 0x0300318C #define LVTS_MONINT_OFFSET_SENSOR0 0xC #define LVTS_MONINT_OFFSET_SENSOR1 0x180 @@ -91,8 +91,6 @@ #define LVTS_MSR_READ_TIMEOUT_US 400 #define LVTS_MSR_READ_WAIT_US (LVTS_MSR_READ_TIMEOUT_US / 2) -#define LVTS_HW_TSHUT_TEMP 105000 - #define LVTS_MINIMUM_THRESHOLD 20000 static int golden_temp = LVTS_GOLDEN_TEMP_DEFAULT; @@ -145,7 +143,6 @@ struct lvts_ctrl { struct lvts_sensor sensors[LVTS_SENSOR_MAX]; const struct lvts_data *lvts_data; u32 calibration[LVTS_SENSOR_MAX]; - u32 hw_tshut_raw_temp; u8 valid_sensor_mask; int mode; void __iomem *base; @@ -837,14 +834,6 @@ static int lvts_ctrl_init(struct device *dev, struct lvts_domain *lvts_td, */ lvts_ctrl[i].mode = lvts_data->lvts_ctrl[i].mode; - /* - * The temperature to raw temperature must be done - * after initializing the calibration. - */ - lvts_ctrl[i].hw_tshut_raw_temp = - lvts_temp_to_raw(LVTS_HW_TSHUT_TEMP, - lvts_data->temp_factor); - lvts_ctrl[i].low_thresh = INT_MIN; lvts_ctrl[i].high_thresh = INT_MIN; } @@ -919,7 +908,6 @@ static int lvts_irq_init(struct lvts_ctrl *lvts_ctrl) * 10 : Selected sensor with bits 19-18 * 11 : Reserved */ - writel(BIT(16), LVTS_PROTCTL(lvts_ctrl->base)); /* * LVTS_PROTTA : Stage 1 temperature threshold @@ -932,8 +920,8 @@ static int lvts_irq_init(struct lvts_ctrl *lvts_ctrl) * * writel(0x0, LVTS_PROTTA(lvts_ctrl->base)); * writel(0x0, LVTS_PROTTB(lvts_ctrl->base)); + * writel(0x0, LVTS_PROTTC(lvts_ctrl->base)); */ - writel(lvts_ctrl->hw_tshut_raw_temp, LVTS_PROTTC(lvts_ctrl->base)); /* * LVTS_MONINT : Interrupt configuration register