From patchwork Mon Dec 9 17:00:03 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: 848617 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 0406C1D63FD; Mon, 9 Dec 2024 17:00:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733763637; cv=none; b=mJFPWkKozep0Z2AKc362qAhq+fOTjWLWyRcpxYF72hTdAApoyg062RdRBJMQFix08qpSeJWn4DEPEifvmtVA98OrCznWp95IoaqEnutkjufSJDt27ZaifXZF+M69PdPiJop2L5h94A6pW1pPDg1bnXGWbBhMtik2kq39qnmYFDI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733763637; c=relaxed/simple; bh=ngbKgp+VugAMnTJfakPKgA9/ZcuGqv29bbcGUazCC9Q=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Vmqa+EfDO1kcNbcwNfrejcqUq2s7QXm+0rVID0toNEmd35dElhvgAkO28whqfySeg2VdObwASGIujZ/Acb1CqsWmCYa5M0N8od1iTcWhoQec+Hw8mp3T8gTkDL0kqrEDCc9s8fs88le0W3pVDvCQrTRoDb+ilPRWb18yp0aUpGo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=qU/Zps7S; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="qU/Zps7S" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1733763633; bh=ngbKgp+VugAMnTJfakPKgA9/ZcuGqv29bbcGUazCC9Q=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=qU/Zps7SNpOtgGeGpoNAgZKXrr2A1vsySgTauEmXfAO/oNrtJHcj616NESzgcRoJa 2tIoLKxA1fH3IrVYjavkmGyycJm60n9J2K3Tg7hv24TmJAGdMFQQz6rGljv9wy2hBO UHwn2PqrFtewqO617PEBbaUcO6GXhMWjsIn9hbf7KKK7GSXdI+qPMzmWLf4Q8Ki7vX M/qFvqa8Z+/wTlh+o4tx43UKz8p08RovKh6K63lpYsIrX9U7++gjVoBRNzDsAgjK5T JQKJ/NAChkfZ7P+yeyiet4HncgSSyVcr8vXSeHKiMbHBSJp7d2vZAMFZDuZh5uvH8n uR1J/rvnL6ctw== Received: from [192.168.0.47] (unknown [IPv6:2804:14c:1a9:53ee::1001]) (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 B053417E37C6; Mon, 9 Dec 2024 18:00:28 +0100 (CET) From: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= Date: Mon, 09 Dec 2024 14:00:03 -0300 Subject: [PATCH v2 2/5] thermal/drivers/mediatek/lvts: Disable Stage 3 thermal threshold Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241209-mt8192-lvts-filtered-suspend-fix-v2-2-5b046a99baa9@collabora.com> References: <20241209-mt8192-lvts-filtered-suspend-fix-v2-0-5b046a99baa9@collabora.com> In-Reply-To: <20241209-mt8192-lvts-filtered-suspend-fix-v2-0-5b046a99baa9@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 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") Reviewed-by: AngeloGioacchino Del Regno 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 a1a438ebad33c1fff8ca9781e12ef9e278eef785..0aaa44b734ca43e6abfd97b2ca4ce34dc6f15826 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