From patchwork Thu Nov 14 05:34:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xu, Even" X-Patchwork-Id: 843642 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 06DC21F584C; Thu, 14 Nov 2024 05:34:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731562487; cv=none; b=SjT00Sq0H9+fkJX2HfdlI890mgYJUT7Qtm8lndoTg+MowiI2w890NgrUxKJInzUTeUIMKNANM+dcF/RO1Lk0dwKhpdMm0on7tv3YjrmwL2AlYpRqtmgZn/Luz2RWa4gYcn/D6Z260MJjv1j0dFLOIK4hz1j1DoYX02hPu9NVZbo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731562487; c=relaxed/simple; bh=EevvnwGzwpUUegoCXMt6TpRxYOVenG4sbJ5c9EXGPmI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=D96gE5T1RD68CBR58QiR/R/nVByg0STtZ3Zn2HUKp6n+KqyIGCZu7wGqxtpAS/iqlcrK0Rf6e+gIi52nqCSbnHBwLQkZJU+tH5PbgADgV4e4LnWIDm618KmrSGBJNnxfA/giy8wFZkVQ4Y9Xj6qdgdkIEoKsHXBa+cFqwKqBgkw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=HaEo2NEO; arc=none smtp.client-ip=192.198.163.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="HaEo2NEO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731562486; x=1763098486; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EevvnwGzwpUUegoCXMt6TpRxYOVenG4sbJ5c9EXGPmI=; b=HaEo2NEO24LUsd58cnogwA6cMCd8D2Q6/JBaVCoLYHjuta1tAjy66nTd X9qFGldLQNHSGYbsLYPUfHRsqWceMM9EvUTi9Wv5FPX135glL1DJxtIDF LO4GrHt1AbPD7s41/sk06PRi636kpBQ095eA4LaAn2V1XKnJf5rF/KY3d uraJvX5RqqHx9wewGTT6DoDApP9cg/8L5RQYvc6tUFvdAD96XWW/eCgJn MC/Pv5mVCizyhvIrx2kpBoMSmjnGXfdj+waDqtCitx1D8FFnhYi+E6SAp zSExJFCZ3XtFhERjNn/X4u34b9b8X0VsA9h5Sz+s87FFIeDC3EKI39yKP A==; X-CSE-ConnectionGUID: Dt+okxiFRyCZ5Y3sGNwSAA== X-CSE-MsgGUID: 4si/IEl/TmStmbi0IQr5ig== X-IronPort-AV: E=McAfee;i="6700,10204,11255"; a="30869048" X-IronPort-AV: E=Sophos;i="6.12,153,1728975600"; d="scan'208";a="30869048" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Nov 2024 21:34:45 -0800 X-CSE-ConnectionGUID: MZjI6M87TDGGU60h3ohPCA== X-CSE-MsgGUID: E51ks0mNRb+FPIjO+yEimg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,153,1728975600"; d="scan'208";a="92891534" Received: from shsensorbuild.sh.intel.com ([10.239.133.18]) by fmviesa004.fm.intel.com with ESMTP; 13 Nov 2024 21:34:42 -0800 From: Even Xu To: jikos@kernel.org, bentiss@kernel.org, corbet@lwn.net, bagasdotme@gmail.com, aaron.ma@canonical.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Xinpeng Sun , Even Xu , Rui Zhang , Srinivas Pandruvada Subject: [PATCH v2 07/22] HID: intel-thc-hid: intel-thc: Add THC LTR interfaces Date: Thu, 14 Nov 2024 13:34:01 +0800 Message-Id: <20241114053416.4085715-8-even.xu@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20241114053416.4085715-1-even.xu@intel.com> References: <20241114053416.4085715-1-even.xu@intel.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Xinpeng Sun THC supports LTR configuration and runtimely mode switching. There are two LTR modes: Active LTR and Low Power LTR. THC hardware layer provides APIs for LTR configuration and mode switching. Co-developed-by: Even Xu Signed-off-by: Even Xu Signed-off-by: Xinpeng Sun Tested-by: Rui Zhang Reviewed-by: Srinivas Pandruvada --- .../intel-thc-hid/intel-thc/intel-thc-dev.c | 114 ++++++++++++++++++ .../intel-thc-hid/intel-thc/intel-thc-dev.h | 3 + .../intel-thc-hid/intel-thc/intel-thc-hw.h | 21 ++++ 3 files changed, 138 insertions(+) diff --git a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.c b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.c index 06ca0e5ba7f0..f2fb07f4092d 100644 --- a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.c +++ b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.c @@ -556,6 +556,120 @@ void thc_set_pio_interrupt_support(struct thc_device *dev, bool supported) } EXPORT_SYMBOL_NS_GPL(thc_set_pio_interrupt_support, INTEL_THC); +/** + * thc_ltr_config - Configure THC Latency Tolerance Reporting(LTR) settings + * + * @dev: The pointer of THC private device context + * @active_ltr_us: active LTR value, unit is us + * @lp_ltr_us: low power LTR value, unit is us + */ +void thc_ltr_config(struct thc_device *dev, u32 active_ltr_us, u32 lp_ltr_us) +{ + u32 active_ltr_scale, lp_ltr_scale, ltr_ctrl, ltr_mask, orig, tmp; + + if (active_ltr_us >= THC_LTR_MIN_VAL_SCALE_3 && + active_ltr_us < THC_LTR_MAX_VAL_SCALE_3) { + active_ltr_scale = THC_LTR_SCALE_3; + active_ltr_us = active_ltr_us >> 5; + } else if (active_ltr_us >= THC_LTR_MIN_VAL_SCALE_4 && + active_ltr_us < THC_LTR_MAX_VAL_SCALE_4) { + active_ltr_scale = THC_LTR_SCALE_4; + active_ltr_us = active_ltr_us >> 10; + } else if (active_ltr_us >= THC_LTR_MIN_VAL_SCALE_5 && + active_ltr_us < THC_LTR_MAX_VAL_SCALE_5) { + active_ltr_scale = THC_LTR_SCALE_5; + active_ltr_us = active_ltr_us >> 15; + } else { + active_ltr_scale = THC_LTR_SCALE_2; + } + + if (lp_ltr_us >= THC_LTR_MIN_VAL_SCALE_3 && + lp_ltr_us < THC_LTR_MAX_VAL_SCALE_3) { + lp_ltr_scale = THC_LTR_SCALE_3; + lp_ltr_us = lp_ltr_us >> 5; + } else if (lp_ltr_us >= THC_LTR_MIN_VAL_SCALE_4 && + lp_ltr_us < THC_LTR_MAX_VAL_SCALE_4) { + lp_ltr_scale = THC_LTR_SCALE_4; + lp_ltr_us = lp_ltr_us >> 10; + } else if (lp_ltr_us >= THC_LTR_MIN_VAL_SCALE_5 && + lp_ltr_us < THC_LTR_MAX_VAL_SCALE_5) { + lp_ltr_scale = THC_LTR_SCALE_5; + lp_ltr_us = lp_ltr_us >> 15; + } else { + lp_ltr_scale = THC_LTR_SCALE_2; + } + + regmap_read(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, &orig); + ltr_ctrl = FIELD_PREP(THC_M_CMN_LTR_CTRL_ACT_LTR_VAL, active_ltr_us) | + FIELD_PREP(THC_M_CMN_LTR_CTRL_ACT_LTR_SCALE, active_ltr_scale) | + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_REQ | + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_EN | + FIELD_PREP(THC_M_CMN_LTR_CTRL_LP_LTR_VAL, lp_ltr_us) | + FIELD_PREP(THC_M_CMN_LTR_CTRL_LP_LTR_SCALE, lp_ltr_scale) | + THC_M_CMN_LTR_CTRL_LP_LTR_REQ; + + ltr_mask = THC_M_CMN_LTR_CTRL_ACT_LTR_VAL | + THC_M_CMN_LTR_CTRL_ACT_LTR_SCALE | + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_REQ | + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_EN | + THC_M_CMN_LTR_CTRL_LP_LTR_VAL | + THC_M_CMN_LTR_CTRL_LP_LTR_SCALE | + THC_M_CMN_LTR_CTRL_LP_LTR_REQ | + THC_M_CMN_LTR_CTRL_LP_LTR_EN; + + tmp = orig & ~ltr_mask; + tmp |= ltr_ctrl & ltr_mask; + + regmap_write(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, tmp); +} +EXPORT_SYMBOL_NS_GPL(thc_ltr_config, INTEL_THC); + +/** + * thc_change_ltr_mode - Change THC LTR mode + * + * @dev: The pointer of THC private device context + * @ltr_mode: LTR mode(active or low power) + */ +void thc_change_ltr_mode(struct thc_device *dev, u32 ltr_mode) +{ + if (ltr_mode == THC_LTR_MODE_ACTIVE) { + regmap_write_bits(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, + THC_M_CMN_LTR_CTRL_LP_LTR_EN, 0); + regmap_write_bits(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_EN, + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_EN); + return; + } + + regmap_write_bits(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_EN, 0); + regmap_write_bits(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, + THC_M_CMN_LTR_CTRL_LP_LTR_EN, + THC_M_CMN_LTR_CTRL_LP_LTR_EN); +} +EXPORT_SYMBOL_NS_GPL(thc_change_ltr_mode, INTEL_THC); + +/** + * thc_ltr_unconfig - Unconfigure THC Latency Tolerance Reporting(LTR) settings + * + * @dev: The pointer of THC private device context + */ +void thc_ltr_unconfig(struct thc_device *dev) +{ + u32 ltr_ctrl, bits_clear; + + regmap_read(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, <r_ctrl); + bits_clear = THC_M_CMN_LTR_CTRL_LP_LTR_EN | + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_EN | + THC_M_CMN_LTR_CTRL_LP_LTR_REQ | + THC_M_CMN_LTR_CTRL_ACTIVE_LTR_REQ; + + ltr_ctrl &= ~bits_clear; + + regmap_write(dev->thc_regmap, THC_M_CMN_LTR_CTRL_OFFSET, ltr_ctrl); +} +EXPORT_SYMBOL_NS_GPL(thc_ltr_unconfig, INTEL_THC); + MODULE_AUTHOR("Xinpeng Sun "); MODULE_AUTHOR("Even Xu "); diff --git a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h index f775b972b4f5..c25f2fd57c76 100644 --- a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h +++ b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h @@ -68,5 +68,8 @@ void thc_int_trigger_type_select(struct thc_device *dev, bool edge_trigger); void thc_interrupt_enable(struct thc_device *dev, bool int_enable); void thc_set_pio_interrupt_support(struct thc_device *dev, bool supported); int thc_interrupt_quiesce(const struct thc_device *dev, bool int_quiesce); +void thc_ltr_config(struct thc_device *dev, u32 active_ltr_us, u32 lp_ltr_us); +void thc_change_ltr_mode(struct thc_device *dev, u32 ltr_mode); +void thc_ltr_unconfig(struct thc_device *dev); #endif /* _INTEL_THC_DEV_H_ */ diff --git a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-hw.h b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-hw.h index d4b67b81e954..4a1153022605 100644 --- a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-hw.h +++ b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-hw.h @@ -653,6 +653,27 @@ /* Interrupt Quiesce default timeout value */ #define THC_QUIESCE_EN_TIMEOUT_US USEC_PER_SEC /* 1s */ +/* LTR definition */ +/* + * THC uses scale to calcualte final LTR value. + * Scale is geometric progression of 2^5 step, starting from 2^0. + * For example, THC_LTR_SCALE_2(2) means 2^(5 * 2) = 1024, unit is ns. + */ +#define THC_LTR_SCALE_0 0 +#define THC_LTR_SCALE_1 1 +#define THC_LTR_SCALE_2 2 +#define THC_LTR_SCALE_3 3 +#define THC_LTR_SCALE_4 4 +#define THC_LTR_SCALE_5 5 +#define THC_LTR_MODE_ACTIVE 0 +#define THC_LTR_MODE_LP 1 +#define THC_LTR_MIN_VAL_SCALE_3 BIT(10) +#define THC_LTR_MAX_VAL_SCALE_3 BIT(15) +#define THC_LTR_MIN_VAL_SCALE_4 BIT(15) +#define THC_LTR_MAX_VAL_SCALE_4 BIT(20) +#define THC_LTR_MIN_VAL_SCALE_5 BIT(20) +#define THC_LTR_MAX_VAL_SCALE_5 BIT(25) + /* * THC PIO opcode default value * @THC_PIO_OP_SPI_TIC_READ: THC opcode for SPI PIO read