From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f73.google.com (mail-io1-f73.google.com [209.85.166.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 18208322759 for ; Mon, 18 Aug 2025 14:29:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755527348; cv=none; b=KuMZQ+Gyx8RGoA8421xOZQkFZU4H6rC2/F5lsKkAV6VC1XFFdQHD/zjULOpTin7nTvvrUyNg1W4oF/wCjRjGaSimyCEw9c2y6JzBrePYdEgN6MQUEMyhy0EPqTZNmsqKrdiQLBQ37+q2zn6bBoYwfekb3vYJiA8Ug+SKmVWcqSM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755527348; c=relaxed/simple; bh=Atcf/onrjtwlUDJDKbgX+nxH8WoEO/HoYTnRVc1sXTk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=QCo7pxo5eV5VEHJpJLHlfl1sMCMFY6fyt3th7qMBeFbfDp8zSKJSo46EYOUSLojUQ2c6AecyLTLGiB1MmcbG8BPfUdaS5m0gl6/REoQIEaJe+MdqTLob6IZDkp+VPcxug16J/2FaXdb9Tcu3HTO5RKPYPMbqVpqt+YZjW76GCaY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jdenose.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=3Ct0a0Gt; arc=none smtp.client-ip=209.85.166.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--jdenose.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="3Ct0a0Gt" Received: by mail-io1-f73.google.com with SMTP id ca18e2360f4ac-88432e1ea71so1203977839f.2 for ; Mon, 18 Aug 2025 07:29:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1755527346; x=1756132146; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=q1k1mjvOHwuify9LTlOteZLmh387iXArNoe6DszPTuA=; b=3Ct0a0GtXUmplU5qI0Q8BVm/wBsDt2ZGxAPGxK0wRomjXvqDHSKxAlWMtNSJZLX+Oy 5fSGc4ctmtpVJEzmAb+Jitdk/PnY0wOMm2vGlh45cePIFqtawEO06OlUJt8bJpJRdn7b THO62ceIv5nIo6CwMS8L8D14lJwpmd/BeukBu9kxtv5SAEBb8Ty4cZuVDszVdYUhAjMS 8ufY/OShbuP4ySi/9E5ZrDCNRgwWcmYGYtBgbbkQitc+d0tIoH2fMwFgoLdOk7CmOmbx vvulinrMHFJzs0rRJzK+Leyh+CnhVnEN1e1eD3OmQvFnMFBMddLpTLymgy39m2+tDNaj Fgsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755527346; x=1756132146; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=q1k1mjvOHwuify9LTlOteZLmh387iXArNoe6DszPTuA=; b=o/BjYznAA/Bywmk99n0y/ufP96P3e9RZF9Pg9Eaj86KzHKd+aNVzN5TvMjwoPphE50 gdcJgXYCbVZt8JtXI64F11pJBPeDqjiAzTVjE6uUsSPWt42ti7J6bSD7fb3VcJfJm1gT wpXcHfLTqQIIwxiHJeZ7XCMKlF79aSDkDRt7/+DZxCuDEXC91C5qXr2D/OYj3TpNHNuD irtKu1vomxaKHxjfuewEkxusSM5YjB0oXe3mSBNPQOLc74YPbrz5lAxqXCykXBgLorPP JrPof5GXTqsM1J7iw8XrjAZmPGfCU+HHascFaaqXNv9URr6AQNPLT90NOwZPkokXkiJX OPhw== X-Gm-Message-State: AOJu0Yzmo+qwdpUNehqmHkL6vgONmMcqmkdfB+RGKIkOOUAl3HWwppQW x2p70i7begNe2a34O0iRRi3xsKXdmkYf34ebjDewMKl61fyYMbl3tNYpc2+4tCUh5O3rPsRxb82 VI4zq2kw+pQ== X-Google-Smtp-Source: AGHT+IHskcxyJpFYjk5Ryp9JEoiKYpePKMrSar2kRX1rGmIsjtIdsVkijDGJ4H7+mfWpdUH3OI2LF6xfPnW8 X-Received: from iobce3.prod.google.com ([2002:a05:6602:42c3:b0:881:9efa:4bc8]) (user=jdenose job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6602:2cd3:b0:876:7555:9cb4 with SMTP id ca18e2360f4ac-884470f7150mr1505137639f.1.1755527346152; Mon, 18 Aug 2025 07:29:06 -0700 (PDT) Date: Mon, 18 Aug 2025 14:28:07 +0000 In-Reply-To: <20250818-support-forcepads-v2-0-ca2546e319d5@google.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250818-support-forcepads-v2-0-ca2546e319d5@google.com> X-Mailer: b4 0.14.2 Message-ID: <20250818-support-forcepads-v2-7-ca2546e319d5@google.com> Subject: [PATCH v2 07/11] HID: input: calculate resolution for pressure From: Jonathan Denose To: Jiri Kosina , Benjamin Tissoires , Dmitry Torokhov , Jonathan Corbet , Henrik Rydberg Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Angela Czubak , "Sean O'Brien" , Jonathan Denose Content-Type: text/plain; charset="utf-8" From: Angela Czubak Assume that if the pressure is given in newtons it should be normalized to grams. If the pressure has no unit do not calculate resolution. Signed-off-by: Angela Czubak Co-developed-by: Jonathan Denose Signed-off-by: Jonathan Denose --- drivers/hid/hid-input.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index d42c1fbd20a1cc01c04f93cf10f1d1c18043929c..1d59787bd0c0e251698e2a2944dae1c4a96adefe 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -303,6 +303,19 @@ __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) } break; + case ABS_PRESSURE: + case ABS_MT_PRESSURE: + if (field->unit == HID_UNIT_NEWTON) { + /* Convert to grams, 1 newton is 101.97 grams */ + prev = physical_extents; + physical_extents *= 10197; + if (physical_extents < prev) + return 0; + unit_exponent -= 2; + } else if (field->unit != HID_UNIT_GRAM) { + return 0; + } + break; default: return 0; } -- 2.51.0.rc1.163.g2494970778-goog