From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f201.google.com (mail-il1-f201.google.com [209.85.166.201]) (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 59C40272E7B for ; Mon, 4 Aug 2025 14:11:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754316689; cv=none; b=W9djjhAYV+mPZINz17xaJ63J/5ucqtj5nVzeSIC0LiYPbvyLbxceA5O1hcwOle1odsMvitet2bTBeJPSfkETJsrpEsxeHmzAnb3Lv1sRMFOJPJmoSZAKZWONRQgwFZtK8YGNXzys3bYHtvVBeTYqoNU7MTJNSAI6Wx/bmG5quhM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754316689; c=relaxed/simple; bh=LcDf0eRQa6CauF9x+0Xls3nBIKLOdfur99AWgEtgPGc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=KfChRyJ/QP0m+7JiUvIc3TK/HNAZryPh0C5/F0zfDiZHIhBp2Ht7nq9mUfoCVIeFETc0TUbJiNfSe/rP5B2TylHhbO7sWcmp3LS8fwMaH7Wn6Yo1GBUXPr71LCqEDrj0XdyIlgajb/9kWZzGZwKygM8jTMBAqMu4r/9kJ8oRkUI= 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=LTZwAZ6Q; arc=none smtp.client-ip=209.85.166.201 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="LTZwAZ6Q" Received: by mail-il1-f201.google.com with SMTP id e9e14a558f8ab-3e410d87897so32511035ab.0 for ; Mon, 04 Aug 2025 07:11:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1754316686; x=1754921486; 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=s5ue1ow6B+qjHFJbRE57LcW6Xcqfgr6lS2a71BgvhiA=; b=LTZwAZ6QzE/FBZEzcr6e2oYqNdc/y1wLFNfCqarlQCaj3vzyKuIMx8YAeKpODY4qkj 3X8WydY5yi+6HDjKbyqsHuDfwXLEXLjHRaHS1C9DZVQcVlBrivUHSZtj4EEoLUj1YXIz LPgirpiDjRQylO0TAeHabk6zYhFF/WpPZgvV/sNx2vDlunIGBy52ER/hk/qFQGjAfnMC Krxsb68qVBSB/RElLYhOf0tmeWBk6J8NK6YMkqFwIpAWxe6UhCk+g4Yob3drDn3mcfBa gNcqNrERixAnBXPrUpRyw3tN6SVupAoNk2kDzYLNHb1kpy6MFWNeL+93gAkfXZ0bDioo uZYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754316686; x=1754921486; 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=s5ue1ow6B+qjHFJbRE57LcW6Xcqfgr6lS2a71BgvhiA=; b=uYCTslvnBm7BVLCIa/v8gm0HAedLeXTr8Z9zjKzuRUZtUO8wh4ihJb8Mt3/InwAOuv bodef+Ody0oZeBM5RwEk+Jr3r3RqVPY1vsJqd0wsiiEiLHU5H/MkGUhsiVfhqtqYTq7G bUHKWS9KaId4YCGzBxyTCnFYje2TC+5/3cJDN7gyFNCoWJ1Sbuzh2Dh0kxaLefVcA3BK uEUfD5d/wK73dBp5N66ajcSJRJR9in2vz7fRLw84zdDOrbkrEJLYIQeSIAb0FAkMsREf vkKnV+dZzBY52YLvMkg8f10mKB0sJR0RUsGygBgWAd7A0CkIpHU+3npVkcFVJI3kg+FI 32nQ== X-Gm-Message-State: AOJu0YwJiYYpImPHA2aHf3bFz/+CFq/QM93qMaCjNmhAprySgmgRHEvA HlOl5gkRs0aEc3pv4LXR2kZPvboxF9fLvJszs/7uDaDY4BlT6ilTeb5iaOxMh/RnhgkCbeeUTAS QYhAD7Z+QUQ== X-Google-Smtp-Source: AGHT+IEvuLZqvj7ju8vg5N1aQ1C6x+fs98fRd9oWA6NKgtlabYP/rk9fvPfLoXJvjw/4lU+T796rg6z5WX0F X-Received: from ilbbn7.prod.google.com ([2002:a05:6e02:3387:b0:3e3:eae4:c433]) (user=jdenose job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6e02:398e:b0:3e3:d499:73f with SMTP id e9e14a558f8ab-3e4161b735cmr210331175ab.18.1754316686600; Mon, 04 Aug 2025 07:11:26 -0700 (PDT) Date: Mon, 04 Aug 2025 14:11:22 +0000 In-Reply-To: <20250804-support-forcepads-v2-0-138ca980261d@google.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250804-support-forcepads-v2-0-138ca980261d@google.com> X-Mailer: b4 0.14.2 Message-ID: <20250804-support-forcepads-v2-7-138ca980261d@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; } -- 2.50.1.565.gc32cd1483b-goog