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 84D3F25EF87 for ; Mon, 14 Jul 2025 15:09:46 +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=1752505788; cv=none; b=HxWvIet5E7Hwi+zHjC9mXOcqEphFJp6BJMDfhqrEuKQ6M5UNh5s2bRF7ihynRDylfJH2289dqAaDnSqGuYTnu2c9e1bltmsnsOPVDClblYNwKcBVCIKrB7ileaKztky8mCTHhZ/ouPVhV034NQ3CMlhaBeXDiFSNUlHnoX3LzbA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752505788; c=relaxed/simple; bh=Wj07uc8vlmcVFwwaG+KqOnRbxIFVIENOzHLiNdvyj4k=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=TzpIJmcs1k13SYHDBxN2eCx5Va3eQ4g+Vhu8j2JGKe+t0tGctIbQYbspCwxxHmUpI+6Y8A8EYowBLff0sLsAMa3QBxwiqyEQoZ3OGPh2G247HJbe8SVWFym8BwNnY+neJeci8XoKOnfSNORXDpPlzhpjCdUWJ11oi8RqddxeuCo= 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=V7WiEdxF; 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="V7WiEdxF" Received: by mail-io1-f73.google.com with SMTP id ca18e2360f4ac-86d126265baso412730539f.0 for ; Mon, 14 Jul 2025 08:09:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1752505786; x=1753110586; 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=KXg+nnRrj6QcbCtFDjmsIexAyHPfEUdpnx9NOU2xnIA=; b=V7WiEdxFJY5wMTRv3u/3tFsMI/EPJcE6mEgQi4XcBAb2+7owQSPrcEsTOruYQcVAFS h4gtP0ax9ntDVXCx7abPq8IkwtSM9NJgOEsR/ieQ8qqlF9h4J2OTEYaMzTzvN56+T2P1 5F5PZgCoRGEiwcg+e+OQXIOcqzicvOAj9D+p6B9Qy+DdTaMLTNsm2dsMVtZMJ00eV2/M aDJAWv3aBAbtbB7jXiim2D7VGEj/EosmkTneBzXetoFGOAcku7dNbUq3RdTbcmtcpZ2U I8dw1owg6y1O+1OzQa/NyWob2NzdtC+y6cR2GZsxoaGZNJE6nsmhzQ4PJOQ88iJ10aRv +txQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752505786; x=1753110586; 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=KXg+nnRrj6QcbCtFDjmsIexAyHPfEUdpnx9NOU2xnIA=; b=hplCmgGs6ZIh5r295IvJCpPtja/xcsWWti+pI679D+AhjKhVZb8/iiBf8/y5qsNalk mea3ZbamW3TDFq1miqhjnX+5Eg96QujLmrsUcI0XgfeEVQssbWrrRx+q5W6+dRnf3Nn9 lV8SA838t7lkso2Mpo6PbsxQ+tcoqk3DxywC5rJSaaJI6oUKb09d1eEDRyL64Gxl2uM5 PVL62NjSJ2QJ2Rrazh3jXbpSCMqjn8acKzVqfMUFSqamQT73Vi3QBdb6loTIc2xyQ9ic WtPpKQ9TXpcx/lb9JdsrvEF70GF6AqsEFCSMcT9VFJPtUKnbJuYkln0Os4eZAX921jpH KWoQ== X-Forwarded-Encrypted: i=1; AJvYcCUzF1KIyIPCgVcF4VdbRorbb6YS+ecR3Rd/pfmzEKA6aMllT5ycOzWZfEpEHXB6czgfzjC+dvh5aQw=@vger.kernel.org X-Gm-Message-State: AOJu0YylNHh22UBt3Ye5NeQwZ0H4kVA/lx9Pms0ybZBFe3lF3rCw/JHP q6OqSVUSMWYppsqVi3qS4CxKZyXinr3vM6L4bMrJTTPKLDfHk4F9mj45duHovUJMoOQevfxnbzd 4suf+Fy0PfQ== X-Google-Smtp-Source: AGHT+IFP5MLxvfUExYo0yaLckU2HYF2gsyl5lWw//sDEDztcF7zqNGg73rlWEC/2cZwgZoIHQ4hytC2muViD X-Received: from iobeu8.prod.google.com ([2002:a05:6602:4c88:b0:879:8855:695d]) (user=jdenose job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6602:6417:b0:876:c5ff:24d4 with SMTP id ca18e2360f4ac-87977f78015mr1469868939f.4.1752505785679; Mon, 14 Jul 2025 08:09:45 -0700 (PDT) Date: Mon, 14 Jul 2025 15:09:40 +0000 In-Reply-To: <20250714-support-forcepads-v1-0-71c7c05748c9@google.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250714-support-forcepads-v1-0-71c7c05748c9@google.com> X-Mailer: b4 0.14.2 Message-ID: <20250714-support-forcepads-v1-7-71c7c05748c9@google.com> Subject: [PATCH 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; } -- 2.50.0.727.gbf7dc18ff4-goog