From patchwork Sat Sep 21 19:07:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Young X-Patchwork-Id: 830083 Received: from gofer.mess.org (gofer.mess.org [88.97.38.141]) (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 470341392; Sat, 21 Sep 2024 19:17:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=88.97.38.141 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726946256; cv=none; b=e9xVYPqAAp8G7SDGPOzWqjC1IbJI19ck3POFQAd0fu9ixUjaOWuaDqcyuJz+Eup26rUsnjJs8yICmBWWtuQIFTs/njtohsK7vxH/3UgRR3ffnAVSEM+Ol1epR2BoB5YXc4Ab4dr8+N1/G4xtuSkojWfYISZXzSVSOlFop1w4Dco= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726946256; c=relaxed/simple; bh=cgRQbwJVNpvi+0gMyBwLXOX4Nb7zmR8PfJXPOhfQyYU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=prSV9UdV+JFmeXVGyLq5rEjTLJsOP73nHxwCZwOCxRRAgB3r8t+f5tow7c0QadxcGiMB0ltbedqav8L5Z7L3jSuYveZgFjYrPVVffA/QEPCUmBfkvopWwkqZll1SZ1LBLd5gqDtSjuh6eZAMLJuiZrI66mKzecij9mW/DTTro2w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mess.org; spf=pass smtp.mailfrom=mess.org; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b=m6QnIqdS; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b=S3cCOpOT; arc=none smtp.client-ip=88.97.38.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mess.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mess.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b="m6QnIqdS"; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b="S3cCOpOT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1726945656; bh=cgRQbwJVNpvi+0gMyBwLXOX4Nb7zmR8PfJXPOhfQyYU=; h=From:To:Cc:Subject:Date:From; b=m6QnIqdSsw2JbFTBwE+R+1mrxhMOD5BfretrH/js4VDcsiactSb6lIGPDBuOUMTiX 0q/ddrLPJs5uhSopFwQpbyFLkvWFmrXD7Uk72ryVLaQAHtLcvSa765awBQnZLX6siM sxy/9YBYHfNngoI97AqNZvgVqqgQg1jL4iJ4hPjQ5dhAru5P45BWhjDtEIk7qqN5fq pIoRPjPz3R4L2DkISVBQZjbrAtxXWUjQW5sr/cG5GLoz3ujdsww8T3AeJDwGFGRveu Z3JZZqlOL3AC+/UdvYuDjdjNRJfAt+P8GlpUJzkfIsRuPh3kKCvpGdyqELEraZxeq4 wBlgbg0w4y5hg== Received: by gofer.mess.org (Postfix, from userid 501) id 6ACFB1003BE; Sat, 21 Sep 2024 20:07:36 +0100 (BST) X-Spam-Level: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1726945655; bh=cgRQbwJVNpvi+0gMyBwLXOX4Nb7zmR8PfJXPOhfQyYU=; h=From:To:Cc:Subject:Date:From; b=S3cCOpOTDPHpIl9Ly0cGT/4qAKgmxyeFY2tQEB7tYjGlJ7yky3FVNyIS17uSSLWVe tsTn+YVTV4QuDafVdjh6mti4dlLVBp9lNk5x+wbh41b+YQz74UcPk5jLO/jwz0iqr8 zKnhSmQ+KTNK/YyGiXuuAxQlXtCKmODVtFNV+VJjJ8vfVTZeooSv2r3Kvdu0rRNW7I P7cgE1KzVuc9d3YrLGzYKiYTq5eNWebFYjR2KY1BqEBvNwT9tTUiZSiDR0bD8TCwoy oDcpkFh8vgdxvTMCdQ8+YcjYq7edDQyE0Q1FNOL2MO9ppGiPebvy0p0oJqq5Wcqcx7 rhyceWyCC7JPQ== Received: from localhost.localdomain (bigcore.local [IPv6:2a02:8011:d000:212:bc3c:1b4a:a6fa:362f]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by gofer.mess.org (Postfix) with ESMTPSA id A72DB1003B9; Sat, 21 Sep 2024 20:07:35 +0100 (BST) From: Sean Young To: linux-media@vger.kernel.org, linux-rt-users@vger.kernel.org, Mauro Carvalho Chehab Cc: linux-kernel@vger.kernel.org Subject: [PATCH] media: gpio-ir-tx: Driver does not behave with PREEMPT_RT Date: Sat, 21 Sep 2024 20:07:20 +0100 Message-ID: <20240921190721.6082-1-sean@mess.org> X-Mailer: git-send-email 2.46.1 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver bit-bangs a signal with interrupts disabled. The signal can last for up to half a second (IR_MAX_DURATION). A much better way of transmitting IR is using the pwm-ir-tx driver, which does not disable interrupts. Signed-off-by: Sean Young Acked-by: Sebastian Andrzej Siewior --- drivers/media/rc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig index 74d69ce22a33e..0a8aeafdb7e07 100644 --- a/drivers/media/rc/Kconfig +++ b/drivers/media/rc/Kconfig @@ -184,6 +184,7 @@ config IR_GPIO_TX tristate "GPIO IR Bit Banging Transmitter" depends on LIRC depends on (OF && GPIOLIB) || COMPILE_TEST + depends on !PREEMPT_RT help Say Y if you want to a GPIO based IR transmitter. This is a bit banging driver.