From patchwork Mon Dec 11 08:24:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Young X-Patchwork-Id: 752877 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b="HmYgoJPd"; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b="J1n3irC2" Received: from gofer.mess.org (gofer.mess.org [IPv6:2a02:8011:d000:212::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6BF78B6; Mon, 11 Dec 2023 00:25:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1702283108; bh=bdWuptrbipE0PwzncdIauG8w5KPE09xoJ3vuSR6axY0=; h=From:To:Cc:Subject:Date:From; b=HmYgoJPdUZR+eQiq+jXskVqSs8SEgnD5vPlaUZqRpe+CfdPEjqSRo8sQb23R6INER soc1TozRn7ZkzMtrGmYCpovEoxceVKL1R7qshgRBSaayqFKphLGyyQImJ7UhtNo9PH ZRMCg+OrfWIMrozq3o7n7uSKqvrYb4ghzkq/268lmkJaLJz0jiayXYzs76d9UcHz1V 6j6YjdqcOW6wJTSZs90UK9KG0S2+Ta3R7KYMHqkrbyISHiVuJBK1GN/Eu4R6ewt4f8 daoubCOItXA2eWHOP3kgBOp3mxde8OAjkrI+WzsJLCQ9pjqRAQHcvoJqKcyFElggKo NDeys5XofIv/Q== Received: by gofer.mess.org (Postfix, from userid 501) id C482E1009FD; Mon, 11 Dec 2023 08:25:08 +0000 (GMT) X-Spam-Level: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1702283107; bh=bdWuptrbipE0PwzncdIauG8w5KPE09xoJ3vuSR6axY0=; h=From:To:Cc:Subject:Date:From; b=J1n3irC2LDck0qzWEex4TDpUWvnmt3EQc/ykryrZkYIVrX9M51f+wp8zYGwuylz8j 1Eaj+GthDLdQ9mWgQyZHYlMyzUzK8uBa7sbD64PYvOjkEXaAsouWy6tOxaJsKIfBEr ucku53U2qfuWuXf6jTCXBOVW8JBR3aF8J0pNvrob4/KdJLlPX24RSZMKZDoX3cTHrG Qkam9XxA060D0H/HTrA7Mo5hjI8JQnqrFFoMraqjopxrAncXSA5GtRkTWYwULOO0X3 SpjPIMHnoUbfXgyC0NyhZ+Qzocaz70r0+N9KMse7uF2j6E7aVhOOajdvRs0uNbmB0f +k0qMS3a5Vfuw== Received: from localhost.localdomain (bigcore.local [IPv6:2a02:8011:d000:212:ca7f:54ff:fe51:14d6]) (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 36B7A10005E; Mon, 11 Dec 2023 08:25:07 +0000 (GMT) From: Sean Young To: linux-media@vger.kernel.org, linux-pwm@vger.kernel.org, Ivaylo Dimitrov , Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= Cc: Sean Young Subject: [PATCH v7 0/4] Improve pwm-ir-tx precision Date: Mon, 11 Dec 2023 08:24:51 +0000 Message-ID: X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The pwm-ir-tx driver has to turn the pwm signal on and off, and suffers from delays as this is done in process context. Make this work in atomic context. changes: v7: - Thierry Reding review comments - Minor cleanups - rebase v6: - Rename pwm_apply_cansleep() to pwm_apply_might_sleep() - rebase v5: - Use dev_err_probe() as Uwe suggested - rebase v4: - Split out the pwm_apply_state() rename into seperate commit - Atomic pwm function is called pwm_apply_atomic() and sleeping counterpart pwm_apply_cansleep() - Fix commit messages v3: - Renamed pwm_apply_state() to pwm_apply_cansleep() - Moved pwm atomic to struct pwm_chip - Fixed pwm docs - Other minor code review comments v2: - Simplified the pwm ir tx based on Ivaylo Dimitrov suggestions - Renamed pwm_can_sleep() to pwm_is_atomic - Fix sleeping issue in pwm-bcm2835 (clk_get_rate() can sleep) - use non_block_start() in pwm to check atomic-ness Sean Young (4): pwm: Rename pwm_apply_state() to pwm_apply_might_sleep() pwm: Make it possible to apply PWM changes in atomic context pwm: bcm2835: Allow PWM driver to be used in atomic context media: pwm-ir-tx: Trigger edges from hrtimer interrupt context Documentation/driver-api/pwm.rst | 17 +++- MAINTAINERS | 2 +- .../gpu/drm/i915/display/intel_backlight.c | 6 +- drivers/gpu/drm/solomon/ssd130x.c | 2 +- drivers/hwmon/pwm-fan.c | 8 +- drivers/input/misc/da7280.c | 4 +- drivers/input/misc/pwm-beeper.c | 4 +- drivers/input/misc/pwm-vibra.c | 8 +- drivers/leds/leds-pwm.c | 2 +- drivers/leds/rgb/leds-pwm-multicolor.c | 4 +- drivers/media/rc/pwm-ir-tx.c | 83 +++++++++++++++++-- drivers/platform/x86/lenovo-yogabook.c | 2 +- drivers/pwm/core.c | 76 +++++++++++++---- drivers/pwm/pwm-bcm2835.c | 31 ++++--- drivers/pwm/pwm-renesas-tpu.c | 1 - drivers/pwm/pwm-twl-led.c | 2 +- drivers/pwm/pwm-vt8500.c | 2 +- drivers/pwm/sysfs.c | 10 +-- drivers/regulator/pwm-regulator.c | 4 +- drivers/video/backlight/lm3630a_bl.c | 2 +- drivers/video/backlight/lp855x_bl.c | 2 +- drivers/video/backlight/pwm_bl.c | 12 +-- drivers/video/fbdev/ssd1307fb.c | 2 +- include/linux/pwm.h | 57 +++++++++---- 24 files changed, 250 insertions(+), 93 deletions(-)