From patchwork Fri Oct 27 09:20:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Young X-Patchwork-Id: 13438416 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F892C25B72 for ; Fri, 27 Oct 2023 09:21:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345535AbjJ0JV2 (ORCPT ); Fri, 27 Oct 2023 05:21:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229503AbjJ0JV1 (ORCPT ); Fri, 27 Oct 2023 05:21:27 -0400 Received: from gofer.mess.org (gofer.mess.org [IPv6:2a02:8011:d000:212::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 198D5187; Fri, 27 Oct 2023 02:21:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1698398481; bh=MMsc7TfO6KKWgcdZUBImYN8muUXO0P+KGh9hoBHNO8w=; h=From:To:Cc:Subject:Date:From; b=BfXtVvhlXF8Kgq7ho38Sk/7tvKQ8qRthu1KMANflbSBnGrrm9S4lExvBZOrduodhf fWYNmg8yb6ExN/Fhco8riE/8ix8YJUsIeWbJuSfIKr4ftfwB30r63RNF1cVH92m//a ShXq+baA9+saGNL4LWRSxEnTRabuhYlpB9Nw1PmcxtPb53dknbJvaNyl9lqhbKG8Dm SdyfMWT/7ZLMjuv3kORc5ay+rd9+1qX0zB14GX5AQnelHLhOtW+YsEuzX6NwY0TaKR QbkfVQZTAf5/kvVHUIPXLVJ7SmMLGJl1eFu4qt2+gslORTxNnFZnzXtL6MrmzdMBQe CUdKD6CLZKnlA== Received: by gofer.mess.org (Postfix, from userid 501) id B73541000C2; Fri, 27 Oct 2023 10:21:21 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1698398480; bh=MMsc7TfO6KKWgcdZUBImYN8muUXO0P+KGh9hoBHNO8w=; h=From:To:Cc:Subject:Date:From; b=C3GyALXmyfs/HVwPl+btP/LqSOtOzxceEqg7J3oROCbhfp9t3uOLOsxCpAqz6Exn2 M3Yh+8DVi+ij9m/l0QLlWcWbS7FOZMuDbu76zN3vplLLrLcRetpETf/uIWm/zq9tlN uR0nT5HI9It5TiqgkGU5MAsdH119WISfYw+AJ6mK45sb6sInMVmcSgXY9Hrz1FetIq Vo9SGp275DBcSNyDdFOrDWf9580LFHFXREueGFwAXHNOBn+E626YShs++2klcPZYrW DNUentSNEIEV1JwFowUrI8+6aSNTY+eAVcw7MMzAcJXoQx/q3BHRGJfdaq/tNomqUX alkzzOoUTimTg== Received: from bigcore.mess.org (unknown [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 3D6611000C2; Fri, 27 Oct 2023 10:21:20 +0100 (BST) 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 v4 0/4] Improve pwm-ir-tx precision Date: Fri, 27 Oct 2023 10:20:43 +0100 Message-ID: X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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: 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_cansleep() 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 +++- .../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 | 75 +++++++++++++---- drivers/pwm/pwm-bcm2835.c | 30 ++++--- 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 | 6 +- drivers/video/fbdev/ssd1307fb.c | 2 +- include/linux/pwm.h | 57 +++++++++---- 23 files changed, 244 insertions(+), 89 deletions(-)