From patchwork Fri Oct 13 10:46:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Young X-Patchwork-Id: 733517 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 B4100CDB47E for ; Fri, 13 Oct 2023 10:47:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230014AbjJMKrb (ORCPT ); Fri, 13 Oct 2023 06:47:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229930AbjJMKra (ORCPT ); Fri, 13 Oct 2023 06:47:30 -0400 Received: from gofer.mess.org (gofer.mess.org [IPv6:2a02:8011:d000:212::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1B3283 for ; Fri, 13 Oct 2023 03:47:25 -0700 (PDT) Received: by gofer.mess.org (Postfix, from userid 501) id D15E61000FE; Fri, 13 Oct 2023 11:47:23 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1697194043; bh=hU9aji7STfIrmldMOd+WMYTSjKHBDoH+pJ3dwy4su6c=; h=From:To:Cc:Subject:Date:From; b=cuiuPH/IRwTxA2Rqz0zcvOt0ic6T9hVUnlmERvZcJZKqMu4Yd24A8cB4tYLrxUwnj NMDoIl87/EeSSoAjEOJMCE72b6s2zaugCTkOjHPG8YM24xnPFvlYchowzCEPzHisvW KSXLRaPnX8LI1ODOzox6rHy2g+1F/gIESpBcs999aHczssETU7EENNZoQ7SM3n8Qmv s1oN1QGphx+31ou9R2gOOEMCD3XLYaMR/i/ayLGVwu5DVuqOFSP822dI0TJ7fG/3iW KGh8J34KVdH1oWDugBMoISvNMwIGW43URjS6itDB6PNOFysMkLYN1PTbUDgGA7R66M xvLetUQp4l5mQ== 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 0968D10005E; Fri, 13 Oct 2023 11:47:23 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1697194043; bh=hU9aji7STfIrmldMOd+WMYTSjKHBDoH+pJ3dwy4su6c=; h=From:To:Cc:Subject:Date:From; b=cuiuPH/IRwTxA2Rqz0zcvOt0ic6T9hVUnlmERvZcJZKqMu4Yd24A8cB4tYLrxUwnj NMDoIl87/EeSSoAjEOJMCE72b6s2zaugCTkOjHPG8YM24xnPFvlYchowzCEPzHisvW KSXLRaPnX8LI1ODOzox6rHy2g+1F/gIESpBcs999aHczssETU7EENNZoQ7SM3n8Qmv s1oN1QGphx+31ou9R2gOOEMCD3XLYaMR/i/ayLGVwu5DVuqOFSP822dI0TJ7fG/3iW KGh8J34KVdH1oWDugBMoISvNMwIGW43URjS6itDB6PNOFysMkLYN1PTbUDgGA7R66M xvLetUQp4l5mQ== From: Sean Young To: linux-media@vger.kernel.org, Ivaylo Dimitrov Cc: Sean Young Subject: [PATCH v2 0/3] Improve pwm-ir-tx precision Date: Fri, 13 Oct 2023 11:46:13 +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: 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 (3): 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 drivers/media/rc/pwm-ir-tx.c | 79 +++++++++++++++++++++++++++++++++-- drivers/pwm/core.c | 62 ++++++++++++++++++++++----- drivers/pwm/pwm-bcm2835.c | 21 ++++++---- drivers/pwm/pwm-renesas-tpu.c | 1 - include/linux/pwm.h | 29 ++++++++++++- 5 files changed, 166 insertions(+), 26 deletions(-)