From patchwork Sat Nov 18 16:16:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Young X-Patchwork-Id: 745095 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b="PLFePGTJ"; dkim=pass (2048-bit key) header.d=mess.org header.i=@mess.org header.b="oTGl5NKh" Received: from gofer.mess.org (gofer.mess.org [IPv6:2a02:8011:d000:212::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C10EEC0; Sat, 18 Nov 2023 08:16:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1700324201; bh=TbyBy9m0d9jULVS5yI832xaLc5u65iiOEGuBD5bHlNM=; h=From:To:Cc:Subject:Date:From; b=PLFePGTJYUfJsnZa+spu2rw/J58n3tZehqbv/bRSUnZ/DuNP+RpbYJnaGp7/NJMQL PyZ1qUnOgjFJ+hMABRcvsMdTr8UfZ73e/baUANGklXC47K38OR7kQbTWaVoWuPNTl8 pX0gt4PfqBqOmmfPInwuONOv3YDvaOh0Nj8bxwMpaRfeIrP09MDOMC3vaYP5XJfBxV t3ymV/HkuJ2RGz0y9KrhmgUMP7cyLAmTylNyrEUDUhDJDQ26qs5sJ3kz3EuVaGp0qB 1sUmRsRS+3KCGaHOVoqKUcRZauxKG2pAdfo/OECDJIJNvV8ASAkZnkGfeLkQruhI+T 0GHMisimL0p/Q== Received: by gofer.mess.org (Postfix, from userid 501) id 1FE49100105; Sat, 18 Nov 2023 16:16:41 +0000 (GMT) X-Spam-Level: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mess.org; s=2020; t=1700324198; bh=TbyBy9m0d9jULVS5yI832xaLc5u65iiOEGuBD5bHlNM=; h=From:To:Cc:Subject:Date:From; b=oTGl5NKhXMTt0l+U7k+FprBUobCPuuWoIrSune/IBrfmLyF8X6c/6KgV7bPj8nZJU wKMt/Ral2Mc4LbFzPcjjBhNEIrjQ4pkZaqES6+cl9gtHYV/qSl+5I5XNMECt9B3G8x fT5+kopb22VCIU6CGH2zBrlvRHNgmU3RyX8r1Te6Sb19QEJW7zn5jlAMvVH0THgwQG t7kA94YYE8RcyyAfaJo6Qaq6hhUSpnn9nkO7i5Nol/TuQS57Qopm8bErazhWBbWV4C hCDMi5rgSjRy4a+L4W9b1P+BVEqVoh6ZQAkvUt9MamFRGFrq8xn4HHuqJBGdCNqIzk 6foPC8AsmllEw== Received: from bigcore.mess.org (bigcore-239.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 E781E100064; Sat, 18 Nov 2023 16:16:38 +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 v5 0/4] Improve pwm-ir-tx precision Date: Sat, 18 Nov 2023 16:16:16 +0000 Message-ID: X-Mailer: git-send-email 2.42.1 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: 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_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 | 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 +++++++++---- 23 files changed, 248 insertions(+), 92 deletions(-)