From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 1EEAF219307; Thu, 19 Jun 2025 21:26:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750368414; cv=none; b=t3D1z3eQNnGZebCIKQSYNzCt5nRLMEAJikG3gpS4ejjSqIvDJiioJGt/En7736IyMCTT3/RVAzEMKZcCxBpBWpKOqaDuAAWz1BYarIXCtebueRHrUHG5bs50BJNn/Rd/SKi+sT7gW6YTv4nvZwwtq085T5CPn424MX4Q8qOYEdU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750368414; c=relaxed/simple; bh=zbKNU3MnTqIIMJM0WeV4xeoGOv33tL5vDWWxQxv6Xrw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Covr0iMairfQqwwk6Z4uwtVlMnhfqAi3ahmpOmxIIqIgDIdzgV4EYiubB5uGH3VAUS3Y/2yqVIO2Dvb4rqUC4PR3EXYS9ixZFhBpKFoJuCVyW5WeKGMuMemPW4R/h6s3JfAaOkHMAYsuHhucIzFoeOBRuHMRMK+D5Kj6c8t3v3I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=SpKgtHkZ; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="SpKgtHkZ" Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 0FF5A2EC; Thu, 19 Jun 2025 23:26:34 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1750368394; bh=zbKNU3MnTqIIMJM0WeV4xeoGOv33tL5vDWWxQxv6Xrw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SpKgtHkZy3ujToJ8EsIEb0V4pdBrudwpbObTqpuiy56fbgva0Opcc6YsfJ4kBUpxg CWgd+kd/8mRbzZ/JEUAhtJZeLJ0dDqHz4I6XCS5JZZdLNM2g0c3IJeamuJVb3Y7VmX +xZUJGQmASsZULigUw8pHIetQBEFdRkK2/0Lo3zo= Date: Fri, 20 Jun 2025 00:26:30 +0300 From: Laurent Pinchart To: Mehdi Djait Cc: sakari.ailus@linux.intel.com, akinobu.mita@gmail.com, stanislaw.gruszka@linux.intel.com, hdegoede@redhat.com, arnd@arndb.de, alain.volmat@foss.st.com, andrzej.hajda@intel.com, benjamin.mugnier@foss.st.com, dave.stevenson@raspberrypi.com, hansg@kernel.org, hverkuil@xs4all.nl, jacopo.mondi@ideasonboard.com, jonas@kwiboo.se, kieran.bingham@ideasonboard.com, khalasa@piap.pl, prabhakar.csengg@gmail.com, mani@kernel.org, m.felsch@pengutronix.de, martink@posteo.de, mattwmajewski@gmail.com, matthias.fend@emfend.at, mchehab@kernel.org, michael.riesch@collabora.com, naush@raspberrypi.com, nicholas@rothemail.net, nicolas.dufresne@collabora.com, paul.elder@ideasonboard.com, dan.scally@ideasonboard.com, pavel@kernel.org, petrcvekcz@gmail.com, rashanmu@gmail.com, ribalda@chromium.org, rmfrfs@gmail.com, zhengsq@rock-chips.com, slongerbeam@gmail.com, sylvain.petinot@foss.st.com, s.nawrocki@samsung.com, tomi.valkeinen@ideasonboard.com, umang.jain@ideasonboard.com, zhi.mao@mediatek.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: Re: [PATCH v1 00/55] media: Add a helper for obtaining the clock producer Message-ID: <20250619212630.GQ22102@pendragon.ideasonboard.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Hi Mehdi, Thank you for the patch. On Thu, Jun 19, 2025 at 07:58:53PM +0200, Mehdi Djait wrote: > Hello everyone, > > Here is my v1 for the new helper v4l2_devm_sensor_clk_get() > > Any testing of the patches is GREATLY APPRECIATED! Especially the two > drivers with the special ACPI case: > 1) OV8865 > 2) OV2680 > > > Background > ---------- > > A reference to the clock producer is not available to the kernel > in ACPI-based platforms but the sensor drivers still need them. > > devm_clk_get() will return an error and the probe function will fail. > > > Solution > -------- > > Introduce a generic helper for v4l2 sensor drivers on both DT- and ACPI-based > platforms. > > This helper behaves the same as clk_get_optional() except where there is > no clock producer like in ACPI-based platforms. > > For ACPI-based platforms the function will read the "clock-frequency" > ACPI _DSD property and register a fixed frequency clock with the frequency > indicated in the property. > > > Solution for special ACPI case > ------------------------------ > > This function also handles the special ACPI-based system case where: > > 1) The clock-frequency _DSD property is present. > 2) A reference to the clock producer is present, where the clock is provided > by a camera sensor PMIC driver (e.g. int3472/tps68470.c) > > In this case try to set the clock-frequency value to the provided clock. > > > RFC History > ----------- > > RFC v4 -> RFC v5: > Suggested by Arnd Bergmann: > - removed IS_REACHABLE(CONFIG_COMMON_CLK). IS_REACHABLE() is actually > discouraged [1]. COFIG_COMMON_CLK is a bool, so IS_ENABLED() will be the > right solution here > Suggested by Hans de Goede: > - added handling for the special ACPI-based system case, where > both a reference to the clock-provider and the _DSD > clock-frequency are present. > - updated the function's kernel-doc and the commit msg > to mention this special case. > Link RFC v4: https://lore.kernel.org/linux-media/20250321130329.342236-1-mehdi.djait@linux.intel.com/ > [1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/Documentation/kbuild/kconfig-language.rst?h=next-20250513&id=700bd25bd4f47a0f4e02e0a25dde05f1a6b16eea > > RFC v3 -> RFC v4: > Suggested by Laurent: > - removed the #ifdef to use IS_REACHABLE(CONFIG_COMMON_CLK) > - changed to kasprintf() to allocate the clk name when id is NULL and > used the __free(kfree) scope-based cleanup helper when > defining the variable to hold the allocated name > Link v3: https://lore.kernel.org/linux-media/20250321093814.18159-1-mehdi.djait@linux.intel.com/ > > RFC v2 -> RFC v3: > - Added #ifdef CONFIG_COMMON_CLK for the ACPI case > Link v2: https://lore.kernel.org/linux-media/20250310122305.209534-1-mehdi.djait@linux.intel.com/ > > RFC v1 -> RFC v2: > Suggested by Sakari: > - removed clk_name > - removed the IS_ERR() check > - improved the kernel-doc comment and commit msg > Link v1: https://lore.kernel.org/linux-media/20250227092643.113939-1-mehdi.djait@linux.intel.com > > Mehdi Djait (55): > media: v4l2-common: Add a helper for obtaining the clock producer > Documentation: media: camera-sensor: Mention > v4l2_devm_sensor_clk_get() for obtaining the clock > media: i2c: ar0521: Use the v4l2 helper for obtaining the clock > media: i2c: ds90ub913: Use the v4l2 helper for obtaining the clock > media: i2c: ds90ub960: Use the v4l2 helper for obtaining the clock Those two are FPD-Link serializer and deserializer drivers. I would leave them out, and only address camera sensors in this series, as ACPI integration for serdes or other kind of chips needs to be discussed separately. > media: i2c: et8ek8: Use the v4l2 helper for obtaining the clock > media: i2c: gc05a2: Use the v4l2 helper for obtaining the clock > media: i2c: gc08a3: Use the v4l2 helper for obtaining the clock > media: i2c: gc2145: Use the v4l2 helper for obtaining the clock > media: i2c: hi846: Use the v4l2 helper for obtaining the clock > media: i2c: imx214: Use the v4l2 helper for obtaining the clock > media: i2c: imx219: Use the v4l2 helper for obtaining the clock > media: i2c: imx283: Use the v4l2 helper for obtaining the clock > media: i2c: imx290: Use the v4l2 helper for obtaining the clock > media: i2c: imx296: Use the v4l2 helper for obtaining the clock > media: i2c: imx334: Use the v4l2 helper for obtaining the clock > media: i2c: imx335: Use the v4l2 helper for obtaining the clock > media: i2c: imx412: Use the v4l2 helper for obtaining the clock > media: i2c: imx415: Use the v4l2 helper for obtaining the clock > media: i2c: max2175: Use the v4l2 helper for obtaining the clock This is a tuner, I would leave it out too. > media: i2c: mt9m001: Use the v4l2 helper for obtaining the clock > media: i2c: mt9m111: Use the v4l2 helper for obtaining the clock > media: i2c: mt9m114: Use the v4l2 helper for obtaining the clock > media: i2c: mt9p031: Use the v4l2 helper for obtaining the clock > media: i2c: mt9t112: Use the v4l2 helper for obtaining the clock > media: i2c: mt9v032: Use the v4l2 helper for obtaining the clock > media: i2c: mt9v111: Use the v4l2 helper for obtaining the clock > media: i2c: ov02a10: Use the v4l2 helper for obtaining the clock > media: i2c: ov2659: Use the v4l2 helper for obtaining the clock > media: i2c: ov2685: Use the v4l2 helper for obtaining the clock > media: i2c: ov5640: Use the v4l2 helper for obtaining the clock > media: i2c: ov5645: Use the v4l2 helper for obtaining the clock > media: i2c: ov5647: Use the v4l2 helper for obtaining the clock > media: i2c: ov5648: Use the v4l2 helper for obtaining the clock > media: i2c: ov5695: Use the v4l2 helper for obtaining the clock > media: i2c: ov64a40: Use the v4l2 helper for obtaining the clock > media: i2c: ov6650: Use the v4l2 helper for obtaining the clock > media: i2c: ov7740: Use the v4l2 helper for obtaining the clock > media: i2c: ov8856: Use the v4l2 helper for obtaining the clock > media: i2c: ov8858: Use the v4l2 helper for obtaining the clock > media: i2c: ov8865: Use the v4l2 helper for obtaining the clock > media: i2c: ov9282: Use the v4l2 helper for obtaining the clock > media: i2c: ov9640: Use the v4l2 helper for obtaining the clock > media: i2c: ov9650: Use the v4l2 helper for obtaining the clock > media: i2c: s5c73m3: Use the v4l2 helper for obtaining the clock > media: i2c: s5k5baf: Use the v4l2 helper for obtaining the clock > media: i2c: s5k6a3: Use the v4l2 helper for obtaining the clock > media: i2c: st-mipid02: Use the v4l2 helper for obtaining the clock > media: i2c: tc358743: Use the v4l2 helper for obtaining the clock > media: i2c: tc358746: Use the v4l2 helper for obtaining the clock Those three drivers are for a CSI-2 to parallel or HDMI to CSI-2 bridges, I would leave them out too. > media: i2c: thp7312: Use the v4l2 helper for obtaining the clock And this is an external ISP, that I would also leave out for now. > media: i2c: vd55g1: Use the v4l2 helper for obtaining the clock > media: i2c: vd56g3: Use the v4l2 helper for obtaining the clock > media: i2c: vgxy61: Use the v4l2 helper for obtaining the clock > media: i2c: ov2680: Use the v4l2 helper for obtaining the clock All the rest should be sensors, but please double-check. For the sensor driver patches *except* ov8865 and ov2680, Reviewed-by: Laurent Pinchart > > .../driver-api/media/camera-sensor.rst | 3 +- > drivers/media/i2c/ar0521.c | 2 +- > drivers/media/i2c/ds90ub913.c | 2 +- > drivers/media/i2c/ds90ub960.c | 2 +- > drivers/media/i2c/et8ek8/et8ek8_driver.c | 2 +- > drivers/media/i2c/gc05a2.c | 2 +- > drivers/media/i2c/gc08a3.c | 2 +- > drivers/media/i2c/gc2145.c | 2 +- > drivers/media/i2c/hi846.c | 2 +- > drivers/media/i2c/imx214.c | 2 +- > drivers/media/i2c/imx219.c | 2 +- > drivers/media/i2c/imx283.c | 2 +- > drivers/media/i2c/imx290.c | 2 +- > drivers/media/i2c/imx296.c | 2 +- > drivers/media/i2c/imx334.c | 2 +- > drivers/media/i2c/imx335.c | 2 +- > drivers/media/i2c/imx412.c | 2 +- > drivers/media/i2c/imx415.c | 2 +- > drivers/media/i2c/max2175.c | 2 +- > drivers/media/i2c/mt9m001.c | 2 +- > drivers/media/i2c/mt9m111.c | 2 +- > drivers/media/i2c/mt9m114.c | 2 +- > drivers/media/i2c/mt9p031.c | 2 +- > drivers/media/i2c/mt9t112.c | 2 +- > drivers/media/i2c/mt9v032.c | 2 +- > drivers/media/i2c/mt9v111.c | 2 +- > drivers/media/i2c/ov02a10.c | 2 +- > drivers/media/i2c/ov2659.c | 2 +- > drivers/media/i2c/ov2680.c | 27 +++------- > drivers/media/i2c/ov2685.c | 2 +- > drivers/media/i2c/ov5640.c | 2 +- > drivers/media/i2c/ov5645.c | 2 +- > drivers/media/i2c/ov5647.c | 2 +- > drivers/media/i2c/ov5648.c | 2 +- > drivers/media/i2c/ov5695.c | 2 +- > drivers/media/i2c/ov64a40.c | 2 +- > drivers/media/i2c/ov6650.c | 2 +- > drivers/media/i2c/ov7740.c | 2 +- > drivers/media/i2c/ov8856.c | 2 +- > drivers/media/i2c/ov8858.c | 2 +- > drivers/media/i2c/ov8865.c | 32 ++---------- > drivers/media/i2c/ov9282.c | 2 +- > drivers/media/i2c/ov9640.c | 2 +- > drivers/media/i2c/ov9650.c | 2 +- > drivers/media/i2c/s5c73m3/s5c73m3-core.c | 2 +- > drivers/media/i2c/s5k5baf.c | 2 +- > drivers/media/i2c/s5k6a3.c | 2 +- > drivers/media/i2c/st-mipid02.c | 2 +- > drivers/media/i2c/tc358743.c | 2 +- > drivers/media/i2c/tc358746.c | 2 +- > drivers/media/i2c/thp7312.c | 2 +- > drivers/media/i2c/vd55g1.c | 2 +- > drivers/media/i2c/vd56g3.c | 2 +- > drivers/media/i2c/vgxy61.c | 2 +- > drivers/media/v4l2-core/v4l2-common.c | 49 +++++++++++++++++++ > include/media/v4l2-common.h | 25 ++++++++++ > 56 files changed, 136 insertions(+), 102 deletions(-) -- Regards, Laurent Pinchart