From mboxrd@z Thu Jan 1 00:00:00 1970 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 1F625C77B7A for ; Wed, 7 Jun 2023 15:51:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241196AbjFGPvZ (ORCPT ); Wed, 7 Jun 2023 11:51:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241495AbjFGPvY (ORCPT ); Wed, 7 Jun 2023 11:51:24 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E0501988 for ; Wed, 7 Jun 2023 08:51:21 -0700 (PDT) Received: from pendragon.ideasonboard.com (om126233170111.36.openmobile.ne.jp [126.233.170.111]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 908932B6; Wed, 7 Jun 2023 17:50:52 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1686153053; bh=b4Bf++nYCvX4o6PEwn5qNO3iKus0RNDb6yuIEu7vS58=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=AQyX732KXYUtLv/yWUBCIonMO0a8w10G4gEG17qwrcHwev9gYWKEbmgSsKxDq+FEk YrgWHCHWd5t6aE1OfjcjzK7DRaSzIQ7bPn4taFG5JBvfU2A2PnASItYrWyZzWfj6LL OsKclRUprKu6tQCevlT5V6StlRSwJLxHTI7dQt4w= Date: Wed, 7 Jun 2023 18:51:15 +0300 From: Laurent Pinchart To: Hans de Goede Cc: Andy Shevchenko , Sakari Ailus , Mauro Carvalho Chehab , Andy Shevchenko , linux-media@vger.kernel.org Subject: Re: [PATCH 2/3] media: atomisp: ov2680: Convert to new CCI register access helpers Message-ID: <20230607155115.GF22127@pendragon.ideasonboard.com> References: <20230606165808.70751-1-hdegoede@redhat.com> <20230606165808.70751-3-hdegoede@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi Hans, On Wed, Jun 07, 2023 at 10:53:54AM +0200, Hans de Goede wrote: > On 6/6/23 22:53, Andy Shevchenko wrote: > > On Tue, Jun 6, 2023 at 7:58 PM Hans de Goede wrote: > >> > >> Use the new comon CCI register access helpers to replace the private > >> register access helpers in the ov2680 driver. > >> > >> While at it also switch to using the same register address defines > >> as the standard drivers/media/i2c/ov2680.c driver to make merging > >> the 2 drivers simpler. > > > > ... > > > >> + cci_write(sensor->regmap, OV2680_REG_SENSOR_CTRL_0A, sensor_ctrl_0a, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_START, sensor->mode.h_start, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_VERTICAL_START, sensor->mode.v_start, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_END, sensor->mode.h_end, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_VERTICAL_END, sensor->mode.v_end, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_OUTPUT_SIZE, > >> + sensor->mode.h_output_size, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_VERTICAL_OUTPUT_SIZE, > >> + sensor->mode.v_output_size, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_TIMING_HTS, sensor->mode.hts, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_TIMING_VTS, sensor->mode.vts, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_ISP_X_WIN, 0, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_ISP_Y_WIN, 0, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_X_INC, inc, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_Y_INC, inc, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_X_WIN, sensor->mode.h_output_size, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_Y_WIN, sensor->mode.v_output_size, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_FORMAT1, fmt1, &ret); > >> + cci_write(sensor->regmap, OV2680_REG_FORMAT2, fmt2, &ret); > > > > I know that &ret thingy was discussed before and Laurent is keen to > > have this, but has anybody actually tested how bad or not at all the > > code generation becomes? > > The cci_write function is in another module, so it won't be inlined > and as such I don't see how the code generation can become bad. We > loose all the if (ret) return ret; checks here, so the code should > become smaller. > > Or are you worried about having to pass the 1 extra parameter ? > > > ... > > > >> + struct device *dev; > >> + struct regmap *regmap; > > > > Isn't the same device associated with regmap? If so, one of them > > probably duplicates the other. > > You are right, but the entire atomisp-ov2680.c file is going away real > soon now. I plan to post a series to get drivers/media/i2c/ov2680.c > ready to replace it later today. > > So I'm not even sure if this patch should be merged, as I mentioned in > the cover letter this one is mostly here to illustrate use of the new > helpers. How about porting drivers/media/i2c/imx290.c ? That's a real-life example that can be merged, which is good to serve as an example showcasing the API usage in mainline. It will also help ensuring that these helpers are a good fit for drivers that already encode the register width in the macros. > I also wrote this patch to make porting recent atomisp-ov2680.c > changes over to drivers/media/i2c/ov2680.c easier. Part of the series > to get drivers/media/i2c/ov2680.c into shape is converting it to the > new CCI helpers so that I could then easily copy over bits from the > also converted atomisp-ov2680.c. > > So it might be interesting to still merge this so that the latest > state of atomisp-ov2680.c is easier to compare to > drivers/media/i2c/ov2680.c if the need arises. -- Regards, Laurent Pinchart