From patchwork Wed Sep 14 11:58:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dorota Czaplejewicz X-Patchwork-Id: 12976060 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 2DC9AECAAD8 for ; Wed, 14 Sep 2022 11:59:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229673AbiINL7P (ORCPT ); Wed, 14 Sep 2022 07:59:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230030AbiINL7H (ORCPT ); Wed, 14 Sep 2022 07:59:07 -0400 Received: from comms.puri.sm (comms.puri.sm [159.203.221.185]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 802147D7BF; Wed, 14 Sep 2022 04:59:01 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by comms.puri.sm (Postfix) with ESMTP id 57730E0FB7; Wed, 14 Sep 2022 04:58:31 -0700 (PDT) Received: from comms.puri.sm ([127.0.0.1]) by localhost (comms.puri.sm [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id d7N0A5w4eyZy; Wed, 14 Sep 2022 04:58:30 -0700 (PDT) Date: Wed, 14 Sep 2022 13:58:08 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=puri.sm; s=comms; t=1663156710; bh=lBd6GXJ3wPOnH/QiUaG6oifUeJRoTS3Bd9+aDFujht4=; h=Date:From:To:Subject:From; b=k3aQV+q7sa6uuCqXsGWxJRNGDd92fJpaIOKgsu0g7LGup2RvsS2SkJo7jK28YhWyi APho/OdYnxPUpRuSCvze7Pwds9g++2EqGfRJkjquLpmpBwBBSMippT5LwQrJNi/xFm 34ZLLIM1EQoAdiLPfILt2zH/c8OOY46UqRxxT9PXMm5nCJ96+WLalJc2bDN6oJMZ6F 8gtjzK9mZdbukvI1rvr2MHpAe+Z04lwUxSPkWlgqedFDkCYOdw2jCqTYNUCt9Be9KW UGQzrREsWdNJJJn8I7oOaq/AQF+EHs41YdDgkXG8xC+40gGxCipN4i9unkVOK1eLdm z+lSUdi06cf7A== From: Dorota Czaplejewicz To: Steve Longerbeam , Philipp Zabel , Mauro Carvalho Chehab , Greg Kroah-Hartman , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@puri.sm, phone-devel@vger.kernel.org Subject: [PATCH 1/2] media: imx: Round line size to 4 bytes Message-ID: <20220914113436.1503790-1-dorota.czaplejewicz@puri.sm> Organization: Purism MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This has been broken in e352833d, which does not actually copy the logic from 056f9af9. Section 13.7.6.13 "CSI Image Parameter Register" of the i.MX 8M Quad Applications Processors Reference Manual states that the line size should be divisible by 8 bytes. However, the hardware also accepts sizes divisible by 4 bytes. This patch accepts line sizes divisible 4-bytes in non-planar mode. Signed-off-by: Dorota Czaplejewicz --- Hi, in recent kernels, I've noticed that the Librem 5 camera driver no longer works. The s5k3l6xx out of tree sensor driver uses sizes divisible by 4 and not by 8, for which I submitted the patch 056f9af9 . The new kernels no longer accept sizes divisible by 4. I tracked down the source: previously, the video device on the imx8m used imx_media_mbus_fmt_to_pix_fmt. e352833d introduced imx7_csi_mbus_fmt_to_pix_fmt, which is what is used now exclusively. However, imx7_csi_mbus_fmt_to_pix_fmt *does not* contain the same logic, and does not provide an explanation why the logic is different. I don't know why the "imx_*" is not used any more on the i.MX8M SoC, but I presume that "imx7_*" is the correct code path. That indicates that "imx_*" is *not* the correct code for this SoC. Under those assumptions, I added the relaxed rounding to the "imx7_*" function, to match what the SoC can do (patch 1). I also reverted my original patch (patch 2), because if "imx7_*" is the correct function for my SoC, then I had never intended to mess with whatever other SoC is handled by the "imx_" function. Cheers, Dorota drivers/staging/media/imx/imx7-media-csi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c index 643547bfa90f..bafbb5ef08d5 100644 --- a/drivers/staging/media/imx/imx7-media-csi.c +++ b/drivers/staging/media/imx/imx7-media-csi.c @@ -1000,10 +1000,10 @@ static int imx7_csi_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix, } /* Round up width for minimum burst size */ - width = round_up(mbus->width, 8); + width = round_up(mbus->width, 4); /* Round up stride for IDMAC line start address alignment */ - stride = round_up((width * cc->bpp) >> 3, 8); + stride = round_up((width * cc->bpp) >> 3, 4); pix->width = width; pix->height = mbus->height;