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mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=detlev.casanova@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1750343956; s=zohomail; d=collabora.com; i=detlev.casanova@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Content-Type:Message-Id:Reply-To; bh=lNxJSadVSJIRvaEmHMmUT8LLkdzhpjlPoa29IPSlJho=; b=Rw2gd+L5lImASQ1HKgHlzcgdsRLZ18+fXxNa6EGGKYSlvhX9ynLQE5rW4eASp7v8 QSbt2xeWyFdiZqGauT9ggxvclqc3XQMXBdqBBY89CArgt0gRcogHqNAXvikkSAitbSg dggkYGnqm53ErY31QUUd0D2pOjqYGY9Xq+wJk8Yg= Received: by mx.zohomail.com with SMTPS id 175034395251629.953100317805934; Thu, 19 Jun 2025 07:39:12 -0700 (PDT) From: Detlev Casanova To: 20250325213303.826925-5-detlev.casanova@collabora.com Cc: alchark@gmail.com, andrzej.p@collabora.com, cassel@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, dmitry.perchanov@intel.com, dsimic@manjaro.org, ezequiel@vanguardiasur.com.ar, gregkh@linuxfoundation.org, heiko@sntech.de, hverkuil@xs4all.nl, jacopo.mondi@ideasonboard.com, jeanmichel.hautbois@ideasonboard.com, jonas@kwiboo.se, kernel@collabora.com, kieran.bingham@ideasonboard.com, krzk+dt@kernel.org, laurent.pinchart@ideasonboard.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-staging@lists.linux.dev, Jianfeng Liu , mchehab@kernel.org, naush@raspberrypi.com, nicolas.dufresne@collabora.com, robh@kernel.org, sakari.ailus@linux.intel.com, sebastian.reichel@collabora.com, tomi.valkeinen@ideasonboard.com, umang.jain@ideasonboard.com Subject: Re: [PATCH v4 4/6] media: rockchip: Introduce the rkvdec2 driver Date: Thu, 19 Jun 2025 10:39:08 -0400 Message-ID: <5900973.DvuYhMxLoT@trenzalore> In-Reply-To: <9f098eab-7b98-4827-8538-3cab0e8d7c63@gmail.com> References: <9f098eab-7b98-4827-8538-3cab0e8d7c63@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" X-ZohoMailClient: External X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250619_073958_522599_DD4CFDC1 X-CRM114-Status: GOOD ( 15.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Jianfeng, This patch set is now a bit outdated. I will soon send a new version that you can find at [1]. That being said, you may be right. without an iommu, it would panic here (although the iommu should really be used). [1]: https://gitlab.collabora.com/detlev/linux/-/tree/add-vdpu381-and-383-to-rkvdec Regards, Detlev On Thursday, 19 June 2025 05:19:32 EDT Jianfeng Liu wrote: > Hi Detlev, > > On Tue, 25 Mar 2025 17:22:20 -0400, Detlev Casanova wrote: > >+ case RKVDEC2_ALLOC_SRAM: > >+ virt_addr = (unsigned long)ctx->rcb_bufs[i].cpu; > >+ > >+ iommu_unmap(rkvdec->iommu_domain, virt_addr, rcb_size); > > I'm testing your patch with ffmpeg patched with v4l2-request patches[1], > and I usually > > get kernel panic here. After checking rkvdec->iommu_domain before > running iommu_unmap, > > I can pass fluster ffmpeg v4l2-request test. Here is my patch based on > your commit: > > > diff --git a/drivers/media/platform/rockchip/rkvdec2/rkvdec2.c > b/drivers/media/platform/rockchip/rkvdec2/rkvdec2.c > index 75768561399..122bcdcebd4 100644 > --- a/drivers/media/platform/rockchip/rkvdec2/rkvdec2.c > +++ b/drivers/media/platform/rockchip/rkvdec2/rkvdec2.c > @@ -681,8 +681,8 @@ static void rkvdec2_free_rcb(struct rkvdec2_ctx *ctx) > switch (ctx->rcb_bufs[i].type) { > case RKVDEC2_ALLOC_SRAM: > virt_addr = (unsigned long)ctx->rcb_bufs[i].cpu; > - > - iommu_unmap(rkvdec->iommu_domain, virt_addr, > rcb_size); > + if (rkvdec->iommu_domain) > + iommu_unmap(rkvdec->iommu_domain, virt_addr, rcb_size); > gen_pool_free(ctx->dev->sram_pool, virt_addr, > rcb_size); > break; > case RKVDEC2_ALLOC_DMA: > > > [1] https://github.com/amazingfate/FFmpeg/commits/n6.1.1-new-patches/ > > > Best regards, > > Jianfeng