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Mon, 20 Nov 2023 08:20:36 GMT Received: from [10.216.59.34] (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 20 Nov 2023 00:20:27 -0800 Message-ID: <5ecab46b-3808-4e89-a5ac-3c13e0c0a216@quicinc.com> Date: Mon, 20 Nov 2023 13:50:23 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 8/9] dt-bindings: reserved-memory: MediaTek: Add reserved memory for SVP Content-Language: en-US To: =?UTF-8?B?WW9uZyBXdSAo5ZC05YuHKQ==?= , "matthias.bgg@gmail.com" , "christian.koenig@amd.com" , "quic_vjitta@quicinc.com" , "robh+dt@kernel.org" , "sumit.semwal@linaro.org" CC: "linux-kernel@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , "jstultz@google.com" , "linaro-mm-sig@lists.linaro.org" , "linux-media@vger.kernel.org" , "devicetree@vger.kernel.org" , =?UTF-8?B?SmlhbmppYW8gWmVuZyAo5pu+5YGl5aejKQ==?= , =?UTF-8?B?S3VvaG9uZyBXYW5nICjnjovlnIvptLsp?= , "conor+dt@kernel.org" , "Brian.Starkey@arm.com" , "benjamin.gaignard@collabora.com" , "tjmercier@google.com" , "krzysztof.kozlowski+dt@linaro.org" , "dri-devel@lists.freedesktop.org" , "linux-arm-kernel@lists.infradead.org" , "angelogioacchino.delregno@collabora.com" References: <20230911023038.30649-1-yong.wu@mediatek.com> <20230911023038.30649-9-yong.wu@mediatek.com> <2c3ad77806df3ef23cb69336f2049821529e337b.camel@mediatek.com> <8666e39c6b59322af6a9637121ed22f291830c46.camel@mediatek.com> From: Jaskaran Singh In-Reply-To: <8666e39c6b59322af6a9637121ed22f291830c46.camel@mediatek.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: NFg0IuWqxZGtZ8GVXpsSQaeo7n2SJGkl X-Proofpoint-ORIG-GUID: NFg0IuWqxZGtZ8GVXpsSQaeo7n2SJGkl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-20_06,2023-11-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 clxscore=1011 mlxlogscore=999 priorityscore=1501 lowpriorityscore=0 spamscore=0 phishscore=0 adultscore=0 bulkscore=0 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311200054 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/6/2023 11:26 AM, Yong Wu (吴勇) wrote: > On Wed, 2023-11-01 at 11:20 +0530, Jaskaran Singh wrote: >> >> External email : Please do not click links or open attachments until >> you have verified the sender or the content. >> On 10/20/2023 3:20 PM, Yong Wu (吴勇) wrote: >>> On Thu, 2023-10-19 at 10:16 +0530, Vijayanand Jitta wrote: >>>> >>>> Instead of having a vendor specific binding for cma area, How >> about >>>> retrieving >>>> >>> >> https://lore.kernel.org/lkml/1594948208-4739-1-git-send-email-hayashi.kunihiko@socionext.com/ >>>> ? >>>> dma_heap_add_cma can just associate cma region and create a heap. >> So, >>>> we can reuse cma heap >>>> code for allocation instead of replicating that code here. >>>> >>> >>> Thanks for the reference. I guess we can't use it. There are two >>> reasons: >>> >>> a) The secure heap driver is a pure software driver and we have no >>> device for it, therefore we cannot call dma_heap_add_cma. >>> >> >> Hi Yong, >> >> We're considering using struct cma as the function argument to >> dma_heap_add_cma() rather than struct device. Would this help >> resolve the problem of usage with dma_heap_add_cma()? > > Yes. If we use "struct cma", I guess it works. > Great; I've posted a v2[1] for the API incorporating this change. Thanks, Jaskaran. [1] https://lore.kernel.org/lkml/20231117100337.5215-1-quic_jasksing@quicinc.com/