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(p200300d82f099c0081732a94640ddd31.dip0.t-ipconnect.de. [2003:d8:2f09:9c00:8173:2a94:640d:dd31]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b6f0d32a2sm347689785e9.9.2025.09.03.04.54.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 03 Sep 2025 04:54:51 -0700 (PDT) Message-ID: <735f70a4-049b-4be7-9d08-97e2b326808a@redhat.com> Date: Wed, 3 Sep 2025 13:54:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/9] dma-buf: heaps: Add Tegra VPR support To: Thierry Reding , David Airlie , Simona Vetter , Sumit Semwal Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Benjamin Gaignard , Brian Starkey , John Stultz , "T.J. Mercier" , Andrew Morton , Mike Rapoport , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org References: <20250902154630.4032984-1-thierry.reding@gmail.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20250902154630.4032984-1-thierry.reding@gmail.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 05rbMtSXut2VUAvQHs-Hln2fltR3Xfg0MT3sBp_F6mk_1756900492 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: gspyho4bkhmmkgnq3ihn3mcncr7mq5xy X-Rspam-User: X-Rspamd-Queue-Id: F06C21C000B X-Rspamd-Server: rspam05 X-HE-Tag: 1756900494-588999 X-HE-Meta: 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 dBTYiHAf 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 02.09.25 17:46, Thierry Reding wrote: > From: Thierry Reding > > Hi, > Hi, > This series adds support for the video protection region (VPR) used on > Tegra SoC devices. It's a special region of memory that is protected > from accesses by the CPU and used to store DRM protected content (both > decrypted stream data as well as decoded video frames). > > Patches 1 and 2 add DT binding documentation for the VPR and add the VPR > to the list of memory-region items for display and host1x. > > Patch 3 introduces new APIs needed by the Tegra VPR implementation that > allow CMA areas to be dynamically created at runtime rather than using > the fixed, system-wide list. This is used in this driver specifically > because it can use an arbitrary number of these areas (though they are > currently limited to 4). I am pretty sure we want a system-wide list. Currently we maintain all areas in a static array limited by CONFIG_CMA_AREAS. We can adjsut that to support for more dynamically. -- Cheers David / dhildenb