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From: Ferass El Hafidi To: linux-amlogic@lists.infradead.org, zhentao.guo@amlogic.com, Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, Zhentao Guo Subject: Re: [PATCH RFC v2 0/3] Add Amlogic stateless H.264 video decoder for S4 References: <20251124-b4-s4-vdec-upstream-v2-0-bdbbce3f11a6@amlogic.com> In-Reply-To: <20251124-b4-s4-vdec-upstream-v2-0-bdbbce3f11a6@amlogic.com> Message-ID: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251125_030639_259261_C01FCCC1 X-CRM114-Status: UNSURE ( 7.19 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Hello, quick drive-by comments: On Mon, 24 Nov 2025 03:32, Zhentao Guo via B4 Relay wrote: >Introduce initial driver support for Amlogic's new video acceleration >hardware architecture, designed for video stream decoding. > >Compared to the current Amlogic video decoder hardware architecture, >this new implementation eliminates the Esparser hardware component, >enabling direct vb2 buffer input. The driver is designed to support >the V4L2 M2M stateless decoder API. The initial phase includes support >for H.264 decoding on Amlogic S805X2 platform. > >The driver is capable of: >- Supporting stateless H.264 decoding up to a resolution 1920x1088(on the S805X2 platform). nit: 1920x1080? >- Supporting I/P/B frame handling. >- Supporting vb2 mmap and dma-buf modes. >- Supporting frame-based decode mode. (Note that some H.264 bitstreams require > DPB reordering to generate reference lists, the stateless decoder driver > cannot access reordered reference lists in this mode, requiring the driver > to perform reference list reordering itself) >- Supporting NV12/NV21 output. >- Supporting Annex B start codes. Best regards, Ferass _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic