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[46.170.50.90]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4abf5b286a0sm53158235e9.4.2026.10.30.07.28.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2026 07:28:07 -0700 (PDT) X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v12 0/6] Add Amlogic stateless H.264 video decoder for S4 From: =?utf-8?q?Wojciech_Biega=C5=84ski?= To: Zhentao Guo Cc: Nicolas Dufresne , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, Krzysztof Kozlowski In-Reply-To: <20261022-b4-s4-vdec-upstream-v12-0-616240978792@amlogic.com> References: <20261022-b4-s4-vdec-upstream-v12-0-616240978792@amlogic.com> Date: Fri, 30 Oct 2026 15:24:06 +0100 Message-Id: <179337024629.131241.9227206619077693683.b4-reply@b4> X-Mailer: b4 0.15.2 Hi, I tested v12 series on AQ222 board with v7.2-rc1. Firmware version: 'v0.4.ff.I0c83495.75444b3' build 'Thu Apr 16 18:18:55 2026'. RAW NV12 frames at the decoder output were visually OK across typical resolutions and H.264 profiles (main, high, baseline) with and without B-frames in the stream, also with I-frames only streams. I used Gstreamer's (ver. 1.26) 'v4l2slh264dec' element on Trixie with both mmap and DMA-bufs buffering (on the capture queue only). Input bitstreams where FFmpeg-generated (testsrc2 + libx264) or publicly available test videos. Decoder (and the output) remained stable with simulated (non key) frame drop at max resolution (1920x1088, noise generated by FFmpeg's bitstream filter). The performance at max resolution, tested with 'filesrc ! parsebin ! v4l2slh264dec ! fakevideosink' pipeline was ~85 fps (fixed number of outputted frames divided by the total execution time). Tested-by: Wojciech Biegański