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[84.72.105.84]) by smtp.gmail.com with ESMTPSA id fc7-20020a05600c524700b003a3442f1229sm56512538wmb.29.2023.01.04.03.30.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Jan 2023 03:30:11 -0800 (PST) From: Nicolas Frattaroli To: Jagan Teki Cc: Simon Glass , Philipp Tomsich , Kever Yang , u-boot@lists.denx.de Subject: Re: [PATCH] rockchip: rk3328: Set VOP QoS to high priority Date: Wed, 04 Jan 2023 12:30:10 +0100 Message-ID: <7408445.TZXBHSJsY6@archbook> In-Reply-To: References: <20220723112836.88814-1-frattaroli.nicolas@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.6 at phobos.denx.de X-Virus-Status: Clean On Mittwoch, 4. Januar 2023 12:21:35 CET Jagan Teki wrote: > On Sat, Jul 23, 2022 at 10:31 PM Nicolas Frattaroli > wrote: > > > > The default priority for the quality of service for the video > > output results in unsightly glitches on the output whenever there > > is memory pressure on the system, which happens a lot. > > > > This sets the VOP QoS to high priority, which fixes this issue. > > Can you point out how it reproduces? > > Jagan. > To reproduce, run something like glmark2-es2-drm while also running stress --vm 4, you should see glitchy output on the HDMI on rk3328. A more real-world test is to just run a desktop environment, you will see horizontal lines through the screen the moment you start typing in e.g. a terminal emulator. Cheers, Nicolas Frattaroli