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[82.149.1.233]) by smtp.gmail.com with ESMTPSA id bc3-20020a056402204300b0050bc41352d9sm949023edb.46.2023.05.18.14.08.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 May 2023 14:08:02 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Maxime Ripard , David Airlie , Daniel Vetter , Chen-Yu Tsai , Samuel Holland , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Roman Beranek Cc: Frank Oltmanns , Icenowy Zheng , Ondrej Jirman , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 1/4] clk: sunxi-ng: a64: force select PLL_MIPI in TCON0 mux Date: Thu, 18 May 2023 23:07:59 +0200 Message-ID: <4828357.31r3eYUQgx@jernej-laptop> In-Reply-To: <20230505052110.67514-2-me@crly.cz> References: <20230505052110.67514-1-me@crly.cz> <20230505052110.67514-2-me@crly.cz> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230518_140807_501423_D44E928C X-CRM114-Status: GOOD ( 11.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dne petek, 05. maj 2023 ob 07:21:07 CEST je Roman Beranek napisal(a): > TCON0's source clock can be fed from either PLL_MIPI, or PLL_VIDEO0(2X), > however MIPI DSI output only seems to work when PLL_MIPI is selected and > thus the choice must be hardcoded in. > > Currently, this driver can't propagate rate change from N-K-M clocks > (such as PLL_MIPI) upwards. This prevents PLL_VIDEO0 from participating > in setting of the TCON0 data clock rate, limiting the precision with > which a target pixel clock can be matched. > > For outputs with fixed TCON0 divider, that is DSI and LVDS, the dotclock > can deviate up to 8% off target. > > Signed-off-by: Roman Beranek Applied, thanks! Best regards, Jernej _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel