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[91.76.4.184]) by smtp.googlemail.com with ESMTPSA id r11sm1823788ljc.66.2020.07.17.13.14.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Jul 2020 13:14:53 -0700 (PDT) Subject: Re: [RFC PATCH v3 16/18] gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_wait To: Sowjanya Komatineni , thierry.reding@gmail.com, jonathanh@nvidia.com, frankc@nvidia.com, hverkuil@xs4all.nl, sakari.ailus@iki.fi, robh+dt@kernel.org, helen.koike@collabora.com Cc: sboyd@kernel.org, gregkh@linuxfoundation.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org References: <1594786855-26506-1-git-send-email-skomatineni@nvidia.com> <1594786855-26506-17-git-send-email-skomatineni@nvidia.com> <20d63eca-4b2b-584e-a391-a4fb64a16b40@nvidia.com> <4690e682-8495-2327-87c7-c2f06a7a479d@nvidia.com> <66812127-38cf-2af3-51c0-50edbe446e73@nvidia.com> <9b4fbf9d-d651-aa35-c0a6-b8f16aeb0900@gmail.com> <550f1796-67ca-5856-223d-c68360243954@nvidia.com> <080b30c7-1dce-dd2f-dd96-40f6e25da4d6@gmail.com> From: Dmitry Osipenko Message-ID: Date: Fri, 17 Jul 2020 23:14:52 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 17.07.2020 18:41, Sowjanya Komatineni пишет: ... >> Also, what about the auto-calibration? Isn't it needed to be enabled for >> CSI? > STARTCAL does one time calibration and with AUTOCAL calibration will be > triggered periodically. > > For pads PULLUP/PULLDN/TERM impedance calibration, we only need one-time > calibration on pads power up. > > We always use one time pads calibration for CSI. Alright, thank you for the clarification!