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[90.63.244.31]) by smtp.gmail.com with ESMTPSA id z9sm15023246wma.39.2019.05.13.04.28.44 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 13 May 2019 04:28:44 -0700 (PDT) Message-ID: <10e588ae1e259c2c2bc9cfd0e788aa41735f0f66.camel@baylibre.com> Subject: Re: [PATCH 0/3] mmc: meson-gx: add ddr-access-quirk support From: Jerome Brunet To: Neil Armstrong , ulf.hansson@linaro.org, khilman@baylibre.com Date: Mon, 13 May 2019 13:28:43 +0200 In-Reply-To: <24b8cd2eb2879378ca0cac6ddfd9c5cae68699bc.camel@baylibre.com> References: <20190513091548.16674-1-narmstrong@baylibre.com> <24b8cd2eb2879378ca0cac6ddfd9c5cae68699bc.camel@baylibre.com> User-Agent: Evolution 3.30.5 (3.30.5-1.fc29) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190513_042847_422685_E7313034 X-CRM114-Status: UNSURE ( 9.24 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: baylibre-upstreaming@groups.io, linux-amlogic@lists.infradead.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On Mon, 2019-05-13 at 11:58 +0200, Jerome Brunet wrote: > > The performance hit hasn't been evaluated, but the fix has been tested > > using a WiFi AP6398S SDIO module, and the iperf3 Bandwidth measurement gave > > 55.2 Mbits/sec over a 63 Hours long test, with the SDIO ios set as High-Speed > > at 50MHz clock. It gave around 170 Mbits/sec as SDR104 and 200MHz clock. > > These numbers looks to be limited by the MMC bandwidth of the related modes. > So, if the SRAM quirk introduce a penalty for the controller, it does not appear > to be a limiting factor, AFAICT. Got confused. This comment is completely wrong, please ignore _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic