From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lukasz Majewski Date: Wed, 02 Apr 2014 08:51:22 +0200 Subject: [U-Boot] [PATCHv2 00/10] mmc: code cleanup and support DDR mode In-Reply-To: <1396419451-3377-1-git-send-email-jh80.chung@samsung.com> References: <1396419451-3377-1-git-send-email-jh80.chung@samsung.com> Message-ID: <20140402085122.2109d6af@amdc2363> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Jaehoon, > If card and host are supported DDR mode, then it can be used the DDR > mode. This patch-set has dependency about beomho's patch-set. > (Based-on u-boot-samsung repository) > > http://patchwork.ozlabs.org/patch/331986/ > http://patchwork.ozlabs.org/patch/331987/ > http://patchwork.ozlabs.org/patch/331989/ > http://patchwork.ozlabs.org/patch/331988/ > > It's result for loading image. > > sdhci controller ->5260488 bytes read in 259 ms (19.4 MiB/s) > dwmmc controller without DDR mode -> 5260488 bytes read in 202 ms > (24.8 MiB/s) dwmmc controller with DDR mode -> 5260488 bytes read in > 118 ms (42.5 MiB/s) > > Download the 400M image with lthor. > sdhci controller -> 59.4sec (Avg 6.95 MB/s) > dwmmc controller without DDR mode -> 61.6sec (Avg 6.72MB/s) > dwmmc controller with DDR mode -> 60.4sec (Avg 6.85MB/s) With downloading we aren't observing time improvement for downloading the test image and flashing it, because of the time consuming crc32 calculation. After applying the patch: http://patchwork.ozlabs.org/patch/335223/ The time itself reduces significantly to less than 20 seconds. In spite of the above I've tested this patch set on Trats2, so Tested-by: Lukasz Majewski Acked-by: Lukasz Majewski -- Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group