From: Lukasz Majewski <l.majewski@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCHv2 00/10] mmc: code cleanup and support DDR mode
Date: Wed, 02 Apr 2014 08:51:22 +0200 [thread overview]
Message-ID: <20140402085122.2109d6af@amdc2363> (raw)
In-Reply-To: <1396419451-3377-1-git-send-email-jh80.chung@samsung.com>
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 <l.majewski@samsung.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
--
Best regards,
Lukasz Majewski
Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
next prev parent reply other threads:[~2014-04-02 6:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-02 6:17 [U-Boot] [PATCHv2 00/10] mmc: code cleanup and support DDR mode Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 01/10] mmc: s5p_sdhci: add the s5p_sdhci_core_init function Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 02/10] ARM: exynos: board: change the mmc/sd init sequence Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 03/10] ARM: exynos: clock: modify the set_mmc_clk for exynos4 Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 04/10] mmc: exynos_dw_mmc: restore the property into host Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 05/10] mmc: remove the unnecessary define and fix the wrong bit control Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 06/10] mmc: support the DDR mode for eMMC Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 07/10] mmc: dw_mmc: support the DDR mode Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 08/10] ARM: dts: exnyos: enable dw-mmc controller Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 09/10] mmc: exynos_dw_mmc: enable the DDR mode Jaehoon Chung
2014-04-02 6:17 ` [U-Boot] [PATCHv2 10/10] ARM: exynos4: enable the dwmmc configuration Jaehoon Chung
2014-04-02 6:51 ` Lukasz Majewski [this message]
2014-04-02 10:39 ` [U-Boot] [PATCHv2 00/10] mmc: code cleanup and support DDR mode Pantelis Antoniou
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