On 11/23/2017 10:46 AM, Siva Durga Prasad Paladugu wrote: > Hi Jaehoon, > >> -----Original Message----- >> From: U-Boot [mailto:u-boot-boun...@lists.denx.de] On Behalf Of Jaehoon >> Chung >> Sent: Friday, October 20, 2017 5:02 PM >> To: Jean-Jacques Hiblot <jjhib...@ti.com>; tr...@konsulko.com; >> kis...@ti.com; s...@chromium.org >> Cc: u-boot@lists.denx.de >> Subject: Re: [U-Boot] [PATCH v2 00/26] mmc: Add support for HS200 and >> UHS modes >> >> Dear JJ >> >> On 09/21/2017 11:29 PM, Jean-Jacques Hiblot wrote: >>> This series brings support for HS200 and UHS modes to the mmc core. >>> It has been tested with the hsmmc driver on several platforms (DRA7, >>> AM57x, AM437x, beaglebone black, Atmel SAMA5D3 xplained). Some >>> modifications are required in the host driver to take advantage of >>> this (voltage switching, tuning). The changes to the host driver will >>> be posted a another series as this one is already long enough. >>> >>> The series starts with a small refactoring of th sd/mmc startup. The >>> first 5 commits are mostly moving code around with little or no >> functionnal change. >>> >>> Then the notion of "mode" is introduced. Until now, this information >>> wasn't kept in struct mmc. Only the clock and a flag for ddr was kept. >>> Later the mode information will be used to select the clock frequency, >>> the ddr flag and the tuning procedure. It will be also be check against the >> host capabilities. >>> >>> Then comes the big refactoring job in: >>> "mmc: refactor MMC startup to make it easier to support new modes" >> and >>> "mmc: refactor SD startup to make it easier to support new modes" >>> Since the number of modes is increasing, it makes sense to try them in >>> a more organized way. those commits use a list of supported modes and >>> iterate through them to find the best working one. It also allows to >>> switch more easilly from one mode to another (switching from HS200 to >>> DDR52 to access boot partitions for example) >>> >>> Then there are a couple of new callback added to: >>> - send the initialization stream (74 clock cycles) >>> - wait while the card is busy (used during UHS voltage switching). checking >> is >>> done on dat0. >>> - select the IO voltage >>> >>> Then Power cycle is added. Without power cycle, if a UHS card fails to >>> enumerate in UHS mode, it can't fall back to high speed mode and card >> enumeration will fail. >>> Also in case of a reset (as opposed to a power on), it ensures that >>> the SDCard is in clean state before re-doing the initialization. >>> >>> And finally the last commits add the support for HS200 and UHS. >>> >>> With this in place and the required changes in the HSMMC host driver >>> (including DMA), we observe significant improvements in the >> performances on a DRA72 evm: >>> eMMC HS200: 124 MB/s >>> eMMC DDR52: 78 MB/s >>> sd SDR104: 71 MB/s >>> sd SDR50: 44 MB/s >> >> Applied to u-boot-mmc! Thanks! >> I will apply the patches relevant to this patchset. Sorry for late applying >> this. > > I would like to test UHS and HS200 series on ZynqMP platform. > Is it the branch " testing-uhs-supporting" that I should be using for testing > it? > Please confirm.
That should do, plus look at the uniphier/renesas SDHI patches posted to the ML adding UHS200 support, that should get you started with the arasan IP too. -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
