From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: linux-mmc@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Chris Ball <chris@printf.net>,
Ulf Hansson <ulf.hansson@linaro.org>,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH RFC 3/5] mmc: mmci: relax blksz check for SDIO
Date: Wed, 13 Aug 2014 06:14:44 +0100 [thread overview]
Message-ID: <53EAF444.8050507@linaro.org> (raw)
In-Reply-To: <20140812141242.GI30401@n2100.arm.linux.org.uk>
Thankyou for the feedback.
On 12/08/14 15:12, Russell King - ARM Linux wrote:
> On Tue, Aug 12, 2014 at 01:04:40PM +0100, Srinivas Kandagatla wrote:
>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>>
>> This patch adds condition in mmci_validate_data to skip checking
>> blocksize for SDIO card types. SDIO card type can issue blocksizes
>> which are not exactly power of 2 so this check always fails, resulting
>> in SDIO failures.
>
> Do you understand why this check is there?
>
> Do you realise that the standard MMCI from ARM Ltd can /only/ perform
> power-of-2 block transfers?
Yes, I noticed that in pl180 TRM. I agree this patch will break standard
MMCI.
In the past Ulf Hansson and Stefan Nilsson have submitted a patch to fix
this issue for ux500v2. This patch adds new flag non_power_of_2_blksize
/ any_blksize to variant_data.
http://www.spinics.net/lists/linux-mmc/msg12160.html
http://marc.info/?l=linux-mmc&m=131710963908853&w=2
This patch will fix the issue for Qcom too. If you are Ok with adding
new flag non_power_of_2_blksize/any_blksize in the variant_data, I can
rebase and include Ulf's patch in next version.
thanks,
--srini
>
> Hence, NAK on this change as it stands.
>
next prev parent reply other threads:[~2014-08-13 5:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-12 12:02 [PATCH RFC 0/5] mmc: mmci: sdio related fixes Srinivas Kandagatla
2014-08-12 12:03 ` [PATCH RFC 1/5] mmc: mmci: Enable SDIO support for Qualcomm variant data Srinivas Kandagatla
2014-08-12 12:03 ` [PATCH RFC 2/5] mmc: mmci: move block size validation under relevant code Srinivas Kandagatla
2014-08-12 12:04 ` [PATCH RFC 3/5] mmc: mmci: relax blksz check for SDIO Srinivas Kandagatla
2014-08-12 14:12 ` Russell King - ARM Linux
2014-08-13 5:14 ` Srinivas Kandagatla [this message]
2014-08-13 8:54 ` Linus Walleij
2014-08-12 12:05 ` [PATCH RFC 4/5] mmc: mmci: Add sdio enable mask in variant data Srinivas Kandagatla
2014-08-13 8:55 ` Linus Walleij
2014-08-12 12:05 ` [PATCH RFC 5/5] mmc: mmci: move ST specific sdio setup under a condition Srinivas Kandagatla
2014-08-13 8:58 ` Linus Walleij
2014-08-13 9:45 ` Srinivas Kandagatla
2014-08-19 11:13 ` [PATCH v2 0/4] mmc: mmci: sdio related fixes Srinivas Kandagatla
2014-08-19 11:14 ` [PATCH v2 1/4] mmc: mmci: Support any block sizes for ux500v2 and qcom variant Srinivas Kandagatla
2014-08-19 12:37 ` Ulf Hansson
2014-08-19 11:14 ` [PATCH v2 2/4] mmc: mmci: move block size validation under relevant code Srinivas Kandagatla
2014-08-19 11:55 ` Ulf Hansson
2014-08-19 12:08 ` Srinivas Kandagatla
2014-08-19 11:15 ` [PATCH v2 3/4] mmc: mmci: Add sdio enable mask in variant data Srinivas Kandagatla
2014-08-19 11:15 ` [PATCH v2 4/4] mmc: mmci: rename sdio flag in vendor data to st_sdio Srinivas Kandagatla
2014-08-22 4:53 ` [PATCH v3 0/3] mmc: mmci: sdio related fixes Srinivas Kandagatla
2014-08-22 4:54 ` [PATCH v3 1/3] mmc: mmci: Support any block sizes for ux500v2 and qcom variant Srinivas Kandagatla
2014-09-10 7:58 ` Ulf Hansson
2014-09-10 9:07 ` Srinivas Kandagatla
2014-09-10 10:51 ` Ulf Hansson
2015-07-09 21:40 ` Bjorn Andersson
2019-03-05 22:25 ` Linus Walleij
2019-03-06 17:03 ` Bjorn Andersson
2014-08-22 4:54 ` [PATCH v3 2/3] mmc: mmci: Add sdio enable mask in variant data Srinivas Kandagatla
2014-09-10 7:47 ` Ulf Hansson
2014-08-22 4:55 ` [PATCH v3 3/3] mmc: mmci: rename sdio flag in vendor data to st_sdio Srinivas Kandagatla
2014-09-10 7:48 ` Ulf Hansson
2014-09-09 8:34 ` [PATCH] mmc: mmci_qcom_dml: fix is never less than zero warning Srinivas Kandagatla
2014-09-09 11:53 ` Ulf Hansson
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