Hi Richard,
Le 18/10/2010 10:48, Zhu Richard-R65037 a écrit :
I tested your serial patches with Eric's platform related codes on i.MX51 BBG3.0 board.
Two phenomena:
The debug msg "mmc0: mmc_rescan: trying to init card at 400000 Hz..." are dumped out repeatedly.
ROOT: There are pr_info codes in the mmc_rescan func.
fixed by this patch :
http://git.kernel.org/?p=linux/kernel/git/cjb/mmc.git;a=commit;h=0ca6d53ec81a13263f6643372b2a5abf7818e8fa
The other:
Encounter the Timeout and CRC error when the sandisk 4G SDHC card are used as the ROOTFS storage media
When I boot up the BBG board.
It seems that the "SDHCI_QUIRK_BROKEN_TIMEOUT_VAL" is mandatory required at my side when I did the tests
on BBG3.0 board, and the i.MX51 board can support the "MULTI-BLOCK".
you seems to be right, the attached patch seems to fix it (tested on our board
using a Linaro rootfs on a Transcend SDHC card and I didn't get errors after
applying this patch but I'm stopped by udev errors now with this rootfs).
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c
b/drivers/mmc/host/sdhci-esdhc-imx.c
index 2e9cca1..e8f7048 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -134,7 +134,8 @@ static struct sdhci_ops sdhci_esdhc_ops = {
struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_MULTIBLOCK
- | SDHCI_QUIRK_BROKEN_ADMA,
+ | SDHCI_QUIRK_BROKEN_ADMA
+ | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
/* ADMA has issues. Might be fixable */
/* NO_MULTIBLOCK might be MX35 only (Errata: ENGcm07207) */
.ops = &sdhci_esdhc_ops,
What's kinds of tests and environment you did at your side?
Environment : our i.MX515 based boards.
Tests (until now) : mount + a few read/write.
We have a nand flash on board so our rootfs is on it so I didn't test a rootfs
until this morning.
Eric
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