This fixes MMC errors due to timeouts, and is borrowed from Steve Sakoman's patch for the linux-omap-2.6.39 recipe (as noticed by Jason Kridner)
Signed-off-by: Joel A Fernandes <agnel.j...@gmail.com> --- Changes since v2: * Applied the patch to the correct recipe (linux-omap-psp-2.6.32 instead of linux-omap-2.6.32) (Sorry!) * Moved author name to commit message A link shared by Jason discussing the issue: http://www.mail-archive.com/linux-omap@vger.kernel.org/msg42214.html Paul, This is an actual problem that we experience and this patch seems to fix it. Patch: http://cgit.openembedded.net/cgit.cgi/openembedded/tree/recipes/linux/linux-omap-2.6.39/sakoman/0024-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch --- ...mc-Adjust-dto-to-eliminate-timeout-errors.patch | 22 ++++++++++++++++++++ recipes/linux/linux-omap-psp_2.6.32.bb | 1 + 2 files changed, 23 insertions(+), 0 deletions(-) create mode 100644 recipes/linux/linux-omap-psp-2.6.32/0047-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch diff --git a/recipes/linux/linux-omap-psp-2.6.32/0047-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch b/recipes/linux/linux-omap-psp-2.6.32/0047-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch new file mode 100644 index 0000000..4867d3f --- /dev/null +++ b/recipes/linux/linux-omap-psp-2.6.32/0047-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch @@ -0,0 +1,22 @@ +From 26a79f408bd41ad7b4a47f2683909d3fc1575eab Mon Sep 17 00:00:00 2001 +From: Steve Sakoman <st...@sakoman.com> +Date: Wed, 12 Jan 2011 05:54:55 -0800 +Subject: [PATCH] omap: mmc: Adjust dto to eliminate timeout errors + +A number of SD card types were experiencing timeout errors. This +could also lead to data corruption in some cases. + +This fix proposed by Sukumar Ghoral of TI. +--- +diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c +index 9646a75..ef458d6 100644 +--- a/drivers/mmc/host/omap_hsmmc.c ++++ b/drivers/mmc/host/omap_hsmmc.c +@@ -1032,6 +1032,7 @@ static void set_data_timeout(struct omap_hsmmc_host *host, + cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd); + timeout = timeout_ns / cycle_ns; + timeout += timeout_clks; ++ timeout *= 2; + if (timeout) { + while ((timeout & 0x80000000) == 0) { + dto += 1; diff --git a/recipes/linux/linux-omap-psp_2.6.32.bb b/recipes/linux/linux-omap-psp_2.6.32.bb index a076bf1..e6c97ed 100644 --- a/recipes/linux/linux-omap-psp_2.6.32.bb +++ b/recipes/linux/linux-omap-psp_2.6.32.bb @@ -59,6 +59,7 @@ SRC_URI = "git://arago-project.org/git/projects/linux-omap3.git;protocol=http;br file://0044-ARM-OMAP-beagle-every-known-beagle-except-revB-uses-.patch \ file://0045-ARM-OMAP-beagle-add-support-for-beagleFPGA-expansion.patch \ file://0046-ARM-OMAP-beagle-disable-uart-timeout.patch \ + file://0047-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch \ file://cam/0001-mt9t111-first-stab-at-merging-sensor-driver-based-on.patch \ file://cam/0002-mt9t111-Fix-all-checkpatch-errors.patch \ file://cam/0003-mt9t111-Pass-v4l2_int_device-data.patch \ -- 1.7.0.4 _______________________________________________ Openembedded-devel mailing list Openembedded-devel@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel