Patchwork [meta-texasinstruments,v3] linux-omap: Fix MMC timeout Errors

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Submitter Joel A Fernandes
Date July 26, 2011, 7:27 a.m.
Message ID <1311665261-11839-1-git-send-email-agnel.joel@gmail.com>
Download mbox | patch
Permalink /patch/8519/
State New, archived
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Joel A Fernandes - July 26, 2011, 7:27 a.m.
This fixes MMC errors due to timeouts on certain SD Cards following suggestions
to set dto to 14 by Jason Kridner and Steven Kipisz

Details of the issue:
http://talk.maemo.org/showthread.php?p=1000707#post1000707

This fix proposed by Sukumar Ghoral of TI.

Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>
---
Generated a patch that applies to meta-texasinstruments as suggested by Koen in the post at [1]

Changes in v2:
* Bumped PR

Changes in v3:
* Added SOB line

[1] http://www.mail-archive.com/openembedded-devel@lists.openembedded.org/msg19995.html

 ...mc-Adjust-dto-to-eliminate-timeout-errors.patch |   33 ++++++++++++++++++++
 recipes-kernel/linux/linux-omap_2.6.39.bb          |    3 +-
 2 files changed, 35 insertions(+), 1 deletions(-)
 create mode 100644 recipes-kernel/linux/linux-omap-2.6.39/beagle/0007-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch

Patch

diff --git a/recipes-kernel/linux/linux-omap-2.6.39/beagle/0007-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch b/recipes-kernel/linux/linux-omap-2.6.39/beagle/0007-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch
new file mode 100644
index 0000000..8cd314c
--- /dev/null
+++ b/recipes-kernel/linux/linux-omap-2.6.39/beagle/0007-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch
@@ -0,0 +1,33 @@ 
+From bd0b2f97c48aa6aac0c6a494f1c6ba5af5de486b Mon Sep 17 00:00:00 2001
+From: Steve Sakoman <steve@sakoman.com>
+Date: Mon, 18 Jul 2011 23:13:41 -0500
+Subject: [PATCH] omap_hsmmc: Set dto to max value of 14 to avoid SD Card timeouts
+
+This fixes MMC errors due to timeouts on certain SD Cards following suggestions
+to set dto to 14 by Jason Kridner and Steven Kipisz
+
+Details of the issue:
+http://talk.maemo.org/showthread.php?p=1000707#post1000707
+
+This fix was originally proposed by Sukumar Ghoral of TI.
+---
+ drivers/mmc/host/omap_hsmmc.c |    3 +++
+ 1 files changed, 3 insertions(+), 0 deletions(-)
+
+diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
+index 9646a75..7443647 100644
+--- a/drivers/mmc/host/omap_hsmmc.c
++++ b/drivers/mmc/host/omap_hsmmc.c
+@@ -1049,6 +1049,9 @@ static void set_data_timeout(struct omap_hsmmc_host *host,
+ 			dto = 14;
+ 	}
+ 
++	/* Set dto to max value of 14 to avoid SD Card timeouts */
++	dto = 14;
++
+ 	reg &= ~DTO_MASK;
+ 	reg |= dto << DTO_SHIFT;
+ 	OMAP_HSMMC_WRITE(host->base, SYSCTL, reg);
+-- 
+1.7.0.4
+
diff --git a/recipes-kernel/linux/linux-omap_2.6.39.bb b/recipes-kernel/linux/linux-omap_2.6.39.bb
index c92846d..a22e81f 100644
--- a/recipes-kernel/linux/linux-omap_2.6.39.bb
+++ b/recipes-kernel/linux/linux-omap_2.6.39.bb
@@ -7,7 +7,7 @@  COMPATIBLE_MACHINE = "(beagleboard)"
 
 # The main PR is now using MACHINE_KERNEL_PR, for omap3 see conf/machine/include/omap3.inc
 SRCREV_pn-${PN} = "v2.6.39"
-MACHINE_KERNEL_PR_append = "n"
+MACHINE_KERNEL_PR_append = "o"
 
 FILESPATHPKG_prepend = "linux-omap-2.6.39:"
 
@@ -54,6 +54,7 @@  SRC_URI_append = " \
            file://beagle/0004-OMAP3-beagle-add-regulators-for-camera-interface.patch \
            file://beagle/0005-OMAP3-beagle-HACK-add-in-1GHz-OPP.patch \
            file://beagle/0006-OMAP3-BEAGLE-fix-RTC.patch \
+           file://beagle/0007-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch \
            \
            file://camera/0001-Add-driver-for-Aptina-Micron-mt9p031-sensor.patch \
            file://camera/0002-v4l-Add-mt9v032-sensor-driver.patch \