sunxi: set GMAC TX delay = 0x1 on Cubietruck.
PATCH 1/1 sunxi: set GMAC TX delay = 0x1 on Cubietruck.
Of 4 boards in our automated test system 2 do not have reliable networking with the default TX delay of 0x0. Increasing to 0x1 seems to make things reliable on all 4 boards.
Some previous ad-hpoc tests with tx delay set to 0, 1, 2 and 3 on one of the problematic boards showed:
0: mw.l 0x1c20164 0x006 1 -- t/o in 4/5 tftp runs 1: mw.l 0x1c20164 0x406 1 -- t/o in 1/5 tftp runs 2: mw.l 0x1c20164 0x806 1 -- t/o in 1/5 tftp runs 3: mw.l 0x1c20164 0xc06 1 -- t/o many times in first tftp run
For 0, 1 and 2 "t/o" means one or two "T" glitches in the download, but it did complete. For 3 those were basically continuous and it couldn't complete.
tftp was of a 16M initrd.
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NB, Unlike the normal typo I actually mean to use my citrix address here, since this was done for/at work.
Actual testing was done on v2014.10 with the same direct write hack as BananaPi had in that release (but with value == 1), I can't easily upgrade the remove machines to something newer. The affect of this patch is the same and has been tested on a local board, which didn't have problems to start with however.
--- configs/Cubietruck_defconfig | 1 + 1 file changed, 1 insertion(+)
configs/Cubietruck_defconfig +1 -0
@@ -1,6 +1,7 @@ CONFIG_SPL=y CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER,SUNXI_GMAC,RGMII,AHCI,SATAPWR=SUNXI_GPH(12),USB_EHCI" CONFIG_FDTFILE="sun7i-a20-cubietruck.dtb" +CONFIG_GMAC_TX_DELAY=1 CONFIG_VIDEO_VGA=y CONFIG_ARM=y CONFIG_ARCH_SUNXI=y
Signature · 1 line
2.1.4
PATCH 1/1 sunxi: set GMAC TX delay = 0x1 on Cubietruck.
Hi,
Quoted 12 lines · Ian Campbell
Of 4 boards in our automated test system 2 do not have reliable networking with the default TX delay of
0x0. Increasing to0x1seems to make things reliable on all 4 boards.Some previous ad-hpoc tests with tx delay set to 0, 1, 2 and 3 on one of the problematic boards showed:
0: mw.l 0x1c20164 0x006 1 -- t/o in 4/5 tftp runs 1: mw.l 0x1c20164 0x406 1 -- t/o in 1/5 tftp runs 2: mw.l 0x1c20164 0x806 1 -- t/o in 1/5 tftp runs 3: mw.l 0x1c20164 0xc06 1 -- t/o many times in first tftp run
Quoted 7 lines
For 0, 1 and 2 "t/o" means one or two "T" glitches in the download, but it did complete. For 3 those were basically continuous and it couldn't complete.
tftp was of a 16M initrd.
Signed-off-by Ian Campbell <[email protected]>
Thanks, I've merged this into u-boot-sunxi/master and added this in a small fixed pull-req which I've just send.
Regards,
Hans
Quoted 26 lines
---
NB, Unlike the normal typo I actually mean to use my citrix address here, since this was done for/at work.Actual testing was done on v2014.10 with the same direct write hack as BananaPi had in that release (but with value == 1), I can't easily upgrade the remove machines to something newer. The affect of this patch is the same and has been tested on a local board, which didn't have problems to start with however.
--- configs/Cubietruck_defconfig | 1 + 1 file changed, 1 insertion(+)configs/Cubietruck_defconfig +1
-0@@ -1,6 +1,7 @@ CONFIG_SPL=y CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER,SUNXI_GMAC,RGMII,AHCI,SATAPWR=SUNXI_GPH(12),USB_EHCI" CONFIG_FDTFILE="sun7i-a20-cubietruck.dtb" +CONFIG_GMAC_TX_DELAY=1 CONFIG_VIDEO_VGA=y CONFIG_ARM=y CONFIG_ARCH_SUNXI=y