sunxi: Remove Orangepi PC RAM speed to 624 MHz
PATCH 1/1 sunxi: Remove Orangepi PC RAM speed to 624 MHz
There are some reports of stability issues at 672 MHz, see:
http://linux-sunxi.org/Orange_Pi_PC#DRAM_clock_speed_limit
So reduce the DRAM speed to 624MHz which seems to be reliable everywhere.
--- configs/orangepi_pc_defconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
configs/orangepi_pc_defconfig +1 -1
@@ -1,7 +1,7 @@ CONFIG_ARM=y CONFIG_ARCH_SUNXI=y CONFIG_MACH_SUN8I_H3=y -CONFIG_DRAM_CLK=672 +CONFIG_DRAM_CLK=624 CONFIG_DRAM_ZQ=3881979 CONFIG_DRAM_ODT_EN=y # CONFIG_VIDEO is not set
Signature · 1 line
2.5.0
PATCH 1/1 sunxi: Remove Orangepi PC RAM speed to 624 MHz
Quoted 2 lines · Hans de Goede
There are some reports of stability issues at 672 MHz, see:
http://linux-sunxi.org/Orange_Pi_PC#DRAM_clock_speed_limit
Looks like only one (in that table at least)? And do we expect this data to remain in the wiki, I suppose so.
In any case, this...
Quoted 2 lines
So reduce the DRAM speed to 624MHz which seems to be reliable everywhere.
...seems reasonable to me.
Quoted 1 line
Signed-off-by Hans de Goede <[email protected]>
PATCH 1/1 sunxi: Remove Orangepi PC RAM speed to 624 MHz
Hi,
Quoted 5 lines · Ian Campbell
Quoted 2 lines · Hans de Goede
There are some reports of stability issues at 672 MHz, see:
http://linux-sunxi.org/Orange_Pi_PC#DRAM_clock_speed_limitLooks like only one (in that table at least)?
Correct, but another 7 out of 13 are only just reliable at 672 and fail one speed step higher, showing that the manufacturer default of 672 is cutting it awfully close to the failure point, this feels like the factory default is actually an overclocked setting.
Quoted 2 lines
And do we expect this
data to remain in the wiki, I suppose so.
Ack.
Quoted 9 lines
In any case, this...
Quoted 2 lines
So reduce the DRAM speed to 624MHz which seems to be reliable everywhere.
...seems reasonable to me.
Quoted 1 line
Signed-off-by Hans de Goede <[email protected]>Acked-by Ian Campbell <[email protected]>
Thanks,
Hans
PATCH 1/1 sunxi: Remove Orangepi PC RAM speed to 624 MHz
In reply to Hans de GoedeQuoted 6 lines
Quoted 1 line
Quoted 1 line
Quoted 1 line
Quoted 1 line
"Hans" == Hans de Goede <[email protected]> writes:
There are some reports of stability issues at 672 MHz, see:
http://linux-sunxi.org/Orange_Pi_PC#DRAM_clock_speed_limitSo reduce the DRAM speed to 624MHz which seems to be reliable everywhere.
With the subject s/Remove/Reduce/
Quoted 25 lines
Signed-off-by Hans de Goede <[email protected]>--- configs/orangepi_pc_defconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)configs/orangepi_pc_defconfig +1
-1@@ -1,7 +1,7 @@ CONFIG_ARM=y CONFIG_ARCH_SUNXI=y CONFIG_MACH_SUN8I_H3=y -CONFIG_DRAM_CLK=672 +CONFIG_DRAM_CLK=624 CONFIG_DRAM_ZQ=3881979 CONFIG_DRAM_ODT_EN=y # CONFIG_VIDEO is not setSignature · 6 lines
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Bye, Peter Korsgaard