Re: [U-Boot] [PATCH] configs: tbs_a711: lower dram frequency
On Mon, Feb 11, 2019 at 5:39 PM Tomas Novotny wrote: > > Hi Jagan, > > On Sat, 9 Feb 2019 21:47:12 +0530, Jagan Teki > wrote: > > On Tue, Feb 5, 2019 at 7:27 PM Tomas Novotny wrote: > > > > > > The dram chip on the tablet was changed. The new one requires a lower > > > frequency, so change it. > > > > > > Frequency 564 was also stable in the tests, but use slightly lower one > > > to be on a safe side. > > > > New rate? How does it compatible with legacy devices? > > The new frequency is lower and the devices from all batches work. This patch > is used in all our devices for ~year without any problem. Yes, the > performance suffers a bit. OK. > > BTW I just noticed that I missed the 'MHz' after the frequency in the commit > message. Fixed it in commit message and Applied to u-boot-sunxi/master ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
Re: [U-Boot] [PATCH] configs: tbs_a711: lower dram frequency
Hi Jagan, On Sat, 9 Feb 2019 21:47:12 +0530, Jagan Teki wrote: > On Tue, Feb 5, 2019 at 7:27 PM Tomas Novotny wrote: > > > > The dram chip on the tablet was changed. The new one requires a lower > > frequency, so change it. > > > > Frequency 564 was also stable in the tests, but use slightly lower one > > to be on a safe side. > > New rate? How does it compatible with legacy devices? The new frequency is lower and the devices from all batches work. This patch is used in all our devices for ~year without any problem. Yes, the performance suffers a bit. BTW I just noticed that I missed the 'MHz' after the frequency in the commit message. Tomas ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
Re: [U-Boot] [PATCH] configs: tbs_a711: lower dram frequency
On Tue, Feb 5, 2019 at 7:27 PM Tomas Novotny wrote: > > The dram chip on the tablet was changed. The new one requires a lower > frequency, so change it. > > Frequency 564 was also stable in the tests, but use slightly lower one > to be on a safe side. New rate? How does it compatible with legacy devices? ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
[U-Boot] [PATCH] configs: tbs_a711: lower dram frequency
The dram chip on the tablet was changed. The new one requires a lower frequency, so change it. Frequency 564 was also stable in the tests, but use slightly lower one to be on a safe side. Signed-off-by: Tomas Novotny --- configs/tbs_a711_defconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/configs/tbs_a711_defconfig b/configs/tbs_a711_defconfig index 103ce9be46..2b2d7ade2a 100644 --- a/configs/tbs_a711_defconfig +++ b/configs/tbs_a711_defconfig @@ -3,7 +3,7 @@ CONFIG_ARCH_SUNXI=y CONFIG_SPL=y CONFIG_MACH_SUN8I_A83T=y CONFIG_DRAM_TYPE=7 -CONFIG_DRAM_CLK=648 +CONFIG_DRAM_CLK=552 CONFIG_DRAM_ZQ=15355 CONFIG_DRAM_ODT_EN=y CONFIG_MMC_SUNXI_SLOT_EXTRA=2 -- 2.12.3 ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
