On 12/11/2017 04:23 PM, Fabio Estevam wrote: > Hi Marek, Hi!
> On Mon, Dec 11, 2017 at 1:19 PM, Marek Vasut <ma...@denx.de> wrote: >> The DDR DRAM calibration doesn't work on T-topology sometimes, so disable it. >> >> Signed-off-by: Marek Vasut <ma...@denx.de> >> Cc: Stefano Babic <sba...@denx.de> >> --- >> board/dhelectronics/dh_imx6/dh_imx6_spl.c | 4 ---- >> 1 file changed, 4 deletions(-) >> >> diff --git a/board/dhelectronics/dh_imx6/dh_imx6_spl.c >> b/board/dhelectronics/dh_imx6/dh_imx6_spl.c >> index bb98f39f02..57ae7f15ce 100644 >> --- a/board/dhelectronics/dh_imx6/dh_imx6_spl.c >> +++ b/board/dhelectronics/dh_imx6/dh_imx6_spl.c >> @@ -387,10 +387,6 @@ void board_init_f(ulong dummy) >> &dhcom6sdl_grp_ioregs); >> mx6_dram_cfg(&dhcom_ddr_info, &dhcom_mmdc_calib, &dhcom_mem_ddr); >> >> - /* Perform DDR DRAM calibration */ >> - udelay(100); >> - mmdc_do_dqs_calibration(&dhcom_ddr_info); > > I also observed mmdc_do_dqs_calibration() failures and after applying > this patch from Eric they were gone: > https://lists.denx.de/pipermail/u-boot/2016-November/271596.html > > Does this help to solve the mmdc_do_dqs_calibration() on your case too? Nope, I'm not getting calibration failures, I'm getting bitflips at runtime IFF I use the calibration. The calibration itself passes just fine. -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
