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| author | Alper Nebi Yasak <alpernebiyasak@gmail.com> | 2020-10-06 23:39:51 +0300 |
|---|---|---|
| committer | Kever Yang <kever.yang@rock-chips.com> | 2020-10-30 18:20:03 +0800 |
| commit | 127c8d85cf4420167ed577121ea62f56ce13635e (patch) | |
| tree | bc8d9b59dfb8a103a2833b7c83b8368f66e716eb /drivers/ddr/imx/imx8m/ddr_init.c | |
| parent | 2db36c64bd5a8910112708c1c6b68bd3594517d3 (diff) | |
| download | u-boot-127c8d85cf4420167ed577121ea62f56ce13635e.tar.gz u-boot-127c8d85cf4420167ed577121ea62f56ce13635e.tar.xz u-boot-127c8d85cf4420167ed577121ea62f56ce13635e.zip | |
video: rockchip: Add missing dpcd_write() call to link_train_ce()
Found this by comparing it to the coreboot driver, a form of this call
was introduced there in their commit b9a7877568cf ("rockchip/*: refactor
edp driver"). This is copy-pasted from U-Boot's link_train_cr() slightly
above it.
Without this on a gru-kevin chromebook, I have:
clock recovery at voltage 0 pre-emphasis 0
requested signal parameters: lane 0 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 3.5dB
using signal parameters: voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 0 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 3.5dB
using signal parameters: voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 0 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 3.5dB
using signal parameters: voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 0 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 3.5dB
using signal parameters: voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 0 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 3.5dB
using signal parameters: voltage 0.4V pre_emph 3.5dB
channel eq failed, ret=-5
link train failed!
rk_vop_probe() Device failed: ret=-5
With this, it looks like training succeeds:
clock recovery at voltage 0 pre-emphasis 0
requested signal parameters: lane 0 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 3.5dB
using signal parameters: voltage 0.4V pre_emph 3.5dB
requested signal parameters: lane 0 voltage 0.4V pre_emph 6dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 6dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 6dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 6dB
using signal parameters: voltage 0.4V pre_emph 6dB
requested signal parameters: lane 0 voltage 0.4V pre_emph 0dB
requested signal parameters: lane 1 voltage 0.4V pre_emph 0dB
requested signal parameters: lane 2 voltage 0.4V pre_emph 0dB
requested signal parameters: lane 3 voltage 0.4V pre_emph 0dB
using signal parameters: voltage 0.4V pre_emph 0dB
channel eq at voltage 0 pre-emphasis 0
config video failed
rk_vop_probe() Device failed: ret=-110
The "config video failed" error also goes away when I disable higher
log levels, and it claims to have successfully probed the device.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang<kever.yang@rock-chips.com>
Diffstat (limited to 'drivers/ddr/imx/imx8m/ddr_init.c')
0 files changed, 0 insertions, 0 deletions