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| author | Nico Huber <nico.h@gmx.de> | 2020-01-25 20:24:20 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-02-09 19:33:40 +0000 |
| commit | 089790c7a32f92a433cb8aa6c3342d4f235e2f33 (patch) | |
| tree | 99205b5fc7f6fcd41ece09fae98f2cbd38e2f8da /src/mainboard/lenovo | |
| parent | d666ee86a480fbbff5b13249750a7b5d9f5b687e (diff) | |
| download | coreboot-089790c7a32f92a433cb8aa6c3342d4f235e2f33.tar.xz | |
mb/lenovo/t400: Configure panel-power sequencing
If the panel-power sequencer is not configured, libgfxinit falls back
to very conservative defaults (210ms before EDID is probed). This
results in a boot penalty of >100ms (depending on how long it takes
to probe other ports).
Values are taken from the VBTs already checked in. Untested.
Change-Id: I189776ce8684b4c3c01acd6d2fc433ca33a050d5
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38576
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/mainboard/lenovo')
| -rw-r--r-- | src/mainboard/lenovo/t400/devicetree.cb | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t400/devicetree.cb b/src/mainboard/lenovo/t400/devicetree.cb index 9561dfa93f..0eea193a13 100644 --- a/src/mainboard/lenovo/t400/devicetree.cb +++ b/src/mainboard/lenovo/t400/devicetree.cb @@ -3,6 +3,11 @@ chip northbridge/intel/gm45 register "gfx.ndid" = "3" register "gfx.did" = "{ 0x80000100, 0x80000240, 0x80000410, 0x80000410, 0x00000005 }" + register "gpu_panel_power_up_delay" = "250" # T1+T2: 25ms + register "gpu_panel_power_down_delay" = "250" # T3: 25ms + register "gpu_panel_power_backlight_on_delay" = "2500" # T5: 250ms + register "gpu_panel_power_backlight_off_delay" = "2500" # Tx: 250ms + register "gpu_panel_power_cycle_delay" = "3" # T4: 200ms register "gfx.use_spread_spectrum_clock" = "1" device cpu_cluster 0 on |