From 089790c7a32f92a433cb8aa6c3342d4f235e2f33 Mon Sep 17 00:00:00 2001 From: Nico Huber Date: Sat, 25 Jan 2020 20:24:20 +0100 Subject: mb/lenovo/t400: Configure panel-power sequencing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-on: https://review.coreboot.org/c/coreboot/+/38576 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons Reviewed-by: Kyösti Mälkki --- src/mainboard/lenovo/t400/devicetree.cb | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/mainboard/lenovo/t400') 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 -- cgit v1.2.3