From 20cb85fa985206fe1d51f87d4fcb9c95e5b44f7a Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Sat, 29 Apr 2017 14:31:32 +0200 Subject: nb/intel/gm45: Set display backlight according to EDID string Add some known good values for some thinkpads displays. Known good means that at this pwm frequency the display is evenly lit on all duty cycles, the display makes minimal to no noise at lower duty cycles and the display does not flicker. This values differs from vendor (which uses an obviously wrong display clock (190MHz instead of 320MHz) resulting in frequency more than 60% off the intended value. TESTED on Thinkpad X200 with edid ascii string in list and removed from list to see if notice message is shown. Change-Id: Id7bc0d453fac31e806852206ba2c895720b2c843 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/19500 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber --- src/mainboard/roda/rk9/Makefile.inc | 1 + src/mainboard/roda/rk9/blc.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+) create mode 100644 src/mainboard/roda/rk9/blc.c (limited to 'src/mainboard/roda/rk9') diff --git a/src/mainboard/roda/rk9/Makefile.inc b/src/mainboard/roda/rk9/Makefile.inc index 5a16ed8de9..f92382ee43 100644 --- a/src/mainboard/roda/rk9/Makefile.inc +++ b/src/mainboard/roda/rk9/Makefile.inc @@ -15,3 +15,4 @@ ramstage-$(CONFIG_CARDBUS_PLUGIN_SUPPORT) += ti_pci7xx1.c ramstage-y += cstates.c +ramstage-y += blc.c diff --git a/src/mainboard/roda/rk9/blc.c b/src/mainboard/roda/rk9/blc.c new file mode 100644 index 0000000000..4b6104ec05 --- /dev/null +++ b/src/mainboard/roda/rk9/blc.c @@ -0,0 +1,22 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2017 arthur@aheymans.xyz + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include + +int get_blc_values(const struct blc_pwm_t **entries) +{ + return 0; +} -- cgit v1.2.3