[coreboot-gerrit] Change in coreboot[master]: lenovo/x230: increase backlight PWM frequency

[Felix Held (Code Review)]

Felix Held has uploaded this change for review. ( https://review.coreboot.org/22592


Change subject: lenovo/x230: increase backlight PWM frequency
......................................................................

lenovo/x230: increase backlight PWM frequency

Increase the backlight PWM frequency from 220Hz to 1200Hz to eliminate the
flickering of the display backlight. The vendor firmware uses 220Hz here,
but since all displays used in the x230 have LED backlight (no CCFL), this
shouldn't have downsides.

Change-Id: I71434233b50e8e2adf47326cd4c4dd98ca38a542
Signed-off-by: Felix Held <felix-coreboot at felixheld.de>
---
M src/mainboard/lenovo/x230/devicetree.cb
1 file changed, 2 insertions(+), 2 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/22592/1

diff --git a/src/mainboard/lenovo/x230/devicetree.cb b/src/mainboard/lenovo/x230/devicetree.cb
index 41e13f6..7e57b57 100644
--- a/src/mainboard/lenovo/x230/devicetree.cb
+++ b/src/mainboard/lenovo/x230/devicetree.cb
@@ -15,8 +15,8 @@
 	register "gpu_panel_power_backlight_off_delay" = "2100"	# T4: 210ms
 	register "gfx.use_spread_spectrum_clock" = "1"
 	register "gfx.link_frequency_270_mhz" = "1"
-	register "gpu_cpu_backlight" = "0x1155"
-	register "gpu_pch_backlight" = "0x11551155"
+	register "gpu_cpu_backlight" = "0x032d"
+	register "gpu_pch_backlight" = "0x032d032d"
 
 	device cpu_cluster 0 on
 		chip cpu/intel/socket_rPGA989

-- 
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I71434233b50e8e2adf47326cd4c4dd98ca38a542
Gerrit-Change-Number: 22592
Gerrit-PatchSet: 1
Gerrit-Owner: Felix Held <felix-coreboot at felixheld.de>
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