<p>Felix Held has uploaded this change for <strong>review</strong>.</p><p><a href="https://review.coreboot.org/22592">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">lenovo/x230: increase backlight PWM frequency<br><br>Increase the backlight PWM frequency from 220Hz to 1200Hz to eliminate the<br>flickering of the display backlight. The vendor firmware uses 220Hz here,<br>but since all displays used in the x230 have LED backlight (no CCFL), this<br>shouldn't have downsides.<br><br>Change-Id: I71434233b50e8e2adf47326cd4c4dd98ca38a542<br>Signed-off-by: Felix Held <felix-coreboot@felixheld.de><br>---<br>M src/mainboard/lenovo/x230/devicetree.cb<br>1 file changed, 2 insertions(+), 2 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/22592/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">diff --git a/src/mainboard/lenovo/x230/devicetree.cb b/src/mainboard/lenovo/x230/devicetree.cb<br>index 41e13f6..7e57b57 100644<br>--- a/src/mainboard/lenovo/x230/devicetree.cb<br>+++ b/src/mainboard/lenovo/x230/devicetree.cb<br>@@ -15,8 +15,8 @@<br>     register "gpu_panel_power_backlight_off_delay" = "2100"     # T4: 210ms<br>   register "gfx.use_spread_spectrum_clock" = "1"<br>    register "gfx.link_frequency_270_mhz" = "1"<br>-      register "gpu_cpu_backlight" = "0x1155"<br>-  register "gpu_pch_backlight" = "0x11551155"<br>+      register "gpu_cpu_backlight" = "0x032d"<br>+  register "gpu_pch_backlight" = "0x032d032d"<br> <br>    device cpu_cluster 0 on<br>               chip cpu/intel/socket_rPGA989<br></pre><p>To view, visit <a href="https://review.coreboot.org/22592">change 22592</a>. To unsubscribe, visit <a href="https://review.coreboot.org/settings">settings</a>.</p><div itemscope itemtype="http://schema.org/EmailMessage"><div itemscope itemprop="action" itemtype="http://schema.org/ViewAction"><link itemprop="url" href="https://review.coreboot.org/22592"/><meta itemprop="name" content="View Change"/></div></div>

<div style="display:none"> Gerrit-Project: coreboot </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-MessageType: newchange </div>
<div style="display:none"> Gerrit-Change-Id: I71434233b50e8e2adf47326cd4c4dd98ca38a542 </div>
<div style="display:none"> Gerrit-Change-Number: 22592 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: Felix Held <felix-coreboot@felixheld.de> </div>