linux-kernel - [PATCH] drm/panel: ilitek-ili9882t: Fine-tune HFP for tianma,tl121bvms07-00

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20260209090759.3952404-1-yelangyan@huaqin.corp-partner.google.com>
Date: Mon,  9 Feb 2026 17:07:59 +0800
From: Langyan Ye <yelangyan@...qin.corp-partner.google.com>
To: neil.armstrong@...aro.org,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Langyan Ye <yelangyan@...qin.corp-partner.google.com>
Subject: [PATCH] drm/panel: ilitek-ili9882t: Fine-tune HFP for tianma,tl121bvms07-00

The measured refresh rate is around 120.4Hz, which does not meet the
requirements of the stylus and causes it to malfunction.

After the adjustment, the refresh rate is measured at 120Hz, which meets
the requirements for proper stylus operation.

Signed-off-by: Langyan Ye <yelangyan@...qin.corp-partner.google.com>
---
 drivers/gpu/drm/panel/panel-ilitek-ili9882t.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
index 370424ddfc80..6f9d4a4198a9 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
@@ -689,9 +689,9 @@ static const struct drm_display_mode starry_ili9882t_default_mode = {
 static const struct drm_display_mode tianma_il79900a_default_mode = {
 	.clock = 543850,
 	.hdisplay = 1600,
-	.hsync_start = 1600 + 20,
-	.hsync_end = 1600 + 20 + 2,
-	.htotal = 1600 + 20 + 2 + 20,
+	.hsync_start = 1600 + 18,
+	.hsync_end = 1600 + 18 + 2,
+	.htotal = 1600 + 18 + 2 + 20,
 	.vdisplay = 2560,
 	.vsync_start = 2560 + 62,
 	.vsync_end = 2560 + 62 + 2,
-- 
2.34.1