commit 7dc8f9312dfe655dada9be48d15d8cf6aef0de94
author limin.tian <limin.tian@amlogic.com> Wed Jan 08 11:23:21 2025 +0000
committer gerrit autosubmit <gerrit.autosubmit@amlogic.com> Mon Jan 13 05:13:37 2025 -0800
tree 6c91bb6bddb35c898748635560a7acedda8a1898
parent e80d1fe775ddf4062f7a315e8daad7669c42a848

libdrm-meson: modify vsync interval calculation [1/1]

PD#SWPL-197779

Problem:
vsync interval not correct for 59hz mode for LVDS connector.

Solution:
refine vsync interval calculation

Verify:
t5w

Change-Id: I7d356614e8989141409e1c0b1613f886936f974e
Signed-off-by: limin.tian <limin.tian@amlogic.com>

meson/meson_drm_display.c

diff --git a/meson/meson_drm_display.c b/meson/meson_drm_display.c
index 4c449e1..76d2e07 100644
--- a/meson/meson_drm_display.c
+++ b/meson/meson_drm_display.c
@@ -694,7 +694,12 @@
         if ( ( mode.vrefresh == 60 || mode.vrefresh == 30 || mode.vrefresh == 24
                || mode.vrefresh == 120 || mode.vrefresh == 240 )
             && _get_frac_rate_policy(drmFd) == 1 ) {
-           *refreshInterval = (1000000LL+(mode.vrefresh/2)) * 1001 / mode.vrefresh / 1000;
+            *refreshInterval = (1000000LL+(mode.vrefresh/2)) * 1001 / mode.vrefresh / 1000;
+        }
+        //for LVDS platform, 59hz means 59.94hz
+        if (mode.vrefresh == 59) {
+            mode.vrefresh = 60;
+            *refreshInterval = (1000000LL+(mode.vrefresh/2)) * 1001 / mode.vrefresh / 1000;
         }
     } else {
         DEBUG("%s %d get mode fail, refreshInterval default to 0",__FUNCTION__,__LINE__);