summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/panel/panel-simple.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/panel/panel-simple.c')
-rw-r--r--drivers/gpu/drm/panel/panel-simple.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 5178f87d6574..4aeb960ccf15 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1250,7 +1250,21 @@ static const struct panel_desc boe_nv133fhm_n61 = {
.height = 165,
},
.delay = {
- .hpd_absent_delay = 200,
+ /*
+ * When power is first given to the panel there's a short
+ * spike on the HPD line. It was explained that this spike
+ * was until the TCON data download was complete. On
+ * one system this was measured at 8 ms. We'll put 15 ms
+ * in the prepare delay just to be safe and take it away
+ * from the hpd_absent_delay (which would otherwise be 200 ms)
+ * to handle this. That means:
+ * - If HPD isn't hooked up you still have 200 ms delay.
+ * - If HPD is hooked up we won't try to look at it for the
+ * first 15 ms.
+ */
+ .prepare = 15,
+ .hpd_absent_delay = 185,
+
.unprepare = 500,
},
.bus_format = MEDIA_BUS_FMT_RGB888_1X24,