* [PATCH] drm/bridge: lontium-lt8912b: Do not generate HFP
@ 2025-07-28 15:00 max.oss.09
0 siblings, 0 replies; only message in thread
From: max.oss.09 @ 2025-07-28 15:00 UTC (permalink / raw)
To: Max Krummenacher
Cc: Adrien Grassein, Andrzej Hajda, David Airlie, Jernej Skrabec,
Jonas Karlman, Laurent Pinchart, Maarten Lankhorst, Maxime Ripard,
Neil Armstrong, Robert Foss, Simona Vetter, Thomas Zimmermann,
dri-devel, linux-kernel
From: Max Krummenacher <max.krummenacher@toradex.com>
The datasheet of lontium-lt8912b doesn't require blanking during
the HFP period. Thus use LP during HFP.
Tested with a samsung-dsim (i.MX8 MM) and a tc358768 DPI to DSI bridge
as the DSI host.
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
---
drivers/gpu/drm/bridge/lontium-lt8912b.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 3e49d855b364..760d89493276 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -494,6 +494,7 @@ static int lt8912_attach_dsi(struct lt8912 *lt)
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_LPM |
+ MIPI_DSI_MODE_VIDEO_NO_HFP |
MIPI_DSI_MODE_NO_EOT_PACKET;
ret = devm_mipi_dsi_attach(dev, dsi);
--
2.42.0
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