From: max.oss.09@gmail.com
To: Max Krummenacher <max.krummenacher@toradex.com>
Cc: Adrien Grassein <adrien.grassein@gmail.com>,
Andrzej Hajda <andrzej.hajda@intel.com>,
David Airlie <airlied@gmail.com>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Jonas Karlman <jonas@kwiboo.se>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Robert Foss <rfoss@kernel.org>, Simona Vetter <simona@ffwll.ch>,
Thomas Zimmermann <tzimmermann@suse.de>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH] drm/bridge: lontium-lt8912b: Do not generate HFP
Date: Mon, 28 Jul 2025 17:00:50 +0200 [thread overview]
Message-ID: <20250728150059.2642055-1-max.oss.09@gmail.com> (raw)
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
next reply other threads:[~2025-07-28 15:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-28 15:00 max.oss.09 [this message]
2025-09-11 15:34 ` [PATCH] drm/bridge: lontium-lt8912b: Do not generate HFP Francesco Dolcini
2025-10-27 10:14 ` Max Krummenacher
2026-04-29 13:33 ` Francesco Dolcini
2026-04-30 7:53 ` Luca Ceresoli
2026-04-30 8:05 ` Adrien Grassein
2026-04-30 8:15 ` Francesco Dolcini
2026-05-04 10:41 ` Luca Ceresoli
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