[PATCH v2 13/21] drm/panel: jadard-jd9365da-h3: set prepare_prev_first

Dmitry Baryshkov
2026-04-11T12:11:18Z

Sending DSI commands from the prepare() callback requires DSI link to be
up at that point. For DSI hosts is guaranteed only if the panel driver
sets the .prepare_prev_first flag. Set it to let these panels work with
the DSI hosts which don't power on the link in their .mode_set callback.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Tested-by: Riccardo Mereu <r.mereu@arduino.cc>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
index 5d9db2e1f28f..11b7e07c1af8 100644
--- a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
+++ b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
@@ -1652,6 +1652,8 @@ static int jadard_dsi_probe(struct mipi_dsi_device *dsi)
if (ret)
return ret;

+ jadard->panel.prepare_prev_first = true;
+
drm_panel_add(&jadard->panel);

mipi_dsi_set_drvdata(dsi, jadard);

--
2.47.3