drm/panel: jadard-jd9365da-h3: set prepare_prev_first

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>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-13-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

diff --git a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
index 796cc2368477c1d8d0598ef3693823bb22030f1d..bc079b97cfb3fce02d0c891894f09bc22f9ffe2a 100644 (file)
--- a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
+++ b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
@@ -1666,6 +1666,8 @@ 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);