drm: panel: jdi-lt070me05000: Add prepare_upstream_first flag

The panel driver wants to send DCS commands from the prepare
hook, therefore the DSI host wants to be pre_enabled first.
Set the flag to achieve this.

https://forums.raspberrypi.com/viewtopic.php?t=354708

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index f0041bc..50c1622 100644 (file)
--- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -429,6 +429,7 @@ static int jdi_panel_add(struct jdi_panel *jdi)
                return dev_err_probe(dev, PTR_ERR(jdi->backlight),
                                     "failed to register backlight %d\n", ret);
 
+       jdi->base.prepare_prev_first = true;
        drm_panel_init(&jdi->base, &jdi->dsi->dev, &jdi_panel_funcs,
                       DRM_MODE_CONNECTOR_DSI);