drm/panel: visionox-rm69299: Make use of prepare_prev_first

The DSI link must be powered up to let panel driver to talk to the panel
during prepare() callback execution. Set the prepare_prev_first flag to
guarantee this.

Fixes: 9e15123eca79 ("drm/msm/dsi: Stop unconditionally powering up DSI hosts at modeset")
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patch.msgid.link/20260417-axolotl-display-v2-1-8ce5341e46c2@ixit.cz

diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
index e5e688cf98fdc571ae9726f3c9afe7c83db1caf7..f1430370ff942abdf1789e93f03644aa933629e2 100644 (file)
--- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -376,6 +376,8 @@ static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
                return PTR_ERR(ctx->reset_gpio);
        }
 
+       ctx->panel.prepare_prev_first = true;
+
        ctx->panel.backlight = visionox_rm69299_create_backlight(ctx);
        if (IS_ERR(ctx->panel.backlight))
                return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),