drm/panel: sharp-ls043t1le01: 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: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260323-panel-fix-v1-1-9f12b09161e8@oss.qualcomm.com

diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
index 36abfa2e65e962af2a08aec3e63ba1077a2c43d4..dd1eaba23ad3c69de49741657ce9490cde11ab74 100644 (file)
--- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -201,6 +201,7 @@ static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 
        drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
                       &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+       sharp_nt->base.prepare_prev_first = true;
 
        ret = drm_panel_of_backlight(&sharp_nt->base);
        if (ret)