drm: msm: dsi_panel: add hbm_skip_set_backlight

to skip changing backlight when HBM is enabled

Signed-off-by: Yahya Wessam <yahyawessam2002@gmail.com>

Author: vantoman

drivers/gpu/drm/msm/dsi-staging/dsi_panel.c

@@ -898,6 +898,11 @@ static bool dc_set_backlight(struct dsi_panel *panel, u32 bl_lvl)
 	}
 }
 
+bool hbm_skip_set_backlight(struct dsi_panel *panel, u32 bl_lvl)
+{
+	return panel->hbm_mode && bl_lvl && bl_lvl != 0 && panel->last_bl_lvl != 0;
+}
+
 int dsi_panel_set_backlight(struct dsi_panel *panel, u32 bl_lvl)
 {
 	int rc = 0;
@@ -909,6 +914,11 @@ int dsi_panel_set_backlight(struct dsi_panel *panel, u32 bl_lvl)
 
 	pr_debug("backlight type:%d lvl:%d\n", bl->type, bl_lvl);
 
+	if (hbm_skip_set_backlight(panel, bl_lvl)) {
+		panel->last_bl_lvl = bl_lvl;
+		return rc;
+	}
+
 	if (dc_set_backlight(panel, bl_lvl)) {
 		panel->last_bl_lvl = bl_lvl;
 		pr_debug("set dc backlight bacase dc enable %d, bl %d\n", panel->dc_enable, bl_lvl);