drm/vc4: hdmi: Add a spinlock to protect register access

[linux-2.6-microblaze.git] / drivers / gpu / drm / vc4 / vc4_hdmi_regs.h

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
index 99dde6e..fc97150 100644 (file)
--- a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
@@ -442,6 +442,8 @@ static inline void vc4_hdmi_write(struct vc4_hdmi *hdmi,
        const struct vc4_hdmi_variant *variant = hdmi->variant;
        void __iomem *base;
 
+       lockdep_assert_held(&hdmi->hw_lock);
+
        WARN_ON(!pm_runtime_active(&hdmi->pdev->dev));
 
        if (reg >= variant->num_registers) {