@@ -1699,6 +1699,47 @@ void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
}
EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
+int dw_hdmi_suspend(struct device *dev)
+{
+ struct dw_hdmi *hdmi = dev_get_drvdata(dev);
+ u8 ih_mute;
+
+ /* Disable all interrupts */
+ hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
+
+ /* Disable top level interrupt bits in HDMI block */
+ ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
+ HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
+ HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
+
+ hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_suspend);
+
+int dw_hdmi_resume(struct device *dev)
+{
+ struct dw_hdmi *hdmi = dev_get_drvdata(dev);
+
+ /*
+ * Configure registers related to HDMI interrupt
+ * generation before registering IRQ.
+ */
+ hdmi_writeb(hdmi, HDMI_PHY_HPD, HDMI_PHY_POL0);
+
+ /* Clear Hotplug interrupts */
+ hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD, HDMI_IH_PHY_STAT0);
+
+ dw_hdmi_fb_registered(hdmi);
+
+ /* Unmute interrupts */
+ hdmi_writeb(hdmi, ~HDMI_IH_PHY_STAT0_HPD, HDMI_IH_MUTE_PHY_STAT0);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_resume);
+
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
@@ -53,6 +53,8 @@ struct dw_hdmi_plat_data {
struct drm_display_mode *mode);
};
+int dw_hdmi_resume(struct device *dev);
+int dw_hdmi_suspend(struct device *dev);
void dw_hdmi_unbind(struct device *dev, struct device *master, void *data);
int dw_hdmi_bind(struct device *dev, struct device *master,
void *data, struct drm_encoder *encoder,
when kernel enter into suspend, cpus will shutdown, hdmi registers will reset invisibly. After kernel resume, drm core will call the bridge enable function. All of hdmi registers will be setup again except the interrupt registers. In that case we should mute all the interrupt in suspend stage, and umnute the interrupt we need in the resume stage. Signed-off-by: Yakir Yang <ykk@rock-chips.com> --- Changes in v3: - Clear Hotplug interrupts before dw_hdmi_fb_register Changes in v2: - Add irq control to suspend/resume interfaces drivers/gpu/drm/bridge/dw_hdmi.c | 41 ++++++++++++++++++++++++++++++++++++++++ include/drm/bridge/dw_hdmi.h | 2 ++ 2 files changed, 43 insertions(+)