From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Add HDMI notifiers to the HDMI bridge driver.
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/Kconfig | 1 +
drivers/gpu/drm/bridge/dw-hdmi.c | 25 ++++++++++++++++++++++++-
2 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 10e12e7..5f4ebe9 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -27,6 +27,7 @@ config DRM_DUMB_VGA_DAC
config DRM_DW_HDMI
tristate
select DRM_KMS_HELPER
+ select HDMI_NOTIFIERS
config DRM_DW_HDMI_AHB_AUDIO
tristate "Synopsis Designware AHB Audio interface"
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index ab7023e..bd02da5 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -16,6 +16,7 @@
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/hdmi.h>
+#include <linux/hdmi-notifier.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/spinlock.h>
@@ -114,6 +115,7 @@ struct dw_hdmi {
struct hdmi_data_info hdmi_data;
const struct dw_hdmi_plat_data *plat_data;
+ struct hdmi_notifier *n;
int vic;
@@ -1448,9 +1450,11 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
drm_mode_connector_update_edid_property(connector, edid);
+ hdmi_event_new_edid(hdmi->n, edid, 0);
ret = drm_add_edid_modes(connector, edid);
/* Store the ELD */
drm_edid_to_eld(connector, edid);
+ hdmi_event_new_eld(hdmi->n, connector->eld);
kfree(edid);
} else {
dev_dbg(hdmi->dev, "failed to get edid\n");
@@ -1579,6 +1583,12 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
dw_hdmi_update_phy_mask(hdmi);
}
mutex_unlock(&hdmi->mutex);
+
+ if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
+ hdmi_event_disconnect(hdmi->n);
+ else if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) ==
+ (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_PHY_HPD))
+ hdmi_event_connect(hdmi->n);
}
if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
@@ -1732,11 +1742,17 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
initialize_hdmi_ih_mutes(hdmi);
+ hdmi->n = hdmi_notifier_get(dev);
+ if (!hdmi->n) {
+ ret = -ENOMEM;
+ goto err_iahb;
+ }
+
ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
dw_hdmi_irq, IRQF_SHARED,
dev_name(dev), hdmi);
if (ret)
- goto err_iahb;
+ goto err_hdmi_not;
/*
* To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
@@ -1788,6 +1804,8 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
return 0;
+err_hdmi_not:
+ hdmi_notifier_put(hdmi->n);
err_iahb:
clk_disable_unprepare(hdmi->iahb_clk);
err_isfr:
@@ -1804,6 +1822,11 @@ void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
if (hdmi->audio && !IS_ERR(hdmi->audio))
platform_device_unregister(hdmi->audio);
+ hdmi_notifier_put(hdmi->n);
+
+ if (!IS_ERR(hdmi->cec))
+ platform_device_unregister(hdmi->cec);
+
/* Disable all interrupts */
hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
--
2.8.1
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