From: Hans Verkuil <hans.verk...@cisco.com>
Implement the HPD notifier support to allow CEC drivers to
be informed when there is a new EDID and when a connect or
disconnect happens.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Tested-by: Marek Szyprowski <m.szyprow...@samsung.com>
---
drivers/gpu/drm/exynos/Kconfig | 1 +
drivers/gpu/drm/exynos/exynos_hdmi.c | 23 ++++++++++++++++++++---
2 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index d706ca4e2f02..50309409d450 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -77,6 +77,7 @@ config DRM_EXYNOS_DP
config DRM_EXYNOS_HDMI
bool "HDMI"
depends on DRM_EXYNOS_MIXER || DRM_EXYNOS5433_DECON
+ select HPD_NOTIFIER
help
Choose this option if you want to use Exynos HDMI for DRM.
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c
b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 5ed8b1effe71..8d48a0a21565 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -31,6 +31,7 @@
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
+#include <linux/hpd-notifier.h>
#include <linux/regulator/consumer.h>
#include <linux/io.h>
#include <linux/of_address.h>
@@ -118,6 +119,7 @@ struct hdmi_context {
bool dvi_mode;
struct delayed_work hotplug_work;
struct drm_display_mode current_mode;
+ struct hpd_notifier *notifier;
const struct hdmi_driver_data *drv_data;
void __iomem *regs;
@@ -807,9 +809,12 @@ static enum drm_connector_status hdmi_detect(struct
drm_connector *connector,
{
struct hdmi_context *hdata = connector_to_hdmi(connector);
- if (gpiod_get_value(hdata->hpd_gpio))
+ if (gpiod_get_value(hdata->hpd_gpio)) {
+ hpd_event_connect(hdata->notifier);
return connector_status_connected;
+ }
+ hpd_event_disconnect(hdata->notifier);
return connector_status_disconnected;
}
@@ -848,6 +853,8 @@ static int hdmi_get_modes(struct drm_connector *connector)
edid->width_cm, edid->height_cm);
drm_mode_connector_update_edid_property(connector, edid);
+ hpd_event_new_edid(hdata->notifier, edid,
+ EDID_LENGTH * (1 + edid->extensions));
ret = drm_add_edid_modes(connector, edid);
@@ -1483,6 +1490,7 @@ static void hdmi_disable(struct drm_encoder *encoder)
if (funcs && funcs->disable)
(*funcs->disable)(crtc);
+ hpd_event_disconnect(hdata->notifier);
cancel_delayed_work(&hdata->hotplug_work);
hdmiphy_disable(hdata);
@@ -1832,15 +1840,22 @@ static int hdmi_probe(struct platform_device *pdev)
}
}
+ hdata->notifier = hpd_notifier_get(&pdev->dev);
+ if (hdata->notifier == NULL) {
+ ret = -ENOMEM;
+ goto err_hdmiphy;
+ }
+
pm_runtime_enable(dev);
ret = component_add(&pdev->dev, &hdmi_component_ops);
if (ret)
- goto err_disable_pm_runtime;
+ goto err_notifier_put;
return ret;
-err_disable_pm_runtime:
+err_notifier_put:
+ hpd_notifier_put(hdata->notifier);
pm_runtime_disable(dev);
err_hdmiphy:
@@ -1859,9 +1874,11 @@ static int hdmi_remove(struct platform_device *pdev)
struct hdmi_context *hdata = platform_get_drvdata(pdev);
cancel_delayed_work_sync(&hdata->hotplug_work);
+ hpd_event_disconnect(hdata->notifier);
component_del(&pdev->dev, &hdmi_component_ops);
+ hpd_notifier_put(hdata->notifier);
pm_runtime_disable(&pdev->dev);
if (!IS_ERR(hdata->reg_hdmi_en))
--
2.11.0
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