On 02.01.2017 15:19, Hans Verkuil wrote:
> 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 | 24 +++++++++++++++++++++---
> 2 files changed, 22 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
> index d706ca4..80bfd1d 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_NOTIFIERS
> 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 5ed8b1e..28bf609 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 +853,9 @@ 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_connect(hdata->notifier);
Is there a reason to call hpd_event_connect here? It was called already
from hdmi_detect.
Regards
Andrzej
> + hpd_event_new_edid(hdata->notifier, edid,
> + EDID_LENGTH * (1 + edid->extensions));
>
> ret = drm_add_edid_modes(connector, edid);
>
> @@ -1483,6 +1491,7 @@ 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 +1841,22 @@ 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 +1875,11 @@ 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))
--
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