On 01/03/2017 08:55 AM, Andrzej Hajda wrote:
> On 02.01.2017 15:19, Hans Verkuil wrote:
>> From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>>
>> 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.verkuil@xxxxxxxxx>
>> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
>> ---
>> 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.
True. Will drop this.
Hans
>
> 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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