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: Benjamin Gaignard benjamin.gaignard@linaro.org
--- version 2: - use HPD notifier instead of HDMI notifier --- drivers/gpu/drm/sti/Kconfig | 1 + drivers/gpu/drm/sti/sti_hdmi.c | 14 ++++++++++++++ drivers/gpu/drm/sti/sti_hdmi.h | 3 +++ 3 files changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/sti/Kconfig b/drivers/gpu/drm/sti/Kconfig index acd7286..f5c9572 100644 --- a/drivers/gpu/drm/sti/Kconfig +++ b/drivers/gpu/drm/sti/Kconfig @@ -8,5 +8,6 @@ config DRM_STI select DRM_PANEL select FW_LOADER select SND_SOC_HDMI_CODEC if SND_SOC + select HPD_NOTIFIER help Choose this option to enable DRM on STM stiH4xx chipset diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c index 376b076..d32a383 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -786,6 +786,8 @@ static void sti_hdmi_disable(struct drm_bridge *bridge) clk_disable_unprepare(hdmi->clk_pix);
hdmi->enabled = false; + + hpd_event_disconnect(hdmi->notifier); }
static void sti_hdmi_pre_enable(struct drm_bridge *bridge) @@ -892,6 +894,9 @@ static int sti_hdmi_connector_get_modes(struct drm_connector *connector) if (!edid) goto fail;
+ hpd_event_new_edid(hdmi->notifier, edid, + EDID_LENGTH * (edid->extensions + 1)); + count = drm_add_edid_modes(connector, edid); drm_mode_connector_update_edid_property(connector, edid); drm_edid_to_eld(connector, edid); @@ -949,10 +954,12 @@ struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
if (hdmi->hpd) { DRM_DEBUG_DRIVER("hdmi cable connected\n"); + hpd_event_connect(hdmi->notifier); return connector_status_connected; }
DRM_DEBUG_DRIVER("hdmi cable disconnected\n"); + hpd_event_disconnect(hdmi->notifier); return connector_status_disconnected; }
@@ -1464,6 +1471,10 @@ static int sti_hdmi_probe(struct platform_device *pdev) goto release_adapter; }
+ hdmi->notifier = hpd_notifier_get(&pdev->dev); + if (!hdmi->notifier) + goto release_adapter; + hdmi->reset = devm_reset_control_get(dev, "hdmi"); /* Take hdmi out of reset */ if (!IS_ERR(hdmi->reset)) @@ -1483,11 +1494,14 @@ static int sti_hdmi_remove(struct platform_device *pdev) { struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
+ hpd_event_disconnect(hdmi->notifier); + i2c_put_adapter(hdmi->ddc_adapt); if (hdmi->audio_pdev) platform_device_unregister(hdmi->audio_pdev); component_del(&pdev->dev, &sti_hdmi_ops);
+ hpd_notifier_put(hdmi->notifier); return 0; }
diff --git a/drivers/gpu/drm/sti/sti_hdmi.h b/drivers/gpu/drm/sti/sti_hdmi.h index 119bc35..2109c97 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.h +++ b/drivers/gpu/drm/sti/sti_hdmi.h @@ -8,6 +8,7 @@ #define _STI_HDMI_H_
#include <linux/hdmi.h> +#include <linux/hpd-notifier.h> #include <linux/platform_device.h>
#include <drm/drmP.h> @@ -77,6 +78,7 @@ enum sti_hdmi_modes { * @audio_pdev: ASoC hdmi-codec platform device * @audio: hdmi audio parameters. * @drm_connector: hdmi connector + * @notifier: hotplug detect notifier */ struct sti_hdmi { struct device dev; @@ -102,6 +104,7 @@ struct sti_hdmi { struct platform_device *audio_pdev; struct hdmi_audio_params audio; struct drm_connector *drm_connector; + struct hpd_notifier *notifier; };
u32 hdmi_read(struct sti_hdmi *hdmi, int offset);