@@ -449,6 +449,14 @@ static int dp_display_usbpd_configure_cb(struct device *dev)
return dp_display_process_hpd_high(dp);
}
+void dp_display_oob_hotplug_event(struct msm_dp *dp_display,
+ enum drm_connector_hpd_state hpd_state)
+{
+ struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+ dp->usbpd->oob_event(dp->usbpd, hpd_state);
+}
+
static int dp_display_usbpd_disconnect_cb(struct device *dev)
{
struct dp_display_private *dp = dev_get_dp_display_private(dev);
@@ -1296,6 +1304,7 @@ static int dp_display_probe(struct platform_device *pdev)
dp->pdev = pdev;
dp->name = "drm_dp";
dp->dp_display.connector_type = desc->connector_type;
+ dp->dp_display.dev = &pdev->dev;
rc = dp_init_sub_modules(dp);
if (rc) {
@@ -11,6 +11,7 @@
#include "disp/msm_disp_snapshot.h"
struct msm_dp {
+ struct device *dev;
struct drm_device *drm_dev;
struct device *codec_dev;
struct drm_bridge *bridge;
@@ -40,5 +41,7 @@ bool dp_display_check_video_test(struct msm_dp *dp_display);
int dp_display_get_test_bpp(struct msm_dp *dp_display);
void dp_display_signal_audio_start(struct msm_dp *dp_display);
void dp_display_signal_audio_complete(struct msm_dp *dp_display);
+void dp_display_oob_hotplug_event(struct msm_dp *dp_display,
+ enum drm_connector_hpd_state hpd_state);
#endif /* _DP_DISPLAY_H_ */
@@ -123,6 +123,14 @@ static enum drm_mode_status dp_connector_mode_valid(
return dp_display_validate_mode(dp_disp, mode->clock);
}
+static void dp_oob_hotplug_event(struct drm_connector *connector,
+ enum drm_connector_hpd_state hpd_state)
+{
+ struct msm_dp *dp_disp = to_dp_connector(connector)->dp_display;
+
+ dp_display_oob_hotplug_event(dp_disp, hpd_state);
+}
+
static const struct drm_connector_funcs dp_connector_funcs = {
.detect = dp_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
@@ -130,6 +138,7 @@ static const struct drm_connector_funcs dp_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+ .oob_hotplug_event = dp_oob_hotplug_event,
};
static const struct drm_connector_helper_funcs dp_connector_helper_funcs = {
@@ -160,6 +169,8 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
if (ret)
return ERR_PTR(ret);
+ connector->fwnode = fwnode_handle_get(dev_fwnode(dp_display->dev));
+
drm_connector_helper_add(connector, &dp_connector_helper_funcs);
/*
@@ -7,6 +7,8 @@
#include <linux/slab.h>
#include <linux/device.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_print.h>
#include "dp_hpd.h"
@@ -45,6 +47,24 @@ int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd)
return rc;
}
+static void dp_hpd_oob_event(struct dp_usbpd *dp_usbpd,
+ enum drm_connector_hpd_state hpd_state)
+{
+ struct dp_hpd_private *hpd_priv = container_of(dp_usbpd, struct dp_hpd_private, dp_usbpd);
+
+ DRM_DEBUG_DP("hpd_state: %d connected: %d\n", hpd_state, dp_usbpd->connected);
+
+ if (!dp_usbpd->connected && hpd_state == DRM_CONNECTOR_HPD_HIGH) {
+ dp_usbpd->connected = true;
+ hpd_priv->dp_cb->configure(hpd_priv->dev);
+ } else if (hpd_state == DRM_CONNECTOR_HPD_LOW) {
+ dp_usbpd->connected = false;
+ hpd_priv->dp_cb->disconnect(hpd_priv->dev);
+ } else {
+ hpd_priv->dp_cb->attention(hpd_priv->dev);
+ }
+}
+
struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb)
{
struct dp_hpd_private *dp_hpd;
@@ -62,6 +82,7 @@ struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb)
dp_hpd->dp_cb = cb;
dp_hpd->dp_usbpd.connect = dp_hpd_connect;
+ dp_hpd->dp_usbpd.oob_event = dp_hpd_oob_event;
return &dp_hpd->dp_usbpd;
}
@@ -29,7 +29,9 @@ enum plug_orientation {
* @hpd_irq: Change in the status since last message
* @alt_mode_cfg_done: bool to specify alt mode status
* @debug_en: bool to specify debug mode
+ * @connected: cable currently connected
* @connect: simulate disconnect or connect for debug mode
+ * @oob_event: deliver oob event to the usbpd code
*/
struct dp_usbpd {
enum plug_orientation orientation;
@@ -41,8 +43,11 @@ struct dp_usbpd {
bool hpd_irq;
bool alt_mode_cfg_done;
bool debug_en;
+ bool connected;
int (*connect)(struct dp_usbpd *dp_usbpd, bool hpd);
+ void (*oob_event)(struct dp_usbpd *dp_usbpd,
+ enum drm_connector_hpd_state hpd_state);
};
/**
The Qualcomm DisplayPort driver contains traces of the necessary plumbing to hook up USB HPD, in the form of the dp_hpd module and the dp_usbpd_cb struct. Use this as basis for implementing the oob_hotplug_event() callback, by amending the dp_hpd module with the missing logic. Overall the solution is similar to what's done downstream, but upstream all the code to disect the HPD notification lives on the calling side of drm_connector_oob_hotplug_event(). drm_connector_oob_hotplug_event() performs the lookup of the drm_connector based on fwnode, hence the need to assign the fwnode in dp_drm_connector_init(). Changes in v2: - Adopt enum drm_connector_hpd_state Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- drivers/gpu/drm/msm/dp/dp_display.c | 9 +++++++++ drivers/gpu/drm/msm/dp/dp_display.h | 3 +++ drivers/gpu/drm/msm/dp/dp_drm.c | 11 +++++++++++ drivers/gpu/drm/msm/dp/dp_hpd.c | 21 +++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_hpd.h | 5 +++++ 5 files changed, 49 insertions(+)