USB altmodes code would send OOB notifications to the drm_connector
specified in the device tree. However as the MSM DP driver uses
drm_bridge_connector, there is no way to receive these event directly.
Implement a bridge between oob_hotplug_event and drm_bridge's hpd_notify
and use it to deliver altmode messages to the MSM DP driver.
Note, I left the original 'bool connected' field to be used by the
notifiers. However I think that it should be replaced in favour of using
the dp->hpd_state properly.
Bjorn Andersson (2):
drm: Add HPD state to drm_connector_oob_hotplug_event()
drm/msm/dp: Implement hpd_notify()
Dmitry Baryshkov (3):
drm/bridge_connector: stop filtering events in
drm_bridge_connector_hpd_cb()
drm/bridge_connector: implement oob_hotplug_event
drm/msm/dp: remove most of usbpd-related remains
drivers/gpu/drm/drm_bridge_connector.c | 17 +++--
drivers/gpu/drm/drm_connector.c | 6 +-
drivers/gpu/drm/i915/display/intel_dp.c | 17 ++++-
drivers/gpu/drm/i915/i915_drv.h | 3 +
drivers/gpu/drm/msm/Makefile | 1 -
drivers/gpu/drm/msm/dp/dp_ctrl.h | 1 -
drivers/gpu/drm/msm/dp/dp_debug.c | 6 +-
drivers/gpu/drm/msm/dp/dp_debug.h | 4 +-
drivers/gpu/drm/msm/dp/dp_display.c | 81 +++++++++++-------------
drivers/gpu/drm/msm/dp/dp_display.h | 1 +
drivers/gpu/drm/msm/dp/dp_drm.c | 3 +
drivers/gpu/drm/msm/dp/dp_drm.h | 2 +
drivers/gpu/drm/msm/dp/dp_hpd.c | 67 --------------------
drivers/gpu/drm/msm/dp/dp_hpd.h | 78 -----------------------
drivers/gpu/drm/msm/dp/dp_panel.h | 1 -
drivers/gpu/drm/msm/dp/dp_power.c | 2 +-
drivers/gpu/drm/msm/dp/dp_power.h | 3 +-
drivers/usb/typec/altmodes/displayport.c | 10 +--
include/drm/drm_connector.h | 6 +-
19 files changed, 88 insertions(+), 221 deletions(-)
delete mode 100644 drivers/gpu/drm/msm/dp/dp_hpd.c
delete mode 100644 drivers/gpu/drm/msm/dp/dp_hpd.h
--
2.35.1
In some implementations, such as the Qualcomm platforms, the display
driver has no way to query the current HPD state and as such it's
impossible to distinguish between disconnect and attention events.
Add a parameter to drm_connector_oob_hotplug_event() to pass the HPD
state.
Also push the test for unchanged state in the displayport altmode driver
into the i915 driver, to allow other drivers to act upon each update.
Signed-off-by: Bjorn Andersson <[email protected]>
---
Changes since v3:
- Transition to drm_connector_status instead of custom hpd_state
drivers/gpu/drm/drm_connector.c | 6 ++++--
drivers/gpu/drm/i915/display/intel_dp.c | 17 ++++++++++++++---
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/usb/typec/altmodes/displayport.c | 10 +++-------
include/drm/drm_connector.h | 6 ++++--
5 files changed, 28 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 1c48d162c77e..e86c69f0640f 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2794,6 +2794,7 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
/**
* drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
* @connector_fwnode: fwnode_handle to report the event on
+ * @status: hot plug detect logical state
*
* On some hardware a hotplug event notification may come from outside the display
* driver / device. An example of this is some USB Type-C setups where the hardware
@@ -2803,7 +2804,8 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
* This function can be used to report these out-of-band events after obtaining
* a drm_connector reference through calling drm_connector_find_by_fwnode().
*/
-void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
+void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
+ enum drm_connector_status status)
{
struct drm_connector *connector;
@@ -2812,7 +2814,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
return;
if (connector->funcs->oob_hotplug_event)
- connector->funcs->oob_hotplug_event(connector);
+ connector->funcs->oob_hotplug_event(connector, status);
drm_connector_put(connector);
}
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index e4a79c11fd25..56cc023f7bbd 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4951,15 +4951,26 @@ static int intel_dp_connector_atomic_check(struct drm_connector *conn,
return intel_modeset_synced_crtcs(state, conn);
}
-static void intel_dp_oob_hotplug_event(struct drm_connector *connector)
+static void intel_dp_oob_hotplug_event(struct drm_connector *connector,
+ enum drm_connector_status hpd_state)
{
struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
struct drm_i915_private *i915 = to_i915(connector->dev);
+ bool hpd_high = hpd_state == connector_status_connected;
+ unsigned int hpd_pin = encoder->hpd_pin;
+ bool need_work = false;
spin_lock_irq(&i915->irq_lock);
- i915->hotplug.event_bits |= BIT(encoder->hpd_pin);
+ if (hpd_high != test_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state)) {
+ i915->hotplug.event_bits |= BIT(hpd_pin);
+
+ __assign_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state, hpd_high);
+ need_work = true;
+ }
spin_unlock_irq(&i915->irq_lock);
- queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
+
+ if (need_work)
+ queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
}
static const struct drm_connector_funcs intel_dp_connector_funcs = {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 24111bf42ce0..96c088bb5522 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -135,6 +135,9 @@ struct i915_hotplug {
/* Whether or not to count short HPD IRQs in HPD storms */
u8 hpd_short_storm_enabled;
+ /* Last state reported by oob_hotplug_event for each encoder */
+ unsigned long oob_hotplug_last_state;
+
/*
* if we get a HPD irq from DP and a HPD irq from non-DP
* the non-DP HPD could block the workqueue on a mode config
diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
index c1d8c23baa39..9360ca177c7d 100644
--- a/drivers/usb/typec/altmodes/displayport.c
+++ b/drivers/usb/typec/altmodes/displayport.c
@@ -59,7 +59,6 @@ struct dp_altmode {
struct typec_displayport_data data;
enum dp_state state;
- bool hpd;
struct mutex lock; /* device lock */
struct work_struct work;
@@ -143,10 +142,8 @@ static int dp_altmode_status_update(struct dp_altmode *dp)
if (!ret)
dp->state = DP_STATE_CONFIGURE;
} else {
- if (dp->hpd != hpd) {
- drm_connector_oob_hotplug_event(dp->connector_fwnode);
- dp->hpd = hpd;
- }
+ drm_connector_oob_hotplug_event(dp->connector_fwnode,
+ hpd ? connector_status_connected : connector_status_disconnected);
}
return ret;
@@ -573,8 +570,7 @@ void dp_altmode_remove(struct typec_altmode *alt)
cancel_work_sync(&dp->work);
if (dp->connector_fwnode) {
- if (dp->hpd)
- drm_connector_oob_hotplug_event(dp->connector_fwnode);
+ drm_connector_oob_hotplug_event(dp->connector_fwnode, connector_status_disconnected);
fwnode_handle_put(dp->connector_fwnode);
}
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 3ac4bf87f257..886aa1861ed9 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1141,7 +1141,8 @@ struct drm_connector_funcs {
* This will get called when a hotplug-event for a drm-connector
* has been received from a source outside the display driver / device.
*/
- void (*oob_hotplug_event)(struct drm_connector *connector);
+ void (*oob_hotplug_event)(struct drm_connector *connector,
+ enum drm_connector_status status);
/**
* @debugfs_init:
@@ -1749,7 +1750,8 @@ drm_connector_is_unregistered(struct drm_connector *connector)
DRM_CONNECTOR_UNREGISTERED;
}
-void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode);
+void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
+ enum drm_connector_status status);
const char *drm_get_connector_type_name(unsigned int connector_type);
const char *drm_get_connector_status_name(enum drm_connector_status status);
const char *drm_get_subpixel_order_name(enum subpixel_order order);
--
2.35.1
From: Dmitry Baryshkov <[email protected]>
Implement the oob_hotplug_event() callback. Translate it to the HPD
notification sent to the HPD bridge in the chain.
Signed-off-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
---
Changes since v3:
- New patch
drivers/gpu/drm/drm_bridge_connector.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
index 0f6f3f653f65..6a0a6b14360a 100644
--- a/drivers/gpu/drm/drm_bridge_connector.c
+++ b/drivers/gpu/drm/drm_bridge_connector.c
@@ -123,6 +123,17 @@ static void drm_bridge_connector_hpd_cb(void *cb_data,
drm_kms_helper_hotplug_event(dev);
}
+static void drm_bridge_connector_oob_hotplug_event(struct drm_connector *connector,
+ enum drm_connector_status status)
+{
+ struct drm_bridge_connector *bridge_connector =
+ to_drm_bridge_connector(connector);
+ struct drm_bridge *hpd = bridge_connector->bridge_hpd;
+
+ if (hpd)
+ drm_bridge_hpd_notify(hpd, status);
+}
+
/**
* drm_bridge_connector_enable_hpd - Enable hot-plug detection for the connector
* @connector: The DRM bridge connector
@@ -233,6 +244,7 @@ static const struct drm_connector_funcs drm_bridge_connector_funcs = {
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.debugfs_init = drm_bridge_connector_debugfs_init,
+ .oob_hotplug_event = drm_bridge_connector_oob_hotplug_event,
};
/* -----------------------------------------------------------------------------
--
2.35.1
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
hpd_notify() 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().
Signed-off-by: Bjorn Andersson <[email protected]>
---
Changes since v3:
- Implements hpd_notify instead of oob_hotplug_event
- Rebased on new cleanup patch from Dmitry
- Set hpd_state to ST_MAINLINK_READY when dp_display_usbpd_configure() succeeds
drivers/gpu/drm/msm/dp/dp_display.c | 26 ++++++++++++++++++++++++++
drivers/gpu/drm/msm/dp/dp_display.h | 1 +
drivers/gpu/drm/msm/dp/dp_drm.c | 3 +++
drivers/gpu/drm/msm/dp/dp_drm.h | 2 ++
4 files changed, 32 insertions(+)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index b447446d75e9..080294ac6144 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -83,6 +83,8 @@ struct dp_display_private {
bool hpd_irq_on;
bool audio_supported;
+ bool connected;
+
struct drm_device *drm_dev;
struct platform_device *pdev;
struct dentry *root;
@@ -1271,6 +1273,7 @@ static int dp_display_probe(struct platform_device *pdev)
if (!desc)
return -EINVAL;
+ dp->dp_display.dev = &pdev->dev;
dp->pdev = pdev;
dp->name = "drm_dp";
dp->dp_display.connector_type = desc->connector_type;
@@ -1760,3 +1763,26 @@ void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
dp_display->dp_mode.h_active_low =
!!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
}
+
+void dp_bridge_hpd_notify(struct drm_bridge *bridge,
+ enum drm_connector_status status)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
+ struct msm_dp *dp = dp_bridge->dp_display;
+ struct dp_display_private *dp_display = container_of(dp, struct dp_display_private, dp_display);
+ int ret;
+
+ drm_dbg_dp(dp_display->drm_dev, "status: %d connected: %d\n", status, dp_display->connected);
+
+ if (!dp_display->connected && status == connector_status_connected) {
+ dp_display->connected = true;
+ ret = dp_display_usbpd_configure(dp_display);
+ if (!ret)
+ dp_display->hpd_state = ST_MAINLINK_READY;
+ } else if (status != connector_status_connected) {
+ dp_display->connected = false;
+ dp_display_notify_disconnect(dp_display);
+ } else {
+ dp_display_usbpd_attention(dp_display);
+ }
+}
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 4f9fe4d7610b..2d2614bc5a14 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -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;
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 62d58b9c4647..821cfd37b1fb 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -68,6 +68,7 @@ static const struct drm_bridge_funcs dp_bridge_ops = {
.mode_valid = dp_bridge_mode_valid,
.get_modes = dp_bridge_get_modes,
.detect = dp_bridge_detect,
+ .hpd_notify = dp_bridge_hpd_notify,
};
struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
@@ -138,6 +139,8 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
if (IS_ERR(connector))
return connector;
+ connector->fwnode = fwnode_handle_get(dev_fwnode(dp_display->dev));
+
drm_connector_attach_encoder(connector, dp_display->encoder);
return connector;
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h
index f4b1ed1e24f7..3b7480a86844 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.h
+++ b/drivers/gpu/drm/msm/dp/dp_drm.h
@@ -32,5 +32,7 @@ enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
const struct drm_display_mode *mode,
const struct drm_display_mode *adjusted_mode);
+void dp_bridge_hpd_notify(struct drm_bridge *bridge,
+ enum drm_connector_status status);
#endif /* _DP_DRM_H_ */
--
2.35.1
+Hans
Hans, do you have any comments?
On Mon, May 02, 2022 at 09:53:13AM -0700, Bjorn Andersson wrote:
> In some implementations, such as the Qualcomm platforms, the display
> driver has no way to query the current HPD state and as such it's
> impossible to distinguish between disconnect and attention events.
>
> Add a parameter to drm_connector_oob_hotplug_event() to pass the HPD
> state.
>
> Also push the test for unchanged state in the displayport altmode driver
> into the i915 driver, to allow other drivers to act upon each update.
>
> Signed-off-by: Bjorn Andersson <[email protected]>
> ---
>
> Changes since v3:
> - Transition to drm_connector_status instead of custom hpd_state
>
> drivers/gpu/drm/drm_connector.c | 6 ++++--
> drivers/gpu/drm/i915/display/intel_dp.c | 17 ++++++++++++++---
> drivers/gpu/drm/i915/i915_drv.h | 3 +++
> drivers/usb/typec/altmodes/displayport.c | 10 +++-------
> include/drm/drm_connector.h | 6 ++++--
> 5 files changed, 28 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 1c48d162c77e..e86c69f0640f 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -2794,6 +2794,7 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
> /**
> * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
> * @connector_fwnode: fwnode_handle to report the event on
> + * @status: hot plug detect logical state
> *
> * On some hardware a hotplug event notification may come from outside the display
> * driver / device. An example of this is some USB Type-C setups where the hardware
> @@ -2803,7 +2804,8 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
> * This function can be used to report these out-of-band events after obtaining
> * a drm_connector reference through calling drm_connector_find_by_fwnode().
> */
> -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
> +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
> + enum drm_connector_status status)
> {
> struct drm_connector *connector;
>
> @@ -2812,7 +2814,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
> return;
>
> if (connector->funcs->oob_hotplug_event)
> - connector->funcs->oob_hotplug_event(connector);
> + connector->funcs->oob_hotplug_event(connector, status);
>
> drm_connector_put(connector);
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index e4a79c11fd25..56cc023f7bbd 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4951,15 +4951,26 @@ static int intel_dp_connector_atomic_check(struct drm_connector *conn,
> return intel_modeset_synced_crtcs(state, conn);
> }
>
> -static void intel_dp_oob_hotplug_event(struct drm_connector *connector)
> +static void intel_dp_oob_hotplug_event(struct drm_connector *connector,
> + enum drm_connector_status hpd_state)
> {
> struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
> struct drm_i915_private *i915 = to_i915(connector->dev);
> + bool hpd_high = hpd_state == connector_status_connected;
> + unsigned int hpd_pin = encoder->hpd_pin;
> + bool need_work = false;
>
> spin_lock_irq(&i915->irq_lock);
> - i915->hotplug.event_bits |= BIT(encoder->hpd_pin);
> + if (hpd_high != test_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state)) {
> + i915->hotplug.event_bits |= BIT(hpd_pin);
> +
> + __assign_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state, hpd_high);
> + need_work = true;
> + }
> spin_unlock_irq(&i915->irq_lock);
> - queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
> +
> + if (need_work)
> + queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
> }
>
> static const struct drm_connector_funcs intel_dp_connector_funcs = {
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 24111bf42ce0..96c088bb5522 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -135,6 +135,9 @@ struct i915_hotplug {
> /* Whether or not to count short HPD IRQs in HPD storms */
> u8 hpd_short_storm_enabled;
>
> + /* Last state reported by oob_hotplug_event for each encoder */
> + unsigned long oob_hotplug_last_state;
> +
> /*
> * if we get a HPD irq from DP and a HPD irq from non-DP
> * the non-DP HPD could block the workqueue on a mode config
> diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
> index c1d8c23baa39..9360ca177c7d 100644
> --- a/drivers/usb/typec/altmodes/displayport.c
> +++ b/drivers/usb/typec/altmodes/displayport.c
> @@ -59,7 +59,6 @@ struct dp_altmode {
> struct typec_displayport_data data;
>
> enum dp_state state;
> - bool hpd;
>
> struct mutex lock; /* device lock */
> struct work_struct work;
> @@ -143,10 +142,8 @@ static int dp_altmode_status_update(struct dp_altmode *dp)
> if (!ret)
> dp->state = DP_STATE_CONFIGURE;
> } else {
> - if (dp->hpd != hpd) {
> - drm_connector_oob_hotplug_event(dp->connector_fwnode);
> - dp->hpd = hpd;
> - }
> + drm_connector_oob_hotplug_event(dp->connector_fwnode,
> + hpd ? connector_status_connected : connector_status_disconnected);
> }
>
> return ret;
> @@ -573,8 +570,7 @@ void dp_altmode_remove(struct typec_altmode *alt)
> cancel_work_sync(&dp->work);
>
> if (dp->connector_fwnode) {
> - if (dp->hpd)
> - drm_connector_oob_hotplug_event(dp->connector_fwnode);
> + drm_connector_oob_hotplug_event(dp->connector_fwnode, connector_status_disconnected);
>
> fwnode_handle_put(dp->connector_fwnode);
> }
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 3ac4bf87f257..886aa1861ed9 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1141,7 +1141,8 @@ struct drm_connector_funcs {
> * This will get called when a hotplug-event for a drm-connector
> * has been received from a source outside the display driver / device.
> */
> - void (*oob_hotplug_event)(struct drm_connector *connector);
> + void (*oob_hotplug_event)(struct drm_connector *connector,
> + enum drm_connector_status status);
>
> /**
> * @debugfs_init:
> @@ -1749,7 +1750,8 @@ drm_connector_is_unregistered(struct drm_connector *connector)
> DRM_CONNECTOR_UNREGISTERED;
> }
>
> -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode);
> +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
> + enum drm_connector_status status);
> const char *drm_get_connector_type_name(unsigned int connector_type);
> const char *drm_get_connector_status_name(enum drm_connector_status status);
> const char *drm_get_subpixel_order_name(enum subpixel_order order);
> --
> 2.35.1
--
heikki
Hi,
On 5/16/22 13:25, Heikki Krogerus wrote:
> +Hans
>
> Hans, do you have any comments?
Thanks for the ping, this looks good to me:
Reviewed-by: Hans de Goede <[email protected]>
Regards,
Hans
>
> On Mon, May 02, 2022 at 09:53:13AM -0700, Bjorn Andersson wrote:
>> In some implementations, such as the Qualcomm platforms, the display
>> driver has no way to query the current HPD state and as such it's
>> impossible to distinguish between disconnect and attention events.
>>
>> Add a parameter to drm_connector_oob_hotplug_event() to pass the HPD
>> state.
>>
>> Also push the test for unchanged state in the displayport altmode driver
>> into the i915 driver, to allow other drivers to act upon each update.
>>
>> Signed-off-by: Bjorn Andersson <[email protected]>
>> ---
>>
>> Changes since v3:
>> - Transition to drm_connector_status instead of custom hpd_state
>>
>> drivers/gpu/drm/drm_connector.c | 6 ++++--
>> drivers/gpu/drm/i915/display/intel_dp.c | 17 ++++++++++++++---
>> drivers/gpu/drm/i915/i915_drv.h | 3 +++
>> drivers/usb/typec/altmodes/displayport.c | 10 +++-------
>> include/drm/drm_connector.h | 6 ++++--
>> 5 files changed, 28 insertions(+), 14 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
>> index 1c48d162c77e..e86c69f0640f 100644
>> --- a/drivers/gpu/drm/drm_connector.c
>> +++ b/drivers/gpu/drm/drm_connector.c
>> @@ -2794,6 +2794,7 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
>> /**
>> * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
>> * @connector_fwnode: fwnode_handle to report the event on
>> + * @status: hot plug detect logical state
>> *
>> * On some hardware a hotplug event notification may come from outside the display
>> * driver / device. An example of this is some USB Type-C setups where the hardware
>> @@ -2803,7 +2804,8 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
>> * This function can be used to report these out-of-band events after obtaining
>> * a drm_connector reference through calling drm_connector_find_by_fwnode().
>> */
>> -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
>> +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
>> + enum drm_connector_status status)
>> {
>> struct drm_connector *connector;
>>
>> @@ -2812,7 +2814,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
>> return;
>>
>> if (connector->funcs->oob_hotplug_event)
>> - connector->funcs->oob_hotplug_event(connector);
>> + connector->funcs->oob_hotplug_event(connector, status);
>>
>> drm_connector_put(connector);
>> }
>> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
>> index e4a79c11fd25..56cc023f7bbd 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>> @@ -4951,15 +4951,26 @@ static int intel_dp_connector_atomic_check(struct drm_connector *conn,
>> return intel_modeset_synced_crtcs(state, conn);
>> }
>>
>> -static void intel_dp_oob_hotplug_event(struct drm_connector *connector)
>> +static void intel_dp_oob_hotplug_event(struct drm_connector *connector,
>> + enum drm_connector_status hpd_state)
>> {
>> struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
>> struct drm_i915_private *i915 = to_i915(connector->dev);
>> + bool hpd_high = hpd_state == connector_status_connected;
>> + unsigned int hpd_pin = encoder->hpd_pin;
>> + bool need_work = false;
>>
>> spin_lock_irq(&i915->irq_lock);
>> - i915->hotplug.event_bits |= BIT(encoder->hpd_pin);
>> + if (hpd_high != test_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state)) {
>> + i915->hotplug.event_bits |= BIT(hpd_pin);
>> +
>> + __assign_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state, hpd_high);
>> + need_work = true;
>> + }
>> spin_unlock_irq(&i915->irq_lock);
>> - queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
>> +
>> + if (need_work)
>> + queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
>> }
>>
>> static const struct drm_connector_funcs intel_dp_connector_funcs = {
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>> index 24111bf42ce0..96c088bb5522 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -135,6 +135,9 @@ struct i915_hotplug {
>> /* Whether or not to count short HPD IRQs in HPD storms */
>> u8 hpd_short_storm_enabled;
>>
>> + /* Last state reported by oob_hotplug_event for each encoder */
>> + unsigned long oob_hotplug_last_state;
>> +
>> /*
>> * if we get a HPD irq from DP and a HPD irq from non-DP
>> * the non-DP HPD could block the workqueue on a mode config
>> diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
>> index c1d8c23baa39..9360ca177c7d 100644
>> --- a/drivers/usb/typec/altmodes/displayport.c
>> +++ b/drivers/usb/typec/altmodes/displayport.c
>> @@ -59,7 +59,6 @@ struct dp_altmode {
>> struct typec_displayport_data data;
>>
>> enum dp_state state;
>> - bool hpd;
>>
>> struct mutex lock; /* device lock */
>> struct work_struct work;
>> @@ -143,10 +142,8 @@ static int dp_altmode_status_update(struct dp_altmode *dp)
>> if (!ret)
>> dp->state = DP_STATE_CONFIGURE;
>> } else {
>> - if (dp->hpd != hpd) {
>> - drm_connector_oob_hotplug_event(dp->connector_fwnode);
>> - dp->hpd = hpd;
>> - }
>> + drm_connector_oob_hotplug_event(dp->connector_fwnode,
>> + hpd ? connector_status_connected : connector_status_disconnected);
>> }
>>
>> return ret;
>> @@ -573,8 +570,7 @@ void dp_altmode_remove(struct typec_altmode *alt)
>> cancel_work_sync(&dp->work);
>>
>> if (dp->connector_fwnode) {
>> - if (dp->hpd)
>> - drm_connector_oob_hotplug_event(dp->connector_fwnode);
>> + drm_connector_oob_hotplug_event(dp->connector_fwnode, connector_status_disconnected);
>>
>> fwnode_handle_put(dp->connector_fwnode);
>> }
>> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
>> index 3ac4bf87f257..886aa1861ed9 100644
>> --- a/include/drm/drm_connector.h
>> +++ b/include/drm/drm_connector.h
>> @@ -1141,7 +1141,8 @@ struct drm_connector_funcs {
>> * This will get called when a hotplug-event for a drm-connector
>> * has been received from a source outside the display driver / device.
>> */
>> - void (*oob_hotplug_event)(struct drm_connector *connector);
>> + void (*oob_hotplug_event)(struct drm_connector *connector,
>> + enum drm_connector_status status);
>>
>> /**
>> * @debugfs_init:
>> @@ -1749,7 +1750,8 @@ drm_connector_is_unregistered(struct drm_connector *connector)
>> DRM_CONNECTOR_UNREGISTERED;
>> }
>>
>> -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode);
>> +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
>> + enum drm_connector_status status);
>> const char *drm_get_connector_type_name(unsigned int connector_type);
>> const char *drm_get_connector_status_name(enum drm_connector_status status);
>> const char *drm_get_subpixel_order_name(enum subpixel_order order);
>> --
>> 2.35.1
>
On Mon, May 02, 2022 at 09:53:13AM -0700, Bjorn Andersson wrote:
> In some implementations, such as the Qualcomm platforms, the display
> driver has no way to query the current HPD state and as such it's
> impossible to distinguish between disconnect and attention events.
>
> Add a parameter to drm_connector_oob_hotplug_event() to pass the HPD
> state.
>
> Also push the test for unchanged state in the displayport altmode driver
> into the i915 driver, to allow other drivers to act upon each update.
>
> Signed-off-by: Bjorn Andersson <[email protected]>
Acked-by: Heikki Krogerus <[email protected]>
> ---
>
> Changes since v3:
> - Transition to drm_connector_status instead of custom hpd_state
>
> drivers/gpu/drm/drm_connector.c | 6 ++++--
> drivers/gpu/drm/i915/display/intel_dp.c | 17 ++++++++++++++---
> drivers/gpu/drm/i915/i915_drv.h | 3 +++
> drivers/usb/typec/altmodes/displayport.c | 10 +++-------
> include/drm/drm_connector.h | 6 ++++--
> 5 files changed, 28 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 1c48d162c77e..e86c69f0640f 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -2794,6 +2794,7 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
> /**
> * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
> * @connector_fwnode: fwnode_handle to report the event on
> + * @status: hot plug detect logical state
> *
> * On some hardware a hotplug event notification may come from outside the display
> * driver / device. An example of this is some USB Type-C setups where the hardware
> @@ -2803,7 +2804,8 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
> * This function can be used to report these out-of-band events after obtaining
> * a drm_connector reference through calling drm_connector_find_by_fwnode().
> */
> -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
> +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
> + enum drm_connector_status status)
> {
> struct drm_connector *connector;
>
> @@ -2812,7 +2814,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
> return;
>
> if (connector->funcs->oob_hotplug_event)
> - connector->funcs->oob_hotplug_event(connector);
> + connector->funcs->oob_hotplug_event(connector, status);
>
> drm_connector_put(connector);
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index e4a79c11fd25..56cc023f7bbd 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4951,15 +4951,26 @@ static int intel_dp_connector_atomic_check(struct drm_connector *conn,
> return intel_modeset_synced_crtcs(state, conn);
> }
>
> -static void intel_dp_oob_hotplug_event(struct drm_connector *connector)
> +static void intel_dp_oob_hotplug_event(struct drm_connector *connector,
> + enum drm_connector_status hpd_state)
> {
> struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
> struct drm_i915_private *i915 = to_i915(connector->dev);
> + bool hpd_high = hpd_state == connector_status_connected;
> + unsigned int hpd_pin = encoder->hpd_pin;
> + bool need_work = false;
>
> spin_lock_irq(&i915->irq_lock);
> - i915->hotplug.event_bits |= BIT(encoder->hpd_pin);
> + if (hpd_high != test_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state)) {
> + i915->hotplug.event_bits |= BIT(hpd_pin);
> +
> + __assign_bit(hpd_pin, &i915->hotplug.oob_hotplug_last_state, hpd_high);
> + need_work = true;
> + }
> spin_unlock_irq(&i915->irq_lock);
> - queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
> +
> + if (need_work)
> + queue_delayed_work(system_wq, &i915->hotplug.hotplug_work, 0);
> }
>
> static const struct drm_connector_funcs intel_dp_connector_funcs = {
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 24111bf42ce0..96c088bb5522 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -135,6 +135,9 @@ struct i915_hotplug {
> /* Whether or not to count short HPD IRQs in HPD storms */
> u8 hpd_short_storm_enabled;
>
> + /* Last state reported by oob_hotplug_event for each encoder */
> + unsigned long oob_hotplug_last_state;
> +
> /*
> * if we get a HPD irq from DP and a HPD irq from non-DP
> * the non-DP HPD could block the workqueue on a mode config
> diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
> index c1d8c23baa39..9360ca177c7d 100644
> --- a/drivers/usb/typec/altmodes/displayport.c
> +++ b/drivers/usb/typec/altmodes/displayport.c
> @@ -59,7 +59,6 @@ struct dp_altmode {
> struct typec_displayport_data data;
>
> enum dp_state state;
> - bool hpd;
>
> struct mutex lock; /* device lock */
> struct work_struct work;
> @@ -143,10 +142,8 @@ static int dp_altmode_status_update(struct dp_altmode *dp)
> if (!ret)
> dp->state = DP_STATE_CONFIGURE;
> } else {
> - if (dp->hpd != hpd) {
> - drm_connector_oob_hotplug_event(dp->connector_fwnode);
> - dp->hpd = hpd;
> - }
> + drm_connector_oob_hotplug_event(dp->connector_fwnode,
> + hpd ? connector_status_connected : connector_status_disconnected);
> }
>
> return ret;
> @@ -573,8 +570,7 @@ void dp_altmode_remove(struct typec_altmode *alt)
> cancel_work_sync(&dp->work);
>
> if (dp->connector_fwnode) {
> - if (dp->hpd)
> - drm_connector_oob_hotplug_event(dp->connector_fwnode);
> + drm_connector_oob_hotplug_event(dp->connector_fwnode, connector_status_disconnected);
>
> fwnode_handle_put(dp->connector_fwnode);
> }
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 3ac4bf87f257..886aa1861ed9 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1141,7 +1141,8 @@ struct drm_connector_funcs {
> * This will get called when a hotplug-event for a drm-connector
> * has been received from a source outside the display driver / device.
> */
> - void (*oob_hotplug_event)(struct drm_connector *connector);
> + void (*oob_hotplug_event)(struct drm_connector *connector,
> + enum drm_connector_status status);
>
> /**
> * @debugfs_init:
> @@ -1749,7 +1750,8 @@ drm_connector_is_unregistered(struct drm_connector *connector)
> DRM_CONNECTOR_UNREGISTERED;
> }
>
> -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode);
> +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
> + enum drm_connector_status status);
> const char *drm_get_connector_type_name(unsigned int connector_type);
> const char *drm_get_connector_status_name(enum drm_connector_status status);
> const char *drm_get_subpixel_order_name(enum subpixel_order order);
> --
> 2.35.1
thanks,
--
heikki