This is a note to let you know that I've just added the patch titled
soc: qcom: pmic-glink: switch to DRM_AUX_HPD_BRIDGE
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
soc-qcom-pmic-glink-switch-to-drm_aux_hpd_bridge.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c2f051c3e81e9216cc2ca7096b1dfd0093ae89a3
Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Date: Sun Dec 3 14:43:32 2023 +0300
soc: qcom: pmic-glink: switch to DRM_AUX_HPD_BRIDGE
[ Upstream commit 2bcca96abfbf89d26fc10fc92e40532bb2ae8891 ]
Use the freshly defined DRM_AUX_HPD_BRIDGE instead of open-coding the
same functionality for the DRM bridge chain termination.
Reviewed-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Acked-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231203114333.1305826-6-dmitry.baryshkov@xxxxxxxxxx
Stable-dep-of: b979f2d50a09 ("soc: qcom: pmic_glink_altmode: fix drm bridge use-after-free")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index b3634e10f6f5e..c954001ae79ec 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -86,6 +86,7 @@ config QCOM_PMIC_GLINK
depends on OF
select AUXILIARY_BUS
select QCOM_PDR_HELPERS
+ select DRM_AUX_HPD_BRIDGE
help
The Qualcomm PMIC GLINK driver provides access, over GLINK, to the
USB and battery firmware running on one of the coprocessors in
diff --git a/drivers/soc/qcom/pmic_glink_altmode.c b/drivers/soc/qcom/pmic_glink_altmode.c
index 7ee52cf2570fa..1539ccb7a346d 100644
--- a/drivers/soc/qcom/pmic_glink_altmode.c
+++ b/drivers/soc/qcom/pmic_glink_altmode.c
@@ -11,7 +11,7 @@
#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/soc/qcom/pdr.h>
-#include <drm/drm_bridge.h>
+#include <drm/bridge/aux-bridge.h>
#include <linux/usb/typec_altmode.h>
#include <linux/usb/typec_dp.h>
@@ -76,7 +76,7 @@ struct pmic_glink_altmode_port {
struct work_struct work;
- struct drm_bridge bridge;
+ struct device *bridge;
enum typec_orientation orientation;
u16 svid;
@@ -230,10 +230,10 @@ static void pmic_glink_altmode_worker(struct work_struct *work)
else
pmic_glink_altmode_enable_usb(altmode, alt_port);
- if (alt_port->hpd_state)
- drm_bridge_hpd_notify(&alt_port->bridge, connector_status_connected);
- else
- drm_bridge_hpd_notify(&alt_port->bridge, connector_status_disconnected);
+ drm_aux_hpd_bridge_notify(alt_port->bridge,
+ alt_port->hpd_state ?
+ connector_status_connected :
+ connector_status_disconnected);
pmic_glink_altmode_request(altmode, ALTMODE_PAN_ACK, alt_port->index);
};
@@ -365,16 +365,6 @@ static void pmic_glink_altmode_callback(const void *data, size_t len, void *priv
}
}
-static int pmic_glink_altmode_attach(struct drm_bridge *bridge,
- enum drm_bridge_attach_flags flags)
-{
- return flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR ? 0 : -EINVAL;
-}
-
-static const struct drm_bridge_funcs pmic_glink_altmode_bridge_funcs = {
- .attach = pmic_glink_altmode_attach,
-};
-
static void pmic_glink_altmode_put_retimer(void *data)
{
typec_retimer_put(data);
@@ -464,15 +454,10 @@ static int pmic_glink_altmode_probe(struct auxiliary_device *adev,
alt_port->index = port;
INIT_WORK(&alt_port->work, pmic_glink_altmode_worker);
- alt_port->bridge.funcs = &pmic_glink_altmode_bridge_funcs;
- alt_port->bridge.of_node = to_of_node(fwnode);
- alt_port->bridge.ops = DRM_BRIDGE_OP_HPD;
- alt_port->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
-
- ret = devm_drm_bridge_add(dev, &alt_port->bridge);
- if (ret) {
+ alt_port->bridge = drm_dp_hpd_bridge_register(dev, to_of_node(fwnode));
+ if (IS_ERR(alt_port->bridge)) {
fwnode_handle_put(fwnode);
- return ret;
+ return PTR_ERR(alt_port->bridge);
}
alt_port->dp_alt.svid = USB_TYPEC_DP_SID;
