Hi,
On 25-02-19 15:06, Greg Kroah-Hartman wrote:
On Mon, Feb 25, 2019 at 02:20:37PM +0100, Hans de Goede wrote:
Use the new drm_kms_call_oob_hotplug_notifier_chain() function to load
s/load/let/ fixed in my tree.
drm/kms drivers know about DisplayPort over Type-C hotplug events.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/usb/typec/altmodes/displayport.c | 34 ++++++++++++++++--------
1 file changed, 23 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
index 35161594e368..87760ea252d6 100644
--- a/drivers/usb/typec/altmodes/displayport.c
+++ b/drivers/usb/typec/altmodes/displayport.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/usb/pd_vdo.h>
#include <linux/usb/typec_dp.h>
+#include <drm/drm_probe_helper.h>
#define DP_HEADER(cmd) (VDO(USB_TYPEC_DP_SID, 1, cmd) | \
VDO_OPOS(USB_TYPEC_DP_MODE))
@@ -67,12 +68,23 @@ struct dp_altmode {
const struct typec_altmode *port;
};
-static int dp_altmode_notify(struct dp_altmode *dp)
+static int dp_altmode_notify(struct dp_altmode *dp, unsigned long conf)
+{
+ int ret;
+
+ ret = typec_altmode_notify(dp->alt, conf, &dp->data);
+ if (ret)
+ return ret;
+
+ drm_kms_call_oob_hotplug_notifier_chain(DRM_OOB_HOTPLUG_TYPE_C_DP);
Is this causing a build/run-time dependancy of the USB code on DRM now?
What about typec systems without DRM, is that a thing?
Good point, yes this adds a build/run-time dependancy on the drm-core
to the Type-C DisplayPort altmode driver (typec_displayport.ko). But
only to that driver, which can be enabled / disabled separately through
CONFIG_TYPEC_DP_ALTMODE and that specific Type-C altmode makes little
sense without having drm/kms support.
Your remark does make me realize that I have forgotten to add a Kconfig
dependency for this to the TYPEC_DP_ALTMODE Kconfig symbol, I will fix
this for v2.
Regards,
Hans
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