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authorHans Verkuil <hans.verkuil@cisco.com>2017-08-15 16:07:25 +0200
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-09-23 13:43:04 +0200
commit333ef6bd10c3ffdaf6da94e34dc6cae675ed27fc (patch)
tree0f01c42950d43741dcac85bb4a31397cd3fb5e56 /include/media/cec.h
parentmedia: cec-core.rst/cec-ioc-receive.rst: clarify CEC_TX_STATUS_ERROR (diff)
downloadlinux-333ef6bd10c3ffdaf6da94e34dc6cae675ed27fc.tar.xz
linux-333ef6bd10c3ffdaf6da94e34dc6cae675ed27fc.zip
media: cec: add CEC_EVENT_PIN_HPD_LOW/HIGH events
Add support for two new low-level events: PIN_HPD_LOW and PIN_HPD_HIGH. This is specifically meant for use with the upcoming cec-gpio driver and makes it possible to trace when the HPD pin changes. Some HDMI sinks do strange things with the HPD and this makes it easy to debug this. Note that this also moves the initialization of a devnode mutex and list to the allocate_adapter function: if the HPD is high, then as soon as the HPD interrupt is created an interrupt occurs and cec_queue_pin_hpd_event() is called which requires that the devnode mutex and list are initialized. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'include/media/cec.h')
-rw-r--r--include/media/cec.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/include/media/cec.h b/include/media/cec.h
index df6b3bd31284..9d0f983faea9 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -91,7 +91,7 @@ struct cec_event_entry {
};
#define CEC_NUM_CORE_EVENTS 2
-#define CEC_NUM_EVENTS CEC_EVENT_PIN_CEC_HIGH
+#define CEC_NUM_EVENTS CEC_EVENT_PIN_HPD_HIGH
struct cec_fh {
struct list_head list;
@@ -297,6 +297,16 @@ void cec_queue_pin_cec_event(struct cec_adapter *adap,
bool is_high, ktime_t ts);
/**
+ * cec_queue_pin_hpd_event() - queue a pin event with a given timestamp.
+ *
+ * @adap: pointer to the cec adapter
+ * @is_high: when true the HPD pin is high, otherwise it is low
+ * @ts: the timestamp for this event
+ *
+ */
+void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts);
+
+/**
* cec_get_edid_phys_addr() - find and return the physical address
*
* @edid: pointer to the EDID data