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authorHans Verkuil <hans.verkuil@cisco.com>2017-04-17 07:54:37 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-04-19 06:53:18 -0300
commitee7e987133c381dceea3acab27f1350936f5ec1f (patch)
treef97782a07d8bea4c4944ad5edd03ad003713caf4 /include/media/cec.h
parent56a263aaa0a5f58d70517fae2bdd63fc1e17efec (diff)
[media] cec.h: merge cec-edid.h into cec.h
Drop the separate cec-edid.h header and merge it into cec.h. There was really no need to have a separate header for this. 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.h102
1 files changed, 101 insertions, 1 deletions
diff --git a/include/media/cec.h b/include/media/cec.h
index bae8d0153de7..b8eb895731d5 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -29,7 +29,6 @@
#include <linux/timer.h>
#include <linux/cec-funcs.h>
#include <media/rc-core.h>
-#include <media/cec-edid.h>
#include <media/cec-notifier.h>
/**
@@ -204,6 +203,9 @@ static inline bool cec_is_sink(const struct cec_adapter *adap)
return adap->phys_addr == 0;
}
+#define cec_phys_addr_exp(pa) \
+ ((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf
+
#if IS_ENABLED(CONFIG_CEC_CORE)
struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
void *priv, const char *name, u32 caps, u8 available_las);
@@ -223,6 +225,81 @@ void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg);
+/**
+ * cec_get_edid_phys_addr() - find and return the physical address
+ *
+ * @edid: pointer to the EDID data
+ * @size: size in bytes of the EDID data
+ * @offset: If not %NULL then the location of the physical address
+ * bytes in the EDID will be returned here. This is set to 0
+ * if there is no physical address found.
+ *
+ * Return: the physical address or CEC_PHYS_ADDR_INVALID if there is none.
+ */
+u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
+ unsigned int *offset);
+
+/**
+ * cec_set_edid_phys_addr() - find and set the physical address
+ *
+ * @edid: pointer to the EDID data
+ * @size: size in bytes of the EDID data
+ * @phys_addr: the new physical address
+ *
+ * This function finds the location of the physical address in the EDID
+ * and fills in the given physical address and updates the checksum
+ * at the end of the EDID block. It does nothing if the EDID doesn't
+ * contain a physical address.
+ */
+void cec_set_edid_phys_addr(u8 *edid, unsigned int size, u16 phys_addr);
+
+/**
+ * cec_phys_addr_for_input() - calculate the PA for an input
+ *
+ * @phys_addr: the physical address of the parent
+ * @input: the number of the input port, must be between 1 and 15
+ *
+ * This function calculates a new physical address based on the input
+ * port number. For example:
+ *
+ * PA = 0.0.0.0 and input = 2 becomes 2.0.0.0
+ *
+ * PA = 3.0.0.0 and input = 1 becomes 3.1.0.0
+ *
+ * PA = 3.2.1.0 and input = 5 becomes 3.2.1.5
+ *
+ * PA = 3.2.1.3 and input = 5 becomes f.f.f.f since it maxed out the depth.
+ *
+ * Return: the new physical address or CEC_PHYS_ADDR_INVALID.
+ */
+u16 cec_phys_addr_for_input(u16 phys_addr, u8 input);
+
+/**
+ * cec_phys_addr_validate() - validate a physical address from an EDID
+ *
+ * @phys_addr: the physical address to validate
+ * @parent: if not %NULL, then this is filled with the parents PA.
+ * @port: if not %NULL, then this is filled with the input port.
+ *
+ * This validates a physical address as read from an EDID. If the
+ * PA is invalid (such as 1.0.1.0 since '0' is only allowed at the end),
+ * then it will return -EINVAL.
+ *
+ * The parent PA is passed into %parent and the input port is passed into
+ * %port. For example:
+ *
+ * PA = 0.0.0.0: has parent 0.0.0.0 and input port 0.
+ *
+ * PA = 1.0.0.0: has parent 0.0.0.0 and input port 1.
+ *
+ * PA = 3.2.0.0: has parent 3.0.0.0 and input port 2.
+ *
+ * PA = f.f.f.f: has parent f.f.f.f and input port 0.
+ *
+ * Return: 0 if the PA is valid, -EINVAL if not.
+ */
+int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port);
+
#ifdef CONFIG_MEDIA_CEC_NOTIFIER
void cec_register_cec_notifier(struct cec_adapter *adap,
struct cec_notifier *notifier);
@@ -249,6 +326,29 @@ static inline void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr,
{
}
+static inline u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
+ unsigned int *offset)
+{
+ if (offset)
+ *offset = 0;
+ return CEC_PHYS_ADDR_INVALID;
+}
+
+static inline void cec_set_edid_phys_addr(u8 *edid, unsigned int size,
+ u16 phys_addr)
+{
+}
+
+static inline u16 cec_phys_addr_for_input(u16 phys_addr, u8 input)
+{
+ return CEC_PHYS_ADDR_INVALID;
+}
+
+static inline int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port)
+{
+ return 0;
+}
+
#endif
#endif /* _MEDIA_CEC_H */