diff options
Diffstat (limited to 'include/media/cec.h')
| -rw-r--r-- | include/media/cec.h | 119 |
1 files changed, 117 insertions, 2 deletions
diff --git a/include/media/cec.h b/include/media/cec.h index 96a0aa770d61..b8eb895731d5 100644 --- a/include/media/cec.h +++ b/include/media/cec.h @@ -29,7 +29,7 @@ #include <linux/timer.h> #include <linux/cec-funcs.h> #include <media/rc-core.h> -#include <media/cec-edid.h> +#include <media/cec-notifier.h> /** * struct cec_devnode - cec device node @@ -173,6 +173,10 @@ struct cec_adapter { bool passthrough; struct cec_log_addrs log_addrs; +#ifdef CONFIG_MEDIA_CEC_NOTIFIER + struct cec_notifier *notifier; +#endif + struct dentry *cec_dir; struct dentry *status_file; @@ -184,6 +188,11 @@ struct cec_adapter { char input_drv[32]; }; +static inline void *cec_get_drvdata(const struct cec_adapter *adap) +{ + return adap->priv; +} + static inline bool cec_has_log_addr(const struct cec_adapter *adap, u8 log_addr) { return adap->log_addrs.log_addr_mask & (1 << log_addr); @@ -194,7 +203,10 @@ static inline bool cec_is_sink(const struct cec_adapter *adap) return adap->phys_addr == 0; } -#if IS_ENABLED(CONFIG_MEDIA_CEC_SUPPORT) +#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); int cec_register_adapter(struct cec_adapter *adap, struct device *parent); @@ -213,6 +225,86 @@ 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); +#endif + #else static inline int cec_register_adapter(struct cec_adapter *adap, @@ -234,6 +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 */ |