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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2017-06-07 11:46:08 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-06-20 06:51:21 -0300 |
| commit | 23111ec304166750479e17318b7175ff7db0d6ac (patch) | |
| tree | ba0549ef87d364e73d3ca98c3d2df348a9b6f329 | |
| parent | acec3630155763c170c7ae6508cf973355464508 (diff) | |
| download | linux-23111ec304166750479e17318b7175ff7db0d6ac.tar.bz2 | |
[media] cec: add cec_s_phys_addr_from_edid helper function
This function simplifies the integration of CEC in DRM drivers.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| -rw-r--r-- | Documentation/media/kapi/cec-core.rst | 8 | ||||
| -rw-r--r-- | drivers/media/cec/cec-adap.c | 14 | ||||
| -rw-r--r-- | include/media/cec.h | 9 |
3 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst index 7a04c5386dc8..278b358b2f2e 100644 --- a/Documentation/media/kapi/cec-core.rst +++ b/Documentation/media/kapi/cec-core.rst @@ -307,6 +307,14 @@ to another valid physical address, then this function will first set the address to CEC_PHYS_ADDR_INVALID before enabling the new physical address. .. c:function:: + void cec_s_phys_addr_from_edid(struct cec_adapter *adap, + const struct edid *edid); + +A helper function that extracts the physical address from the edid struct +and calls cec_s_phys_addr() with that address, or CEC_PHYS_ADDR_INVALID +if the EDID did not contain a physical address or edid was a NULL pointer. + +.. c:function:: int cec_s_log_addrs(struct cec_adapter *adap, struct cec_log_addrs *log_addrs, bool block); diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c index fd6d9cccade7..61e39bbe3cf9 100644 --- a/drivers/media/cec/cec-adap.c +++ b/drivers/media/cec/cec-adap.c @@ -28,6 +28,8 @@ #include <linux/string.h> #include <linux/types.h> +#include <drm/drm_edid.h> + #include "cec-priv.h" static void cec_fill_msg_report_features(struct cec_adapter *adap, @@ -1408,6 +1410,18 @@ void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block) } EXPORT_SYMBOL_GPL(cec_s_phys_addr); +void cec_s_phys_addr_from_edid(struct cec_adapter *adap, + const struct edid *edid) +{ + u16 pa = CEC_PHYS_ADDR_INVALID; + + if (edid && edid->extensions) + pa = cec_get_edid_phys_addr((const u8 *)edid, + EDID_LENGTH * (edid->extensions + 1), NULL); + cec_s_phys_addr(adap, pa, false); +} +EXPORT_SYMBOL_GPL(cec_s_phys_addr_from_edid); + /* * Called from either the ioctl or a driver to set the logical addresses. * diff --git a/include/media/cec.h b/include/media/cec.h index bfa88d4d67e1..a548b292eeb1 100644 --- a/include/media/cec.h +++ b/include/media/cec.h @@ -206,6 +206,8 @@ static inline bool cec_is_sink(const struct cec_adapter *adap) #define cec_phys_addr_exp(pa) \ ((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf +struct edid; + #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); @@ -217,6 +219,8 @@ int cec_s_log_addrs(struct cec_adapter *adap, struct cec_log_addrs *log_addrs, bool block); void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block); +void cec_s_phys_addr_from_edid(struct cec_adapter *adap, + const struct edid *edid); int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg, bool block); @@ -326,6 +330,11 @@ static inline void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, { } +static inline void cec_s_phys_addr_from_edid(struct cec_adapter *adap, + const struct edid *edid) +{ +} + static inline u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size, unsigned int *offset) { |