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authorHans Verkuil <hans.verkuil@cisco.com>2013-08-19 18:21:50 +0400
committerMauro Carvalho Chehab <m.chehab@samsung.com>2013-08-24 11:30:01 +0400
commitb8f0fff4279a1b85fa4b6d7d8b538c254edcb4a1 (patch)
tree9ab3d196fe8e7633baa8b7bb6726af43d8187710 /include/media
parent70b654945bacd27622ef1c424f054ae04de597e0 (diff)
downloadlinux-b8f0fff4279a1b85fa4b6d7d8b538c254edcb4a1.tar.xz
[media] v4l2-dv-timings: add callback to handle exceptions
In most cases the v4l2_bt_timings_cap struct has all the information necessary to determine valid timings, but occasionally there are exceptions. Add a callback function to be able to test for those exceptions. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'include/media')
-rw-r--r--include/media/v4l2-dv-timings.h34
1 files changed, 28 insertions, 6 deletions
diff --git a/include/media/v4l2-dv-timings.h b/include/media/v4l2-dv-timings.h
index bd59df8125c6..4becc6716393 100644
--- a/include/media/v4l2-dv-timings.h
+++ b/include/media/v4l2-dv-timings.h
@@ -27,46 +27,68 @@
*/
extern const struct v4l2_dv_timings v4l2_dv_timings_presets[];
+/** v4l2_check_dv_timings_fnc - timings check callback
+ * @t: the v4l2_dv_timings struct.
+ * @handle: a handle from the driver.
+ *
+ * Returns true if the given timings are valid.
+ */
+typedef bool v4l2_check_dv_timings_fnc(const struct v4l2_dv_timings *t, void *handle);
+
/** v4l2_valid_dv_timings() - are these timings valid?
* @t: the v4l2_dv_timings struct.
* @cap: the v4l2_dv_timings_cap capabilities.
+ * @fnc: callback to check if this timing is OK. May be NULL.
+ * @fnc_handle: a handle that is passed on to @fnc.
*
* Returns true if the given dv_timings struct is supported by the
- * hardware capabilities, returns false otherwise.
+ * hardware capabilities and the callback function (if non-NULL), returns
+ * false otherwise.
*/
bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t,
- const struct v4l2_dv_timings_cap *cap);
+ const struct v4l2_dv_timings_cap *cap,
+ v4l2_check_dv_timings_fnc fnc,
+ void *fnc_handle);
/** v4l2_enum_dv_timings_cap() - Helper function to enumerate possible DV timings based on capabilities
* @t: the v4l2_enum_dv_timings struct.
* @cap: the v4l2_dv_timings_cap capabilities.
+ * @fnc: callback to check if this timing is OK. May be NULL.
+ * @fnc_handle: a handle that is passed on to @fnc.
*
* This enumerates dv_timings using the full list of possible CEA-861 and DMT
* timings, filtering out any timings that are not supported based on the
- * hardware capabilities.
+ * hardware capabilities and the callback function (if non-NULL).
*
* If a valid timing for the given index is found, it will fill in @t and
* return 0, otherwise it returns -EINVAL.
*/
int v4l2_enum_dv_timings_cap(struct v4l2_enum_dv_timings *t,
- const struct v4l2_dv_timings_cap *cap);
+ const struct v4l2_dv_timings_cap *cap,
+ v4l2_check_dv_timings_fnc fnc,
+ void *fnc_handle);
/** v4l2_find_dv_timings_cap() - Find the closest timings struct
* @t: the v4l2_enum_dv_timings struct.
* @cap: the v4l2_dv_timings_cap capabilities.
* @pclock_delta: maximum delta between t->pixelclock and the timing struct
* under consideration.
+ * @fnc: callback to check if a given timings struct is OK. May be NULL.
+ * @fnc_handle: a handle that is passed on to @fnc.
*
* This function tries to map the given timings to an entry in the
* full list of possible CEA-861 and DMT timings, filtering out any timings
- * that are not supported based on the hardware capabilities.
+ * that are not supported based on the hardware capabilities and the callback
+ * function (if non-NULL).
*
* On success it will fill in @t with the found timings and it returns true.
* On failure it will return false.
*/
bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t,
const struct v4l2_dv_timings_cap *cap,
- unsigned pclock_delta);
+ unsigned pclock_delta,
+ v4l2_check_dv_timings_fnc fnc,
+ void *fnc_handle);
/** v4l2_match_dv_timings() - do two timings match?
* @measured: the measured timings data.