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[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>
This commit is contained in:
Hans Verkuil 2013-08-19 11:21:50 -03:00 committed by Mauro Carvalho Chehab
parent 70b654945b
commit b8f0fff427
4 changed files with 55 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/media/i2c/ad9389b.c
View File

@ -648,12 +648,12 @@ static int ad9389b_s_dv_timings(struct v4l2_subdev *sd,
v4l2_dbg(1, debug, sd, "%s:\n", __func__);
/* quick sanity check */
if (!v4l2_valid_dv_timings(timings, &ad9389b_timings_cap))
if (!v4l2_valid_dv_timings(timings, &ad9389b_timings_cap, NULL, NULL))
return -EINVAL;
/* Fill the optional fields .standards and .flags in struct v4l2_dv_timings
if the format is one of the CEA or DMT timings. */
v4l2_find_dv_timings_cap(timings, &ad9389b_timings_cap, 0);
v4l2_find_dv_timings_cap(timings, &ad9389b_timings_cap, 0, NULL, NULL);
timings->bt.flags &= ~V4L2_DV_FL_REDUCED_FPS;
@ -691,7 +691,8 @@ static int ad9389b_g_dv_timings(struct v4l2_subdev *sd,
static int ad9389b_enum_dv_timings(struct v4l2_subdev *sd,
struct v4l2_enum_dv_timings *timings)
{
return v4l2_enum_dv_timings_cap(timings, &ad9389b_timings_cap);
return v4l2_enum_dv_timings_cap(timings, &ad9389b_timings_cap,
NULL, NULL);
}
static int ad9389b_dv_timings_cap(struct v4l2_subdev *sd,

9
drivers/media/i2c/ths8200.c
View File

@ -378,10 +378,12 @@ static int ths8200_s_dv_timings(struct v4l2_subdev *sd,
v4l2_dbg(1, debug, sd, "%s:\n", __func__);
if (!v4l2_valid_dv_timings(timings, &ths8200_timings_cap))
if (!v4l2_valid_dv_timings(timings, &ths8200_timings_cap,
NULL, NULL))
return -EINVAL;
if (!v4l2_find_dv_timings_cap(timings, &ths8200_timings_cap, 10)) {
if (!v4l2_find_dv_timings_cap(timings, &ths8200_timings_cap, 10,
NULL, NULL)) {
v4l2_dbg(1, debug, sd, "Unsupported format\n");
return -EINVAL;
}
@ -411,7 +413,8 @@ static int ths8200_g_dv_timings(struct v4l2_subdev *sd,
static int ths8200_enum_dv_timings(struct v4l2_subdev *sd,
struct v4l2_enum_dv_timings *timings)
{
return v4l2_enum_dv_timings_cap(timings, &ths8200_timings_cap);
return v4l2_enum_dv_timings_cap(timings, &ths8200_timings_cap,
NULL, NULL);
}
static int ths8200_dv_timings_cap(struct v4l2_subdev *sd,

25
drivers/media/v4l2-core/v4l2-dv-timings.c
View File

@ -132,7 +132,9 @@ const struct v4l2_dv_timings v4l2_dv_timings_presets[] = {
EXPORT_SYMBOL_GPL(v4l2_dv_timings_presets);
bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t,
const struct v4l2_dv_timings_cap *dvcap)
const struct v4l2_dv_timings_cap *dvcap,
v4l2_check_dv_timings_fnc fnc,
void *fnc_handle)
{
const struct v4l2_bt_timings *bt = &t->bt;
const struct v4l2_bt_timings_cap *cap = &dvcap->bt;
@ -151,18 +153,21 @@ bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t,
(bt->interlaced && !(caps & V4L2_DV_BT_CAP_INTERLACED)) ||
(!bt->interlaced && !(caps & V4L2_DV_BT_CAP_PROGRESSIVE)))
return false;
return true;
return fnc == NULL || fnc(t, fnc_handle);
}
EXPORT_SYMBOL_GPL(v4l2_valid_dv_timings);
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)
{
u32 i, idx;
memset(t->reserved, 0, sizeof(t->reserved));
for (i = idx = 0; v4l2_dv_timings_presets[i].bt.width; i++) {
if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap) &&
if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap,
fnc, fnc_handle) &&
idx++ == t->index) {
t->timings = v4l2_dv_timings_presets[i];
return 0;
@ -174,16 +179,20 @@ EXPORT_SYMBOL_GPL(v4l2_enum_dv_timings_cap);
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)
{
int i;
if (!v4l2_valid_dv_timings(t, cap))
if (!v4l2_valid_dv_timings(t, cap, fnc, fnc_handle))
return false;
for (i = 0; i < v4l2_dv_timings_presets[i].bt.width; i++) {
if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap) &&
v4l2_match_dv_timings(t, v4l2_dv_timings_presets + i, pclock_delta)) {
if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap,
fnc, fnc_handle) &&
v4l2_match_dv_timings(t, v4l2_dv_timings_presets + i,
pclock_delta)) {
*t = v4l2_dv_timings_presets[i];
return true;
}

34
include/media/v4l2-dv-timings.h
View File

@ -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.