nv-tegra-mirror/linux-nv-oot
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nv-oot.git synced 2025-12-24 02:01:36 +03:00
Code Issues Packages Projects Releases Wiki Activity

tegra: cam_fsync: fix precise freq add extra ticks for all generators

Browse Source 
Extra ticks must be added for all generator

Bug 4951965

Change-Id: Ie3a7bdb52fd2f06188b32a1c90896c6ba4aa12cc
Signed-off-by: Mohit Ingale <mohiti@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3249235
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3251915
Reviewed-by: Frank Chen <frankc@nvidia.com>
Reviewed-by: Jagadeesh Kinni <jkinni@nvidia.com>
Reviewed-by: Ian Kaszubski <ikaszubski@nvidia.com>
This commit is contained in:
Mohit Ingale
2024-11-14 22:05:59 +00:00
committed by Jon Hunter
parent 8f35375054
commit 62c37911c9
1 changed files with 10 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/media/platform/tegra/cam_fsync/cam_fsync.c
View File

@@ -467,24 +467,22 @@ static int cam_fsync_program_group_generator_edges(struct fsync_generator_group
struct cam_fsync_extra_ticks_and_period extra = {0, 1};
bool const can_generate_precise_freq = cam_fsync_can_generate_precise_freq(group);
/**
* Generating a freq with period that is not multiple of TSC unit will
* cause the signal to drift over time. To avoid this, if precise signal
* is supported, calculate the extra ticks over the number of periods
* using @ref getextra_ticksAndPeriodFor30Hz() for accurate phase alignment.
* If the signal is not precise, set the extra ticks to 0 and number of
* periods to 1 which is the default case.
*/
if (can_generate_precise_freq)
cam_fsync_get_extra_ticks_and_period_for_30hz(&extra,
ticks_per_hz);
list_for_each_entry(generator, &group->generators, list) {
u32 ticks_in_period = 0;
u32 ticks_active = 0;
u32 ticks_inactive = 0;
u32 const edge_reg_offset = 8U;
u32 i = 0;
/**
* Generating a freq with period that is not multiple of TSC unit will
* cause the signal to drift over time. To avoid this, if precise signal
* is supported, calculate the extra ticks over the number of periods
* using @ref getextra_ticksAndPeriodFor30Hz() for accurate phase alignment.
* If the signal is not precise, set the extra ticks to 0 and number of
* periods to 1 which is the default case.
*/
if (can_generate_precise_freq)
cam_fsync_get_extra_ticks_and_period_for_30hz(&extra, ticks_per_hz);
if (group->features->rational_locking.enforced) {
ticks_in_period = DIV_ROUND_CLOSEST(ticks_per_hz,