diff options
| author | Yongqiang Sun <yongqiang.sun@amd.com> | 2017-04-21 11:00:43 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 18:06:34 -0400 |
| commit | 6c626ffb1bfa2705e71376fe20bcdc6b89aace85 (patch) | |
| tree | 0ad1528d3b1538825939956aeb41a77aafe4bce1 /drivers/gpu/drm/amd/display/modules/freesync/freesync.c | |
| parent | 15350179f2fc3c3b28774b4abcd35c45a5449052 (diff) | |
drm/amd/display: Make sure v_total_min and max not less than v_total.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index 94566c0a0e62..5c6de723da5d 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -347,6 +347,7 @@ static void calc_vmin_vmax(struct core_freesync *core_freesync, { unsigned int min_frame_duration_in_ns = 0, max_frame_duration_in_ns = 0; unsigned int index = map_index_from_stream(core_freesync, stream); + uint32_t vtotal = stream->timing.v_total; min_frame_duration_in_ns = ((unsigned int) (div64_u64( (1000000000ULL * 1000000), @@ -362,6 +363,17 @@ static void calc_vmin_vmax(struct core_freesync *core_freesync, *vmin = div64_u64(div64_u64(((unsigned long long)( min_frame_duration_in_ns) * stream->timing.pix_clk_khz), stream->timing.h_total), 1000000); + + /* In case of 4k free sync monitor, vmin or vmax cannot be less than vtotal */ + if (*vmin < vtotal) { + ASSERT(false); + *vmin = vtotal; + } + + if (*vmax < vtotal) { + ASSERT(false); + *vmax = vtotal; + } } static void calc_v_total_from_duration(const struct dc_stream *stream, |