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authorEric Cook <Eric.Cook@amd.com>2017-04-26 11:51:38 -0400
committerAlex Deucher <alexander.deucher@amd.com>2017-09-26 18:06:43 -0400
commit7cc9e7a68abef8d1303700bac6f58ab76bc9db7b (patch)
tree19c9b347a3f4998ff5afad6e1eb7b3bb5b7a3cf0 /drivers/gpu
parent1c29313b96fbe9606ecaab540800d20f2ae88adc (diff)
downloadlinux-7cc9e7a68abef8d1303700bac6f58ab76bc9db7b.tar.bz2
drm/amd/display: Check for Zero Range in FreeSync Calc
-check for min/max range in freesync calculation and handle it accordingly Signed-off-by: Eric <eric.cook@amd.com> Acked-by: Harry Wentland <Harry.Wentland@amd.com> Reviewed-by: Anthony Koo <Anthony.Koo@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/amd/display/modules/freesync/freesync.c15
1 files changed, 15 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 d3d57008271b..009cb797bcfa 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -363,6 +363,21 @@ static void calc_freesync_range(struct core_freesync *core_freesync,
unsigned int index = map_index_from_stream(core_freesync, stream);
uint32_t vtotal = stream->timing.v_total;
+ if ((min_refresh_in_uhz == 0) || (max_refresh_in_uhz == 0)) {
+ state->freesync_range.min_refresh =
+ state->nominal_refresh_rate_in_micro_hz;
+ state->freesync_range.max_refresh =
+ state->nominal_refresh_rate_in_micro_hz;
+
+ state->freesync_range.max_frame_duration = 0;
+ state->freesync_range.min_frame_duration = 0;
+
+ state->freesync_range.vmax = vtotal;
+ state->freesync_range.vmin = vtotal;
+
+ return;
+ }
+
min_frame_duration_in_ns = ((unsigned int) (div64_u64(
(1000000000ULL * 1000000),
max_refresh_in_uhz)));