From: Aric Cyr <aric....@amd.com>
[ Upstream commit 3fc6376ed6f2f67bc9fb0c7a3cf07967d6aa6216 ]
[Why]
When calculating nominal refresh rates, don't round.
Only the VSIF needs to be rounded.
[How]
Revert rounding change for nominal and just round when forming the
FreeSync VSIF.
Signed-off-by: Aric Cyr <aric....@amd.com>
Reviewed-by: Anthony Koo <anthony....@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.sique...@amd.com>
Acked-by: Harry Wentland <harry.wentl...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index d9ea4ae690af6..592ad78f731fd 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -524,12 +524,12 @@ static void build_vrr_infopacket_data(const struct
mod_vrr_params *vrr,
infopacket->sb[6] |= 0x04;
/* PB7 = FreeSync Minimum refresh rate (Hz) */
- infopacket->sb[7] = (unsigned char)(vrr->min_refresh_in_uhz / 1000000);
+ infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000)
/ 1000000);
/* PB8 = FreeSync Maximum refresh rate (Hz)
* Note: We should never go above the field rate of the mode timing set.
*/
- infopacket->sb[8] = (unsigned char)(vrr->max_refresh_in_uhz / 1000000);
+ infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000)
/ 1000000);
//FreeSync HDR
@@ -747,10 +747,6 @@ void mod_freesync_build_vrr_params(struct mod_freesync
*mod_freesync,
nominal_field_rate_in_uhz =
mod_freesync_calc_nominal_field_rate(stream);
- /* Rounded to the nearest Hz */
- nominal_field_rate_in_uhz = 1000000ULL *
- div_u64(nominal_field_rate_in_uhz + 500000, 1000000);
-
min_refresh_in_uhz = in_config->min_refresh_in_uhz;
max_refresh_in_uhz = in_config->max_refresh_in_uhz;
--
2.20.1
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