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| author | Harry VanZyllDeJong <hvanzyll@amd.com> | 2026-07-15 14:58:42 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-08-06 09:58:25 -0400 |
| commit | 3df68ac6a75feffedbbf3f24e7914ebb3d79d631 (patch) | |
| tree | 46f7266d4ddc096d7d2522de9e7d922c184cdf45 | |
| parent | 807d6345bc8ee57dee1991e726d3aa012543b169 (diff) | |
| download | linux-3df68ac6a75feffedbbf3f24e7914ebb3d79d631.tar.gz linux-3df68ac6a75feffedbbf3f24e7914ebb3d79d631.zip | |
drm/amd/display: Update VRR info packet to support 12-bit refresh rates
[Why]
VRR info packet previously only supported up to 10-bit refresh rate values
limiting the range of FreeSync minimum and maximum refresh rates that
could be encoded.
[How]
Expanded the bit masking in PB11/PB12 from 2 to 4 bits to capture bits
11:8 of the minimum and maximum FreeSync refresh rates, enabling the VRR
info packet to encode 12-bit refresh rate values.
Reviewed-by: Anthony Koo <anthony.koo@amd.com>
Signed-off-by: Harry VanZyllDeJong <hvanzyll@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index f3b41087678b..4bd060e30799 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -684,11 +684,11 @@ static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, /* PB8 = FreeSync Maximum refresh rate (Hz) */ infopacket->sb[8] = max_refresh & 0xFF; - /* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 9:8 */ - infopacket->sb[11] = (min_programmed >> 8) & 0x03; + /* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 11:8 */ + infopacket->sb[11] = (min_programmed >> 8) & 0x0F; - /* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 9:8 */ - infopacket->sb[12] = (max_refresh >> 8) & 0x03; + /* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 11:8 */ + infopacket->sb[12] = (max_refresh >> 8) & 0x0F; /* PB16 : Reserved bits 7:1, FixedRate bit 0 */ infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 0; |