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| author | George Shen <george.shen@amd.com> | 2021-09-16 19:55:39 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-04-26 17:22:43 -0400 |
| commit | b528cac6deaacd7baa0896b7cb2cf98e87926d17 (patch) | |
| tree | ef3e3b8440ffb9cb7e9828f6dc02fc3ae7bb5f03 /drivers/gpu/drm/amd | |
| parent | 6f3b69139c3c1f7880ef52cc29571cb74ce8220a (diff) | |
| download | linux-stable-b528cac6deaacd7baa0896b7cb2cf98e87926d17.tar.gz linux-stable-b528cac6deaacd7baa0896b7cb2cf98e87926d17.tar.bz2 linux-stable-b528cac6deaacd7baa0896b7cb2cf98e87926d17.zip | |
drm/amd/display: Handle Y carry-over in VCP X.Y calculation
Theoretically rare corner case where ceil(Y) results in rounding up to
an integer. If this happens, the 1 should be carried over to the X
value.
CC: stable@vger.kernel.org
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.c index 48e63550f696..03b4ac2f1991 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.c @@ -395,6 +395,12 @@ void dcn31_hpo_dp_link_enc_set_throttled_vcp_size( x), 25)); + // If y rounds up to integer, carry it over to x. + if (y >> 25) { + x += 1; + y = 0; + } + switch (stream_encoder_inst) { case 0: REG_SET_2(DP_DPHY_SYM32_VC_RATE_CNTL0, 0, |