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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>
| 2024-04-30 21:26:04 -0400 |
| commit | 719564737a9ac3d0b49c314450b56cf6f7d71358 (patch) | |
| tree | 70a828ba0ff24db0b0621ff3013da54eb4d465a0 /drivers | |
| parent | drm/amdgpu: Fix VRAM memory accounting (diff) | |
| download | linux-719564737a9ac3d0b49c314450b56cf6f7d71358.tar.gz linux-719564737a9ac3d0b49c314450b56cf6f7d71358.tar.bz2 linux-719564737a9ac3d0b49c314450b56cf6f7d71358.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')
| -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 5b7ad38f85e0..65e45a0b4ff3 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, |