6.8-stable review patch. If anyone has any objections, please let me know.
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From: George Shen george.shen@amd.com
commit 719564737a9ac3d0b49c314450b56cf6f7d71358 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- 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 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,