From: Yogesh Mohan Marimuthu <[email protected]> [Why] In newer hardware MANUAL_FLOW_CONTROL is not a trigger bit. Due to this front porch is fixed and in these hardware freesync does not work.
[How] Change the programming to generate a pulse so that the event will be triggered, front porch will be cut short and freesync will work. Signed-off-by: Yogesh Mohan Marimuthu <[email protected]> Reviewed-by: Anthony Koo <[email protected]> Acked-by: Bhawanpreet Lakha <[email protected]> --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c index e5e5be63032b..e98e6bab4808 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c @@ -825,6 +825,9 @@ void optc1_program_manual_trigger(struct timing_generator *optc) REG_SET(OTG_MANUAL_FLOW_CONTROL, 0, MANUAL_FLOW_CONTROL, 1); + + REG_SET(OTG_MANUAL_FLOW_CONTROL, 0, + MANUAL_FLOW_CONTROL, 0); } -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
