From: Vladimir Stempen <[email protected]> [Why] Currently we set FCLK p-state change watermark calculated based on dummy p-state latency when UCLK p-state is not supported
[How] Calculate FCLK p-state change watermark based on on FCLK pstate change latency in case UCLK p-state is not supported Reviewed-by: Nevenko Stupar <[email protected]> Acked-by: Alex Hung <[email protected]> Signed-off-by: Vladimir Stempen <[email protected]> --- drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c index 0dc1a03999b6..28e9f3644bf4 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c @@ -2126,6 +2126,10 @@ void dcn32_calculate_wm_and_dlg_fpu(struct dc *dc, struct dc_state *context, */ context->bw_ctx.bw.dcn.watermarks.a = context->bw_ctx.bw.dcn.watermarks.c; context->bw_ctx.bw.dcn.watermarks.a.cstate_pstate.pstate_change_ns = 0; + /* Calculate FCLK p-state change watermark based on FCLK pstate change latency in case + * UCLK p-state is not supported, to avoid underflow in case FCLK pstate is supported + */ + context->bw_ctx.bw.dcn.watermarks.a.cstate_pstate.fclk_pstate_change_ns = get_fclk_watermark(&context->bw_ctx.dml, pipes, pipe_cnt) * 1000; } else { /* Set A: * All clocks min. -- 2.39.1
