From b4076fdda5a4f35c60cab965802c6afa85acd2cb Mon Sep 17 00:00:00 2001 From: Tony Cheng Date: Tue, 26 Sep 2017 10:16:34 -0400 Subject: [PATCH 2503/4131] drm/amd/display: fix bug in force_single_disp_pipe_split should only lower dpp clock. Signed-off-by: Tony Cheng Reviewed-by: Yongqiang Sun Acked-by: Harry Wentland --- drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c index aa56243..cf474eb 100644 --- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c +++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c @@ -732,11 +732,14 @@ void hack_disable_optional_pipe_split(struct dcn_bw_internal_vars *v) void hack_force_pipe_split(struct dcn_bw_internal_vars *v, unsigned int pixel_rate_khz) { + float pixel_rate_mhz = pixel_rate_khz / 1000; + /* * force enabling pipe split by lower dpp clock for DPM0 to just * below the specify pixel_rate, so bw calc would split pipe. */ - v->max_dppclk[0] = pixel_rate_khz / 1000; + if (pixel_rate_mhz < v->max_dppclk[0]) + v->max_dppclk[0] = pixel_rate_mhz; } void hack_bounding_box(struct dcn_bw_internal_vars *v, -- 2.7.4