From: Yu-ting Shen <[email protected]> [Why] when changing display clock, SMU need to use power up DFS and use DENTIST to ramp DFS DID to switch target frequency before switching back to bypass.
[How] fixed the minimum display clock to 100MHz, it's W/A the same with PCO. Signed-off-by: Yu-ting Shen <[email protected]> Reviewed-by: Tony Cheng <[email protected]> Acked-by: Rodrigo Siqueira <[email protected]> Acked-by: Harry Wentland <[email protected]> --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 3 +++ drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index 883ecd2ed4c8..78971b6b195c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -2786,6 +2786,9 @@ void dcn20_calculate_dlg_params( != dm_dram_clock_change_unsupported; context->bw_ctx.bw.dcn.clk.dppclk_khz = 0; + if (context->bw_ctx.bw.dcn.clk.dispclk_khz < dc->debug.min_disp_clk_khz) + context->bw_ctx.bw.dcn.clk.dispclk_khz = dc->debug.min_disp_clk_khz; + /* * An artifact of dml pipe split/odm is that pipes get merged back together for * calculation. Therefore we need to only extract for first pipe in ascending index order diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index aa73025c1747..dce4966eca20 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -859,6 +859,7 @@ static const struct dc_debug_options debug_defaults_drv = { .timing_trace = false, .clock_trace = true, .disable_pplib_clock_request = true, + .min_disp_clk_khz = 100000, .pipe_split_policy = MPC_SPLIT_AVOID_MULT_DISP, .force_single_disp_pipe_split = false, .disable_dcc = DCC_ENABLE, -- 2.25.0 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
