From ba9012fcb2741fdc0716493dd583f0f3e164b633 Mon Sep 17 00:00:00 2001 From: David Galiffi Date: Mon, 13 Sep 2021 18:05:24 -0400 Subject: drm/amd/display: Add debug support to override the Minimum DRAM Clock [Why] Requested feature to assist with Thermal, Acoustic, Power, and Performance tuning. [How] Add a debug field that will override calculated minimum DRAM clock, if the debug value is larger than the calculate value. Reviewed-by: Alvin Lee Acked-by: Anson Jacob Signed-off-by: David Galiffi Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dc.h | 1 + drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 4 ++++ 2 files changed, 5 insertions(+) (limited to 'drivers/gpu/drm/amd/display') diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index b194a2727bd8..a46c663ed8c5 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -565,6 +565,7 @@ struct dc_debug_options { enum wm_report_mode pplib_wm_report_mode; unsigned int min_disp_clk_khz; unsigned int min_dpp_clk_khz; + unsigned int min_dram_clk_khz; int sr_exit_time_dpm0_ns; int sr_enter_plus_exit_time_dpm0_ns; int sr_exit_time_ns; 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 3c388afa06dc..aeb868ace31c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -3117,6 +3117,10 @@ void dcn20_calculate_dlg_params( context->bw_ctx.bw.dcn.clk.dcfclk_khz = context->bw_ctx.dml.vba.DCFCLK * 1000; context->bw_ctx.bw.dcn.clk.socclk_khz = context->bw_ctx.dml.vba.SOCCLK * 1000; context->bw_ctx.bw.dcn.clk.dramclk_khz = context->bw_ctx.dml.vba.DRAMSpeed * 1000 / 16; + + if (dc->debug.min_dram_clk_khz > context->bw_ctx.bw.dcn.clk.dramclk_khz) + context->bw_ctx.bw.dcn.clk.dramclk_khz = dc->debug.min_dram_clk_khz; + context->bw_ctx.bw.dcn.clk.dcfclk_deep_sleep_khz = context->bw_ctx.dml.vba.DCFCLKDeepSleep * 1000; context->bw_ctx.bw.dcn.clk.fclk_khz = context->bw_ctx.dml.vba.FabricClock * 1000; context->bw_ctx.bw.dcn.clk.p_state_change_support = -- cgit v1.2.3-59-g8ed1b