drm/amd/display: Add debug parameter to retain default clock table

[Why]
Need a way to retain default clock table to aid
the investigation into why 8k@30 display not
lighting up on dcn314

[How]
Use flag to prevent execution of bw_params helper
function and function for updating bw_bounding_box

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Daniel Miess <Daniel.Miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
index 7af1982..c74f2d5 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
@@ -719,7 +719,7 @@ void dcn314_clk_mgr_construct(
        if (clk_mgr->base.base.ctx->dc->debug.pstate_enabled) {
                dcn314_get_dpm_table_from_smu(&clk_mgr->base, &smu_dpm_clks);
 
-               if (ctx->dc_bios && ctx->dc_bios->integrated_info) {
+               if (ctx->dc_bios && ctx->dc_bios->integrated_info && ctx->dc->config.use_default_clock_table == false) {
                        dcn314_clk_mgr_helper_populate_bw_params(
                                        &clk_mgr->base,
                                        ctx->dc_bios->integrated_info,

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index efa827b..5908b60 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -353,6 +353,7 @@ struct dc_config {
        bool use_pipe_ctx_sync_logic;
        bool ignore_dpref_ss;
        bool enable_mipi_converter_optimization;
+       bool use_default_clock_table;
 };
 
 enum visual_confirm {

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
index c80307a..34a5d0f 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
@@ -189,7 +189,7 @@ void dcn314_update_bw_bounding_box_fpu(struct dc *dc, struct clk_bw_params *bw_p
        dc_assert_fp_enabled();
 
        // Default clock levels are used for diags, which may lead to overclocking.
-       if (!IS_DIAG_DC(dc->ctx->dce_environment)) {
+       if (!IS_DIAG_DC(dc->ctx->dce_environment) && dc->config.use_default_clock_table == false) {
 
                dcn3_14_ip.max_num_otg = dc->res_pool->res_cap->num_timing_generator;
                dcn3_14_ip.max_num_dpp = dc->res_pool->pipe_count;