drm/amd/display: Add debug key to allow disabling dtbclk

[HOW]
Add debug key to allow disabling dtbclk

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Muhammad Ahmed <ahmed.ahmed@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/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
index c378b879c76d8c062601f87c952668f920750a48..c6030bed95a03fe273190bb08094174a92af78a9 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
@@ -244,7 +244,8 @@ void dcn35_update_clocks(struct clk_mgr *clk_mgr_base,
                }
 
                if (clk_mgr_base->clks.dtbclk_en && !new_clocks->dtbclk_en) {
-                       dcn35_smu_set_dtbclk(clk_mgr, false);
+                       if (clk_mgr->base.ctx->dc->config.allow_0_dtb_clk)
+                               dcn35_smu_set_dtbclk(clk_mgr, false);
                        clk_mgr_base->clks.dtbclk_en = new_clocks->dtbclk_en;
                }
                /* check that we're not already in lower */

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index ee8453bf958fb8355abddb5e5a4556a167e40060..c1d8288a08b30bd8d6d966f3fb0be742b963a7e6 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -435,6 +435,7 @@ struct dc_config {
        unsigned int disable_ips;
        unsigned int disable_ips_in_vpb;
        bool usb4_bw_alloc_support;
+       bool allow_0_dtb_clk;
 };
 
 enum visual_confirm {