drm/amd/display: check actual clock value.

[Why]
Actual dpp/disp clock PMFW set are always equal or more than requested.
Need to cache the actual clock for debugging purpose.

[How]
Add actuall dpp/disp clk in clock manager and save it when set clocks.
Add an ASSERT in case of actual clock less than requested.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c
index 9a374522e963..ab2b9c61e565 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c
@@ -136,6 +136,10 @@ int rn_vbios_smu_set_dispclk(struct clk_mgr_internal *clk_mgr, int requested_dis
 		}
 	}
 
+	// pmfw always set clock more than or equal requested clock
+	if (!IS_DIAG_DC(dc->ctx->dce_environment))
+		ASSERT(actual_dispclk_set_mhz >= requested_dispclk_khz / 1000);
+
 	return actual_dispclk_set_mhz * 1000;
 }
 
@@ -194,12 +198,16 @@ void rn_vbios_smu_set_phyclk(struct clk_mgr_internal *clk_mgr, int requested_phy
 int rn_vbios_smu_set_dppclk(struct clk_mgr_internal *clk_mgr, int requested_dpp_khz)
 {
 	int actual_dppclk_set_mhz = -1;
+	struct dc *dc = clk_mgr->base.ctx->dc;
 
 	actual_dppclk_set_mhz = rn_vbios_smu_send_msg_with_param(
 			clk_mgr,
 			VBIOSSMC_MSG_SetDppclkFreq,
 			requested_dpp_khz / 1000);
 
+	if (!IS_DIAG_DC(dc->ctx->dce_environment))
+		ASSERT(actual_dppclk_set_mhz >= requested_dpp_khz / 1000);
+
 	return actual_dppclk_set_mhz * 1000;
 }