drm/amd/display: Log Hard Min Clocks and Phantom Pipe Status

[WHY]
On entering/exiting idle power, certain parameters would be
very useful to know for power profiling purposes.

[HOW]
This commit adds certain hard min clocks and pipe types
to log output on idle optimization enter/exit.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Sung Lee <Sung.Lee@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Sung Lee

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn401/dcn401_clk_mgr.c

@@ -1345,6 +1345,20 @@ static void dcn401_set_hard_min_memclk(struct clk_mgr *clk_mgr_base, bool curren
 	dcn401_execute_block_sequence(clk_mgr_base,	num_steps);
 }
 
+static int dcn401_get_hard_min_memclk(struct clk_mgr *clk_mgr_base)
+{
+	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+
+	return clk_mgr->base.ctx->dc->current_state->bw_ctx.bw.dcn.clk.dramclk_khz;
+}
+
+static int dcn401_get_hard_min_fclk(struct clk_mgr *clk_mgr_base)
+{
+	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+
+	return clk_mgr->base.ctx->dc->current_state->bw_ctx.bw.dcn.clk.fclk_khz;
+}
+
 /* Get current memclk states, update bounding box */
 static void dcn401_get_memclk_states_from_smu(struct clk_mgr *clk_mgr_base)
 {
@@ -1478,6 +1492,8 @@ static struct clk_mgr_funcs dcn401_funcs = {
 		.enable_pme_wa = dcn401_enable_pme_wa,
 		.is_smu_present = dcn401_is_smu_present,
 		.get_dispclk_from_dentist = dcn401_get_dispclk_from_dentist,
+		.get_hard_min_memclk = dcn401_get_hard_min_memclk,
+		.get_hard_min_fclk = dcn401_get_hard_min_fclk,
 };
 
 struct clk_mgr_internal *dcn401_clk_mgr_construct(

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -5507,6 +5507,11 @@ bool dc_set_ips_disable(struct dc *dc, unsigned int disable_ips)
 
 void dc_allow_idle_optimizations_internal(struct dc *dc, bool allow, char const *caller_name)
 {
+	int idle_fclk_khz = 0, idle_dramclk_khz = 0, i = 0;
+	enum mall_stream_type subvp_pipe_type[MAX_PIPES] = {0};
+	struct pipe_ctx *pipe = NULL;
+	struct dc_state *context = dc->current_state;
+
 	if (dc->debug.disable_idle_power_optimizations) {
 		DC_LOG_DEBUG("%s: disabled\n", __func__);
 		return;
@@ -5531,6 +5536,23 @@ void dc_allow_idle_optimizations_internal(struct dc *dc, bool allow, char const
 		dc->idle_optimizations_allowed = allow;
 		DC_LOG_DEBUG("%s: %s\n", __func__, allow ? "enabled" : "disabled");
 	}
+
+	// log idle clocks and sub vp pipe types at idle optimization time
+	if (dc->clk_mgr != NULL && dc->clk_mgr->funcs->get_hard_min_fclk)
+		idle_fclk_khz = dc->clk_mgr->funcs->get_hard_min_fclk(dc->clk_mgr);
+
+	if (dc->clk_mgr != NULL && dc->clk_mgr->funcs->get_hard_min_memclk)
+		idle_dramclk_khz = dc->clk_mgr->funcs->get_hard_min_memclk(dc->clk_mgr);
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		pipe = &context->res_ctx.pipe_ctx[i];
+		subvp_pipe_type[i] = dc_state_get_pipe_subvp_type(context, pipe);
+	}
+
+	DC_LOG_DC("%s: allow_idle=%d\n HardMinUClk_Khz=%d HardMinDramclk_Khz=%d\n Pipe_0=%d Pipe_1=%d Pipe_2=%d Pipe_3=%d Pipe_4=%d Pipe_5=%d (caller=%s)\n",
+			__func__, allow, idle_fclk_khz, idle_dramclk_khz, subvp_pipe_type[0], subvp_pipe_type[1], subvp_pipe_type[2],
+			subvp_pipe_type[3], subvp_pipe_type[4], subvp_pipe_type[5], caller_name);
+
 }
 
 void dc_exit_ips_for_hw_access_internal(struct dc *dc, const char *caller_name)

drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h

@@ -306,6 +306,9 @@ struct clk_mgr_funcs {
 	 */
 	void (*set_hard_min_memclk)(struct clk_mgr *clk_mgr, bool current_mode);
 
+	int (*get_hard_min_memclk)(struct clk_mgr *clk_mgr);
+	int (*get_hard_min_fclk)(struct clk_mgr *clk_mgr);
+
 	/* Send message to PMFW to set hard max memclk frequency to highest DPM */
 	void (*set_hard_max_memclk)(struct clk_mgr *clk_mgr);