drm/amd/display: Add debug flag to enable eDP ILR by default

[Why & How]
Allow per-asic enablement of ILR feature with debug flag
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Acked-by: Bindu Ramamurthy <bindur12@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -3892,7 +3892,7 @@ void detect_edp_sink_caps(struct dc_link *link)
 	memset(supported_link_rates, 0, sizeof(supported_link_rates));
 
 	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14 &&
-			(link->dc->config.optimize_edp_link_rate ||
+			(link->dc->debug.optimize_edp_link_rate ||
 			link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN)) {
 		// Read DPCD 00010h - 0001Fh 16 bytes at one shot
 		core_link_read_dpcd(link, DP_SUPPORTED_LINK_RATES,

drivers/gpu/drm/amd/display/dc/dc.h

@@ -293,7 +293,6 @@ struct dc_config {
 	bool gpu_vm_support;
 	bool disable_disp_pll_sharing;
 	bool fbc_support;
-	bool optimize_edp_link_rate;
 	bool disable_fractional_pwm;
 	bool allow_seamless_boot_optimization;
 	bool power_down_display_on_boot;
@@ -541,6 +540,7 @@ struct dc_debug_options {
 
 	/* Enable dmub aux for legacy ddc */
 	bool enable_dmub_aux_for_legacy_ddc;
+	bool optimize_edp_link_rate; /* eDP ILR */
 };
 
 struct dc_debug_data {