drm/amd/display: Log link/connector info provided in BIOS object table

[Why/How]
Add logging statements to assist in debugging
errors in the BIOS object table.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Anson Jacob <anson.jacob@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -175,6 +175,8 @@ static bool create_links(
 
 	connectors_num = bios->funcs->get_connectors_number(bios);
 
+	DC_LOG_DC("BIOS object table - number of connectors: %d", connectors_num);
+
 	if (connectors_num > ENUM_ID_COUNT) {
 		dm_error(
 			"DC: Number of connectors %d exceeds maximum of %d!\n",
@@ -193,6 +195,8 @@ static bool create_links(
 		struct link_init_data link_init_params = {0};
 		struct dc_link *link;
 
+		DC_LOG_DC("BIOS object table - printing link object info for connector number: %d, link_index: %d", i, dc->link_count);
+
 		link_init_params.ctx = dc->ctx;
 		/* next BIOS object table connector */
 		link_init_params.connector_index = i;
@@ -225,6 +229,8 @@ static bool create_links(
 		}
 	}
 
+	DC_LOG_DC("BIOS object table - end");
+
 	for (i = 0; i < num_virtual_links; i++) {
 		struct dc_link *link = kzalloc(sizeof(*link), GFP_KERNEL);
 		struct encoder_init_data enc_init = {0};

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

@@ -1401,10 +1401,12 @@ static bool dc_link_construct(struct dc_link *link,
 	link->link_id =
 		bios->funcs->get_connector_id(bios, init_params->connector_index);
 
+	DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id);
 
 	if (bios->funcs->get_disp_connector_caps_info) {
 		bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info);
 		link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY;
+		DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display);
 	}
 
 	if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
@@ -1419,10 +1421,14 @@ static bool dc_link_construct(struct dc_link *link,
 
 	link->hpd_gpio = get_hpd_gpio(link->ctx->dc_bios, link->link_id,
 				      link->ctx->gpio_service);
+
 	if (link->hpd_gpio) {
 		dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT);
 		dal_gpio_unlock_pin(link->hpd_gpio);
 		link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio);
+
+		DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id);
+		DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en);
 	}
 
 	switch (link->link_id.id) {
@@ -1519,6 +1525,8 @@ static bool dc_link_construct(struct dc_link *link,
 	link->link_enc =
 		link->dc->res_pool->funcs->link_enc_create(&enc_init_data);
 
+	DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
+
 	if (!link->link_enc) {
 		DC_ERROR("Failed to create link encoder!\n");
 		goto link_enc_create_fail;
@@ -1546,6 +1554,10 @@ static bool dc_link_construct(struct dc_link *link,
 		if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD &&
 		    link->connector_signal == SIGNAL_TYPE_RGB)
 			continue;
+
+		DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device);
+		DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type);
+		DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id);
 		break;
 	}
 
@@ -1564,10 +1576,14 @@ static bool dc_link_construct(struct dc_link *link,
 			    path->device_acpi_enum == link->device_tag.acpi_device) {
 				link->ddi_channel_mapping = path->channel_mapping;
 				link->chip_caps = path->caps;
+				DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw);
+				DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps);
 			} else if (path->device_tag ==
 				   link->device_tag.dev_id.raw_device_tag) {
 				link->ddi_channel_mapping = path->channel_mapping;
 				link->chip_caps = path->caps;
+				DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw);
+				DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps);
 			}
 			break;
 		}
@@ -1586,6 +1602,7 @@ static bool dc_link_construct(struct dc_link *link,
 
 	link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
 
+	DC_LOG_DC("BIOS object table - dc_link_contruct finished successfully.\n");
 	return true;
 device_tag_fail:
 	link->link_enc->funcs->destroy(&link->link_enc);
@@ -1602,6 +1619,7 @@ static bool dc_link_construct(struct dc_link *link,
 		link->hpd_gpio = NULL;
 	}
 
+	DC_LOG_DC("BIOS object table - dc_link_contruct failed.\n");
 	kfree(info);
 
 	return false;

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

@@ -37,6 +37,8 @@
 #include "dc_link_ddc.h"
 #include "dce/dce_aux.h"
 
+#define DC_LOGGER_INIT(logger)
+
 /*DP to Dual link DVI converter*/
 static const uint8_t DP_DVI_CONVERTER_ID_4[] = "m2DVIa";
 static const uint8_t DP_DVI_CONVERTER_ID_5[] = "3393N2";
@@ -194,6 +196,10 @@ static void ddc_service_construct(
 	if (BP_RESULT_OK != dcb->funcs->get_i2c_info(dcb, init_data->id, &i2c_info)) {
 		ddc_service->ddc_pin = NULL;
 	} else {
+		DC_LOGGER_INIT(ddc_service->ctx->logger);
+		DC_LOG_DC("BIOS object table - i2c_line: %d", i2c_info.i2c_line);
+		DC_LOG_DC("BIOS object table - i2c_engine_id: %d", i2c_info.i2c_engine_id);
+
 		hw_info.ddc_channel = i2c_info.i2c_line;
 		if (ddc_service->link != NULL)
 			hw_info.hw_supported = i2c_info.i2c_hw_assist;