drm/amd/display: provide an interface to query firmware version

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -39,6 +39,7 @@
 #include "bios_parser_interface.h"
 #include "include/irq_service_interface.h"
 #include "transform.h"
+#include "dmcu.h"
 #include "dpp.h"
 #include "timing_generator.h"
 #include "virtual/virtual_link_encoder.h"
@@ -609,6 +610,12 @@ struct dc *dc_create(const struct dc_init_data *init_params)
 	dc->caps.max_audios = dc->res_pool->audio_count;
 	dc->caps.linear_pitch_alignment = 64;
 
+	/* Populate versioning information */
+	dc->versions.dc_ver = DC_VER;
+
+	if (dc->res_pool->dmcu != NULL)
+		dc->versions.dmcu_version = dc->res_pool->dmcu->dmcu_version;
+
 	dc->config = init_params->flags;
 
 	dm_logger_write(dc->ctx->logger, LOG_DC,

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

@@ -48,6 +48,18 @@
 /*******************************************************************************
  * Display Core Interfaces
  ******************************************************************************/
+struct dmcu_version {
+	unsigned int date;
+	unsigned int month;
+	unsigned int year;
+	unsigned int interface_version;
+};
+
+struct dc_versions {
+	const char *dc_ver;
+	struct dmcu_version dmcu_version;
+};
+
 struct dc_caps {
 	uint32_t max_streams;
 	uint32_t max_links;
@@ -221,6 +233,7 @@ struct dc_state;
 struct resource_pool;
 struct dce_hwseq;
 struct dc {
+	struct dc_versions versions;
 	struct dc_caps caps;
 	struct dc_cap_funcs cap_funcs;
 	struct dc_config config;

drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c

@@ -360,7 +360,7 @@ static void dcn10_get_dmcu_version(struct dmcu *dmcu)
 	dmcu->dmcu_version.year = ((REG_READ(DMCU_IRAM_RD_DATA) << 8) |
 						REG_READ(DMCU_IRAM_RD_DATA));
 	dmcu->dmcu_version.month = REG_READ(DMCU_IRAM_RD_DATA);
-	dmcu->dmcu_version.day = REG_READ(DMCU_IRAM_RD_DATA);
+	dmcu->dmcu_version.date = REG_READ(DMCU_IRAM_RD_DATA);
 
 	/* Disable write access to IRAM to allow dynamic sleep state */
 	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,

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

@@ -32,13 +32,6 @@ enum dmcu_state {
 	DMCU_RUNNING = 1
 };
 
-struct dmcu_version {
-	unsigned int day;
-	unsigned int month;
-	unsigned int year;
-	unsigned int interface_version;
-};
-
 struct dmcu {
 	struct dc_context *ctx;
 	const struct dmcu_funcs *funcs;