drm/amd/display: Add Read Histogram command header

[Why]
Read the histogram for VariBright validation

[How]
Add dc/dmub functions to read histogram and ACE

Reviewed-by: Jun Lei <jun.lei@amd.com>
Signed-off-by: Chun-Liang Chang <Chun-Liang.Chang@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 61 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
index ccc154b0281c..3b9011ef9b68 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
@@ -28,6 +28,8 @@
 #include "dc.h"
 #include "core_types.h"
 #include "dmub_cmd.h"
+#include "dc_dmub_srv.h"
+#include "dmub/dmub_srv.h"
 
 #define TO_DMUB_ABM(abm)\
 	container_of(abm, struct dce_abm, base)
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index 1f5f4e3e49d4..5e7c698f9bfb 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -4360,6 +4360,11 @@ enum dmub_cmd_abm_type {
 	 * Get the current ACE curve.
 	 */
 	DMUB_CMD__ABM_GET_ACE_CURVE = 10,
+
+	/**
+	 * Get current histogram data
+	 */
+	DMUB_CMD__ABM_GET_HISTOGRAM_DATA = 11,
 };
 
 struct abm_ace_curve {
@@ -4954,6 +4959,20 @@ enum dmub_abm_ace_curve_type {
 };
 
 /**
+ * enum dmub_abm_histogram_type - Histogram type.
+ */
+enum dmub_abm_histogram_type {
+	/**
+	 * ACE curve as defined by the SW layer.
+	 */
+	ABM_HISTOGRAM_TYPE__SW = 0,
+	/**
+	 * ACE curve as defined by the SW to HW translation interface layer.
+	 */
+	ABM_HISTOGRAM_TYPE__SW_IF = 1,
+};
+
+/**
  * Definition of a DMUB_CMD__ABM_GET_ACE_CURVE command.
  */
 struct dmub_rb_cmd_abm_get_ace_curve {
@@ -4989,6 +5008,41 @@ struct dmub_rb_cmd_abm_get_ace_curve {
 };
 
 /**
+ * Definition of a DMUB_CMD__ABM_GET_HISTOGRAM command.
+ */
+struct dmub_rb_cmd_abm_get_histogram {
+	/**
+	 * Command header.
+	 */
+	struct dmub_cmd_header header;
+
+	/**
+	 * Address where Histogram should be copied.
+	 */
+	union dmub_addr dest;
+
+	/**
+	 * Type of Histogram being queried.
+	 */
+	enum dmub_abm_histogram_type histogram_type;
+
+	/**
+	 * Indirect buffer length.
+	 */
+	uint16_t bytes;
+
+	/**
+	 * eDP panel instance.
+	 */
+	uint8_t panel_inst;
+
+	/**
+	 * Explicit padding to 4 byte boundary.
+	 */
+	uint8_t pad;
+};
+
+/**
  * Definition of a DMUB_CMD__ABM_SAVE_RESTORE command.
  */
 struct dmub_rb_cmd_abm_save_restore {
@@ -5687,6 +5741,11 @@ union dmub_rb_cmd {
 	struct dmub_rb_cmd_abm_get_ace_curve abm_get_ace_curve;
 
 	/**
+	 * Definition of a DMUB_CMD__ABM_GET_HISTOGRAM command.
+	 */
+	struct dmub_rb_cmd_abm_get_histogram abm_get_histogram;
+
+	/**
 	 * Definition of a DMUB_CMD__ABM_SET_EVENT command.
 	 */
 	struct dmub_rb_cmd_abm_set_event abm_set_event;