drm/amd/display: Add more DC HW state info to underflow logging

[Why]
Debugging underflow issues frequently requires knowing the
HW state at the time of underflow. To enable capturing this
HW state information, interface functions are needed for the
various DC HW blocks.

[How]
This change adds the interface functions to read HW state for
the following DC HW blocks:
- HUBBUB
- HUBP
- DPP
- MPC
- OPP
- DSC
- OPTC
- DCCG

Reviewed-by: George Shen <george.shen@amd.com>
Signed-off-by: Karen Chen <Karen.Chen@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h b/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h
index 747679cb4944..e1428a83ecbc 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/opp.h
@@ -297,6 +297,16 @@ struct oppbuf_params {
 	uint32_t num_segment_padded_pixels;
 };
 
+struct dcn_opp_reg_state {
+	uint32_t dpg_control;
+	uint32_t fmt_control;
+	uint32_t oppbuf_control;
+	uint32_t opp_pipe_control;
+	uint32_t opp_pipe_crc_control;
+	uint32_t opp_abm_control;
+	uint32_t dscrm_dsc_forward_config;
+};
+
 struct opp_funcs {
 
 
@@ -368,6 +378,9 @@ struct opp_funcs {
 			struct output_pixel_processor *opp,
 			enum dc_pixel_encoding pixel_encoding,
 			bool is_primary);
+
+	void (*opp_read_reg_state)(
+			struct output_pixel_processor *opp, struct dcn_opp_reg_state *opp_reg_state);
 };
 
 #endif