drm/amd/display: Remove unused read_ono_state function from Hwss module

[Why]
The functions read_ono_state are no longer in use and have been identified
as redundant.
Removing them helps streamline the codebase and improve maintainability by
eliminating unnecessary code.

[How]
These unused functions were removed from Hwss module, ensuring that no
functionality is affected, and the code is simplified.

Reviewed-by: Martin Leung <martin.leung@amd.com>
Signed-off-by: Karthi Kandasamy <karthi.kandasamy@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Karthi Kandasamy

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

@@ -127,91 +127,6 @@ void dcn401_program_gamut_remap(struct pipe_ctx *pipe_ctx)
 	mpc->funcs->set_gamut_remap(mpc, mpcc_id, &mpc_adjust);
 }
 
-struct ips_ono_region_state dcn401_read_ono_state(struct dc *dc, uint8_t region)
-{
-	struct dce_hwseq *hws = dc->hwseq;
-	struct ips_ono_region_state state = {0, 0};
-
-	switch (region) {
-	case 0:
-		/* dccg, dio, dcio */
-		REG_GET_2(DOMAIN22_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 1:
-		/* dchubbub, dchvm, dchubbubmem */
-		REG_GET_2(DOMAIN23_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 2:
-		/* mpc, opp, optc, dwb */
-		REG_GET_2(DOMAIN24_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 3:
-		/* hpo */
-		REG_GET_2(DOMAIN25_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 4:
-		/* dchubp0, dpp0 */
-		REG_GET_2(DOMAIN0_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 5:
-		/* dsc0 */
-		REG_GET_2(DOMAIN16_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 6:
-		/* dchubp1, dpp1 */
-		REG_GET_2(DOMAIN1_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 7:
-		/* dsc1 */
-		REG_GET_2(DOMAIN17_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 8:
-		/* dchubp2, dpp2 */
-		REG_GET_2(DOMAIN2_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 9:
-		/* dsc2 */
-		REG_GET_2(DOMAIN18_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 10:
-		/* dchubp3, dpp3 */
-		REG_GET_2(DOMAIN3_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	case 11:
-		/* dsc3 */
-		REG_GET_2(DOMAIN19_PG_STATUS,
-			DOMAIN_DESIRED_PWR_STATE, &state.desire_pwr_state,
-			DOMAIN_PGFSM_PWR_STATUS, &state.current_pwr_state);
-		break;
-	default:
-		break;
-	}
-
-	return state;
-}
-
 void dcn401_init_hw(struct dc *dc)
 {
 	struct abm **abms = dc->res_pool->multiple_abms;

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.h

@@ -63,8 +63,6 @@ void dcn401_set_cursor_position(struct pipe_ctx *pipe_ctx);
 
 bool dcn401_apply_idle_power_optimizations(struct dc *dc, bool enable);
 
-struct ips_ono_region_state dcn401_read_ono_state(struct dc *dc,
-						  uint8_t region);
 void dcn401_wait_for_dcc_meta_propagation(const struct dc *dc,
 		const struct pipe_ctx *top_pipe_to_program);