drm/amd/display: Remove PSR functions in Linux

NULL check issue found by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:1976
dc_link_setup_psr() warn: variable dereferenced before check 'link' (see
line 1970)

We don't use these functions so might as well remove them.
Signed-off-by: Harry Wentland <harry.wentland@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_link.c

@@ -1952,144 +1952,6 @@ bool dc_link_set_psr_enable(const struct dc_link *link, bool enable, bool wait)
 	return true;
 }
 
-bool dc_link_get_psr_state(const struct dc_link *link, uint32_t *psr_state)
-{
-	struct dc  *core_dc = link->ctx->dc;
-	struct dmcu *dmcu = core_dc->res_pool->dmcu;
-
-	if (dmcu != NULL && link->psr_enabled)
-		dmcu->funcs->get_psr_state(dmcu, psr_state);
-
-	return true;
-}
-
-bool dc_link_setup_psr(struct dc_link *link,
-		const struct dc_stream_state *stream, struct psr_config *psr_config,
-		struct psr_context *psr_context)
-{
-	struct dc  *core_dc = link->ctx->dc;
-	struct dmcu *dmcu = core_dc->res_pool->dmcu;
-	int i;
-
-	psr_context->controllerId = CONTROLLER_ID_UNDEFINED;
-
-	if (link != NULL &&
-		dmcu != NULL) {
-		/* updateSinkPsrDpcdConfig*/
-		union dpcd_psr_configuration psr_configuration;
-
-		memset(&psr_configuration, 0, sizeof(psr_configuration));
-
-		psr_configuration.bits.ENABLE                    = 1;
-		psr_configuration.bits.CRC_VERIFICATION          = 1;
-		psr_configuration.bits.FRAME_CAPTURE_INDICATION  =
-				psr_config->psr_frame_capture_indication_req;
-
-		/* Check for PSR v2*/
-		if (psr_config->psr_version == 0x2) {
-			/* For PSR v2 selective update.
-			 * Indicates whether sink should start capturing
-			 * immediately following active scan line,
-			 * or starting with the 2nd active scan line.
-			 */
-			psr_configuration.bits.LINE_CAPTURE_INDICATION = 0;
-			/*For PSR v2, determines whether Sink should generate
-			 * IRQ_HPD when CRC mismatch is detected.
-			 */
-			psr_configuration.bits.IRQ_HPD_WITH_CRC_ERROR    = 1;
-		}
-
-		dm_helpers_dp_write_dpcd(
-			link->ctx,
-			link,
-			368,
-			&psr_configuration.raw,
-			sizeof(psr_configuration.raw));
-
-		psr_context->channel = link->ddc->ddc_pin->hw_info.ddc_channel;
-		psr_context->transmitterId = link->link_enc->transmitter;
-		psr_context->engineId = link->link_enc->preferred_engine;
-
-		for (i = 0; i < MAX_PIPES; i++) {
-			if (core_dc->current_state->res_ctx.pipe_ctx[i].stream
-					== stream) {
-				/* dmcu -1 for all controller id values,
-				 * therefore +1 here
-				 */
-				psr_context->controllerId =
-					core_dc->current_state->res_ctx.
-					pipe_ctx[i].stream_res.tg->inst + 1;
-				break;
-			}
-		}
-
-		/* Hardcoded for now.  Can be Pcie or Uniphy (or Unknown)*/
-		psr_context->phyType = PHY_TYPE_UNIPHY;
-		/*PhyId is associated with the transmitter id*/
-		psr_context->smuPhyId = link->link_enc->transmitter;
-
-		psr_context->crtcTimingVerticalTotal = stream->timing.v_total;
-		psr_context->vsyncRateHz = div64_u64(div64_u64((stream->
-						timing.pix_clk_khz * 1000),
-						stream->timing.v_total),
-						stream->timing.h_total);
-
-		psr_context->psrSupportedDisplayConfig = true;
-		psr_context->psrExitLinkTrainingRequired =
-			psr_config->psr_exit_link_training_required;
-		psr_context->sdpTransmitLineNumDeadline =
-			psr_config->psr_sdp_transmit_line_num_deadline;
-		psr_context->psrFrameCaptureIndicationReq =
-			psr_config->psr_frame_capture_indication_req;
-
-		psr_context->skipPsrWaitForPllLock = 0; /* only = 1 in KV */
-
-		psr_context->numberOfControllers =
-				link->dc->res_pool->res_cap->num_timing_generator;
-
-		psr_context->rfb_update_auto_en = true;
-
-		/* 2 frames before enter PSR. */
-		psr_context->timehyst_frames = 2;
-		/* half a frame
-		 * (units in 100 lines, i.e. a value of 1 represents 100 lines)
-		 */
-		psr_context->hyst_lines = stream->timing.v_total / 2 / 100;
-		psr_context->aux_repeats = 10;
-
-		psr_context->psr_level.u32all = 0;
-
-#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
-		/*skip power down the single pipe since it blocks the cstate*/
-		if (ASIC_REV_IS_RAVEN(link->ctx->asic_id.hw_internal_rev))
-			psr_context->psr_level.bits.SKIP_CRTC_DISABLE = true;
-#endif
-
-		/* SMU will perform additional powerdown sequence.
-		 * For unsupported ASICs, set psr_level flag to skip PSR
-		 *  static screen notification to SMU.
-		 *  (Always set for DAL2, did not check ASIC)
-		 */
-		psr_context->psr_level.bits.SKIP_SMU_NOTIFICATION = 1;
-
-		/* Complete PSR entry before aborting to prevent intermittent
-		 * freezes on certain eDPs
-		 */
-		psr_context->psr_level.bits.DISABLE_PSR_ENTRY_ABORT = 1;
-
-		/* Controls additional delay after remote frame capture before
-		 * continuing power down, default = 0
-		 */
-		psr_context->frame_delay = 0;
-
-		link->psr_enabled = true;
-		dmcu->funcs->setup_psr(dmcu, link, psr_context);
-		return true;
-	} else
-		return false;
-
-}
-
 const struct dc_link_status *dc_link_get_status(const struct dc_link *link)
 {
 	return &link->link_status;