drm/amd/display: Add harvest IP support for Vega20

Retrieve fuses to determine the availability of pipes, and
eliminate pipes that cannot be used.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>

drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c

@@ -814,6 +814,213 @@ static void bw_calcs_data_update_from_pplib(struct dc *dc)
 	dm_pp_notify_wm_clock_changes(dc->ctx, &clk_ranges);
 }
 
+#ifdef CONFIG_DRM_AMD_DC_VG20
+static uint32_t read_pipe_fuses(struct dc_context *ctx)
+{
+	uint32_t value = dm_read_reg_soc15(ctx, mmCC_DC_PIPE_DIS, 0);
+	/* VG20 support max 6 pipes */
+	value = value & 0x3f;
+	return value;
+}
+
+static bool construct(
+	uint8_t num_virtual_links,
+	struct dc *dc,
+	struct dce110_resource_pool *pool)
+{
+	unsigned int i;
+	int j;
+	struct dc_context *ctx = dc->ctx;
+	struct irq_service_init_data irq_init_data;
+	bool harvest_enabled = ASICREV_IS_VEGA20_P(ctx->asic_id.hw_internal_rev);
+	uint32_t pipe_fuses;
+
+	ctx->dc_bios->regs = &bios_regs;
+
+	pool->base.res_cap = &res_cap;
+	pool->base.funcs = &dce120_res_pool_funcs;
+
+	/* TODO: Fill more data from GreenlandAsicCapability.cpp */
+	pool->base.pipe_count = res_cap.num_timing_generator;
+	pool->base.timing_generator_count = pool->base.res_cap->num_timing_generator;
+	pool->base.underlay_pipe_index = NO_UNDERLAY_PIPE;
+
+	dc->caps.max_downscale_ratio = 200;
+	dc->caps.i2c_speed_in_khz = 100;
+	dc->caps.max_cursor_size = 128;
+	dc->caps.dual_link_dvi = true;
+
+	dc->debug = debug_defaults;
+
+	/*************************************************
+	 *  Create resources                             *
+	 *************************************************/
+
+	pool->base.clock_sources[DCE120_CLK_SRC_PLL0] =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_COMBO_PHY_PLL0,
+				&clk_src_regs[0], false);
+	pool->base.clock_sources[DCE120_CLK_SRC_PLL1] =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_COMBO_PHY_PLL1,
+				&clk_src_regs[1], false);
+	pool->base.clock_sources[DCE120_CLK_SRC_PLL2] =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_COMBO_PHY_PLL2,
+				&clk_src_regs[2], false);
+	pool->base.clock_sources[DCE120_CLK_SRC_PLL3] =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_COMBO_PHY_PLL3,
+				&clk_src_regs[3], false);
+	pool->base.clock_sources[DCE120_CLK_SRC_PLL4] =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_COMBO_PHY_PLL4,
+				&clk_src_regs[4], false);
+	pool->base.clock_sources[DCE120_CLK_SRC_PLL5] =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_COMBO_PHY_PLL5,
+				&clk_src_regs[5], false);
+	pool->base.clk_src_count = DCE120_CLK_SRC_TOTAL;
+
+	pool->base.dp_clock_source =
+			dce120_clock_source_create(ctx, ctx->dc_bios,
+				CLOCK_SOURCE_ID_DP_DTO,
+				&clk_src_regs[0], true);
+
+	for (i = 0; i < pool->base.clk_src_count; i++) {
+		if (pool->base.clock_sources[i] == NULL) {
+			dm_error("DC: failed to create clock sources!\n");
+			BREAK_TO_DEBUGGER();
+			goto clk_src_create_fail;
+		}
+	}
+
+	pool->base.display_clock = dce120_disp_clk_create(ctx);
+	if (pool->base.display_clock == NULL) {
+		dm_error("DC: failed to create display clock!\n");
+		BREAK_TO_DEBUGGER();
+		goto disp_clk_create_fail;
+	}
+
+	pool->base.dmcu = dce_dmcu_create(ctx,
+			&dmcu_regs,
+			&dmcu_shift,
+			&dmcu_mask);
+	if (pool->base.dmcu == NULL) {
+		dm_error("DC: failed to create dmcu!\n");
+		BREAK_TO_DEBUGGER();
+		goto res_create_fail;
+	}
+
+	pool->base.abm = dce_abm_create(ctx,
+			&abm_regs,
+			&abm_shift,
+			&abm_mask);
+	if (pool->base.abm == NULL) {
+		dm_error("DC: failed to create abm!\n");
+		BREAK_TO_DEBUGGER();
+		goto res_create_fail;
+	}
+
+	irq_init_data.ctx = dc->ctx;
+	pool->base.irqs = dal_irq_service_dce120_create(&irq_init_data);
+	if (!pool->base.irqs)
+		goto irqs_create_fail;
+
+	/* retrieve valid pipe fuses */
+	if (harvest_enabled)
+		pipe_fuses = read_pipe_fuses(ctx);
+
+	/* index to valid pipe resource */
+	j = 0;
+	for (i = 0; i < pool->base.pipe_count; i++) {
+		if (harvest_enabled) {
+			if ((pipe_fuses & (1 << i)) != 0) {
+				dm_error("DC: skip invalid pipe %d!\n", i);
+				continue;
+			}
+		}
+
+		pool->base.timing_generators[j] =
+				dce120_timing_generator_create(
+					ctx,
+					i,
+					&dce120_tg_offsets[i]);
+		if (pool->base.timing_generators[j] == NULL) {
+			BREAK_TO_DEBUGGER();
+			dm_error("DC: failed to create tg!\n");
+			goto controller_create_fail;
+		}
+
+		pool->base.mis[j] = dce120_mem_input_create(ctx, i);
+
+		if (pool->base.mis[j] == NULL) {
+			BREAK_TO_DEBUGGER();
+			dm_error(
+				"DC: failed to create memory input!\n");
+			goto controller_create_fail;
+		}
+
+		pool->base.ipps[j] = dce120_ipp_create(ctx, i);
+		if (pool->base.ipps[i] == NULL) {
+			BREAK_TO_DEBUGGER();
+			dm_error(
+				"DC: failed to create input pixel processor!\n");
+			goto controller_create_fail;
+		}
+
+		pool->base.transforms[j] = dce120_transform_create(ctx, i);
+		if (pool->base.transforms[i] == NULL) {
+			BREAK_TO_DEBUGGER();
+			dm_error(
+				"DC: failed to create transform!\n");
+			goto res_create_fail;
+		}
+
+		pool->base.opps[j] = dce120_opp_create(
+			ctx,
+			i);
+		if (pool->base.opps[j] == NULL) {
+			BREAK_TO_DEBUGGER();
+			dm_error(
+				"DC: failed to create output pixel processor!\n");
+		}
+
+		/* check next valid pipe */
+		j++;
+	}
+
+	/* valid pipe num */
+	pool->base.pipe_count = j;
+	pool->base.timing_generator_count = j;
+
+	if (!resource_construct(num_virtual_links, dc, &pool->base,
+			 &res_create_funcs))
+		goto res_create_fail;
+
+	/* Create hardware sequencer */
+	if (!dce120_hw_sequencer_create(dc))
+		goto controller_create_fail;
+
+	dc->caps.max_planes =  pool->base.pipe_count;
+
+	bw_calcs_init(dc->bw_dceip, dc->bw_vbios, dc->ctx->asic_id);
+
+	bw_calcs_data_update_from_pplib(dc);
+
+	return true;
+
+irqs_create_fail:
+controller_create_fail:
+disp_clk_create_fail:
+clk_src_create_fail:
+res_create_fail:
+
+	destruct(pool);
+
+	return false;
+}
+#else
 static bool construct(
 	uint8_t num_virtual_links,
 	struct dc *dc,
@@ -988,6 +1195,7 @@ res_create_fail:
 
 	return false;
 }
+#endif
 
 struct resource_pool *dce120_create_resource_pool(
 	uint8_t num_virtual_links,