drm/amd/display: Add dpia debug options

[Why & How]
To add support for dpia debug options.
Reviewed-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc.h

@@ -496,6 +496,14 @@ union root_clock_optimization_options {
 	uint32_t u32All;
 };
 
+union dpia_debug_options {
+	struct {
+		uint32_t disable_dpia:1;
+		uint32_t reserved:31;
+	} bits;
+	uint32_t raw;
+};
+
 struct dc_debug_data {
 	uint32_t ltFailCount;
 	uint32_t i2cErrorCount;
@@ -668,6 +676,7 @@ struct dc_debug_options {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	bool disable_z10;
 	bool enable_sw_cntl_psr;
+	union dpia_debug_options dpia_debug;
 #endif
 };
 

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c

@@ -2428,7 +2428,8 @@ static bool dcn31_resource_construct(
 	}
 
 	if (dc->ctx->asic_id.chip_family == FAMILY_YELLOW_CARP &&
-	    dc->ctx->asic_id.hw_internal_rev == YELLOW_CARP_B0) {
+	    dc->ctx->asic_id.hw_internal_rev == YELLOW_CARP_B0 &&
+	    !dc->debug.dpia_debug.bits.disable_dpia) {
 		/* YELLOW CARP B0 has 4 DPIA's */
 		pool->base.usb4_dpia_count = 4;
 	}

drivers/gpu/drm/amd/display/dmub/dmub_srv.h

@@ -237,6 +237,7 @@ struct dmub_srv_hw_params {
 	bool load_inst_const;
 	bool skip_panel_power_sequence;
 	bool disable_z10;
+	bool disable_dpia;
 };
 
 /**

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

@@ -368,8 +368,7 @@ union dmub_fw_boot_options {
 		uint32_t disable_clk_gate: 1; /**< 1 if clock gating should be disabled */
 		uint32_t skip_phy_init_panel_sequence: 1; /**< 1 to skip panel init seq */
 		uint32_t z10_disable: 1; /**< 1 to disable z10 */
-		uint32_t reserved2: 1; /**< reserved for an unreleased feature */
-		uint32_t reserved_unreleased1: 1; /**< reserved for an unreleased feature */
+		uint32_t enable_dpia: 1; /**< 1 if DPIA should be enabled */
 		uint32_t invalid_vbios_data: 1; /**< 1 if VBIOS data table is invalid */
 		uint32_t reserved_unreleased2: 1; /**< reserved for an unreleased feature */
 		uint32_t reserved : 22; /**< reserved */

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c

@@ -338,6 +338,7 @@ void dmub_dcn31_enable_dmub_boot_options(struct dmub_srv *dmub, const struct dmu
 	union dmub_fw_boot_options boot_options = {0};
 
 	boot_options.bits.z10_disable = params->disable_z10;
+	boot_options.bits.enable_dpia = params->disable_dpia ? 0 : 1;
 
 	REG_WRITE(DMCUB_SCRATCH14, boot_options.all);
 }