From 666fc600b2b74d3da0e9a22f897addccc3b6ed27 Mon Sep 17 00:00:00 2001
From: jsg <jsg@openbsd.org>
Date: Fri, 4 Aug 2023 08:20:08 +0000
Subject: [PATCH] drm/amd: Align SMU11 SMU_MSG_OverridePcieParameters
 implementation with SMU13

From Mario Limonciello
6e385845eea187c573949e31e21d6934af1f3415 in linux-6.1.y/6.1.43
e701156ccc6c7a5f104a968dda74cd6434178712 in mainline linux
---
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   | 91 ++++---------------
 1 file changed, 18 insertions(+), 73 deletions(-)

diff --git a/sys/dev/pci/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/sys/dev/pci/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index 9e56f7f874f..a42dc02029d 100644
--- a/sys/dev/pci/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/sys/dev/pci/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -2081,91 +2081,36 @@ static int sienna_cichlid_display_disable_memory_clock_switch(struct smu_context
 	return ret;
 }
 
-static void sienna_cichlid_get_override_pcie_settings(struct smu_context *smu,
-						      uint32_t *gen_speed_override,
-						      uint32_t *lane_width_override)
-{
-	struct amdgpu_device *adev = smu->adev;
-
-	*gen_speed_override = 0xff;
-	*lane_width_override = 0xff;
-
-	switch (adev->pdev->device) {
-	case 0x73A0:
-	case 0x73A1:
-	case 0x73A2:
-	case 0x73A3:
-	case 0x73AB:
-	case 0x73AE:
-		/* Bit 7:0: PCIE lane width, 1 to 7 corresponds is x1 to x32 */
-		*lane_width_override = 6;
-		break;
-	case 0x73E0:
-	case 0x73E1:
-	case 0x73E3:
-		*lane_width_override = 4;
-		break;
-	case 0x7420:
-	case 0x7421:
-	case 0x7422:
-	case 0x7423:
-	case 0x7424:
-		*lane_width_override = 3;
-		break;
-	default:
-		break;
-	}
-}
-
-#ifndef MAX
-#define MAX(a, b)	((a) > (b) ? (a) : (b))
-#endif
-
 static int sienna_cichlid_update_pcie_parameters(struct smu_context *smu,
 					 uint32_t pcie_gen_cap,
 					 uint32_t pcie_width_cap)
 {
 	struct smu_11_0_dpm_context *dpm_context = smu->smu_dpm.dpm_context;
 	struct smu_11_0_pcie_table *pcie_table = &dpm_context->dpm_tables.pcie_table;
-	uint32_t gen_speed_override, lane_width_override;
-	uint8_t *table_member1, *table_member2;
-	uint32_t min_gen_speed, max_gen_speed;
-	uint32_t min_lane_width, max_lane_width;
-	uint32_t smu_pcie_arg;
+	u32 smu_pcie_arg;
 	int ret, i;
 
-	GET_PPTABLE_MEMBER(PcieGenSpeed, &table_member1);
-	GET_PPTABLE_MEMBER(PcieLaneCount, &table_member2);
+	/* PCIE gen speed and lane width override */
+	if (!amdgpu_device_pcie_dynamic_switching_supported()) {
+		if (pcie_table->pcie_gen[NUM_LINK_LEVELS - 1] < pcie_gen_cap)
+			pcie_gen_cap = pcie_table->pcie_gen[NUM_LINK_LEVELS - 1];
 
-	sienna_cichlid_get_override_pcie_settings(smu,
-						  &gen_speed_override,
-						  &lane_width_override);
+		if (pcie_table->pcie_lane[NUM_LINK_LEVELS - 1] < pcie_width_cap)
+			pcie_width_cap = pcie_table->pcie_lane[NUM_LINK_LEVELS - 1];
 
-	/* PCIE gen speed override */
-	if (gen_speed_override != 0xff) {
-		min_gen_speed = MIN(pcie_gen_cap, gen_speed_override);
-		max_gen_speed = MIN(pcie_gen_cap, gen_speed_override);
-	} else {
-		min_gen_speed = MAX(0, table_member1[0]);
-		max_gen_speed = MIN(pcie_gen_cap, table_member1[1]);
-		min_gen_speed = min_gen_speed > max_gen_speed ?
-				max_gen_speed : min_gen_speed;
-	}
-	pcie_table->pcie_gen[0] = min_gen_speed;
-	pcie_table->pcie_gen[1] = max_gen_speed;
-
-	/* PCIE lane width override */
-	if (lane_width_override != 0xff) {
-		min_lane_width = MIN(pcie_width_cap, lane_width_override);
-		max_lane_width = MIN(pcie_width_cap, lane_width_override);
+		/* Force all levels to use the same settings */
+		for (i = 0; i < NUM_LINK_LEVELS; i++) {
+			pcie_table->pcie_gen[i] = pcie_gen_cap;
+			pcie_table->pcie_lane[i] = pcie_width_cap;
+		}
 	} else {
-		min_lane_width = MAX(1, table_member2[0]);
-		max_lane_width = MIN(pcie_width_cap, table_member2[1]);
-		min_lane_width = min_lane_width > max_lane_width ?
-				 max_lane_width : min_lane_width;
+		for (i = 0; i < NUM_LINK_LEVELS; i++) {
+			if (pcie_table->pcie_gen[i] > pcie_gen_cap)
+				pcie_table->pcie_gen[i] = pcie_gen_cap;
+			if (pcie_table->pcie_lane[i] > pcie_width_cap)
+				pcie_table->pcie_lane[i] = pcie_width_cap;
+		}
 	}
-	pcie_table->pcie_lane[0] = min_lane_width;
-	pcie_table->pcie_lane[1] = max_lane_width;
 
 	for (i = 0; i < NUM_LINK_LEVELS; i++) {
 		smu_pcie_arg = (i << 16 |
-- 
2.20.1