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Author SHA1 Message Date
Andy Nguyen
5b0dc56c1b linux: fix cu unlock patches 2026-05-30 21:47:59 +02:00

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@@ -1328,7 +1328,7 @@ index 321310ba2c08..764da52902ac 100644
header = (const struct common_firmware_header *)
adev->sdma.instance[instance].fw->data;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 8b60299b73ef..0a3ad54066d6 100644
index 8b60299b73ef..7ecf928cae8e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -4202,6 +4202,14 @@ static void gfx_v10_0_check_gfxoff_flag(struct amdgpu_device *adev)
@@ -1406,7 +1406,7 @@ index 8b60299b73ef..0a3ad54066d6 100644
amdgpu_gfx_cp_init_microcode(adev, AMDGPU_UCODE_ID_CP_MEC2);
amdgpu_gfx_cp_init_microcode(adev, AMDGPU_UCODE_ID_CP_MEC2_JT);
} else {
@@ -10104,6 +10130,24 @@ static u32 gfx_v10_0_get_cu_active_bitmap_per_sh(struct amdgpu_device *adev)
@@ -10104,6 +10130,21 @@ static u32 gfx_v10_0_get_cu_active_bitmap_per_sh(struct amdgpu_device *adev)
return cu_active_bitmap;
}
@@ -1420,27 +1420,22 @@ index 8b60299b73ef..0a3ad54066d6 100644
+ * amdgpu.ps5_cu_unlock=0 (disable)
+ * amdgpu.ps5_cu_unlock=1 (probe)
+ */
+static int ps5_cu_unlock = 3;
+static int ps5_cu_unlock = 0;
+module_param(ps5_cu_unlock, int, 0444);
+MODULE_PARM_DESC(ps5_cu_unlock,
+ "PS5 harvested-CU unlock (0=off, 1=probe, 2=SE0/SH0, 3=all (default), 4=probe-all)");
+
+// PCI device ID of the silicon this unlock applies to.
+#define PS5_PCI_DEVID_RETAIL 0x13FB
+ "PS5 harvested-CU unlock (0=off (default), 1=probe, 2=SE0/SH0, 3=all, 4=probe-all)");
+
static int gfx_v10_0_get_cu_info(struct amdgpu_device *adev,
struct amdgpu_cu_info *cu_info)
{
@@ -10117,6 +10161,45 @@ static int gfx_v10_0_get_cu_info(struct amdgpu_device *adev,
@@ -10117,6 +10158,43 @@ static int gfx_v10_0_get_cu_info(struct amdgpu_device *adev,
amdgpu_gfx_parse_disable_cu(adev, disable_masks, 4, 2);
mutex_lock(&adev->grbm_idx_mutex);
+ /* PS5: unlock harvested CUs. CC alone updates enumeration but SPI
+ * still dispatches only to enabled WGPs; both writes are required
+ * (verified empirically on BC-250). */
+ if (ps5_cu_unlock > 0 &&
+ adev->pdev->vendor == PCI_VENDOR_ID_ATI &&
+ adev->pdev->device == PS5_PCI_DEVID_RETAIL) {
+ if (ps5_cu_unlock > 0) {
+ int ps5_se, ps5_sh;
+ for (ps5_se = 0; ps5_se < adev->gfx.config.max_shader_engines; ps5_se++) {
+ for (ps5_sh = 0; ps5_sh < adev->gfx.config.max_sh_per_se; ps5_sh++) {