[PATCH 4/4] drm/amdgpu: Access the FRU on Aldebaran

[Chen, Guchun]

[Public]

BTW, does FRU exists on all the Aldebaran SKUs?

This patch acks FRU's presence when it's Aldebaran. So if some Aldebaran SKUs do not have a FRU, some i2c access failures will be observed during boot up. This is not friendly to user.

Please check Vega20 case we talked before, and there are some more strict checks for FRU on several Vega20 SKUs.

case CHIP_VEGA20:
		/* D161 and D163 are the VG20 server SKUs */
		if (strnstr(atom_ctx->vbios_version, "D161",
			    sizeof(atom_ctx->vbios_version)) ||
		    strnstr(atom_ctx->vbios_version, "D163",
			    sizeof(atom_ctx->vbios_version)))
			return true;
		else
			return false;

Regards,
Guchun

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Chen, Guchun
Sent: Tuesday, December 14, 2021 11:17 AM
To: Russell, Kent <Kent.Russell at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Russell, Kent <Kent.Russell at amd.com>
Subject: RE: [PATCH 4/4] drm/amdgpu: Access the FRU on Aldebaran

[Public]

+	if (adev->asic_type == CHIP_ALDEBARAN)
+		offset = 0;
 
 	if (!is_fru_eeprom_supported(adev))
 		return 0;

I assume the logic should be adjusted. It's better to put the asic_type check after is_fru_eeprom_supported.

Regards,
Guchun

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Kent Russell
Sent: Tuesday, December 14, 2021 3:34 AM
To: amd-gfx at lists.freedesktop.org
Cc: Russell, Kent <Kent.Russell at amd.com>
Subject: [PATCH 4/4] drm/amdgpu: Access the FRU on Aldebaran

This is supported, although the offset is different from VG20, so fix that with a variable and enable getting the product name and serial number from the FRU.

Signed-off-by: Kent Russell <kent.russell at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
index b3b951fe0861..124376b666fd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
@@ -56,6 +56,8 @@ static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
 			return true;
 		else
 			return false;
+	case CHIP_ALDEBARAN:
+		return true;
 	default:
 		return false;
 	}
@@ -91,6 +93,10 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 	unsigned char buff[66];
 	u32 addrptr;
 	int size, len;
+	int offset = 2;
+
+	if (adev->asic_type == CHIP_ALDEBARAN)
+		offset = 0;
 
 	if (!is_fru_eeprom_supported(adev))
 		return 0;
@@ -139,7 +145,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 		len = sizeof(adev->product_name) - 1;
 	}
 	/* Start at 2 due to buff using fields 0 and 1 for the address */
-	memcpy(adev->product_name, &buff[2], len);
+	memcpy(adev->product_name, &buff[offset], len);
 	adev->product_name[len] = '\0';
 
 	addrptr += size + 1;
@@ -157,7 +163,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 		DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
 		len = sizeof(adev->product_number) - 1;
 	}
-	memcpy(adev->product_number, &buff[2], len);
+	memcpy(adev->product_number, &buff[offset], len);
 	adev->product_number[len] = '\0';
 
 	addrptr += size + 1;
@@ -184,7 +190,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 		DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
 		len = sizeof(adev->serial) - 1;
 	}
-	memcpy(adev->serial, &buff[2], len);
+	memcpy(adev->serial, &buff[offset], len);
 	adev->serial[len] = '\0';
 
 	return 0;
--
2.25.1