[PATCH] drm/amdgpu: skip fb size query for navi10 previous asic

[Zhang, Hawking]

[AMD Public Use]

It looks more reasonable to me to move the AISC type check to the following. We usually don't add any ASIC type check in atomfirmware interfaces.

	adev->discovery_tmr_size =
		amdgpu_atomfirmware_get_fw_reserved_fb_size(adev);

Regards,
Hawking

-----Original Message-----
From: Zhang, Hawking <Hawking.Zhang at amd.com> 
Sent: Friday, June 5, 2020 22:10
To: Zhang, Hawking <Hawking.Zhang at amd.com>; Gao, Likun <Likun.Gao at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Xu, Feifei <Feifei.Xu at amd.com>
Subject: RE: [PATCH] drm/amdgpu: skip fb size query for navi10 previous asic

[AMD Public Use]

Wait, I see the risk. the amdgpu_ttm_init is general one even the prior Vega10 ASIC will invoke it, and they don't have atomfirmware support.

Regards,
Hawking

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Zhang, Hawking
Sent: Friday, June 5, 2020 22:05
To: Gao, Likun <Likun.Gao at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Xu, Feifei <Feifei.Xu at amd.com>
Subject: RE: [PATCH] drm/amdgpu: skip fb size query for navi10 previous asic

[AMD Public Use]

Does it mean there is legacy VBIOS that even doesn't have firmwareinfo table and introduce crash?

I think we expect the atomfirmware interface return 0 for ASICs prior to Sienna Cichlid

Regards,
Hawking

-----Original Message-----
From: Gao, Likun <Likun.Gao at amd.com> 
Sent: Friday, June 5, 2020 21:04
To: amd-gfx at lists.freedesktop.org
Cc: Zhang, Hawking <Hawking.Zhang at amd.com>; Xu, Feifei <Feifei.Xu at amd.com>; Gao, Likun <Likun.Gao at amd.com>
Subject: [PATCH] drm/amdgpu: skip fb size query for navi10 previous asic

From: Likun Gao <Likun.Gao at amd.com>

Skip for reserved fb size query for the ASIC older than navi10, as those asic do not need for TMR region reserve and may get an invalid value.

Signed-off-by: Likun Gao <Likun.Gao at amd.com>
Change-Id: Idbc57805b8070f27ba6c3cf22f1892d6dab92f06
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index a9adccfda4c0..e2a64ae7bcaf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -603,6 +603,9 @@ int amdgpu_atomfirmware_get_fw_reserved_fb_size(struct amdgpu_device *adev)
 	u8 frev, crev;
 	int fw_reserved_fb_size;
 
+	if (adev->asic_type < CHIP_NAVI10)
+		return 0;
+
 	index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
 			firmwareinfo);
 
--
2.25.1
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