[PATCH] drm/amdgpu: fix sdma doorbell range setting

[Deucher, Alexander]

Alternatively, we could cherry-pick the change to the doorbell ranges from Shaoyun.  Might also be useful to leave a comment here about the doorbell range for vega20 sdma.


Alex

________________________________
From: Zhang, Hawking
Sent: Tuesday, August 21, 2018 5:02:24 AM
To: Quan, Evan; amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander; Quan, Evan
Subject: RE: [PATCH] drm/amdgpu: fix sdma doorbell range setting

Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>

Regards,
Hawking
-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Evan Quan
Sent: 2018年8月21日 16:21
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Quan, Evan <Evan.Quan at amd.com>; Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: [PATCH] drm/amdgpu: fix sdma doorbell range setting

Use the old doorbell range setting until the driver is able to support more sdma queues.

Change-Id: I80fc067fc64878d3c7dc3d38bbe1c6c94bec397f
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
index 89ea92075b6b..2e65447637c6 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
@@ -76,7 +76,7 @@ static void nbio_v7_4_sdma_doorbell_range(struct amdgpu_device *adev, int instan

         if (use_doorbell) {
                 doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, OFFSET, doorbell_index);
-               doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 8);
+               doorbell_range = REG_SET_FIELD(doorbell_range,
+BIF_SDMA0_DOORBELL_RANGE, SIZE, 2);
         } else
                 doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 0);

--
2.18.0

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