[PATCH] drm/amdgpu: reduce the full access time by about 50ms

[Deng, Emily]

[AMD Official Use Only - Internal Distribution Only]

Reviewed-by: Emily.Deng <Emily.Deng at amd.com>

>-----Original Message-----
>From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of
>pengzhou
>Sent: Thursday, December 24, 2020 2:05 PM
>To: amd-gfx at lists.freedesktop.org
>Subject: [PATCH] drm/amdgpu: reduce the full access time by about 50ms
>
>The function msleep(1) can be delay to 10+ ms sometimes, which contributes
>a big delay during the full access time.
>
>Changing msleep(1) to usleep_range(10, 100) and it can reduce about 50ms
>delay during full access time.
>
>Signed-off-by: pengzhou <PengJu.Zhou at amd.com>
>Change-Id: I151a07c55068d5c429553ef0e6668f024c0c0f3d
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>index 523d22db094b..ef69051681cf 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>@@ -282,7 +282,7 @@ psp_cmd_submit_buf(struct psp_context *psp,
> ras_intr = amdgpu_ras_intr_triggered();
> if (ras_intr)
> break;
>-msleep(1);
>+usleep_range(10, 100);
> amdgpu_asic_invalidate_hdp(psp->adev, NULL);
> }
>
>--
>2.17.1
>
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