[PATCH 4.4 070/113] drm/amd/amdgpu: sdma resume fail during S4 on CI

Greg Kroah-Hartman
2016-09-05T16:53:54Z

From: jimqu <Jim.Qu@amd.com>

commit 10ea9434065e56fe14287f89258ecf2fb684ed1a upstream.

SDMA could be fail in the thaw() and restore() processes, do software reset
if each SDMA engine is busy.

Signed-off-by: JimQu <Jim.Qu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/amd/amdgpu/cik_sdma.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
@@ -52,6 +52,7 @@ static void cik_sdma_set_ring_funcs(stru
static void cik_sdma_set_irq_funcs(struct amdgpu_device *adev);
static void cik_sdma_set_buffer_funcs(struct amdgpu_device *adev);
static void cik_sdma_set_vm_pte_funcs(struct amdgpu_device *adev);
+static int cik_sdma_soft_reset(void *handle);

MODULE_FIRMWARE("radeon/bonaire_sdma.bin");
MODULE_FIRMWARE("radeon/bonaire_sdma1.bin");
@@ -1030,6 +1031,8 @@ static int cik_sdma_resume(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;

+ cik_sdma_soft_reset(handle);
+
return cik_sdma_hw_init(adev);
}