[PATCH] drm/amd: fix gfx hang on renoir in IGT reload test

[Tianci Yin]

From: "Tianci.Yin" <tianci.yin at amd.com>

[why]
CP hangs in igt reloading test on renoir, more precisely, hangs on the
second time insmod.

[how]
mode2 reset can make it recover, and mode2 reset only effects gfx core,
dcn and the screen will not be impacted.

Signed-off-by: Tianci.Yin <tianci.yin at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc15.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 496c4a6e23ac..f0713c027ed5 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -853,6 +853,11 @@ static bool soc15_need_reset_on_init(struct amdgpu_device *adev)
 {
 	u32 sol_reg;
 
+	/* CP hangs in IGT reloading test on RN, reset to WA */
+	if(adev->asic_type == CHIP_RENOIR) {
+		return true;
+	}
+
 	/* Just return false for soc15 GPUs.  Reset does not seem to
 	 * be necessary.
 	 */
-- 
2.25.1