drm/amdgpu: Fix RLC safe mode test in gfx_v9_0_enter_rlc_safe_mode

commit 226127a67e31a9518d9516d3e4890759b379d874 upstream.

We were testing the register offset, instead of the value stored in the
register, therefore always timing out the loop.

This reduces suspend time of the system in the bug report below by ~600
ms.

Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/107277
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 1a30c54a0889f20e451389e495ba562d5549a1c0..3981915e2311f72735841088e939ee7898211954 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3113,7 +3113,7 @@ static void gfx_v9_0_enter_rlc_safe_mode(struct amdgpu_device *adev)
 
                /* wait for RLC_SAFE_MODE */
                for (i = 0; i < adev->usec_timeout; i++) {
-                       if (!REG_GET_FIELD(SOC15_REG_OFFSET(GC, 0, mmRLC_SAFE_MODE), RLC_SAFE_MODE, CMD))
+                       if (!REG_GET_FIELD(RREG32_SOC15(GC, 0, mmRLC_SAFE_MODE), RLC_SAFE_MODE, CMD))
                                break;
                        udelay(1);
                }