drm/radeon: don't reset dma on NI/SI init

commit 31a25e2caf9367365fcb0e57fd8fa5a42e9b73e4 upstream.

Otherwise we may lose the DMA golden settings which can
lead to hangs, etc.

bug:
https://www.libreoffice.org/bugzilla/show_bug.cgi?id=83500

Reviewed-by: Christian König <christian.koenig@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/radeon/ni_dma.c b/drivers/gpu/drm/radeon/ni_dma.c
index 7cf96b1..94fa49e 100644 (file)
--- a/drivers/gpu/drm/radeon/ni_dma.c
+++ b/drivers/gpu/drm/radeon/ni_dma.c
@@ -191,12 +191,6 @@ int cayman_dma_resume(struct radeon_device *rdev)
        u32 reg_offset, wb_offset;
        int i, r;
 
-       /* Reset dma */
-       WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA | SOFT_RESET_DMA1);
-       RREG32(SRBM_SOFT_RESET);
-       udelay(50);
-       WREG32(SRBM_SOFT_RESET, 0);
-
        for (i = 0; i < 2; i++) {
                if (i == 0) {
                        ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];