From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 18 Sep 2014 14:18:43 +0000 (-0400)
Subject: drm/radeon: don't reset sdma on CIK init
X-Git-Tag: v3.16.4~262
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7d102d16c64a0cd8dd98f9d81502292f04643360;p=thirdparty%2Fkernel%2Fstable.git

drm/radeon: don't reset sdma on CIK init

commit 799028d5d85384cce140323be633c8d5f079193f upstream.

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

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/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c
index 8e9d0f1d858ef..72bff72c036db 100644
--- a/drivers/gpu/drm/radeon/cik_sdma.c
+++ b/drivers/gpu/drm/radeon/cik_sdma.c
@@ -459,13 +459,6 @@ int cik_sdma_resume(struct radeon_device *rdev)
 {
 	int r;
 
-	/* Reset dma */
-	WREG32(SRBM_SOFT_RESET, SOFT_RESET_SDMA | SOFT_RESET_SDMA1);
-	RREG32(SRBM_SOFT_RESET);
-	udelay(50);
-	WREG32(SRBM_SOFT_RESET, 0);
-	RREG32(SRBM_SOFT_RESET);
-
 	r = cik_sdma_load_microcode(rdev);
 	if (r)
 		return r;