[3.13.y.z extended stable] Patch "drm/radeon: don't reset dma on r6xx-evergreen init" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Thu Oct 9 20:51:37 UTC 2014


This is a note to let you know that I have just added a patch titled

    drm/radeon: don't reset dma on r6xx-evergreen init

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11.9.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 049755ccabdcf3fa601d01c07f7599b589dc9500 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Thu, 18 Sep 2014 10:23:04 -0400
Subject: drm/radeon: don't reset dma on r6xx-evergreen init
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit c1789a2e66a4209fe5035eca11fdd729b2ffdd82 upstream.

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

Reviewed-by: Christian K├Ânig <christian.koenig at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/radeon/r600_dma.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/gpu/drm/radeon/r600_dma.c b/drivers/gpu/drm/radeon/r600_dma.c
index 7844d15..616d37a 100644
--- a/drivers/gpu/drm/radeon/r600_dma.c
+++ b/drivers/gpu/drm/radeon/r600_dma.c
@@ -116,15 +116,6 @@ int r600_dma_resume(struct radeon_device *rdev)
 	u32 rb_bufsz;
 	int r;

-	/* Reset dma */
-	if (rdev->family >= CHIP_RV770)
-		WREG32(SRBM_SOFT_RESET, RV770_SOFT_RESET_DMA);
-	else
-		WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA);
-	RREG32(SRBM_SOFT_RESET);
-	udelay(50);
-	WREG32(SRBM_SOFT_RESET, 0);
-
 	WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL, 0);
 	WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL, 0);

--
1.9.1





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