linux-kernel - [ 50/82] drm/radeon: fix HD6790, HD6570 backend programming

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Message-Id: <20120607040343.569784344@linuxfoundation.org>
Date:	Thu, 07 Jun 2012 13:04:26 +0900
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Jerome Glisse <jglisse@...hat.com>,
	Alex Deucher <alexander.deucher@....com>,
	Dave Airlie <airlied@...hat.com>
Subject: [ 50/82] drm/radeon: fix HD6790, HD6570 backend programming

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jerome Glisse <jglisse@...hat.com>

commit 95c4b23ec4e2fa5604df229ddf134e31d7b3b378 upstream.

Without this bit sets we get broken rendering and
lockups.

fglrx sets this bit.

Bugs that should be fixed by this patch :
https://bugs.freedesktop.org/show_bug.cgi?id=49792
https://bugzilla.kernel.org/show_bug.cgi?id=43207
https://bugs.freedesktop.org/show_bug.cgi?id=39282

Signed-off-by: Jerome Glisse <jglisse@...hat.com>
Acked-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/evergreen.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2178,9 +2178,9 @@ static void evergreen_gpu_init(struct ra
 		WREG32(CC_SYS_RB_BACKEND_DISABLE, rb);
 		WREG32(GC_USER_RB_BACKEND_DISABLE, rb);
 		WREG32(CC_GC_SHADER_PIPE_CONFIG, sp);
-        }
+	}
 
-	grbm_gfx_index |= SE_BROADCAST_WRITES;
+	grbm_gfx_index = INSTANCE_BROADCAST_WRITES | SE_BROADCAST_WRITES;
 	WREG32(GRBM_GFX_INDEX, grbm_gfx_index);
 	WREG32(RLC_GFX_INDEX, grbm_gfx_index);
 


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