linux-kernel - [025/107] drm/radeon/kms: Fix chremap setup on RV770 CE

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Date:	Thu, 07 Jul 2011 17:15:57 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Alex Deucher <alexdeucher@...il.com>,
	Dave Airlie <airlied@...hat.com>
Subject: [025/107] drm/radeon/kms: Fix chremap setup on RV770 CE

2.6.39-stable review patch.  If anyone has any objections, please let us know.

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

From: Alex Deucher <alexdeucher@...il.com>

commit daf54f1f363a61c618662ef66d4bf09d2b090941 upstream.

CE variant requires a different chremap setup.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=35472

Signed-off-by: Alex Deucher <alexdeucher@...il.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/radeon/rv770.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -572,6 +572,12 @@ static void rv770_program_channel_remap(
 	else
 		tcp_chan_steer = 0x00fac688;
 
+	/* RV770 CE has special chremap setup */
+	if (rdev->pdev->device == 0x944e) {
+		tcp_chan_steer = 0x00b08b08;
+		mc_shared_chremap = 0x00b08b08;
+	}
+
 	WREG32(TCP_CHAN_STEER, tcp_chan_steer);
 	WREG32(MC_SHARED_CHREMAP, mc_shared_chremap);
 }


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