patches.gma500/0042-drm-gma500-mrst-Replace-WMs-and-chickenbits-with-val.patch

From e2a79affcdc3b27fedd04e7a7c1020e0a2c512ac Mon Sep 17 00:00:00 2001
From: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Date: Thu, 7 Nov 2013 02:34:12 +0100
Subject: drm/gma500/mrst: Replace WMs and chickenbits with values from EMGD

For the minnowboard to work the values found in EMGD are required.
This might break Oaktrail but without hardware to test with I cannot
really tell (and do not really care).

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
(cherry picked from commit 99d754bb46e41cf88f6e5d96dd3c6c3b9c3bddb3)
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
---
 drivers/gpu/drm/gma500/oaktrail_crtc.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

--- a/drivers/gpu/drm/gma500/oaktrail_crtc.c
+++ b/drivers/gpu/drm/gma500/oaktrail_crtc.c
@@ -332,16 +332,15 @@ static void oaktrail_crtc_dpms(struct dr
 		break;
 	}
 
-	/*Set FIFO Watermarks*/
-	REG_WRITE(DSPARB, 0x3FFF);
-	REG_WRITE(DSPFW1, 0x3F88080A);
-	REG_WRITE(DSPFW2, 0x0b060808);
+	/* Set FIFO Watermarks (values taken from EMGD) */
+	REG_WRITE(DSPARB, 0x3f80);
+	REG_WRITE(DSPFW1, 0x3f8f0404);
+	REG_WRITE(DSPFW2, 0x04040f04);
 	REG_WRITE(DSPFW3, 0x0);
-	REG_WRITE(DSPFW4, 0x08030404);
+	REG_WRITE(DSPFW4, 0x04040404);
 	REG_WRITE(DSPFW5, 0x04040404);
 	REG_WRITE(DSPFW6, 0x78);
-	REG_WRITE(0x70400, REG_READ(0x70400) | 0x4000);
-	/* Must write Bit 14 of the Chicken Bit Register */
+	REG_WRITE(DSPCHICKENBIT, REG_READ(DSPCHICKENBIT) | 0xc040);
 
 	gma_power_end(dev);
 }