File 1006-drm-mgag200-Fix-to-always-set-HiPri-for-G200e4.patch of Package drm

From: Mathieu Larouche <mathieu.larouche@matrox.com>
Date: Tue Jun 13 17:50:38 UTC 2017
Subject: drm/mgag200: Fix to always set HiPri for G200e4
Patch-mainline: Submitted, dri-devel ML
References: bsc#1015452, bsc#995542

This patch was tested by Matrox and Lenovo and submitted via
https://lists.freedesktop.org/archives/dri-devel/2017-June/144176.html

  - Changed the HiPri value for G200e4 to always be 0.
  - Added Bandwith limitation to block resolution above 1920x1200x60Hz

Signed-off-by: Mathieu Larouche <mathieu.larouche@matrox.com>
Signed-off-by: Stefan Dirsch <sndirsch@suse.de>
Reviewed-by:   Stefan Dirsch <sndirsch@suse.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/mgag200/mgag200_mode.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1172,7 +1172,10 @@ static int mga_crtc_mode_set(struct drm_
 
 
 	if (IS_G200_SE(mdev)) {
-		if (mdev->unique_rev_id >= 0x02) {
+		if  (mdev->unique_rev_id >= 0x04) {
+			WREG8(MGAREG_CRTCEXT_INDEX, 0x06);
+			WREG8(MGAREG_CRTCEXT_DATA, 0);
+		} else if (mdev->unique_rev_id >= 0x02) {
 			u8 hi_pri_lvl;
 			u32 bpp;
 			u32 mb;
@@ -1637,6 +1640,10 @@ static int mga_vga_mode_valid(struct drm
 			if (mga_vga_calculate_mode_bandwidth(mode, bpp)
 				> (30100 * 1024))
 				return MODE_BANDWIDTH;
+		} else {
+			if (mga_vga_calculate_mode_bandwidth(mode, bpp)
+			    > (55000 * 1024))
+				return MODE_BANDWIDTH;
 		}
 	} else if (mdev->type == G200_WB) {
 		if (mode->hdisplay > 1280)