[PATCH video-mga] xf86-video-mga: Fix-to-always-set-HiPri-for-G200e4

[Samer El Haj Mahmoud]

Reviewed-by: Samer El-Haj-Mahmoud <smahmoud at lenovo.com>
________________________________
From: xorg-devel <xorg-devel-bounces at lists.x.org> on behalf of mathieu.larouche at matrox.com <mathieu.larouche at matrox.com>
Sent: Monday, June 12, 2017 4:08:42 PM
To: xorg-devel at lists.x.org
Cc: Mathieu Larouche
Subject: [PATCH video-mga] xf86-video-mga: Fix-to-always-set-HiPri-for-G200e4

From: Mathieu Larouche <mathieu.larouche at matrox.com>

  - Changed the HiPri value for G200e4 to always be 0.
  - Added Bandwith limitation to block resolution above 1920x1200x60Hz
---
 src/mga_driver.c | 43 ++++++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/src/mga_driver.c b/src/mga_driver.c
index 79c6da7..615518a 100644
--- a/src/mga_driver.c
+++ b/src/mga_driver.c
@@ -2969,14 +2969,21 @@ MGAModeInit(ScrnInfoPtr pScrn, DisplayModePtr mode)
             }


-            ulMemoryBandwidth = (mode->Clock * ulBitsPerPixel) / 1000;
-
-            if      (ulMemoryBandwidth    > 3100)  ucHiPriLvl = 0;
-            else if (ulMemoryBandwidth    > 2600)  ucHiPriLvl = 1;
-            else if (ulMemoryBandwidth    > 1900)  ucHiPriLvl = 2;
-            else if (ulMemoryBandwidth    > 1160)  ucHiPriLvl = 3;
-            else if (ulMemoryBandwidth    > 440)   ucHiPriLvl = 4;
-            else ucHiPriLvl = 5;
+            if (pMga->reg_1e24 >= 0x04)
+            {
+                ucHiPriLvl = 0;
+            }
+            else
+            {
+                 ulMemoryBandwidth = (mode->Clock * ulBitsPerPixel) / 1000;
+
+                if      (ulMemoryBandwidth    > 3100)  ucHiPriLvl = 0;
+                else if (ulMemoryBandwidth    > 2600)  ucHiPriLvl = 1;
+                else if (ulMemoryBandwidth    > 1900)  ucHiPriLvl = 2;
+                else if (ulMemoryBandwidth    > 1160)  ucHiPriLvl = 3;
+                else if (ulMemoryBandwidth    > 440)   ucHiPriLvl = 4;
+                else ucHiPriLvl = 5;
+            }

             OUTREG8(0x1FDE, 0x06);
                     OUTREG8(0x1FDF, ucHiPriLvl);
@@ -3883,15 +3890,17 @@ MGAValidMode(SCRN_ARG_TYPE arg, DisplayModePtr mode, Bool verbose, int flags)
                     return MODE_VIRTUAL_Y;
                 if (xf86ModeBandwidth(mode, pScrn->bitsPerPixel) > 244)
                     return MODE_BANDWIDTH;
-        } else {
-            if (pMga->reg_1e24 == 0x02) {
-                   if (mode->HDisplay > 1920)
-                       return MODE_VIRTUAL_X;
-                   if (mode->VDisplay > 1200)
-                       return MODE_VIRTUAL_Y;
-                   if (xf86ModeBandwidth(mode, pScrn->bitsPerPixel) > 301)
-                       return MODE_BANDWIDTH;
-            }
+        } else if (pMga->reg_1e24 == 0x02) {
+            if (mode->HDisplay > 1920)
+                return MODE_VIRTUAL_X;
+            if (mode->VDisplay > 1200)
+                return MODE_VIRTUAL_Y;
+            if (xf86ModeBandwidth(mode, pScrn->bitsPerPixel) > 301)
+                return MODE_BANDWIDTH;
+        }
+        else {
+            if (xf86ModeBandwidth(mode, pScrn->bitsPerPixel) > 550)
+                return MODE_BANDWIDTH;
         }
     } else if (pMga->is_G200WB){
         if (mode->Flags & V_DBLSCAN)
--
1.8.3.1

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