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[directfb-dev] Success with AGP
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[directfb-dev] Success with AGP



I just added the AGP setup ioctl to my previous attempt and it works!
Here's an incremental patch.

--- DirectFB/src/core/agp.c~	Tue Jun 18 07:05:13 2002
+++ DirectFB/src/core/agp.c	Wed Jun 19 02:19:00 2002
@@ -158,6 +158,21 @@
     return DFB_OK;
 }
 
+static DFBResult dfb_agp_setup(unsigned long mode)
+{
+    agp_setup setup;
+
+    setup.agp_mode = mode;
+
+    if (ioctl(agp->fd, AGPIOC_SETUP, &setup) != 0) {
+        PERRORMSG( "DirectFB/core/agp: "
+                   "AGP setup failed!\n");
+        return errno2dfb(errno);
+    }
+
+    return DFB_OK;
+}
+
 
 DFBResult dfb_agp_initialize()
 {
@@ -194,6 +209,7 @@
 
         return DFB_INIT;
     }
+    dfb_agp_setup(Sagp->info.agp_mode);
 
     /* Map the AGP aperture */
     agp->agp_base = mmap( NULL, Sagp->info.aper_size * 0x100000,


Bencmark results:
Benchmarking with 256x256 in 16bit mode... (16bit)

AGP:
Blit                                   3.02 secs (  189.05 MPixel/sec)
Blit colorkeyed                        3.02 secs (  189.05 MPixel/sec)
Blit with format conversion            3.01 secs (   98.11 MPixel/sec)
Blit from 32bit (alphachannel blend)   3.01 secs (   98.08 MPixel/sec)
Stretch Blit                           3.12 secs (  125.05 MPixel/sec)
Stretch Blit colorkeyed                3.12 secs (  125.05 MPixel/sec)

Card memory:
Blit                                   3.02 secs (  308.15 MPixel/sec)
Blit colorkeyed                        3.01 secs (  308.87 MPixel/sec)
Blit with format conversion            3.02 secs (  141.15 MPixel/sec)
Blit from 32bit (alphachannel blend)   3.04 secs (  129.26 MPixel/sec)
Stretch Blit                           3.06 secs (  147.43 MPixel/sec)
Stretch Blit colorkeyed                3.05 secs (  147.57 MPixel/sec)

"Blit with format conversion" seems to be limited from AGP. I think I'm
running at AGP 2x but I'm not sure. I'll have to make it print some useful
messages on the mode, sba, fw etc.

-- 
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/


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