intelfb: fixup pitch calculation like X does

[linux-2.6] / drivers / video / intelfb / intelfbdrv.c

diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c
index 9e83664e345cf11e05abe86705719999028bc230..2aba6a4a9eae9dc2a30cc572645900fe3d80c2d9 100644 (file)
--- a/drivers/video/intelfb/intelfbdrv.c
+++ b/drivers/video/intelfb/intelfbdrv.c
@@ -1164,16 +1164,33 @@ intelfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
        struct fb_var_screeninfo v;
        struct intelfb_info *dinfo;
        static int first = 1;
+       int i;
+       /* Good pitches to allow tiling.  Don't care about pitches < 1024. */
+       static const int pitches[] = {
+               128 * 8,
+               128 * 16,
+               128 * 32,
+               128 * 64,
+               0
+       };
 
        DBG_MSG("intelfb_check_var: accel_flags is %d\n", var->accel_flags);
 
        dinfo = GET_DINFO(info);
 
+       /* update the pitch */
        if (intelfbhw_validate_mode(dinfo, var) != 0)
                return -EINVAL;
 
        v = *var;
 
+       for (i = 0; pitches[i] != 0; i++) {
+               if (pitches[i] >= v.xres_virtual) {
+                       v.xres_virtual = pitches[i];
+                       break;
+               }
+       }
+
        /* Check for a supported bpp. */
        if (v.bits_per_pixel <= 8) {
                v.bits_per_pixel = 8;