atyfb: fix alignment for block writes

[karo-tx-linux.git] / drivers / video / aty / mach64_accel.c

diff --git a/drivers/video/aty/mach64_accel.c b/drivers/video/aty/mach64_accel.c
index 0cc9724e61a268cc8e21acfbd5cd4ff05100a6f6..51fcc0a2c94a9097aea33eff174b1b38969b263d 100644 (file)
--- a/drivers/video/aty/mach64_accel.c
+++ b/drivers/video/aty/mach64_accel.c
@@ -63,14 +63,17 @@ static void reset_GTC_3D_engine(const struct atyfb_par *par)
 void aty_init_engine(struct atyfb_par *par, struct fb_info *info)
 {
        u32 pitch_value;
+       u32 vxres;
 
        /* determine modal information from global mode structure */
-       pitch_value = info->var.xres_virtual;
+       pitch_value = info->fix.line_length / (info->var.bits_per_pixel / 8);
+       vxres = info->var.xres_virtual;
 
        if (info->var.bits_per_pixel == 24) {
                /* In 24 bpp, the engine is in 8 bpp - this requires that all */
                /* horizontal coordinates and widths must be adjusted */
                pitch_value *= 3;
+               vxres *= 3;
        }
 
        /* On GTC (RagePro), we need to reset the 3D engine before */
@@ -133,7 +136,7 @@ void aty_init_engine(struct atyfb_par *par, struct fb_info *info)
        aty_st_le32(SC_LEFT, 0, par);
        aty_st_le32(SC_TOP, 0, par);
        aty_st_le32(SC_BOTTOM, par->crtc.vyres - 1, par);
-       aty_st_le32(SC_RIGHT, pitch_value - 1, par);
+       aty_st_le32(SC_RIGHT, vxres - 1, par);
 
        /* set background color to minimum value (usually BLACK) */
        aty_st_le32(DP_BKGD_CLR, 0, par);