Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / drivers / video / aty / mach64_ct.c

diff --git a/drivers/video/aty/mach64_ct.c b/drivers/video/aty/mach64_ct.c
index 9bdb2aa..e705693 100644 (file)
--- a/drivers/video/aty/mach64_ct.c
+++ b/drivers/video/aty/mach64_ct.c
@@ -206,9 +206,7 @@ static int aty_valid_pll_ct(const struct fb_info *info, u32 vclk_per, struct pll
 {
        u32 q;
        struct atyfb_par *par = (struct atyfb_par *) info->par;
-#ifdef DEBUG
        int pllvclk;
-#endif
 
        /* FIXME: use the VTB/GTB /{3,6,12} post dividers if they're better suited */
        q = par->ref_clk_per * pll->pll_ref_div * 4 / vclk_per;
@@ -223,13 +221,26 @@ static int aty_valid_pll_ct(const struct fb_info *info, u32 vclk_per, struct pll
        pll->vclk_post_div_real = postdividers[pll->vclk_post_div];
        //    pll->vclk_post_div <<= 6;
        pll->vclk_fb_div = q * pll->vclk_post_div_real / 8;
-#ifdef DEBUG
        pllvclk = (1000000 * 2 * pll->vclk_fb_div) /
                (par->ref_clk_per * pll->pll_ref_div);
+#ifdef DEBUG
        printk("atyfb(%s): pllvclk=%d MHz, vclk=%d MHz\n",
                __FUNCTION__, pllvclk, pllvclk / pll->vclk_post_div_real);
 #endif
        pll->pll_vclk_cntl = 0x03; /* VCLK = PLL_VCLK/VCLKx_POST */
+
+       /* Set ECP (scaler/overlay clock) divider */
+       if (par->pll_limits.ecp_max) {
+               int ecp = pllvclk / pll->vclk_post_div_real;
+               int ecp_div = 0;
+
+               while (ecp > par->pll_limits.ecp_max && ecp_div < 2) {
+                       ecp >>= 1;
+                       ecp_div++;
+               }
+               pll->pll_vclk_cntl |= ecp_div << 4;
+       }
+
        return 0;
 }