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[2/4] viafb: always return the best possible clock

Message ID 1299966386-3439-3-git-send-email-FlorianSchandinat@gmx.de (mailing list archive)
State Not Applicable
Headers show

Commit Message

Florian Tobias Schandinat March 12, 2011, 9:46 p.m. UTC 
None
diff mbox

Patch

diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index 8c1393e..a7a5614 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -1677,40 +1677,36 @@  static u32 vx855_encode_pll(struct pll_config pll)
 u32 viafb_get_clk_value(int clk)
 {
 	u32 value = 0;
-	int i = 0;
+	int i, best = 0;
 
-	while (i < NUM_TOTAL_PLL_TABLE && clk != pll_value[i].clk)
-		i++;
-
-	if (i == NUM_TOTAL_PLL_TABLE) {
-		printk(KERN_WARNING "viafb_get_clk_value: PLL lookup failed!");
-	} else {
-		switch (viaparinfo->chip_info->gfx_chip_name) {
-		case UNICHROME_CLE266:
-		case UNICHROME_K400:
-			value = cle266_encode_pll(pll_value[i].cle266_pll);
-			break;
-
-		case UNICHROME_K800:
-		case UNICHROME_PM800:
-		case UNICHROME_CN700:
-			value = k800_encode_pll(pll_value[i].k800_pll);
-			break;
-
-		case UNICHROME_CX700:
-		case UNICHROME_CN750:
-		case UNICHROME_K8M890:
-		case UNICHROME_P4M890:
-		case UNICHROME_P4M900:
-		case UNICHROME_VX800:
-			value = k800_encode_pll(pll_value[i].cx700_pll);
-			break;
+	for (i = 1; i < ARRAY_SIZE(pll_value); i++) {
+		if (abs(pll_value[i].clk - clk)
+			< abs(pll_value[best].clk - clk))
+			best = i;
+	}
 
-		case UNICHROME_VX855:
-		case UNICHROME_VX900:
-			value = vx855_encode_pll(pll_value[i].vx855_pll);
-			break;
-		}
+	switch (viaparinfo->chip_info->gfx_chip_name) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+		value = cle266_encode_pll(pll_value[best].cle266_pll);
+		break;
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+		value = k800_encode_pll(pll_value[best].k800_pll);
+		break;
+	case UNICHROME_CX700:
+	case UNICHROME_CN750:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+	case UNICHROME_VX800:
+		value = k800_encode_pll(pll_value[best].cx700_pll);
+		break;
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		value = vx855_encode_pll(pll_value[best].vx855_pll);
+		break;
 	}
 
 	return value;
diff --git a/drivers/video/via/hw.h b/drivers/video/via/hw.h
index 668d534..7295263 100644
--- a/drivers/video/via/hw.h
+++ b/drivers/video/via/hw.h
@@ -893,8 +893,6 @@  struct iga2_crtc_timing {
 /* VT3410 chipset*/
 #define VX900_FUNCTION3     0x3410
 
-#define NUM_TOTAL_PLL_TABLE ARRAY_SIZE(pll_value)
-
 struct IODATA {
 	u8 Index;
 	u8 Mask;