viafb: split color mode setting up

This patch splits color mode setting up in seperate functions.  Some
hardware initialization that was previously mixed with it is moved to
viafb_setmode.  As are the calls to the newly created function.  This is
yet another little step towards controlling each IGA on its own.

As this patch really aims too mimic the old behaviour no regressions are
expected.  However I noticed that 8bpp (or 6bpp?) seems actually a bit
broken before and after the patch.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Joseph Chan <JosephChan@via.com.tw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/via/hw.c

@@ -685,6 +685,54 @@ void viafb_set_secondary_pitch(u32 pitch)
 	viafb_write_reg_mask(0x71, VIACR, (pitch >> (10 - 7)) & 0x80, 0x80);
 }
 
+void viafb_set_primary_color_depth(u8 depth)
+{
+	u8 value;
+
+	DEBUG_MSG(KERN_DEBUG "viafb_set_primary_color_depth(%d)\n", depth);
+	switch (depth) {
+	case 6:
+		value = 0x00;
+		break;
+	case 16:
+		value = 0x14;
+		break;
+	case 24:
+		value = 0x0C;
+		break;
+	default:
+		printk(KERN_WARNING "viafb_set_primary_color_depth: "
+			"Unsupported depth: %d\n", depth);
+		return;
+	}
+
+	viafb_write_reg_mask(0x15, VIASR, value, 0x1C);
+}
+
+void viafb_set_secondary_color_depth(u8 depth)
+{
+	u8 value;
+
+	DEBUG_MSG(KERN_DEBUG "viafb_set_secondary_color_depth(%d)\n", depth);
+	switch (depth) {
+	case 6:
+		value = 0x00;
+		break;
+	case 16:
+		value = 0x40;
+		break;
+	case 24:
+		value = 0xC0;
+		break;
+	default:
+		printk(KERN_WARNING "viafb_set_secondary_color_depth: "
+			"Unsupported depth: %d\n", depth);
+		return;
+	}
+
+	viafb_write_reg_mask(0x67, VIACR, value, 0xC0);
+}
+
 void viafb_set_output_path(int device, int set_iga, int output_interface)
 {
 	switch (device) {
@@ -1761,35 +1809,6 @@ void viafb_load_crtc_timing(struct display_timing device_timing,
 	viafb_lock_crt();
 }
 
-void viafb_set_color_depth(int bpp_byte, int set_iga)
-{
-	if (set_iga == IGA1) {
-		switch (bpp_byte) {
-		case MODE_8BPP:
-			viafb_write_reg_mask(SR15, VIASR, 0x22, 0x7E);
-			break;
-		case MODE_16BPP:
-			viafb_write_reg_mask(SR15, VIASR, 0xB6, 0xFE);
-			break;
-		case MODE_32BPP:
-			viafb_write_reg_mask(SR15, VIASR, 0xAE, 0xFE);
-			break;
-		}
-	} else {
-		switch (bpp_byte) {
-		case MODE_8BPP:
-			viafb_write_reg_mask(CR67, VIACR, 0x00, BIT6 + BIT7);
-			break;
-		case MODE_16BPP:
-			viafb_write_reg_mask(CR67, VIACR, 0x40, BIT6 + BIT7);
-			break;
-		case MODE_32BPP:
-			viafb_write_reg_mask(CR67, VIACR, 0xC0, BIT6 + BIT7);
-			break;
-		}
-	}
-}
-
 void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
 	struct VideoModeTable *video_mode, int bpp_byte, int set_iga)
 {
@@ -1867,9 +1886,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
 	    && (viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400))
 		viafb_load_FIFO_reg(set_iga, h_addr, v_addr);
 
-	/* load SR Register About Memory and Color part */
-	viafb_set_color_depth(bpp_byte, set_iga);
-
 	pll_D_N = viafb_get_clk_value(crt_table[index].clk);
 	DEBUG_MSG(KERN_INFO "PLL=%x", pll_D_N);
 	viafb_set_vclock(pll_D_N, set_iga);
@@ -2206,6 +2222,8 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 		outb(VPIT.SR[i - 1], VIASR + 1);
 	}
 
+	viafb_write_reg_mask(0x15, VIASR, viafbinfo->fix.visual
+		== FB_VISUAL_PSEUDOCOLOR ? 0x22 : 0xA2, 0xA2);
 	viafb_set_iga_path();
 
 	/* Write CRTC */
@@ -2245,6 +2263,9 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 	viafb_set_primary_pitch(viafbinfo->fix.line_length);
 	viafb_set_secondary_pitch(viafb_dual_fb ? viafbinfo1->fix.line_length
 		: viafbinfo->fix.line_length);
+	viafb_set_primary_color_depth(viaparinfo->depth);
+	viafb_set_secondary_color_depth(viafb_dual_fb ? viaparinfo1->depth
+		: viaparinfo->depth);
 	/* Update Refresh Rate Setting */
 
 	/* Clear On Screen */

drivers/video/via/hw.h

@@ -895,7 +895,6 @@ void viafb_load_fetch_count_reg(int h_addr, int bpp_byte, int set_iga);
 void viafb_write_regx(struct io_reg RegTable[], int ItemNum);
 u32 viafb_get_clk_value(int clk);
 void viafb_load_FIFO_reg(int set_iga, int hor_active, int ver_active);
-void viafb_set_color_depth(int bpp_byte, int set_iga);
 void viafb_set_dpa_gfx(int output_interface, struct GFX_DPA_SETTING\
 					*p_gfx_dpa_setting);
 

drivers/video/via/lcd.c

@@ -1006,8 +1006,6 @@ void viafb_lcd_set_mode(struct crt_mode_table *mode_crt_table,
 		if ((viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
 		    && (viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400))
 			viafb_load_FIFO_reg(set_iga, set_hres, set_vres);
-
-		viafb_set_color_depth(mode_bpp / 8, set_iga);
 	}
 
 	fill_lcd_format();