viafb: improve lcd code readability

viafb: improve lcd code readability

This changes the code to better reflect that we can (currently) only
perform upscaling.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>

diff --git a/drivers/video/via/lcd.c b/drivers/video/via/lcd.c
index 438a106..55cb4ec 100644 (file)
--- a/drivers/video/via/lcd.c
+++ b/drivers/video/via/lcd.c
@@ -437,7 +437,7 @@ static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
        viafb_write_reg_mask(CR79, VIACR, 0x07, BIT0 + BIT1 + BIT2);
 
        /* Check if expansion for horizontal */
-       if (set_hres != panel_hres) {
+       if (set_hres < panel_hres) {
                /* Load Horizontal Scaling Factor */
                switch (viaparinfo->chip_info->gfx_chip_name) {
                case UNICHROME_CLE266:
@@ -477,7 +477,7 @@ static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
        }
 
        /* Check if expansion for vertical */
-       if (set_vres != panel_vres) {
+       if (set_vres < panel_vres) {
                /* Load Vertical Scaling Factor */
                switch (viaparinfo->chip_info->gfx_chip_name) {
                case UNICHROME_CLE266:
@@ -643,9 +643,8 @@ void viafb_lcd_set_mode(struct crt_mode_table *mode_crt_table,
                                 (mode_crt_reg, panel_crt_reg), IGA1);
        } else {
                /* Expansion */
-               if ((plvds_setting_info->display_method ==
-                    LCD_EXPANDSION) & ((set_hres != panel_hres)
-                                       || (set_vres != panel_vres))) {
+               if (plvds_setting_info->display_method == LCD_EXPANDSION
+                       && (set_hres < panel_hres || set_vres < panel_vres)) {
                        /* expansion timing IGA2 loaded panel set timing*/
                        viafb_load_crtc_timing(panel_crt_reg, IGA2);
                        DEBUG_MSG(KERN_INFO "viafb_load_crtc_timing!!\n");