[PATCH V3 3/4] lcd: calculate line_length after lcd_ctrl_init()
swarren at wwwdotorg.org
Thu Nov 8 01:38:32 EST 2012
When an LCD driver is actually driving a regular external display, e.g.
an HDMI monitor, the display resolution might not be known until the
display controller has initialized, i.e. during lcd_ctrl_init(). However,
lcd.c calculates lcd_line_length before calling this function, thus
relying on a hard-coded resolution in struct panel_info.
Instead, defer this calculation until after lcd_ctrl_init() has had the
chance to dynamically determine the resolution. This needs to happen
before lcd_clear(), since the value is used there.
grep indicates that no code outside lcd.c uses this lcd_line_length; in
particular, no lcd_ctrl_init() implementations read it.
Signed-off-by: Stephen Warren <swarren at wwwdotorg.org>
v3: No change.
common/lcd.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/common/lcd.c b/common/lcd.c
index b6be800..1a20f85 100644
@@ -333,8 +333,6 @@ int drv_lcd_init (void)
lcd_base = (void *)(gd->fb_base);
- lcd_line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;
lcd_init(lcd_base); /* LCD initialization */
/* Device initialization */
@@ -416,6 +414,7 @@ static int lcd_init(void *lcdbase)
debug("[LCD] Initializing LCD frambuffer at %p\n", lcdbase);
+ lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
lcd_is_enabled = 1;
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