| Message ID | 1350622294-374-3-git-send-email-swarren@wwwdotorg.org |
|---|---|
| State | Superseded |
| Delegated to: | Anatolij Gustschin |
| Headers | show |
Hi, On Thu, 18 Oct 2012 22:51:33 -0600 Stephen Warren <swarren@wwwdotorg.org> wrote: > 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@wwwdotorg.org> > --- > common/lcd.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) Acked-by: Anatolij Gustschin <agust@denx.de> Thanks, Anatolij
diff --git a/common/lcd.c b/common/lcd.c index b6be800..1a20f85 100644 --- a/common/lcd.c +++ b/common/lcd.c @@ -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_ctrl_init(lcdbase); + lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8; lcd_is_enabled = 1; lcd_clear(); lcd_enable ();
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@wwwdotorg.org> --- common/lcd.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)