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 <swar...@wwwdotorg.org>
Acked-by: Anatolij Gustschin <ag...@denx.de>
--
v5: No change; merged patch series.
v4: Adjusted to addition of lcd_get_size() function. Rebased.
v3: No change.
---
 common/lcd.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/lcd.c b/common/lcd.c
index 66d4f94..9fa4e5c 100644
--- a/common/lcd.c
+++ b/common/lcd.c
@@ -384,8 +384,6 @@ int drv_lcd_init (void)
 
        lcd_base = (void *)(gd->fb_base);
 
-       lcd_get_size(&lcd_line_length);
-
        lcd_init(lcd_base);             /* LCD initialization */
 
        /* Device initialization */
@@ -468,6 +466,8 @@ static int lcd_init(void *lcdbase)
        debug("[LCD] Initializing LCD frambuffer at %p\n", lcdbase);
 
        lcd_ctrl_init(lcdbase);
+       lcd_get_size(&lcd_line_length);
+       lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
        lcd_is_enabled = 1;
        lcd_clear();
        lcd_enable ();
-- 
1.7.10.4

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