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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