zen/zenxfi: correctly implement lcdif errata

Change-Id: Ib2a6000035d70d687025a78bbea416d77af562fe

1 files changed, 3 insertions, 1 deletions

diff --git a/firmware/target/arm/imx233/creative-zen/lcd-zen.c b/firmware/target/arm/imx233/creative-zen/lcd-zen.c
index 4f459937f0..e9644278f1 100644
--- a/firmware/target/arm/imx233/creative-zen/lcd-zen.c
+++ b/firmware/target/arm/imx233/creative-zen/lcd-zen.c
@@ -266,7 +266,9 @@ void lcd_enable(bool enable)
         lcd_power(false);
         // stop lcdif
         BF_CLR(LCDIF_CTRL, DOTCLK_MODE);
-        // stmp37xx errata: clearing DOTCLK_MODE won't clear RUN
+        /* stmp37xx errata: clearing DOTCLK_MODE won't clear RUN: wait until
+         * fifo is empty and then clear manually */
+        while(!BF_RD(LCDIF_STAT, TXFIFO_EMPTY));
         BF_CLR(LCDIF_CTRL, RUN);
         // disable spi
         spi_enable(false);