OMAPDSS: HDMI: Disable DDC internal pull up

Disables the internal pull resistor for SDA and SCL which are enabled by
default, as there are external pull up's in 4460 and 4430 ES2.3
SDP, Blaze and Panda Boards, It is done to avoid the EDID read failure.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@linaro.org>
Signed-off-by: Mythri P K <mythripk@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
index 9cc41ce29dab..3e1c507fb01f 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/arch/arm/mach-omap2/board-omap4panda.c
@@ -530,7 +530,15 @@ void omap4_panda_display_init(void)
                 pr_err("error initializing panda DVI\n");
 
         omap_display_init(&omap4_panda_dss_data);
-        omap_hdmi_init();
+
+        /*
+         * OMAP4460SDP/Blaze and OMAP4430 ES2.3 SDP/Blaze boards and
+         * later have external pull up on the HDMI I2C lines
+         */
+        if (cpu_is_omap446x() || omap_rev() > OMAP4430_REV_ES2_2)
+                omap_hdmi_init(OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP);
+        else
+                omap_hdmi_init(0);
 }
 
 static void __init omap4_panda_init(void)