4 files changed, 41 insertions, 6 deletions

diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 312b158240ed..e1fe304ce361 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -814,7 +814,14 @@ static void omap_4430sdp_display_init(void)
 	sdp4430_lcd_init();
 	sdp4430_picodlp_init();
 	omap_display_init(&sdp4430_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);
 }
 
 #ifdef CONFIG_OMAP_MUX
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)
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 8436088ffe13..ffd9bd983023 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -97,8 +97,11 @@ static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
 	{ "dss_hdmi", "omapdss_hdmi", -1 },
 };
 
-static void omap4_hdmi_mux_pads()
+static void omap4_hdmi_mux_pads(enum omap_hdmi_flags flags)
 {
+	u32 reg;
+	u16 control_i2c_1;
+
 	/* PAD0_HDMI_HPD_PAD1_HDMI_CEC */
 	omap_mux_init_signal("hdmi_hpd",
 			OMAP_PIN_INPUT_PULLUP);
@@ -109,6 +112,19 @@ static void omap4_hdmi_mux_pads()
 			OMAP_PIN_INPUT_PULLUP);
 	omap_mux_init_signal("hdmi_ddc_sda",
 			OMAP_PIN_INPUT_PULLUP);
+
+	/*
+	 * CONTROL_I2C_1: HDMI_DDC_SDA_PULLUPRESX (bit 28) and
+	 * HDMI_DDC_SCL_PULLUPRESX (bit 24) are set to disable
+	 * internal pull up resistor.
+	 */
+	if (flags & OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP) {
+		control_i2c_1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_I2C_1;
+		reg = omap4_ctrl_pad_readl(control_i2c_1);
+		reg |= (OMAP4_HDMI_DDC_SDA_PULLUPRESX_MASK |
+			OMAP4_HDMI_DDC_SCL_PULLUPRESX_MASK);
+			omap4_ctrl_pad_writel(reg, control_i2c_1);
+	}
 }
 
 static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
@@ -144,10 +160,10 @@ static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
 	return 0;
 }
 
-int omap_hdmi_init(void)
+int omap_hdmi_init(enum omap_hdmi_flags flags)
 {
 	if (cpu_is_omap44xx())
-		omap4_hdmi_mux_pads();
+		omap4_hdmi_mux_pads(flags);
 
 	return 0;
 }
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index c1e3cb0d2c5e..062b3b24ff10 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -200,6 +200,10 @@ enum omap_dss_clk_source {
 	OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI,	/* OMAP4: PLL2_CLK2 */
 };
 
+enum omap_hdmi_flags {
+	OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP = 1 << 0,
+};
+
 /* RFBI */
 
 struct rfbi_timings {
@@ -310,7 +314,7 @@ struct omap_dss_board_info {
 /* Init with the board info */
 extern int omap_display_init(struct omap_dss_board_info *board_data);
 /* HDMI mux init*/
-extern int omap_hdmi_init(void);
+extern int omap_hdmi_init(enum omap_hdmi_flags flags);
 
 struct omap_display_platform_data {
 	struct omap_dss_board_info *board_data;