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OMAP4: PandaBoard: Adding DVI support
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Adding DVI support to OMAP4 PandaBoard.

PandaBoard uses TFP410 DVI Framer chip
http://focus.ti.com/lit/ds/symlink/tfp410.pdf

The TFP410 gets its power enable and display data over GPIO lines muxed
in from OMAP4430. PandaBoard supports other LCD displays through
expansion
connectors, following board rework. This will disable the DVI interface.
However, the existing mux settings remain the same

PandaBoard additionally supports display over HDMI interface. It is
mutually exclusive to display over DVI. Hence the mux settings need to
be
configured seperately, as and when HDMI is enabled

Also, I2C3 bus used for reading EDID data from DVI Monitors is
registered here. Since the design is similar to BeagleBoard, the code
for the same is taken from the kernel.org commit e3333f4
(omap: Adding beagle i2c eeprom driver to read EDID)

Reviewed-by: Manjunath G Kondaiah <[email protected]>
Reviewed-by: Anand Gadiyar <[email protected]>
Reviewed-by: Nishanth Menon <[email protected]>
Reviewed-by: Sumit Semwal <[email protected]>
Signed-off-by: Raghuveer Murthy <[email protected]>
[[email protected]: fixed conflicts with HDMI]
Signed-off-by: Tomi Valkeinen <[email protected]>
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@tomba
Murthy, Raghuveer authored and tomba committed Mar 18, 2011
1 parent 2de1108 commit b295d6e
Showing 1 changed file with 129 additions and 2 deletions.
131 changes: 129 additions & 2 deletions arch/arm/mach-omap2/board-omap4panda.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@
#include <plat/common.h>
#include <plat/usb.h>
#include <plat/mmc.h>
#include <plat/panel-generic-dpi.h>
#include "timer-gp.h"

#include "hsmmc.h"
Expand Down Expand Up @@ -435,6 +436,17 @@ static struct i2c_board_info __initdata omap4_panda_i2c_boardinfo[] = {
.platform_data = &omap4_panda_twldata,
},
};

/*
* Display monitor features are burnt in their EEPROM as EDID data. The EEPROM
* is connected as I2C slave device, and can be accessed at address 0x50
*/
static struct i2c_board_info __initdata panda_i2c_eeprom[] = {
{
I2C_BOARD_INFO("eeprom", 0x50),
},
};

static int __init omap4_panda_i2c_init(void)
{
/*
Expand All @@ -444,7 +456,12 @@ static int __init omap4_panda_i2c_init(void)
omap_register_i2c_bus(1, 400, omap4_panda_i2c_boardinfo,
ARRAY_SIZE(omap4_panda_i2c_boardinfo));
omap_register_i2c_bus(2, 400, NULL, 0);
omap_register_i2c_bus(3, 400, NULL, 0);
/*
* Bus 3 is attached to the DVI port where devices like the pico DLP
* projector don't work reliably with 400kHz
*/
omap_register_i2c_bus(3, 100, panda_i2c_eeprom,
ARRAY_SIZE(panda_i2c_eeprom));
omap_register_i2c_bus(4, 400, NULL, 0);
return 0;
}
Expand All @@ -464,12 +481,115 @@ static struct omap_board_mux board_mux[] __initdata = {
OMAP4_MUX(SDMMC5_DAT1, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLUP),
OMAP4_MUX(SDMMC5_DAT2, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLUP),
OMAP4_MUX(SDMMC5_DAT3, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLUP),
/* gpio 0 - TFP410 PD */
OMAP4_MUX(KPD_COL1, OMAP_PIN_OUTPUT | OMAP_MUX_MODE3),
/* dispc2_data23 */
OMAP4_MUX(USBB2_ULPITLL_STP, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data22 */
OMAP4_MUX(USBB2_ULPITLL_DIR, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data21 */
OMAP4_MUX(USBB2_ULPITLL_NXT, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data20 */
OMAP4_MUX(USBB2_ULPITLL_DAT0, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data19 */
OMAP4_MUX(USBB2_ULPITLL_DAT1, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data18 */
OMAP4_MUX(USBB2_ULPITLL_DAT2, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data15 */
OMAP4_MUX(USBB2_ULPITLL_DAT3, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data14 */
OMAP4_MUX(USBB2_ULPITLL_DAT4, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data13 */
OMAP4_MUX(USBB2_ULPITLL_DAT5, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data12 */
OMAP4_MUX(USBB2_ULPITLL_DAT6, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data11 */
OMAP4_MUX(USBB2_ULPITLL_DAT7, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data10 */
OMAP4_MUX(DPM_EMU3, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data9 */
OMAP4_MUX(DPM_EMU4, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data16 */
OMAP4_MUX(DPM_EMU5, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data17 */
OMAP4_MUX(DPM_EMU6, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_hsync */
OMAP4_MUX(DPM_EMU7, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_pclk */
OMAP4_MUX(DPM_EMU8, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_vsync */
OMAP4_MUX(DPM_EMU9, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_de */
OMAP4_MUX(DPM_EMU10, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data8 */
OMAP4_MUX(DPM_EMU11, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data7 */
OMAP4_MUX(DPM_EMU12, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data6 */
OMAP4_MUX(DPM_EMU13, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data5 */
OMAP4_MUX(DPM_EMU14, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data4 */
OMAP4_MUX(DPM_EMU15, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data3 */
OMAP4_MUX(DPM_EMU16, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data2 */
OMAP4_MUX(DPM_EMU17, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data1 */
OMAP4_MUX(DPM_EMU18, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
/* dispc2_data0 */
OMAP4_MUX(DPM_EMU19, OMAP_PIN_OUTPUT | OMAP_MUX_MODE5),
{ .reg_offset = OMAP_MUX_TERMINATOR },
};
#else
#define board_mux NULL
#endif

/* Display DVI */
#define PANDA_DVI_TFP410_POWER_DOWN_GPIO 0

static int omap4_panda_enable_dvi(struct omap_dss_device *dssdev)
{
gpio_set_value(dssdev->reset_gpio, 1);
return 0;
}

static void omap4_panda_disable_dvi(struct omap_dss_device *dssdev)
{
gpio_set_value(dssdev->reset_gpio, 0);
}

/* Using generic display panel */
static struct panel_generic_dpi_data omap4_dvi_panel = {
.name = "generic",
.platform_enable = omap4_panda_enable_dvi,
.platform_disable = omap4_panda_disable_dvi,
};

struct omap_dss_device omap4_panda_dvi_device = {
.type = OMAP_DISPLAY_TYPE_DPI,
.name = "dvi",
.driver_name = "generic_dpi_panel",
.data = &omap4_dvi_panel,
.phy.dpi.data_lines = 24,
.reset_gpio = PANDA_DVI_TFP410_POWER_DOWN_GPIO,
.channel = OMAP_DSS_CHANNEL_LCD2,
};

int __init omap4_panda_dvi_init(void)
{
int r;

/* Requesting TFP410 DVI GPIO and disabling it, at bootup */
r = gpio_request_one(omap4_panda_dvi_device.reset_gpio,
GPIOF_OUT_INIT_LOW, "DVI PD");
if (r)
pr_err("Failed to get DVI powerdown GPIO\n");

return r;
}


static void omap4_panda_hdmi_mux_init(void)
{
/* PAD0_HDMI_HPD_PAD1_HDMI_CEC */
Expand Down Expand Up @@ -525,17 +645,24 @@ static struct omap_dss_device omap4_panda_hdmi_device = {
};

static struct omap_dss_device *omap4_panda_dss_devices[] = {
&omap4_panda_dvi_device,
&omap4_panda_hdmi_device,
};

static struct omap_dss_board_info omap4_panda_dss_data = {
.num_devices = ARRAY_SIZE(omap4_panda_dss_devices),
.devices = omap4_panda_dss_devices,
.default_device = &omap4_panda_hdmi_device,
.default_device = &omap4_panda_dvi_device,
};

void omap4_panda_display_init(void)
{
int r;

r = omap4_panda_dvi_init();
if (r)
pr_err("error initializing panda DVI\n");

omap4_panda_hdmi_mux_init();
omap_display_init(&omap4_panda_dss_data);
}
Expand Down

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