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beagle: enable DVI_PUP

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this patch addresses the issue that there is no DVI output on beagleboard-xm in
u-boot; the TFP410 is not powered on, DVI_PUP needs to be set high

this is done differently on beagleboard-xm rev. B/C versus earlier boards:
beagleboard-xm B/C need to set GPIO2 of the TWL4030
earlier boards need to set GPIO170

note that the change occured somewhere inbetween beagleboard-xm rev. A2 and A3

note that beagleboard-xm rev. A and rev. B cannot be distinguished using
get_board_revision(), REVISION_XM_A/REVISION_XM_B is bogus

due to this glitch, the patch cannot work correctly on some beagleboard-xm
rev A/B boards

tested on beagleboard-xm rev. C (you should see orange color on a monitor)

note that the framebuffer is NOT yet set up, this could be done along the
lines below (for 800x480 resolution and RGB24) before calling omap3_dss_enable()

static void configure_frame_buffer() {
	writel(0x80500000, (uint *) 0x48050480); // address
	writel(0x80500000, (uint *) 0x48050484);
	writel(0x01df031f, (uint *) 0x4805048c); // size
	writel(0x00000091, (uint *) 0x480504a0); // RGB24
}

Signed-off-by: Peter Meerwald <p.meerwald@bct-electronic.com>
This commit is contained in:
Peter Meerwald 2012-02-08 05:24:26 +00:00 • committed by Albert ARIBAUD
parent 826e99136e
commit 4258aa62fb
1 changed files with 34 additions and 0 deletions
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34
board/ti/beagle/beagle.c
View file

@ -251,6 +251,38 @@ void beagle_display_init(void)
}
}
/*
* Enable DVI power
*/
static void beagle_dvi_pup() {
uchar val;
switch (get_board_revision()) {
case REVISION_AXBX:
case REVISION_CX:
case REVISION_C4:
case REVISION_XM_A:
gpio_request(170, "");
gpio_direction_output(170, 0);
gpio_set_value(170, 1);
break;
case REVISION_XM_B:
case REVISION_XM_C:
default:
#define GPIODATADIR1 (TWL4030_BASEADD_GPIO+3)
#define GPIODATAOUT1 (TWL4030_BASEADD_GPIO+6)
i2c_read(TWL4030_CHIP_GPIO, GPIODATADIR1, 1, &val, 1);
val |= 4;
i2c_write(TWL4030_CHIP_GPIO, GPIODATADIR1, 1, &val, 1);
i2c_read(TWL4030_CHIP_GPIO, GPIODATAOUT1, 1, &val, 1);
val |= 4;
i2c_write(TWL4030_CHIP_GPIO, GPIODATAOUT1, 1, &val, 1);
break;
}
}
/*
* Routine: misc_init_r
* Description: Configure board specific parts
@ -422,6 +454,8 @@ int misc_init_r(void)
GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
dieid_num_r();
beagle_dvi_pup();
beagle_display_init();
omap3_dss_enable();