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mx: fixes for platform display code

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* cleanup (useless definitions)
* fix IOMUX for reset pin definition (make it a straight boring GPIO)
* add IRQ pin IOMUX (can't believe I missed that)
* add DISP_EN lines from schematics (active low), and knock VGA on the head (might save a few uA)
This commit is contained in:
Matt Sealey
2011-01-26 02:29:47 -06:00
parent 7c7076df28
commit 86e7bc45a7
1 changed files with 34 additions and 18 deletions
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52
arch/arm/mach-mx5/mx51_efikamx_display.c
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@@ -39,29 +39,34 @@
#include "mx51_efikamx.h"
#define VIDEO_MODE_HDMI_DEF 4
#define MEGA 1000000
#define EFIKAMX_DISPLAY_RESET MX51_PIN_DISPB2_SER_DIN
#define EFIKAMX_HDMI_EN MX51_PIN_DI1_D1_CS /*active low*/
#define EFIKAMX_VGA_EN MX51_PIN_DISPB2_SER_CLK /*active low*/
#define EFIKAMX_HDMI_IRQ MX51_PIN_DISPB2_SER_DIO
static struct mxc_iomux_pin_cfg __initdata mx51_efikamx_display_iomux_pins[] = {
/* display reset pin */
{
MX51_PIN_DISPB2_SER_DIN, IOMUX_CONFIG_GPIO,
0,
MUX_IN_GPIO3_IPP_IND_G_IN_5_SELECT_INPUT,
INPUT_CTL_PATH1,
},
{EFIKAMX_DISPLAY_RESET, IOMUX_CONFIG_GPIO,},
{EFIKAMX_HDMI_EN, IOMUX_CONFIG_GPIO, },
{EFIKAMX_HDMI_IRQ, IOMUX_CONFIG_GPIO, },
{EFIKAMX_VGA_EN, IOMUX_CONFIG_GPIO, },
};
int mxcfb_initialized = 0;
void mx51_efikamx_display_reset(void)
{
gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_DISPB2_SER_DIN), 1);
msleep(50); /* SII9022 Treset >= 100us */
gpio_set_value(IOMUX_TO_GPIO(EFIKAMX_DISPLAY_RESET), 1);
msleep(1); /* SII9022 Treset >= 100us */
gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_DISPB2_SER_DIN), 0);
msleep(100);
gpio_set_value(IOMUX_TO_GPIO(EFIKAMX_DISPLAY_RESET), 0);
/*
* this is a very long time, but we need to wait this long for the
* SII9022 to come out of reset *AND* for any hotplug events to have
* registered and a sink detection to be absolutely accurate
* (SII9022 programmer's reference p42:
* Tplug_dly min. 400 typ. 480 max. 600ms)
*/
msleep(600);
}
@@ -93,13 +98,24 @@ void __init mx51_efikamx_init_display(void)
{
CONFIG_IOMUX(mx51_efikamx_display_iomux_pins);
/* DISP_EN# and DISP2_EN# go to a level shifter which we need to turn on */
gpio_free(IOMUX_TO_GPIO(EFIKAMX_HDMI_EN));
gpio_request(IOMUX_TO_GPIO(EFIKAMX_HDMI_EN), "hdmi:enable#");
gpio_direction_output(IOMUX_TO_GPIO(EFIKAMX_HDMI_EN), 0);
gpio_free(IOMUX_TO_GPIO(EFIKAMX_VGA_EN));
gpio_request(IOMUX_TO_GPIO(EFIKAMX_VGA_EN), "vga:enable#");
gpio_direction_output(IOMUX_TO_GPIO(EFIKAMX_VGA_EN), 1);
/* HDMI Reset - Assert for i2c disabled mode */
gpio_request(IOMUX_TO_GPIO(MX51_PIN_DISPB2_SER_DIN), "hdmi:reset");
gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_DISPB2_SER_DIN), 0);
gpio_free(IOMUX_TO_GPIO(EFIKAMX_DISPLAY_RESET));
gpio_request(IOMUX_TO_GPIO(EFIKAMX_DISPLAY_RESET), "hdmi:reset");
gpio_direction_output(IOMUX_TO_GPIO(EFIKAMX_DISPLAY_RESET), 0);
/* HDMI Interrupt pin (plug detect etc.) */
gpio_request(IOMUX_TO_GPIO(MX51_PIN_DISPB2_SER_DIO), "hdmi:irq");
gpio_direction_input(IOMUX_TO_GPIO(MX51_PIN_DISPB2_SER_DIO));
gpio_free(IOMUX_TO_GPIO(EFIKAMX_HDMI_IRQ));
gpio_request(IOMUX_TO_GPIO(EFIKAMX_HDMI_IRQ), "hdmi:irq");
gpio_direction_input(IOMUX_TO_GPIO(EFIKAMX_HDMI_IRQ));
mxc_ipu_data.di_clk[0] = clk_get(NULL, "ipu_di0_clk");
mxc_ipu_data.csi_clk[0] = clk_get(NULL, "csi_mclk1");