TDA998x EDID

Functions
static int	request_edid_block (struct tda998x_dev *dev)
int	tda998x_read_edid (struct tda998x_dev *dev, uint8_t *data)
int	tda998x_edid_get_block (struct tda998x_dev *dev, uint8_t *block, int nblocks, int len)
	Get EDID Block Data. More...
static int	clear_edid_request (struct tda998x_dev *dev)
int	edid_block_available (struct tda998x_dev *dev, bool *pSendEDIDCallback)

Detailed Description

Function Documentation

tda998x_edid_get_block()

int tda998x_edid_get_block	(	struct tda998x_dev *	dev,
		uint8_t *	block,
		int	nblocks,
		int	len
	)

#include <projects/lib/tda998x.c>

Get EDID Block Data.

Parameters

dev	TDA998x device structure pointer

Returns

0 on success, non-zero error status otherwise

{
    int ret;
    struct tda998x_edid *edid;

    if ((dev == NULL) || (dev->edid == NULL))
        return ERR_NULL_PARAM;

    /* Enable EDID read */
    ret = write_reg(dev, INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
    if (ret < 0)
        return ret;

    edid = dev->edid;

    if (!edid->read_started) {
        /* Reset the EdidStatus in the Device Instance Structure */
        edid->state = EDID_NOT_READ;

        edid->read_started = true;

        /* Reset stored parameters from EDID in the Device Instance Structure */
        dev->sink = SINK_DVI;

        /* Enable the T0 interrupt for detecting the Read_EDID failure */
        ret = write_reg(dev, INT_FLAGS_0, INT_FLAGS_0_T0);
        if (ret < 0)
            return ret;

        /* Launch the read of first EDID block into Device Instance workspace */
        edid->req_id = 0;
        ret = request_edid_block(dev);
        if (ret < 0)
            return ret;
    } else {
        /* Not allowed if read edid is on going */
        return ERR_RESOURCE_NOT_AVAILABLE;
    }

    return 0;
}