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Commit 39a0d669 authored by Abhishek Kharbanda's avatar Abhishek Kharbanda Committed by Stephen Boyd
Browse files

msm: hdmi: Re-read EDID on checksum error. 



Re-read EDID buffer multiple times in case of
checksum error.

Change-Id: I30c9b2245ceb27a7768bf0d9cd9b66c81beff19e
CRs-Fixed: 492053
Signed-off-by: default avatarAbhishek Kharbanda <akharban@codeaurora.org>
parent b1b28fa9

drivers/video/msm/mdss/mdss_hdmi_edid.c

+9 −1
Original line number Diff line number Diff line
@@ -366,8 +366,9 @@ static int hdmi_edid_read_block(struct hdmi_edid_ctrl *edid_ctrl, int block, 
{

	const u8 *b = NULL;

	u32 ndx, check_sum, print_len;

	int block_size = 0x80;

	int block_size;

	int i, status;

	int retry_cnt = 0;

	struct hdmi_tx_ddc_data ddc_data;

	b = edid_buf;
@@ -376,6 +377,9 @@ static int hdmi_edid_read_block(struct hdmi_edid_ctrl *edid_ctrl, int block, 
		return -EINVAL;

	}



read_retry:

	block_size = 0x80;

	status = 0;

	do {

		DEV_DBG("EDID: reading block(%d) with block-size=%d\n",

			block, block_size);
@@ -422,6 +426,10 @@ static int hdmi_edid_read_block(struct hdmi_edid_ctrl *edid_ctrl, int block, 
				ndx, ndx+3,

				b[ndx+0], b[ndx+1], b[ndx+2], b[ndx+3]);

		status = -EPROTO;

		if (retry_cnt++ < 3) {

			DEV_DBG("Retrying reading EDID %d time\n", retry_cnt);

			goto read_retry;

		}

		goto error;

	}