Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c21c8c44 authored by Padmanabhan Komanduru's avatar Padmanabhan Komanduru Committed by Gerrit - the friendly Code Review server
Browse files

drm/msm: add a helper function to return the EDID checksum 



Display Port Link Compliance tests expect to return the checksum
of the last block of EDID data. Add a function that returns this
checksum.

Change-Id: I6f316967eecd71f7344a0bb142c641b4ccf6c35f
Signed-off-by: default avatarPadmanabhan Komanduru <pkomandu@codeaurora.org>
parent ef656faf

drivers/gpu/drm/msm/sde_edid_parser.c

+24 −0
Original line number Diff line number Diff line
@@ -605,6 +605,30 @@ u32 sde_get_sink_bpc(void *input) 
	}

}



u8 sde_get_edid_checksum(void *input)

{

	struct sde_edid_ctrl *edid_ctrl = (struct sde_edid_ctrl *)(input);

	struct edid *edid = NULL, *last_block = NULL;

	u8 *raw_edid = NULL;



	if (!edid_ctrl || !edid_ctrl->edid) {

		SDE_ERROR("invalid edid input\n");

		return 0;

	}



	edid = edid_ctrl->edid;



	raw_edid = (u8 *)edid;

	raw_edid += (edid->extensions * EDID_LENGTH);

	last_block = (struct edid *)raw_edid;



	if (last_block)

		return last_block->checksum;



	SDE_ERROR("Invalid block, no checksum\n");

	return 0;

}



bool sde_detect_hdmi_monitor(void *input)

{

	struct sde_edid_ctrl *edid_ctrl = (struct sde_edid_ctrl *)(input);

drivers/gpu/drm/msm/sde_edid_parser.h

+8 −0
Original line number Diff line number Diff line
@@ -145,6 +145,14 @@ bool sde_detect_hdmi_monitor(void *edid_ctrl); 
 */

u32 sde_get_sink_bpc(void *edid_ctrl);



/**

 * sde_get_edid_checksum() - return the checksum of last block of EDID.

 * @input:     Handle to the edid_ctrl structure.

 *

 * Return: checksum of the last EDID block.

 */

u8 sde_get_edid_checksum(void *input);



/**

 * _sde_edid_update_modes() - populate EDID modes.

 * @edid_ctrl:     Handle to the edid_ctrl structure.