Commit e6853aaf authored by David Ung's avatar David Ung Committed by Tomi Valkeinen
Browse files

video: Check EDID for HDMI connection 



Check EDID Vendor Specific Data Block bytes to see if the connection
is HDMI and set FB_MISC_HDMI.

Signed-off-by: default avatarDavid Ung <davidu@nvidia.com>
Signed-off-by: default avatarChristopher Freeman <cfreeman@nvidia.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent f474f0e1

drivers/video/fbdev/core/fbmon.c

+8 −1
Original line number Diff line number Diff line
@@ -1012,13 +1012,20 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs) 
	while (pos < edid[2]) {

		u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7;

		pr_debug("Data block %u of %u bytes\n", type, len);

		if (type == 2)

		if (type == 2) {

			for (i = pos; i < pos + len; i++) {

				u8 idx = edid[pos + i] & 0x7f;

				svd[svd_n++] = idx;

				pr_debug("N%sative mode #%d\n",

					 edid[pos + i] & 0x80 ? "" : "on-n", idx);

			}

		} else if (type == 3 && len >= 3) {

			/* Check Vendor Specific Data Block.  For HDMI,

			   it is always 00-0C-03 for HDMI Licensing, LLC. */

			if (edid[pos + 1] == 3 && edid[pos + 2] == 0xc &&

			    edid[pos + 3] == 0)

				specs->misc |= FB_MISC_HDMI;

		}

		pos += len + 1;

	}

include/linux/fb.h

+1 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ struct device_node; 


#define FB_MISC_PRIM_COLOR	1

#define FB_MISC_1ST_DETAIL	2	/* First Detailed Timing is preferred */

#define FB_MISC_HDMI		4

struct fb_chroma {

	__u32 redx;	/* in fraction of 1024 */

	__u32 greenx;