video: Check EDID for HDMI connection (e6853aaf) · Commits · 戴 / test

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;
		}

+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;