X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=include%2Fedid.h;h=f05d2b82f24494eca9b837d71d2c6a496dcf5387;hb=b4f901042807e59061a862adc265d8f899b2243f;hp=4788de9392dd62662ac1fcac726feb64406ef2a4;hpb=612404c28a64a6df300642a1550a65dcc8e01f82;p=u-boot

diff --git a/include/edid.h b/include/edid.h
index 4788de9392..f05d2b82f2 100644
--- a/include/edid.h
+++ b/include/edid.h
@@ -1,30 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2012 The Chromium OS Authors.
  *
  * (C) Copyright 2010
  * Petr Stetiar <ynezz@true.cz>
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
  * Contains stolen code from ddcprobe project which is:
  * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
- *
  */
 
 #ifndef __EDID_H_
@@ -32,6 +14,13 @@
 
 #include <linux/types.h>
 
+/* Size of the EDID data */
+#define EDID_SIZE	128
+#define EDID_EXT_SIZE	256
+
+/* OUI of HDMI vendor specific data block */
+#define HDMI_IEEE_OUI 0x000c03
+
 #define GET_BIT(_x, _pos) \
 	(((_x) >> (_pos)) & 1)
 #define GET_BITS(_x, _pos_msb, _pos_lsb) \
@@ -71,7 +60,7 @@ struct edid_detailed_timing {
 	 (_x).vertical_blanking)
 	unsigned char hsync_offset;
 	unsigned char hsync_pulse_width;
-	unsigned char sync_offset_pulse_width;
+	unsigned char vsync_offset_pulse_width;
 	unsigned char hsync_vsync_offset_pulse_width_hi;
 #define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
 	((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
@@ -103,6 +92,10 @@ struct edid_detailed_timing {
 	GET_BITS((_x).flags, 4, 3)
 #define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
 	GET_BITS((_x).flags, 2, 1)
+#define EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(_x) \
+	GET_BIT((_x).flags, 2)
+#define EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(_x) \
+	GET_BIT((_x).flags, 1)
 #define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
 	GET_BIT((_x).flags, 0)
 } __attribute__ ((__packed__));
@@ -243,6 +236,36 @@ struct edid1_info {
 	unsigned char checksum;
 } __attribute__ ((__packed__));
 
+enum edid_cea861_db_types {
+	EDID_CEA861_DB_AUDIO = 0x01,
+	EDID_CEA861_DB_VIDEO = 0x02,
+	EDID_CEA861_DB_VENDOR = 0x03,
+	EDID_CEA861_DB_SPEAKER = 0x04,
+};
+
+struct edid_cea861_info {
+	unsigned char extension_tag;
+#define EDID_CEA861_EXTENSION_TAG	0x02
+	unsigned char revision;
+	unsigned char dtd_offset;
+	unsigned char dtd_count;
+#define EDID_CEA861_SUPPORTS_UNDERSCAN(_x) \
+	GET_BIT(((_x).dtd_count), 7)
+#define EDID_CEA861_SUPPORTS_BASIC_AUDIO(_x) \
+	GET_BIT(((_x).dtd_count), 6)
+#define EDID_CEA861_SUPPORTS_YUV444(_x) \
+	GET_BIT(((_x).dtd_count), 5)
+#define EDID_CEA861_SUPPORTS_YUV422(_x) \
+	GET_BIT(((_x).dtd_count), 4)
+#define EDID_CEA861_DTD_COUNT(_x) \
+	GET_BITS(((_x).dtd_count), 3, 0)
+	unsigned char data[124];
+#define EDID_CEA861_DB_TYPE(_x, offset) \
+	GET_BITS((_x).data[offset], 7, 5)
+#define EDID_CEA861_DB_LEN(_x, offset) \
+	GET_BITS((_x).data[offset], 4, 0)
+} __attribute__ ((__packed__));
+
 /**
  * Print the EDID info.
  *
@@ -258,6 +281,15 @@ void edid_print_info(struct edid1_info *edid_info);
  */
 int edid_check_info(struct edid1_info *info);
 
+/**
+ * Check checksum of a 128 bytes EDID data block
+ *
+ * @param edid_block	EDID block data
+ *
+ * @return 0 on success, or a negative errno on error
+ */
+int edid_check_checksum(u8 *edid_block);
+
 /**
  * Get the horizontal and vertical rate ranges of the monitor.
  *
@@ -272,4 +304,20 @@ int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
 		    unsigned int *hmax, unsigned int *vmin,
 		    unsigned int *vmax);
 
+struct display_timing;
+
+/**
+ * edid_get_timing() - Get basic digital display parameters
+ *
+ * @param buf		Buffer containing EDID data
+ * @param buf_size	Size of buffer in bytes
+ * @param timing	Place to put preferring timing information
+ * @param panel_bits_per_colourp	Place to put the number of bits per
+ *			colour supported by the panel. This will be set to
+ *			-1 if not available
+ * @return 0 if timings are OK, -ve on error
+ */
+int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing,
+		    int *panel_bits_per_colourp);
+
 #endif /* __EDID_H_ */