+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2012 The Chromium OS Authors.
*
* (C) Copyright 2010
* Petr Stetiar <ynezz@true.cz>
*
- * SPDX-License-Identifier: GPL-2.0+
- *
* Contains stolen code from ddcprobe project which is:
* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
*/
#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) \
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
#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__));
/**
struct display_timing;
+/**
+ * edid_get_timing_validate() - Get basic digital display parameters with
+ * mode selection callback
+ *
+ * @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
+ * @param mode_valid Callback validating mode, returning true is mode is
+ * supported, false otherwise.
+ * @parem valid_priv Pointer to private data for mode_valid callback
+ * @return 0 if timings are OK, -ve on error
+ */
+int edid_get_timing_validate(u8 *buf, int buf_size,
+ struct display_timing *timing,
+ int *panel_bits_per_colourp,
+ bool (*mode_valid)(void *priv,
+ const struct display_timing *timing),
+ void *mode_valid_priv);
+
/**
* edid_get_timing() - Get basic digital display parameters
*