xref: /openbmc/qemu/include/hw/display/i2c-ddc.h (revision 448058aa)
1 /* A simple I2C slave for returning monitor EDID data via DDC.
2  *
3  * Copyright (c) 2011 Linaro Limited
4  * Written by Peter Maydell
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License version 2 as
8  *  published by the Free Software Foundation.
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *  GNU General Public License for more details.
14  *
15  *  You should have received a copy of the GNU General Public License along
16  *  with this program; if not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #ifndef I2C_DDC_H
20 #define I2C_DDC_H
21 
22 #include "hw/display/edid.h"
23 #include "hw/i2c/i2c.h"
24 #include "qom/object.h"
25 
26 /* A simple I2C slave which just returns the contents of its EDID blob. */
27 struct I2CDDCState {
28     /*< private >*/
29     I2CSlave i2c;
30     /*< public >*/
31     bool firstbyte;
32     uint8_t reg;
33     qemu_edid_info edid_info;
34     uint8_t edid_blob[128];
35 };
36 
37 typedef struct I2CDDCState I2CDDCState;
38 
39 #define TYPE_I2CDDC "i2c-ddc"
40 DECLARE_INSTANCE_CHECKER(I2CDDCState, I2CDDC,
41                          TYPE_I2CDDC)
42 
43 #endif /* I2C_DDC_H */
44