Display.py revision 14283 
1# Copyright (c) 2019 ARM Limited
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36# Authors: Giacomo Travaglini
37
38from m5.params import *
39from m5.SimObject import SimObject
40from m5.util.fdthelper import *
41
42class Display(SimObject):
43    type = 'Display'
44    cxx_header = "dev/arm/display.hh"
45    clock_frequency = Param.Unsigned("clock-frequency property")
46    hactive = Param.Unsigned("hactive property")
47    vactive = Param.Unsigned("vactive property")
48    hfront_porch = Param.Unsigned("hfront-porch property")
49    hback_porch = Param.Unsigned("hback-porch property")
50    hsync_len = Param.Unsigned("hsync-len property")
51    vfront_porch = Param.Unsigned("vfront-porch property")
52    vback_porch = Param.Unsigned("vback-porch property")
53    vsync_len = Param.Unsigned("vsync-len property")
54
55    _endpoint_node = None
56
57    def endpointPhandle(self):
58        return "encoder_endpoint"
59
60    def endpointNode(self):
61        assert self._endpoint_node is not None
62        return self._endpoint_node
63
64    def generateDeviceTree(self, state):
65        # timing node
66        timing_node = FdtNode(self.timingNode())
67
68        timing_node.append(FdtPropertyWords(
69            "clock-frequency", [self.clock_frequency]))
70        timing_node.append(FdtPropertyWords(
71            "hactive", [self.hactive]))
72        timing_node.append(FdtPropertyWords(
73            "vactive", [self.vactive]))
74        timing_node.append(FdtPropertyWords(
75            "hfront-porch", [self.hfront_porch]))
76        timing_node.append(FdtPropertyWords(
77            "hback-porch", [self.hback_porch]))
78        timing_node.append(FdtPropertyWords(
79            "hsync-len", [self.hsync_len]))
80        timing_node.append(FdtPropertyWords(
81            "vfront-porch", [self.vfront_porch]))
82        timing_node.append(FdtPropertyWords(
83            "vback-porch", [self.vback_porch]))
84        timing_node.append(FdtPropertyWords(
85            "vsync-len", [self.vsync_len]))
86
87        timing_node.appendPhandle(self.timingNode())
88
89        # display timing node
90        dispt_node = FdtNode("display-timings")
91        dispt_node.append(FdtPropertyWords("native-mode",
92            state.phandle(self.timingNode())))
93        dispt_node.append(timing_node)
94
95        # endpoint node
96        endpoint_node = FdtNode("endpoint")
97        endpoint_node.appendPhandle(
98            self.endpointPhandle())
99
100        # Assign node so that it can be retrieved
101        self._endpoint_node = endpoint_node
102
103        # port node
104        port_node = FdtNode("port")
105        port_node.append(endpoint_node)
106
107        # Virt-encoder
108        node = FdtNode("virt-encoder")
109        node.appendCompatible(["drm,virtual-encoder"])
110        node.append(dispt_node)
111        node.append(port_node)
112
113        yield node
114
115class Display1080p(Display):
116    clock_frequency = 148500000
117    hactive = 1920
118    vactive = 1080
119    hfront_porch = 148
120    hback_porch = 88
121    hsync_len = 44
122    vfront_porch = 36
123    vback_porch = 4
124    vsync_len = 5
125
126    def timingNode(self):
127        return "timing_1080p60"
128