ReactOS 0.4.15-dev-7093-g01a8288
edid.c File Reference
#include "vbemp.h"
Include dependency graph for edid.c:

Go to the source code of this file.

Functions

static VOID NTAPI VBEWriteClockLine (PVOID HwDeviceExtension, UCHAR data)
 
static VOID NTAPI VBEWriteDataLine (PVOID HwDeviceExtension, UCHAR data)
 
static BOOLEAN NTAPI VBEReadClockLine (PVOID HwDeviceExtension)
 
static BOOLEAN NTAPI VBEReadDataLine (PVOID HwDeviceExtension)
 
static BOOLEAN VBEReadEdidUsingSCI (IN PVOID HwDeviceExtension, IN ULONG ChildIndex, OUT PVOID Edid)
 
static BOOLEAN VBEReadEdid (IN PVBE_DEVICE_EXTENSION VBEDeviceExtension, IN ULONG ChildIndex, OUT PVOID Edid)
 
VP_STATUS NTAPI VBEGetVideoChildDescriptor (IN PVOID HwDeviceExtension, IN PVIDEO_CHILD_ENUM_INFO ChildEnumInfo, OUT PVIDEO_CHILD_TYPE VideoChildType, OUT PUCHAR pChildDescriptor, OUT PULONG UId, OUT PULONG pUnused)
 

Function Documentation

◆ VBEGetVideoChildDescriptor()

VP_STATUS NTAPI VBEGetVideoChildDescriptor ( IN PVOID  HwDeviceExtension,
IN PVIDEO_CHILD_ENUM_INFO  ChildEnumInfo,
OUT PVIDEO_CHILD_TYPE  VideoChildType,
OUT PUCHAR  pChildDescriptor,
OUT PULONG  UId,
OUT PULONG  pUnused 
)

Definition at line 230 of file edid.c.

237{
238 if (ChildEnumInfo->Size != sizeof(VIDEO_CHILD_ENUM_INFO) ||
239 ChildEnumInfo->ChildDescriptorSize < MAX_SIZE_OF_EDID)
240 {
242 }
243
244 if (ChildEnumInfo->ChildIndex == 0)
245 {
246 /* We don't support enumeration of ACPI children */
248 }
249 else if (ChildEnumInfo->ChildIndex == 1)
250 {
251 /* Our screen */
252 *VideoChildType = Monitor;
253 *UId = 1;
254
255 /* Try to read EDID information using 2 different methods. */
256 if (VBEReadEdid(HwDeviceExtension, 0, pChildDescriptor))
257 {
258 VideoPortDebugPrint(Info, "VBEMP: EDID information read directly\n");
259 }
260 else if (VBEReadEdidUsingSCI(HwDeviceExtension, 0, pChildDescriptor))
261 {
262 VideoPortDebugPrint(Info, "VBEMP: EDID information read using I2C\n");
263 }
264
266 }
267 else
268 {
269 /* Unknown hardware id */
271 }
272}
#define ERROR_NO_MORE_DEVICES
Definition: dderror.h:18
#define ERROR_INVALID_FUNCTION
Definition: dderror.h:6
static BOOLEAN VBEReadEdid(IN PVBE_DEVICE_EXTENSION VBEDeviceExtension, IN ULONG ChildIndex, OUT PVOID Edid)
Definition: edid.c:178
static BOOLEAN VBEReadEdidUsingSCI(IN PVOID HwDeviceExtension, IN ULONG ChildIndex, OUT PVOID Edid)
Definition: edid.c:105
VPAPI VOID __cdecl VideoPortDebugPrint(IN VIDEO_DEBUG_LEVEL DebugPrintLevel, IN PSTR DebugMessage, IN ...)
@ Monitor
Definition: video.h:270
#define VIDEO_ENUM_MORE_DEVICES
Definition: video.h:139
#define MAX_SIZE_OF_EDID
Definition: vbemp.h:187
_Must_inspect_result_ _In_ WDFCHILDLIST _In_ PWDF_CHILD_LIST_ITERATOR _Out_ WDFDEVICE _Inout_opt_ PWDF_CHILD_RETRIEVE_INFO Info
Definition: wdfchildlist.h:690

Referenced by DriverEntry().

◆ VBEReadClockLine()

static BOOLEAN NTAPI VBEReadClockLine ( PVOID  HwDeviceExtension)
static

Definition at line 67 of file edid.c.

69{
70 INT10_BIOS_ARGUMENTS BiosRegisters;
71 PVBE_DEVICE_EXTENSION VBEDeviceExtension =
72 (PVBE_DEVICE_EXTENSION)HwDeviceExtension;
73
74 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
75 BiosRegisters.Eax = VBE_DDC;
76 BiosRegisters.Ebx = VBE_DDC_READ_SCL_CLOCK_LINE;
77 BiosRegisters.Ecx = VBEDeviceExtension->CurrentChildIndex;
78 VBEDeviceExtension->Int10Interface.Int10CallBios(
79 VBEDeviceExtension->Int10Interface.Context,
80 &BiosRegisters);
81
82 return BiosRegisters.Edx;
83}
VPAPI VOID NTAPI VideoPortZeroMemory(IN PVOID Destination, IN ULONG Length)
VIDEO_PORT_INT10_INTERFACE Int10Interface
Definition: vbemp.h:194
ULONG CurrentChildIndex
Definition: vbemp.h:210
OUT PINT10_CALL_BIOS Int10CallBios
Definition: video.h:790
#define VBE_DDC
Definition: vbemp.h:67
#define VBE_DDC_READ_SCL_CLOCK_LINE
Definition: vbemp.h:79
struct VBE_DEVICE_EXTENSION * PVBE_DEVICE_EXTENSION

Referenced by VBEReadEdidUsingSCI().

◆ VBEReadDataLine()

static BOOLEAN NTAPI VBEReadDataLine ( PVOID  HwDeviceExtension)
static

Definition at line 86 of file edid.c.

88{
89 INT10_BIOS_ARGUMENTS BiosRegisters;
90 PVBE_DEVICE_EXTENSION VBEDeviceExtension =
91 (PVBE_DEVICE_EXTENSION)HwDeviceExtension;
92
93 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
94 BiosRegisters.Eax = VBE_DDC;
95 BiosRegisters.Ebx = VBE_DDC_READ_SDA_DATA_LINE;
96 BiosRegisters.Ecx = VBEDeviceExtension->CurrentChildIndex;
97 VBEDeviceExtension->Int10Interface.Int10CallBios(
98 VBEDeviceExtension->Int10Interface.Context,
99 &BiosRegisters);
100
101 return BiosRegisters.Edx;
102}
#define VBE_DDC_READ_SDA_DATA_LINE
Definition: vbemp.h:80

Referenced by VBEReadEdidUsingSCI().

◆ VBEReadEdid()

static BOOLEAN VBEReadEdid ( IN PVBE_DEVICE_EXTENSION  VBEDeviceExtension,
IN ULONG  ChildIndex,
OUT PVOID  Edid 
)
static

Definition at line 178 of file edid.c.

182{
183 INT10_BIOS_ARGUMENTS BiosRegisters;
184
185 VideoPortDebugPrint(Trace, "VBEMP: VBEReadEdid() called\n");
186
187 /*
188 * Check if DDC1/DDC2 is supported
189 */
190 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
191 BiosRegisters.Eax = VBE_DDC;
192 VBEDeviceExtension->Int10Interface.Int10CallBios(
193 VBEDeviceExtension->Int10Interface.Context,
194 &BiosRegisters);
195 if (VBE_GETRETURNCODE(BiosRegisters.Eax) != VBE_SUCCESS)
196 return FALSE;
197 if ((BiosRegisters.Ebx & 3) == 0)
198 return FALSE;
199
200 /*
201 * Directly read EDID information
202 */
203 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
204 BiosRegisters.Eax = VBE_DDC;
205 BiosRegisters.Ebx = VBE_DDC_READ_EDID;
206 BiosRegisters.Ecx = ChildIndex;
207 BiosRegisters.Edi = VBEDeviceExtension->TrampolineMemoryOffset;
208 BiosRegisters.SegEs = VBEDeviceExtension->TrampolineMemorySegment;
209 VBEDeviceExtension->Int10Interface.Int10CallBios(
210 VBEDeviceExtension->Int10Interface.Context,
211 &BiosRegisters);
212
213 if (VBE_GETRETURNCODE(BiosRegisters.Eax) != VBE_SUCCESS)
214 return FALSE;
215
216 /*
217 * Copy the EDID information to our buffer
218 */
219 VBEDeviceExtension->Int10Interface.Int10ReadMemory(
220 VBEDeviceExtension->Int10Interface.Context,
221 VBEDeviceExtension->TrampolineMemorySegment,
222 VBEDeviceExtension->TrampolineMemoryOffset,
223 Edid,
225
226 return TRUE;
227}
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
#define Trace(x)
Definition: inflate.c:42
#define VBE_SUCCESS
Definition: vbemp.h:95
#define VBE_GETRETURNCODE(x)
Definition: vbemp.h:100
#define VBE_DDC_READ_EDID
Definition: vbemp.h:73

Referenced by VBEGetVideoChildDescriptor().

◆ VBEReadEdidUsingSCI()

static BOOLEAN VBEReadEdidUsingSCI ( IN PVOID  HwDeviceExtension,
IN ULONG  ChildIndex,
OUT PVOID  Edid 
)
static

Definition at line 105 of file edid.c.

109{
110 INT10_BIOS_ARGUMENTS BiosRegisters;
111 PVBE_DEVICE_EXTENSION VBEDeviceExtension =
112 (PVBE_DEVICE_EXTENSION)HwDeviceExtension;
113 DDC_CONTROL DDCControl;
114 BOOLEAN ret;
115
116 VideoPortDebugPrint(Trace, "VBEMP: VBEReadEdidUsingSCI() called\n");
117
118 /*
119 * Check if graphic card support IC interface
120 */
121 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
122 BiosRegisters.Eax = VBE_DDC;
123 BiosRegisters.Ebx = VBE_DDC_REPORT_CAPABILITIES;
124 BiosRegisters.Ecx = ChildIndex;
125 VBEDeviceExtension->Int10Interface.Int10CallBios(
126 VBEDeviceExtension->Int10Interface.Context,
127 &BiosRegisters);
128 if (VBE_GETRETURNCODE(BiosRegisters.Eax) != VBE_SUCCESS)
129 return FALSE;
130 VideoPortDebugPrint(Info, "VBEMP: VBE/SCI version %x\n", BiosRegisters.Ecx);
131 if ((BiosRegisters.Ebx & 0xF) != 0xF)
132 return FALSE;
133
134 /*
135 * Enable IC interface
136 */
137 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
138 BiosRegisters.Eax = VBE_DDC;
139 BiosRegisters.Ebx = VBE_DDC_BEGIN_SCL_SDA_CONTROL;
140 BiosRegisters.Ecx = ChildIndex;
141 VBEDeviceExtension->Int10Interface.Int10CallBios(
142 VBEDeviceExtension->Int10Interface.Context,
143 &BiosRegisters);
144 if (VBE_GETRETURNCODE(BiosRegisters.Eax) != VBE_SUCCESS)
145 return FALSE;
146
147 /*
148 * Read EDID information
149 */
150 VBEDeviceExtension->CurrentChildIndex = ChildIndex;
151 DDCControl.Size = sizeof(DDC_CONTROL);
156 DDCControl.EdidSegment = 0;
158 HwDeviceExtension,
159 &DDCControl,
160 (PUCHAR)&Edid,
162
163 /*
164 * Disable IC interface
165 */
166 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
167 BiosRegisters.Eax = VBE_DDC;
168 BiosRegisters.Ebx = VBE_DDC_END_SCL_SDA_CONTROL;
169 VBEDeviceExtension->Int10Interface.Int10CallBios(
170 VBEDeviceExtension->Int10Interface.Context,
171 &BiosRegisters);
172 /* Ignore the possible error, as we did our best to prevent problems */
173
174 return ret;
175}
unsigned char BOOLEAN
static VOID NTAPI VBEWriteClockLine(PVOID HwDeviceExtension, UCHAR data)
Definition: edid.c:29
static BOOLEAN NTAPI VBEReadClockLine(PVOID HwDeviceExtension)
Definition: edid.c:67
static BOOLEAN NTAPI VBEReadDataLine(PVOID HwDeviceExtension)
Definition: edid.c:86
static VOID NTAPI VBEWriteDataLine(PVOID HwDeviceExtension, UCHAR data)
Definition: edid.c:48
VPAPI BOOLEAN NTAPI VideoPortDDCMonitorHelper(IN PVOID HwDeviceExtension, IN PVOID DDCControl, IN OUT PUCHAR EdidBuffer, IN ULONG EdidBufferSize)
struct _DDC_CONTROL DDC_CONTROL
IN UCHAR EdidSegment
Definition: video.h:708
IN ULONG Size
Definition: video.h:706
IN I2C_CALLBACKS I2CCallbacks
Definition: video.h:707
IN PVIDEO_READ_CLOCK_LINE ReadClockLine
Definition: video.h:372
IN PVIDEO_WRITE_DATA_LINE WriteDataLine
Definition: video.h:371
IN PVIDEO_READ_DATA_LINE ReadDataLine
Definition: video.h:373
IN PVIDEO_WRITE_CLOCK_LINE WriteClockLine
Definition: video.h:370
unsigned char * PUCHAR
Definition: typedefs.h:53
#define VBE_DDC_BEGIN_SCL_SDA_CONTROL
Definition: vbemp.h:75
#define VBE_DDC_REPORT_CAPABILITIES
Definition: vbemp.h:74
#define VBE_DDC_END_SCL_SDA_CONTROL
Definition: vbemp.h:76
int ret

Referenced by VBEGetVideoChildDescriptor().

◆ VBEWriteClockLine()

static VOID NTAPI VBEWriteClockLine ( PVOID  HwDeviceExtension,
UCHAR  data 
)
static

Definition at line 29 of file edid.c.

32{
33 INT10_BIOS_ARGUMENTS BiosRegisters;
34 PVBE_DEVICE_EXTENSION VBEDeviceExtension =
35 (PVBE_DEVICE_EXTENSION)HwDeviceExtension;
36
37 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
38 BiosRegisters.Eax = VBE_DDC;
39 BiosRegisters.Ebx = VBE_DDC_WRITE_SCL_CLOCK_LINE;
40 BiosRegisters.Ecx = VBEDeviceExtension->CurrentChildIndex;
41 BiosRegisters.Edx = data;
42 VBEDeviceExtension->Int10Interface.Int10CallBios(
43 VBEDeviceExtension->Int10Interface.Context,
44 &BiosRegisters);
45}
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
#define VBE_DDC_WRITE_SCL_CLOCK_LINE
Definition: vbemp.h:77

Referenced by VBEReadEdidUsingSCI().

◆ VBEWriteDataLine()

static VOID NTAPI VBEWriteDataLine ( PVOID  HwDeviceExtension,
UCHAR  data 
)
static

Definition at line 48 of file edid.c.

51{
52 INT10_BIOS_ARGUMENTS BiosRegisters;
53 PVBE_DEVICE_EXTENSION VBEDeviceExtension =
54 (PVBE_DEVICE_EXTENSION)HwDeviceExtension;
55
56 VideoPortZeroMemory(&BiosRegisters, sizeof(BiosRegisters));
57 BiosRegisters.Eax = VBE_DDC;
58 BiosRegisters.Ebx = VBE_DDC_WRITE_SDA_DATA_LINE;
59 BiosRegisters.Ecx = VBEDeviceExtension->CurrentChildIndex;
60 BiosRegisters.Edx = data;
61 VBEDeviceExtension->Int10Interface.Int10CallBios(
62 VBEDeviceExtension->Int10Interface.Context,
63 &BiosRegisters);
64}
#define VBE_DDC_WRITE_SDA_DATA_LINE
Definition: vbemp.h:78

Referenced by VBEReadEdidUsingSCI().