Add the files

1 files changed, 244 insertions, 0 deletions

diff --git a/src/detection/brightness/brightness_apple.c b/src/detection/brightness/brightness_apple.c
new file mode 100644
index 0000000..5dd12b2
--- /dev/null
+++ b/src/detection/brightness/brightness_apple.c
@@ -0,0 +1,244 @@
+#include "brightness.h"
+#include "detection/displayserver/displayserver.h"
+#include "common/apple/cf_helpers.h"
+#include "common/edidHelper.h"
+#include "common/time.h"
+
+#include <CoreGraphics/CoreGraphics.h>
+
+// DDC/CI
+#ifdef __aarch64__
+typedef CFTypeRef IOAVServiceRef;
+extern IOAVServiceRef IOAVServiceCreate(CFAllocatorRef allocator) FF_A_WEAK_IMPORT;
+extern IOAVServiceRef IOAVServiceCreateWithService(CFAllocatorRef allocator, io_service_t service) FF_A_WEAK_IMPORT;
+extern IOReturn IOAVServiceCopyEDID(IOAVServiceRef service, CFDataRef* x2) FF_A_WEAK_IMPORT;
+extern IOReturn IOAVServiceReadI2C(IOAVServiceRef service, uint32_t chipAddress, uint32_t offset, void* outputBuffer, uint32_t outputBufferSize) FF_A_WEAK_IMPORT;
+extern IOReturn IOAVServiceWriteI2C(IOAVServiceRef service, uint32_t chipAddress, uint32_t dataAddress, void* inputBuffer, uint32_t inputBufferSize) FF_A_WEAK_IMPORT;
+#else
+    // DDC/CI (Intel)
+    #include <IOKit/IOKitLib.h>
+    #include <IOKit/graphics/IOGraphicsLib.h>
+    #include <IOKit/i2c/IOI2CInterface.h>
+extern void CGSServiceForDisplayNumber(CGDirectDisplayID display, io_service_t* service) FF_A_WEAK_IMPORT;
+#endif
+
+// ACPI
+extern int DisplayServicesGetBrightness(CGDirectDisplayID display, float* brightness) FF_A_WEAK_IMPORT;
+
+// Works for internal display
+static const char* detectWithDisplayServices(const FFDisplayServerResult* displayServer, FFlist* result) {
+    if (DisplayServicesGetBrightness == NULL) {
+        return "DisplayServices function DisplayServicesGetBrightness is not available";
+    }
+
+    FF_LIST_FOR_EACH (FFDisplayResult, display, displayServer->displays) {
+        if (display->type == FF_DISPLAY_TYPE_BUILTIN || display->type == FF_DISPLAY_TYPE_UNKNOWN) {
+            float value;
+            if (DisplayServicesGetBrightness((CGDirectDisplayID) display->id, &value) == kCGErrorSuccess) {
+                FFBrightnessResult* brightness = FF_LIST_ADD(FFBrightnessResult, *result);
+                brightness->current = value;
+                brightness->max = 1;
+                brightness->min = 0;
+                ffStrbufInitCopy(&brightness->name, &display->name);
+                brightness->builtin = true;
+            }
+        }
+    }
+
+    return NULL;
+}
+
+#ifdef __aarch64__
+// https://github.com/waydabber/m1ddc
+// Works for Apple Silicon and USB-C adapter connection ( but not HTMI )
+static const char* detectWithDdcci(FF_A_UNUSED const FFDisplayServerResult* displayServer, FFBrightnessOptions* options, FFlist* result) {
+    if (!IOAVServiceCreate || !IOAVServiceReadI2C || !IOAVServiceWriteI2C) {
+        return "IOAVService is not available";
+    }
+
+    FF_IOOBJECT_AUTO_RELEASE io_iterator_t iterator = IO_OBJECT_NULL;
+    if (IOServiceGetMatchingServices(MACH_PORT_NULL, IOServiceMatching("DCPAVServiceProxy"), &iterator) != kIOReturnSuccess) {
+        return "IOServiceGetMatchingServices() failed";
+    }
+
+    io_registry_entry_t registryEntry;
+    while ((registryEntry = IOIteratorNext(iterator)) != IO_OBJECT_NULL) {
+        FF_CFTYPE_AUTO_RELEASE IOAVServiceRef service = NULL;
+        {
+            FF_IOOBJECT_AUTO_RELEASE io_registry_entry_t entryAv = registryEntry;
+
+            FF_CFTYPE_AUTO_RELEASE CFBooleanRef IOAVServiceUserInterfaceSupported = IORegistryEntryCreateCFProperty(entryAv, CFSTR("IOAVServiceUserInterfaceSupported"), kCFAllocatorDefault, kNilOptions);
+            if (IOAVServiceUserInterfaceSupported && !CFBooleanGetValue(IOAVServiceUserInterfaceSupported)) {
+                // IOAVServiceCreateWithService won't work
+                continue;
+            }
+
+            FF_CFTYPE_AUTO_RELEASE CFStringRef location = IORegistryEntryCreateCFProperty(entryAv, CFSTR("Location"), kCFAllocatorDefault, kNilOptions);
+            if (location && CFStringCompare(location, CFSTR("Embedded"), 0) == 0) {
+                // Builtin display should be handled by DisplayServices
+                continue;
+            }
+
+            service = IOAVServiceCreateWithService(kCFAllocatorDefault, (io_service_t) registryEntry);
+            if (!service) {
+                continue;
+            }
+        }
+
+        {
+            uint8_t i2cIn[4] = { FF_DDC_CI_MAKE_HEADER(2), FF_DDC_CI_GET_VCP, FF_DDC_CI_LUMINANCE_OPCODE };
+            i2cIn[3] = FF_DDC_CI_WRITE_ADDR ^ i2cIn[0] ^ i2cIn[1] ^ i2cIn[2];
+
+            for (uint32_t i = 0; i < 2; ++i) {
+                IOAVServiceWriteI2C(service, FF_DDC_CI_ADDR, FF_DDC_CI_VCP_COMMAND, i2cIn, ARRAY_SIZE(i2cIn));
+                ffTimeSleep(options->ddcciSleep);
+            }
+        }
+
+        uint8_t i2cOut[12] = {};
+        if (IOAVServiceReadI2C(service, FF_DDC_CI_ADDR, FF_DDC_CI_VCP_COMMAND, i2cOut, ARRAY_SIZE(i2cOut)) == KERN_SUCCESS) {
+            if (i2cOut[2] != 0x02 || i2cOut[3] != 0x00) {
+                continue;
+            }
+
+            uint32_t current = ((uint32_t) i2cOut[8] << 8u) + (uint32_t) i2cOut[9];
+            uint32_t max = ((uint32_t) i2cOut[6] << 8u) + (uint32_t) i2cOut[7];
+
+            FFBrightnessResult* brightness = FF_LIST_ADD(FFBrightnessResult, *result);
+            brightness->max = max;
+            brightness->min = 0;
+            brightness->current = current;
+            ffStrbufInit(&brightness->name);
+            brightness->builtin = false;
+
+            uint8_t edid[128] = {};
+            if (IOAVServiceReadI2C(service, 0x50, 0x00, edid, ARRAY_SIZE(edid)) == KERN_SUCCESS) {
+                ffEdidGetName(edid, &brightness->name);
+            }
+        }
+    }
+
+    return NULL;
+}
+#else
+static IOOptionBits getSupportedTransactionType(void) {
+    FF_IOOBJECT_AUTO_RELEASE io_iterator_t iterator = IO_OBJECT_NULL;
+
+    if (IOServiceGetMatchingServices(MACH_PORT_NULL, IOServiceNameMatching("IOFramebufferI2CInterface"), &iterator) != KERN_SUCCESS) {
+        return kIOI2CNoTransactionType;
+    }
+
+    io_registry_entry_t registryEntry;
+    while ((registryEntry = IOIteratorNext(iterator)) != MACH_PORT_NULL) {
+        FF_IOOBJECT_AUTO_RELEASE io_service_t io_service = registryEntry;
+        FF_CFTYPE_AUTO_RELEASE CFNumberRef IOI2CTransactionTypes = IORegistryEntryCreateCFProperty(io_service, CFSTR(kIOI2CTransactionTypesKey), kCFAllocatorDefault, kNilOptions);
+
+        if (IOI2CTransactionTypes) {
+            int64_t types = 0;
+            ffCfNumGetInt64(IOI2CTransactionTypes, &types);
+
+            if (types) {
+                if ((1 << kIOI2CDDCciReplyTransactionType) & (uint64_t) types) {
+                    return kIOI2CDDCciReplyTransactionType;
+                }
+                if ((1 << kIOI2CSimpleTransactionType) & (uint64_t) types) {
+                    return kIOI2CSimpleTransactionType;
+                }
+            }
+        }
+        break;
+    }
+
+    return kIOI2CNoTransactionType;
+}
+
+static const char* detectWithDdcci(const FFDisplayServerResult* displayServer, FFBrightnessOptions* options, FFlist* result) {
+    if (!CGSServiceForDisplayNumber) {
+        return "CGSServiceForDisplayNumber is not available";
+    }
+    IOOptionBits transactionType = getSupportedTransactionType();
+    if (transactionType == kIOI2CNoTransactionType) {
+        return "No supported IOI2C transaction type found";
+    }
+
+    FF_LIST_FOR_EACH (FFDisplayResult, display, displayServer->displays) {
+        if (display->type == FF_DISPLAY_TYPE_EXTERNAL) {
+            FF_IOOBJECT_AUTO_RELEASE io_service_t framebuffer = IO_OBJECT_NULL;
+            CGSServiceForDisplayNumber((CGDirectDisplayID) display->id, &framebuffer);
+            if (framebuffer == IO_OBJECT_NULL) {
+                continue;
+            }
+
+            IOItemCount count;
+            if (IOFBGetI2CInterfaceCount(framebuffer, &count) != KERN_SUCCESS || count == 0) {
+                continue;
+            }
+
+            for (IOItemCount bus = 0; bus < count; ++bus) {
+                FF_IOOBJECT_AUTO_RELEASE io_service_t interface = IO_OBJECT_NULL;
+                if (IOFBCopyI2CInterfaceForBus(framebuffer, bus, &interface) != KERN_SUCCESS) {
+                    continue;
+                }
+
+                uint8_t i2cOut[12] = {};
+                IOI2CConnectRef connect = NULL;
+                if (IOI2CInterfaceOpen(interface, kNilOptions, &connect) != KERN_SUCCESS) {
+                    continue;
+                }
+
+                uint8_t i2cIn[] = { FF_DDC_CI_VCP_COMMAND, FF_DDC_CI_MAKE_HEADER(2), FF_DDC_CI_GET_VCP, FF_DDC_CI_LUMINANCE_OPCODE, 0 };
+                i2cIn[4] = FF_DDC_CI_WRITE_ADDR ^ i2cIn[0] ^ i2cIn[1] ^ i2cIn[2] ^ i2cIn[3];
+
+                IOI2CRequest request = {
+                    .commFlags = kNilOptions,
+                    .sendAddress = FF_DDC_CI_WRITE_ADDR,
+                    .sendTransactionType = kIOI2CSimpleTransactionType,
+                    .sendBuffer = (vm_address_t) i2cIn,
+                    .sendBytes = ARRAY_SIZE(i2cIn),
+                    .minReplyDelay = options->ddcciSleep * 1000ULL,
+                    .replyAddress = FF_DDC_CI_READ_ADDR,
+                    .replySubAddress = FF_DDC_CI_VCP_COMMAND,
+                    .replyTransactionType = transactionType,
+                    .replyBytes = ARRAY_SIZE(i2cOut),
+                    .replyBuffer = (vm_address_t) i2cOut,
+                };
+                IOReturn ret = IOI2CSendRequest(connect, kNilOptions, &request);
+                IOI2CInterfaceClose(connect, kNilOptions);
+
+                if (ret != KERN_SUCCESS || request.result != kIOReturnSuccess || request.replyBytes < 10) {
+                    continue;
+                }
+                if (i2cOut[2] != 0x02 || i2cOut[3] != 0x00) {
+                    continue;
+                }
+
+                uint32_t current = ((uint32_t) i2cOut[8] << 8u) + (uint32_t) i2cOut[9];
+                uint32_t max = ((uint32_t) i2cOut[6] << 8u) + (uint32_t) i2cOut[7];
+
+                FFBrightnessResult* brightness = FF_LIST_ADD(FFBrightnessResult, *result);
+                brightness->max = max;
+                brightness->min = 0;
+                brightness->current = current;
+                ffStrbufInitCopy(&brightness->name, &display->name);
+                brightness->builtin = false;
+
+                break;
+            }
+        }
+    }
+
+    return NULL;
+}
+#endif
+
+const char* ffDetectBrightness(FFBrightnessOptions* options, FFlist* result) {
+    const FFDisplayServerResult* displayServer = ffConnectDisplayServer();
+
+    detectWithDisplayServices(displayServer, result);
+
+    if (options->ddcciSleep != FF_BRIGHTNESS_DDCCI_SLEEP_SKIP && displayServer->displays.length > result->length) {
+        detectWithDdcci(displayServer, options, result);
+    }
+
+    return NULL;
+}