diff options
Diffstat (limited to 'input-switch.c')
| -rw-r--r-- | input-switch.c | 129 |
1 files changed, 93 insertions, 36 deletions
diff --git a/input-switch.c b/input-switch.c index abf81d9..5788f4a 100644 --- a/input-switch.c +++ b/input-switch.c @@ -1,7 +1,7 @@ /* * input-switch.c: switches display input via DDC/CI * - * Copyright (c) 2017, Přemysl Eric Janouch <p@janouch.name> + * Copyright (c) 2017 - 2022, Přemysl Eric Janouch <p@janouch.name> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted. @@ -28,8 +28,59 @@ #include "ddc-ci.c" #include <dirent.h> +// This list is from the MCCS 2.2a specification +struct +{ + int code; ///< Input code + const char *name; ///< Input name + int index; ///< Input index +} +g_inputs[] = +{ + { 0x01, "VGA", 1, }, // Analog video (R/G/B) 1 + { 0x02, "VGA", 2, }, // Analog video (R/G/B) 2 + { 0x03, "DVI", 1, }, // Digital video (TMDS) 1 DVI 1 + { 0x04, "DVI", 2, }, // Digital video (TMDS) 2 DVI 2 + { 0x05, "composite", 1, }, // Composite video 1 + { 0x06, "composite", 2, }, // Composite video 2 + { 0x07, "S-Video", 1, }, // S-video 1 + { 0x08, "S-Video", 2, }, // S-video 2 + { 0x09, "tuner", 1, }, // Tuner 1 + { 0x0A, "tuner", 2, }, // Tuner 2 + { 0x0B, "tuner", 3, }, // Tuner 3 + { 0x0C, "component", 1, }, // Component video (YPbPr/YCbCr) 1 + { 0x0D, "component", 2, }, // Component video (YPbPr/YCbCr) 2 + { 0x0E, "component", 3, }, // Component video (YPbPr/YCbCr) 3 + { 0x0F, "DP", 1, }, // DisplayPort 1 + { 0x10, "DP", 2, }, // DisplayPort 2 + { 0x11, "HDMI", 1, }, // Digital Video (TMDS) 3 HDMI 1 + { 0x12, "HDMI", 2, }, // Digital Video (TMDS) 4 HDMI 2 + { 0x15, "bnq-tb", 1, }, // Thunderbolt on BenQ PD3220U (no spec) +}; + // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +typedef bool (*ActionFunc) (int fd, int param, struct error **); + +static bool +get_input_source (int fd, int input, struct error **e) +{ + struct vcp_feature_readout readout = {}; + if (!vcp_get_feature (fd, VCP_INPUT_SOURCE, &readout, e)) + return false; + + (void) input; + for (size_t i = 0; i < N_ELEMENTS (g_inputs); i++) + if (g_inputs[i].code == readout.cur) + { + printf ("input is %s %d\n", g_inputs[i].name, g_inputs[i].index); + return true; + } + + printf ("input is %d\n", readout.cur); + return true; +} + static bool set_input_source (int fd, int input, struct error **e) { @@ -49,8 +100,31 @@ set_input_source (int fd, int input, struct error **e) return true; } + +static bool +set_bnq_kvm (int fd, int kvm, struct error **e) +{ + // This function does a leap of faith, should check the actual manufacturer + enum { VCP_BNQ_KVM = 0xE4 }; + + struct vcp_feature_readout readout = {}; + if (!vcp_get_feature (fd, VCP_BNQ_KVM, &readout, e)) + return false; + if (kvm < 0 || kvm > readout.max) + return error_set (e, "KVM index out of range"); + + uint8_t set_req[] = { VCP_BNQ_KVM, kvm >> 8, kvm }; + if (!ddc_send (fd, DDC_SET_VCP_FEATURE, set_req, sizeof set_req, e)) + return false; + + wait_ms (50); + + printf ("KVM set from %d to %d of %d\n", readout.cur, kvm, readout.max); + return true; +} + static void -i2c (int input) +i2c (ActionFunc action, int param) { DIR *dev = opendir ("/dev"); if (!dev) @@ -76,7 +150,7 @@ i2c (int input) struct error *e = NULL; if (!is_a_display (fd, &e) - || !set_input_source (fd, input, &e)) + || !action (fd, param, &e)) { printf ("%s\n", e->message); error_free (e); @@ -89,35 +163,6 @@ i2c (int input) // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// This list is from the MCCS 2.2a specification -struct -{ - int code; ///< Input code - const char *name; ///< Input name - int index; ///< Input index -} -g_inputs[] = -{ - { 0x01, "vga", 1, }, // Analog video (R/G/B) 1 - { 0x02, "vga", 2, }, // Analog video (R/G/B) 2 - { 0x03, "dvi", 1, }, // Digital video (TMDS) 1 DVI 1 - { 0x04, "dvi", 2, }, // Digital video (TMDS) 2 DVI 2 - { 0x05, "composite", 1, }, // Composite video 1 - { 0x06, "composite", 2, }, // Composite video 2 - { 0x07, "s-video", 1, }, // S-video 1 - { 0x08, "s-video", 2, }, // S-video 2 - { 0x09, "tuner", 1, }, // Tuner 1 - { 0x0A, "tuner", 2, }, // Tuner 2 - { 0x0B, "tuner", 3, }, // Tuner 3 - { 0x0C, "component", 1, }, // Component video (YPbPr/YCbCr) 1 - { 0x0D, "component", 2, }, // Component video (YPbPr/YCbCr) 2 - { 0x0E, "component", 3, }, // Component video (YPbPr/YCbCr) 3 - { 0x0F, "dp", 1, }, // DisplayPort 1 - { 0x10, "dp", 2, }, // DisplayPort 2 - { 0x11, "hdmi", 1, }, // Digital Video (TMDS) 3 HDMI 1 - { 0x12, "hdmi", 2, }, // Digital Video (TMDS) 4 HDMI 2 -}; - int main (int argc, char *argv[]) { @@ -125,20 +170,33 @@ main (int argc, char *argv[]) if (argc <= 1) { - printf ("Usage: %s <input> [<index>]\n", argv[0]); + printf ("Usage: %s {? | INPUT [INDEX]}\n", argv[0]); exit (EXIT_FAILURE); } + if (!strcmp (argv[1], "?")) + { + i2c (get_input_source, -1); + exit (EXIT_SUCCESS); + } unsigned long input_source = 0; if (xstrtoul (&input_source, argv[1], 10)) { - i2c (input_source); + i2c (set_input_source, input_source); exit (EXIT_SUCCESS); } unsigned long index = 1; if (argc > 2 && !xstrtoul (&index, argv[2], 10)) exit_fatal ("given index is not a number: %s", argv[2]); + + // Manufacturer-specific, argument currently necessary, but we could rotate + if (argc > 2 && !strcasecmp (argv[1], "bnq-kvm")) + { + i2c (set_bnq_kvm, index); + exit (EXIT_SUCCESS); + } + for (size_t i = 0; i < N_ELEMENTS (g_inputs); i++) if (!strcasecmp_ascii (g_inputs[i].name, argv[1]) && g_inputs[i].index == (int) index) @@ -146,7 +204,6 @@ main (int argc, char *argv[]) if (!input_source) exit_fatal ("unknown input source: %s %lu", argv[1], index); - i2c (input_source); + i2c (set_input_source, input_source); return 0; } - |