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Add an ioctl interface for setting video mode

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This commit is contained in:
Kevin Lange 2017-02-18 22:19:35 +09:00
parent 0a7b779340
commit dca9c2b9d3
2 changed files with 12 additions and 0 deletions
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1
kernel/include/video.h
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@ -5,6 +5,7 @@
#define IO_VID_DEPTH 0x5003 #define IO_VID_DEPTH 0x5003
#define IO_VID_ADDR 0x5004 #define IO_VID_ADDR 0x5004
#define IO_VID_SIGNAL 0x5005 #define IO_VID_SIGNAL 0x5005
#define IO_VID_SET 0x5006
#ifdef _KERNEL_ #ifdef _KERNEL_
extern void lfb_set_resolution(uint16_t x, uint16_t y); extern void lfb_set_resolution(uint16_t x, uint16_t y);

11
modules/lfbvideo.c
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@ -36,6 +36,8 @@ static uint16_t bochs_current_scroll(void);
static pid_t display_change_recipient = 0; static pid_t display_change_recipient = 0;
void lfb_set_resolution(uint16_t x, uint16_t y);
/* /*
* Address of the linear frame buffer. * Address of the linear frame buffer.
* This can move, so it's a pointer instead of * This can move, so it's a pointer instead of
@ -43,6 +45,11 @@ static pid_t display_change_recipient = 0;
*/ */
uint8_t * lfb_vid_memory = (uint8_t *)0xE0000000; uint8_t * lfb_vid_memory = (uint8_t *)0xE0000000;
struct vid_size {
uint32_t width;
uint32_t height;
};
static int ioctl_vid(fs_node_t * node, int request, void * argp) { static int ioctl_vid(fs_node_t * node, int request, void * argp) {
/* TODO: Make this actually support multiple video devices */ /* TODO: Make this actually support multiple video devices */
@ -67,6 +74,10 @@ static int ioctl_vid(fs_node_t * node, int request, void * argp) {
/* ioctl to register for a signal (vid device change? idk) on display change */ /* ioctl to register for a signal (vid device change? idk) on display change */
display_change_recipient = getpid(); display_change_recipient = getpid();
return 0; return 0;
case IO_VID_SET:
validate(argp);
lfb_set_resolution(((struct vid_size *)argp)->width, ((struct vid_size *)argp)->height);
return 0;
default: default:
return -1; /* TODO EINV... something or other */ return -1; /* TODO EINV... something or other */
} }