diff options
| -rw-r--r-- | uart-render-controller.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/uart-render-controller.c b/uart-render-controller.c index dde6e63..f784933 100644 --- a/uart-render-controller.c +++ b/uart-render-controller.c @@ -72,6 +72,7 @@ enum host_state { struct render_ctx { enum host_state state; int vga_pw_fd; + int video_mode_fd; sd_bus *bus; const char *service_name; @@ -94,6 +95,7 @@ static const char *systemd_iface = "org.freedesktop.systemd1.Manager"; static void set_renderer_running(struct render_ctx *ctx, bool running) { + char buf[] = { '0', '\n' }; sd_bus_error e = {0}; int rc; @@ -111,12 +113,28 @@ static void set_renderer_running(struct render_ctx *ctx, bool running) ctx->service_name, "replace"); - if (rc < 0) + if (rc < 0) { warnx("failed to %s %s: %s\n", running ? "start" : "stop", ctx->service_name, sd_bus_error_is_set(&e) ? e.name : strerror(rc)); + return; + } + + /* 1 for local output, 0 for host */ + if (running) + buf[0] = '1'; + + rc = lseek(ctx->video_mode_fd, 0, SEEK_SET); + if (rc == -1) { + warn("Can't seek video mode reg interface"); + return; + } + + rc = write(ctx->video_mode_fd, buf, sizeof(buf)); + if (rc < 0) + warn("Can't write video mode reg interface"); } static int read_vga_pw_reg(struct render_ctx *ctx, uint8_t *regp) @@ -376,33 +394,38 @@ static int query_initial_state(struct render_ctx *ctx) static void usage(const char *progname) { - fprintf(stderr, "usage: %s <VGA-reg> <renderer-service>\n", + fprintf(stderr, "usage: %s <VGA-reg> <SCU-reg> <renderer-service>\n", progname); } int main(int argc, char **argv) { + const char *vga_pw_path, *video_mode_path; struct render_ctx _ctx, *ctx; - const char *vga_pw_path; char *match; int rc; ctx = &_ctx; - if (argc != 3) { + if (argc != 4) { usage(argv[0]); return EXIT_FAILURE; } vga_pw_path = argv[1]; - ctx->service_name = argv[2]; + video_mode_path = argv[2]; + ctx->service_name = argv[3]; ctx->vga_pw_fd = open(vga_pw_path, O_RDONLY); if (ctx->vga_pw_fd < 0) err(EXIT_FAILURE, "can't open VGA scratch regs interface at %s", vga_pw_path); + ctx->video_mode_fd = open(video_mode_path, O_WRONLY); + if (ctx->video_mode_fd < 0) + err(EXIT_FAILURE, "can't open video mode reg interface at %s", + video_mode_path); rc = sd_bus_default(&ctx->bus); if (rc < 0) |
