/* $NetBSD: tegra_drm.c,v 1.16 2022/04/21 21:22:25 andvar Exp $ */ /*- * Copyright (c) 2015 Jared D. McNeill * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: tegra_drm.c,v 1.16 2022/04/21 21:22:25 andvar Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int tegra_drm_match(device_t, cfdata_t, void *); static void tegra_drm_attach(device_t, device_t, void *); static int tegra_drm_load(struct drm_device *, unsigned long); static void tegra_drm_unload(struct drm_device *); static void tegra_drm_task_work(struct work *, void *); static struct drm_driver tegra_drm_driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM, .dev_priv_size = 0, .load = tegra_drm_load, .unload = tegra_drm_unload, .gem_free_object = drm_gem_cma_free_object, .mmap_object = drm_gem_or_legacy_mmap_object, .gem_uvm_ops = &drm_gem_cma_uvm_ops, .dumb_create = drm_gem_cma_dumb_create, .get_vblank_counter = tegra_drm_get_vblank_counter, .enable_vblank = tegra_drm_enable_vblank, .disable_vblank = tegra_drm_disable_vblank, .name = DRIVER_NAME, .desc = DRIVER_DESC, .date = DRIVER_DATE, .major = DRIVER_MAJOR, .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, }; CFATTACH_DECL_NEW(tegra_drm, sizeof(struct tegra_drm_softc), tegra_drm_match, tegra_drm_attach, NULL, NULL); static const struct device_compatible_entry compat_data[] = { { .compat = "nvidia,tegra124-host1x" }, DEVICE_COMPAT_EOL }; static int tegra_drm_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_compatible_match(faa->faa_phandle, compat_data); } static const struct device_compatible_entry hdmi_compat[] = { { .compat = "nvidia,tegra124-hdmi" }, DEVICE_COMPAT_EOL }; static const struct device_compatible_entry dc_compat[] = { { .compat = "nvidia,tegra124-dc" }, DEVICE_COMPAT_EOL }; static void tegra_drm_attach(device_t parent, device_t self, void *aux) { struct tegra_drm_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; struct drm_driver * const driver = &tegra_drm_driver; prop_dictionary_t prop = device_properties(self); int error, node, hdmi_phandle, ddc_phandle; static const char * const hdmi_supplies[] = { "hdmi-supply", "pll-supply", "vdd-supply" }; struct fdtbus_regulator *reg; u_int n, ndc; sc->sc_dev = self; sc->sc_dmat = faa->faa_dmat; sc->sc_bst = faa->faa_bst; sc->sc_phandle = faa->faa_phandle; sc->sc_task_thread = NULL; SIMPLEQ_INIT(&sc->sc_tasks); if (workqueue_create(&sc->sc_task_wq, "tegradrm", &tegra_drm_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE)) { aprint_error_dev(self, "unable to create workqueue\n"); sc->sc_task_wq = NULL; return; } aprint_naive("\n"); aprint_normal("\n"); sc->sc_clk_host1x = fdtbus_clock_get_index(faa->faa_phandle, 0); if (sc->sc_clk_host1x == NULL) { aprint_error_dev(self, "couldn't get clock host1x\n"); return; } sc->sc_rst_host1x = fdtbus_reset_get(faa->faa_phandle, "host1x"); if (sc->sc_clk_host1x == NULL || sc->sc_rst_host1x == NULL) { aprint_error_dev(self, "couldn't get reset host1x\n"); return; } ndc = 0; hdmi_phandle = -1; for (node = OF_child(faa->faa_phandle); node; node = OF_peer(node)) { if (of_compatible_match(node, hdmi_compat)) { sc->sc_clk_hdmi = fdtbus_clock_get(node, "hdmi"); sc->sc_clk_hdmi_parent = fdtbus_clock_get(node, "parent"); sc->sc_rst_hdmi = fdtbus_reset_get(node, "hdmi"); hdmi_phandle = node; } else if (of_compatible_match(node, dc_compat) && ndc < __arraycount(sc->sc_clk_dc)) { sc->sc_clk_dc[ndc] = fdtbus_clock_get(node, "dc"); sc->sc_clk_dc_parent[ndc] = fdtbus_clock_get(node, "parent"); sc->sc_rst_dc[ndc] = fdtbus_reset_get(node, "dc"); ++ndc; } } if (hdmi_phandle >= 0) { ddc_phandle = fdtbus_get_phandle(hdmi_phandle, "nvidia,ddc-i2c-bus"); if (ddc_phandle >= 0) { sc->sc_ddc = fdtbus_i2c_get_tag(ddc_phandle); } sc->sc_pin_hpd = fdtbus_gpio_acquire(hdmi_phandle, "nvidia,hpd-gpio", GPIO_PIN_INPUT); for (n = 0; n < __arraycount(hdmi_supplies); n++) { const char *supply = hdmi_supplies[n]; reg = fdtbus_regulator_acquire(hdmi_phandle, supply); if (reg == NULL) { aprint_error_dev(self, "couldn't acquire %s\n", supply); continue; } if (fdtbus_regulator_enable(reg) != 0) { aprint_error_dev(self, "couldn't enable %s\n", supply); } fdtbus_regulator_release(reg); } } fdtbus_reset_assert(sc->sc_rst_host1x); error = clk_enable(sc->sc_clk_host1x); if (error) { aprint_error_dev(self, "couldn't enable clock host1x: %d\n", error); return; } fdtbus_reset_deassert(sc->sc_rst_host1x); prop_dictionary_get_bool(prop, "force-dvi", &sc->sc_force_dvi); sc->sc_ddev = drm_dev_alloc(driver, sc->sc_dev); if (IS_ERR(sc->sc_ddev)) { aprint_error_dev(self, "couldn't allocate DRM device\n"); return; } sc->sc_ddev->dev_private = sc; sc->sc_ddev->bst = sc->sc_bst; sc->sc_ddev->bus_dmat = sc->sc_dmat; sc->sc_ddev->dmat = sc->sc_ddev->bus_dmat; sc->sc_ddev->dmat_subregion_p = false; /* * Cause any tasks issued synchronously during attach to be * processed at the end of this function. */ sc->sc_task_thread = curlwp; error = -drm_dev_register(sc->sc_ddev, 0); if (error) { drm_dev_put(sc->sc_ddev); sc->sc_ddev = NULL; aprint_error_dev(self, "couldn't register DRM device: %d\n", error); goto out; } sc->sc_dev_registered = true; aprint_normal_dev(self, "initialized %s %d.%d.%d %s on minor %d\n", driver->name, driver->major, driver->minor, driver->patchlevel, driver->date, sc->sc_ddev->primary->index); /* * Process asynchronous tasks queued synchronously during * attach. This will be for display detection to attach a * framebuffer, so we have the opportunity for a console device * to attach before autoconf has completed, in time for init(8) * to find that console without panicking. */ while (!SIMPLEQ_EMPTY(&sc->sc_tasks)) { struct tegra_drm_task *const task = SIMPLEQ_FIRST(&sc->sc_tasks); SIMPLEQ_REMOVE_HEAD(&sc->sc_tasks, tdt_u.queue); (*task->tdt_fn)(task); } out: /* Cause any subsequent tasks to be processed by the workqueue. */ atomic_store_relaxed(&sc->sc_task_thread, NULL); } static int tegra_drm_load(struct drm_device *ddev, unsigned long flags) { int error; error = tegra_drm_mode_init(ddev); if (error) goto drmerr; error = tegra_drm_fb_init(ddev); if (error) goto drmerr; return 0; drmerr: drm_mode_config_cleanup(ddev); return error; } static void tegra_drm_unload(struct drm_device *ddev) { drm_mode_config_cleanup(ddev); } static void tegra_drm_task_work(struct work *work, void *cookie) { struct tegra_drm_task *task = container_of(work, struct tegra_drm_task, tdt_u.work); (*task->tdt_fn)(task); } void tegra_task_init(struct tegra_drm_task *task, void (*fn)(struct tegra_drm_task *)) { task->tdt_fn = fn; } void tegra_task_schedule(device_t self, struct tegra_drm_task *task) { struct tegra_drm_softc *sc = device_private(self); if (atomic_load_relaxed(&sc->sc_task_thread) == curlwp) SIMPLEQ_INSERT_TAIL(&sc->sc_tasks, task, tdt_u.queue); else workqueue_enqueue(sc->sc_task_wq, &task->tdt_u.work, NULL); }