/* $NetBSD: tegra_drm.c,v 1.10 2018/08/27 15:31:51 riastradh 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 1.10 2018/08/27 15:31:51 riastradh Exp $"); #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_set_busid(struct drm_device *, struct drm_master *); static int tegra_drm_load(struct drm_device *, unsigned long); static int tegra_drm_unload(struct drm_device *); 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, .dumb_map_offset = drm_gem_cma_dumb_map_offset, .dumb_destroy = drm_gem_dumb_destroy, .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, .set_busid = tegra_drm_set_busid, }; CFATTACH_DECL_NEW(tegra_drm, sizeof(struct tegra_drm_softc), tegra_drm_match, tegra_drm_attach, NULL, NULL); static int tegra_drm_match(device_t parent, cfdata_t cf, void *aux) { const char * compatible[] = { "nvidia,tegra124-host1x", NULL }; struct fdt_attach_args * const faa = aux; return of_match_compatible(faa->faa_phandle, compatible); } 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; const char * const hdmi_compat[] = { "nvidia,tegra124-hdmi", NULL }; const char * const dc_compat[] = { "nvidia,tegra124-dc", NULL }; 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; 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_match_compatible(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_match_compatible(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_get_i2c_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 (sc->sc_ddev == NULL) { 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; error = -drm_dev_register(sc->sc_ddev, 0); if (error) { drm_dev_unref(sc->sc_ddev); aprint_error_dev(self, "couldn't register DRM device: %d\n", error); return; } 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); return; } static int tegra_drm_set_busid(struct drm_device *ddev, struct drm_master *master) { const char *id = "platform:tegra:0"; master->unique = kzalloc(strlen(id) + 1, GFP_KERNEL); if (master->unique == NULL) return -ENOMEM; strcpy(master->unique, id); master->unique_len = strlen(master->unique); return 0; } 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 int tegra_drm_unload(struct drm_device *ddev) { drm_mode_config_cleanup(ddev); return 0; }