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      1  1.6  riastrad /* $NetBSD: tegra_fb.c,v 1.6 2021/12/19 12:44:50 riastradh Exp $ */
      2  1.1  jmcneill 
      3  1.1  jmcneill /*-
      4  1.1  jmcneill  * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  1.1  jmcneill  * All rights reserved.
      6  1.1  jmcneill  *
      7  1.1  jmcneill  * Redistribution and use in source and binary forms, with or without
      8  1.1  jmcneill  * modification, are permitted provided that the following conditions
      9  1.1  jmcneill  * are met:
     10  1.1  jmcneill  * 1. Redistributions of source code must retain the above copyright
     11  1.1  jmcneill  *    notice, this list of conditions and the following disclaimer.
     12  1.1  jmcneill  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1  jmcneill  *    notice, this list of conditions and the following disclaimer in the
     14  1.1  jmcneill  *    documentation and/or other materials provided with the distribution.
     15  1.1  jmcneill  *
     16  1.1  jmcneill  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.1  jmcneill  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.1  jmcneill  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.1  jmcneill  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.1  jmcneill  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  1.1  jmcneill  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  1.1  jmcneill  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  1.1  jmcneill  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  1.1  jmcneill  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1  jmcneill  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1  jmcneill  * SUCH DAMAGE.
     27  1.1  jmcneill  */
     28  1.1  jmcneill 
     29  1.1  jmcneill #include <sys/cdefs.h>
     30  1.6  riastrad __KERNEL_RCSID(0, "$NetBSD: tegra_fb.c,v 1.6 2021/12/19 12:44:50 riastradh Exp $");
     31  1.1  jmcneill 
     32  1.1  jmcneill #include <sys/param.h>
     33  1.1  jmcneill #include <sys/bus.h>
     34  1.1  jmcneill #include <sys/device.h>
     35  1.1  jmcneill 
     36  1.5  riastrad #include <drm/drm_drv.h>
     37  1.1  jmcneill #include <drm/drmfb.h>
     38  1.1  jmcneill 
     39  1.1  jmcneill #include <arm/nvidia/tegra_var.h>
     40  1.1  jmcneill #include <arm/nvidia/tegra_drm.h>
     41  1.1  jmcneill 
     42  1.1  jmcneill static int	tegra_fb_match(device_t, cfdata_t, void *);
     43  1.1  jmcneill static void	tegra_fb_attach(device_t, device_t, void *);
     44  1.1  jmcneill 
     45  1.6  riastrad static void	tegra_fb_init(struct tegra_drm_task *);
     46  1.6  riastrad 
     47  1.1  jmcneill static bool	tegra_fb_shutdown(device_t, int);
     48  1.1  jmcneill 
     49  1.1  jmcneill struct tegra_fb_softc {
     50  1.1  jmcneill 	struct drmfb_softc	sc_drmfb;
     51  1.1  jmcneill 	device_t		sc_dev;
     52  1.1  jmcneill 	struct tegra_drm_softc	*sc_drm;
     53  1.1  jmcneill 	struct tegra_drmfb_attach_args sc_tfa;
     54  1.2  jmcneill 	struct tegra_framebuffer *sc_fb;
     55  1.6  riastrad 	struct tegra_drm_task	sc_attach_task;
     56  1.1  jmcneill };
     57  1.1  jmcneill 
     58  1.1  jmcneill static paddr_t	tegra_fb_mmapfb(struct drmfb_softc *, off_t, int);
     59  1.1  jmcneill static int	tegra_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
     60  1.1  jmcneill 			       lwp_t *);
     61  1.1  jmcneill 
     62  1.1  jmcneill 
     63  1.1  jmcneill static const struct drmfb_params tegrafb_drmfb_params = {
     64  1.1  jmcneill 	.dp_mmapfb = tegra_fb_mmapfb,
     65  1.1  jmcneill 	.dp_ioctl = tegra_fb_ioctl,
     66  1.1  jmcneill };
     67  1.1  jmcneill 
     68  1.1  jmcneill CFATTACH_DECL_NEW(tegra_fb, sizeof(struct tegra_fb_softc),
     69  1.1  jmcneill 	tegra_fb_match, tegra_fb_attach, NULL, NULL);
     70  1.1  jmcneill 
     71  1.1  jmcneill static int
     72  1.1  jmcneill tegra_fb_match(device_t parent, cfdata_t cf, void *aux)
     73  1.1  jmcneill {
     74  1.1  jmcneill 	return 1;
     75  1.1  jmcneill }
     76  1.1  jmcneill 
     77  1.1  jmcneill static void
     78  1.1  jmcneill tegra_fb_attach(device_t parent, device_t self, void *aux)
     79  1.1  jmcneill {
     80  1.1  jmcneill 	struct tegra_fb_softc * const sc = device_private(self);
     81  1.1  jmcneill 	struct tegra_drm_softc * const drmsc = device_private(parent);
     82  1.1  jmcneill 	struct tegra_drmfb_attach_args * const tfa = aux;
     83  1.1  jmcneill 
     84  1.1  jmcneill 	sc->sc_dev = self;
     85  1.1  jmcneill 	sc->sc_drm = drmsc;
     86  1.1  jmcneill 	sc->sc_tfa = *tfa;
     87  1.2  jmcneill 	sc->sc_fb = to_tegra_framebuffer(tfa->tfa_fb_helper->fb);
     88  1.1  jmcneill 
     89  1.1  jmcneill 	aprint_naive("\n");
     90  1.1  jmcneill 	aprint_normal("\n");
     91  1.1  jmcneill 
     92  1.6  riastrad 	tegra_task_init(&sc->sc_attach_task, &tegra_fb_init);
     93  1.6  riastrad 	tegra_task_schedule(parent, &sc->sc_attach_task);
     94  1.6  riastrad }
     95  1.6  riastrad 
     96  1.6  riastrad static void
     97  1.6  riastrad tegra_fb_init(struct tegra_drm_task *task)
     98  1.6  riastrad {
     99  1.6  riastrad 	struct tegra_fb_softc *sc = container_of(task, struct tegra_fb_softc,
    100  1.6  riastrad 	    sc_attach_task);
    101  1.6  riastrad 	device_t self = sc->sc_dev;
    102  1.6  riastrad 	struct tegra_drmfb_attach_args * const tfa = &sc->sc_tfa;
    103  1.3      maya 	const struct drmfb_attach_args da = {
    104  1.3      maya 		.da_dev = self,
    105  1.3      maya 		.da_fb_helper = tfa->tfa_fb_helper,
    106  1.3      maya 		.da_fb_sizes = &tfa->tfa_fb_sizes,
    107  1.4  jmcneill 		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
    108  1.3      maya 		.da_fb_linebytes = tfa->tfa_fb_linebytes,
    109  1.3      maya 		.da_params = &tegrafb_drmfb_params,
    110  1.3      maya 	};
    111  1.6  riastrad 	int error;
    112  1.1  jmcneill 
    113  1.1  jmcneill 	error = drmfb_attach(&sc->sc_drmfb, &da);
    114  1.1  jmcneill 	if (error) {
    115  1.1  jmcneill 		aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
    116  1.1  jmcneill 		return;
    117  1.1  jmcneill 	}
    118  1.1  jmcneill 
    119  1.1  jmcneill 	pmf_device_register1(self, NULL, NULL, tegra_fb_shutdown);
    120  1.1  jmcneill }
    121  1.1  jmcneill 
    122  1.1  jmcneill static bool
    123  1.1  jmcneill tegra_fb_shutdown(device_t self, int flags)
    124  1.1  jmcneill {
    125  1.1  jmcneill 	struct tegra_fb_softc * const sc = device_private(self);
    126  1.1  jmcneill 
    127  1.1  jmcneill 	return drmfb_shutdown(&sc->sc_drmfb, flags);
    128  1.1  jmcneill }
    129  1.1  jmcneill 
    130  1.1  jmcneill static paddr_t
    131  1.1  jmcneill tegra_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
    132  1.1  jmcneill {
    133  1.1  jmcneill 	struct tegra_fb_softc * const tfb_sc = (struct tegra_fb_softc *)sc;
    134  1.4  jmcneill 	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
    135  1.1  jmcneill 
    136  1.1  jmcneill 	KASSERT(off >= 0);
    137  1.2  jmcneill 	KASSERT(off < obj->dmasize);
    138  1.1  jmcneill 
    139  1.2  jmcneill 	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
    140  1.2  jmcneill 	    BUS_DMA_PREFETCHABLE);
    141  1.1  jmcneill }
    142  1.1  jmcneill 
    143  1.1  jmcneill static int
    144  1.1  jmcneill tegra_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
    145  1.1  jmcneill     lwp_t *l)
    146  1.1  jmcneill {
    147  1.1  jmcneill 	struct wsdisplayio_bus_id *busid;
    148  1.1  jmcneill 	struct wsdisplayio_fbinfo *fbi;
    149  1.1  jmcneill 	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
    150  1.1  jmcneill 	int error;
    151  1.1  jmcneill 
    152  1.1  jmcneill 	switch (cmd) {
    153  1.1  jmcneill 	case WSDISPLAYIO_GET_BUSID:
    154  1.1  jmcneill 		busid = data;
    155  1.1  jmcneill 		busid->bus_type = WSDISPLAYIO_BUS_SOC;
    156  1.1  jmcneill 		return 0;
    157  1.1  jmcneill 	case WSDISPLAYIO_GTYPE:
    158  1.1  jmcneill 		*(u_int *)data = WSDISPLAY_TYPE_TEGRA;
    159  1.1  jmcneill 		return 0;
    160  1.1  jmcneill 	case WSDISPLAYIO_GET_FBINFO:
    161  1.1  jmcneill 		fbi = data;
    162  1.1  jmcneill 		error = wsdisplayio_get_fbinfo(ri, fbi);
    163  1.1  jmcneill 		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
    164  1.1  jmcneill 		return error;
    165  1.1  jmcneill 	default:
    166  1.1  jmcneill 		return EPASSTHROUGH;
    167  1.1  jmcneill 	}
    168  1.1  jmcneill }
    169