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      1 /* $NetBSD: sunxi_drm.h,v 1.3 2021/12/19 12:28:20 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2019 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _ARM_SUNXI_DRM_H
     30 #define _ARM_SUNXI_DRM_H
     31 
     32 #include <sys/queue.h>
     33 #include <sys/workqueue.h>
     34 
     35 #include <drm/drm_fb_helper.h>
     36 #include <drm/drm_gem_cma_helper.h>
     37 
     38 #define DRIVER_AUTHOR		"Jared McNeill"
     39 
     40 #define DRIVER_NAME		"sunxi"
     41 #define DRIVER_DESC		"Allwinner Display Engine"
     42 #define DRIVER_DATE		"20190123"
     43 
     44 #define DRIVER_MAJOR		1
     45 #define DRIVER_MINOR		0
     46 #define DRIVER_PATCHLEVEL	0
     47 
     48 struct sunxi_framebuffer;
     49 
     50 #define	SUNXI_DRM_MAX_CRTC	2
     51 
     52 struct sunxi_drm_vblank {
     53 	void			*priv;
     54 	void			(*enable_vblank)(void *);
     55 	void			(*disable_vblank)(void *);
     56 	uint32_t		(*get_vblank_counter)(void *);
     57 };
     58 
     59 struct sunxi_drm_softc {
     60 	device_t		sc_dev;
     61 	struct drm_device	*sc_ddev;
     62 
     63 	bus_space_tag_t		sc_bst;
     64 	bus_dma_tag_t		sc_dmat;
     65 
     66 	int			sc_phandle;
     67 
     68 	struct lwp			*sc_task_thread;
     69 	SIMPLEQ_HEAD(, sunxi_drm_task)	sc_tasks;
     70 	struct workqueue		*sc_task_wq;
     71 
     72 	bool			sc_dev_registered;
     73 
     74 	struct sunxi_drm_vblank	sc_vbl[SUNXI_DRM_MAX_CRTC];
     75 };
     76 
     77 struct sunxi_drm_framebuffer {
     78 	struct drm_framebuffer	base;
     79 	struct drm_gem_cma_object *obj;
     80 };
     81 
     82 struct sunxi_drm_endpoint {
     83 	int			phandle;
     84 	struct fdt_endpoint	*ep;
     85 	struct drm_device	*ddev;
     86 	TAILQ_ENTRY(sunxi_drm_endpoint) entries;
     87 };
     88 
     89 struct sunxi_drm_fbdev {
     90 	struct drm_fb_helper	helper;
     91 };
     92 
     93 struct sunxi_drmfb_attach_args {
     94 	struct drm_device	*sfa_drm_dev;
     95 	struct drm_fb_helper	*sfa_fb_helper;
     96 	struct drm_fb_helper_surface_size sfa_fb_sizes;
     97 	bus_space_tag_t		sfa_fb_bst;
     98 	bus_dma_tag_t		sfa_fb_dmat;
     99 	uint32_t		sfa_fb_linebytes;
    100 };
    101 
    102 struct sunxi_drm_task {
    103 	union {
    104 		SIMPLEQ_ENTRY(sunxi_drm_task)	queue;
    105 		struct work			work;
    106 	}		sdt_u;
    107 	void		(*sdt_fn)(struct sunxi_drm_task *);
    108 };
    109 
    110 #define sunxi_drm_private(ddev)		(ddev)->dev_private
    111 #define	to_sunxi_drm_framebuffer(x)	container_of(x, struct sunxi_drm_framebuffer, base)
    112 
    113 int	sunxi_drm_register_endpoint(int, struct fdt_endpoint *);
    114 struct drm_device *sunxi_drm_endpoint_device(struct fdt_endpoint *);
    115 
    116 void	sunxi_task_init(struct sunxi_drm_task *,
    117 	    void (*)(struct sunxi_drm_task *));
    118 void	sunxi_task_schedule(device_t, struct sunxi_drm_task *);
    119 
    120 #endif /* _ARM_SUNXI_DRM_H */
    121