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      1 /* $NetBSD: rk_drm.h,v 1.2 2021/12/19 12:28:27 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_RK_DRM_H
     30 #define _ARM_RK_DRM_H
     31 
     32 #include <sys/workqueue.h>
     33 #include <drm/drm_fb_helper.h>
     34 #include <drm/drm_gem_cma_helper.h>
     35 
     36 #define DRIVER_AUTHOR		"Jared McNeill"
     37 
     38 #define DRIVER_NAME		"rk"
     39 #define DRIVER_DESC		"Rockchip Display Subsystem"
     40 #define DRIVER_DATE		"20191109"
     41 
     42 #define DRIVER_MAJOR		1
     43 #define DRIVER_MINOR		0
     44 #define DRIVER_PATCHLEVEL	0
     45 
     46 struct rk_framebuffer;
     47 
     48 #define	RK_DRM_MAX_CRTC	2
     49 
     50 struct rk_drm_vblank {
     51 	void			*priv;
     52 	void			(*enable_vblank)(void *);
     53 	void			(*disable_vblank)(void *);
     54 	uint32_t		(*get_vblank_counter)(void *);
     55 };
     56 
     57 struct rk_drm_softc {
     58 	device_t		sc_dev;
     59 	struct drm_device	*sc_ddev;
     60 
     61 	bus_space_tag_t		sc_bst;
     62 	bus_dma_tag_t		sc_dmat;
     63 
     64 	int			sc_phandle;
     65 
     66 	struct lwp			*sc_task_thread;
     67 	SIMPLEQ_HEAD(, rk_drm_task)	sc_tasks;
     68 	struct workqueue		*sc_task_wq;
     69 
     70 	bool			sc_dev_registered;
     71 
     72 	struct rk_drm_vblank	sc_vbl[RK_DRM_MAX_CRTC];
     73 };
     74 
     75 struct rk_drm_framebuffer {
     76 	struct drm_framebuffer	base;
     77 	struct drm_gem_cma_object *obj;
     78 };
     79 
     80 struct rk_drm_ports {
     81 	int			phandle;
     82 	struct fdt_device_ports	*port;
     83 	struct drm_device	*ddev;
     84 	TAILQ_ENTRY(rk_drm_ports) entries;
     85 };
     86 
     87 struct rk_drm_fbdev {
     88 	struct drm_fb_helper	helper;
     89 };
     90 
     91 struct rk_drmfb_attach_args {
     92 	struct drm_device	*sfa_drm_dev;
     93 	struct drm_fb_helper	*sfa_fb_helper;
     94 	struct drm_fb_helper_surface_size sfa_fb_sizes;
     95 	bus_space_tag_t		sfa_fb_bst;
     96 	bus_dma_tag_t		sfa_fb_dmat;
     97 	uint32_t		sfa_fb_linebytes;
     98 };
     99 
    100 struct rk_drm_task {
    101 	union {
    102 		SIMPLEQ_ENTRY(rk_drm_task)	queue;
    103 		struct work			work;
    104 	}		rdt_u;
    105 	void		(*rdt_fn)(struct rk_drm_task *);
    106 };
    107 
    108 #define rk_drm_private(ddev)		(ddev)->dev_private
    109 #define	to_rk_drm_framebuffer(x)	container_of(x, struct rk_drm_framebuffer, base)
    110 
    111 int	rk_drm_register_port(int, struct fdt_device_ports *);
    112 struct drm_device *rk_drm_port_device(struct fdt_device_ports *);
    113 
    114 void	rk_task_init(struct rk_drm_task *,
    115 	    void (*)(struct rk_drm_task *));
    116 void	rk_task_schedule(device_t, struct rk_drm_task *);
    117 
    118 #endif /* _ARM_RK_DRM_H */
    119