2 * Copyright (C) 2015 Free Electrons
3 * Copyright (C) 2015 NextThing Co
5 * Maxime Ripard <maxime.ripard@free-electrons.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
14 #include <drm/drm_atomic_helper.h>
15 #include <drm/drm_crtc.h>
16 #include <drm/drm_crtc_helper.h>
17 #include <drm/drm_modes.h>
19 #include <linux/clk-provider.h>
20 #include <linux/ioport.h>
21 #include <linux/of_address.h>
22 #include <linux/of_irq.h>
23 #include <linux/regmap.h>
25 #include <video/videomode.h>
27 #include "sun4i_backend.h"
28 #include "sun4i_crtc.h"
29 #include "sun4i_drv.h"
30 #include "sun4i_tcon.h"
32 static void sun4i_crtc_atomic_begin(struct drm_crtc
*crtc
,
33 struct drm_crtc_state
*old_state
)
35 struct sun4i_crtc
*scrtc
= drm_crtc_to_sun4i_crtc(crtc
);
36 struct drm_device
*dev
= crtc
->dev
;
39 if (crtc
->state
->event
) {
40 WARN_ON(drm_crtc_vblank_get(crtc
) != 0);
42 spin_lock_irqsave(&dev
->event_lock
, flags
);
43 scrtc
->event
= crtc
->state
->event
;
44 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
45 crtc
->state
->event
= NULL
;
49 static void sun4i_crtc_atomic_flush(struct drm_crtc
*crtc
,
50 struct drm_crtc_state
*old_state
)
52 struct sun4i_crtc
*scrtc
= drm_crtc_to_sun4i_crtc(crtc
);
53 struct sun4i_drv
*drv
= scrtc
->drv
;
55 DRM_DEBUG_DRIVER("Committing plane changes\n");
57 sun4i_backend_commit(drv
->backend
);
60 static void sun4i_crtc_disable(struct drm_crtc
*crtc
)
62 struct sun4i_crtc
*scrtc
= drm_crtc_to_sun4i_crtc(crtc
);
63 struct sun4i_drv
*drv
= scrtc
->drv
;
65 DRM_DEBUG_DRIVER("Disabling the CRTC\n");
67 sun4i_tcon_disable(drv
->tcon
);
69 if (crtc
->state
->event
&& !crtc
->state
->active
) {
70 spin_lock_irq(&crtc
->dev
->event_lock
);
71 drm_crtc_send_vblank_event(crtc
, crtc
->state
->event
);
72 spin_unlock_irq(&crtc
->dev
->event_lock
);
74 crtc
->state
->event
= NULL
;
78 static void sun4i_crtc_enable(struct drm_crtc
*crtc
)
80 struct sun4i_crtc
*scrtc
= drm_crtc_to_sun4i_crtc(crtc
);
81 struct sun4i_drv
*drv
= scrtc
->drv
;
83 DRM_DEBUG_DRIVER("Enabling the CRTC\n");
85 sun4i_tcon_enable(drv
->tcon
);
88 static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs
= {
89 .atomic_begin
= sun4i_crtc_atomic_begin
,
90 .atomic_flush
= sun4i_crtc_atomic_flush
,
91 .disable
= sun4i_crtc_disable
,
92 .enable
= sun4i_crtc_enable
,
95 static const struct drm_crtc_funcs sun4i_crtc_funcs
= {
96 .atomic_destroy_state
= drm_atomic_helper_crtc_destroy_state
,
97 .atomic_duplicate_state
= drm_atomic_helper_crtc_duplicate_state
,
98 .destroy
= drm_crtc_cleanup
,
99 .page_flip
= drm_atomic_helper_page_flip
,
100 .reset
= drm_atomic_helper_crtc_reset
,
101 .set_config
= drm_atomic_helper_set_config
,
104 struct sun4i_crtc
*sun4i_crtc_init(struct drm_device
*drm
)
106 struct sun4i_drv
*drv
= drm
->dev_private
;
107 struct sun4i_crtc
*scrtc
;
110 scrtc
= devm_kzalloc(drm
->dev
, sizeof(*scrtc
), GFP_KERNEL
);
115 ret
= drm_crtc_init_with_planes(drm
, &scrtc
->crtc
,
121 dev_err(drm
->dev
, "Couldn't init DRM CRTC\n");
125 drm_crtc_helper_add(&scrtc
->crtc
, &sun4i_crtc_helper_funcs
);