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/*
* Copyright (C) 2015 Free Electrons
* Copyright (C) 2015 NextThing Co
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_modes.h>
#include <linux/clk-provider.h>
#include <linux/ioport.h>
#include <linux/of_address.h>
#include <linux/of_graph.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include <video/videomode.h>
#include "sun4i_backend.h"
#include "sun4i_crtc.h"
#include "sun4i_drv.h"
#include "sun4i_tcon.h"
static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
struct drm_device *dev = crtc->dev;
unsigned long flags;
if (crtc->state->event) {
WARN_ON(drm_crtc_vblank_get(crtc) != 0);
spin_lock_irqsave(&dev->event_lock, flags);
scrtc->event = crtc->state->event;
spin_unlock_irqrestore(&dev->event_lock, flags);
crtc->state->event = NULL;
}
}
static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
struct sun4i_drv *drv = scrtc->drv;
struct drm_pending_vblank_event *event = crtc->state->event;
DRM_DEBUG_DRIVER("Committing plane changes\n");
sun4i_backend_commit(drv->backend);
if (event) {
crtc->state->event = NULL;
spin_lock_irq(&crtc->dev->event_lock);
if (drm_crtc_vblank_get(crtc) == 0)
drm_crtc_arm_vblank_event(crtc, event);
else
drm_crtc_send_vblank_event(crtc, event);
spin_unlock_irq(&crtc->dev->event_lock);
}
}
static void sun4i_crtc_disable(struct drm_crtc *crtc)
{
struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
struct sun4i_drv *drv = scrtc->drv;
DRM_DEBUG_DRIVER("Disabling the CRTC\n");
sun4i_tcon_disable(drv->tcon);
if (crtc->state->event && !crtc->state->active) {
spin_lock_irq(&crtc->dev->event_lock);
drm_crtc_send_vblank_event(crtc, crtc->state->event);
spin_unlock_irq(&crtc->dev->event_lock);
crtc->state->event = NULL;
}
}
static void sun4i_crtc_enable(struct drm_crtc *crtc)
{
struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
struct sun4i_drv *drv = scrtc->drv;
DRM_DEBUG_DRIVER("Enabling the CRTC\n");
sun4i_tcon_enable(drv->tcon);
}
static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
.atomic_begin = sun4i_crtc_atomic_begin,
.atomic_flush = sun4i_crtc_atomic_flush,
.disable = sun4i_crtc_disable,
.enable = sun4i_crtc_enable,
};
static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
struct sun4i_drv *drv = scrtc->drv;
DRM_DEBUG_DRIVER("Enabling VBLANK on crtc %p\n", crtc);
sun4i_tcon_enable_vblank(drv->tcon, true);
return 0;
}
static void sun4i_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
struct sun4i_drv *drv = scrtc->drv;
DRM_DEBUG_DRIVER("Disabling VBLANK on crtc %p\n", crtc);
sun4i_tcon_enable_vblank(drv->tcon, false);
}
static const struct drm_crtc_funcs sun4i_crtc_funcs = {
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.destroy = drm_crtc_cleanup,
.page_flip = drm_atomic_helper_page_flip,
.reset = drm_atomic_helper_crtc_reset,
.set_config = drm_atomic_helper_set_config,
.enable_vblank = sun4i_crtc_enable_vblank,
.disable_vblank = sun4i_crtc_disable_vblank,
};
struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
{
struct sun4i_drv *drv = drm->dev_private;
struct sun4i_crtc *scrtc;
int ret;
scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL);
if (!scrtc)
return ERR_PTR(-ENOMEM);
scrtc->drv = drv;
ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
drv->primary,
NULL,
&sun4i_crtc_funcs,
NULL);
if (ret) {
dev_err(drm->dev, "Couldn't init DRM CRTC\n");
return ERR_PTR(ret);
}
drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);
/* Set crtc.port to output port node of the tcon */
scrtc->crtc.port = of_graph_get_port_by_id(drv->tcon->dev->of_node,
1);
return scrtc;
}
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