path: root/drivers/gpu/drm/nouveau/nouveau_display.c

/*
 * Copyright (C) 2008 Maarten Maathuis.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include <acpi/video.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>

#include <nvif/class.h>

#include "nouveau_fbcon.h"
#include "dispnv04/hw.h"
#include "nouveau_crtc.h"
#include "nouveau_dma.h"
#include "nouveau_gem.h"
#include "nouveau_connector.h"
#include "nv50_display.h"

#include "nouveau_fence.h"

#include <nvif/cl0046.h>
#include <nvif/event.h>

static int
nouveau_display_vblank_handler(struct nvif_notify *notify)
{
	struct nouveau_crtc *nv_crtc =
		container_of(notify, typeof(*nv_crtc), vblank);
	drm_crtc_handle_vblank(&nv_crtc->base);
	return NVIF_NOTIFY_KEEP;
}

int
nouveau_display_vblank_enable(struct drm_device *dev, unsigned int pipe)
{
	struct drm_crtc *crtc;
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
		if (nv_crtc->index == pipe) {
			nvif_notify_get(&nv_crtc->vblank);
			return 0;
		}
	}
	return -EINVAL;
}

void
nouveau_display_vblank_disable(struct drm_device *dev, unsigned int pipe)
{
	struct drm_crtc *crtc;
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
		if (nv_crtc->index == pipe) {
			nvif_notify_put(&nv_crtc->vblank);
			return;
		}
	}
}

static inline int
calc(int blanks, int blanke, int total, int line)
{
	if (blanke >= blanks) {
		if (line >= blanks)
			line -= total;
	} else {
		if (line >= blanks)
			line -= total;
		line -= blanke + 1;
	}
	return line;
}

static int
nouveau_display_scanoutpos_head(struct drm_crtc *crtc, int *vpos, int *hpos,
				ktime_t *stime, ktime_t *etime)
{
	struct {
		struct nv04_disp_mthd_v0 base;
		struct nv04_disp_scanoutpos_v0 scan;
	} args = {
		.base.method = NV04_DISP_SCANOUTPOS,
		.base.head = nouveau_crtc(crtc)->index,
	};
	struct nouveau_display *disp = nouveau_display(crtc->dev);
	struct drm_vblank_crtc *vblank = &crtc->dev->vblank[drm_crtc_index(crtc)];
	int ret, retry = 1;

	do {
		ret = nvif_mthd(&disp->disp, 0, &args, sizeof(args));
		if (ret != 0)
			return 0;

		if (args.scan.vline) {
			ret |= DRM_SCANOUTPOS_ACCURATE;
			ret |= DRM_SCANOUTPOS_VALID;
			break;
		}

		if (retry) ndelay(vblank->linedur_ns);
	} while (retry--);

	*hpos = args.scan.hline;
	*vpos = calc(args.scan.vblanks, args.scan.vblanke,
		     args.scan.vtotal, args.scan.vline);
	if (stime) *stime = ns_to_ktime(args.scan.time[0]);
	if (etime) *etime = ns_to_ktime(args.scan.time[1]);

	if (*vpos < 0)
		ret |= DRM_SCANOUTPOS_IN_VBLANK;
	return ret;
}

int
nouveau_display_scanoutpos(struct drm_device *dev, unsigned int pipe,
			   unsigned int flags, int *vpos, int *hpos,
			   ktime_t *stime, ktime_t *etime,
			   const struct drm_display_mode *mode)
{
	struct drm_crtc *crtc;

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head