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* drivers/staging/omapdrm/omap_crtc.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "omap_drv.h"
#include "drm_mode.h"
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#define to_omap_crtc(x) container_of(x, struct omap_crtc, base)
struct omap_crtc {
struct drm_crtc base;
struct drm_plane *plane;
const char *name;
int id;
/* if there is a pending flip, these will be non-null: */
struct drm_pending_vblank_event *event;
struct drm_framebuffer *old_fb;
};
static void omap_crtc_gamma_set(struct drm_crtc *crtc,
u16 *red, u16 *green, u16 *blue, uint32_t start, uint32_t size)
{
/* not supported.. at least not yet */
}
static void omap_crtc_destroy(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
omap_crtc->plane->funcs->destroy(omap_crtc->plane);
drm_crtc_cleanup(crtc);
kfree(omap_crtc);
}
static void omap_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct omap_drm_private *priv = crtc->dev->dev_private;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
int i;
WARN_ON(omap_plane_dpms(omap_crtc->plane, mode));
for (i = 0; i < priv->num_planes; i++) {
struct drm_plane *plane = priv->planes[i];
if (plane->crtc == crtc)
WARN_ON(omap_plane_dpms(plane, mode));
}
}
static bool omap_crtc_mode_fixup(struct drm_crtc *crtc,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static int omap_crtc_mode_set(struct drm_crtc *crtc,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode,
int x, int y,
struct drm_framebuffer *old_fb)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_plane *plane = omap_crtc->plane;
return omap_plane_mode_set(plane, crtc, crtc->fb,
0, 0, mode->hdisplay, mode->vdisplay,
x << 16, y << 16,
mode->hdisplay << 16, mode->vdisplay << 16);
}
static void omap_crtc_prepare(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
omap_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}
static void omap_crtc_commit(struct drm_crtc *crtc)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%s", omap_crtc->name);
omap_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
}
static int omap_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_plane *plane = omap_crtc->plane;
struct drm_display_mode *mode = &crtc->mode;
return plane->funcs->update_plane(plane, crtc, crtc->fb,
0, 0, mode->hdisplay, mode->vdisplay,
x << 16, y << 16,
mode->hdisplay << 16, mode->vdisplay << 16);
}
static void omap_crtc_load_lut(struct drm_crtc *crtc)
{
}
static void vblank_cb(void *arg)
{
static uint32_t sequence = 0;
struct drm_crtc *crtc = arg;
struct drm_device *dev = crtc->dev;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_pending_vblank_event *event = omap_crtc->event;
unsigned long flags;
struct timeval now;
WARN_ON(!event);
omap_crtc->event = NULL;
/* wakeup userspace */
if (event) {
do_gettimeofday(&now);
spin_lock_irqsave(&dev->event_lock, flags);
/* TODO: we can't yet use the vblank time accounting,
* because omapdss lower layer is the one that knows
* the irq # and registers the handler, which more or
* less defeats how drm_irq works.. for now just fake
* the sequence number and use gettimeofday..
*
event->event.sequence = drm_vblank_count_and_time(
dev, omap_crtc->id, &now);
*/
event->event.sequence = sequence++;
event->event.tv_sec = now.tv_sec;
event->event.tv_usec = now.tv_usec;
list_add_tail(&event->base.link,
&event->base.file_priv->event_list);
wake_up_interruptible(&event->base.file_priv->event_wait);
spin_unlock_irqrestore(&dev->event_lock, flags);
}
}
static void page_flip_cb(void *arg)
{
struct drm_crtc *crtc = arg;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
struct drm_framebuffer *old_fb = omap_crtc->old_fb;
omap_crtc->old_fb = NULL;
omap_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
/* really we'd like to setup the callback atomically w/ setting the
* new scanout buffer to avoid getting stuck waiting an extra vblank
* cycle.. for now go for correctness and later figure out speed..
*/
omap_plane_on_endwin(omap_crtc->plane, vblank_cb, crtc);
}
static int omap_crtc_page_flip_locked(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event)
{
struct drm_device *dev = crtc->dev;
struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
DBG("%d -> %d", crtc->fb ? crtc->fb->base.id : -1, fb->base.id);
if (omap_crtc->event) {
dev_err(dev->dev, "already a pending flip\n");
return -EINVAL;
}
omap_crtc->old_fb = crtc->fb;
omap_crtc->event = event;
crtc->fb = fb;
omap_gem_op_async(omap_framebuffer_bo(fb, 0), OMAP_GEM_READ,
page_flip_cb, crtc);
return 0;
}
static const struct drm_crtc_funcs omap_crtc_funcs = {
.gamma_set = omap_crtc_gamma_set,
.set_config = drm_crtc_helper_set_config,
.destroy = omap_crtc_destroy,
.page_flip = omap_crtc_page_flip_locked,
};
static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = {
.dpms = omap_crtc_dpms,
.mode_fixup = omap_crtc_mode_fixup,
.mode_set = omap_crtc_mode_set,
.prepare = omap_crtc_prepare,
.commit = omap_crtc_commit,
.mode_set_base = omap_crtc_mode_set_base,
.load_lut = omap_crtc_load_lut,
};
/* initialize crtc */
struct drm_crtc *omap_crtc_init(struct drm_device *dev,
struct omap_overlay *ovl, int id)
{
struct drm_crtc *crtc = NULL;
struct omap_crtc *omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL);
DBG("%s", ovl->name);
if (!omap_crtc) {
dev_err(dev->dev, "could not allocate CRTC\n");
goto fail;
}
crtc = &omap_crtc->base;
omap_crtc->plane = omap_plane_init(dev, ovl, (1 << id), true);
omap_crtc->plane->crtc = crtc;
omap_crtc->name = ovl->name;
omap_crtc->id = id;
drm_crtc_init(dev, crtc, &omap_crtc_funcs);
drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs);
return crtc;
fail:
if (crtc) {
omap_crtc_destroy(crtc);
}
return NULL;
}
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