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/*
* Copyright (C) 2015 Texas Instruments
* Author: Jyri Sarha <jsarha@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 <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_helper.h>
#include <uapi/drm/drm_fourcc.h>
#include "tilcdc_drv.h"
static const u32 tilcdc_formats[] = { DRM_FORMAT_RGB565,
DRM_FORMAT_RGB888,
DRM_FORMAT_XRGB8888 };
static struct drm_plane_funcs tilcdc_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
.set_property = drm_atomic_helper_plane_set_property,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
static int tilcdc_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct drm_crtc_state *crtc_state;
struct drm_plane_state *old_state = plane->state;
unsigned int depth, bpp;
if (!state->crtc)
return 0;
if (WARN_ON(!state->fb))
return -EINVAL;
if (state->crtc_x || state->crtc_y) {
dev_err(plane->dev->dev, "%s: crtc position must be zero.",
__func__);
return -EINVAL;
}
crtc_state = drm_atomic_get_existing_crtc_state(state->state,
state->crtc);
/* we should have a crtc state if the plane is attached to a crtc */
if (WARN_ON(!crtc_state))
return 0;
if (crtc_state->mode.hdisplay != state->crtc_w ||
crtc_state->mode.vdisplay != state->crtc_h) {
dev_err(plane->dev->dev,
"%s: Size must match mode (%dx%d == %dx%d)", __func__,
crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,
state->crtc_w, state->crtc_h);
return -EINVAL;
}
drm_fb_get_bpp_depth(state->fb->pixel_format, &depth, &bpp);
if (state->fb->pitches[0] != crtc_state->mode.hdisplay * bpp / 8) {
dev_err(plane->dev->dev,
"Invalid pitch: fb and crtc widths must be the same");
return -EINVAL;
}
if (state->fb && old_state->fb &&
state->fb->pixel_format != old_state->fb->pixel_format) {
dev_dbg(plane->dev->dev,
"%s(): pixel format change requires mode_change\n",
__func__);
crtc_state->mode_changed = true;
}
return 0;
}
static void tilcdc_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = plane->state;
if (!state->crtc)
return;
if (WARN_ON(!state->fb || !state->crtc->state))
return;
tilcdc_crtc_page_flip(state->crtc,
state->fb,
state->crtc->state->event,
0);
}
static const struct drm_plane_helper_funcs plane_helper_funcs = {
.atomic_check = tilcdc_plane_atomic_check,
.atomic_update = tilcdc_plane_atomic_update,
};
int tilcdc_plane_init(struct drm_device *dev,
struct drm_plane *plane)
{
int ret;
ret = drm_plane_init(dev, plane, 1,
&tilcdc_plane_funcs,
tilcdc_formats,
ARRAY_SIZE(tilcdc_formats),
true);
if (ret) {
dev_err(dev->dev, "Failed to initialize plane: %d\n", ret);
return ret;
}
drm_plane_helper_add(plane, &plane_helper_funcs);
return 0;
}
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