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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 Texas Instruments
* Author: Jyri Sarha <jsarha@ti.com>
*/
#include <drm/drm_atomic.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fourcc.h>
#include "tilcdc_drv.h"
static const 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,
.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 pitch;
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;
}
pitch = crtc_state->mode.hdisplay *
state->fb->format->cpp[0];
if (state->fb->pitches[0] != pitch) {
dev_err(plane->dev->dev,
"Invalid pitch: fb and crtc widths must be the same");
return -EINVAL;
}
if (old_state->fb && state->fb->format != old_state->fb->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_update_fb(state->crtc,
state->fb,
state->crtc->state->event);
}
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)
{
struct tilcdc_drm_private *priv = dev->dev_private;
int ret;
ret = drm_plane_init(dev, plane, 1,
&tilcdc_plane_funcs,
priv->pixelformats,
priv->num_pixelformats,
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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