// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2015 Texas Instruments
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* Author: Jyri Sarha <jsarha@ti.com>
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*/
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#include <drm/drm_atomic.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_fourcc.h>
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#include "tilcdc_drv.h"
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static const struct drm_plane_funcs tilcdc_plane_funcs = {
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.update_plane = drm_atomic_helper_update_plane,
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.disable_plane = drm_atomic_helper_disable_plane,
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.destroy = drm_plane_cleanup,
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.reset = drm_atomic_helper_plane_reset,
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.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
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};
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static int tilcdc_plane_atomic_check(struct drm_plane *plane,
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struct drm_plane_state *state)
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{
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struct drm_crtc_state *crtc_state;
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struct drm_plane_state *old_state = plane->state;
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unsigned int pitch;
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if (!state->crtc)
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return 0;
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if (WARN_ON(!state->fb))
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return -EINVAL;
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if (state->crtc_x || state->crtc_y) {
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dev_err(plane->dev->dev, "%s: crtc position must be zero.",
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__func__);
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return -EINVAL;
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}
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crtc_state = drm_atomic_get_existing_crtc_state(state->state,
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state->crtc);
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/* we should have a crtc state if the plane is attached to a crtc */
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if (WARN_ON(!crtc_state))
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return 0;
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if (crtc_state->mode.hdisplay != state->crtc_w ||
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crtc_state->mode.vdisplay != state->crtc_h) {
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dev_err(plane->dev->dev,
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"%s: Size must match mode (%dx%d == %dx%d)", __func__,
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crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,
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state->crtc_w, state->crtc_h);
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return -EINVAL;
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}
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pitch = crtc_state->mode.hdisplay *
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state->fb->format->cpp[0];
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if (state->fb->pitches[0] != pitch) {
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dev_err(plane->dev->dev,
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"Invalid pitch: fb and crtc widths must be the same");
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return -EINVAL;
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}
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if (old_state->fb && state->fb->format != old_state->fb->format) {
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dev_dbg(plane->dev->dev,
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"%s(): pixel format change requires mode_change\n",
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__func__);
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crtc_state->mode_changed = true;
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}
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return 0;
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}
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static void tilcdc_plane_atomic_update(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct drm_plane_state *state = plane->state;
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if (!state->crtc)
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return;
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if (WARN_ON(!state->fb || !state->crtc->state))
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return;
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if (tilcdc_crtc_update_fb(state->crtc,
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state->fb,
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state->crtc->state->event) == 0) {
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state->crtc->state->event = NULL;
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}
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}
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static const struct drm_plane_helper_funcs plane_helper_funcs = {
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.atomic_check = tilcdc_plane_atomic_check,
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.atomic_update = tilcdc_plane_atomic_update,
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};
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int tilcdc_plane_init(struct drm_device *dev,
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struct drm_plane *plane)
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{
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struct tilcdc_drm_private *priv = dev->dev_private;
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int ret;
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ret = drm_plane_init(dev, plane, 1,
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&tilcdc_plane_funcs,
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priv->pixelformats,
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priv->num_pixelformats,
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true);
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if (ret) {
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dev_err(dev->dev, "Failed to initialize plane: %d\n", ret);
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return ret;
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}
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drm_plane_helper_add(plane, &plane_helper_funcs);
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return 0;
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}
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