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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2015 Texas Instruments4 * Author: Jyri Sarha <jsarha@ti.com>5 */6 7#include <drm/drm_atomic.h>8#include <drm/drm_atomic_helper.h>9#include <drm/drm_fourcc.h>10#include <drm/drm_framebuffer.h>11 12#include "tilcdc_drv.h"13 14static const struct drm_plane_funcs tilcdc_plane_funcs = {15 .update_plane = drm_atomic_helper_update_plane,16 .disable_plane = drm_atomic_helper_disable_plane,17 .destroy = drm_plane_cleanup,18 .reset = drm_atomic_helper_plane_reset,19 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,20 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,21};22 23static int tilcdc_plane_atomic_check(struct drm_plane *plane,24 struct drm_atomic_state *state)25{26 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,27 plane);28 struct drm_crtc_state *crtc_state;29 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,30 plane);31 unsigned int pitch;32 33 if (!new_state->crtc)34 return 0;35 36 if (WARN_ON(!new_state->fb))37 return -EINVAL;38 39 if (new_state->crtc_x || new_state->crtc_y) {40 dev_err(plane->dev->dev, "%s: crtc position must be zero.",41 __func__);42 return -EINVAL;43 }44 45 crtc_state = drm_atomic_get_existing_crtc_state(state,46 new_state->crtc);47 /* we should have a crtc state if the plane is attached to a crtc */48 if (WARN_ON(!crtc_state))49 return 0;50 51 if (crtc_state->mode.hdisplay != new_state->crtc_w ||52 crtc_state->mode.vdisplay != new_state->crtc_h) {53 dev_err(plane->dev->dev,54 "%s: Size must match mode (%dx%d == %dx%d)", __func__,55 crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,56 new_state->crtc_w, new_state->crtc_h);57 return -EINVAL;58 }59 60 pitch = crtc_state->mode.hdisplay *61 new_state->fb->format->cpp[0];62 if (new_state->fb->pitches[0] != pitch) {63 dev_err(plane->dev->dev,64 "Invalid pitch: fb and crtc widths must be the same");65 return -EINVAL;66 }67 68 if (old_state->fb && new_state->fb->format != old_state->fb->format) {69 dev_dbg(plane->dev->dev,70 "%s(): pixel format change requires mode_change\n",71 __func__);72 crtc_state->mode_changed = true;73 }74 75 return 0;76}77 78static void tilcdc_plane_atomic_update(struct drm_plane *plane,79 struct drm_atomic_state *state)80{81 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,82 plane);83 84 if (!new_state->crtc)85 return;86 87 if (WARN_ON(!new_state->fb || !new_state->crtc->state))88 return;89 90 if (tilcdc_crtc_update_fb(new_state->crtc,91 new_state->fb,92 new_state->crtc->state->event) == 0) {93 new_state->crtc->state->event = NULL;94 }95}96 97static const struct drm_plane_helper_funcs plane_helper_funcs = {98 .atomic_check = tilcdc_plane_atomic_check,99 .atomic_update = tilcdc_plane_atomic_update,100};101 102int tilcdc_plane_init(struct drm_device *dev,103 struct drm_plane *plane)104{105 struct tilcdc_drm_private *priv = dev->dev_private;106 int ret;107 108 ret = drm_universal_plane_init(dev, plane, 1, &tilcdc_plane_funcs,109 priv->pixelformats,110 priv->num_pixelformats,111 NULL, DRM_PLANE_TYPE_PRIMARY, NULL);112 if (ret) {113 dev_err(dev->dev, "Failed to initialize plane: %d\n", ret);114 return ret;115 }116 117 drm_plane_helper_add(plane, &plane_helper_funcs);118 119 return 0;120}121