1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Texas Instruments 4 * 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 14 static 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 .reset = drm_atomic_helper_plane_reset, 18 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 19 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 20 }; 21 22 static int tilcdc_plane_atomic_check(struct drm_plane *plane, 23 struct drm_atomic_state *state) 24 { 25 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 26 plane); 27 struct drm_crtc_state *crtc_state; 28 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, 29 plane); 30 unsigned int pitch; 31 32 if (!new_state->crtc) 33 return 0; 34 35 if (WARN_ON(!new_state->fb)) 36 return -EINVAL; 37 38 if (new_state->crtc_x || new_state->crtc_y) { 39 drm_err(plane->dev, "%s: crtc position must be zero.", 40 __func__); 41 return -EINVAL; 42 } 43 44 crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc); 45 /* we should have a crtc state if the plane is attached to a crtc */ 46 if (WARN_ON(!crtc_state)) 47 return 0; 48 49 if (crtc_state->mode.hdisplay != new_state->crtc_w || 50 crtc_state->mode.vdisplay != new_state->crtc_h) { 51 drm_err(plane->dev, 52 "%s: Size must match mode (%dx%d == %dx%d)", __func__, 53 crtc_state->mode.hdisplay, crtc_state->mode.vdisplay, 54 new_state->crtc_w, new_state->crtc_h); 55 return -EINVAL; 56 } 57 58 pitch = crtc_state->mode.hdisplay * 59 new_state->fb->format->cpp[0]; 60 if (new_state->fb->pitches[0] != pitch) { 61 drm_err(plane->dev, 62 "Invalid pitch: fb and crtc widths must be the same"); 63 return -EINVAL; 64 } 65 66 if (old_state->fb && new_state->fb->format != old_state->fb->format) { 67 drm_dbg(plane->dev, 68 "%s(): pixel format change requires mode_change\n", 69 __func__); 70 crtc_state->mode_changed = true; 71 } 72 73 return 0; 74 } 75 76 static void tilcdc_plane_atomic_update(struct drm_plane *plane, 77 struct drm_atomic_state *state) 78 { 79 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 80 plane); 81 82 if (!new_state->crtc) 83 return; 84 85 if (WARN_ON(!new_state->fb || !new_state->crtc->state)) 86 return; 87 88 if (tilcdc_crtc_update_fb(new_state->crtc, 89 new_state->fb, 90 new_state->crtc->state->event) == 0) { 91 new_state->crtc->state->event = NULL; 92 } 93 } 94 95 static const struct drm_plane_helper_funcs plane_helper_funcs = { 96 .atomic_check = tilcdc_plane_atomic_check, 97 .atomic_update = tilcdc_plane_atomic_update, 98 }; 99 100 struct tilcdc_plane *tilcdc_plane_init(struct drm_device *dev) 101 { 102 struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(dev); 103 struct tilcdc_plane *plane; 104 105 plane = drmm_universal_plane_alloc(dev, struct tilcdc_plane, base, 106 1, &tilcdc_plane_funcs, 107 priv->pixelformats, 108 priv->num_pixelformats, 109 NULL, DRM_PLANE_TYPE_PRIMARY, NULL); 110 if (IS_ERR(plane)) 111 return plane; 112 113 drm_plane_helper_add(&plane->base, &plane_helper_funcs); 114 115 return plane; 116 } 117