2 * Copyright (C) 2011 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
14 #include <drm/exynos_drm.h>
15 #include <drm/drm_plane_helper.h>
16 #include <drm/drm_atomic_helper.h>
17 #include "exynos_drm_drv.h"
18 #include "exynos_drm_crtc.h"
19 #include "exynos_drm_fb.h"
20 #include "exynos_drm_gem.h"
21 #include "exynos_drm_plane.h"
24 * This function is to get X or Y size shown via screen. This needs length and
25 * start position of CRTC.
28 * CRTC ----------------
31 * There are six cases from a to f.
33 * <----- SCREEN ----->
35 * ----------|------------------|----------
39 * c --------------------------
44 static int exynos_plane_get_size(int start, unsigned length, unsigned last)
46 int end = start + length;
51 size = min_t(unsigned, end, last);
52 } else if (start <= last) {
53 size = min_t(unsigned, last - start, length);
59 static void exynos_plane_mode_set(struct drm_plane *plane,
60 struct drm_crtc *crtc,
61 struct drm_framebuffer *fb,
62 int crtc_x, int crtc_y,
63 unsigned int crtc_w, unsigned int crtc_h,
64 uint32_t src_x, uint32_t src_y,
65 uint32_t src_w, uint32_t src_h)
67 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
68 struct drm_display_mode *mode = &crtc->state->adjusted_mode;
69 unsigned int actual_w;
70 unsigned int actual_h;
72 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
73 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
88 exynos_plane->h_ratio = (src_w << 16) / crtc_w;
89 exynos_plane->v_ratio = (src_h << 16) / crtc_h;
91 /* set drm framebuffer data. */
92 exynos_plane->src_x = src_x;
93 exynos_plane->src_y = src_y;
94 exynos_plane->src_w = (actual_w * exynos_plane->h_ratio) >> 16;
95 exynos_plane->src_h = (actual_h * exynos_plane->v_ratio) >> 16;
97 /* set plane range to be displayed. */
98 exynos_plane->crtc_x = crtc_x;
99 exynos_plane->crtc_y = crtc_y;
100 exynos_plane->crtc_w = actual_w;
101 exynos_plane->crtc_h = actual_h;
103 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
104 exynos_plane->crtc_x, exynos_plane->crtc_y,
105 exynos_plane->crtc_w, exynos_plane->crtc_h);
110 static struct drm_plane_funcs exynos_plane_funcs = {
111 .update_plane = drm_atomic_helper_update_plane,
112 .disable_plane = drm_atomic_helper_disable_plane,
113 .destroy = drm_plane_cleanup,
114 .reset = drm_atomic_helper_plane_reset,
115 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
116 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
119 static int exynos_plane_atomic_check(struct drm_plane *plane,
120 struct drm_plane_state *state)
122 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
129 nr = drm_format_num_planes(state->fb->pixel_format);
130 for (i = 0; i < nr; i++) {
131 struct exynos_drm_gem_obj *obj =
132 exynos_drm_fb_gem_obj(state->fb, i);
135 DRM_DEBUG_KMS("gem object is null\n");
139 exynos_plane->dma_addr[i] = obj->dma_addr +
140 state->fb->offsets[i];
142 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
143 i, (unsigned long)exynos_plane->dma_addr[i]);
149 static void exynos_plane_atomic_update(struct drm_plane *plane,
150 struct drm_plane_state *old_state)
152 struct drm_plane_state *state = plane->state;
153 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
154 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
159 exynos_plane_mode_set(plane, state->crtc, state->fb,
160 state->crtc_x, state->crtc_y,
161 state->crtc_w, state->crtc_h,
162 state->src_x >> 16, state->src_y >> 16,
163 state->src_w >> 16, state->src_h >> 16);
165 exynos_plane->pending_fb = state->fb;
167 if (exynos_crtc->ops->update_plane)
168 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
171 static void exynos_plane_atomic_disable(struct drm_plane *plane,
172 struct drm_plane_state *old_state)
174 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
175 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
177 if (!old_state->crtc)
180 if (exynos_crtc->ops->disable_plane)
181 exynos_crtc->ops->disable_plane(exynos_crtc,
185 static const struct drm_plane_helper_funcs plane_helper_funcs = {
186 .atomic_check = exynos_plane_atomic_check,
187 .atomic_update = exynos_plane_atomic_update,
188 .atomic_disable = exynos_plane_atomic_disable,
191 static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
194 struct drm_device *dev = plane->dev;
195 struct exynos_drm_private *dev_priv = dev->dev_private;
196 struct drm_property *prop;
198 prop = dev_priv->plane_zpos_property;
200 prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE,
201 "zpos", 0, MAX_PLANE - 1);
205 dev_priv->plane_zpos_property = prop;
208 drm_object_attach_property(&plane->base, prop, zpos);
211 int exynos_plane_init(struct drm_device *dev,
212 struct exynos_drm_plane *exynos_plane,
213 unsigned long possible_crtcs, enum drm_plane_type type,
214 const uint32_t *formats, unsigned int fcount,
219 err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs,
220 &exynos_plane_funcs, formats, fcount,
223 DRM_ERROR("failed to initialize plane\n");
227 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
229 exynos_plane->zpos = zpos;
231 if (type == DRM_PLANE_TYPE_OVERLAY)
232 exynos_plane_attach_zpos_property(&exynos_plane->base, zpos);